CN218737999U - Adjusting device for seat unit and seat unit - Google Patents

Abstract

The utility model provides an adjusting device for a seat unit, which is used for adjusting the seat unit among sitting posture, stretching posture and lying posture and comprises a backrest connecting component, a middle transmission component and a foot placing connecting component which are connected in sequence; the backrest connecting assembly at least comprises a backrest connecting block; the middle transmission assembly at least comprises a seat frame and an adjusting mechanism used for adjusting the seat frame, the adjusting mechanism at least comprises a first connecting piece, a first hinge hole, a second hinge hole and a third hinge hole are sequentially arranged on the first connecting piece, the distance between the first hinge hole and the third hinge hole is A1, the distance between the second hinge hole and the third hinge hole is A2, and the proportion between the A2 and the A1 is not more than 0.5; the maximum angle change quantity of the backrest connecting block when the backrest connecting block is adjusted between the stretching posture and the lying posture is not less than 25 degrees, and the maximum angle change quantity of the seat frame when the seat frame is adjusted between the stretching posture and the lying posture is not less than 5 degrees. The utility model discloses can adjust the seat unit wide-angle, the user can reach zero gravity state when using.

Description

Adjusting device for seat unit and seat unit

Technical Field

The utility model relates to a seating unit field especially relates to an adjusting device and seating unit for seating unit.

Background

The functional chair can be adjusted to a sitting posture, an extending posture and a lying posture. Wherein the sitting position is a standard stowed position with the seat in its most original position for normal use by a person sitting in daily life with the seat portion in a generally horizontal orientation and the backrest arranged to be substantially upright; the extended position, commonly referred to as the TV position, extends the footrest forward of the seat portion while the backrest remains upright enough to allow the occupant of the seating unit to comfortably view television. And a reclined position (or lying position) in which the backrest is positioned rearwardly from the extended position at an obtuse angle to the seat for rest or sleep. The existing functional seat is small in adjustment angle, and is difficult to realize a zero-gravity (the horizontal line of the lower leg of a user is higher than the position of the heart) state when the functional seat is in an extending posture or a lying posture, so that the comfort level is low.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model discloses a first aim at provides an adjusting device for seating unit, it carries out the regulation in coordination of corresponding height and angle through putting foot to back portion, seat for the user can realize zero gravity state through the seating unit, has promoted the comfort level of seating unit.

Another object of the present invention is to provide a seating unit, which has a high comfort level and enables a user to be in a zero gravity state when the user is lying.

The embodiment of the utility model discloses a realize through following technical scheme:

an adjusting device for a seat unit is used for realizing the switching of the seat unit among a sitting posture, an extending posture and a lying posture and is characterized by comprising a backrest connecting assembly, a middle transmission assembly and a foot placing connecting assembly which are sequentially connected; the backrest connecting assembly at least comprises a backrest connecting block; the intermediate transmission assembly at least comprises a seat frame and an adjusting mechanism for adjusting the seat frame; the adjusting mechanism comprises a first connecting piece, a first hinge hole, a second hinge hole and a third hinge hole are sequentially arranged on the first connecting piece, the distance between the first hinge hole and the third hinge hole is A1, the distance between the second hinge hole and the third hinge hole is A2, and the ratio of the A2 to the A1 is not more than 0.5; the adjusting mechanism further comprises a fixed base plate and a rotary driving plate which are oppositely arranged, and two seventh connecting pieces arranged between the seat frame and the rotary driving plate; dispose hinge hole nine, hinge hole ten and hinge hole eleven on the rotatory drive plate in proper order, wherein: the first hinge hole eleven is distributed close to the foot placing connecting assembly, the second hinge hole nine is distributed close to the backrest connecting assembly, and the two seventh connecting pieces are correspondingly hinged to the first hinge hole eleven and the second hinge hole eleven one by one; the first hinge hole is coaxial with the ninth hinge hole; the distance between the hinge hole nine and the hinge hole ten is C1, the distance between the hinge hole nine and the hinge hole eleven is C2, and the ratio of C1 to C2 is not more than 0.35; when the backrest connecting block is adjusted between the stretching posture and the lying posture, the variation of an included angle between the side edge of the backrest connecting block and the horizontal plane is not less than 25 degrees.

According to a preferred embodiment, the adjusting mechanism further comprises a second connecting piece hinged to the first connecting piece, and the second connecting piece is sequentially provided with a fourth hinge hole, a fifth hinge hole and a sixth hinge hole, wherein: the fifth hinge hole is coaxial with the third hinge hole; the distance between the fourth hinge hole and the sixth hinge hole is B1, the distance between the fifth hinge hole and the sixth hinge hole is B2, and the proportion between the B2 and the B1 is not more than 0.5.

According to a preferred embodiment, the adjusting mechanism further comprises a third connecting piece hinged to the second connecting piece, and a seventh hinge hole and an eighth hinge hole are configured on the third connecting piece, wherein: the hinge hole seven is coaxial with the hinge hole six; the distance between the hinge hole seven and the hinge hole eight is not more than 230mm.

