Self-locking mechanism of seat angle adjuster

Abstract

The utility model belongs to the technical field of manual recliners, particularly relates to a self-locking mechanism of a seat recliner, and provides the following scheme that the self-locking mechanism comprises a handle rotationally connected with a backrest framework and a rotating arm rotationally connected with a seat basin framework through a connecting shaft, and the handle is connected with the rotating arm through a tension spring; the handle is connected with the end of the tension spring in a hooked mode through an upper hanging lug, and the connecting shaft is connected with the other end of the tension spring in a hooked mode through a clamping mechanism clamped in the connecting shaft. Through the arrangement of the plug-in assembly and the guide groove assembly, after the tension spring is hooked with the upper hanging lug, the tension spring can be directly hooked with the lower hanging lug, the plug-in assembly is inserted into the guide assembly after the hooking is finished, the stress area of the plug-in assembly is larger than that of the end part of the tension spring, and the plug-in assembly is easier to stress to form a stress arm; therefore, the other end of the tension spring can be quickly limited.

Description

Technical field:

[0001] This utility model relates to the field of manual seat adjuster technology, and in particular to a self-locking mechanism for a seat adjuster. Background technology:

[0002] An adjuster is a device installed on a car seat to adjust the angle of the seat back. This device generally consists of a backrest connecting plate, a seat connecting plate, a core component, a handwheel or adjustment handle, and a return spring (in some low-cost seats, the backrest connecting plate and seat connecting plate are integrated into the backrest frame and seat frame).

[0003] In the existing technology, when installing a manual angle adjuster, it is necessary to limit both ends of the tension spring, and the tension spring should be in a properly stretched state at this time. Therefore, the operation method is generally to first hook one end of the tension spring to the upper hanging ear, and then use a tool to stretch the tension spring and hook the other end of the tension spring to the lower hanging ear. This method is inefficient during installation. Utility model content:

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a self-locking mechanism for a seat adjuster, thereby resolving the problems mentioned in the background section.

[0005] A self-locking mechanism for a seat adjuster includes a handle rotatably connected to a backrest frame and a rotating arm rotatably connected to a seat frame via a connecting shaft. The handle and the rotating arm are connected by a tension spring, and the ends of the handle and the tension spring are hooked together by an upper hook. The connecting shaft is hooked to the other end of the tension spring via an internal locking mechanism. The locking mechanism includes a plug-in assembly and a guide groove assembly. The guide groove assembly is formed in the inner cavity of the connecting shaft, which has a hollow structure with one end open. The guide groove assembly includes a straight groove and an arc-shaped groove. The straight groove is formed on one side of the inner circumference of the connecting shaft and extends along the direction of the connecting shaft. The arc-shaped groove is formed at the inner wall end of the connecting shaft, and one end of the arc-shaped groove is connected to one end of the straight groove. The arc-shaped groove has a quarter-circle arc structure.

[0006] By adopting the above technical solution, the snap-fit ​​mechanism can assist in the installation of the tension spring and improve the installation efficiency of the tension spring.

[0007] The plug-in assembly includes a plug-in shaft that is plugged into the inner cavity of the connecting shaft. The outer circumference of the plug-in shaft is integrally formed with an outwardly protruding block, and the protruding block is slidably connected to the guide groove assembly.

[0008] By adopting the above technical solution and setting the plug-in component, the rapid limiting of the other end of the tension spring is achieved.

[0009] The end of the plug shaft away from the connecting shaft is formed with a lower hanging lug that hooks onto one end of the tension spring.

[0010] By adopting the above technical solution, the lower hanging ear is hooked to one end of the tension spring, thereby restricting one end of the tension spring.

[0011] The rotatable connection between the seat frame and the backrest frame is rotatably connected by a rotating shaft. The outer wall of the rotating shaft is connected to a limiting ring. The outer periphery of the limiting ring is formed with an outer limiting tooth. One side of the rotating arm is formed with an inner limiting tooth that meshes with the outer limiting tooth.

[0012] By adopting the above technical solution, the cooperation between the inner and outer limiting teeth achieves self-locking of the backrest.

[0013] The upper part of one end of the rotating arm is formed with an outwardly protruding pressure shaft, and the handle is provided with a compression groove for squeezing the pressure shaft.

