A chassis device for linkage between seat and backrest

Abstract

The present invention relates to the technical field of chairs, and in particular to a chassis device for linking a chair seat and a chair back. When the chassis device is changed from an initial state to a reclining state, the chair back tilts backward and drives a seesaw to rotate relative to a base, and a connecting rod rotates with the seesaw. During the rotation of the connecting rod, the transmission rod is driven to move backward on the base, and at the same time, the connecting rod drives a bracket to move backward on the transmission rod. The chair seat tilts along with the bracket, and the front end of the chair seat tilts upward. The rotation of the seesaw can synchronize the backward movement of the bracket, so that the chair seat can move backward to avoid an increase in the distance between the chair seat and the chair back, and the buttocks of a user can move backward with the chair seat to avoid an increase in the angle between the buttocks and the waist of the human body, thereby improving the back-rubbing feeling during the reclining process and avoiding a suspended feeling due to loss of waist support.

Description

Technical Field

[0001] The invention relates to the technical field of seats, in particular to a chassis device for linkage between a seat and a chair back. Background Art

[0002] With the quickening pace of life, people usually take a nap in the office in order to save commuting time. Usually, the chair structure in the office is fixed, and people can only lie on the desk to take a nap. However, sleeping on the stomach will affect blood circulation, cause arm numbness and soreness, and affect sleep. For this reason, reclining chairs have appeared on the market, which can adjust the backrest for people to lie down and rest.

[0003] For example, the patent with publication number CN216256271 U discloses a recliner, comprising a seat, a chair back, supporting legs and a footrest, wherein the chair back is hinged to the seat, the supporting legs are arranged below the seat, the footrest is rotatably arranged below the seat, and an adjustment component for adjusting the rotation angle of the footrest is also included, wherein the adjustment component comprises an adjustment plate and an adjustment rod, wherein the adjustment plate is arranged below the seat, the adjustment rod is connected to the footrest, and a plurality of gear slots for the adjustment rod to be inserted are arranged in sequence along the rotation direction of the footrest. People can lie down on the recliner by adjusting the chair back and the footrest for convenient rest.

[0004] The problem with the above technology is that when the chair back is tilted, the front-to-back distance between the chair back and the seat will change, and the chair back and the user's back will be relatively displaced and rubbed, causing discomfort. When the user is tilting, the lumbar support at the chair back is separated from the human waist, and a suspended gap is directly formed between the two, resulting in the chair back losing support for the human waist in the tilted state, and the waist has a suspended feeling, so that the human spine cannot be effectively supported, resulting in many health problems caused by sitting for a long time, and the user cannot relax well when resting.

[0005] To this end, the present application provides a chassis device for linking a seat and a backrest to solve the above-mentioned technical problems. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a chassis device for the linkage of a seat and a backrest, so that when the backrest is tilted, the seat can move backward to avoid the increase of the distance between the seat and the backrest, so that the user's buttocks can move backward with the seat, avoid the increase of the angle between the buttocks and the waist of the human body, improve the feeling of rubbing the back during the leaning back process, and avoid the feeling of hanging due to the loss of support of the waist.

[0007] The technical solution adopted by the present invention to solve the problem is: a chassis device for the linkage of a seat and a chair back, comprising a base and a rocker, the rocker is used to install an external chair back, and the rocker is rotatably connected to the base; a connecting rod, the connecting rod is fixedly connected to the rocker; a bracket, the bracket is used to install an external seat, and the bracket is rotatably connected to the connecting rod; a transmission rod, the transmission rod is rotatably connected to the connecting rod, the transmission rod is slidably connected to the base, and the bracket is slidably connected to the transmission rod.

[0008] As a further improvement of the above technical solution, a first sliding groove is provided on the base, a first sliding rod is provided on the transmission rod, and the first sliding rod is slidably connected to the first sliding groove; a second sliding groove is provided on the transmission rod, a second sliding rod is provided on the bracket, and the second sliding rod is slidably connected to the second sliding groove.

[0009] As a further improvement of the above technical solution, it also includes a return spring, which is installed inside the base and connected to the first sliding rod.

[0010] As a further improvement of the above technical solution, it also includes a damper, which is installed inside the base and is transmission-connected to the first sliding rod.

[0011] As a further improvement of the above technical solution, it also includes a handle, and the handle is transmission-connected to the return spring.

[0012] As a further improvement of the above technical solution, a first connecting protrusion is provided on the connecting rod, and the first connecting protrusion is rotatably connected to the transmission rod.

[0013] As a further improvement of the above technical solution, a second connecting protrusion is provided on the bracket, and the second connecting protrusion is rotatably connected to the connecting rod.

