Locking device for seat turntable

Abstract

The utility model discloses a locking device for a seat turntable, which comprises a fixed disc and a movable disc in running fit with the fixed disc, a gear ring is fixedly mounted on the fixed disc, and the gear ring is provided with an annular tooth part; a locking block and a transmission assembly controlling the locking block to slide are installed on the movable disc in a sliding mode, and locking teeth matched with the annular tooth part are arranged on the side portion of the locking block. The transmission assembly controls the locking block to slide, and the locking teeth can be switched between meshing and separation of the locking teeth and the annular tooth part. The stepless locking device has the advantages that stepless locking is achieved, noise or shaking is avoided, the locking effect is good, and use is flexible.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, specifically to a locking device for a seat turntable. Background Technology

[0002] With the continuous upgrading of automobiles, the automotive industry is developing towards intelligent and electric trends, and the market's requirements for seats are also getting higher and higher. They not only need to meet passengers' requirements for seat comfort, but also meet passengers' requirements for seat functionality, including the demand for rotating seats. Rotating seats can meet the various communication modes needed by customers, providing convenience and comfort for various scenarios such as business negotiations, family trips, and gatherings with friends.

[0003] The swivel seat has a turntable at the bottom. By rotating the entire seat via the turntable, the seat can be adjusted to different orientations. Once the seat is rotated to the desired angle, a locking mechanism is often added to the turntable to ensure its stability and keep it firmly in the stop position, thus improving both comfort and safety.

[0004] In existing technologies, there are usually two types of locking mechanisms. One type is to lock by inserting an integral claw-shaped or tooth-shaped component into the corresponding key hole. There is a gap between the contour of the claw-shaped or tooth-shaped component and the contour of the key hole, which can easily cause noise and shaking during driving. The other type is to lock by inserting a pin into the key hole between the fixed plate and the rotating plate. Neither of these two locking methods can achieve stepless adjustment. Generally, the locking mechanism only exists at the designed position and the 180-degree position, which limits the application scenarios and reduces flexibility. Utility Model Content

[0005] In view of this, the present invention provides a locking device for a seat turntable, the purpose of which is to achieve stepless locking of the rotating seat and solve the noise and shaking problems existing after the existing rotating seats are locked.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A locking device for a seat turntable includes a fixed plate and a movable plate that rotates with the fixed plate. A toothed ring is fixedly mounted on the fixed plate, and the toothed ring has an annular toothed portion. A locking block and a transmission assembly for controlling the sliding of the locking block are slidably mounted on the movable plate. The side of the locking block is provided with locking teeth that are adapted to the annular toothed portion. By controlling the sliding of the locking block through the transmission assembly, the locking teeth can switch between engaging and disengaging with the annular toothed portion.

[0008] The above structure controls the engagement and disengagement of the sliding locking block and the ring tooth through the transmission component, so that the seat can be stably locked at any position. The structure is simple, flexible in use, and can achieve stepless adjustment.

[0009] Preferably, the transmission assembly includes a drive component slidably mounted on a moving plate. The drive component has a slotted hole, and the locking block has a guide post slidably fitted within the slotted hole. The length direction of the slotted hole forms an angle with the sliding direction of the locking block. By controlling the reciprocating sliding of the drive component, the locking block can be forced to reciprocate under the guiding action of the slotted hole and the guide post. With the above structure, the reciprocating sliding of the locking block is controlled by the drive component, and the engagement and disengagement of the locking teeth and the annular teeth can be adjusted by adjusting the length or angle of the slotted hole. The structure is compact and flexible.

[0010] Preferably, the transmission assembly further includes a return spring and a zipper. The return spring is installed between the drive component and the moving plate, and the zipper is connected to the end of the drive component away from the return spring. With the above structure, the zipper drives the drive component to separate the locking teeth from the annular teeth. After adjusting to the ideal position, the return spring can reset the lock teeth and ensure effective locking between the locking teeth and the annular teeth.

[0011] Preferably, the distal end of the zipper is connected to an electric drive device. With this structure, the locking mechanism can be controlled electrically or manually.

[0012] Preferably, a base plate is fixed on the moving plate, and the base plate has a first sliding groove and a second sliding groove that are vertically arranged and connected. The locking block is slidably installed in the first sliding groove, and a positioning slider is slidably installed in the second sliding groove on the lower side of the driving component. The end of the locking block away from the locking teeth has a first positioning inclined surface, and the side of the positioning slider has a second positioning inclined surface that is adapted to the first positioning inclined surface. With the above structure, the first positioning inclined surface and the second positioning inclined surface adaptably abut against each other. The self-locking angle is determined according to the materials of the positioning slider and the locking block, so that the inclination angle of the second positioning inclined surface is less than or equal to the self-locking angle. The positioning slider and the locking block can achieve self-locking, ensuring a stable locking effect.

[0013] Preferably, the tooth width of the annular tooth is 0.5-1.5mm, and the tooth groove width is 0.6-1.8mm. With the above structure, the tooth shape is finer, the gap between the locking teeth and the annular tooth is small, the locking effect is good, and the seat is stable and noiseless.

