Chassis device for linkage of chair seat and chair back

Abstract

The utility model relates to the technical field of seats, in particular to a chassis device for linkage of a seat and a chair back, when the chassis device is converted into a backward leaning state from an initial state, a mounting frame backwards leans along with the chair back and drives a seesaw to rotate relative to a base, a connecting rod rotates along with the seesaw, and the connecting rod drives a transmission rod to backwards move on the base in the rotating process; meanwhile, the connecting rod can drive the support to move backwards on the transmission rod, the chair seat inclines along with the support so that the front end of the chair seat can be warped upwards, the warped plate rotates and can synchronously move backwards along with the support, the chair seat can move backwards so that the distance between the chair seat and the chair back can be prevented from being increased, and the buttocks of the user can move backwards along with the chair seat; included angles between human buttocks and waists are prevented from being increased, back rubbing feeling in the backward leaning process is improved, and suspension feeling caused by the fact that the waists lose support is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chairs, in particular to a chassis device for linkage of a seat and a backrest. BACKGROUND

[0002] With the acceleration of the pace of life, in order to save commuting time, people usually take a break in the office, and the chair structure in the office is usually fixed, so people can only lie on the desk for a break, but lying down to sleep will affect blood circulation, cause arm numbness, and affect sleep, so there are recliners on the market that can adjust the backrest for people to recline and rest.

[0003] For example, the patent with publication number CN216256271 U discloses a recliner, which comprises a seat, a backrest, support legs and a footrest, the backrest is hingedly arranged with the seat, the support legs are arranged below the seat, the footrest is rotatably arranged below the seat, and the recliner further comprises an adjusting assembly for adjusting the rotation angle of the footrest, the adjusting assembly comprises an adjusting plate and an adjusting rod, the adjusting plate is arranged below the seat, the adjusting rod is connected with the footrest, and a plurality of gear grooves for clamping the adjusting rod are arranged on the adjusting plate in the rotation direction of the footrest.

[0004] The above-mentioned technology has the following problems: when the backrest is inclined, the distance between the backrest and the seat changes, the backrest and the user's back relative displacement and friction occur, which causes discomfort, so that the user's waist in the backrest is separated from the human body during the inclination process, and a suspension gap is formed between the two, which causes the backrest to lose support for the human waist in the inclined state, the waist has a suspended feeling, so that the human spine cannot be effectively supported, resulting in many health problems of long sitting, and the rest cannot be well relaxed.

[0005] Therefore, the present application provides a chassis device for linkage of a seat and a backrest to solve the above-mentioned technical problems. SUMMARY

[0006] To solve the above-mentioned technical problems, the purpose of the present application is to provide a chassis device for linkage of a seat and a backrest, when the backrest is inclined, the seat can move backward to avoid the distance between the seat and the backrest increasing, so that the user's hips can move backward with the seat, avoiding the angle between the human hips and the waist increasing, improving the backrest feeling during the backrest process and avoiding the waist losing support and producing a suspended feeling.

[0007] The technical scheme adopted by the present application to solve the problem is: a chassis device for linkage of a chair seat and a chair back, comprising a base and a rocker plate, the rocker plate being rotationally connected with the base, the rocker plate being fixedly connected with a mounting rack, the mounting rack being used for mounting an external chair back, a connecting rod, the connecting rod being fixedly connected with the rocker plate, a support, the support being used for mounting an external chair seat, the support being rotationally connected with the connecting rod, a transmission rod, the transmission rod being rotationally connected with the connecting rod, the transmission rod being slidably connected with the base, and the support being slidably connected with the transmission rod.

[0008] As a further improvement of the above technical scheme, the base is provided with a first sliding groove, the transmission rod is provided with a first sliding rod, the first sliding rod being slidably connected with the first sliding groove, the transmission rod is provided with a second sliding groove, and the support is provided with a second sliding rod, the second sliding rod being slidably connected with the second sliding groove.

[0009] As a further improvement of the above technical scheme, the device further comprises a reset spring, the reset spring being installed inside the base, and the reset spring being connected with the first sliding rod.

[0010] As a further improvement of the above technical scheme, the device further comprises a damper, the damper being installed inside the base, and the damper being in transmission connection with the first sliding rod.

[0011] As a further improvement of the above technical scheme, the device further comprises a handle, the handle being in transmission connection with the reset spring.

[0012] As a further improvement of the above technical scheme, the connecting rod is provided with a first connecting protrusion, the first connecting protrusion being in rotational connection with the transmission rod.

[0013] As a further improvement of the above technical scheme, the support is provided with a second connecting protrusion, the second connecting protrusion being in rotational connection with the connecting rod.

[0014] As a further improvement of the above technical scheme, the connecting rod is provided with a limiting groove, and the second connecting protrusion is located in the limiting groove.

[0015] As a further improvement of the above technical scheme, the base is installed with an air rod.

