CN111134475B - Power-assisted chair with armpit supporting device - Google Patents

Abstract

The invention provides a booster chair with an underarm support device, which relates to the technical field of seat devices and comprises: a seat support part, a seat part, a backrest part and a support part; the seat support part is provided with a horizontal placement table; the seat part is provided with a seat cavity and can be arranged on the horizontal placing table in a turnover way; the backrest part is arranged at one end of the seat part far away from the seat supporting part in a turnover way, and is vertically arranged on the horizontal placing table; the supporting parts all comprise axillary supporting plates and linkage mechanisms; the armpit supporting plate is assembled on the backrest part through the linkage mechanism, the seat part is in an upright state, and the linkage mechanism controls the armpit supporting plate to relatively protrude along the horizontal direction and transversely arranged on the backrest part, so that the armpit supporting plate is in a use state capable of supporting armpits of a user and is used for supporting the weight of the upper body of the user, and accidents such as falling are avoided. The seat part is in a flat state, and the linkage mechanism controls the armpit supporting plate to be placed in parallel with the backrest part along the vertical direction, so that the armpit supporting plate is in an avoidance state relatively far away from a user so as to reduce interference.

Description

Power-assisted chair with armpit supporting device

Technical Field

The invention relates to the technical field of seat devices, in particular to a booster chair with an underarm support device.

Background

With the aging of the population and the aggravation of the aging of China, the number of disabled and sick old people in China is increased. In life, people often see sick people, elderly people and severe patients, and the people are inconvenient to move due to extremely weak physical strength. Especially, the elderly can be severely affected by chronic diseases such as arthritis, lumbar disc herniation and the like. These persons often do not stand up after sitting for a long time and the legs do not have sufficient strength to support their body.

The existing seat auxiliary products are still in the primary stage, have unobtrusive innovation, are complex in functional form, are large in device, are heavy, are high in cost, and are not used under economic conditions at all by common families. In the prior art, most of auxiliary seats appeared on the market lift the pelvis of the old through the overturning of the seat plate, but the weight of the upper half body has no supporting force, and when the old is likely to get up, the whole body is bent due to insufficient knee force, so that accidents are caused.

Disclosure of Invention

The invention discloses a booster chair with an underarm supporting device, which is simple in structure and convenient to operate, and aims to solve the problem that the existing booster chair lacks auxiliary support.

The invention adopts the following scheme:

A booster chair with underarm support, comprising: a seat support part, a seat part, a backrest part and a support part; the seat support part is provided with a horizontal placement table; the seat part is arranged on the horizontal placing table in a turnover way, and is in an upright state vertically arranged on the horizontal placing table and in a flat state transversely arranged on the horizontal placing table; the backrest part is arranged at one end of the seat part, which is far away from the seat support part, and is vertically arranged relative to the horizontal placing table when the seat part is in an upright state or a flat state so as to be used for leaning by a user; the support parts are arranged at the left side and the right side of the backrest part and used for supporting armpits of users; the support parts all comprise a supporting plate for supporting armpits and a linkage mechanism for controlling the armpit supporting plate to switch between a use state and an avoidance state; the armpit supporting plate is assembled on the backrest part through the linkage mechanism, the seat part is in an upright state, and the linkage mechanism controls the armpit supporting plate to relatively protrude in the horizontal direction and transversely arranged on the backrest part, so that the armpit supporting plate is in a use state capable of supporting armpits of a user; the seat part is in a flat-lying state, and the linkage mechanism controls the armpit supporting plate to be placed in parallel with the backrest part along the vertical direction relatively, so that the armpit supporting plate is in an avoidance state relatively far away from a user.

As a further improvement, the linkage mechanism comprises a frame arranged on the backrest part, a support rod and a long connecting rod which are respectively arranged at two ends of the frame in a hinged manner, and a short connecting rod which connects the support rod and the long connecting rod; the armpit supporting plate is arranged at one end of the supporting rod far away from the hinging point of the supporting rod, the long connecting rod is a stressed rod, and the long connecting rod is provided with an avoidance groove for accommodating the supporting rod in a penetrating manner so that the supporting rod and the long connecting rod intersect and mutually avoid and rotate along the frame; the short connecting rod is hinged between the supporting rod and the long connecting rod, the long connecting rod is controlled by external force, the long connecting rod drives the short connecting rod to rotate to be contained in the avoidance groove and to be mutually perpendicular to the supporting rod, the hinge point of the long connecting rod and the frame, the hinge point of the short connecting rod and the supporting rod, and the hinge point of the long connecting rod and the hinge point of the short connecting rod are located on the same straight line position, and at the moment, the supporting rod is relatively arranged on the backrest part in a protruding mode along the horizontal direction, so that the armpit supporting plate is in a use state.