[0014] Preferably, the gear ring is an internal gear ring, and two sets of the locking blocks and transmission components are symmetrically mounted on the moving disc. This structure provides more stable locking.

[0015] Preferably, the two sets of transmission components are arranged symmetrically about the center of the moving disc. This structure achieves a better locking effect.

[0016] Preferably, a geared disc is fixed on the moving disc, and a drive motor is fixed on the fixed disc. The output shaft of the drive motor is connected to a gear that meshes with the geared disc. With this structure, the rotating seat can be electrically adjusted.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The locking and unlocking of the rotating seat is achieved by the engagement and disengagement of the locking teeth and the ring teeth. The ring teeth are fine teeth, and the seat can be kept stopped at any position, realizing stepless adjustment.

[0019] 2. The toothed block and the positioning slider are connected by an inclined surface. When locked, the return spring pulls the drive component, which makes the locking teeth and the ring teeth mesh more tightly, with a small gap, avoiding noise and shaking.

[0020] 3. The locking block can slide under the guidance of the strip hole and the guide post. The drive plate can cover the positioning slider and the locking block in the vertical direction. The first positioning slope and the second positioning slope are always in contact, which can balance the force on the locking block and make the locking mechanism more stable.

[0021] 4. The seat can be rotated and locked manually or electrically, which can meet various needs and is highly flexible. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 A schematic diagram illustrating the connection of drive component 3;

[0024] Figure 3 A schematic diagram illustrating the first slide 6a and the second slide 6b;

[0025] Figure 4 This is a partial cross-sectional view of the present invention;

[0026] Figure 5 To illustrate the structural diagram of transmission component C;

[0027] Figure 6 This is a schematic diagram showing the meshing of the gear 7 and the gear 9. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0029] like Figure 1As shown, a locking device for a seat turntable includes a fixed plate A and a movable plate B that rotatably engages with the fixed plate A. When applied to an automobile seat, the fixed plate A is mounted on a base slide rail, and the movable plate B is connected to the bottom of the automobile seat. A toothed ring 1 with an annular toothed portion 1a is fixedly mounted on the fixed plate A. A locking block 2 is mounted on the movable plate B. The side of the locking block 2 has locking teeth 2a that are adapted to the annular toothed portion 1a. The locking block 2 can slide relative to the movable plate B. By controlling the movement of the locking block 2 through a transmission component C set on the movable plate B, the engagement and disengagement of the locking teeth 2a and the annular toothed portion 1a can be achieved, i.e., locking and unlocking of the rotating seat. The tooth parameters of the annular toothed portion 1a are: tooth width 0.5-1.5mm, optimal 0.75mm; tooth groove width 0.6-1.8mm, optimal 0.82mm. Under these tooth parameters, fine tooth engagement can be formed, the fit clearance is small, there is no noise or shaking, and the rotating seat can be held in any position, achieving stepless locking.

[0030] like Figure 2 and Figure 3 As shown, a base plate 6 is fixed on the moving plate B. The base plate 6 has a first sliding groove 6a along the radial direction of the moving plate B, and a second sliding groove 6b perpendicular to the first sliding groove 6a. The middle part of the second sliding groove 6b communicates with the first sliding groove 6a. The locking block 2 is slidably installed in the first sliding groove 6a. The transmission assembly C includes a drive component 3, a positioning slider 3c, a return spring 4, and a pull lock 5. The drive component 3 includes a horizontal drive plate 31 and two mounting plates 32 perpendicular to the drive plate 31 on both sides along the length direction. The two mounting plates 32 are used to connect the return spring 4 and the pull lock 5, respectively. The drive plate 31 has a strip hole 3a. The length direction of the strip hole 3a forms an angle with the sliding direction of the locking block 2. The locking block 2 has a guide post 2c that is slidably sleeved in the strip hole 3a. The positioning slider 3c is fixedly connected to the lower side of the drive component 3 and slidably installed in the second sliding groove 6b. The locking block 2 has a first positioning slope 2b at the end away from the locking tooth 2a, and the side of the positioning slider 3c is provided with a second positioning slope 3c1 that is adapted to the first positioning slope 2b. The second positioning slope 3c1 is parallel to the strip hole 3a.

