CN115666329A

CN115666329A - Auxiliary mattress for turning over and auxiliary mattress for turning over

Info

Publication number: CN115666329A
Application number: CN202180000472.5A
Authority: CN
Inventors: 丰岛直和
Original assignee: Taica Corp
Current assignee: Taica Corp
Priority date: 2020-03-02
Filing date: 2021-02-08
Publication date: 2023-01-31
Also published as: WO2021176956A1; JPWO2021176956A1; KR20220146309A; TW202139952A

Abstract

The invention provides a turning-over aid and a mattress, which can facilitate a series of turning-over actions for a user with low muscle strength and can support the realization of self-turning-over. The auxiliary pad for turning over is carried on a mattress, a mattress or a paved object for use, and at least comprises: the 1 st pad, dispose in the direction of height, carry the upper half body side of the user; and a 2 nd pad on which at least the waist and hip of the lower body of the user are placed. The first pad 1 is formed of a cushion material having a predetermined thickness and configured to support at least a part of the back of a user in a supine posture, the second pad 2 is formed of a cushion material having a predetermined thickness, a second support surface 2 formed in a width narrower than the pelvis width of the user is provided at a central portion in a width direction of the second pad 2, a pair of second inclined portions 2 inclined downwardly in an inclined plane or a step shape from an end portion of the second support surface toward an outer side are provided at both end portions in the width direction of the second pad 2, the second support surface is configured to support at least a part of the hip of the user in a supine posture, and the second inclined portions support the trochanter of the femur of the user at the time of a turning-over operation.

Description

Supplementary pad and supplementary mattress of standing up

Technical Field

The present invention relates to a turning-over support pad and a turning-over support mattress, and more particularly to a turning-over support pad and a turning-over support mattress for promoting the self-power of a person to be cared for and enabling a user such as a person to be cared for to turn over by his or her own power.

Background

In recent years, attention has been paid to the promotion of self-supporting care by a caregiver in an ultra-aged society. The self-support program for the care-required person is roughly divided into a rising motion (living motion) in which the care-required person turns over from a supine position, goes through a sitting-up to a standing-up position, and a leaving motion (rehabilitation training, daily motion).

Among them, since the getting-up operation is the most important basic operation and is the start of the operation, various proposals and studies have been made on a supporting method and a supporting tool for smoothly performing the getting-up operation. For example, in the getting-up operation from the supine position to the standing-up position, first, the posture is changed from the supine posture (supine position) to the lateral posture (lateral position), that is, the patient needs to turn over.

Therefore, patent document 1 describes a mattress having a structure that facilitates turning over, which is based on the following knowledge: by selectively sinking the shoulders or the upper arms in the turning direction into the mattress, the shoulders sunk into the mattress become the rotating shaft for turning, thereby promoting the turning. This mattress includes: the mattress comprises a central block arranged at the center of the width direction of the mattress and used for supporting the back and waist of a user in a supine posture, and end blocks arranged at the two ends of the width direction of the mattress and used for supporting the shoulders of the user in the supine posture, wherein the central block is formed to be softer than the outer edge of the end blocks, a hardness adjusting means is arranged at the end blocks and faces the direction of contacting with the central block, the hardness adjusting means adjusts the hardness gradient of the hardness gradually reduced, and the apparent hardness of the position of contacting with the shoulders of the user in the supine posture is adjusted to be lower than that of the central block.

[ Prior art documents ]

[ patent document ]

[ patent document 1 ] Japanese patent laid-open publication No. 2018-57712

Disclosure of Invention

Turning over when changing the posture from the supine position to the lateral position is roughly classified into: a bending rotation type formed by the action of head rotation → upper body rotation → pelvic rotation → lower limb rotation, and a stretching rotation type formed by the action of lower limb rotation → lower limb rotation at the same time or thereafter pelvic rotation → upper body rotation → head rotation. Among them, the rotation of the upper body, particularly the rotation of the shoulder, is the most heavily loaded motion during the turning-over motion. Therefore, the user can easily turn over the body in any rotation type by making the rotation operation of the shoulder not obstructed and making the rotation easy. In the mattress of patent document 1, the shoulder and the upper wrist of the user are easily selectively sunk into the portion of the end block adjusted to have a low hardness by the hardness adjusting means provided in the end block, and the shoulder sunk into the portion becomes a rotation axis for turning over, thereby promoting turning over.

However, the inventors of the present application found that: generally, in the case of a caregiver having a low muscle strength in the lower body and the abdomen, a bending-rotating type turning-over operation is often performed with the upper body as an operation starting point, and even if the turning-over operation of the upper body can be realized, the turning-over operation of the pelvis tends to be difficult. Specifically, it was found that: when a turn-over is attempted, the upper body can be made to face sideways by grasping a fence at the bedside with a hand, but the lower body cannot be made to face sideways, so that the turn-over cannot be completed because the upper body is returned to the original supine position. As described above, when the user tries to turn over his body by himself/herself with a reduced muscular strength for rotating the lower body, the rotating motion of the pelvis is a hurdle motion. In this regard, the mattress of patent document 1 focuses only on the rotation of the shoulders, and no study has been made to complete turning by focusing on the rotation of the pelvis.

On the other hand, when recovery from sleep is generally necessary for health, attention has been paid in recent years to improvement of "sleep quality", and natural turning during sleep has been paid as one of the elements for improving sleep quality. In this case, it is known that various types of turning-over actions, not only the bending-rotation-type turning-over with the upper half body as an action start point, but also the stretching-rotation-type turning-over with the lower half body as an action start point, and those not classified as such, are performed unconsciously during sleep. Therefore, there is a need for a tool or a mattress that can facilitate various types of turning actions and achieve smoother turning.

In view of the above circumstances, the present invention has been made, and an object thereof is to: provided are a turning-over aid and a mattress, which facilitate the rotation of a pelvis, which is difficult for a user with low muscle strength, and which can support turning-over by the user's own strength.

Still another object of the present invention is to: provided are a turning-over aid and a mattress, which facilitate a series of turning-over actions for a user with low muscle strength and which can support the user to turn over by himself/herself.

Still another object of the present invention is to: provided are a turning-over aid and a mattress for improving sleep quality, promoting various turning-over actions, and enabling a user to turn over more smoothly and naturally.

In order to solve the above problems, the turning-over assisting pad of the present invention is a turning-over assisting pad to be placed on a mattress, a bed, or a bed, and includes at least: the first pad is formed of a cushion material having a predetermined thickness, and is configured to support at least a part of the back of a user in a supine posture, the second pad is formed of a cushion material having a predetermined thickness, the second pad is configured to be provided with a second support surface having a width narrower than the width of the pelvis of the user at a widthwise central portion of the second pad, a pair of second inclined portions are provided at both widthwise end portions of the second pad, the second inclined portions are inclined downward outward from the end portions of the second support surface in an inclined plane or a step shape, and are provided at least a part of the second support surface in a longitudinal direction, the second support surface supports at least a part of the hip of the user in a supine posture, and the second inclined portions support the greater trochanter of the thighs of the user during a turn-over operation.

In the supine sleeping position, the upper half of the user is supported by the 1 st pad and the lower half of the user is supported by the 2 nd pad. Wherein the 1 st pad stably supports a back portion centered on the head and the spine, and the 2 nd support surface of the 2 nd pad stably supports a lumbar hip portion centered on the sacrum of the lower body. When performing a bending-rotation-type turning operation with the upper body as an operation starting point, the pelvis is rotated after the upper body is rotated, and the pelvis peripheral portion of the femur, the ilium and the like located in the vicinity thereof, which requires the most power in the turning operation in the turning direction, is supported by the 2 nd inclined portion when the pelvis is rotated. Since the 2 nd inclined part is inclined downward from the end of the 2 nd support surface, the distance between the point of contact between the pelvic peripheral part of the trochanter or the like of the femur with the 2 nd inclined part in the turn-over direction and the body axis of the user becomes shorter, the force (torque) required for pelvic rotation becomes smaller, and the lower body side rotation linked from the pelvic rotation to the lower limb rotation can be facilitated. This reduces the load of rotation of the lower body, and therefore, even a user with a reduced muscle strength associated with rotation of the lower body can easily turn over himself or herself.

In addition, when the pelvis is rotated from the lower half of the body, the greater trochanter of the femur positioned in the turning direction and the pelvis peripheral part of the ilium and the like positioned near the greater trochanter are supported by the 2 nd inclined part when the pelvis is rotated. Since the 2 nd inclined part is inclined downward from the end of the 2 nd support surface, the distance between the point of contact between the pelvis peripheral part of the trochanter or the like of the femur in the turning direction and the 2 nd inclined part and the body axis of the user becomes shorter, and the force (torque) required for the rotation of the pelvis becomes smaller, so that the rotation of the lower body side becomes easier.

Further, the turning-over assisting pad of the present invention may preferably be constituted such that: a1 st support surface formed with a width equal to or less than the shoulder width of a user is provided at the widthwise central portion of a 1 st pad, a pair of 1 st inclined portions inclined downward in an inclined plane or a step shape from the end portions of the 1 st support surface toward the outside are provided at both widthwise end portions of the 1 st pad, and are provided at least at a part in the lengthwise direction of the 1 st support surface, the 1 st support surface supports at least a part of the back of the user in a supine posture, and the 1 st inclined portions support the shoulders of the user when performing a turning-over operation.

In the supine position, the upper half of the user is supported by the 1 st pad and the lower half of the user is supported by the 2 nd pad. Wherein the 1 st support surface stably supports a back portion centered on the head and the spine, and the 2 nd support surface stably supports a hip portion centered on the sacrum of the lower body. In addition, when performing the bending rotation type turning-over with the upper body as the action starting point, the 1 st inclined part supports the shoulder part which most needs force in the rotation action of the turning-over direction when rotating the upper body. Since the 1 st inclined part is inclined downward from the end of the 1 st support surface, the distance between the point where the shoulder part contacts the 1 st inclined part and the body axis of the user becomes shorter, the force (torque) required for the rotation of the upper body side becomes smaller, and the rotation of the upper body side can be facilitated. When the pelvis is rotated next after the rotation of the upper half body, the 2 nd inclined part supports the greater trochanter of the femur, which requires the most power in the turning-over direction rotation, and the pelvis peripheral part such as the ilium located in the vicinity thereof. Since the 2 nd inclined part is also inclined downward from the end of the 2 nd support surface, the distance between the point of contact between the pelvic peripheral part of the greater trochanter or the like of the femur with the 2 nd inclined part in the turn-over direction and the body axis of the user becomes shorter, the force (torque) required for pelvic rotation becomes smaller, and the lower body side rotation linked from the pelvic rotation to the lower limb rotation can be facilitated. This reduces the load of rotation of the lower body as well as the upper body, thereby facilitating self-supporting turning.

In the case of performing the stretching and rotating type turning with the lower half body as the operation starting point, when the pelvis is rotated from the lower half body side, the 2 nd inclined part supports the greater trochanter of the femur in the turning direction and the pelvis peripheral part of the ilium and the like located in the vicinity thereof. Since the 2 nd slope is inclined downward from the end of the 2 nd support surface, the distance between the point of contact of the pelvic peripheral portion of the greater trochanter of the femur or the like with the 2 nd slope in the turning direction and the body axis of the user becomes shorter, and the force (torque) required for pelvic rotation becomes smaller, facilitating the rotation of the lower body side. When the turning movement is transferred to the turning of the upper body in conjunction with the turning of the lower body, the 1 st supporting part supports the shoulder part located in the turning direction, which requires the most force in the turning movement. Since the 1 st inclined part is inclined downward from the end of the 1 st support surface, the distance between the point where the shoulder part contacts the 1 st inclined part and the body axis of the user becomes shorter, the force (torque) required for the rotation of the upper body side becomes smaller, and the rotation of the upper body side can be facilitated. Thus, in the stretching and rotating type turning-over, the load of the rotation of the lower body is reduced as well as the upper body, so that the self-turning-over can be facilitated.

In the turn-over assisting pad according to the present invention, it is preferable that an inclination angle θ 1 of the 1 st inclined part with respect to the horizontal plane is different from an inclination angle θ 2 of the 2 nd inclined part with respect to the horizontal plane. By making the inclination angle θ of the inclined portion of the 1 st pad on the upper body side different from the inclination angle θ of the inclined portion of the 2 nd pad on the lower body side, the turning timing and the load reduction action associated with turning can be appropriately adjusted on the upper body side and the lower body side. Therefore, a turning-over assisting mat corresponding to the muscular strength of the user or the desired turning-over type can be obtained.

Here, in the present invention, when the 1 st inclined portion is formed not by a flat surface but by a step shape, the inclination angle θ 1 in this case means an angle such that: the end of the 1 st support surface in the cross-sectional view is taken as an inclination starting point, the inclination starting point and the top end of the lowest step portion constituting the 1 st inclined portion are connected by a shortest straight line, and a plane including the shortest straight line is taken as an inclined surface whose angle with respect to the horizontal plane is. Similarly, in the present invention, the inclination angle θ 2 when the 2 nd inclined part is formed in a stepwise shape means an angle such that: the end of the 2 nd support surface in the cross-sectional view is taken as an inclination starting point, the inclination starting point and the top end of the lowermost step portion constituting the 2 nd inclined portion are connected by the shortest straight line, and a plane including the shortest straight line is taken as an inclined surface whose angle with respect to the horizontal plane is. In the present invention, when the 1 st inclined portion is formed not in a plane but in a curved surface, the inclination angle θ 1 in this case means an angle such that: the starting point of the inclination of the end of the 1 st support surface and the end point of the inclination of the bottom surface end of the 1 st pad (the bottom surface end of the 1 st inclined part) in the cross-sectional view are connected by the shortest straight line, and a plane including the shortest straight line is taken as an inclined surface whose angle with respect to the horizontal plane. Similarly, the inclination angle θ 2 when the 2 nd inclined portion is formed in a curved surface shape is an angle: a starting point of the inclination of the end of the No. 2 support surface and an ending point of the inclination of the bottom surface end of the No. 2 pad (bottom surface end of the No. 2 inclined part) in a cross-sectional view are connected by a shortest straight line, and a plane including the shortest straight line is taken as an inclined surface having an angle with respect to a horizontal plane.

In the turn-over assisting pad according to the present invention, it is preferable that an inclination angle θ 1 of the 1 st inclined part with respect to the horizontal plane is larger than an inclination angle θ 2 of the 2 nd inclined part with respect to the horizontal plane (θ 1 > θ 2). Thus, the turning-over assisting pad can be obtained which can promote the turning-over action of the upper half body side and can make the lower half body side slowly turn over.