As a further improvement, the control of the external force on the long connecting rod is relieved, the supporting rod is driven to rotate by the self gravity of the armpit supporting plate arranged at the end part of the supporting rod, and then the long connecting rod is driven to rotate until the supporting rod is kept still approximately along the vertical direction, so that the armpit supporting plate is in an avoidance state.

As a further improvement, the length of the avoidance groove is at least greater than the sum of the length of the short connecting rod and the width of the supporting rod.

As a further improvement, one end of the frame is provided with a limiting rod along the vertical direction, and the limiting rod is used for relatively abutting and supporting the long connecting rod in a use state.

As a further improvement, the upper end surface of the armpit supporting plate is in an radian which is suitable for the armpit of a user, and the height of the armpit supporting plate relative to the supporting rod is adjustable.

As a further improvement, the seat support part comprises a front leg and a rear leg, and is provided with at least four to stably place the seat support part; the front end face of the front landing leg is provided with a pedal part capable of moving up and down, and the pedal part is linked with the supporting part, so that the armpit supporting plate of the supporting part is correspondingly switched between a use state and an avoidance state by controlling the up and down of the pedal part.

As a further improvement, a pull rope is connected between the supporting part and the pedal part, one end of the pull rope is connected to the long connecting rod, the other end of the pull rope is connected to the pedal part along the backrest part and the seat part, and the pull rope drives the long connecting rod to rotate along the hinge point of the long connecting rod and the frame through lifting movement of the pedal part.

As a further improvement, the pedal part comprises an L-shaped pedal and a backup plate; the backup plate is vertically arranged relatively, and a sliding assembly for driving the pedal part to lift and move along the vertical direction is arranged between the backup plate and the seat supporting part; the sliding assembly comprises a sliding rail vertically arranged on the seat supporting part and a sliding seat slidably arranged on the sliding rail, and the backup plate is fixedly connected with the sliding seat; the pedal is characterized in that a spring is arranged on the lower end face of the pedal and is abutted to the pedal to provide elastic force for the pedal to ascend and move along the vertical direction, so that the pedal is driven to ascend and move.

As a further improvement, the pull rope is a steel wire rope which is switched between an erect state and a flat state through the seat part, and the steel wire rope is always in a stretched state so as to provide pulling force for linkage between the pedal part and the supporting part.

By adopting the technical scheme, the invention can obtain the following technical effects:

According to the booster chair, the seat part which can be arranged on the seat supporting part in a turnover mode and the backrest part which can be arranged on the seat part in a turnover mode are in turnover fit, so that the seat part is switched between the vertical state and the horizontal state, a user is correspondingly assisted to stand or sit down, the backrest part is vertically arranged with the horizontal placing table all the time for leaning of the user, and the booster chair is convenient to operate and high in practicability. The left side and the right side of the backrest part are provided with supporting parts for supporting armpits of users, and the armpit supporting plates of the supporting parts are switched between a use state and an avoidance state under the control of the linkage mechanism, so that when the seat part is in an erect state, the users stand on one side of the seat part and the backrest part which are relatively vertically arranged, and the armpits of the users are placed on the armpit supporting plates which relatively protrude in the horizontal direction and are horizontally arranged on the backrest part, so that the weight of the upper half of the users is supported, and accidents such as falling down are avoided. When the seat part is in a flat state, a user sits on the seat part and leans against the backrest part, and at the moment, the linkage mechanism controls the axillary support plates to be placed in parallel with the backrest part along the vertical direction relatively, so that the axillary support plates are in an avoidance state relatively far away from the user, and the user can lean against the backrest part after sitting down conveniently. The supporting part is relatively protruded and horizontally arranged on the backrest part when in use, and is relatively avoided and recovered when not in use so as to reduce the interference to users and other problems.

Further, the frame of the linkage mechanism is fixedly arranged on the backrest part, two ends of the frame are respectively hinged with the support rod and the long connecting rod, and a short connecting rod is hinged between the support rod and the long connecting rod. The armpit supporting plate is arranged at one end of the supporting rod, which is far away from the hinge point, the supporting rod and the long connecting rod are crossed along the frame and mutually dodged and rotate, the long connecting rod is a stressed rod and is controlled by external force, so that the long connecting rod drives the short connecting rod to rotate to a dodge groove which is contained in the long connecting rod and is mutually perpendicular to the supporting rod, the hinge point of the long connecting rod and the frame, the hinge point of the short connecting rod and the hinge point of the supporting rod, and the hinge point of the long connecting rod and the hinge point of the short connecting rod are correspondingly positioned on the same straight line, the linkage mechanism is positioned at a dead point position, and the supporting rod is oppositely arranged at a back part in a protruding mode along the horizontal direction, so that the armpit supporting plate is in a use state. The support rod is driven to rotate by the gravity of the armpit supporting plate arranged at the end part of the support rod until the control of the external force on the long connecting rod is released, and then the long connecting rod is driven to rotate until the support rod is kept still approximately along the vertical direction, so that the armpit supporting plate is in an avoidance state.