According to a preferred embodiment, said first, second and third connectors, and fourth, fifth and sixth connectors are provided between said fixed base plate and said rotary drive plate; the first connecting piece is hinged to the rotary driving plate through the first hinge hole; the second connecting piece is hinged to the fixed base plate through the fourth hinge hole; one end of the sixth connecting piece is hinged to the second hinge hole, and the other end of the sixth connecting piece is hinged to one end of the fourth connecting piece; the other end of the fourth connecting piece is hinged to the fixed base plate; one end of the fifth connecting piece is hinged between two end parts of the fourth connecting piece, and the other end of the fifth connecting piece is hinged to the rotary driving plate; the third connecting piece is hinged between the two end parts of the sixth connecting piece through the hinge hole.

According to a preferred embodiment, the pin connecting assembly comprises a pin connecting block; a rear mounting hole is formed in the fixed base plate, and a horizontal plane where the center of the rear mounting hole is located is defined as a reference plane; when the backrest connecting block is in a sitting posture, the height between the lowest point of the foot placing connecting block and the reference surface is H1, and H1 is not more than 100mm; when the backrest connecting block is in a lying posture, the height from the highest point of the foot placing connecting block to the reference plane is H2, and H2 is not more than 600mm.

According to a preferred embodiment, the rising distance of the foot placing connecting block in the process of adjusting the stretching posture to the lying posture is not more than 300mm.

According to a preferred embodiment, the distance between the highest point of the backrest connecting block and the reference plane is not more than 400mm in the sitting position, and the distance between the highest point of the backrest connecting block and the reference plane is not more than 320mm in the lying position.

According to a preferred embodiment, back coupling assembling still includes back stopper, back gag lever post and ninth connecting piece, the back connecting block with the back stopper is articulated, the one end of ninth connecting piece is articulated extremely between two extreme points of back connecting block, and the other end articulates to the back gag lever post, it is spacing protruding to have been provided with on the back gag lever post, be equipped with on the back stopper with spacing protruding assorted spacing face extend the appearance and adjust extremely the appearance in-process of lying, the central point of ninth connecting piece moves down the distance and is 30mm ~ 100mm.

According to a preferred embodiment, an elastic buffer device is arranged between the backrest limiting block and the backrest limiting rod.

According to a preferred embodiment, the elastic buffer means is a foam pad and/or a spring.

According to a preferred embodiment, the frame side edge varies from the horizontal plane by an angle of not less than 5 ° when the frame is adjusted between the extended position and the recumbent position.

According to a preferred embodiment, the adjustment of the seating unit from the sitting position to the extended position is a first adjustment phase, the adjustment of the seating unit from the extended position to the lying position is a second adjustment phase, the first and second adjustment phases being driven by the same drive source.

According to a preferred embodiment, the drive source is connected to the backrest connection assembly or the intermediate transmission assembly, and the output of the drive source is connected to the foot rest connection assembly.

According to a preferred embodiment, the driving source is a linear motor having an output shaft connected to the foot placing connection assembly.

According to a preferred embodiment, the drive source is a cylinder having a piston rod connected to the foot placement connection assembly.

According to a preferred embodiment, the first connection piece comprises an extension a, an extension b and a first transition section c connected in sequence, the extension a and the extension b being parallel, wherein: the second hinge hole and the third hinge hole are arranged on the extending part a, and the first hinge hole is arranged on the extending part b.

According to a preferred embodiment, the second connection piece comprises an extension d, an extension e and a second transition section f connected in sequence, the extension d and the extension e being parallel, wherein: and the fifth hinge hole and the sixth hinge hole are arranged in the extension part d, and the fourth hinge hole is arranged in the extension part e.

A seat unit comprising a backrest part, a seat part, a footrest part, and an adjustment device for the seat unit, wherein: the backrest connecting block is used for connecting the backrest part; the seat frame is used for connecting the seat part; when the user lies, the height difference between the highest point of the foot placing part and the highest point of the backrest part is not more than 400mm.

The utility model discloses technical scheme has following advantage and beneficial effect at least:

the utility model has reasonable structure design, and the user can realize the zero gravity state through the seat unit by cooperatively adjusting the corresponding height and angle of the backrest part, the seat part and the foot placing part, thereby improving the comfort of the seat unit; meanwhile, on the basis of using a small number of structural members as far as possible, the stable support and large-angle adjustment of the seat frame by the adjusting mechanism are realized, the cost is reduced, the complexity of the adjusting mechanism is reduced, the later maintenance is facilitated, the size of the adjusting mechanism can be reduced, and the space occupation ratio is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

FIG. 1 is a schematic view of the seating unit of the present invention in a sitting position;

FIG. 2 is a schematic structural view of the seat unit in the extended position of the present invention;

FIG. 3 is a schematic structural view of the seating unit of the present invention in a lying position;

FIG. 4 is a schematic view of the seat unit adjustment mechanism of the present invention in a sitting position;

FIG. 5 is a schematic view of the seat unit adjustment mechanism of the present invention in an extended position;

FIG. 6 is a schematic structural view of the seat unit adjusting mechanism of the present invention in a lying position;

FIG. 7 is a schematic view of a corresponding rear side of the adjustment mechanism of the seating unit of FIG. 6;

fig. 8 is a schematic front view of the rotary driving plate according to the present invention;

fig. 9 is a front view of the first connecting member of the present invention;

fig. 10 is a front view of the second connecting member of the present invention;

fig. 11 is a schematic front view of a third connecting member according to the present invention;

fig. 12 is a schematic structural view of the fixing substrate of the present invention mounted on the frame.