Further, it is also preferable that the width W1 of the 1 st support surface of the turn assist pad of the present invention is wider than the width W2 of the 2 nd support surface (W1 > W2). Thus, since the inclined portion of the second pad on the lower half side is positioned closer to the center in the width direction of the turning-over assisting pad than the first pad on the upper half side, the pelvic peripheral portion in the turning-over direction is promptly supported by contact with the second inclined portion when the pelvis is to be rotated, and the timing of starting to rotate the pelvis with a low torque is set in advance. Therefore, when the user performs the bending rotation type turning, the start of the pelvic rotation operation after the upper body side is rotated is promoted. In addition, when the stretching-rotation type turning is performed, the rotation of the pelvis is smoothly started, and the rotation is easily linked with the rotation of the upper half body. In this way, the lower body side rotating operation (hereinafter also referred to as the lower body side rotating operation) formed by the combination of the rotating operation of the pelvis and the rotating operation of the lower limb portion is interlocked with the rotating operation of the upper body with a lower torque, and thus, the self-supporting body can be turned more easily.

In addition, it is also preferable that the height H1 of the 1 st support surface of the turn assist pad of the present invention is higher than the height H2 of the 2 nd support surface (H1 > H2). Accordingly, since the height difference is generated between the 1 st pad on the upper body side and the 2 nd pad on the lower body side, the height difference supports the curve of the body from the hip to the lumbar of the user, so that a natural sleeping posture can be obtained, and the start of the rotation operation of the pelvis is promoted by the height difference when the user turns over. Therefore, in any of the turning motions of the bending rotation type and the stretching rotation type, the rotation motion of the upper body and the rotation motion of the lower body are more naturally linked, and thus the self-turning can be more easily performed.

In the turn-over assisting pad according to the present invention, it is preferable that the width W1 of the 1 st supporting surface is wider than the width W2 of the 2 nd supporting surface (W1 > W2), and the inclination angle θ 1 of the 1 st inclined part with respect to the horizontal plane is substantially equal to the inclination angle θ 2 of the 2 nd inclined part with respect to the horizontal plane (θ 1= θ 2). Accordingly, since the inclined portion of the 2 nd pad on the lower half side is positioned closer to the center in the width direction of the turning-over assisting pad than the 1 st pad on the upper half side, the pelvis peripheral portion in the turning-over direction is promptly brought into contact with and supported by the 2 nd inclined portion when the user performs the bending rotation type turning-over, and therefore, the start of the pelvis rotation operation after the turning-over of the upper half side is promoted. On the other hand, when the stretching-rotation type body is turned over, the rotation of the lower body side is smoothly started, and the rotation is easily linked with the rotation of the upper body side. Further, by making the inclination angles of the two inclined portions substantially equal (θ 1= θ 2), the rotational forces on the upper body side and the lower body side can be set to be close to each other. Therefore, the rotation of the upper body is interlocked with the rotation of the lower body, and the rotation torques of the upper body and the lower body are well balanced, so that the self-turning is easy.

Further, it is preferable that the width W1 of the 1 st supporting surface of the turn-over assisting pad of the present invention is wider than the width W2 of the 2 nd supporting surface (W1 > W2), the inclination angle θ 1 of the 1 st inclined part with respect to the horizontal plane is substantially equal to the inclination angle θ 2 of the 2 nd inclined part with respect to the horizontal plane (θ 1= θ 2), and the height H1 of the 1 st supporting surface is higher than the height H2 of the 2 nd supporting surface (H1 > H2). Accordingly, a height difference is generated between the 1 st pad on the upper body side and the 2 nd pad on the lower body side, and therefore, the height difference is supported along the body curve from the hip to the lumbar of the user, so that a natural sleeping posture can be obtained, and the start of the rotation operation of the pelvis is promoted by the height difference when the user turns over. Further, by making the width W1 of the 1 st support surface wider than the width W2 of the 2 nd support surface (W1 > W2), when the user performs the bending rotation type turning, the start of the pelvic rotation operation after the upper body side rotation is promoted, and when the stretching rotation type turning is performed, the pelvic rotation is smoothly started, so that the interlocking of the rotation from the lower body side to the upper body side is facilitated. Further, by making the inclination angles of the two inclined portions substantially equal (θ 1= θ 2), the rotational forces of the upper body side and the lower body side can be set uniformly. Therefore, the rotation action of the upper body and the rotation action of the lower body are linked, and meanwhile, the rotation torques of the upper body side and the lower body side are kept well balanced, so that the self-help turning is easy.

In the turn-over assisting pad of the present invention, it is preferable that a width W1 of the 1 st supporting surface is substantially equal to a width W2 of the 2 nd supporting surface (W1 = W2), an inclination angle θ 1 of the 1 st inclined portion with respect to the horizontal plane is substantially equal to an inclination angle θ 2 of the 2 nd inclined portion with respect to the horizontal plane (θ 1= θ 2), and a height H1 of the 1 st supporting surface is higher than a height H2 of the 2 nd supporting surface (H1 > H2). Accordingly, since the height difference is generated between the 1 st pad on the upper body side and the 2 nd pad on the lower body side, the height difference supports the user along the body curve from the hip to the lumbar region of the user, and the start of the rotation operation of the pelvis is promoted by the height difference when the user turns over. Therefore, the rotation of the upper body is interlocked with the rotation of the lower body, and the self-turning can be facilitated with a simple structure.

In the turning-over assisting pad of the present invention, it is preferable that at least the 3 rd pad made of a cushion material having a predetermined thickness is disposed between the 1 st pad and the 2 nd pad. Therefore, the utility model can be adjusted according to the physique and the difficulty of the physical activity of the user, and forms the auxiliary pad for turning over.

In the turn-over assisting pad of the present invention, it is preferable that a 3 rd pad formed of a cushion material having a predetermined thickness is disposed on the foot side of the 2 nd pad, and the 3 rd pad has the same structure as the 1 st pad. Accordingly, the turning-over assisting pad in the form in which the 1 st pad is disposed on both sides of the 2 nd pad with respect to the longitudinal direction thereof can be obtained, and therefore, the operational effects of the present invention can be obtained regardless of which direction the user sleeps during use.

The turn-over assisting mattress of the present invention is a mattress provided with the turn-over assisting mattress, and the turn-over assisting mattress is disposed on the upper surface of the base layer formed of the cushion material. Thus, a mattress incorporating the turning-over assist pad can be obtained.

In the turn-over assisting mattress of the present invention, the 1 st pad and the 2 nd pad may be preferably arranged on the base layer at an interval. Therefore, the turning auxiliary pad can be arranged on the base layer at a proper position.

In the turn-over assist mattress according to the present invention, the base layer may have a width larger than the widths of the first pad and the second pad, and at least one end of the base layer in the width direction may have an end block protruding in the height direction at least in a part of the base layer in the longitudinal direction. Through setting up the tip block, can prevent that the user from dropping from the base member layer when standing up, can carry out the action of standing up more safely on the mattress.

In the turn-over assist mattress according to the present invention, it is preferable that at least 1 or more upper layers made of a cushion material are laminated on the turn-over assist mattress, and the hardness of the cushion material constituting the upper layers is lower than that of the cushion material constituting the 1 st pad. By selecting a cushioning material having a lower hardness than that of the cushioning material of the 1 st pad as the cushioning material of the upper layer, the body of the user is in contact with the soft upper layer while maintaining the function of the turning assist pad, so that the sleeping comfort of the mattress can be improved.

The effects of the present invention are explained below:

according to the present invention, a turning-over assist pad and a mattress including the same having the following excellent effects can be provided.

(1) Since the load involved in the rotation of the lower body, particularly the load involved in the rotation of the pelvis, is reduced, even for a user with reduced muscular strength involved in the rotation of the lower body, the user can easily turn over himself or herself.

(2) The rotation of the upper body is interlocked with the rotation of the pelvis, so that the user with low muscle strength can turn over easily.

(3) Can promote various turning-over actions, thereby promoting natural turning-over in sleep and improving sleep quality.

(4) In the supine position (supine position), the thoracic vertebra is opened, so that the breathing is smooth during sleeping, and the sleeping quality is improved.

Drawings

Fig. 1 showsbase:Sub>A turning-over assisting pad according to embodiment 1, (base:Sub>A) isbase:Sub>A perspective view, (B) isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A 'of fig. 1 (base:Sub>A), and (c) isbase:Sub>A sectional view taken along line B-B' of fig. 1 (base:Sub>A).

Fig. 2 is a view showing a position of the body turning assisting pad of fig. 1 in contact with the shoulder and pelvis of the user in the supine position.

Fig. 3 is an explanatory view showing a torque (T = F × L) when the upper body is rotated in the supine posture, (a) is an explanatory view showing a torque when the turning-over assist pad according to embodiment 1 is used, and (b) is an explanatory view showing a torque when a normal mattress is used as a comparative example.

Fig. 4 is a perspective view showing another example of the turn-over assisting pad according to embodiment 1.

Fig. 5 is a perspective view showing another example of the turning-over assisting pad according to embodiment 1.

Fig. 6 is an explanatory view showing a state of use of the turn-over assisting mat shown in fig. 1.

Fig. 7 is a perspective view showing the turn assist pad according to embodiment 2.

Fig. 8 is a perspective view showing another example of the turn-over assisting pad according to embodiment 2.

Fig. 9 is a perspective view showing the turn assist pad according to embodiment 3.

Fig. 10 shows a turn-over assisting pad according to embodiment 4, wherein (a) is a perspective view, (b) is a cross-sectional view taken along line C-C 'of fig. 10 (a), and (C) is a cross-sectional view taken along line D-D' of fig. 10 (a).

Fig. 11 shows another example of the turn-over assisting pad according to embodiment 4, wherein (a) is a perspective view, (b) is a sectional view taken along line E-E 'of fig. 11 (a), and (c) is a sectional view taken along line F-F' of fig. 11 (a).

Fig. 12 shows a turn-over assisting pad according to embodiment 5, wherein (a) is a perspective view and (b) is a sectional view taken along line G-G' of fig. 12 (a).

Fig. 13 shows an embodiment of a turn-over assist mattress in which the turn-over assist mattress is incorporated, wherein (a) is an exploded perspective view, (b) is a side view of fig. 13 (a) as seen from the head side of the 1 st pad, and (c) is a side view of fig. 13 (a) as seen from the foot side of the 2 nd pad.

Fig. 14 is a perspective view showing a turn-over assist mattress according to another embodiment.

Fig. 15 shows a method for quantifying the load of the turning-over operation, (a) is a simulator, and (b) is a diagram for explaining a method for measuring the torque of the turning-over operation using the simulator.

Fig. 16 is a graph showing the relationship between the inclination angle of the inclined surface of the turning assist pad according to example 1 and the torque.

Fig. 17 is a graph showing the relationship between the inclination structure of the turn assist pad according to example 2 and the torque.

Fig. 18 is a perspective view showing 5 turn assist pads tested in example 3.

Fig. 19 is a perspective view showing 4 turn-over assisting pads tested in comparative examples 1 to 4.

Fig. 20 is an exploded view showing the construction of the 3-turn assist mattress tested in example 4.

Detailed description of the preferred embodiments

As shown in fig. 1 and 2, the turn-over assisting pad 2 according to embodiment 1 of the present invention is composed of a 1 st pad 3 on which the upper half of the user is placed and a 2 nd pad 4 on which the lower half of the user is placed, and the 1 st pad 3 and the 2 nd pad 4 are arranged in a line in the height direction. In the present specification, the up-down direction refers to the up-down direction in a state where the turning assist pad 2 is set in use such as a mattress or a bed, that is, the up-down direction in fig. 1. The width direction in the present specification means a width direction in a state where the turning-over assisting pad 2 is used, that is, a right-left direction in fig. 2; the longitudinal direction refers to a longitudinal direction (height direction) in a state where the turn-over assisting pad 2 is used, that is, a vertical direction in fig. 2.

First, the 1 st pad 3 on which the upper half of the user is placed will be described. As shown in fig. 1, the 1 st pad 3 includes: a 1 st support surface 31 extending in a longitudinal direction (height direction) at a widthwise central portion thereof and formed as a substantially flat surface; and a 1 st inclined portion 32 inclined downward outward from the end portion in the longitudinal direction of the 1 st supporting surface 31 to form a pair of inclined surfaces.

The length W1 of the 1 st supporting surface 31 in the width direction and the inclination angle θ 1 of the 1 st inclined portion 32 in the 1 st pad 3 can be set so as to provide a desired effect to the 1 st pad 3. By appropriately setting the length W1 in the width direction of the 1 st support surface 31, the rotation start time or rotation start torque on the upper half body side and the back support stability in the supine position can be adjusted, and by adjusting the torque during the rotation operation in cooperation with the inclination angle θ 1 of the 1 st inclined portion 31, the intended low load rotation operation on the upper half body side can be appropriately set. Specifically, the width-directional length W1 of the 1 st support surface 31 is within a range in which the support stability of the upper half of the user can be secured, and in this range, the smaller the width-directional length W1 of the 1 st support surface 31 is set, the smaller the force (torque) required for the rotation of the upper half is, and the earlier the rotation operation is started. The larger the inclination angle θ 1 of the 1 st inclined portion 32 is set, the smaller the torque required for the rotation of the upper half. Therefore, by combining various setting values of the length W1 of the 1 st supporting surface 31 in the width direction and the inclination angle θ 1 of the 1 st inclined portion 32, the degree of difficulty of rotation of the upper half can be adjusted in accordance with the turning-over mode, the body type of the user, and the like. The 1 st supporting surface 31 and the 1 st inclined portion 32 will be described in detail below.