Further, the front end face of the front supporting leg of the seat supporting part is provided with a pedal part capable of moving up and down, and a pull rope is connected between the pedal part and the supporting part to realize mutual linkage. The pedal lower end face of the pedal part is provided with a spring for providing the pedal part to ascend and move along the vertical direction, when the pedal part is not used by a user, the spring drives the pedal part upwards to reach a certain height, and the stay cord does not provide long connecting rod pulling force at the moment, so that the armpit supporting plate is in an avoidance state. When a user uses the seat, the user stands on the pedal part, so that the pedal part descends to the ground along the vertical direction, and at the moment, the stay cord pulls the long connecting rod under the drive of the pedal part to provide external tension for the long connecting rod, so that the long connecting rod rotates to a dead point position, and the corresponding armpit supporting plate is in a use state and is supported under the armpit of the user. Until the seat part is turned over to a flat state, the backrest part is arranged vertically correspondingly, the gravity center of the user is transferred to the seat part, the pedal is pushed by the spring to move upwards along the vertical direction, the user moves upwards correspondingly to adjust the proper sitting posture, at the moment, the pull rope releases the external pulling force on the long connecting rod, and the armpit supporting plate arranged at the end part of the supporting rod drives the supporting rod, the long connecting rod and the short connecting rod to rotate mutually through the gravity of the armpit supporting plate arranged at the end part of the supporting rod, so that the armpit supporting plate is in an avoidance state.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a booster seat in accordance with embodiment 1 of the present invention in a first view, in which a seat portion is in an upright state;

Fig. 2 is a schematic structural view of the booster seat of embodiment 1 of the present invention in a second view, in which the seat part is in a flat state;

FIG. 3 is a schematic view of the structure of FIG. 1 from another perspective, wherein G represents the location of the center of gravity of the user;

FIG. 4 is a schematic view of the structure of FIG. 1 at other viewing angles;

FIG. 5 is a schematic view of the seat portion of FIG. 3 in a laid-flat configuration;

FIG. 6 is a schematic view showing the structure of a supporting part of a booster seat according to embodiment 1 of the present invention, wherein the arrow direction indicates the direction of the tensile force applied by the long link;

Fig. 7 is a schematic view of the booster seat of embodiment 1 of the present invention in a third view, in which the seat portion is in a flat state;

FIG. 8 is a schematic diagram of the structure of FIG. 5 in other embodiments;

FIG. 9 is a schematic view of the structure of FIG. 8 at another view angle;

Fig. 10 is a schematic view of the booster seat of embodiment 2 of the present invention in a first view, in which the seat portion is in an upright state;

FIG. 11 is an enlarged partial view of region I of FIG. 10;

FIG. 12 is a schematic view showing the structure of the booster seat in accordance with embodiment 2 of the present invention at a second view angle, in which the seat portion is in a flat state;

Fig. 13 is an enlarged view of a portion of the area I I of fig. 12.

Icon: 1-a seat stay; 11-a horizontal placement table; 12-supporting legs; 121-front legs; 122-rear legs; 13-a cross beam; 14-mounting a rod; 2-a seat part; 21-a seat cavity; 3-a backrest; 4-a support; 41-axillary support plates; 421-rack; 422-supporting bars; 423-long connecting rod; 4231-avoiding grooves; 424-short links; 425-stop bars; 426—a tie rod; 43-shrapnel type sleeve; 5-a link mechanism; 51-an active lever; 52-a first link; 53-a second link; 54-a third link; 6-a pushing mechanism; 61-an electric push rod; 7-a pedal; 71-pedal; 72, backing plate; 8-a sliding assembly; 81-sliding rails; 82-a slide; 9-pulling ropes; 10-spring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Example 1

Referring to fig. 1 to 4, the present embodiment provides a booster chair with an underarm support device, comprising: a seat support 1, a seat 2, a backrest 3 and a support 4.

Wherein the seat support 1 has a horizontal placement table 11. In the present embodiment, the seat stay 1 includes the front leg 121 and the rear leg 122, and at least four are provided to smoothly place the seat stay 1. The cross beams 13 are connected between the supporting legs 12, the cross beams 13 are arranged at the top ends of the supporting legs 12, and the cross beams 13 are enclosed to form the horizontal placement table 11. Preferably, each supporting leg 12 and each cross beam 13 are all made of aluminum profiles, so that the aluminum profiles are light in weight and convenient to assemble, disassemble and carry.

