Sofa backrest displacement locking structure and sofa

Abstract

The utility model discloses a sofa backrest displacement locking structure and a sofa, and the sofa backrest displacement locking structure comprises a track with a limiting rack on one side; the moving frame is arranged outside the track in a sleeving manner and can move relative to the track; the limiting piece is arranged on the movable frame and provided with limiting teeth matched with the limiting racks; the limiting piece is actuated, and the limiting piece can move relative to the track, so that the displacement locking structure can be converted from a first state in which the limiting rack and the limiting teeth are matched for limiting to a second state in which the limiting rack and the limiting teeth are not matched for limiting, and the displacement locking structure can be unlocked from the first state in which the limiting rack and the limiting teeth are matched for limiting. And the sofa backrest can move back and forth to meet the requirements of people with different heights on adjustable seat depth of the sofa.

Description

Technical Field

[0001] The utility model relates to the technical field of home furnishings, in particular to a sofa backrest displacement locking structure and a sofa. Background Art

[0002] Sofas are commonly used household products, generally including a seat, backrest and headrest, which can be used for sitting or lying down. In order to meet the different needs of users for sitting depth, a two-position rotation function is added to the backrest, but the front and back push-pull function parts on the market currently only have the front and back positions, and the sofa backrest needs to be manually lifted and then pushed and pulled forward and backward. The sofa backrest is heavy, and the operation process is laborious and cumbersome, which greatly affects the user experience. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a sofa backrest displacement locking structure and a sofa, so that the sofa backrest can be moved forward and backward to meet the needs of people of different heights for adjustable sofa seat depth.

[0004] The utility model adopts the following technical solutions:

[0005] A sofa backrest displacement locking structure comprises: a track, one side of which is provided with a limit rack; a moving frame, which is sleeved outside the track and can move relative to the track; a limit piece, which is arranged on the moving frame and has a limit tooth matching the limit rack; when an actuation action is performed on the limit piece, the limit piece can move relative to the track, so that the displacement locking structure can be transformed from a first state in which the limit rack cooperates with the limit tooth to a second state in which the limit rack is released from the limit tooth. In the second state, the sofa backrest can move forward and backward to meet the needs of people of different heights for adjustable sofa seat depth, and the structure is simple and the cost is low.

[0006] Preferably, the limiting member is rotatably engaged with the moving frame, and rotating the limiting member can make the limiting tooth disengage from the limiting rack, which is convenient for manual operation by the user.

[0007] Preferably, the track is fixedly arranged on the bottom frame to achieve fixed installation of the track.

[0008] Preferably, a torsion spring is further provided on the movable frame, one end of which is connected to the limiting member. In the first state, the torsion spring limits the limiting tooth from falling out of the limiting rack, thereby improving the stability of the limiting member and preventing the limiting member from rotating due to a small external force.

[0009] Preferably, the movable frame is provided with a first limiting protrusion and a second limiting protrusion which are staggered, and one end of the torsion spring is located between the first limiting protrusion and the second limiting protrusion, so as to facilitate the connection of one end of the torsion spring.

[0010] Preferably, a limiting groove is provided on the limiting member, and the other end of the torsion spring is located in the limiting groove, which can effectively limit the limiting tooth from escaping from the limiting rack and facilitate the installation of the torsion spring.

[0011] Preferably, a backrest connecting frame is provided on the limiting member for connecting the backrest assembly.

[0012] A sofa comprises: a sofa base provided with a sofa backrest displacement locking structure; a seat cushion, a surface of which is provided with a yielding groove; a backrest component located on the seat cushion and connected to a limiting piece or a backrest connecting frame, and the backrest component is pressed down, so that the backrest component can move forward and backward to meet the needs of people of different heights for adjustable sofa seat depth, and the structure is simple and the cost is low.

[0013] Preferably, the backrest assembly is actuated so that the limiting member can move relative to the track, so that the displacement locking structure can be transformed from the first state to the second state.

