Angle adjuster

Abstract

The utility model belongs to the technical field of automobile seat accessories. The angle adjuster solves the problem that an angle adjuster in the prior art is poor in use reliability. The angle adjuster comprises a shell provided with a toothed plate in the circumferential direction and a driving shaft provided with a cam, a coil spring is arranged between the shell and the driving shaft, the toothed plate is provided with a groove allowing a convex claw of the cam to be embedded, and the inner side wall of the groove sequentially comprises a first receding section and an unlocking section from a groove opening to the groove bottom. The outer side wall of the groove sequentially comprises a locking section and a second clearance section from the groove opening to the groove bottom, the inner side wall and the outer side wall of the convex claw are provided with an unlocking convex part and a locking convex part respectively, when the locking convex part is located on the locking section, the locking convex part and the outer side wall of the groove are in a contact state all the time, and the unlocking convex part and the inner side wall of the groove are in a separation state all the time; when the unlocking protruding part is located on the unlocking section, the unlocking protruding part and the inner side wall of the groove are in a contact state all the time, and the locking protruding part and the outer side wall of the groove are in a separated state all the time. The method has the advantage of improving the use reliability of the angle regulator.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seat accessories and relates to a recliner. Background Art

[0002] A recliner is a device installed on a car seat to adjust the inclination angle of the backrest to enable the occupant to achieve a comfortable sitting position. Existing recliners usually include a pair of toothed plates, namely multiple small toothed plates and a toothed disc. By applying force to a transmission component such as a shaft, a cam plate is acted on, which in turn acts on the pair of toothed plates, causing the multiple small toothed plates to disengage from the toothed discs at the same time, thereby achieving adjustment of the seat back. Conversely, by removing the force applied to the transmission component, the multiple small toothed plates are engaged with the toothed disc at the same time due to the rebound force of the spring, thereby achieving the locking function of the recliner.

[0003] However, due to the limited manufacturing precision of the small tooth plates and the sprocket disc, during the process of unlocking and locking the recliner, multiple small tooth plates cannot disengage from the sprocket disc or engage with the sprocket disc at the same time due to asynchronous movement, resulting in the recliner being unable to be correctly unlocked or locked, resulting in a poor user experience. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems in the existing technology and to provide a recliner. The technical problem to be solved by the present invention is how to improve the reliability of the recliner.

[0005] The purpose of this utility model can be achieved through the following technical solutions:

[0006] A recliner comprises a housing and a drive shaft rotatably plugged into the housing, wherein the inner side wall of the housing is provided with internal teeth, the drive shaft is provided with a cam, the side wall of the cam has a plurality of circumferentially arranged protruding claws, and the housing is provided with a plurality of tooth plates arranged in a one-to-one correspondence with the protruding claws along the circumference, characterized in that a coil spring is provided between the housing and the drive shaft for keeping the tooth plate and the inner teeth of the housing engaged, the tooth plate has a groove for the protruding claw to be embedded, and the groove includes a first avoidance section and an unlocking section in sequence from the groove opening to the groove bottom on the side wall close to the drive shaft, The side wall of the groove away from the drive shaft includes a locking section and a second avoidance section in sequence from the groove mouth to the groove bottom, and the inner side wall and outer side wall of the claw are respectively provided with an unlocking protrusion and a locking protrusion. When the locking protrusion is located in the locking section, the locking protrusion and the side wall of the groove away from the drive shaft are always in a contact state, and the unlocking protrusion and the side wall of the groove close to the drive shaft are always in a separated state; when the unlocking protrusion is located in the unlocking section, the unlocking protrusion and the side wall of the groove close to the drive shaft are always in a contact state, and the locking protrusion and the side wall of the groove away from the drive shaft are always in a separated state.

[0007] Under the action of the coil spring, the recliner is in a normally locked state. The setting of the unlocking section and the locking section of the recliner can respectively increase the movement stroke of the unlocking and locking processes of the recliner, so that the movement trajectories of multiple tooth plates can be adjusted and normalized within this movement stroke. Specifically, when one of the tooth plates reaches the predetermined movement trajectory, for example, the tooth plate has been engaged with the inner teeth of the shell, then the pawl corresponding to the tooth plate can no longer further push the tooth plate to move in the direction of engagement with the inner teeth of the shell during the movement, and can only maintain the current engagement state. When the remaining tooth plates have not yet engaged with the inner teeth of the shell, the pawls corresponding to the remaining tooth plates can continue to push them in the direction of engagement with the inner teeth of the shell until all the tooth plates are engaged with the inner teeth of the shell. The principle of disengagement between the tooth plate and the inner teeth of the shell is consistent with the above process, thereby ensuring the synchronization of the locking and unlocking actions of multiple tooth plates, so that the recliner can always be correctly unlocked or locked, thereby improving the reliability of the recliner.