As shown in fig. 2, the 1 st support surface 31 of the 1 st pad 3 is configured to support at least a part of the back of the body of the user B in the supine posture. The size of the 1 st support surface 31 in the present embodiment is: the length W1 in the width direction was 25cm, the length in the length direction (height direction) was 90cm, and the height H1 (thickness of the cushioning material at the 1 st support surface 31 portion) was 3cm, and the back support was designed to support the back centered on the head and the spine of the user B in the supine posture. The length W1 in the width direction of the 1 st supporting surface 31 is arranged so that the shoulder S of the user B in the supine posture faces the 1 st inclined portion 32 outside the 1 st supporting surface 31 as described below, and therefore, the length W1 in the width direction of the 1 st supporting surface 31 is set to a width equal to or less than the shoulder width SW of the user B, preferably equal to or less than the length from one shoulder to the other shoulder (shoulder width) of the user B. The shoulder S of the user B is a region near the acromion and including at least the greater tubercle from the acromion to the upper arm bone. The shoulder width SW of the user B is a length from one shoulder to the other shoulder, more specifically, a maximum transverse diameter of the body measured perpendicular to the sagittal plane at a position where the contour of the deltoid portion protrudes most outward. The 1 st support surface 31 has a width W1 in the width direction equal to or less than the shoulder width of the user, preferably equal to or less than the acromion width, and preferably equal to or more than the length between the lower corners of the left and right scapulae of the user B, more specifically, 15cm to 40cm, more preferably 15cm to 35cm, and particularly preferably 20cm to 30cm, from the viewpoint of stably supporting the upper body of the user B. As described below, when the 1 st supporting surface 31 has a width-directional length W1 equal to the width-directional length W2 of the 2 nd supporting surface 41 (W1 = W2), the width-directional length W1 of the 1 st supporting surface 31 is set to the maximum setting value of the width-directional length W2 of the 2 nd supporting surface 41, which is equal to or less than the pelvis width PW of the user B. The length of the 1 st support surface 31 in the longitudinal direction (height direction) is set to be appropriate so that the back can be supported from the head of the user B. Further, in order to reduce the force required for the upper body turning and to perform the appropriate turning, the height H1 of the 1 st support surface 31 is appropriately set in accordance with the inclination angle θ 1 described below. In the present embodiment, the 1 st support surface 31 is formed as a substantially flat surface, but may be formed in any shape as long as it can support at least a part of the back of the body of the user B in the supine posture, and the shape is not limited to a flat surface.

As shown in fig. 1 and 2, the pair of 1 st inclined portions 32 of the 1 st pad 3 in the present embodiment are formed so as to extend across the entire length of the 1 st support surface 31, and support the entire shoulders and upper arms of the user B during the turning-over operation. When the back of the user B is supported by the 1 st support surface 31 of the 1 st pad 3, a region (hereinafter, referred to as shoulder side portion SA) formed by the shoulder S and a back side portion connected to the shoulder S, which is not supported by the 1 st support surface 31, is located at a position facing the 1 st inclined portion 32 inclined downward from an end of the 1 st support surface 31. Therefore, when the user B rotates the upper body, the shoulder portion SA positioned in the turning-over direction is supported by the 1 st inclined portion 32. As shown in fig. 3 (a), when the user B performs the turning-over operation, the distance between the contact point G between the shoulder portion SA of the user' S shoulder S including the turning-over direction and the 1 st inclined portion 32 and the body axis X of the user becomes shorter, and the force required for the rotation of the upper body is smaller, thereby facilitating the rotation of the upper body. Here, the shoulder portion SA is a portion including at least the shoulder S (a region from the acromion to the greater tuberosity of the upper arm bone) of the user B, and is a portion not supported by the 1 st support surface 31, and therefore, a region from the greater tuberosity of the upper arm bone to the lower corner of the shoulder blade on the back side of the user B is included by setting the length W1 in the width direction of the 1 st support surface 31. The 1 st inclined part 32 in the present embodiment is formed of a flat surface, but may have a curved surface structure or a stepped structure as shown in the following embodiments. In the case of the stepped structure, the inclined portion may include a substantially vertical inclined surface, for example, a stepped structure, or a structure in which the first inclined surface continuing from the end of the 1 st supporting surface 31 is formed vertically and then changes to an acute angle. By forming the 1 st inclined portion 32 as a stepped inclined surface in this manner, the degree of difficulty of rotation of the upper body side can be adjusted more finely in accordance with the turning pattern, the body shape of the user, and the like. The inclination angle of the 1 st inclined part 32 also includes a structure in which the inclination angle gradually (continuously or discontinuously) changes in the longitudinal direction of the 1 st pad 3. The 1 st inclined part 32 may be formed to support at least the shoulder portion SA of the body of the user B in the supine posture, and therefore, may not be provided to extend in the longitudinal direction of the 1 st support surface 31, and may be configured to provide the 1 st inclined part only at the shoulder portion SA of the user B.

The function of the 1 st inclined portion 32 of the 1 st pad 3 will be described in more detail with reference to fig. 3. Fig. 3 is a diagram showing the torque (T = F × L) when the upper body of the user is rotated in the supine posture, in fig. 3 (a), the torque when the turning-over assist pad according to the present embodiment is used, and in fig. 3 (b), the torque when a normal flat mattress is used. In the figure, the force required for the turning motion is represented as a torque (torsional strength) at the rotation center (body axis) X. The torque T is expressed as a product of a force F acting in a tangential direction of the rotation circle and a distance L between the contact point G and the rotation center X (T = F × L). Therefore, the value of the torque T is reduced by shortening the distance L between the contact point G and the rotation center X. Fig. 3 (B) shows an example of a normal (no inclined part is provided) mattress, and according to this example, the position G where the shoulder portion SA of the user B contacts the mattress is the outer side of the shoulder S. On the other hand, as shown in fig. 3 (a), since the 1 st inclined portion 32 is provided in the 1 st pad 3, the position G where the shoulder portion SA of the user B contacts the 1 st pad 3 is moved more inward than in fig. 3 (B), and therefore the contact point G approaches the rotation center X, the distance L between the contact point G and the rotation center X becomes shorter, and the torque T becomes lower. Therefore, the load of the rotation of the upper body side becomes small, and therefore, the rotation of the upper body side can be performed with a small force.

The inclination angle θ 1 of the 1 st inclined portion 32 of the 1 st pad 3 with respect to the horizontal plane becomes larger as the angle θ 1 becomes larger, the distance L between the contact point G of the shoulder portion SA and the rotation center X becomes shorter, and therefore, the force required for the rotation of the upper half body side is reduced, but on the other hand, if the rotation operation is too easy, the body of the user B in the supine position becomes unstable. Therefore, it is preferable to set the inclination angle θ 1 so that the supine position stability contributing to the sleep comfort and the ease of turning (turning) can be both obtained. Specifically, as in the present embodiment, when the 1 st inclined portion 32 is formed of a planar inclined surface, the inclination angle θ 1 is preferably less than 40 degrees, more preferably less than 30 degrees, further preferably 5 to 20 degrees, and particularly preferably 10 to 15 degrees. When the 1 st inclined portion 32 is formed not by a flat surface as in the present embodiment but by a stepped structure, the inclination angle θ 1 is set to an angle as follows: an end portion of the 1 st support surface 31 in a cross-sectional view is set as an inclination starting point, the inclination starting point and a top end of a lowermost step portion constituting the 1 st inclined portion 32 are connected by a shortest straight line, a plane including the shortest straight line is set as an inclined surface, and an angle of the inclined surface with respect to a horizontal plane is set as an inclination angle θ 1. When the 1 st inclined portion 32 is formed of a curved surface structure, the inclination angle θ 1 is set to an angle as follows: the end of the 1 st support surface 31 in the cross-sectional view is taken as an inclination starting point, the inclination starting point and the inclination end point of the bottom surface end of the 1 st pad 3 (bottom surface end of the 1 st inclined portion 32) are connected by the shortest straight line, a plane including the shortest straight line is taken as an inclined surface, and the angle of the inclined surface with respect to the horizontal plane is taken as the inclination angle θ 1. In the case where the inclination angle of the 1 st inclined portion 32 is configured to be gradually (continuously or discontinuously) changed in the longitudinal direction of the 1 st pad 3, the inclination angle θ 1 is an angle of an inclined surface of a portion supporting the shoulder portion SA of the user B.

Next, the second pad 4 on which the lower body side of the user is placed will be described. As shown in fig. 1, the 2 nd pad 4 includes: a 2 nd support surface 41 formed to extend in a longitudinal direction (height direction) at a widthwise central portion thereof as a substantially flat surface; and a 2 nd inclined portion 42 formed as a pair of inclined surfaces inclined downward outward from the end portions of the 2 nd supporting surface 41 in the longitudinal direction.

The length W2 of the 2 nd supporting surface 41 in the width direction and the inclination angle θ 2 of the 2 nd inclined part 42 in the 2 nd pad 4 can be set so as to give a desired effect to the 2 nd pad 4. By appropriately setting the length W2 in the width direction of the 2 nd supporting surface 41, the rotation start time or rotation start torque of the lower body side (pelvis), and the pelvic portion support stability in the supine position can be adjusted, and by cooperating with the inclination angle θ 2 of the 2 nd inclined portion 42, the torque during the rotation operation can be adjusted, and the intended low-load rotation operation of the lower body side can be appropriately set. Specifically, when the width-directional length W2 of the 2 nd supporting surface 41 is set to a range in which the support stability of the lower body side of the user is ensured, in this range, the smaller the width-directional length W2 of the 2 nd supporting surface 41 is set, the smaller the force (torque) required for the rotation of the lower body side is, and the earlier the rotation operation is started. Further, the larger the inclination angle θ 2 is set, the smaller the torque required for rotation of the lower body side. Therefore, by combining various setting values of the length W2 of the 2 nd supporting surface 41 in the width direction and the inclination angle θ 2 of the 2 nd inclined portion 42, the degree of difficulty of rotation of the lower body side can be adjusted in accordance with the turning-over mode, the body shape of the user, and the like. The 2 nd supporting surface 41 and the 2 nd inclined portion 42 will be described in detail below.

As shown in fig. 2, the 2 nd support surface 41 of the 2 nd pad 4 is configured to support at least a part of the waist-hip of the body of the user B in the supine position. The size of the 2 nd support surface 41 in the present embodiment is: the length W2 in the width direction was 13cm, the length in the length direction (height direction) was 90cm, and the height H2 (thickness of the cushion material at the 2 nd support surface 41 portion) was 3cm, and the support was designed to support the hip and waist around the sacrum of the user B in the supine position. The length W2 in the width direction of the 2 nd support surface 41 is arranged so that the greater trochanter of the femur of the user B in the supine posture faces the 2 nd inclined portion 42 outside the 2 nd support surface 41 as described later, and therefore the length W2 in the width direction of the 2 nd support surface 41 is set to a width equal to or less than the pelvic width PW of the user B, where the pelvic width PW of the user B is a length from the anterior superior iliac spine P on one side to the anterior superior iliac spine P on the other side. The anterior superior iliac spine P is a protrusion located at the anterior edge of the iliac crest of the ilium constituting the pelvis. Specifically, the length W2 of the 2 nd support surface 41 in the width direction is set to a width equal to or less than the pelvic width PW of the user B, and is preferably set to a width equal to or greater than the width between at least the posterior superior iliac spine (the protrusion located at the posterior iliac edge of the pelvis) of the body of the user B, more specifically, 5cm to 30cm, more preferably 10cm to 25cm, and still more preferably 10cm to 20cm, from the viewpoint of stably supporting the lower body of the user B. The length of the 2 nd supporting surface 41 in the longitudinal direction (height direction) is set to be appropriate so as to support the lower body of the user B. Further, in order to reduce the force required for the rotation of the lower body, the height H2 of the 2 nd supporting surface 41 is appropriately set in accordance with the inclination angle θ 2 described later. In the present embodiment, the 2 nd support surface 41 is formed as a substantially flat surface, but may be formed in any shape as long as it can support at least a part of the back of the body of the user B in the supine posture, and the shape is not limited to the flat surface.

As shown in fig. 1 and 2, the pair of 2 nd inclined parts 42 of the 2 nd pad 4 in the present embodiment is formed as a trochanter that spans the entire length direction of the 2 nd support surface 41 and supports at least the femur of the user B during the turning-over operation. When the 2 nd support surface 41 of the 2 nd cushion 4 supports the hip region of the user B around the posterior superior iliac spine, a region (hereinafter referred to as a pelvic peripheral region PA) formed by the superior iliac spine P of the greater trochanter and pelvis and the hip region continuous with the superior iliac spine P, which is not supported by the 2 nd support surface 41, is located at a position facing the 2 nd inclined portion 42 inclined downward from the end of the 2 nd support surface 41. Therefore, when the user B rotates the lower body, the pelvis peripheral portion PA in the turning direction is supported by the 2 nd inclined portion 42. In this way, when the user B performs the turning operation, the distance between the contact point G of the pelvis peripheral portion PA of the greater trochanter including the femur of the user positioned in the turning direction and the 2 nd inclined portion 42 and the body axis X of the user becomes shorter, and the force required for the rotation of the pelvis becomes smaller, thereby promoting the rotation of the lower body side. The action of promoting this rotation of the lower body side is the same as the action of the 1 st inclined part 32 of the 1 st pad 3 shown in fig. 3 (a) of fig. 3. Here, the pelvic peripheral portion PA is a portion including at least the greater trochanter of the femur and the anterior superior iliac spine P of the pelvis of the user B, and is a portion not supported by the 2 nd support surface 41, and therefore, the region from the anterior superior iliac spine P to the posterior superior iliac spine on the hip side of the pelvis of the user B is included by setting the length W2 of the 2 nd support surface 41 in the width direction. The 2 nd inclined part 42 in the present embodiment is formed of a flat surface, but may have a curved surface structure or a stepped structure as shown in the following embodiments. In the case of the stepped structure, the inclined surface may include a substantially vertical inclined surface, for example, a stepped structure, or a structure in which the first inclined surface continuing from the end of the 2 nd support surface 41 is formed vertically and then changes to an acute angle. By forming the 2 nd inclined part 42 as a stepped inclined surface in this manner, the degree of difficulty of rotation of the lower body side can be adjusted more finely in accordance with the turning mode, the body shape of the user, and the like. The inclination angle of the 2 nd inclined part 42 also includes a structure that gradually (continuously or discontinuously) changes in the longitudinal direction of the 2 nd pad 4. Since the 2 nd inclined part 42 can be formed to support at least the pelvic peripheral part PA of the body of the user B in the supine posture, the 2 nd inclined part may not be provided so as to extend in the longitudinal direction of the 2 nd support surface 41, and the 2 nd inclined part may be provided only in the pelvic peripheral part PA of the user B.