[0031] like Figure 2 and Figure 5As shown, in this embodiment, when the locking mechanism is locked, the return spring 4 pulls the drive component 3 by its tension, causing the positioning slider 3c, which is fixed to the drive component 3, to abut against the locking block 2. The positioning slider 3c and the locking block 2 abut against each other via an inclined surface. The positioning slider 3c provides support force to the locking block 2, and this support force forms an acute angle with the sliding direction of the locking block 2. This allows the locking teeth 2a to mesh more tightly with the annular teeth 1a, eliminating free gaps and resulting in a good locking effect. Furthermore, the self-locking angle is determined based on the materials of the positioning slider 3c and the locking block 2, ensuring that the inclination angle 3c1 of the second positioning inclined surface is less than or equal to the self-locking angle. This enables the positioning slider 3c and the locking block 2 to achieve self-locking, guaranteeing a stable locking effect. The distal end of the zipper 5 is connected to an electric drive device or a manual advance mechanism. By manually or electrically pulling the drive component 3, the drive component 3 and the positioning slider 3c can slide along the second slide groove 6b in a direction away from the return spring 4. Under the guidance of the strip hole 3a and the guide post 2c, the locking block 2 can slide along the first slide groove 6a in a direction away from the annular tooth 1a, thus unlocking. Of course, if the drive component 3 moves in the opposite direction, it can also push the locking block 2 towards the annular tooth 1a under the guidance of the strip hole 3a and the guide post 2c, thus locking. During this process, the drive plate 31 can cover the positioning slider 3c and the locking block 2 in the vertical direction, and the first positioning inclined surface 2b and the second positioning inclined surface 3c1 are always in contact, which can balance the force on the locking block 2 and make the locking mechanism more stable.

[0032] like Figure 1 As shown, the gear ring 1 can be an internal gear ring or an external gear ring, and the corresponding locking block 2 can be installed on the inner or outer side of the gear ring 1 to achieve locking. In this embodiment, the gear ring 1 is an internal gear ring, and two sets of locking blocks 2 and transmission components C are symmetrically installed on the moving disk B. The two sets of transmission components C are centrally symmetrical about the center of the moving disk B, that is, the return spring 4 pulls the drive component 3 in opposite directions, and the force is balanced, which can better lock and avoid shaking.

[0033] like Figure 6 As shown, a geared disc 7 is fixed in the middle of the moving disc B, and a drive motor 8 is fixed on the fixed disc A. The output shaft of the drive motor 8 is connected to a gear 9 that meshes with the geared disc 7. By driving the gear 9 to rotate through the drive motor 8, the moving disc B can be rotated, thereby realizing the seat rotation control.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A locking device for a seat turntable, comprising a fixed plate (A) and a movable plate (B) rotatably engaged with said fixed plate (A), characterized in that: A toothed ring (1) is fixedly installed on the fixed plate (A), and the toothed ring (1) has an annular toothed portion (1a); A locking block (2) and a transmission assembly (C) for controlling the sliding of the locking block (2) are slidably mounted on the moving plate (B). The side of the locking block (2) is provided with locking teeth (2a) that are adapted to the annular toothed part (1a). By controlling the sliding of the locking block (2) through the transmission assembly (C), the locking teeth (2a) can switch between engaging and disengaging with the annular teeth (1a).

2. The locking device for a seat turntable according to claim 1, characterized in that: The transmission assembly (C) includes a drive component (3) slidably mounted on the moving plate (B). The drive component (3) has a strip hole (3a). The locking block (2) has a guide post (2c) slidably fitted inside the strip hole (3a). The length direction of the strip hole (3a) and the sliding direction of the locking block (2) are at an angle. By controlling the drive component (3) to slide back and forth, the locking block (2) can be forced to slide back and forth under the guiding action of the strip hole (3a) and the guide post (2c).

3. The locking device for a seat turntable according to claim 2, characterized in that: The transmission assembly (C) also includes a return spring (4) and a zipper (5). The return spring (4) is installed between the drive component (3) and the moving plate (B). The zipper (5) is connected to the end of the drive component (3) away from the return spring (4).

4. The locking device for a seat turntable according to claim 3, characterized in that: The zipper (5) is connected to an electric drive device at its far end.

5. The locking device for a seat turntable according to claim 2, characterized in that: A base plate (6) is fixed on the moving plate (B). The base plate (6) has a first slide groove (6a) and a second slide groove (6b) that are vertically arranged and connected. The locking block (2) is slidably installed in the first slide groove (6a). The driving component (3) has a positioning slider (3c) slidably installed in the second slide groove (6b) on its lower side. The locking block (2) has a first positioning inclined surface (2b) at one end away from the locking tooth (2a). The positioning slider (3c) has a second positioning inclined surface (3c1) on its side that is adapted to the first positioning inclined surface (2b).

6. The locking device for a seat turntable according to claim 1, characterized in that: The tooth width of the annular tooth section (1a) is 0.5-1.5 mm, and the tooth groove width is 0.6-1.8 mm.

7. The locking device for a seat turntable according to claim 1, characterized in that: The gear ring (1) is an internal gear ring, and two sets of the locking blocks (2) and the transmission assembly (C) are symmetrically installed on the moving disc (B).

8. The locking device for a seat turntable according to claim 7, characterized in that: The two sets of transmission components (C) are arranged symmetrically about the center of the moving disk (B).

9. The locking device for a seat turntable according to claim 1, characterized in that: A gear disk (7) is fixed on the moving disk (B), and a drive motor (8) is fixed on the fixed disk (A). The output shaft of the drive motor (8) is connected to a gear (9) that meshes with the gear disk (7).

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