[0008] In the aforementioned recliner, the distance between the unlocking section and the drive shaft is greater than the distance between the first clearance section and the drive shaft. A first transition section is provided between the first clearance section and the unlocking section, connecting the two. The distance between the locking section and the drive shaft is less than the distance between the second clearance section and the drive shaft. A second transition section is provided between the locking section and the second clearance section, connecting the two. When the recliner is operating, the first and second clearance sections function as a way to give way. The provision of the first and second transition sections allows for a smoother transition between the unlocking and locking travels of the recliner.

[0009] In the aforementioned recliner, the housing includes a plurality of circumferentially spaced limit blocks, with each toothed plate positioned between two adjacent limit blocks. The bottoms of the plurality of protruding claws are integrally connected to the cam. The limit blocks within the housing restrict the circumferential movement of the toothed plate, thereby enabling the protruding claws of the cam to better drive the toothed plate's inward and outward movement, thereby enabling the toothed plate to better engage or disengage with the housing's internal teeth. Furthermore, the bottoms of the plurality of protruding claws are integrally connected to the cam, enabling the cam to support the toothed plate, thereby better ensuring that the toothed plate moves along a predetermined trajectory.

[0010] In the aforementioned recliner, a bushing is disposed between the drive shaft and the cam, the outer wall of the drive shaft having an annular protrusion, and the outer wall of the bushing having a first annular step portion and a second annular step portion connected in sequence along the axial direction. The end of the bushing adjacent to the second annular step portion abuts against the annular protrusion, the first annular step portion abuts against the cam, and the coil spring is sleeved between the second annular step portion and the cam. The provision of the annular protrusion and the first annular step portion ensures the stability of the bushing installation, and the second annular step portion on the bushing facilitates the installation of the coil spring and the limiting of the coil spring after installation. The provision of the bushing also facilitates the installation and use of the recliner.

[0011] In the above-mentioned recliner, the housing has a boss, one end of the coil spring is fixed to the bushing, and the other end is fixed to the boss. The above structure can facilitate the disassembly and assembly of the coil spring and ensure the stability of the coil spring.

[0012] In the above-mentioned recliner, the drive shaft and cam are made of metal, and the bushing is made of plastic. The bushing made of plastic can reduce noise, and the drive shaft and cam are made of metal to ensure the structural strength of the recliner.

[0013] Compared with the existing technology, the advantage of this recliner is that the setting of the unlocking section and the locking section of this recliner can respectively increase the movement stroke of the recliner in the unlocking and locking processes, so that the movement trajectories of multiple tooth plates can be adjusted and normalized within this movement stroke, thereby ensuring the synchronization of the movement of multiple tooth plates, so that the recliner can always be unlocked or locked correctly, thereby improving the reliability of the use of the recliner. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is one of the three-dimensional structural diagrams of the angle adjuster.

[0015] Figure 2 This is the second schematic diagram of the three-dimensional structure of the angle adjuster.

[0016] Figure 3 This is a schematic diagram of the structure of the angle adjuster when viewed from above with a portion of the housing removed.

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the angle adjuster with a portion of the shell removed.

[0018] Figure 5 This is an exploded view of the angle adjuster.

[0019] Figure 6 It is a structural diagram of the cam of this angle adjuster.

[0020] Figure 7 It is a structural diagram of the tooth plate of the angle adjuster.