[0014] Compared with the prior art, the utility model has the following advantages: the utility model provides a sofa backrest displacement locking structure. When in use, the limiting member can move relative to the track, so that the displacement locking structure can be transformed from a first state in which the limiting rack cooperates with the limiting tooth to a second state in which the limiting rack is released from the limiting cooperation with the limiting tooth. In the second state, the sofa backrest can move forward and backward to meet the needs of people of different heights for adjustable sofa seat depth. The structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of the shift locking structure.

[0016] Figure 2 It is a partial structural schematic diagram of the shift locking structure.

[0017] Figure 3 for Figure 2 A partial enlarged view of part A.

[0018] Figure 4 Schematic diagram of the exploded structure of the track and the limiter.

[0019] Figure 5 This is a structural diagram of a sofa.

[0020] Figure 6 This is a partial structural diagram of a sofa.

[0021] In the figure, the track 1, the limiting rack 1-1, the moving frame 2, the first limiting protrusion 2-1, the second limiting protrusion 2-2, the limiting member 3, the limiting tooth 3-1, the limiting groove 3-2, the bottom frame 4, the torsion spring 5, the backrest connecting frame 6, the sofa base 7, the cushion 8, the making way groove 8-1, and the backrest assembly 9. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the technical solution of the utility model, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] like Figure 1-2 As shown, a sofa backrest displacement locking structure comprises:

[0025] The track 1 has a limiting rack 1-1 on one side, which is fixedly arranged on the bottom frame 4;

[0026] The moving frame 2 is sleeved outside the track 1 and can move relative to the track 1;

[0027] like Figure 4 As shown, the limiting member 3 is arranged on the moving frame 2 and has a limiting tooth 3-1 matching the limiting rack 1-1;

[0028] The displacement locking structure has a first state and a second state. In the first state, the limit rack 1-1 cooperates with the limit tooth 3-1 to limit, and the movable frame 2 cannot move; in the second state, the limit rack 1-1 releases the cooperation with the limit tooth 3-1, and the movable frame 2 can move relative to the track 1.

[0029] The limiting member 3 is actuated so that the limiting member 3 can move relative to the track 1 , so that the displacement locking structure can be transformed from the first state to the second state, so that the moving frame 2 can move relative to the track 1 .

[0030] Among them, the limiting member 3 is rotatably engaged with the moving frame 2 through the rotating shaft 3-3. Therefore, in this embodiment, rotating the limiting member 3 can make the limiting tooth 3-1 disengage from the limiting rack 1-1, thereby releasing the engagement between the limiting rack 1-1 and the limiting tooth 3-1.

[0031] The bottom frame 4 is a rectangular frame structure, and tracks 1, a movable frame 2 and a limit member 3 are provided on the left and right sides of the bottom frame 4. A backrest connecting frame 6 is provided between the limit members 3 on the left and right sides. The backrest connecting frame 6 is used to connect the backrest components. By rotating the backrest connecting frame 6, the limit members 3 on the left and right sides can be rotated synchronously. At this time, the movable frame 2 can be moved relative to the track 1 by pushing the backrest connecting frame 6.

[0032] like Figure 2-3As shown, the movable frame 2 is also provided with a torsion spring 5, one end of which is connected to the limiting member 3, and the movable frame 2 is provided with a first limiting protrusion 2-1 and a second limiting protrusion 2-2 which are staggered, one end of the torsion spring 5 is located between the first limiting protrusion 2-1 and the second limiting protrusion 2-2, and the limiting member 3 is provided with a limiting groove 3-2, and the other end of the torsion spring 5 is located in the limiting groove 3-2. In the first state, the torsion spring 5 abuts against the limiting groove 3-2 to prevent the limiting tooth 3-1 from escaping from the limiting rack 1-1.