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

[0015] As a further improvement of the above technical solution, a gas rod is installed on the base.

[0016] The beneficial effect of the present invention is that when the chassis device is changed from an initial state to a reclining state, the chair back tilts backward and drives the seesaw to rotate relative to the base, the connecting rod rotates with the seesaw, and during the rotation of the connecting rod, the transmission rod is driven to move backward on the base, and at the same time, the connecting rod drives the bracket to move backward on the transmission rod, and the seat tilts along with the bracket so that the front end of the seat tilts up, and the rotation of the seesaw can synchronize the bracket to move backward, so that the seat can move backward to avoid an increase in the distance between the seat and the chair back, and the user's buttocks can move backward with the seat to avoid an increase in the angle between the human body's buttocks and waist, thereby improving the back-rubbing feeling during the reclining process and avoiding a suspended feeling due to loss of support for the waist. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a structural diagram of the seat of the present invention in an initial state;

[0019] Figure 2 It is a structural diagram of the seat of the present invention in a reclining state;

[0020] Figure 3 It is a structural diagram of the chassis device of the present invention in an initial state;

[0021] Figure 4 is a cross-sectional view of the chassis device of the present invention in an initial state;

[0022] Figure 5 An exploded view of the chassis device of the present invention;

[0023] Figure 6 It is a structural diagram of the chassis device of the present invention in a reclining state;

[0024] Figure 7 It is a cross-sectional view of the chassis device of the present invention in a reclining state;

[0025] Figure 8 It is a comparison diagram of the chassis device of the present invention in the initial state and the reclining state;

[0026] Fig. 9 It is the internal structure diagram of the base of the present invention.

[0027] In the figure: 1-base, 11-first slide groove, 2-rocker, 3-connecting rod, 31-first connecting protrusion, 32-limiting groove, 4-bracket, 41-second slide rod, 42-second connecting protrusion, 5-transmission rod, 51-first slide rod, 52-second slide groove, 6-reset spring, 7-damper, 8-handle, 91-gas rod, 92-backrest, 93-seat. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, the meaning of "several" is one or more, the meaning of "more" is more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of the first and the second, it is only for the purpose of distinguishing the technical features, and it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. In the description of the present invention, unless otherwise clearly defined, the terms such as "set", "install", and "connect" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in the present invention in combination with the specific content of the technical solution.

[0031] Reference Figures 1 to 9 A chassis device for the linkage of a seat and a backrest, comprising a base 1 and a seesaw 2, the seesaw 2 is used to install an external seat back 92, and the front end of the seesaw 2 is rotatably connected to the rear end of the base 1; a connecting rod 3, the bottom of the connecting rod 3 is fixedly connected to the upper surface of the seesaw 2; a bracket 4, the bracket 4 is used to install an external seat 93, and the rear end of the bracket 4 is rotatably connected to the upper end of the connecting rod 3; a transmission rod 5, the rear end of the transmission rod 5 is rotatably connected to the lower end of the connecting rod 3; the front end of the transmission rod 5 is slidably connected to the front end of the base 1, and the front end of the bracket 4 is slidably connected to the front end of the transmission rod 5;

[0032] When the chassis device is changed from the initial state to the reclining state, the chair back 92 tilts backward and drives the rocker 2 to rotate relative to the base 1, and the connecting rod 3 rotates with the rocker 2. During the rotation of the connecting rod 3, the transmission rod 5 is driven to move backward on the base 1. At the same time, the connecting rod 3 drives the bracket 4 to move backward on the transmission rod 5, and the seat 93 tilts along with the bracket 4, so that the front end of the seat 93 tilts up. The rotation of the rocker 2 can synchronize the backward movement of the bracket 4, so that the seat 93 can move backward to avoid the increase of the distance between the seat 93 and the chair back 92, so that the user's buttocks can move backward with the seat 93, avoid the increase of the angle between the human body's buttocks and waist, improve the back rubbing feeling during the reclining process, and avoid the waist losing support and causing a suspended feeling.

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

[0034] In the preferred embodiment, a return spring 6 is further included. The return spring 6 is installed inside the base 1, and the front end of the return spring 6 is connected to the first slide bar 51;

[0035] The return spring 6 can elastically deform in response to the backward movement of the rocker 2 , so as to provide a return elastic force for the rocker 2 .

[0036] In the preferred embodiment, a damper 7 is further included. The damper 7 is installed inside the base 1, and the front end of the damper 7 is transmission-connected to the first slide bar 51;

[0037] When the user leans back, the damper 7 can slow down the movement speed of the transmission rod 5, thereby slowing down the rotation speed of the rocker 2, so that the chair back 92 can slowly tilt backward, preventing the user from feeling weightless when leaning back, and the damper 7 can make the transmission rod 5 hover at any position, thereby making the chair back 92 hover at any position.