The seat 2 is disposed on the horizontal placement table 11 so as to be turnable, and the seat 2 has an upright state disposed vertically on the horizontal placement table 11 and a flat state disposed horizontally on the horizontal placement table 11. The backrest part 3 is arranged at one end of the seat part 2 far away from the seat support part 1 in a turnover way, and when the seat part 2 is in an upright state or a flat state, the backrest part 3 is vertically arranged on the horizontal placing table 11 for leaning of a user. Through the upset cooperation between seat portion 2 that can overturn and dispose on seat portion 1 and the back portion 3 that can overturn and dispose on seat portion 2 for seat portion 2 switches between erect state and flat state, corresponds auxiliary user standing or sitting down, and back portion 3 is vertical with horizontal placement platform 11 all the time for the user leans on the use, convenient operation and practicality are strong. The seat 2 and the backrest 3 that are provided in a turned manner may be a folded state of the seat 2 and the backrest 3 on the seat support 1 by providing a link such as a hinge or a movable hinge between the two, and the folded state is realized by manually applying force, and will not be described here. The control of the tilting of the seat portion 2 by the link mechanism 5 and the pushing mechanism 6 will be described in further detail later.

The support parts 4 are disposed on the left and right sides of the backrest part 3 to support the armpits of the user. The supporting parts 4 each comprise an armpit supporting plate 41 for supporting armpits and a linkage mechanism for controlling the armpit supporting plate 41 to switch between a use state and an avoidance state. The armpit supporting plate 41 is assembled on the backrest part 3 through a linkage mechanism, the seat part 2 is in an upright state, and the linkage mechanism controls the armpit supporting plate 41 to relatively protrude along the horizontal direction and transversely arranged on the backrest part 3, so that the armpit supporting plate 41 is in a use state capable of supporting armpits of a user. The seat part 2 is in a flat state, and the linkage mechanism controls the armpit supporting plate 41 to be placed in parallel with the back rest part 3 along the vertical direction, so that the armpit supporting plate 41 is in an avoidance state relatively far away from a user. Wherein, the supporting part 4 is relatively protruded and horizontally arranged on the backrest part 3 when in use, and is relatively avoided and recovered when not in use. When the seat part 2 is in the upright state, the user stands on one side of the seat part 2 and the backrest part 3 which are arranged relatively vertically, and the armpits are placed on the armpit supporting plates 41 which relatively protrude relatively along the horizontal direction and are transversely arranged on the backrest part 3, so that the weight of the upper half of the user is supported, and accidents such as falling down and the like are avoided. When the seat part 2 is in a flat state, a user sits on the seat part 2 and leans against the backrest part 3, and at the moment, the linkage mechanism controls the armpit supporting plate 41 to be placed in parallel with the backrest part 3 along the vertical direction relatively, so that the armpit supporting plate 41 is in an avoidance state relatively far away from the user, and the user can lean against the backrest part 3 after sitting down conveniently.

Referring to fig. 3 to 7, the linkage mechanism includes a frame 421 disposed on the backrest 3, a support bar 422 and a long link 423 respectively hinged to both ends of the frame 421, and a short link 424 connecting the support bar 422 and the long link 423. The armpit supporting plate 41 is disposed at one end of the supporting rod 422 away from the hinge point, and the long connecting rod 423 is provided with a avoiding groove 4231 for accommodating the short connecting rod 424 and penetrating the supporting rod 422, so that the supporting rod 422 and the long connecting rod 423 intersect and avoid each other along the frame 421. The short link 424 is hinged between the support rod 422 and the long link 423, and the long link 423 is a stressed rod, and the long link 423 is controlled by an external force, so that the long link 423 drives the short link 424 to rotate to be accommodated in the avoidance groove 4231 and to be mutually perpendicular to the support rod 422. When the long link 423 is pulled by an external force to rotate along the hinge point between the long link 423 and the frame 421 and the hinge point between the short link 424 and the support bar 422, and the hinge points between the long link 423 and the short link 424, the link mechanism is at the dead point, and the support bar 422 is relatively protruded in the horizontal direction at the time to be placed on the backrest 3, so that the armpit supporting plate 41 is in a use state. Since the linkage is now in the dead-center position, the armpit support plate 41 on the support bar 422 can bear a large pressing force provided by the armpits of the user. Until the pulling of the long connecting rod 423 by the external force is released, the supporting rod 422 is subject to the self gravity of the armpit supporting plate 41 arranged at the end part of the supporting rod 422, so that the short connecting rod 424 is driven to rotate, and the long connecting rod 423 is driven to rotate until the supporting rod 422 is kept still approximately along the vertical direction, and the armpit supporting plate 41 is in an avoidance state.