[0021] In the figure, 1, housing; 1a, internal teeth; 1b, limit block; 1c, boss; 2, drive shaft; 2a, annular protrusion; 3, cam; 3a, pawl; 3a1, unlocking protrusion; 3a2, locking protrusion; 4, tooth plate; 4a, groove; 4b, first avoidance section; 4c, unlocking section; 4d, locking section; 4e, second avoidance section; 4f, first transition section; 4g, second transition section; 5, coil spring; 6, bushing; 6a, first annular step; 6b, second annular step. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] A recliner, referring to Figure 1-7 , including a housing 1 and a drive shaft 2 rotatably inserted into the housing 1, an inner tooth 1a is provided on the inner side wall of the housing 1, a cam 3 is provided on the drive shaft 2, and the side wall of the cam 3 has a plurality of pawls 3a arranged along the circumferential direction, and a plurality of tooth plates 4 corresponding to the pawls 3a and capable of meshing with the inner teeth 1a of the housing 1 are arranged circumferentially in the housing 1, a coil spring 5 for rotating and resetting the drive shaft 2 is provided between the housing 1 and the drive shaft 2, and the tooth plate 4 has a groove 4a for the pawl 3a to be embedded in. The groove 4a is close to the side wall of the drive shaft 2 and includes a first avoidance section 4b and an unlocking section 4c from the groove opening to the bottom of the groove. The groove 4a is away from the side of the drive shaft 2. The wall includes a locking section 4d and a second avoidance section 4e from the groove mouth to the bottom of the groove in sequence. The inner and outer walls of the protruding claw 3a are respectively provided with an unlocking protrusion 3a1 and a locking protrusion 3a2. When the locking protrusion 3a2 is located in the locking section 4d, the locking protrusion 3a2 and the side wall of the groove 4a away from the drive shaft 2 are always in a contact state, and the unlocking protrusion 3a1 and the side wall of the groove 4a close to the drive shaft 2 are always in a separated state; when the unlocking protrusion 3a1 is located in the unlocking section 4c, the unlocking protrusion 3a1 and the side wall of the groove 4a close to the drive shaft 2 are always in a contact state, and the locking protrusion 3a2 and the side wall of the groove 4a away from the drive shaft 2 are always in a separated state.

[0024] Specifically, refer to Figure 3 、 Figure 6 and Figure 7The distance between the unlocking section 4c and the drive shaft 2 is greater than the distance between the first avoidance section 4b and the drive shaft 2, and a first transition section 4f connecting the two is further provided between the first avoidance section 4b and the unlocking section 4c. The distance between the locking section 4d and the drive shaft 2 is less than the distance between the second avoidance section 4e and the drive shaft 2, and a second transition section 4g connecting the two is further provided between the locking section 4d and the second avoidance section 4e; more specifically, the housing 1 has a plurality of limit blocks 1b arranged at intervals along the circumferential direction, each tooth plate 4 is located between two adjacent limit blocks 1b, and the bottoms of the plurality of protruding claws 3a are connected to the cam 3 as a whole.

[0025] Further, refer to Figure 2 and Figure 5 A bushing 6 is disposed between the drive shaft 2 and the cam 3. The outer wall of the drive shaft 2 has an annular protrusion 2a. The outer wall of the bushing 6 has a first annular step 6a and a second annular step 6b connected in sequence along the axial direction. The end of the bushing 6 adjacent to the second annular step 6b abuts against the annular protrusion 2a. The first annular step 6a abuts against the cam 3. The coil spring 5 is sleeved between the second annular step 6b and the cam 3. The housing 1 has a boss 1c. One end of the coil spring 5 is fixed to the bushing 6, and the other end is fixed to the boss 1c.

[0026] In this embodiment, the drive shaft 2 and the cam 3 are preferably made of metal material, and the bushing 6 is made of plastic material.

[0027] The following describes the working principle of this angle adjuster:

[0028] The present recliner is provided with a groove 4a on the tooth plate 4 for the pawl 3a to be embedded in, and then a first avoidance section 4b, a first transition section 4f and an unlocking section 4c are provided in sequence on the inner wall of the groove 4a from the groove opening to the groove bottom, and a locking section 4d, a second transition section 4g and a second avoidance section 4e are provided in sequence on the outer wall of the groove 4a from the groove opening to the groove bottom, and an unlocking protrusion 3a1 and a locking protrusion 3a2 are provided on the inner and outer walls of the pawl 3a respectively. When the recliner is working, the first avoidance section 4b and the second avoidance section 4e play a role of giving way, and the provision of the first transition section 4f and the second transition section 4g makes the transition switching between the unlocking stroke and the locking stroke of the recliner smoother, and the provision of the unlocking section 4c and the locking section 4d can respectively increase the movement stroke of the unlocking and locking processes of the recliner, so that in this movement stroke The movement trajectories of multiple tooth plates 4 can be adjusted and normalized. Specifically, when one of the tooth plates 4 reaches the predetermined movement trajectory, for example, the tooth plate 4 has been engaged with the inner teeth 1a of the housing 1, the pawl 3a corresponding to the tooth plate 4 can no longer further push the tooth plate 4 to move in the direction of engagement with the inner teeth 1a of the housing 1, and can only maintain the current engagement state. If the other tooth plates 4 have not yet engaged with the inner teeth 1a of the housing 1, the corresponding pawl 3a can continue to push them in the direction of engagement with the inner teeth 1a of the housing 1 until all the tooth plates 4 are engaged with the inner teeth 1a of the housing 1. The principle of disengagement of the tooth plate 4 from the inner teeth 1a of the housing 1 is consistent with the above process, thereby ensuring the synchronization of the movement of multiple tooth plates 4, so that the recliner can always be correctly unlocked or locked, thereby improving the reliability of the recliner.