[0033] like Figure 5-6 As shown, a sofa comprises:

[0034] The sofa base 7 comprises a common frame structure, on which the sofa backrest displacement locking structure is provided;

[0035] The seat cushion 8 is arranged on the sofa base 7, and a recess 8-1 matching the backrest connecting frame 6 is provided on the surface of the seat cushion 8;

[0036] A backrest assembly 9, located on the seat cushion 8 and connected to the backrest connecting frame 6;

[0037] When in use, the backrest assembly 9 is pressed downward so that the backrest assembly 9 rotates around the rotating shaft 3-3, and the limit member 3 can move relative to the track 1, so that the displacement locking structure can be transformed from the first state to the second state. At this time, the backrest assembly 9 can move with the movement of the moving frame 2. After pushing the backrest assembly 9 to the required position, release the pressed backrest assembly 9, so that the backrest assembly 9 returns to the initial reclining angle, and the displacement locking structure returns to the first state.

[0038] Example 2

[0039] The difference between Example 2 and Example 1 is that the limit member 3 is slidably fitted on the moving frame 2, and the moving frame 2 has a sliding groove. When in use, pressing the limit member 3 downward can make the limit tooth 3-1 disengage from the limit rack 1-1, thereby releasing the fitting limit between the limit rack 1-1 and the limit tooth 3-1. At this time, the moving frame 2 can move relative to the track 1.

[0040] Example 3

[0041] The difference between Example 3 and Example 1 is that the backrest assembly 9 is directly connected to the limit member 3. When in use, the backrest assembly 9 is pressed down to make the limit tooth 3-1 disengage from the limit rack 1-1, thereby releasing the matching limit between the limit rack 1-1 and the limit tooth 3-1. At this time, the movable frame 2 can move relative to the track 1.

[0042] The above are only preferred embodiments of the present invention. The protection scope of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall also be regarded as the protection scope of the present invention.

Claims

1. A sofa backrest displacement locking structure, characterized in that: include: A track (1) having a limiting rack (1-1) on one side; A moving frame (2) is sleeved outside the track (1) and is movable relative to the track (1); A limiting member (3) is arranged on the movable frame (2) and has a limiting tooth (3-1) matching the limiting rack (1-1); By performing an actuation action on the limiting member (3), the limiting member (3) can move relative to the track (1), so that the displacement locking structure can be transformed from a first state in which the limiting rack (1-1) and the limiting tooth (3-1) cooperate to limit the position to a second state in which the limiting rack (1-1) is no longer limited by the limiting tooth (3-1).

2. The sofa backrest displacement locking structure according to claim 1, characterized in that: The limiting member (3) is rotatably engaged with the moving frame (2), and the rotation of the limiting member (3) can cause the limiting tooth (3-1) to escape from the limiting rack (1-1).

3. The sofa backrest displacement locking structure according to claim 1, characterized in that: The track (1) is fixedly arranged on the bottom frame (4).

4. The sofa backrest displacement locking structure according to claim 1, characterized in that: The movable frame (2) is also provided with a torsion spring (5), one end of which is connected to the limiting member (3). In the first state, the torsion spring (5) limits the limiting tooth (3-1) from falling out of the limiting rack (1-1).

5. The sofa backrest displacement locking structure according to claim 4, characterized in that: The movable frame (2) is provided with a first limiting protrusion (2-1) and a second limiting protrusion (2-2) which are arranged in a staggered manner, and one end of the torsion spring (5) is located between the first limiting protrusion (2-1) and the second limiting protrusion (2-2).

6. The sofa backrest displacement locking structure according to claim 5, characterized in that: The limiting member (3) is provided with a limiting groove (3-2), and the other end of the torsion spring (5) is located in the limiting groove (3-2).

7. The sofa backrest displacement locking structure according to claim 1, characterized in that: The limiting member (3) is provided with a backrest connecting frame (6).

8. A sofa, characterized in that: include: A sofa base (7) provided with a sofa backrest displacement locking structure as claimed in any one of claims 1 to 7; A seat cushion (8) having a surface provided with a clearance groove (8-1); A backrest assembly (9) is located on the seat cushion (8) and connected to the limiting member (3) or the backrest connecting frame (6).

9. The sofa according to claim 8, characterized in that: By performing an actuation action on the backrest assembly (9), the limiting member (3) can move relative to the track (1), so that the displacement locking structure can be transformed from the first state to the second state.

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