Specifically, the length of the avoidance slot 4231 is at least greater than the sum of the length of the short connecting rod 424 and the width of the supporting rod 422, so that the short connecting rod 424 can be accommodated in the avoidance slot 4231, and the short connecting rod 4231 passes through the avoidance slot 4231 and is crossed with the long connecting rod 423 along the frame 421 and avoid the rotating supporting rod 422 mutually, when the linkage mechanism is at the dead point position, the supporting rod 422 drives the short connecting rod 424 to be accommodated in the avoidance slot 4231, the hinge point of the long connecting rod 423 and the frame 421, the hinge point of the short connecting rod 424 and the supporting rod 422, and the hinge point of the long connecting rod 423 and the short connecting rod 424 are positioned on the same straight line. It should be noted that in other embodiments, the long link 423 may also be formed by two plates hinged to two outer end surfaces of the same end of the frame 421, a gap is formed between the two plates for the supporting rod 422 to pass through, and a short link 424 with one end hinged to the inner end surface of the other end of the two plates is accommodated, so that the relative rotation of the link rod to the dead point position is realized, and the relative limit support of the supporting rod 422 along the pressing direction is facilitated.

Further, a limiting rod 425 is disposed at one end of the frame 421 along the vertical direction, and the limiting rod 425 is used for relatively abutting against and supporting the long connecting rod 423 when in a use state. The limiting rod 425 is vertically configured at one side of the hinge point of the frame 421 and the long connecting rod 423, so that the long connecting rod 423 at the dead point position just abuts against the limiting rod 425, the long connecting rod 423 is prevented from being continuously pulled to rotate (rotating anticlockwise in the figure) by external force, and the axillary support plate 41 is further stabilized for supporting.

Preferably, the upper end surface of the armpit supporting plate 41 has an arc adapted to the armpit of the user, which is ergonomic and improves the comfort of the armpit supporting. In this embodiment, the height of the armpit supporting plate 41 relative to the supporting rod 422 is adjustable, the armpit supporting plate 41 is assembled at one end of the supporting rod 422 through the spring plate type sleeve 43, the armpit supporting plate 41 is configured on the supporting rod 422 through the sleeve, the spring plate 41 is connected to the spring plate, and the spring plate is relatively sleeved in the sleeve to realize the height adjustment between the armpit supporting plate 41 and the supporting rod 422, so that the device is suitable for users with different heights and has strong applicability. It should be noted that, in other embodiments, the device may be implemented by a telescopic rod or an adjusting member.

Referring to fig. 5 to 9, a pedal 7 is disposed on a front end surface of the front leg 121. The pedal 7 is linked with the support 4, so that the armpit supporting plate 41 of the support 4 is correspondingly switched between the use state and the avoidance state by controlling the lifting of the pedal 7.

Specifically, the pedal 7 and the support 4 are interlocked with each other. A pull rope 9 is connected between the supporting part 4 and the pedal part 7, one end of the pull rope 9 is connected to the long connecting rod 423, the other end of the pull rope 9 is connected to the pedal part 7 along the back rest part 3 and the seat part 2, and the pull rope 9 drives the long connecting rod 423 to rotate along the hinge point of the long connecting rod 423 and the frame 421 through lifting movement of the pedal part 7, so that the supporting rod 422 correspondingly drives the armpit supporting plate 41 to switch between a use state and an avoidance state. In the present embodiment, the foothold 7 includes an L-shaped pedal 71 and a back plate 72. The backup plate 72 is vertically arranged relatively, and a sliding component 8 for driving the pedal part 7 to lift and move along the vertical direction is arranged between the backup plate 72 and the seat supporting part 1. The sliding assembly 8 comprises a sliding rail 81 vertically arranged on the seat support 1 and a sliding seat 82 slidably arranged on the sliding rail 81, and the backup plate 72 is fixedly connected with the sliding seat 82. The lower end surface of the pedal 71 is provided with a spring 10, and the spring 10 is abutted to the pedal 71 to provide the elastic force for the pedal 7 to move up in the vertical direction, so as to drive the pedal 7 to move up. The pedal 71 is not pressed downwards by the user when standing, the pedal 71 is driven by the sliding seat 82 to move upwards along the sliding rail 81 until reaching a certain height under the action of the elastic force of the spring 10, the pull rope 9 does not provide the tension of the long connecting rod 423, and the armpit supporting plate 41 is in an avoidance state under the action of the gravity of the armpit supporting plate 41 at one end of the supporting plate.