[0014] By adopting the above technical solution, the rotation of the handle achieves the effect of driving the rotating arm to rotate.

[0015] The annular portion at one end of the handle is rotatably connected to the outer wall of the rotating shaft.

[0016] By adopting the above technical solution, the handle rotates around the end of the ring as the center when it is rotated.

[0017] The beneficial effects of the self-locking mechanism of this utility model seat adjuster are:

[0018] By setting up a plug-in component and a guide groove component, after the tension spring is hooked to the upper hanging ear, the tension spring can be directly hooked to the lower hanging ear. After hooking, the plug-in component is inserted into the guide component. The force-bearing area of ​​the plug-in component is larger than that of the tension spring end, making it easier to form a force arm and thus assisting in quickly completing the limiting of the other end of the tension spring. Description of the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the self-locking mechanism of the seat adjuster proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the back structure of the self-locking mechanism of the seat adjuster proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the locking mechanism of the self-locking mechanism of the seat adjuster proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the internal structure of the locking mechanism of the self-locking mechanism of the seat adjuster proposed in this utility model.

[0023] In the diagram: 1. Handle; 2. Limiting ring; 3. Pressure shaft; 4. Extrusion groove; 5. Upper hanging ear; 6. Rotating arm; 7. Connecting shaft; 8. Insertion shaft; 9. Tension spring; 10. Lower hanging ear; 11. Straight groove; 12. Arc groove; 13. Protruding block. Specific implementation method:

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0025] Reference Figures 1 to 4 A self-locking mechanism for a seat adjuster includes a handle 1 rotatably connected to the backrest frame and a rotating arm 6 rotatably connected to the seat frame via a connecting shaft 7. One end of the handle 1 has an annular portion rotatably connected to the outer wall of the rotating shaft. The handle 1 and the rotating arm 6 are connected by a tension spring 9. The ends of the handle 1 and the tension spring 9 are hooked together by an upper hook lug 5. The connecting shaft 7 is hooked to the other end of the tension spring 9 via an internal locking mechanism. The locking mechanism includes a plug-in assembly and a guide groove assembly. The guide groove assembly is formed in... The inner cavity of the connecting shaft 7 is a hollow structure with one end open. The guide groove assembly includes a straight groove 11 and an arc groove 12. The straight groove 11 is opened on one side of the inner circumference of the connecting shaft 7 and is opened along the extension direction of the connecting shaft 7. The arc groove 12 is opened at the end of the inner wall of the connecting shaft 7, and one end of the arc groove 12 is connected to one end of the straight groove 11. The arc groove 12 has a quarter-circle arc structure. The end of the insertion shaft 8 away from the connecting shaft 7 is formed with a lower hanging lug 10 that is hooked to one end of the tension spring 9.

[0026] When the backrest tilt angle needs to be adjusted, pull handle 1 to rotate it upwards. At the same time, handle 1 drives the upper hanging ear 5 to move synchronously. At this time, the upper hanging ear 5 pulls the tension spring 9 to extend. The tension spring 9 is stretched, thereby separating the rotating arm 6 from the limiting ring 2 and unlocking the limiting ring 2. When the backrest angle is adjusted, remove the force applied to handle 1. At this time, the tension spring 9 returns to its original position. The returned tension spring 9 pulls handle 1 to rotate to the initial position. At this time, the rotating arm 6 engages with the limiting ring 2 again, completing the limitation of the limiting ring 2.

[0027] During the assembly of the backrest and the seat, the plug-in component is inserted into the inner cavity of the connecting shaft 7. In this process, the plug-in component first slides into the straight groove 11. When the plug-in component slides to the end of the straight groove 11, the plug-in component mates with the arc groove 12 and rotates into the arc groove 12, thus completing the positioning of the plug-in component and simultaneously completing the installation of the tension spring 9. In this way, the installation of the tension spring 9 can be completed relatively efficiently.

[0028] The plug-in assembly includes a plug-in shaft 8 that is plugged into the inner cavity of the connecting shaft 7. The outer circumference of the plug-in shaft 8 is integrally formed with an outwardly protruding protrusion 13, which is slidably connected to the guide groove assembly.