An icon: 1-backrest part, 10-backrest connecting assembly, 11-backrest connecting block, 12-backrest limiting block, 121-limiting surface, 13-backrest limiting rod, 131-limiting protrusion, 14-eighth connecting piece, 15-ninth connecting piece, 2-seat part, 20-intermediate transmission assembly, 201-fixed base plate, 2011-limiting column, 2012-rear mounting hole, 202-rotary driving plate, 2021-hinge hole nine, 2022-hinge hole ten, 2023-hinge hole eleven, 21-seat frame, 22-seventh connecting piece, 23-first connecting piece, 231-hinge hole I, 232-hinge hole II, 233-hinge hole III, 234-extending part a, 235-first transition section c, 236-extending part b, 24-second connecting piece, 241-hinge hole four, 242-hinge hole five, 243-hole six, 244-extending part d, 245-second transition section f, 246-extending part e, 25-third connecting piece, 251-hinge hole seven, 252-eighth hole 27-fifth connecting piece, 27-sixth connecting piece, 27-foot connecting piece, 30-foot connecting piece, 31-connecting piece, and foot connecting block frame.

Detailed Description

For better understanding and implementation, the technical solutions in 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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

Referring to fig. 1 to 3, a seating unit includes a backrest 1, a seat 2, and a footrest 3; fig. 1 to fig. 3 correspond to the sitting position, the stretching position and the lying position respectively in sequence and can be adjusted by the adjusting device. The adjustment of the seat unit from the sitting posture shown in fig. 1 to the stretching posture shown in fig. 2 is a first adjustment stage, in the first adjustment stage, the angle of the backrest part 1 is basically kept unchanged, the foot placing part 3 extends upwards from the lowest point, the adjustment of the seat unit from the stretching posture shown in fig. 2 to the lying posture shown in fig. 3 is a second adjustment stage, in the second adjustment stage, the angle of the backrest part 1 is increased, and the foot placing part 3 continues to be lifted until the adjustment to the final lying posture is finished. In this embodiment, as shown in fig. 3, the highest point of the backrest portion 1 and the highest point of the footrest portion 3 are equal in height, and in other embodiments, the height difference between the highest point of the backrest portion 1 and the highest point of the footrest portion 3 is not greater than 400mm, preferably 100mm, 200mm, 300mm.

As shown in fig. 12, the frame 4 is fixedly installed on the ground, and the fixed base plate 201 is installed on the frame 4 to be stationary with respect to the ground. The fixing substrate 201 is provided with a rear mounting hole 2012, and a horizontal plane defining the center of the rear mounting hole 2012 is a reference plane.

In this embodiment, the seat unit performs posture adjustment through the seat unit adjusting device, please refer to fig. 4-6, which respectively correspond to the three states of the seat unit in fig. 1-3 in sequence. With reference to fig. 1 to 6, in particular to an adjusting device for a seat unit, which is used for adjusting the seat unit between a sitting posture, an extending posture and a lying posture, and comprises a backrest connecting assembly 10, a middle transmission assembly 20 and a foot placing connecting assembly 30 which are connected in sequence; the backrest connecting assembly 10 at least comprises a backrest connecting block 11, and the backrest connecting block 11 is used for connecting and adjusting the backrest part 1; the intermediate transmission assembly 20 at least comprises a seat frame 21 and an adjusting mechanism for adjusting the seat frame 21, wherein the seat frame 21 is used for connecting and adjusting the seat 2; the foot placing connecting assembly 30 comprises a foot placing connecting block 31 for connecting and adjusting the foot placing part 3; wherein:

the adjusting mechanism comprises a first connecting piece 23, a second connecting piece 24, a third connecting piece 25, a fourth connecting piece 26, a fifth connecting piece 27, a sixth connecting piece 28, a seventh connecting piece 22, a fixed base plate 201 and a rotary driving plate 202, wherein the fixed base plate 201 and the rotary driving plate 202 are arranged oppositely, the first connecting piece 23, the second connecting piece 24, the third connecting piece 25, the fourth connecting piece 26, the fifth connecting piece 27 and the sixth connecting piece 28 are arranged between the fixed base plate 201 and the rotary driving plate 202, the respective first ends of at least two seventh connecting pieces 22 are hinged to the rotary driving plate 202, and the respective second ends of two seventh connecting pieces 22 are hinged to the seat frame 21.