[0016] The beneficial effects of the present application are: when the chassis device is converted from the initial state to the backward leaning state, the mounting frame inclines backward with the chair back and drives the rocker plate to rotate relative to the base, the connecting rod rotates with the rocker plate, the connecting rod drives the transmission rod to move backward on the base during the rotation process, at the same time, the connecting rod drives the support to move backward on the transmission rod, the chair seat inclines with the support to make the front end of the chair seat tilt upward, the rotation of the rocker plate can synchronize the backward movement of the support, so that the chair seat can move backward to avoid the increase of the distance between the chair seat and the chair back, so that the user's hips can move backward with the chair seat, avoiding the increase of the angle between the hips and the waist, improving the back rubbing feeling during the backward leaning process and avoiding the feeling of floating due to the lack of support of the waist. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further explained and described in connection with the accompanying drawings and specific embodiments.

[0018] Figure 1 is the structural diagram of the seat in the initial state of the present application;

[0019] Figure 2 is the structural diagram of the seat in the backward leaning state of the present application;

[0020] Figure 3 is the structural diagram of the chassis device in the initial state of the present application;

[0021] Figure 4 is the sectional view of the chassis device in the initial state of the present application;

[0022] Figure 5 is the exploded view of the chassis device of the present application;

[0023] Figure 6 is the structural diagram of the chassis device in the backward leaning state of the present application;

[0024] Figure 7 is the sectional view of the chassis device in the backward leaning state of the present application;

[0025] Figure 8 is the comparison diagram of the chassis device in the initial state and the backward leaning state of the present application;

[0026] Figure 9 is the internal structure diagram of the base of the present application.

[0027] In the figure: 1-base, 11-first sliding groove, 2-rocker plate, 3-connecting rod, 31-first connecting protrusion, 32-limiting groove, 4-support, 41-second sliding rod, 42-second connecting protrusion, 5-transmission rod, 51-first sliding rod, 52-second sliding groove, 6-return spring, 7-damper, 8-handle, 91-air rod, 92-chair back, 93-chair seat, 94-mounting frame. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be described in detail below, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part of the description, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In the description of the present application, several meanings are one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are not included in the number, and the above, below, etc. are understood to include the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features. In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0031] Reference Figures 1 to 9 A chassis device for linkage of chair seat and back, comprising a base 1 and a rocker plate 2, the front end of the rocker plate 2 is rotatably connected with the rear end of the base 1, the rocker plate 2 is fixedly connected with a mounting frame 94, the mounting frame 94 is used for mounting an external chair back 92; a connecting rod 3, the bottom of the connecting rod 3 is fixedly connected with the upper surface of the rocker plate 2; a support 4, the support 4 is used for mounting an external chair seat 93, the rear end of the support 4 is rotatably connected with the upper end of the connecting rod 3; a transmission rod 5, the rear end of the transmission rod 5 is rotatably connected with the lower end of the connecting rod 3; the front end of the transmission rod 5 is slidably connected with the front end of the base 1, the front end of the support 4 is slidably connected with the front end of the transmission rod 5;

[0032] When the base device is turned from the initial state to the backward tilting state, the mounting frame 94 is tilted backward with the chair back 92 and drives the rocker plate 2 to rotate relative to the base 1. The connecting rod 3 rotates with the rocker plate 2, and the connecting rod 3 drives the transmission rod 5 to move backward on the base 1 during the rotation. At the same time, the connecting rod 3 drives the bracket 4 to move backward on the transmission rod 5. The chair seat 93 is tilted with the bracket 4, so that the front end of the chair seat 93 is tilted upward. The rotation of the rocker plate 2 can synchronize the backward movement of the bracket 4, so that the chair seat 93 can move backward to avoid the distance between the chair seat 93 and the chair back 92 from increasing. The user's hips can move backward with the chair seat 93, so as to avoid the angle between the hips and the waist from increasing, improve the back rubbing feeling during the backward tilting process, and avoid the waist from losing support and feeling suspended.

[0033] In the preferred embodiment, the front end of the base 1 is provided with a first sliding groove 11, the front end of the transmission rod 5 is provided with a first sliding rod 51, and the first sliding rod 51 is slidingly connected to the first sliding groove 11. The front end of the transmission rod 5 is provided with a second sliding groove 52, and the front end of the bracket 4 is provided with a second sliding rod 41. The second sliding rod 41 is slidingly connected to the second sliding groove 52.

[0034] In the preferred embodiment, a reset spring 6 is further included, which is installed in the interior of the base 1. The front end of the reset spring 6 is connected to the first sliding rod 51.

[0035] The reset spring 6 can be elastically deformed to correspond to the backward tilting action of the rocker plate 2, so as to provide the rocker plate 2 with a reset elastic force.