[0029] First, align the plug shaft 8 with the inner cavity of the connecting shaft 7 and align the protruding block 13 with the straight groove 11. Then, push the plug shaft 8 into the connecting shaft 7. The plug shaft 8 drives the protruding block 13 to move along the straight groove 11. When the protruding block 13 moves to the end of the straight groove 11, remove the force applied to the plug shaft 8. At this time, the tension spring 9 is reset by the plug shaft 8, which drives the protruding block 13 to rotate along the arc groove 12 until the protruding block 13 rotates to one end of the inner wall of the arc groove 12 and abuts against it, thus completing the fixation of the tension spring 9.

[0030] The rotatable connection between the seat frame and the backrest frame is rotatably connected by a rotating shaft. The outer wall of the rotating shaft is connected to a limiting ring 2. The outer periphery of the limiting ring 2 is formed with an outer limiting tooth, and one side of the rotating arm 6 is formed with an inner limiting tooth that meshes with the outer limiting tooth.

[0031] When the rotating arm 6 is in contact with the limiting ring 2, the outer limiting tooth and the inner limiting tooth are in a meshing state. At this time, the limiting ring 2 cannot rotate, so the backrest is in a self-locking state.

[0032] The upper part of one end of the rotating arm 6 is formed with an outwardly protruding pressure shaft 3, and the handle 1 is provided with a pressing groove 4 for pressing the pressure shaft 3.

[0033] When the handle 1 is rotated upward, the handle 1 drives the squeezing groove 4 to move synchronously. The moving squeezing groove 4 squeezes the pressure shaft 3. At this time, the pressure shaft 3 drives the rotating arm 6 to rotate away from the limiting ring 2. Therefore, the rotating arm 6 drives the inner limiting tooth to separate from the outer limiting tooth, and the backrest can then rotate.

[0034] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A self-locking mechanism of a seat recliner, comprising a handle (1) rotatably connected to a backrest frame and a rotating arm (6) rotatably connected to a seat frame via a connecting shaft (7), characterized in that; The handle (1) and the rotating arm (6) are connected via a tension spring (9), the handle (1) and the end of the tension spring (9) are hooked together via an upper hanging ear (5), and the connecting shaft (7) is hooked together with the other end of the tension spring (9) via a clamping mechanism engaged therein; The clamping mechanism comprises a plug-in assembly and a guide groove assembly. The guide groove assembly is arranged in the inner cavity of the connecting shaft (7). The connecting shaft (7) is a hollow structure with one end being open. The guide groove assembly comprises a straight groove (11) and an arc groove (12). The straight groove (11) is arranged on one side of the inner periphery of the connecting shaft (7), and the straight groove (11) is arranged along the extension direction of the connecting shaft (7). The arc groove (12) is arranged at the end of the inner wall of the connecting shaft (7), and one end of the arc groove (12) is connected to one end of the straight groove (11). The arc groove (12) is a quarter arc structure.

2. The self-locking mechanism of the seat recliner according to claim 1, characterized in that: The plug-in assembly comprises a plug-in shaft (8) plugged into the inner cavity of the connecting shaft (7), the outer circumference of the plug-in shaft (8) is integrally formed with a protruding block (13) protruding outward, and the protruding block (13) is slidably connected to the guide groove assembly.

3. The self-locking mechanism of the seat recliner according to claim 2, characterized in that: One end of the plug-in shaft (8) away from the connecting shaft (7) is formed with a lower hanging ear (10) which is hooked with one end of the tension spring (9).

4. The self-locking mechanism of the seat recliner according to claim 3, characterized in that: The rotational connection between the seat basin frame and the backrest frame is rotationally connected via a rotating shaft, the outer wall of the rotating shaft is connected to a limit ring (2), the outer periphery of the limit ring (2) is formed with external limit teeth, and one side of the rotating arm (6) is formed with internal limit teeth meshing with the external limit teeth.

5. The self-locking mechanism of the seat recliner according to claim 4, characterized in that: A pressure-bearing shaft (3) protruding outward is formed on the upper portion of one end of the rotating arm (6), and an extrusion groove (4) for extruding the pressure-bearing shaft (3) is provided on the handle (1).

6. The self-locking mechanism of the seat recliner according to claim 5, characterized in that: The annular portion at one end of the handle (1) is rotatably connected to the outer wall of the rotating shaft.

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