When the angle θ 2 of the 2 nd inclined portion 42 of the 2 nd pad 4 with respect to the horizontal plane is increased, the distance L between the contact point G of the pelvis peripheral portion PA and the rotation center X is shortened, and therefore, the pelvis rotation torque is reduced, and as a result, the force required for rotation of the lower body side is reduced. Therefore, it is preferable to set the inclination angle θ 2 so that the supine position stability and the ease of turning (rotation) can be both obtained. Specifically, the inclination angle θ 2 is preferably less than 35 degrees, more preferably 5 to 20 degrees, and particularly preferably 10 to 15 degrees, when the 2 nd inclined portion 42 is formed of a planar inclined surface as in the present embodiment. When the 2 nd inclined part 42 is formed by a stepped structure without being formed by a flat surface as in the present embodiment, the inclination angle θ 2 is set to an angle as follows: an end portion of the 2 nd support surface 41 in the cross-sectional view is set as an inclination starting point, the inclination starting point and a top end of the lowermost step portion constituting the 2 nd inclined portion 42 are connected by a shortest straight line, a plane including the shortest straight line is set as an inclined surface, and an angle of the inclined surface with respect to a horizontal plane is set as an inclination angle θ 2. When the 2 nd inclined part 42 is formed of a curved surface structure, the inclination angle θ 2 is set to an angle as follows: a start point of the inclination of the end of the 2 nd support surface 41 and an end point of the inclination of the bottom surface end of the 2 nd pad 4 (bottom surface end of the 2 nd inclined portion 42) in the cross-sectional view are connected by a shortest straight line, a plane including the shortest straight line is used as an inclined surface, and an angle of the inclined surface with respect to a horizontal plane is set as an inclination angle θ 2. When the inclination angle of the 2 nd inclined part 42 is configured to be gradually (continuously or discontinuously) changed in the longitudinal direction of the 2 nd pad 4, the inclination angle θ 2 is an angle of the inclined surface of the portion supporting the pelvic peripheral portion PA of the user B.

The turning-over assisting pad 2 of the present embodiment is designed to facilitate turning-over in accordance with the intended turning-over type by combining the set values of the length W1 of the 1 st supporting surface 31 of the 1 st pad 3 in the width direction and the inclination angle θ 1 of the 1 st inclined portion 32, and the length W2 of the 2 nd supporting surface 41 of the 2 nd pad 4 in the width direction and the inclination angle θ 2 of the 2 nd inclined portion 42. Therefore, the following description will be given of the relationship between the respective configurations of the 1 st pad 3 and the 2 nd pad 4 with respect to the turn assist pad 2 of the present embodiment.

In the turn-over assisting pad 2 of the present embodiment, the inclination angle θ 1 of the 1 st inclined part 32 of the 1 st pad 3 with respect to the horizontal plane is different from the inclination angle θ 2 of the 2 nd inclined part 42 of the 2 nd pad 4 with respect to the horizontal plane. By making the inclination angle θ of the inclined portions of the respective pads different, the turning load reduction action can be appropriately adjusted on the upper body side and the lower body side, and the turning assisting pad 2 according to the muscle strength, body shape, turning type, and the like of the user B can be obtained. Further, from the viewpoint of promoting mainly the bending-type turning-over, it is preferable that the inclination angle θ 1 of the 1 st inclined portion 32 of the 1 st mat 3 is larger than the inclination angle θ 2 of the 2 nd inclined portion 42 of the 2 nd mat 4 (θ 1 > θ 2). This enhances the action of promoting the rotation of the upper body as a starting point of the turning-over operation, and at the same time, enhances the stability of the lower body in the supine posture, and promotes the turning-over operation in which the rotation of the pelvis is linked slowly. Specifically, the turning-over assistance pad 2 shown in fig. 1 is not particularly limited, and the inclination angle θ 1 of the 1 st inclined portion 32 is 15 degrees and the inclination angle θ 2 of the 2 nd inclined portion 42 is 10 degrees.

In the turn-over assisting pad 2 of the present embodiment, the length W1 in the width direction of the 1 st supporting surface 31 of the 1 st pad 3 and the length W2 in the width direction of the 2 nd supporting surface 41 of the 2 nd pad 4 may be formed to be substantially the same length as the turn-over assisting pad 2 shown in fig. 4, but it is preferable that the width W1 of the 1 st supporting surface is formed to be wider than the width W2 of the 2 nd supporting surface (W1 > W2). Thus, the inclined portion of the second cushion 4 on the lower body side is positioned closer to the center in the width direction of the turning-over assisting cushion 2 than the first cushion 3 on the upper body side, and the start timing of the rotation of the pelvis is earlier, so that the rotation operation of the upper body and the rotation operation of the lower body side are linked with a lower torque, and the self-turning-over is facilitated. Specifically, the turning assistance pad 2 shown in fig. 1 is not particularly limited, and the width W1 of the 1 st support surface 31 is 25cm, and the width W2 of the 2 nd support surface 41 is 13cm. Depending on the type of turning to be promoted, etc., the width W1 of the 1 st support surface may be narrower than the width W2 of the 2 nd support surface (W1 < W2).

Fig. 4 shows another example of the turnover assisting pad 2 according to the present embodiment in which the inclination angle θ 1 of the 1 st inclined portion 32 of the 1 st pad 3 is different from the inclination angle θ 2 of the 2 nd inclined portion 42 of the 2 nd pad 4 (θ 1 ≠ θ 2). In the turn-over assisting pad 2 shown in fig. 4, when the width W1 of the 1 st supporting surface 31 of the 1 st pad 3 and the width W2 of the 2 nd supporting surface 41 of the 2 nd pad 4 are formed to be substantially the same length (W1 = W2), the inclination angle θ 1 of the 1 st inclined part 32 and the inclination angle θ 2 of the 2 nd inclined part 42 are made different from each other, and therefore, the height H1 of the 1 st supporting surface 31 is formed to be higher than the height H2 of the 2 nd supporting surface 41 (H1 > H2). As a result, the inclination angle θ 1 of the 1 st inclined part 32 of the 1 st pad 3 is larger than the inclination angle θ 2 of the 2 nd inclined part 42 of the 2 nd pad 4 (θ 1 > θ 2). Accordingly, since a step is generated between the 1 st supporting surface 31 of the 1 st pad 3 on the upper body side and the 2 nd supporting surface 41 of the 2 nd pad 4 on the lower body side, a portion from the hip to the lumbar region of the user B is supported along the step, so that a natural sleeping posture is easily obtained, and when the user B turns over, the step facilitates the change in the rotation of the pelvis, and the start of the rotation operation of the lower body side is promoted. Therefore, the rotation of the upper body and the rotation of the lower body can be linked easily, and the self-turning can be facilitated. In fig. 4, an example is shown in which the width W1 of the 1 st supporting surface 31 and the width W2 of the 2 nd supporting surface 41 are substantially the same length (W1 = W2), but the present invention is not limited thereto, and the width W1 of the 1 st supporting surface may be formed to be wider than the width W2 of the 2 nd supporting surface (W1 > W2), or may be formed to be narrower (W1 < W2).

The 1 st pad 3 and the 2 nd pad 4 constituting the turn-over assisting pad 2 according to the present invention are each formed of the cushion material having the above-described predetermined thickness (height). As the 1 st cushioning material forming the 1 st pad 3, one having the following degrees of hardness is appropriately selected: the user is significantly deformed in the thickness direction in the state of sleeping in the supine position, but the inclination of the 1 st inclined part 32 is not largely deformed. The 1 st pad 3 may be obtained by combining the 1 st supporting surface 31 and the 1 st inclined portion 32 constituting the 1 st pad 3, which are formed of cushioning materials having different hardness. In this case, it is preferable to select a cushioning material softer than the cushioning material forming the 1 st inclined portion 32 as the cushioning material forming the 1 st support surface 31, so that the body pressure dispersion of the 1 st support surface 31 is good, the body of the user B in contact with the 1 st support surface 31 can be supported softly, and the distance L between the contact point G and the rotation center X is kept short without the 1 st inclined portion 32 sinking the shoulder S of the user excessively, thereby promoting the rotation operation of the upper body. Further, with respect to any one of the 1 st seating surface 31 and the 1 st inclined portion 32, a plurality of different cushioning materials may be combined to obtain respective corresponding portions, for example, a plurality of cushioning materials may be stacked to obtain a portion corresponding to the 1 st seating surface 31, or a portion corresponding to the 1 st inclined portion 32, or a portion corresponding to the shoulder portion SA may be formed by combining a different cushioning material with another portion. When the 1 st supporting surface 31 and the 1 st inclined portion 32 constituting the 1 st pad 3 are formed of the same cushion material, the 1 st supporting surface 31 may be subjected to slit processing or the like to reduce the apparent hardness and soften the same.

As the 2 nd cushion material forming the 2 nd pad 4, one having the following degrees of hardness is appropriately selected: the user is significantly deformed in the thickness direction in the state of sleeping in the supine position, but the inclination of the 2 nd inclined part 42 is not largely deformed. The 2 nd supporting surface 41 and the 2 nd inclined portion 42 constituting the 2 nd pad 4 may be formed of cushioning materials having different hardness, respectively, and the 2 nd pad 4 may be obtained by combining these materials. In this case, it is preferable to select a cushioning material softer than the cushioning material forming the 2 nd inclined portion 42 as the cushioning material forming the 2 nd support surface 41, so that the body pressure dispersion of the 2 nd support surface 41 is good, the body of the user B in contact with the 2 nd support surface 41 can be supported softly, and at the same time, the 2 nd inclined portion 42 does not sink the portion in contact with the pelvic peripheral portion PA of the user excessively during the pelvic rotating operation, and the distance L between the contact point G and the rotation center X is kept short, thereby promoting the lower half body rotating operation. Further, it is also possible to combine a plurality of different cushioning materials to obtain the corresponding portions of either the 2 nd supporting surface 41 or the 2 nd inclined portion 42. For example, a plurality of cushioning materials may be stacked to obtain a portion corresponding to the 2 nd supporting surface 41 or a portion corresponding to the 2 nd inclined portion 42, and the pelvic peripheral portion PA may be formed by combining different cushioning materials with other portions. When the 2 nd supporting surface 41 and the 2 nd inclined portion 42 constituting the 2 nd pad 4 are formed of the same cushion material, the apparent hardness may be reduced and softened by slit processing or the like of the 2 nd supporting surface 41.

The 1 st and 2 nd cushioning materials are not particularly limited as long as they have the above hardness and have cushioning properties, and a resin foam, a three-dimensional network structure, and a cotton molded body can be suitably used, and a resin foam is more preferable from the viewpoint of easiness of handling and processing. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone. The 1 st and 2 nd buffer materials may be the same material or different materials.

In the present embodiment, as described above, the 1 st pad 3 and the 2 nd pad 4 are formed of different cushion materials. Therefore, the 1 st pad 3 and the 2 nd pad 4 may be detachably fixed to the abutting surfaces of the two pads by engaging means such as a surface fastener or may be fixed by an adhesive or the like so that the arrangement of the two pads is not deviated. In addition, the mattress or the mat on which the turning assisting pad 2 is placed may be formed by fixing the 1 st pad 3 and the 2 nd pad 4 to the base layer 6 described below by an engaging means or an adhesive, and in this case, the 1 st pad 3 and the 2 nd pad 4 may be arranged with a predetermined gap therebetween. When the 1 st pad 3 and the 2 nd pad 4 are formed of the same cushion material, the 1 st pad 3 and the 2 nd pad 4 may be formed integrally.

The turn assisting pad 2 in the present embodiment is composed of the 1 st pad 3 and the 2 nd pad 4, and at least 13 rd pad made of a cushioning material having a predetermined thickness may be provided between the 1 st pad 3 and the 2 nd pad 4, or on the head side of the 1 st pad 3 and the foot side of the 2 nd pad 4. The 3 rd pad for supporting the head, waist or feet of the user B is mainly provided, and the cushion material for supporting the head, waist or feet can be selected according to the preference or body type of the sleep comfort of the user B, so that the turning assisting pad 2 for improving the sleep comfort can be obtained.

Fig. 5 shows another example of the turning-over assisting pad 2 of the present embodiment in which the 3 rd pad is provided on the foot side of the 2 nd pad 4. When the 3 rd pad of the turn assisting pad 2 provided on the foot side of the 2 nd pad 4 supports the lower limb, the 3 rd pad has the same structure as the 1 st pad 3. That is, the 3 rd pad includes the 1 st supporting surface 31 and the 1 st inclined portion 32 of the 1 st pad 3. In this way, by making the structure of the first pad 3 the same as that of the second pad 3, the effect of the present invention can be obtained regardless of which direction the user sleeps in when using the turn-over assisting pad 2 in the longitudinal direction.

Next, a method of using the turning-over assisting pad 2 according to the present embodiment will be described with reference to fig. 6. First, as shown in fig. 6 (a), the user B takes a supine sleeping posture on the turn-over assisting mat 2. At this time, the upper half of the body of the user B is supported by the 1 st pad 3, and the lower half of the body is supported by the 2 nd pad 4, so that the shoulder portion SA including the shoulder S of the user B is positioned to face the 1 st inclined portion 32 of the 1 st pad 3, and the pelvic peripheral portion PA of the greater trochanter including the femur of the user B is positioned to face the 2 nd inclined portion 42 of the 2 nd pad 4, thereby adjusting the lying position of the user B. In this state, the 1 st support surface 31 stably supports the back portion centered on the head and the spine, and the 1 st support surface 32 stably supports the hip portion centered on the sacrum of the lower body.

Next, in the case of performing the bending rotation type turning, as shown in fig. 6 (B) to 6 (d), when the user B tries to rotate the upper body in the turning direction, the shoulder portion SA is supported by the 1 st inclined portion 32. In this way, when the user B performs the turning operation, the contact point G between the shoulder portion SA of the user positioned in the turning direction and the 1 st inclined portion 32 is closer to the body axis X of the user, so that the force required for the rotation of the upper body is reduced, and the rotation of the upper body is facilitated. Subsequently, as shown in fig. 6 (c) to 6 (e), the rotation operation of the lower body side is performed in conjunction with the rotation operation of the upper body. More specifically, in the turn-over assisting pad 2 according to the present embodiment, since the width W2 of the 2 nd supporting surface 41 is narrower than the width W1 of the 1 st supporting surface 31, the 2 nd inclined portion 42 of the 2 nd pad 4 on the lower body side is positioned at a position closer to the center in the width direction of the turn-over assisting pad 2, and the rotation of the pelvis is started at a low torque at an early timing. Therefore, as shown in fig. 6 (c), when the user B performs the rotation operation of the upper body side, the rotation operation of the pelvis which is brought into contact with the 2 nd inclined part 42 of the turning-over assisting pad 2 is started, and the rotation operation of the 2 nd inclined part 42 is performed. This makes it easier to turn over the body by itself because the rotation of the upper body is interlocked with the rotation of the lower body. As shown in fig. 6 (d), when the user B rotates the pelvis in the turning direction, the distance from the contact point G between the pelvis peripheral portion PA of the user in the turning direction and the 2 nd inclined portion 42 to the body axis X of the user becomes shorter because the pelvis peripheral portion PA is supported by the 2 nd inclined portion 42 toward the greater trochanter of the femur of the user B which requires the most power during the rotation. As a result, the force required for rotating the pelvis is reduced, and the lower body is easily rotated, whereby the turning-over is completed as shown in fig. 6 (e). In the case of the stretching rotation type turning-over, the order of the interlocking of the lower body and the upper body is reversed, but the action of the 1 st pad 3 on the rotation of the upper body and the action of the 2 nd pad 4 on the rotation of the lower body are the same as in the case of the bending rotation type.