Specifically, as shown in fig. 4, 5, 6, and 7, a first hinge hole 231, a second hinge hole 232, and a third hinge hole 233 are sequentially disposed on the first connecting member 23, a distance between the first hinge hole 231 and the third hinge hole 233 is A1, a distance between the second hinge hole 232 and the third hinge hole 233 is A2, and a ratio between A2 and A1 is not greater than 0.5. In the present embodiment, the ratio between A2 and A1 is 0.291, more specifically, A2=25mm, A1=86mm. In other embodiments, the ratio between A2 and A1 may be 0.3, 0.4, 0.45. In this embodiment, the first connecting member 23 is hinged to the rotary driving plate 202 through the first hinge hole 231, the second hinge hole 232 is hinged to the sixth connecting member 28, the third hinge hole 233 is hinged to the second connecting member 24, the angle between the first connecting member 23 and the reference plane is 65.4 ° -136.6 °, the rising height of the first hinge hole 231 is 38mm, and therefore the seat frame 21 is driven to rotate forward and upward, the foot placing connecting member 30 is driven to move forward and upward, and the legs are higher than the head to achieve a zero gravity effect.

In this embodiment, the first connecting member 23 includes an extending portion a234, an extending portion b236 and a first transition section c235 connected in sequence, the extending portion a234 and the extending portion b236 are parallel, wherein: the second hinge hole 232 and the third hinge hole 233 are disposed in the extending portion a234, and the first hinge hole 231 is disposed in the extending portion b236. The second connecting piece 24 is hinged to the first connecting piece 23, and the second connecting piece 24 is sequentially provided with a fourth hinge hole 241, a fifth hinge hole 242 and a sixth hinge hole 243, wherein: the fifth hinge hole 242 is coaxial with the third hinge hole 233; the distance between hinge hole four 241 and hinge hole six 243 is B1, the distance between hinge hole five 242 and hinge hole six 243 is B2, and the ratio between B2 and B1 is not more than 0.5. In the present embodiment, the ratio between B2 and B1 is 0.316, more specifically, B2=30mm, B1=95mm. In other embodiments, the ratio between B2 and B1 may be 0.35, 0.40, 0.45.

In this embodiment, the second connecting member 24 includes an extension d244, an extension e246 and a second transition section f245 connected in sequence, the extension d244 and the extension e246 are parallel, wherein: a hinge hole five 242 and a hinge hole six 243 are provided in the extension portion d244, and a hinge hole four 241 is provided in the extension portion e246.

The fourth hinge hole 241 is hinged with the fixed base plate 201, the fifth hinge hole 242 is hinged with the first connecting piece 23, the sixth hinge hole 243 is hinged with the third connecting piece 25, the included angle change angle of the second connecting piece 24 and the reference surface is 43.4-102.1 degrees, the rising height of the sixth hinge hole 243 is 27.5mm, and therefore the backrest connecting assembly 10 is driven to rotate downwards and backwards, and the backrest angle achieves the zero gravity effect.

Third connecting piece 25 is articulated with second connecting piece 24, is configured with articulated hole seven 251 and articulated hole eight 252 on the third connecting piece 25, wherein: hinge hole seven 251 and hinge hole six 243 are coaxial; the distance between hinge hole seven 251 and hinge hole eight 252 is not greater than 230mm. In this embodiment, the distance between hinge hole seven 251 and hinge hole eight 252 is 183.44mm. In other embodiments, the distance between hinge hole seven 251 and hinge hole eight 252 may be 180mm, 190mm, 200mm.

The number of the seventh connecting members 22 is two, and the rotary drive plate 202 is sequentially provided with a hinge hole nine 2021, a hinge hole ten 2022 and a hinge hole eleven 2023, wherein: the eleventh hinge holes 2023 are distributed near the foot placing connecting assembly 30, the ninth hinge holes 2021 are distributed near the backrest connecting assembly 10, and the two seventh connecting pieces 22 are correspondingly hinged to the tenth hinge holes 2022 and the eleventh hinge holes 2023 one by one; the first hinge hole 231 is coaxial with the ninth hinge hole 2021; the distance between the hinge hole nine 2021 and the hinge hole ten 2022 is C1, the distance between the hinge hole nine 2021 and the hinge hole eleven 2023 is C2, and the ratio between C1 and C2 is not more than 0.35. In the present embodiment, the ratio between C1 and C2 is 0.154, more specifically, C1=50.37mm, C2=326.01mm. In other embodiments, the ratio between C1 and C2 may be 0.15, 0.25, 0.3.

In this embodiment, the fixing substrate 201 is provided with a limit post 2011, and when the backrest connecting block 11 is in a sitting posture, the second connecting member 24 abuts against the limit post 2011. The limiting post 2011 is used for limiting the second connecting member 24 when sitting to keep sitting. By setting the hinge hole on the rotation driving plate 202, according to the above preferred proportion, the rotation angle of the seat frame 21 can meet the corresponding requirement, that is, in the sitting posture, the included angle of the seat frame 21 with respect to the horizontal plane is 8.9 °, the distance from the highest point of the seat frame 21 to the reference plane is H3, and H3=204mm; when the chair is in the lying position, the distance from the highest point of the seat frame 21 to the reference plane is H4, H4=340mm, and the effect of zero gravity can be achieved when the chair is in the lying position; and the seat frame 21 can smoothly carry the sinking of the backrest part 1 and the rising of the footrest part 3.