More preferably, the pull rope 9 is a wire rope. The wire rope has a certain elastic force and rigidity, and is switched between an erect state and a flat state via the seat part 2, and is always in a stretched state to provide a pulling force for the linkage between the pedal part 7 and the supporting part 4. In this embodiment, one end of the wire rope is fixedly connected to the pedal 7, the other end of the wire rope is arranged along the outer frame of the booster chair until the wire rope is connected to the long connecting rod 423 of the supporting part 4, and the wire rope is fixedly connected to one side of the long connecting rod 423, which is far away from the hinge point of the long connecting rod 423 and the frame 421, so that when the pedal 7 is pressed by the external pressing force (the stepping force of the two feet of the user), the wire rope in a always tight state provides a pulling force for the rotation of the long connecting rod 423, the linkage mechanism rotates to the dead point position, and the armpit supporting plate 41 is in a use state. When the pedal 7 is not pressed by the external pressing force, the pedal 7 is lifted and moved by the spring 10, and the tension (force of moving to the dead point) of the long link 423 by the wire rope is released, so that the linkage mechanism rotates relatively under the action of gravity of the armpit supporting plate 41, and the armpit supporting plate 41 is in an avoidance state.

The stay cord 9 may be disposed on the outer frame of the booster seat by correspondingly providing guide holes (not shown) on the outer frame of the booster seat, and the stay cord 9 may be disposed in each guide hole in a penetrating manner to achieve tight connection between the pedal 7 and the long link 423. Guide wheels may be provided along the pulling path of the pull rope 9, and the pull rope 9 may be closely disposed on the guide end surfaces of the guide wheels, so as to connect the pedal 7 and the long link 423 of the pull rope 9, and correspondingly guide and pull the long link 423.

Further, the two supporting parts 4 are linked by the connecting rod 426, wherein the connecting rod 426 is connected between the two long connecting rods 423, so that the two supporting parts 4 are in a use state or an avoidance state synchronously. Preferably, the connecting rod 426 is disposed at one end of the two long connecting rods 423 away from the hinge point of the long connecting rods 423 and the frame 421, and one end of the pull rope 9 is tied on the connecting rod 426, so that the long connecting rods 423 are driven to rotate by pulling the connecting rod 426.

The booster chair of this embodiment works as follows:

When the user is not in use, the spring 10 drives the pedal 7 upwards to a certain height, and the pull rope 9 does not provide tension to the long connecting rod 423 at this time, so that the armpit supporting plate 41 is in an avoidance state. When a user uses the seat, the user leans on the seat part 2 and the backrest part 3 and stands on the pedal part 7, so that the pedal part 7 descends to the ground along the vertical direction, and at the moment, the stay cord 9 pulls the long connecting rod 423 under the driving of the pedal part 7 to provide external tension for the long connecting rod 423, so that the long connecting rod 423 rotates to a dead point position, and the corresponding armpit supporting plate 41 is in a use state and is supported by the armpits of the user. Until the seat part 2 is turned over to a flat state, the backrest part 3 is correspondingly vertically arranged, at the moment, the gravity center of the user is transferred to the seat part 2, the spring 10 pushes the pedal 71 to move upwards along the vertical direction, meanwhile, the feet of the user move upwards correspondingly to adjust the proper sitting posture, at the moment, the pull rope 9 releases the external pulling force on the long connecting rod 423, so that the armpit supporting plate 41 returns to an avoidance state. Until the user needs to stand, the gravity center of the user returns to the feet, and the pedal 7 is pressed to the ground, and the armpit supporting plate 41 returns to the use state again for the user to stand up.

Example 2

In the present embodiment, the seat part 2 and the backrest part 3 are arranged in a flip-flop manner with reference to fig. 10 to 13. The link mechanism 5 includes at least an active lever 51, a first link 52, a second link 53, and a third link 54. The seat part 2 is connected to the active rod 51 so as to follow the relative movement of the active rod 51. The third link 54 is a frame in the link mechanism 5, and the driving lever 51 and the second link 53 rotate along the frame 421, which corresponds to switching the seat portion 2 disposed on the driving lever 51 between the upright state and the flat state. The backrest part 3 is connected with the first connecting rod 52, and when the seat part 2 is in an upright state or a flat state, the backrest part 3 is vertically arranged on the horizontal placement table 11, the driving rod 51 is driven to rotate along the third connecting rod 54 through the pushing mechanism 6, so that the seat part 2 is converted between the upright state and the flat state, the user is correspondingly assisted to stand or sit down, and the control mechanism is used for controlling the start and stop of the pushing mechanism 6, so that the overturning linkage of the seat part 2 and the backrest part 3 is realized. The particular arrangement of the push rod mechanism and the control mechanism is described in further detail below.