Next, the turning-over assisting pad 20 according to embodiment 2 will be described. As shown in fig. 7, the turn-over assisting pad 20 according to the present embodiment is composed of a 1 st pad 30 on which the upper body side of the user is placed and a 2 nd pad 40 on which the lower body side of the user is placed, and the 1 st pad 30 and the 2 nd pad 40 are arranged in a line in the height direction. The 1 st pad 30 for placing the upper half of the user includes: a 1 st supporting surface 310 formed to be substantially flat and extending in a longitudinal direction (height direction) at a widthwise central portion thereof; and a 1 st inclined portion 320 inclined downward outward from the end portion of the 1 st supporting surface 310 in the longitudinal direction to form a pair of inclined surfaces. Also, the 2 nd pad 40 includes: a 2 nd support surface 410 formed to be substantially flat and extending in a longitudinal direction (height direction) at a widthwise central portion thereof; and a 2 nd inclined part 420 inclined outward downward from the end of the 2 nd support surface 410 in the longitudinal direction to form a pair of inclined surfaces.

Next, the relationship between the respective configurations of the 1 st pad 30 and the 2 nd pad 40 of the turn assist pad 20 of the present embodiment will be described with reference to fig. 7. In the turning-over assistant pad 20 of the present embodiment, the inclination angle θ 10 of the 1 st inclined part 320 of the 1 st pad 30 with respect to the horizontal plane and the inclination angle θ 20 of the 2 nd inclined part 420 of the 2 nd pad 40 with respect to the horizontal plane are formed to be substantially equal to each other. Further, the length W10 in the width direction of the 1 st supporting surface 310 of the 1 st pad 30 and the length W20 in the width direction of the 2 nd supporting surface 410 of the 2 nd pad 40 are configured such that the width W1 of the 1 st supporting surface is wider than the width W2 of the 2 nd supporting surface (W1 > W2). Thus, the inclined portion of the second cushion 40 on the lower body side is positioned closer to the center in the width direction of the turning-over assisting cushion 20 than the first cushion 30 on the upper body side, and when the pelvis is to be rotated, the pelvic peripheral portion in the turning-over direction is promptly brought into contact with and supported by the second inclined portion 420, and the timing at which the lower body starts to rotate at a low torque is set in advance. Therefore, when the user B performs the turning-over operation of the bending rotation type, the start of the pelvic rotation operation after the upper body side rotation is promoted. Further, when the stretching-rotating type turning-over operation is performed, the rotation of the pelvis is smoothly started, and the rotation is easily linked with the rotation of the upper half body side. Therefore, the rotation of the upper body and the rotation of the lower body are smoothly linked, and the torques of the rotation of the upper body and the lower body are well balanced, so that the self-help turning is easy.

Fig. 8 shows another example of the turn assisting pad 20 according to the present embodiment. In the turn assisting pad 20 shown in fig. 7, when the height H10 of the 1 st supporting surface 310 of the 1 st pad 30 and the height H20 of the 2 nd supporting surface 410 of the 2 nd pad 40 are formed to be substantially the same height (H10 = H20), in another example shown in fig. 8, the height H10 of the 1 st supporting surface 310 is formed to be higher than the height H20 of the 2 nd supporting surface 410 (H1 > H2). Accordingly, since a step is generated between the 1 st supporting surface 310 of the 1 st pad 30 on the upper body side and the 2 nd supporting surface 410 of the 2 nd pad 40 on the lower body side, a portion from the hip to the lumbar region of the user B is supported along the step, so that a natural sleeping posture can be easily obtained, and the start of the pelvic rotation operation is further promoted by cooperation between the step and the step formed between the 1 st inclined portion 320 of the 1 st pad 30 and the 2 nd inclined portion 420 of the 2 nd pad 40 after the upper body side rotates during the rolling-over operation of the user B. Therefore, the rotation of the upper body is interlocked with the rotation of the lower body, and the body can be easily turned over by itself.

Other descriptions regarding the 1 st pad 30 and the 2 nd pad 40 constituting the turn assist pad 20 in the present embodiment and other descriptions regarding the 3 rd pad and the like are the same as the 1 st pad 3 and the 2 nd pad 4 and the like in the above-described 1 st embodiment, and the operational effects are also the same.

Next, the turning-over assisting pad 21 according to embodiment 3 will be described. As shown in fig. 9, the turning-over assisting mat 21 according to the present embodiment is composed of a 1 st mat 301 on which the upper half of the user is placed and a 2 nd mat 401 on which the lower half of the user is placed, and the 1 st mat 301 and the 2 nd mat 401 are arranged in a line in the height direction. The 1 st pad 301 on which the upper half of the user is placed includes: a 1 st support surface 311 extending in the longitudinal direction (height direction) at the widthwise center thereof and formed as a substantially flat surface; and a 1 st inclined portion 321 inclined outward and downward from the end portion of the 1 st supporting surface 311 in the longitudinal direction to form a pair of inclined surfaces. Also, the 2 nd pad 401 includes: a 2 nd support surface 411 formed to be substantially flat and extending in a longitudinal direction (height direction) at a widthwise central portion thereof; and a 2 nd inclined portion 421 inclined outward and downward from the end portion of the 2 nd supporting surface 411 in the longitudinal direction to form a pair of inclined surfaces.

Next, the relationship between the respective configurations of the 1 st pad 301 and the 2 nd pad 401 in the turn-over assisting pad 21 of the present embodiment will be described with reference to fig. 9. In the turn-over assisting pad 21 of the present embodiment, the inclination angle θ 11 of the 1 st inclined portion 321 of the 1 st pad 301 with respect to the horizontal plane and the inclination angle θ 21 of the 2 nd inclined portion 421 of the 2 nd pad 401 with respect to the horizontal plane are formed to be substantially equal to each other. The width W11 of the 1 st supporting surface 311 of the 1 st pad 301 is substantially the same as the width W21 of the 2 nd supporting surface 411 of the 2 nd pad 401. The height H11 of the 1 st supporting surface 311 of the 1 st pad 301 and the height H21 of the 2 nd supporting surface 411 of the 2 nd pad 401 are configured such that the height H11 of the 1 st supporting surface 311 is higher than the height H21 of the 2 nd supporting surface 411 (H1 > H2). Accordingly, since a step is generated between the 1 st supporting surface 311 of the 1 st pad 301 on the upper body side and the 2 nd supporting surface 411 of the 2 nd pad 401 on the lower body side, a portion from the hip to the lumbar region of the user B is supported along the step, so that a natural sleeping posture can be easily obtained, and at the same time, when the user B performs a turning-over operation, the start of the pelvic rotation operation is promoted by cooperation between the step and the step formed between the 1 st inclined portion 321 of the 1 st pad 301 and the 2 nd inclined portion 421 of the 2 nd pad 401 after the upper body side rotates. Therefore, the rotation of the upper body is interlocked with the rotation of the lower body, and the self-help turning can be facilitated.

Other descriptions of the 1 st pad 301 and the 2 nd pad 401 constituting the turn-over assisting pad 21 in the present embodiment and other descriptions of the structures are the same as those of the 1 st pad 3 and the 2 nd pad 4 in the above-described 1 st embodiment, and the operational effects are also the same.

Next, the turning-over assisting pad 22 according to embodiment 4 will be described. As shown in fig. 10, the turning-over assisting mat 22 according to the present embodiment is composed of 21

st mats

302 and 12 nd mats 402, and is configured to be arranged in a row in the height direction in the order of the 1 st mat 302, the 2 nd mat 402, and the 1 st mat 302. The 1 st pad 302 for placing the upper half of the body or the foot of the user includes: a 1 st support surface 312 extending in the longitudinal direction (height direction) at the widthwise center thereof and formed as a substantially flat surface; and a 1 st inclined portion 322 inclined outward in a stepwise manner from an end portion in the longitudinal direction of the 1 st supporting surface 312 to form a pair of step portions. The second pad 402 on which the user's hip part is placed includes: a 2 nd support surface 412 formed to be a substantially flat surface extending in the longitudinal direction (height direction) at the widthwise center portion thereof; and a 2 nd inclined portion 422 inclined outward in a stepwise manner from the end portion in the longitudinal direction of the 2 nd support surface 412 to form a pair of step portions.

The 1 st support surface 312 of the 1 st pad 302 according to this embodiment is configured to support at least a part of the back of the body of the user B in the supine posture. The size of the 1 st support surface 312 in the present embodiment is formed as follows: the length W12 in the width direction was 39cm, the length in the length direction (height direction) was 65cm, and the height H12 (thickness of the cushioning material at the 1 st support surface 312 portion) was 4cm, and the back support was designed to support the head and the spine of the user B in the supine posture. Since the length W12 in the width direction of the 1 st support surface 312 is required to be arranged so that the shoulder S of the user B in the supine posture faces the 1 st inclined part 322 on the outer side of the 1 st support surface 312 as described above, the length W12 in the width direction of the 1 st support surface 312 is formed to be equal to or less than the shoulder width SW of the user B, preferably equal to or less than the acromion width. Since the 1 st pad 302 of the present embodiment is disposed on both sides of the longitudinal end of the 2 nd pad 402, the turning assisting pad 22 can be used regardless of the direction of the user, and the 1 st supporting surface 312 of the 1 st pad 302 supports the head, the back around the spine, and the feet of the user B.

As shown in fig. 10, the pair of 1 st inclined portions 322 of the 1 st pad 302 in the present embodiment is designed to extend over the entire length of the 1 st support surface 312, and is formed to support the entire shoulders and upper arms of the user B during the turning-over operation. The 1 st inclined part 322 in the present embodiment is formed of 1 step, but may have a multi-step structure formed of 2 or more steps, or may have a structure in which the width or gradient of each step changes. By adjusting the width, gradient, number of stepped portions, and the like of these stepped portions, the inclination angle θ 12 of the 1 st inclined portion 322 described below can be adjusted to an appropriate angle, and the ease of rotation of the upper half can be adjusted more finely in accordance with the turning pattern, the body size of the user, and the like.

The inclination angle θ 12 of the 1 st inclined portion 322 of the 1 st pad 302 in the present embodiment with respect to the horizontal plane is an angle as follows: as shown in fig. 10 (b), the starting point of the inclination of the end portion of the 1 st supporting surface 312 in the cross-sectional view and the top end of the lowermost step portion constituting the 1 st inclined portion 322 are connected by the shortest straight line, a plane including the shortest straight line is used as an inclined surface, and the angle of the inclined surface with respect to the horizontal plane is set as an inclination angle θ 12. When the inclination angle θ 12 is increased, the distance L between the contact point G of the shoulder portion SA of the user B and the rotation center X is shortened, and therefore, the force required for rotating the upper body is reduced. Therefore, it is preferable to set the inclination angle θ 12 so as to achieve both the stability of the supine position contributing to the comfort of sleep and the ease of turning (turning). Specifically, as in the present embodiment, the inclination angle θ 12 is preferably less than 40 degrees, more preferably 5 to 30 degrees, and particularly preferably 10 to 20 degrees when the 1 st inclined portion 322 is formed of a stepped inclined surface. Even when the height and width of each step portion constituting the 1 st inclined portion 322 are not constant, the inclination angle θ 12 is set to an angle as follows: a starting point of the inclination of the end portion of the 1 st supporting surface 312 and a top end of the lowermost step portion constituting the 1 st inclined portion 322 in the cross-sectional view are connected by a shortest straight line, a plane including the shortest straight line is defined as an inclined surface, and an angle of the inclined surface with respect to a horizontal plane is defined as an inclination angle θ 12.

The 2 nd support surface 412 of the 2 nd pad 402 of the present embodiment is configured to support at least a part of the waist and hip of the body of the user B in the supine position. The size of the 2 nd support surface 412 in the present embodiment is: the support member has a width-direction length W22 of 27cm, a length-direction (height-direction) length of 55cm, and a height H22 (thickness of the cushion material at the 2 nd support surface 412) of 4cm, and is designed to support the lumbar region around the sacrum of the user B in a supine position. Since the length W22 in the width direction of the 2 nd support surface 412 needs to be arranged such that the greater trochanter of the femur of the user B in the supine posture faces the 2 nd inclined part 422 on the outer side of the 2 nd support surface 412 as described above, the length W22 in the width direction of the 2 nd support surface 412 is formed to be equal to or less than the pelvic width PW of the user B.

As shown in fig. 10, the pair of 2 nd inclined parts 422 of the 2 nd pad 402 in the present embodiment is designed to extend over the entire length of the 2 nd support surface 412 and to form a trochanter for supporting at least the femur of the user B during the turning-over operation. The 2 nd inclined part 422 in the present embodiment is formed by 1 step part, but may have a multi-step structure formed by 2 or more step parts, or may have a structure in which the width or gradient of each step part changes. By adjusting the width, gradient, number of stepped portions, and the like of these stepped portions, the inclination angle θ 22 of the 2 nd inclined portion 422 described below can be adjusted to an appropriate angle, and the degree of difficulty of rotation of the lower body side can be adjusted more finely in accordance with the turning-over mode, the body type of the user, and the like.

The inclination angle θ 22 of the 2 nd inclined portion 422 of the 2 nd pad 402 in the present embodiment with respect to the horizontal plane is an angle as follows: as shown in fig. 10 (c), the starting point of the inclination of the end of the 2 nd support surface 412 in the cross-sectional view and the top end of the lowermost step portion constituting the 2 nd inclined portion 422 are connected by the shortest straight line, a plane including the shortest straight line is used as an inclined surface, and the angle of the inclined surface with respect to the horizontal plane is set as the inclination angle θ 22. When the inclination angle θ 22 is increased, the distance L between the contact point G of the pelvic peripheral portion PA and the rotation center X is shortened, and therefore, the rotation torque of the pelvis is reduced, and as a result, the force required for rotation of the lower body side is reduced. Therefore, it is preferable to set the inclination angle θ 22 so as to achieve both the stability of the supine position and the ease of turning (rotation). Specifically, as in the present embodiment, when the 2 nd inclined part 422 is formed of a stepped inclined surface, the inclination angle θ 22 is preferably less than 30 degrees, more preferably 4 to 20 degrees, and particularly preferably 4 to 10 degrees. Even when the height and width of each step portion constituting the 2 nd inclined portion 422 are not constant, the inclination angle θ 22 is set to an angle as follows: a starting point of the inclination of the end portion of the 2 nd support surface 412 and a top end of the lowermost step portion constituting the 2 nd inclined portion 422 in the cross-sectional view are connected by a shortest straight line, a plane including the shortest straight line is defined as an inclined surface, and an angle of the inclined surface with respect to a horizontal plane is defined as an inclination angle θ 22.