In this embodiment, the hinge point of the seventh connecting member 22 and the seat frame 21 is 138mm away from the hinge point of the seventh connecting member 22 and the rotary driving plate 202, and in other embodiments, the distance may be other values between 130 mm and 150mm, and may be specifically set as required.

The first connecting piece 23 is hinged to the rotary driving plate 202 through a first hinge hole 231; the second connecting member 24 is hinged to the fixed base plate 201 through the hinge hole four 241; one end of the sixth connecting member 28 is hinged to the second hinge hole 232, and the other end is hinged to one end of the fourth connecting member 26; the other end of the fourth connecting member 26 is hinged to the fixing base plate 201; one end of the fifth connecting member 27 is hinged to the fourth connecting member 26 between both ends thereof, and the other end is hinged to the rotary driving plate 202; the third link 25 is hinged between both ends of the sixth link 28 through a hinge hole eight 252.

In summary, in the adjusting device for a seat unit in this embodiment, when in use, the fixed base plate 201 is fixedly connected to the frame 4 of the seat unit, and the frame 4 is placed on the ground, i.e. the fixed base plate 201 is stationary relative to the ground during adjustment of the seat unit. The two seventh connecting pieces 22, the seat frame 21 and the rotary driving plate 202 form a planar four-bar mechanism, and posture adjustment of the seat frame 21 is realized by driving the rotary driving plate 202 to perform posture adjustment on the planar four-bar mechanism. Further, the first link 23 is hinged to the fixed base plate 201 by the second link 24, and the first link 23 is hinged to the rotary drive plate 202 by the sixth link 28, the fourth link 26, and the fifth link 27. As shown in fig. 7, in the process of adjusting the seating unit from the extended position to the lying position, the second connecting member 24 rotates counterclockwise around the fourth hinge hole 241 to the lying position, and the first connecting member 23, the end of the seat frame 21 close to the backrest portion 1 and the end of the rotation driving plate 202 close to the backrest portion 1 are all lowered in height relative to the fixed base plate 201; meanwhile, as shown in fig. 6, the second connecting element 24 is used for adjusting the seat unit from the extending position to the lying position, and in the process, the second connecting element 24 rotates clockwise around the hinge hole four 241 to the lying position, here, the second connecting element 24 is used as a driving element, the second connecting element 24 drives the third connecting element 25 to move towards the foot placing portion 3, the third connecting element 25 drives the fifth connecting element 27 to rotate counterclockwise around the hinge point of the fifth connecting element 27 and the fourth connecting element 26 through the fourth connecting element 26, so that the end of the rotary driving plate 202 close to the foot placing portion 3 rises relative to the fixed base plate 201 in height, and the included angle between the upper surface of the seat frame 21 and the ground is generally increased, so that the horizontal line of the lower leg of the user can be higher than the heart position to achieve the zero gravity state.

In this embodiment, through the aforesaid setting of each pin joint on the structural components such as first connecting piece 23, second connecting piece 24, third connecting piece 25 and rotation drive plate 202 for adjustment mechanism structure is more reasonable, realizes adjustment mechanism to the stable support and the wide-angle of seat frame 21 on the basis of using a small amount of structural components as far as possible and adjusts, reduces adjustment mechanism's complexity when reduce cost, the later maintenance of being convenient for, and can reduce adjustment mechanism's volume, reduce its space to account for than.

Further, the maximum angle change amount of the backrest connecting block 11 when adjusted between the extended posture and the lying posture is not less than 25 °, and the maximum angle change amount of the seat frame 21 when adjusted between the extended posture and the lying posture is not less than 5 °. In this embodiment, the angle between the right plane of the back connecting block 11 and the horizontal plane in fig. 4 and fig. 5 is not substantially changed, in this embodiment, the angle between the right plane of the back connecting block 11 and the horizontal plane in fig. 5 is 117 °, the angle between the right plane of the back connecting block 11 and the horizontal plane in fig. 6 is 166 °, and the angle is 49 °. In other embodiments, the angle variation is selected in a range of not less than 25 °, further 25 ° to 90 °, preferably in a range of 50 °, 55 °, 60 °. The seat frame 21 has an adjustment angle of 10 ° from the ground in the second stage, which is changed from 13 ° to 23 °. In other embodiments, the angular variation may be selected to be not less than 5 °, and may preferably be 8 °,10 °,15 °. Such angle change further provides the distance that descends for back 1 and has raised simultaneously and put foot 3 to finally make back 1 and put foot 3 to be close the level, make the user lie as far as possible when the appearance of lying and be level and user's shank water line can reach and even be higher than the heart position in order to reach zero gravity state, improved the comfort level of seating unit.