Further, the link mechanism 5 is a parallelogram link mechanism 5. The third link 54 is oppositely extended and fixed on one of the front legs 121 to serve as a fixed frame in the link mechanism 5. The driving rod 51 is a force-bearing rod in the link mechanism 5, and the driving rod 51, the second link 53 and the cross beam 13 are matched, so that the driving rod 51 is rotated by an external force to be transversely arranged on the corresponding cross beam 13, and the seat part 2 is driven to be in a flat-lying state. In the present embodiment, the driving lever 51 has one end connected to the first link 52 and the other end connected to the third link 54. The other end of the first link 52 is connected to the second link 53, both ends of the second link 53 are connected to the first link 52 and the third link 54, respectively, and the other end of the third link 54 is connected to the driving lever 51 to form the parallelogram linkage 5 in a linked manner. Preferably, the driving rod 51, the first connecting rod 52, the second connecting rod 53 and the third connecting rod 54 are hinged with each other through a revolute pair. The link mechanism 5 is a double-rocker link mechanism 5, the driving rod 51 and the second link 53 are long sides, the driving rod 51 and the second link 53 are rockers, and the first link 52 is correspondingly a connecting rod, so that efficient linkage of the four-link mechanism 5 is realized.

In the present embodiment, when the seat 2 is in the flat-laid state, the link mechanism 5 is substantially rectangular, and the first link 52 and the third link 54 are perpendicular to the driving lever 51 or the second link 53, respectively. When the seat 2 is in the upright state, the driving lever 51, the first link 52, the second link 53, and the third link 54 are all disposed substantially vertically, and the first link 52 and the third link 54 are parallel to the driving lever 51 or the second link 53, respectively. Wherein, each hinge point of four link mechanism 5 just disposes the extreme point position in one of them body of rod at most respectively for when link mechanism 5 rotates in order to drive seat portion 2 and is in the state of erectting, the length of each body of rod is because of the setting one by one of hinge point, and enough body of rod that makes between link mechanism 5 is approximately vertical parallel arrangement, and then has guaranteed that the first body of rod is in relative vertical setting under the two different states of seat portion 2, thereby makes the connection dispose the back portion 3 of one side of the first body of rod in the two different states of seat portion 2 and all place the platform 11 vertical setting horizontally.

Referring to the drawings, the booster chair of the present application has two link mechanisms 5, which are disposed at left and right sides of a horizontal placement table 11. Correspondingly, two pushing mechanisms 6 are provided, and each link mechanism 5 is driven to operate independently. In this embodiment, the seat part 2 is fixedly connected between the two driving rods 51 to move along with the driving rods 51. The seat part 2 is substantially rectangular for sitting down by a user. Wherein, a transverse rod is connected between the two first links 52, the backrest 3 is vertically disposed on the transverse rod and is parallel to the first links 52, and the backrest 3 and the first links 52 are rotated via the link mechanism 5, so that the backrest 3 is vertically disposed relative to the horizontal placement table 11 for leaning of a user.

Further, the lateral rod is extended outwardly along the first link 52, and is provided at its extension with a handrail portion for grasping by a user. The button switch is arranged on the armrest part, so that the user can control the use conveniently. The push button switch is electrically connected with the control mechanism, so as to control the telescopic pushing of the pushing mechanism 6. The push switch, the control mechanism and the pushing mechanism 6 are all electrically connected, and the push switch further controls the telescopic movement of the electric push rod 61 in the pushing mechanism 6 to realize the linkage control between the seat part 2 and the backrest part 3.

More preferably, the seat part 2 is provided with a seat cavity 21 adapted to the buttocks of the user, and the seat cavity 21 is located approximately in the middle of the end face of the seat part 2. And a container (not shown) for collecting excrement after the user sits down is arranged in the seat supporting part 1 corresponding to the seat cavity 21 on the seat part 2 in the flat state, so that the booster chair is used for assisting the user to sit down when the user sits down and assisting the user to stand after sitting down.

It should be noted that the driving rod 51 may be driven to rotate along the third link 54 by the pushing mechanism 6. For example, the pushing mechanism 6 is preferably a conventional electric push rod 61, the electric push rod 61 is disposed on one side of the seat support portion 1, and the output shaft thereof is hinged to the driving rod 51 or the seat portion 2, so as to push the seat portion 2 to move between the upright state and the flat state, which will not be described herein.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention.

Claims (9)

1. A booster chair with underarm support, comprising:

a seat support (1) having a horizontal placement table (11);

a seat part (2) which is arranged on the horizontal placing table (11) in a reversible manner, wherein the seat part (2) has an upright state vertically arranged on the horizontal placing table (11) and a flat state transversely arranged on the horizontal placing table (11);

The backrest part (3) is arranged at one end of the seat part (2) far away from the seat support part (1) in a turnover manner, and when the seat part (2) is in an upright state or a flat state, the backrest part (3) is vertically arranged relative to the horizontal placing table (11) so as to be used for leaning by a user;

