Linkage structure of cushion and backrest

Abstract

The utility model relates to the field of furniture structures, in particular to a cushion and backrest linkage structure which comprises a base used for being connected with chair legs or steam rods and keeping the position fixed, a cushion piece used for installing a cushion and a main backrest piece used for installing a backrest, the main backrest piece is rotationally connected with a main sliding rod, and the main sliding rod is slidably connected to the base along a set track. An auxiliary sliding rod is connected to the base in a sliding mode along a set track, the auxiliary sliding rod is rotationally connected with an auxiliary backrest piece used for being connected with a backrest, the auxiliary sliding rod and the main sliding rod are matched so that the included angle between the main backrest piece and the cushion can be increased, and a distance exists between the straight lines where the auxiliary sliding rod and the main sliding rod are located. The main sliding rod is rotationally connected with a pushed part used for pushing the cushion to be away from the backrest, the cushion part moves in the base along a set track and is rotationally connected with the cushion, the moving direction of the cushion part and the sliding direction of the main sliding rod are located in the same plane, and the rotating axis direction of the cushion part and the rotating axis direction of the main backrest part are the same. When a user leans on the backrest backwards, the cushion can be far away from the backrest, so that the gravity center of the user is not easy to excessively move backwards, and the possibility that the user topples over is reduced.

Description

Technical Field

[0001] The present application relates to the field of furniture structures, and in particular to a linkage structure of a seat cushion and a backrest. Background Art

[0002] The backrest chair can provide support for the user to lean back to a certain extent while the user sits on it, so that the user can lean back while maintaining a sitting posture, thereby improving comfort.

[0003] The existing multifunctional reclining chair with announcement number CN201150376Y has a seat cushion and a chair, and the angle between the seat cushion and the chair can be adjusted to a larger angle so that the user can obtain a larger reclining angle.

[0004] In the above-mentioned related art, when a user sits on a backrest chair and leans back at a relatively fast speed, the overall center of gravity of the user and the backrest chair moves backward, making it easy for the user to fall on the backrest chair. Utility Model Content

[0005] In order to reduce the possibility of a user falling over when leaning back, the present application provides a linkage structure between a seat cushion and a backrest.

[0006] The present application provides a seat cushion and backrest linkage structure that adopts the following technical solution.

[0007] The seat cushion and the backrest are connected to each other by a main sliding rod, and the main sliding rod is connected to the base along a predetermined trajectory. The base is slidably connected to a secondary sliding rod along a predetermined trajectory. The secondary sliding rod is rotatably connected to a secondary backrest member connected to the backrest. The secondary sliding rod cooperates with the main sliding rod to increase the angle between the main backrest member and the seat cushion. There is a spacing between the secondary sliding rod and the main sliding rod. The main sliding rod is rotatably connected to a pushed member for pushing the seat cushion away from the backrest. The seat cushion member moves along a predetermined trajectory in the base and is rotatably connected to the seat cushion. The moving direction of the seat cushion member and the sliding direction of the main sliding rod are located in the same plane, and the direction of the rotation axis of the seat cushion member is the same as the direction of the rotation axis of the main backrest member.

[0008] By adopting the above technical solution, when the user leans back on the backrest, the main backrest member and the auxiliary backrest member are forced to move accordingly, so that the angle between the backrest and the seat cushion becomes larger, and the main backrest member is provided with one end of the main sliding rod to force the pushed member to move synchronously, so that while the angle between the backrest and the seat cushion increases, the distance between the seat cushion and the backrest will also increase, making it difficult for the user's overall center of gravity to move excessively toward one side of the backrest, reducing the possibility of the user tipping over.

[0009] Optionally, two main backrest members are provided, and the base is slidably connected to the adjacent side surfaces of the two main backrest members in a one-to-one correspondence with the two opposite side surfaces.

[0010] By adopting the above technical solution, the two main backrest parts can be closely attached to the base and move more stably.

[0011] Optionally, one main sliding rod is provided for each of the two main backrest members.

[0012] By adopting the above technical solution, the situation where a single main sliding rod penetrates the base can be avoided, the overall strength of the base is improved, and it is not easy to affect the settings of other mechanisms in the base.

[0013] Optionally, one pushed member is provided corresponding to each of the two main sliding rods, and the two side surfaces of the two pushed members that are close to and / or far away from each other are slidably connected to the base.

[0014] By adopting the above technical solution, the movement of the two pushed members in the base is directionally restricted, the stability of the movement of the pushed members is improved, and the seat cushion can move stably driven by the two pushed members.

[0015] Optionally, two auxiliary backrest members are provided, and the two auxiliary backrest members are slidably connected to the base at opposite sides.

[0016] By adopting the above technical solution, the backrest can withstand greater force when the user leans on it.