Further, the pin connecting assembly 30 includes a pin connecting block 31; in this embodiment, the height from the reference plane to the highest point of the foot placing connecting block 31 in the lying position is H2, H2=550mm, the height from the reference plane to the lowest point of the foot placing connecting block 31 in the sitting position is H1, H1=70mm, and the ratio of the two is H2: H1 ≈ 7.86. In this embodiment, the height of the lowest point of the foot placing connecting block 31 from the reference plane in a sitting posture is H1, and H1 is not more than 100mm; the height from the highest point to the reference plane when the foot placing connecting block 31 is in the lying position is H2, and H2 is not more than 600mm.

So set up and guaranteed when extending the appearance, put foot 3 and raised suitable distance for user's shank keeps good position of sitting in comfortable while, and when switching into the appearance of lying, put foot 3 and produce obvious raising, further lifting user's shank, let the user get into comfortable appearance state of lying as early as possible. In this embodiment, the rising distance of the foot placing connecting block 31 in the process of adjusting the stretching posture to the lying posture is not more than 300mm.

In this embodiment, in the sitting posture, the distance between the highest point of the backrest connecting block 11 and the reference plane is H5, H5 is not greater than 400mm, and in the lying posture, the distance between the highest point of the backrest connecting block 11 and the reference plane is H6, H6 is not greater than 320mm. With the arrangement, when the user changes from a sitting posture to a lying posture, the backrest part 1 has an obvious height difference, so that the upper body of the user sinks to an obvious extent, and the user can enter a comfortable state of the lying posture in a matching way with the obvious lifting of the foot placing part 3.

As shown in fig. 6 and 7, the backrest connecting assembly 10 further includes a backrest limiting block 12 and a backrest limiting rod 13, the backrest connecting block 11 is hinged to the backrest limiting block 12, and the backrest limiting block 12 is provided with a limiting surface 121 matched with the backrest limiting rod 13. Specifically, the backrest limiting block 12 is bifurcated and has two end portions, an upper end and a lower end, one end of the backrest connecting block 11 is hinged to the upper end of the backrest limiting block 12, the lower end of the backrest limiting block 12 is hinged between two end points of the backrest limiting rod 13,

the backrest connecting assembly 10 further comprises an eighth connecting piece 14 and a ninth connecting piece 15, one end of the ninth connecting piece 15 is hinged between two end points of the backrest connecting block 11, and the other end of the ninth connecting piece 15 is hinged to one end, close to the backrest connecting block 11, of the backrest limiting rod 13; the backrest limiting rod 13 is provided with a limiting protrusion 131, and the limiting surface 121 is arranged near the lower end of the backrest limiting block 12 and is matched with the limiting protrusion 131. Further, one end of the eighth connecting member 14 is hinged to the fixing base plate 201, and the other end is hinged to one end of the backrest limiting rod 13 away from the backrest connecting block 11. In the process of adjusting the stretching posture to the lying posture, the central point of the ninth connecting piece 15 moves downwards by a distance of 30 mm-100 mm. In this embodiment, the center point downward movement distance of the ninth connecting member 15 is 70mm, and in other preferred embodiments, the center point downward movement distance of the ninth connecting member 15 is 30mm, 60mm, or 80mm. The lowest point of the backrest part 1 when the posture is changed depends on the positions of the backrest stopper rod 13 and the backrest stopper 12. The backrest limiting rod 13 is a descending limiting rod, and descends along with the backrest 1 synchronously during adjustment, so that the descending space of the backrest 1 is larger, and the backrest is more easily approximately horizontal with the foot placing part 3.

In this embodiment, the hinge point between the backrest limiting rod 13 and the backrest limiting block 12 is 143.7mm away from the hinge point between the backrest limiting rod 13 and the eighth connecting member 14. The distance between the hinge point between the eighth connecting member 14 and the backrest limiting rod 13 and the hinge point between the eighth connecting member 14 and the fixed base plate 201 is not less than 90mm, in this embodiment, it is preferably 94.14mm, and in other embodiments, it may be 92mm, 95mm, or 98mm.

In this embodiment, the first and second adjustment phases are driven by the same drive source. Wherein, the driving source is connected with the backrest connecting component 10, and the output end of the driving source is connected with the foot placing connecting component 30. The driving source is a linear motor, the linear motor is provided with an output shaft, and the output shaft is connected with the foot placing connecting assembly 30. In the movement process, the output shaft of the linear motor pushes the foot placing connecting assembly 30, the foot placing connecting assembly 30 is hinged with the middle transmission assembly 20, therefore, the foot placing connecting assembly 30 rotates relative to the middle transmission assembly 20, after the foot placing connecting assembly 30 rotates to a certain fixed position, the foot placing connecting assembly 30 transmits a reaction force to the linear motor, under the driving of the reaction force, the foot placing connecting assembly 30 and the backrest connecting assembly 10 synchronously move, and finally the lying posture state is adjusted.

Example 2

This embodiment is an improvement of embodiment 1, and repeated descriptions are omitted here.