[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A recliner, comprising a housing (1) and a drive shaft (2) rotatably plugged into the housing (1), wherein the inner side wall of the housing (1) is provided with internal teeth (1a), the drive shaft (2) is provided with a cam (3), the side wall of the cam (3) has a plurality of circumferentially arranged protruding claws (3a), and the housing (1) is provided with a plurality of tooth plates (4) arranged in a one-to-one correspondence with the protruding claws (3a), characterized in that: A coil spring (5) is provided between the housing (1) and the drive shaft (2) for maintaining engagement between the tooth plate (4) and the inner teeth (1a) of the housing (1); the tooth plate (4) has a groove (4a) for the pawl (3a) to be embedded in; the side wall of the groove (4a) close to the drive shaft (2) includes a first avoidance section (4b) and an unlocking section (4c) in sequence from the groove opening to the groove bottom; the side wall of the groove (4a) away from the drive shaft (2) includes a locking section (4d) and a second avoidance section (4e) in sequence from the groove opening to the groove bottom; the inner side wall and outer side wall of the pawl (3a) respectively have an unlocking convex portion (3a1) and a The locking protrusion (3a2) is located in the locking section (4d), the locking protrusion (3a2) and the side wall of the groove (4a) away from the drive shaft (2) are always in a contact state, and the unlocking protrusion (3a1) and the side wall of the groove (4a) close to the drive shaft (2) are always in a separated state; when the unlocking protrusion (3a1) is located in the unlocking section (4c), the unlocking protrusion (3a1) and the side wall of the groove (4a) close to the drive shaft (2) are always in a contact state, and the locking protrusion (3a2) and the side wall of the groove (4a) away from the drive shaft (2) are always in a separated state.

2. A recliner according to claim 1, characterized in that: The distance between the unlocking section (4c) and the drive shaft (2) is greater than the distance between the first clearance section (4b) and the drive shaft (2); a first transition section (4f) connecting the first clearance section (4b) and the unlocking section (4c) is further provided; the distance between the locking section (4d) and the drive shaft (2) is less than the distance between the second clearance section (4e) and the drive shaft (2); a second transition section (4g) connecting the locking section (4d) and the second clearance section (4e) is further provided.

3. The angle adjuster according to claim 1, characterized in that: The housing (1) has a plurality of limit blocks (1b) arranged at intervals along the circumferential direction, each tooth plate (4) is located between two adjacent limit blocks (1b), and the bottoms of the plurality of protruding claws (3a) and the cam (3) are connected as a whole.

4. A recliner according to claim 1, 2 or 3, characterized in that: A bushing (6) is provided between the drive shaft (2) and the cam (3); the outer wall of the drive shaft (2) has an annular protrusion (2a); the outer wall of the bushing (6) has a first annular step portion (6a) and a second annular step portion (6b) connected in sequence along the axial direction; the end of the bushing (6) close to the second annular step portion (6b) abuts against the annular protrusion (2a); the first annular step portion (6a) abuts against the cam (3); and the coil spring (5) is sleeved between the second annular step portion (6b) and the cam (3).

5. The angle adjuster according to claim 4, characterized in that: The housing (1) has a boss (1c), one end of the coil spring (5) is fixed on the bushing (6), and the other end is fixed on the boss (1c).

6. The angle adjuster according to claim 4, characterized in that: The drive shaft (2) and the cam (3) are made of metal material, and the bushing (6) is made of plastic material.

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