[0017] Optionally, one secondary sliding rod is provided and passes through two secondary backrest members.

[0018] By adopting the above technical solution, the two auxiliary backrest parts can move synchronously.

[0019] Optionally, the base is rotatably connected to a buffer member for buffering the movement of the backrest, and the buffer member is a damping rod or a gas spring.

[0020] By adopting the above technical solution, the user is not likely to lean back too fast, thereby improving the user's stability during the leaning process.

[0021] Optionally, the buffer component is rotatably connected to the auxiliary sliding rod, and the buffer component is connected to one end of the auxiliary sliding rod and is located between two auxiliary backrest components.

[0022] By adopting the above technical solution, the buffer parts can share the auxiliary sliding rod, thereby reducing the number of parts.

[0023] Optionally, the movement trajectories of the main slide bar and the auxiliary slide bar are arc-shaped and the centers of the two movement trajectories are the same, and the center of the movement trajectory of the main slide bar is located at the side where the pushed member is connected to the seat cushion.

[0024] By adopting the above technical solution, both the main slide bar and the auxiliary slide bar can perform a relatively stable arc-shaped movement, so that the process of the user leaning back against the backrest is also relatively stable.

[0025] Optionally, two cushion parts are provided, and the base is detachably connected to a guide rail for directional sliding of the cushion parts.

[0026] By adopting the above technical solution, the seat cushion bears the main weight of the user. Compared with the method of providing a slide groove in the base for the seat cushion to slide, directly providing a guide rail can make the seat cushion move more stably.

[0027] In summary, the present application includes at least one of the following beneficial effects:

[0028] The user's overall center of gravity is not easily moved excessively toward one side of the backrest, thereby reducing the possibility of the user tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the top view of the upper part of the base of the present application;

[0030] Figure 2 It is a schematic diagram of the upward structure of one end of the main backrest member arranged at the bottom of the base.

[0031] Explanation of the reference numerals: 1. base; 2. cushion member; 3. main backrest member; 31. main slide rod; 32. buffer member; 33. secondary slide rod; 34. secondary backrest member; 35. thrust member; 36. guide rail; 37. main slideway; 38. secondary slideway. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings.

[0033] The present application embodiment discloses a linkage structure between a seat cushion and a backrest, referring to Figure 1 , including a base 1 detachably connected to a chair leg or a gas pole, etc., a seat cushion is installed on the top of the base 1 and a backrest is installed on one side.

[0034] Reference Figure 1The base 1 is provided with main backrest parts 3 on both sides of the vertically opposite sides, and the two main backrest parts 3 are fixedly connected to the backrest. The two main backrest parts 3 are sleeved and rotatably connected with main slide bars 31. The rotation axis direction of the main backrest parts 3 is the same as the axis direction of the backrest rotation forced by the user's backward leaning. The base 1 is provided with arc-shaped main slideways 37 on both sides of the opposite sides, and the center of the main slideway 37 faces the side where the seat cushion is set on the base 1. The two main slide bars 31 are slidably connected to the two main slideways 37 in a one-to-one correspondence. At the same time, two auxiliary slideways 38 are provided in the base 1. The auxiliary slideways 38 are arc-shaped and the center of the circle is the same as the center of the main slideway 37. In this embodiment, the radius of the auxiliary slideway 38 is consistent with the radius of the main slideway 37. The two auxiliary slides 38 are slidably connected with the same auxiliary slide bar 33, and two auxiliary backrest parts 34 are rotatably connected at both ends of the auxiliary slide bar 33. The two auxiliary backrest parts 34 are fixedly connected to the backrest, and the axial direction of the auxiliary slide bar 33 is the same as the axial direction of the main slide bar 31, but the axes of the auxiliary slide bar 33 and the main slide bar 31 are different. In this embodiment, the axial height of the auxiliary slide bar 33 is higher than the axial height of the main slide bar 31, so that when the user leans on the backrest, the angle between the backrest and the seat cushion can be appropriately increased, and the end of the backrest connected to the main backrest part 3 can move toward the center of the base 1.

[0035] In other implementations of this embodiment, the auxiliary slide 38 and the main slide 37 may be replaced by arc-shaped slide rails.