Fig. 11 shows an example in which the configuration of the 2 nd inclined part 422 is changed as another example of the turning-over assist pad 22 of the present embodiment. In the turning-over assistant pad 22 shown in fig. 11, the inclination angle θ 22 of the 2 nd inclined part 422 is designed to be larger than the embodiment of the turning-over assistant pad 22 shown in fig. 10 by shortening the length of the 2 nd inclined part 422 in the width direction. By performing such adjustment, the turning-over assisting pad 22 can be obtained which further improves the ease of turning over the lower body side.

In the turning-over assistance mat 22 of the present embodiment, the inclination angle θ 12 of the 1 st inclined portion 322 of the 1 st mat 302 is formed to be larger than the inclination angle θ 22 of the 2 nd inclined portion 422 of the 2 nd mat 402 (θ 12 > θ 22) mainly from the viewpoint of promoting the turning-over in the curved rotary type. This enhances the action of promoting the rotation of the upper body as a starting point of the turning-over operation, and also enhances the stability of the lower body in the supine posture, thereby promoting the turning-over operation in which the pelvic rotation is linked slowly. Specifically, the turning-over assisting pad 22 shown in fig. 10 and 11 is not particularly limited, and the inclination angle θ 12 of the 1 st inclined part 322 is 10 to 20 degrees, and the inclination angle θ 22 of the 2 nd inclined part 422 is 5 to 15 degrees.

As shown in fig. 10, the turn-over assisting pad 22 of the present embodiment is formed such that the width W12 of the 1 st supporting surface is wider than the width W22 of the 2 nd supporting surface (W1 > W2). Thus, the inclined portion of the No. 2 pad 402 on the hip side is positioned closer to the center in the width direction of the turning-over assisting pad 22 than the No. 1 pad 302 on the upper body side, and the rotation start timing of the pelvis is earlier, so that the rotation operation of the upper body and the rotation operation of the lower body side are linked with a lower torque, and the self-turning-over is easier. Specifically, the turning assistance pad 22 shown in fig. 10 and 11 is not particularly limited, and the width W12 of the 1 st support surface 312 is 39cm, and the width W22 of the 2 nd support surface 412 is 27cm.

The 1 st pad 302 and the 2 nd pad 402 constituting the turn-over assisting pad 22 according to the present invention are formed of a cushion material having a predetermined thickness (height). The 1 st supporting surface 312 and the 1 st inclined portion 322 constituting the 1 st pad 302 may be formed of the same cushioning material, but are preferably formed of cushioning materials having different hardness, respectively, and the 1 st pad 302 is obtained by combination. Fig. 10 shows an example in which the 1 st supporting surface 312 and the 1 st inclined portion 322 constituting the 1 st pad 302 are integrally formed of the same cushion material, and fig. 11 shows an example in which the 1 st supporting surface 312 and the 1 st inclined portion 322 constituting the 1 st pad 302 are formed of different cushion materials. Further, even with respect to any one of the 1 st supporting surface 312 and the 1 st inclined portion 322, a plurality of different cushioning materials may be combined to obtain respective corresponding portions, for example, a plurality of cushioning materials may be stacked to obtain a portion corresponding to the 1 st supporting surface 312, or a plurality of cushioning materials may be stacked in a stepwise manner to form the 1 st inclined portion 322. Fig. 11 shows an example in which a plurality of cushioning materials are stacked to form the 1 st support surface 312.

As for the 2 nd pad 402, the 2 nd supporting surface 412 and the 2 nd inclined part 422 may be formed of the same cushion material as the 1 st pad 302, or may be formed of cushion materials having different hardness, respectively, and the 2 nd pad 402 may be obtained by combination. Fig. 10 shows an example in which the 2 nd supporting surface 412 and the 2 nd inclined portion 422 constituting the 2 nd pad 402 are integrally formed of the same cushion material, and fig. 11 shows an example in which the 2 nd supporting surface 412 and the 2 nd inclined portion 422 constituting the 2 nd pad 402 are formed of different cushion materials. Further, it is also possible to combine a plurality of different cushioning materials to obtain the corresponding portions of either the 2 nd supporting surface 412 or the 2 nd inclined portion 422. For example, a plurality of cushioning materials may be stacked to obtain a portion corresponding to the 2 nd supporting surface 412, or a plurality of cushioning materials may be stacked in a stepwise manner to form the 2 nd inclined portion 422. Fig. 11 shows an example in which a plurality of cushioning materials are stacked to obtain the 2 nd supporting surface 412.

The 1 st pad 302 and the 2 nd pad 402 may be formed of the same cushion material or different cushion materials depending on the required physical properties such as ease of operation and body pressure dispersibility in the rotating operation. Fig. 10 shows an example in which the 1 st pad 302 and the 2 nd pad 402 are formed of different cushioning materials as a different body. Fig. 11 shows an example in which the 1 st pad 302 and the 2 nd pad 402 are integrally formed using the same plurality of cushion materials, and specifically, the turning assisting pad 22 is integrally formed by stacking 2 kinds of cushion materials formed into a predetermined shape on top of each other.

Other descriptions of the 1 st pad 302 and the 2 nd pad 402 constituting the turn assisting pad 22 in the present embodiment and other descriptions of the 3 rd pad and the like are the same as the 1 st pad 3 and the 2 nd pad 4 and the like in the above-described 1 st embodiment, and the operational effects are also the same.

Next, the turning-over assisting pad 23 according to embodiment 5 will be explained. As shown in fig. 12, the turning assist pad 23 according to the present embodiment is composed of 21

st pads

303 and 12 nd pads 403, and is configured to be arranged in a row in the height direction in the order of the 1 st pads 303, the 2 nd pads 403, and the 1 st pads 303. The 1 st pad 303 on which the upper half and the feet of the user are placed includes a 1 st support surface 313 which extends in the longitudinal direction (height direction) at the widthwise center portion thereof and is formed as a substantially flat surface. The No. 2 pad 403 on which the user's hip part is placed includes: a 2 nd support surface 413 formed to be substantially flat and extending in the longitudinal direction (height direction) at the center in the width direction; and a 2 nd inclined portion 423 inclined outward in a stepwise manner from the end portion in the longitudinal direction of the 2 nd support surface 413, and forming a pair of step portions. In the present embodiment, the 21 st pads 303 are provided, but it is also possible to configure the 1 st pad 303 for the upper half and the 1 nd pad 403 for the lower half.

The 1 st support surface 313 of the 1 st pad 303 according to this embodiment is configured to support at least a part of the back of the body of the user B in the supine posture. The size of the 1 st support surface 313 in the present embodiment is formed such that: the length W13 in the width direction was 39cm, the length in the length direction (height direction) was 65cm, and the height H13 (thickness of the cushioning material at the 1 st support surface 313) was 3cm, and the instrument was designed to support the head and the back around the spine of the user B in the supine posture. The 1 st support surface 313 is formed as a substantially flat surface in the present embodiment, but may be formed in any shape as long as it can support at least a part of the back of the body of the user B in the supine posture, and the shape is not limited to the flat surface.

The 2 nd support surface 413 of the 2 nd pad 403 according to the present embodiment is configured to support at least a part of the waist and hip of the body of the user B in the supine posture. The size of the 2 nd supporting surface 413 in the present embodiment is formed such that: the support member has a width-direction length W23 of 27cm, a length-direction (height-direction) length of 55cm, and a height H23 (thickness of the cushion material at the 2 nd support surface 413 portion) of 3cm, and is designed to support the sacrum-centered hip of the user B in the supine position. Since the length W23 in the width direction of the 2 nd support surface 413 is required to be arranged so that the greater trochanter of the femur of the user B in the supine posture faces the 2 nd inclined portion 423 on the outer side of the 2 nd support surface 413, the length W23 in the width direction of the 2 nd support surface 413 is set to a width equal to or less than the pelvic width PW of the user B.

As shown in fig. 12, the pair of 2 nd inclined portions 423 of the 2 nd pad 403 in the present embodiment is designed to extend across the entire length of the 2 nd support surface 413, and is formed as a trochanter for supporting at least the femur of the user B during the turning-over operation. The 2 nd inclined portion 423 in the present embodiment is formed of 1 step portion, but may have a multi-step structure formed of 2 or more step portions, or may have a structure in which the width or gradient of each step portion changes. By adjusting the width, gradient, number of stepped portions, and the like of these stepped portions, the inclination angle θ 23 of the 2 nd inclined portion 423 described below can be adjusted to an appropriate angle, and the degree of difficulty of rotation of the lower body side can be adjusted more finely in accordance with the turning-over mode, the body type of the user, and the like. The 2 nd inclined portion 423 is not limited to the stepped structure, and may be formed in an inclined surface shape such as a flat surface or a curved surface as described in the above embodiment.

The inclination angle θ 23 of the 2 nd inclined portion 423 of the 2 nd pad 403 in the present embodiment with respect to the horizontal plane is an angle as follows: as shown in fig. 12 (b), the starting point of the inclination of the end of the 2 nd support surface 413 in the cross-sectional view and the top end of the lowermost step portion constituting the 2 nd inclined portion 423 are connected by the shortest straight line, a plane including the shortest straight line is used as an inclined surface, and the angle of the inclined surface with respect to the horizontal plane is set as the inclination angle θ 23. When the inclination angle θ 23 is increased, the distance L between the contact point G of the pelvic peripheral portion PA and the rotation center X is shortened, and therefore, the rotation torque of the pelvis is reduced, and as a result, the force required for rotation of the lower body side is reduced. Therefore, it is preferable to set the inclination angle θ 23 that can achieve both the supine position stability and the ease of turning (turning). Specifically, as in the present embodiment, when the 2 nd inclined portion 423 is formed of a stepped inclined surface, the inclination angle θ 23 is preferably less than 30 degrees, more preferably 5 to 25 degrees, and particularly preferably 10 to 20 degrees.

To explain the operation related to the use of the turning-over assisting pad 23 according to the present embodiment, in the posture in which the user B sleeps in a supine position, the 1 st pad 303 stably supports the head and the back portion centered on the spine of the user B, and the 2 nd support surface 413 of the 2 nd pad stably supports the lumbar portion centered on the sacrum of the lower body. In addition, when performing the bending rotation type turning with the upper body as the operation starting point, the pelvis is rotated after the upper body is rotated, and when the pelvis is rotated, the 2 nd inclined part 423 supports the trochanter of the femur and the pelvis peripheral part PA such as the ilium located in the vicinity thereof, which require the most power in the turning direction rotation operation. Since the 2 nd inclined portion 423 is inclined downward from the end of the 2 nd support surface 413, the distance between the point at which the pelvis peripheral portion PA such as the trochanter of the femur, which is positioned in the roll-over direction, contacts the 2 nd inclined portion and the body axis of the user becomes shorter, the force required for the rotation of the pelvis becomes smaller, and the rotation of the lower body side linked from the rotation of the pelvis to the rotation of the lower limb portion can be facilitated. This reduces the load of rotation of the lower body, and facilitates turning over. In the case of performing the stretching rotation type turning with the lower half body as the operation starting point, when the pelvis is rotated from the lower half body side, the 2 nd inclined portion 423 supports the greater trochanter of the femur in the turning direction and the pelvis peripheral portion PA of the ilium or the like located in the vicinity thereof. Since the 2 nd inclined part 423 is inclined downward from the end of the 2 nd support surface 413, the distance between the point of contact between the pelvis peripheral part of the trochanter or the like of the femur, which is located in the turning direction, and the 2 nd inclined part 423 and the body axis of the user becomes short, the force required for the rotation of the pelvis becomes small, and the rotation of the lower body side becomes easy.

The 1 st pad 303 and the 2 nd pad 403 constituting the turning assist pad 23 according to the present invention are formed of a cushion material having a predetermined thickness (height). The 2 nd supporting surface 413 and the 2 nd inclined portion 423 constituting the 2 nd pad 403 may be formed of the same cushioning material, or may be formed of cushioning materials having different hardness, and the 2 nd pad 403 may be obtained by combination. Further, it is also possible to combine a plurality of different cushioning materials to obtain the corresponding portions of either the 2 nd supporting surface 413 or the 2 nd inclined portion 423. For example, a plurality of cushioning materials may be stacked to obtain a portion corresponding to the 2 nd supporting surface 413, or a plurality of cushioning materials may be stacked in a stepwise manner to form the 2 nd inclined portion 423. The 1 st pad 303 and the 2 nd pad 403 may be formed of the same cushion material or different cushion materials depending on the required physical properties such as the ease of handling and body pressure dispersibility of the rotating operation. Fig. 12 shows an example in which the 1 st pad 303 and the 2 nd pad 403 are formed of different cushioning materials, and the 1 st pad 303 and the 2 nd pad 403 may be formed integrally of the same plurality of cushioning materials, and as an example, the turning auxiliary pad 23 may be formed by stacking 2 sheet-shaped cushioning materials formed into a predetermined shape one on top of the other.

Other descriptions about the 1 st pad 303 and the 2 nd pad 403 constituting the turning assisting pad 23 in the present embodiment and other descriptions about the 3 rd pad and the like are the same as the 1 st pad 3 and the 2 nd pad 4 and the like in the above-described 1 st embodiment and the 1 st pad 302 and the 2 nd pad 402 and the like in the 5 th embodiment, and the operation and effects thereof are also the same.

Next, a turn-over assisting mattress 1 of the present invention incorporating the turn-over assisting cushion 2 will be described with reference to fig. 13. The turn-over assisting mattress 1 of the present invention is roughly configured such that a base layer 6, a turn-over assisting mattress 2, an end block 7, and an upper layer 5 are laminated in this order from the lower side to the upper side. The turning-over auxiliary pad 2 is placed on the central part of the base layer 6 in the width direction, and the end blocks 7 are placed on both end parts of the base layer 6 in the width direction across the longitudinal direction of the base layer 6 at a predetermined interval from the turning-over auxiliary pad 2. In order to prevent the respective arrangements from being shifted, the members constituting the turn-over assisting mattress 1, such as the base layer 6, the turn-over assisting mattress 2, the end blocks 7, and the upper layer 5, may be fixed by engaging means, an adhesive, or the like to the surfaces where the respective members are in contact with each other.