[0036] In the preferred embodiment, a damper 7 is further included, which is installed in the interior of the base 1. The front end of the damper 7 is in transmission connection with the first sliding rod 51.

[0037] When the user tilts backward, the damper 7 can slow down the movement speed of the transmission rod 5, so as to slow down the rotation speed of the rocker plate 2, and the chair back 92 can be slowly tilted backward. The damper 7 can make the transmission rod 5 hover at any position, so as to make the chair back 92 hover at any position.

[0038] In the preferred embodiment, a handle 8 is further included, and the end of the handle 8 is in transmission connection with the reset spring 6.

[0039] The handle 8 can adjust the stretching tension degree of the reset spring 6, so as to provide different sizes of tilting recovery elastic force for users with different weights.

[0040] In the preferred embodiment, the lower end of the connecting rod 3 is provided with a first connection protrusion 31 that is inclined upward, and the first connection protrusion 31 is in rotation connection with the rear end of the transmission rod 5.

[0041] In the preferred embodiment, the rear end of the bracket 4 is provided with a second connection protrusion 42 that is in rotation connection with the upper end of the connecting rod 3.

[0042] In the preferred embodiment, the inner side of the upper end of the connecting rod 3 is provided with a limiting groove 32, and the second connecting protrusion 42 is located in the limiting groove 32, so that the rotation angle of the second connecting protrusion 42 can be limited by the limiting groove 32.

[0043] In the preferred embodiment, the base 1 is provided with an air rod 91.

[0044] Use effect:

[0045] When the base device is turned from the initial state to the backward tilting state, the mounting frame 94 is tilted backward with the chair back 92 and drives the rocker plate 2 to rotate relative to the base 1, and the connecting rod 3 is rotated with the rocker plate 2, so that the first connecting protrusion 31 drives the first sliding rod 51 on the transmission rod 5 to move along the rear end of the first sliding groove 11, at this time, the first sliding rod 51 can compress the return spring 6, and the first sliding rod 51 can be suspended at any position in the first sliding groove 11 through the damper 7, so that the chair back 92 and the chair seat 93 are suspended at any position; at the same time, in the rotating process, the connecting rod 3 drives the bracket 4 to move backward, so that the second sliding rod 41 on the bracket 4 moves along the rear end of the second sliding groove 52, and the bracket 4 moves backward and approaches the rocker plate 2, so that the chair seat 93 can move backward and approach the chair back 92.

[0046] When the user gets off the seat, the restoring force of the return spring 6 can drive the first sliding rod 51 to move along the front end of the first sliding groove 11, so that the transmission rod 5 moves forward and drives the first connecting protrusion 31 to move forward, so that the rocker plate 2 rotates relative to the base 1; at the same time, the connecting rod 3 drives the bracket 4 to move forward, so that the second sliding rod 41 on the bracket 4 moves along the front end of the second sliding groove 52, and the bracket 4 moves forward until the chair seat 93 and the chair back 92 return to the initial state.

[0047] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct or indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A chassis device for linkage of a seat and a back, characterized by, The utility model relates to a chair back and seat linkage base device which comprises a base (1) and a rocker (2) rotatably connected with the base (1), a mounting rack (94) fixedly connected with the rocker (2) and used for mounting an external chair back (92), a connecting rod (3) fixedly connected with the rocker (2), a support (4) rotatably connected with the connecting rod (3) and used for mounting an external chair seat (93), a transmission rod (5) rotatably connected with the connecting rod (3) and slidably connected with the base (1), and the support (4) is slidably connected with the transmission rod (5).

2. The chair back and seat linkage base device according to claim 1, wherein the base (1) is provided with a first sliding groove (11), the transmission rod (5) is provided with a first sliding rod (51) slidably connected with the first sliding groove (11), the transmission rod (5) is provided with a second sliding groove (52), and the support (4) is provided with a second sliding rod (41) slidably connected with the second sliding groove (52).

3. The chair back and seat linkage base device according to claim 2, further comprising a reset spring (6) installed in the base (1) and connected with the first sliding rod (51).

4. The chair back and seat linkage base device according to claim 3, further comprising a damper (7) installed in the base (1) and in transmission connection with the first sliding rod (51).

5. The chair back and seat linkage base device according to claim 3, further comprising a handle (8) in transmission connection with the reset spring (6).

6. The chair back and seat linkage base device according to claim 2, wherein the connecting rod (3) is provided with a first connecting protrusion (31) rotatably connected with the transmission rod (5).

7. The chair back and seat linkage base device according to claim 2, wherein the support (4) is provided with a second connecting protrusion (42) rotatably connected with the connecting rod (3).

8. The chair back and seat linkage base device according to claim 7, wherein the connecting rod (3) is provided with a limiting groove (32) in which the second connecting protrusion (42) is located.

9. The chair back and seat linkage base device according to claim 1, wherein the base (1) is provided with an air rod (91). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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