[0036] Reference Figure 1 , the two main slide bars 31 are coaxially connected to the push member 35 at one end thereof, the push member 35 is fixedly connected to the seat cushion, and the base 1 is detachably connected to two guide rails 36 at the side away from the push member 35, and the two guide rails 36 are slidably connected to the seat cushion member 2, and the moving direction of the seat cushion member 2 and the sliding direction of the main slide bar 31 are located in the same plane. In this embodiment, the closer the guide rail 36 is to the center of the base 1, the lower the height is. The two seat cushion members 2 are rotatably connected to the side of the seat cushion away from the push member 35, and the rotation axis direction of the seat cushion member 2 is the same as the axis direction of the main slide bar 31. When the user leans on the backrest, the end of the seat cushion connected to the main backrest member 3 moves toward the center of the base 1, so that the seat cushion member 2 moves away from the center of the base 1, so that when the backrest rotates when the user leans back, the seat cushion can move synchronously in the direction away from the backrest, so that the user's center of gravity is not easily moved backward excessively.

[0037] In other implementations of this embodiment, the guide rail 36 can be replaced by a sliding groove provided on the base 1 .

[0038] Reference Figure 2A buffer member 32 is hinged at the bottom of the base 1 near its center. The buffer member 32 can be a damping rod or a gas spring, etc. The buffer member 32 is not connected to the base 1 and is rotatably connected to the auxiliary slide bar 33. The buffer member 32 is located between two auxiliary backrest members 34, so that the backrest is not easy to rotate too quickly when the user leans against the backrest.

[0039] The implementation principle of the linkage structure between a seat cushion and a backrest in an embodiment of the present application is as follows: when a user sits on the seat cushion and leans back, the main slide bar 31 and the auxiliary slide bar 33 move in a directional manner, so that the angle between the backrest and the seat cushion becomes larger, while the backrest connected to one end of the main backrest part 3 moves to force the seat cushion away from the backrest, so that the user's overall center of gravity is not easily moved backward excessively.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A seat cushion and backrest linkage structure, comprising a base (1) for connecting a chair leg or a gas rod and maintaining a fixed position, a seat cushion member (2) for mounting the seat cushion, and a main backrest member (3) for mounting the backrest, characterized in that: The main backrest member (3) is rotatably connected to a main slide bar (31), and the main slide bar (31) is slidably connected to the base (1) along a predetermined track. A secondary slide bar (33) is slidably connected to the base (1) along a predetermined track. The secondary slide bar (33) is rotatably connected to a secondary backrest member (34) for connecting to the backrest. The secondary slide bar (33) cooperates with the main slide bar (31) so that the angle between the main backrest member (3) and the seat cushion is increased. There is a distance between the secondary slide bar (33) and the main slide bar (31). The main slide bar (31) is rotatably connected to a pushed member (35) for pushing the seat cushion away from the backrest. The seat cushion member (2) moves along a predetermined track in the base (1) and is rotatably connected to the seat cushion. The moving direction of the seat cushion member (2) and the sliding direction of the main slide bar (31) are located in the same plane. The rotation axis direction of the seat cushion member (2) is the same as the rotation axis direction of the main backrest member (3).

2. The seat cushion and backrest linkage structure according to claim 1, characterized in that: Two main backrest members (3) are provided, and the base (1) is slidably connected to the adjacent side surfaces of the two main backrest members (3) in a one-to-one corresponding manner on two opposite side surfaces.

3. The seat cushion and backrest linkage structure according to claim 2, characterized in that: One main sliding rod (31) is provided for each of the two main backrest parts (3).

4. The seat cushion and backrest linkage structure according to claim 3, characterized in that: One of the push-receiving members (35) is provided corresponding to each of the two main sliding rods (31), and the two side surfaces of the two push-receiving members (35) that are close to and / or far from each other are slidably connected to the base (1).

5. The seat cushion and backrest linkage structure according to claim 1, characterized in that: Two auxiliary backrest parts (34) are provided, and the two auxiliary backrest parts (34) are slidably connected to the base (1) at opposite sides.

6. The seat cushion and backrest linkage structure according to claim 5, characterized in that: One auxiliary sliding rod (33) is provided and passes through two auxiliary backrest parts (34).

7. The seat cushion and backrest linkage structure according to claim 5, characterized in that: The base (1) is rotatably connected to a buffer component (32) for buffering the movement of the backrest, and the buffer component (32) is a damping rod or a gas spring.

8. The seat cushion and backrest linkage structure according to claim 7, characterized in that: The buffer member (32) is rotatably connected to the auxiliary slide rod (33); one end of the buffer member (32) connected to the auxiliary slide rod (33) is located between the two auxiliary backrest members (34).

9. The seat cushion and backrest linkage structure according to claim 1, characterized in that: The moving tracks of the main slide bar (31) and the auxiliary slide bar (33) are arc-shaped and have the same center. The center of the moving track of the main slide bar (31) is located at the side where the push member (35) is connected to the seat cushion.

10. The seat cushion and backrest linkage structure according to claim 1, characterized in that: Two cushion components (2) are provided, and the base (1) is detachably connected to a guide rail (36) for the cushion components (2) to slide in a directional manner.

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