The first and second adjustment phases are driven by the same drive source. Wherein, the driving source is connected with the backrest connecting component 10, and the output end of the driving source is connected with the foot placing connecting component 30. The driving source is a cylinder, the cylinder comprises a piston rod, and the piston rod is connected with the foot placing connecting assembly 30. In the process of movement, a piston rod of the air cylinder pushes the foot placing connecting assembly 30, the foot placing connecting assembly 30 is hinged with the middle transmission assembly 20, therefore, the foot placing connecting assembly 30 rotates relative to the middle transmission assembly 20, after the middle transmission assembly rotates to a certain fixed position, the foot placing connecting assembly 30 transmits a reaction force to the air cylinder, under the driving of the reaction force, the foot placing connecting assembly 30 and the backrest connecting assembly 10 synchronously move, and finally the lying posture state is adjusted. Compared with a linear motor, the air cylinder is adjusted more rapidly and directly, rapid change of the seat posture can be achieved, the linear motor is more stable, and the air cylinder and the linear motor have the advantages.

Example 3

This embodiment is an improvement of embodiment 1, and repeated contents are not described herein again.

An elastic buffer device is arranged between the backrest limit block 12 and the backrest limit rod 13. In particular, the elastic buffer means is a spring. In other embodiments, the elastic device may be a sponge or the like that is elastic and capable of absorbing shock. The elastic buffer device is arranged to help the sofa reduce the impact of the head in the descending process, and the limiting block and the backrest limiting rod 13 can not rattle too much when colliding in the final state.

Example 4

This embodiment also has buffer, but has the difference with embodiment 3, and this embodiment sets up on the basis of embodiment 1, and back coupling assembling 10 still includes back stopper 12 and back gag lever post 13, and back connecting block 11 is articulated with back stopper 12, and back connecting block 11 and back stopper 12 are equipped with moment spring in the articulated department. The moment spring is preferably a leaf spring. The buffer device is arranged at the hinged position of the two parts, so that the impact of the seat on the human body in the adjusting process and the noise generated by collision in the limiting process can be reduced. In other possible embodiments, a damping device may be arranged between other key rotating parts.

All the embodiments described above provide seating units that are home sofas or leisure chairs or theatre seats or hospital seats or vehicle seats.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that modifications and embellishments may be made by those skilled in the art without departing from the principles of the present invention and are considered within the scope of the invention.

Claims (18)

1. An adjusting device for a seat unit is used for realizing the switching of the seat unit among a sitting posture, an extending posture and a lying posture, and is characterized by comprising a backrest connecting assembly (10), an intermediate transmission assembly (20) and a foot placing connecting assembly (30) which are sequentially connected;

the backrest connecting assembly (10) at least comprises a backrest connecting block (11);

the intermediate transmission assembly (20) at least comprises a seat frame (21) and an adjusting mechanism for adjusting the seat frame (21);

the adjusting mechanism comprises a first connecting piece (23), a first hinge hole (231), a second hinge hole (232) and a third hinge hole (233) are sequentially arranged on the first connecting piece (23), the distance between the first hinge hole (231) and the third hinge hole (233) is A1, the distance between the second hinge hole (232) and the third hinge hole (233) is A2, and the ratio of the A2 to the A1 is not more than 0.5;

the adjusting mechanism further comprises a fixed base plate (201) and a rotary driving plate (202) which are oppositely arranged, and two seventh connecting pieces (22) arranged between the seat frame (21) and the rotary driving plate (202); the rotary driving plate (202) is sequentially provided with a nine hinge hole (2021), a ten hinge hole (2022) and an eleven hinge hole (2023), wherein:

the hinge hole eleven (2023) is distributed close to the foot placing connecting assembly (30), the hinge hole nine (2021) is distributed close to the backrest connecting assembly (10), and the two seventh connecting pieces (22) are correspondingly hinged to the hinge hole eleven (2022) and the hinge hole eleven (2023) one by one;

the first hinge hole (231) and the ninth hinge hole (2021) are coaxial;

the distance between the hinge hole nine (2021) and the hinge hole ten (2022) is C1, the distance between the hinge hole nine (2021) and the hinge hole eleven (2023) is C2, and the ratio of C1 to C2 is not more than 0.35;

when the backrest connecting block (11) is adjusted between the stretching posture and the lying posture, the variation of an included angle between the side edge of the backrest connecting block (11) and the horizontal plane is not less than 25 degrees.

2. The adjusting device for a seat unit according to claim 1, wherein the adjusting mechanism further comprises a second connecting member (24) hinged to the first connecting member (23), and the second connecting member (24) is provided with a fourth hinge hole (241), a fifth hinge hole (242) and a sixth hinge hole (243) in sequence, wherein:

the fifth hinge hole (242) is coaxial with the third hinge hole (233);

the distance between the hinge hole four (241) and the hinge hole six (243) is B1, the distance between the hinge hole five (242) and the hinge hole six (243) is B2, and the ratio of B2 to B1 is not more than 0.5.

3. The adjusting device for a seat unit according to claim 2, wherein the adjusting mechanism further comprises a third connecting member (25) hinged to the second connecting member (24), and a hinge hole seven (251) and a hinge hole eight (252) are disposed on the third connecting member (25), wherein:

the hinge hole seven (251) and the hinge hole six (243) are coaxial;

the distance between hinge hole seven (251) and hinge hole eight (252) is no greater than 230mm.