[0038] In a preferred embodiment, a handle 8 is further included, and an end of the handle 8 is transmission-connected to the return spring 6;

[0039] The stretching tension of the return spring 6 can be adjusted by the handle 8, so as to provide different sizes of reclining return elasticity for users of different weights.

[0040] In a preferred embodiment, a first connecting protrusion 31 inclined upward is provided at the lower end of the connecting rod 3 , and the first connecting protrusion 31 is rotatably connected to the rear end of the transmission rod 5 .

[0041] In a preferred embodiment, a second connecting protrusion 42 is provided at the rear end of the bracket 4 , and the second connecting protrusion 42 is rotatably connected to the upper end of the connecting rod 3 .

[0042] In a preferred embodiment, a limiting groove 32 is provided on the inner side surface of the upper end of the connecting rod 3 , and the second connecting protrusion 42 is located in the limiting groove 32 . The limiting groove 32 can limit the rotation angle of the second connecting protrusion 42 .

[0043] In a preferred embodiment, a gas rod 91 is installed on the base 1 .

[0044] Effect:

[0045] When the chassis device is changed from the initial state to the reclining state, the seat back 92 tilts backward and drives the rocker 2 to rotate relative to the base 1, and the connecting rod 3 rotates with the rocker 2, so that the first connecting protrusion 31 drives the first slide bar 51 on the transmission rod 5 to move along the rear end of the first slide groove 11. At this time, the first slide bar 51 can compress the return spring 6, and the first slide bar 51 can be suspended at any position in the first slide groove 11 through the damper 7, so that the seat back 92 and the seat 93 can be suspended at any position; at the same time, during the rotation of the connecting rod 3, the connecting rod 3 will drive the bracket 4 to move backward, so that the second slide bar 41 on the bracket 4 moves along the rear end of the second slide groove 52, so that the bracket 4 moves backward and approaches the rocker 2, so that the seat 93 can move backward and approach the seat back 92;

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

[0047] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A chassis device for linkage between a seat and a backrest, characterized in that: include: A base (1) and a seesaw (2), wherein the seesaw (2) is used to mount an external chair back (92), and the seesaw (2) is rotatably connected to the base (1); A connecting rod (3), wherein the connecting rod (3) is fixedly connected to the rocker plate (2); A bracket (4), the bracket (4) being used to mount a seat (93) of an external device, the bracket (4) being rotatably connected to the connecting rod (3); A transmission rod (5), wherein the transmission rod (5) is rotatably connected to the connecting rod (3), the transmission rod (5) is slidably connected to the base (1), and the bracket (4) is slidably connected to the transmission rod (5).

2. A chassis device for linkage between a seat and a backrest as claimed in claim 1, characterized in that: The base (1) is provided with a first slide groove (11), the transmission rod (5) is provided with a first slide rod (51), and the first slide rod (51) is slidably connected to the first slide groove (11); The transmission rod (5) is provided with a second sliding groove (52), the bracket (4) is provided with a second sliding rod (41), and the second sliding rod (41) is slidably connected to the second sliding groove (52).

3. A chassis device for linkage between a seat and a backrest as claimed in claim 2, characterized in that: It also includes a return spring (6), which is installed inside the base (1) and connected to the first sliding rod (51).

4. A chassis device for linkage between a seat and a backrest as claimed in claim 3, characterized in that: It also includes a damper (7), which is installed inside the base (1) and is transmission-connected to the first sliding rod (51).

5. A chassis device for linkage between a seat and a backrest as claimed in claim 3, characterized in that: It also comprises a handle (8), wherein the handle (8) is transmission-connected to the return spring (6).

6. A chassis device for linkage between a seat and a backrest as claimed in claim 2, characterized in that: The connecting rod (3) is provided with a first connecting protrusion (31), and the first connecting protrusion (31) is rotatably connected to the transmission rod (5).

7. A chassis device for linkage between a seat and a backrest as claimed in claim 2, characterized in that: The bracket (4) is provided with a second connecting protrusion (42), and the second connecting protrusion (42) is rotatably connected to the connecting rod (3).

8. A chassis device for linkage between a seat and a backrest as claimed in claim 7, characterized in that: The connecting rod (3) is provided with a limiting groove (32), and the second connecting protrusion (42) is located in the limiting groove (32).

9. A chassis device for linkage between a seat and a backrest as claimed in claim 1, characterized in that: A gas rod (91) is mounted on the base (1).

Images