First, the base layer 6 will be described. The base layer 6 of the turn-over assisting mattress 1 is formed of a relatively hard cushion material capable of stably supporting the body of the user. The base layer 6 in the present embodiment is formed, for example, in the following sizes: the length in the width direction was 91cm, the length in the length direction was 195cm, and the height was 2cm. The hardness of the cushion material of the base layer 6 is preferably equal to or higher than that of the cushion material constituting the 1 st pad 31 and the 2 nd pad 41. The cushioning material for the base layer 6 is not particularly limited as long as it has the above hardness and cushioning properties, and a resin foam, a three-dimensional network structure, and a cotton molded body can be suitably used, and a resin foam is more preferable from the viewpoint of ease of handling and processing. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, foamed silicone, and the like.

Next, the turning-over assisting pad 2 will be explained. The turn-over support mat 2 incorporated in the turn-over support mattress 1 according to the present invention is not limited to the turn-over support mat 2 according to embodiment 1 described above, and may include the 2 nd to 5 th embodiments, and the turn-over support mats according to all the embodiments described above may be used.

Next, the end block 7 will be explained. By arranging the end block 7, the user B can be prevented from rolling over from the turn-over auxiliary pad 2 and falling off from the base layer 6 when the user B turns over, and the turn-over action can be safely carried out on the mattress. The end block 7 in the present embodiment is, for example, formed in the following size: the length in the width direction was 10cm, the length in the length direction was 195cm, and the height was 3cm. Further, since the material of the end block 7 is made of a relatively hard cushion material, when a user grips the end block 7 with his/her hand, the user can effectively grip the end block 7 with his/her hand, and when the user sits on the end block 7, the hip is supported by the concave portions formed by the

inclined portions

32 and 42 of the respective pads and the end block 7, and the end block 7 supports the vicinity of the inner side of the thighs, so that the seat can be easily balanced, and the end seating stability and the standing stability can be obtained. Specifically, the cushioning material of the end block 7 is preferably a material having a hardness of 180 to 440N, more preferably 200 to 300N, and particularly preferably 210 to 250N, as measured in JIS K6401 "flexible polyurethane foam for load bearing". The cushioning material of the end block 7 is not particularly limited as long as it has the above hardness and cushioning properties, and a resin foam, a three-dimensional network structure, and a cotton molded body can be suitably used, and a resin foam is more preferable from the viewpoint of ease of handling and processing. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone.

In the present embodiment, the end block 7 is disposed in a state of being placed on the base layer 6, but the end block 7 may not be disposed on the base layer 6 and may be disposed in a state of being in contact with the end portion in the longitudinal direction of the base layer 6. In this case, the upper surface of the end block 7 needs to protrude from the upper surface of the base layer 6, and therefore the height (thickness) of the end block 7 is formed to be at least higher than the height of the base layer 6.

In the present embodiment, the end blocks 7 are provided at both ends of the base layer 6 in the width direction, but may be provided only at one end. In the present embodiment, the end block 7 is provided across the longitudinal direction of the base layer 6, but may be provided at a part of the longitudinal direction of the base layer 6, for example, only at the center and periphery in the longitudinal direction. In order to improve the shape retention of the turn-over assisting mattress 1, the end blocks 7 may be provided at the ends of the base layer 6 in the width direction.

Next, the upper layer 5 will be explained. As shown in fig. 13, the upper layer 5 is a layer covering the upper surfaces of the turning assistance pad 2, the end blocks 7, and the base layer 6, and is formed of a cushioning material softer than the turning assistance pad 2, the end blocks 7, and the base layer 6. The upper layer 5 in the present embodiment is formed by: the length in the width direction was 91cm, the length in the length direction was 195cm, and the height from the upper surface of the turn-over assisting pad 2 was 6cm. As the cushioning material of the upper layer 5, a material having a hardness of 50 to 160N, more preferably 70 to 150N, and particularly preferably 90 to 140N, as measured according to JIS K6401 "flexible polyurethane foam for load resistance" is preferable from the viewpoint of improving the sleeping comfort and body pressure dispersibility of the user B while maintaining the function and effect of the turn-over assisting pad 2. The cushioning material of the upper layer 5 is not particularly limited as long as it has the above hardness and cushioning properties, and a resin foam, a three-dimensional network structure, and a cotton molded body can be suitably used, and a resin foam is more preferable from the viewpoint of ease of handling and processing. Specific examples of the resin foam include foamed polyurethane, foamed polyolefin, and foamed silicone.

In the present embodiment, as shown in fig. 13 (b) and 13 (c), the upper layer 5 is formed in a flat sheet shape having a constant thickness, and a space surrounded by the end block 7 and the 1 st inclined portion 32 and the 2 nd inclined portion 42 of the turn-up assisting pad 2 is formed between the upper layer 5 and the base layer 6. By forming this space, the rotational force of the 1 st inclined part 32 and the 2 nd inclined part 42 can be adjusted on the upper body side and the lower body side, respectively. In this case, the upper layer 5 is preferably made of a material that can be deformed by stretching so as not to significantly hinder the rotational movement of the shoulder SA or the pelvic periphery PA of the user B. The lower surface side of the upper layer 5 may be formed to be substantially fitted into the above-described space, that is, the space surrounded by the base layer 6, the end block 7, and the 1 st inclined portion 32 and the 2 nd inclined portion 42 of the turning-assist pad 2. Further, the space surrounded by the base layer 6, the end block 7, and the 1 st inclined part 32 and the 2 nd inclined part 42 of the turning assist pad 2 may be formed so as to leave only a part of the space. In addition, a cushioning material different from that of the upper layer 5 may be disposed in the space (the space surrounded by the base layer 6, the end block 7, and the 1 st inclined portion 32 and the 2 nd inclined portion 42 of the turn-over assisting pad 2), and in this case, a cushioning material that is approximately the same as or softer than the cushioning material of the upper layer 5 is preferable. When the

inclined portions

32 and 42 of the turn-up assisting pad 2 are covered by the lamination of the upper layer 5 or the cushion material disposed in the above space, the respective inclination angles of the 1 st inclined portion 32 of the 1 st pad 3 and the 2 nd inclined portion 42 of the 2 nd pad 4 can be designed and adjusted to a large extent even when the effect of the

inclined portions

32 and 42 is low.

In the present embodiment shown in fig. 13, the upper layer 5 covers the upper surfaces of the turning assisting pad 2, the end blocks 7, and the base layer 6, but may be configured not to cover the 1 st supporting surface 31 and the 2 nd supporting surface 41 of the turning assisting pad 2, and these supporting surfaces may be exposed to cover the 1 st inclined portion 32 and the 2 nd inclined portion 42. In this case, the upper layer 5 is arranged to be divided into at least 2. In another embodiment, the upper layer 5 may cover only the 1 st supporting surface 31 and/or the 2 nd supporting surface 41.

The turn-over assisting mattress 1 in the present embodiment is configured by stacking the turn-over assisting mattress 2, the end blocks 7, and the upper layer 5 on the base layer 6, but may be configured by omitting the end blocks 7 or the upper layer 5. Alternatively, the end blocks 7 and the upper layer 5 may be omitted, and the turn-over assisting pad 2 may be laminated only on the base layer 6.

Fig. 14 shows a turn assist mattress 10 according to another embodiment. The turn-over assisting mattress 10 according to the present embodiment is roughly configured such that the turn-over assisting mattress 2 is stacked on the base layer 60. As shown in fig. 14, the base layer 60 in the present embodiment is composed of a 1 st base portion 60a on which the 1 st pad 3 is disposed and a 2 nd base portion 60b on which the 2 nd pad 4 is disposed, and is formed to have different thicknesses (heights). Specifically, the 1 st base body portion 60a is formed thick (high) and the 2 nd base body portion 60b is formed thin (low), so that a step 60c is formed at the boundary between the 1 st pad 3 and the 2 nd pad 4. The height of the 2 nd pad 4 disposed at the lower portion of the step increases from the step to the upper surface of the 2 nd supporting surface 41 of the 2 nd pad 4, and therefore, the descending length of the 2 nd inclined part 42 becomes longer, and the rotation of the lower body side of the user B can be facilitated. However, if the height difference 60c is too high, the turning momentum becomes too large, which is not preferable, and therefore, it is preferable to set the height difference 60c according to the condition such as the inclination angle θ 2 of the 2 nd mat 4. In fig. 14, the base layer 60 is configured such that the 2 nd base segment 60b on which the 2 nd pad 4 is arranged is lower than the 1 st base segment 60a, but the 1 st base segment 60a on which the 1 st pad 3 is arranged may be configured to be lower than the 2 nd base segment 60b, and a large step difference may be provided depending on the condition of the inclination angle θ 1 or the like. The present embodiment can also be applied to the case where the width or height of the 1 st supporting surface 31 of the 1 st pad 3 and the 2 nd supporting surface 41 of the 2 nd pad 4 is changed. The turn-over supporting mattress 10 of the present embodiment is configured only by stacking the turn-over supporting mattress 2 on the base layer 60, but may be configured by stacking the end blocks 7 and/or the upper layer 5.

The present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples.

Examples

Example 1

1. Study on inclination angle and torque value of inclined part of turn-over assisting pad

The inventors regard the turning motion as a rotational motion, as shown in fig. 3, and attempt to quantify the force required for the turning motion with a torque T. The torque T is expressed by a product (T = F × L) of a force F acting in a tangential direction of the rotation circle and a distance L between the contact point G and the rotation center X. Then, a simulator simulating a human body shown in fig. 15 (a) was produced. The simulator has a waist part with a rotation axis connecting an upper body part simulating a shoulder and a chest and a lower body part simulating a hip. The rotation axis of the waist part rotates only the upper half part to a rotation angle of 40 degrees with respect to the lower half part which is still standing, and when the rotation angle exceeds 40 degrees, the rotation of the lower half part is interlocked with the rotation of the upper half part. Weights of 11kg and 16kg were mounted on the shoulder and hip, respectively, and a torque meter (model: WRG3-135, manufactured by WISRETEC) was attached to the tip of the rotation center X. First, in order to confirm the effectiveness of the simulator, when the simulator is placed on a flat surface and a ratchet handle is inserted into one end of a torque meter to rotate the torque meter to measure the torque, a graph line from the torque of the simulator to the completion of turning and a graph line from the myoelectric potential as the biological data to the completion of turning show similar shapes. From the results, the effectiveness of the simulator was confirmed, and the simulator was placed in a predetermined position of the turning-over assist pad to be measured in a state where the user was lying on his back, as shown in fig. 15 (b), and a ratchet handle was inserted into one end of the torque meter to rotate the torque meter to measure the torque. The torque until the upper body part and the lower body part of the simulator lie on their sides, that is, until the completion of turning over, was measured, and the operation of the simulator was investigated. The width W1 of the 1 st supporting surface 31 of the 1 st pad 3 and the width W2 of the 2 nd supporting surface 41 of the 2 nd pad 4 of the turning assistant pad to be measured are set to 25cm, respectively, the height H1 of the 1 st supporting surface 31 (the thickness of the cushion material of the 1 st supporting surface 31 portion) and the height H2 of the 2 nd supporting surface 41 of the 1 st pad 3 (the thickness of the cushion material of the 2 nd supporting surface 41 portion) are set to 3cm, respectively, and only the inclination angles of the 1 st inclined portion 32 and the 2 nd inclined portion 42 are changed, and the inclination angle θ 1 of the 1 st inclined portion 32 and the inclination angle θ 2 of the 2 nd inclined portion 42 are set to the same angle (θ 1= θ 2). The 1 st inclined portion 32 and the 2 nd inclined portion 42 are formed as inclined surfaces constituted by flat surfaces. The inclination angles of the inclined surfaces of the respective inclined portions of the 1 st pad 3 and the 2 nd pad 4 are set to 0 ° (flat surface), 5 °, 10 °, and 15 °. The results are shown in the graph of FIG. 16.

In fig. 16, the ordinate represents the value of the torque (Nm) measured by the torque meter, and the abscissa represents the elapsed time. The hollow circle mark indicates an inclination angle of 0 °, the triangle mark indicates an inclination angle of 5 °, the hollow quadrangle mark indicates an inclination angle of 10 ° and the circle mark indicates an inclination angle of 15 °. The illustration shown on the lower side of the horizontal axis of the figure schematically shows the turning state of the user B corresponding to the movement of the simulator at each time. From this graph, the decrease in the torque value during the rotation of the simulator (during turning) is shown by setting the inclination angle in the direction in which the simulator is rotated, and the effect of significantly reducing the torque is clearly shown by setting the inclination angle to 10 ° or more.

Example 2

2. Study on inclined structure and torque value of turnover auxiliary pad

The simulator used in example 1 above was used to measure the torque associated with turning over operation of the turning-over assist pad 2 (composite inclined structure) shown in embodiment 1 shown in fig. 1 and the turning-over assist pad (simple inclined structure) formed by the first pad and the second pad and having the width of each supporting surface and the inclination angle of each inclined portion respectively matched. In any one of the 1 st inclined portion 32 and the 2 nd inclined portion 42, each inclined portion is formed as an inclined surface formed of a flat surface. The turn-over assisting pad 2 shown in embodiment 1 is composed of a 1 st pad 3 and a 2 nd pad 4, and is formed so that the width of each supporting surface and the inclination angle θ of each inclined portion are different (composite inclined structure). For comparison, the torque related to the turning operation of a flat turning-over assist pad (no inclination) not having the 1 st inclined part 32 and the 2 nd inclined part 42 was also measured. The cushioning materials constituting the respective turn-over assist pads were all the same, and polyurethane foam (product number M3200) of toyoja jia (ningbo) sponge products ltd was used. The results are shown in the graph of FIG. 17.

TABLE 1

In fig. 17, the ordinate represents the value of the torque (Nm) measured by the torque meter, and the abscissa represents the elapsed time. The circle marks indicate a compound-inclined structure, the hollow circle marks indicate a simple-inclined structure, and the hollow quadrangle marks indicate comparative examples (no inclination). The illustration shown on the lower side of the horizontal axis of the figure schematically shows the turning state of the user B corresponding to the movement of the simulator at each time. From this graph, the turning-over assisting pad of the present invention shows that the maximum value of the torque during the turning-over operation is significantly reduced as compared with the flat turning-over assisting pad of the comparative example having no inclined surface. Further, by configuring the turning-over assist pad to be a structure (composite tilting structure) in which the turning-over operation of the upper body and the turning-over operation of the lower body are adjusted individually to be interlocked, that is, by configuring the width W1 of the 1 st supporting surface to be larger than the width W2 of the 2 nd supporting surface and the tilt angle θ 1 of the 1 st tilting portion to be larger than the tilt angle θ 2 of the 2 nd tilting portion, the torque value during the turning-over operation is further reduced overall to the turning-over of the lower body side as well as the turning-over of the upper body side, and the turning-over becomes easy.