4. An adjustment device for a seating unit according to claim 3, characterized in that between the stationary base plate (201) and the rotary drive plate (202) there are arranged said first (23), second (24) and third (25) connections, as well as a fourth (26), fifth (27) and sixth (28) connection;

the first connecting piece (23) is hinged to the rotary driving plate (202) through the first hinge hole (231);

the second connecting piece (24) is hinged to the fixed base plate (201) through the hinge hole four (241);

one end of the sixth connecting piece (28) is hinged to the second hinge hole (232), and the other end of the sixth connecting piece is hinged to one end of the fourth connecting piece (26);

the other end of the fourth connecting piece (26) is hinged to the fixed base plate (201);

one end of the fifth connecting piece (27) is hinged between two ends of the fourth connecting piece (26), and the other end is hinged to the rotary driving plate (202);

the third connecting piece (25) is hinged between two ends of the sixth connecting piece (28) through the hinge hole eight (252).

5. An adjustment device for a seat unit according to any of claims 2-4, characterized in that the footrest connection assembly (30) comprises a footrest connection block (31);

a rear mounting hole (2012) is formed in the fixed substrate (201), and a horizontal plane where the center of the rear mounting hole (2012) is located is defined as a reference plane;

when the backrest connecting block (11) is in a sitting position, the height between the lowest point of the foot placing connecting block (31) and the reference surface is H1, and H1 is not more than 100mm;

when the backrest connecting block is in a lying posture, the height from the highest point of the foot placing connecting block (31) to the reference plane is H2, and H2 is not more than 600mm.

6. An adjustment device for a seating unit according to claim 5, characterized in that the rising distance of the foot placing connection block (31) during adjustment of the extended position to the lying position is not more than 300mm.

7. An adjustment device for a seating unit according to claim 5, characterized in that the distance between the highest point of the backrest connecting block (11) and the reference plane is not more than 400mm in the sitting position and not more than 320mm in the lying position.

8. The adjusting device for the seat unit according to claim 7, wherein the backrest connecting assembly (10) further comprises a backrest limiting block (12), a backrest limiting rod (13) and a ninth connecting member (15), the backrest connecting block (11) is hinged to the backrest limiting block (12), one end of the ninth connecting member (15) is hinged between two end points of the backrest connecting block (11), the other end of the ninth connecting member is hinged to the backrest limiting rod (13), a limiting protrusion (131) is arranged on the backrest limiting rod (13), a limiting surface (121) matched with the limiting protrusion (131) is arranged on the backrest limiting block (12), and in the process of adjusting the stretching posture to the lying posture, the central point of the ninth connecting member (15) moves downwards by a distance of 30-100 mm.

9. An adjustment device for a seating unit according to claim 8, characterized in that an elastic damping device is provided between the backrest limiting block (12) and the backrest limiting rod (13).

10. An adjustment device for a seating unit according to claim 9, wherein the resilient cushioning means is a foam pad and/or a spring.

11. An adjustment device for a seating unit according to claim 1, characterized in that the amount of change of the angle between the side edge of the seat frame (21) and the horizontal plane when the seat frame (21) is adjusted between the extended position and the recumbent position is not less than 5 °.

12. An adjustment device for a seating unit according to claim 1, characterized in that the adjustment of the seating unit from the sitting position to the extended position is a first adjustment phase, the adjustment of the seating unit from the extended position to the lying position is a second adjustment phase, the first and second adjustment phases being driven by the same drive source.

13. An adjustment device for a seat unit according to claim 12, characterized in that the drive source is connected to the backrest connection unit (10) or the intermediate transmission unit (20), the output of which is connected to the footrest connection unit (30).

14. An adjustment device for a seat unit according to claim 12 or 13, characterized in that the drive source is a linear motor having an output shaft connected to the footrest attachment assembly (30).

15. An adjustment device for a seating unit according to claim 12 or 13, characterized in that the drive source is a cylinder with a piston rod connected to the footrest connection assembly (30).

16. An adjustment device for a seating unit according to claim 1, characterized in that the first link (23) comprises an extension a (234), an extension b (236) and a first transition c (235) connected in series, the extension a (234) and the extension b (236) being parallel, wherein:

the second hinge hole (232) and the third hinge hole (233) are disposed in the extension portion a (234), and the first hinge hole (231) is disposed in the extension portion b (236).

17. The adjustment device for a seating unit according to claim 2, wherein the second link (24) comprises an extension d (244), an extension e (246) and a second transition f (245) connected in series, the extension d (244) and the extension e (246) being parallel, wherein:

the fifth hinge hole (242) and the sixth hinge hole (243) are provided to the extension d (244), and the fourth hinge hole (241) is provided to the extension e (246).

18. A seating unit comprising a backrest part (1), a seat part (2), a footrest part (3) and an adjustment device for a seating unit according to any one of claims 1-17, wherein:

the backrest connecting block (11) is used for connecting the backrest part (1);

the seat frame (21) is used for connecting the seat part (2);

when the user lies down, the height difference between the highest point of the foot placing part (3) and the highest point of the backrest part (1) is not more than 400mm.

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