Support parts (4) arranged at the left and right sides of the backrest part (3) for supporting the armpits of the user; the supporting parts (4) comprise axillary supporting plates (41) for supporting axillary parts and a linkage mechanism for controlling the axillary supporting plates (41) to switch between a using state and an avoiding state; the armpit supporting plate (41) is assembled on the backrest part (3) through the linkage mechanism, the seat part (2) is in an upright state, and the linkage mechanism controls the armpit supporting plate (41) to relatively protrude along the horizontal direction and transversely arranged on the backrest part (3), so that the armpit supporting plate (41) is in a use state capable of supporting armpits of a user; the seat part (2) is in a flat state, and the linkage mechanism controls the armpit supporting plate (41) to be placed in parallel with the backrest part (3) along the vertical direction relatively, so that the armpit supporting plate (41) is in an avoidance state relatively far away from a user;

The linkage mechanism comprises a frame (421) arranged on the backrest part (3), a supporting rod (422) and a long connecting rod (423) which are respectively hinged at two ends of the frame (421), and a short connecting rod (424) which connects the supporting rod (422) and the long connecting rod (423); the armpit supporting plate (41) is configured at one end of the supporting rod (422) far away from the hinging point of the supporting rod, and the long connecting rod (423) is provided with an avoidance groove for accommodating and penetrating the supporting rod (422), so that the supporting rod (422) and the long connecting rod (423) intersect and mutually avoid and rotate along the frame (421); the short connecting rod (424) is hinged between the supporting rod (422) and the long connecting rod (423), the long connecting rod (423) is a stressed rod, the long connecting rod (423) is controlled by external force, so that the long connecting rod (423) drives the short connecting rod (424) to rotate to be contained in the avoidance groove and to be mutually perpendicular to the supporting rod (422), the hinge point of the long connecting rod (423) and the frame (421), the hinge point of the short connecting rod (424) and the supporting rod (422) and the hinge point of the long connecting rod (423) and the short connecting rod (424) are located at the same straight line position, and at the moment, the supporting rod (422) is relatively arranged on the backrest (3) in a protruding mode along the horizontal direction, so that the armpit supporting plate (41) is in a use state.

2. The booster chair according to claim 1, wherein the long link (423) is controlled by releasing the external force, and the support rod (422) is subject to the own gravity of the armpit supporting plate (41) disposed at the end portion thereof, so as to drive the short link (424) to rotate, and further drive the long link (423) to rotate, until the support rod (422) is kept standing in the substantially vertical direction, so that the armpit supporting plate (41) is in the avoidance state.

3. The booster chair according to claim 1, characterized in that the length of the relief groove is at least greater than the sum of the length of the short link (424) and the width of the support bar (422).

4. Booster chair according to claim 1, characterized in that one end of the frame (421) is provided with a stop lever (425) in the vertical direction, the stop lever (425) being adapted to support the long link (423) in the use condition in relative abutment.

5. Booster chair according to claim 4, characterized in that the upper end surface of the armpit support plate (41) is curved to fit the armpit of the user, and the height of the armpit support plate (41) relative to the support bar (422) is adjustable.

6. Booster seat according to claim 1, characterized in that the seat stay (1) comprises a front leg (121) and a rear leg (122) and is provided with at least four to rest the seat stay (1) steadily; the front end face of the front supporting leg (121) is provided with a pedal part (7) capable of moving up and down, and the pedal part (7) is linked with the supporting part (4), so that the armpit supporting plate (41) of the supporting part (4) is correspondingly switched between a use state and an avoidance state by controlling the up and down of the pedal part (7).

7. Booster chair according to claim 6, characterized in that a pull rope (9) is connected between the support part (4) and the pedal part (7), one end of the pull rope (9) is connected to the long connecting rod (423), the other end of the pull rope is connected to the pedal part (7) along the backrest part (3) and the seat part (2), and the pull rope (9) drives the long connecting rod (423) to rotate along the hinge point of the long connecting rod (423) and the frame (421) through the lifting movement of the pedal part (7).

8. Booster chair according to claim 7, characterized in that the foot pedal (7) comprises a pedal (71) and a back plate (72) in the shape of an L; the backup plate (72) is vertically arranged relatively, and a sliding assembly (8) for driving the pedal part (7) to lift and move along the vertical direction is arranged between the backup plate (72) and the seat supporting part (1); the sliding assembly (8) comprises a sliding rail (81) vertically arranged on the seat supporting part (1) and a sliding seat (82) slidably arranged on the sliding rail (81), and the backup plate (72) is fixedly connected with the sliding seat (82); the lower end face of the pedal (71) is provided with a spring (10), and the spring (10) is abutted to the pedal (71) to provide elastic force for the pedal part (7) to move upwards along the vertical direction, so that the pedal part (7) is driven to move upwards.

9. Booster chair according to claim 7, characterised in that the pull cord (9) is a wire rope which is switched between an erect state and a flat state via the seat part (2), the wire rope being always in tension to provide a pulling force for the linkage between the foot pedal (7) and the support part (4).