Example 3

3. Evaluation of turning-over assist pad according to the present invention

In accordance with the specifications shown in table 2 below and fig. 18 (a) to (e), 5 types of turning-over support pads 3a to 3e were produced, and sensory tests relating to ease of turning over and comfort in sleeping when used as the turning-over support pads were performed. Here, the turn-over assisting pad of example 3a shown in fig. 18 (a) is the turn-over assisting pad 2 of the composite inclined structure (embodiment 1) tested in the above-mentioned example 2, and the turn-over assisting pad of example 3b shown in fig. 18 (b) is the same as the turn-over assisting pad of the simple inclined structure tested in the above-mentioned example 2. The turn-over assisting pad of example 3c shown in fig. 18 (c) corresponds to the turn-over assisting pad 21 described in detail in embodiment 3, the turn-over assisting pad of example 3d shown in fig. 18 (d) corresponds to the turn-over assisting pad 22 described in detail in embodiment 4, and the turn-over assisting pad of example 3e shown in fig. 18 (e) corresponds to the turn-over assisting pad 23 described in detail in embodiment 5. The cushioning materials constituting the turning-over auxiliary pads of examples 3a to 3e were all the same, and polyurethane foam (product number M3200) of toyojajia (nibo) sponge products ltd was used.

The prepared mat was placed on the ground, and 5 males aged 40 to 50 shown in table 3 below were used as subjects, and tests related to the following items were performed. The test method and the evaluation method are as follows.

(1) Turning over property

The subject was turned in a bending rotation motion (head rotation → upper body rotation → pelvic rotation → lower limb rotation) in a state of the supine position (face on the back) in which the center in the width direction of the turning support pad was aligned with the position of the spine and the upper half side of the subject was supported by the 1 st pad and the lower half side was supported by the 2 nd pad, and the ease of turning was evaluated. In example 2, the flat pad without an inclined part used as a comparative example (the same as comparative example 1 described below) was evaluated for each subject as to the ease of turning over based on the ease of turning over, and the flat pad was evaluated as "x" when turning over was very easy, "o" when turning over was easy, "Δ" when turning over was slightly easy, and "x" when turning over was about the same. Of the evaluations of 5 subjects, the most frequent evaluation was used as the evaluation result of turning-over property. When there are a plurality of evaluations, the evaluation of the best quality side is taken as the evaluation result. Similarly, the turning is performed by the stretching and rotating operation (the operation of lower limb rotation → lower limb rotation simultaneously or thereafter, pelvis rotation → upper body rotation → head rotation), and the ease of turning is also evaluated.

(2) Sleep comfort

The center of the turning-over assistance pad in the width direction was aligned with the position of the spine, and the stability of the sleeping posture in the supine position (supine surface) sleeping state in which the upper body side of the subject was supported by the 1 st pad and the lower body side was supported by the 2 nd pad was evaluated. Each subject was evaluated, and evaluated as "good" when the sleeping posture was stable, "fair" when the sleeping posture was slightly unstable, and "x" when the sleeping posture was unstable. Of the evaluations of 5 subjects, the most significant evaluation was taken as the evaluation result of the sleep comfort level. When there are a plurality of evaluations, the evaluation of the best quality side is taken as the evaluation result.

The evaluation results of the turn-over mats 3a to 3e of the present example are shown in fig. 2.

TABLE 2

TABLE 3

Test subject	The times of the year	Sex	Height [ cm ]]	Body weight [ kg]	BMI
						A	50-59 years old	Male sex	174	65	21.5
B	50-59 years old	Male sex	173	67	22.4
						C	50-59 years old	Male sex	168	72	25.5
D	50-59 years old	Male sex	170	65	22.5
						E	40-49 years old	Male sex	172	63	21.3

As is clear from the evaluation results of example 3, the turning-over assisting pad of the present invention improves turning-over property while maintaining stable sleeping comfort. Further, it is understood from the evaluation results of example 3a and example 3d that the turning-over property can be improved and the stability of the sleeping comfort is not different even in any case where the inclined part is in the form of an inclined surface or a step. Further, it is shown from comparison of example 3b with examples 3a, 3c and 3d that turning-over property is improved by the inclination angle θ 1 of the 1 st pad > the inclination angle θ 2 of the 2 nd pad, or the height H1 of the supporting surface of the 1 st pad > the height H2 of the supporting surface of the 2 nd pad.

Comparative example

4. Evaluation of other turning-over assisting pad

4 types of the mats of comparative examples 1 to 4 were prepared in accordance with the specifications shown in Table 4 below and FIGS. 19 (a) to (d), and sensory tests were performed with respect to the ease of turning over and the comfort of sleeping when used as a turning-over aid mat. The 5 subjects, test methods and evaluation methods were the same as in example 3. Here, as shown in fig. 19 (a), the mattress of comparative example 1 is a flat mattress of a conventional product, similar to the flat mattress without an inclined portion used as the comparative example in example 2. The pad of comparative example 2 shown in fig. 19 (b) is a flat pad in which the 1 st pad 3 has an inclined portion and the 2 nd pad does not have an inclined portion, and the width length of the 2 nd pad exceeds the width of the pelvis. In both of the pads of comparative examples 3 and 4 shown in fig. 19 (c) and 19 (d), the inclined portion was completely absent. The cushioning materials constituting the pads of comparative examples 1 to 4 were all the same, and polyurethane foam (product number M3200) of toyojajia (nibo) sponge products ltd was used. The evaluation results of comparative examples 1 to 4 are shown in FIG. 4.

TABLE 4

The evaluation results of example 3 and comparative examples 1 to 4 show that the provision of the present invention improves turning-over performance while maintaining stable sleep comfort. Further, as is clear from the results of comparative example 3 and comparative example 2, even if the 1 st pad that acts on the rotation operation of the upper body side has an inclined portion, the turning-over performance is lowered if the 2 nd pad that acts on the rotation operation of the lower body side does not have an inclined portion. As is clear from comparative example 3 or comparative example 4, the pad without the inclined portion has a decreased holding stability against the outside body from the vicinity of the end portion and the end portion of the supporting surface of each pad, and thus the sleep comfort is deteriorated.

Example 4

5. Evaluation of turning-over support mattress according to the present invention

3 types of turning-over support mattresses 4a to 4c were produced in accordance with the specifications shown in table 5 below and fig. 20 (a) to (c), respectively, and the produced mattresses were set on the ground to perform sensory tests relating to ease of turning over and comfort in sleep when used as turning-over support mattresses. The 5 subjects, test methods and evaluation methods were the same as in example 3.

The turn-over support mattress of example 4a shown in fig. 20 (a) was used as the turn-over support mattress produced in example 3a, the turn-over support mattress of example 4b shown in fig. 20 (b) was used as the turn-over support mattress produced in example 3d, and the turn-over support mattress of example 4c shown in fig. 20 (c) was used as the turn-over support mattress produced in example 3 e. Any one of the turning-over auxiliary mattresses is manufactured by laminating a base layer 6, respective turning-over auxiliary pads, end blocks 7, and an upper layer 5 in this order from the lower side to the upper side, the turning-over auxiliary pad 2 being placed on the central portion of the base layer 6 in the width direction, and the end blocks 7 being placed on both end portions of the base layer 6 in the width direction with a predetermined interval from the turning-over auxiliary pad 2 and spanning the longitudinal direction of the base layer 6. As the cushioning material constituting the upper layer 5, a polyurethane foam (product No. MF-20, manufactured by INOAC) having a width of 91cm, a length of 185cm in the height direction and a thickness of 7cm was used, and as the cushioning material constituting the base layer 6, a polyurethane foam (product No. MF-50, manufactured by INOAC) having a width of 91cm, a length of 185cm in the height direction and a thickness of 2cm was used. Further, as the cushion material constituting the end block 7, polyurethane foam (product No. MF-55, product No. INOAC) having a size of 10cm, 185cm in the height direction and 3cm in thickness was used in example 4a, and polyurethane foam (product No. MF-55, product No. INOAC) having a size of 10cm, 185cm in the height direction and 4cm in thickness was used in examples 4b and 4 c. The evaluation results of examples 4a to 4c are shown in Table 5.

TABLE 5

As is clear from the evaluation results of examples 4a to 4c, the mattress to which the turning-over assist pad of the present invention is applied has stable sleeping comfort and is excellent in turning-over property. Thus, even when the upper layer 5 having a relatively large thickness is laminated on the top surface of the turning assisting pad, the effect of improving turning performance is not lost.

The present invention is not limited to the above-described embodiments, and various modifications of design within the scope not departing from the gist of the invention described in the claims are also included in the technical scope.

Description of the symbols

1. 10-turn-over auxiliary mattress

2. 20, 21, 22, 23-turn-over auxiliary pad

3. 30, 301, 302, 303-1 st pad

31. 310, 311, 312, 313-1 st support surface

32. 320, 321, 322-1 st inclined part

4. 40, 401, 402, 403, 4' -2 nd pad

41. 410, 411, 412, 413-No. 2 support surface

42. 420, 421, 422, 423-2 nd inclined part

5-upper layer

6. 60-substrate layer

60 a-No. 1 base part

60 b-2 nd base part

60 c-difference in height

7-end block

W1, W10, W11, W12, W13-width of the 1 st support surface

W2, W20, W21, W22, W23-width of the 2 nd support surface

H1, H10, H11, H12, H13-height of the 1 st support surface

H2, H20, H21, H22, H23-height of the 2 nd support surface

Angle of inclination theta 1, theta 10, theta 11, theta 12-1 st inclined part

Angle of inclination of theta 2, theta 20, theta 21, theta 22, theta 23-2 nd inclined part

B-user

S-shoulder of user

SW-shoulder width

SA-shoulder edge part

P-anterior superior iliac spine of pelvis of user

Width of the PW-pelvis

PA-pelvic periphery

F-forces acting in the tangential direction of the circle of revolution

Distance of L-contact point from center of rotation

G-contact

X-center of rotation (body axis)

Claims

1. A turnover auxiliary pad is carried on a mattress, a mattress or a paved object for use, and is characterized in that:

the turning-over auxiliary pad at least comprises:

the 1 st pad, dispose in the direction of height, carry the upper half body side of the user; and

a second pad 2 for placing at least the waist and hip of the user at the lower body side,

the first pad 1 is made of a cushioning material having a predetermined thickness and configured to support at least a part of the back of a user in a supine posture,

the 2 nd pad is formed of a cushioning material of a prescribed thickness,

a 2 nd support surface formed in a width narrower than the width of the pelvis of the user is provided at the widthwise central portion of the 2 nd pad,

a pair of 2 nd inclined parts inclined downward in an inclined plane or a stepwise manner from the end part of the 2 nd supporting surface outward are provided at both end parts in the width direction of the 2 nd pad, and are provided at least in a part in the longitudinal direction of the 2 nd supporting surface,

the 2 nd supporting surface is configured to support at least a part of the waist and hip of the user in the supine position, and the 2 nd inclined portion supports the trochanter of the femur of the user during the turning-over operation.

2. The turn assist pad of claim 1, wherein:

a 1 st support surface formed in a width of a user's shoulder width or less is provided at a widthwise central portion of the 1 st pad;

a pair of 1 st inclined portions which are provided at both ends in the width direction of the 1 st pad, are inclined downward in an inclined plane or a step shape from the end of the 1 st supporting surface toward the outside, and are provided at least in a part in the longitudinal direction of the 1 st supporting surface;

the 1 st support surface supports at least a part of the back of the user in the supine posture, and the 1 st inclined part supports the shoulder of the user when the user performs the turning-over operation.

3. The turn assist pad of claim 2, wherein:

the inclination angle theta 1 of the 1 st inclined part relative to the horizontal plane is different from the inclination angle theta 2 of the 2 nd inclined part relative to the horizontal plane.

4. The turn assist pad of claim 3, wherein:

the inclination angle theta 1 of the 1 st inclined part relative to the horizontal plane is larger than the inclination angle theta 2 of the 2 nd inclined part relative to the horizontal plane (theta 1 > theta 2).

5. The turn assist pad according to claim 3 or 4, wherein:

the width W1 of the 1 st seating surface is wider than the width W2 of the 2 nd seating surface (W1 > W2).

6. The turn assist pad according to any one of claims 3 to 5, wherein:

the height H1 of the 1 st support surface is higher than the height H2 of the 2 nd support surface (H1 > H2).

7. The turn assist pad of claim 2, wherein:

the width W1 of the 1 st supporting surface is wider than the width W2 of the 2 nd supporting surface (W1 > W2);

an inclination angle θ 1 of the 1 st inclined portion with respect to a horizontal plane is substantially equal to an inclination angle θ 2 of the 2 nd inclined portion with respect to a horizontal plane (θ 1= θ 2).

8. The turn assist pad of claim 7, wherein:

9. The turn assist pad of claim 2, wherein:

a width W1 of the 1 st seating surface is substantially equal to a width W2 of the 2 nd seating surface (W1 = W2);

an inclination angle θ 1 of the 1 st inclined part with respect to a horizontal plane is substantially equal to an inclination angle θ 2 of the 2 nd inclined part with respect to a horizontal plane (θ 1= θ 2);

the height H1 of the 1 st supporting surface is higher than the height H2 of the 2 nd supporting surface (H1 > H2).

10. The turning assist pad as claimed in any one of claims 1 to 9, wherein:

at least a 3 rd pad made of a cushion material having a predetermined thickness is disposed between the 1 st pad and the 2 nd pad.

11. A turn-over assisting pad as claimed in any one of claims 1 to 9, wherein:

a3 rd pad made of a cushioning material having a predetermined thickness is disposed on the foot side of the 2 nd pad, and the 3 rd pad has the same configuration as the 1 st pad.

12. A turn-over auxiliary mattress is characterized in that:

the turning-over assistant mattress is provided with the turning-over assistant in any one of claims 1 to 11

A pad;

the turning-over auxiliary pad is disposed on the base layer formed of the cushion material.

13. A turn assist mattress as claimed in claim 12 wherein:

the 1 st pad and the 2 nd pad are arranged on the base layer at an interval.

14. A turn assist mattress as claimed in claim 12 or 13 wherein:

the width of the base layer is wider than the widths of the 1 st pad and the 2 nd pad;

at least one end of the base layer in the width direction has an end block protruding in the height direction and disposed at least partially in the longitudinal direction of the base layer.

15. A turn assist mattress as claimed in any one of claims 12 to 14 wherein:

at least more than 1 upper layer formed by buffer material is laminated on the turning auxiliary pad;

the cushioning material constituting the upper layer has a lower hardness than the cushioning material constituting the 1 st pad.