Electrically driven backrest lock

Abstract

The utility model discloses an electric drive backrest lock, including lock body, drive component, stop hook and lock leaf, stop hook is used for with lock leaf abutment or break away, to lock the backrest or unlock, drive component includes driver, movable element and unlocking steel wire, the output of driver is connected with movable element, is used for driving movable element linear reciprocating displacement movement along the axial direction of driver output, one end of unlocking steel wire is connected with movable element, and the other end is transmission cooperation with stop hook, when driver drive movable element displacement, movable element drives unlocking steel wire to pull stop hook, makes stop hook with lock leaf break away to complete unlocking, through the transmission configuration of driver axial straight push movable element, movable element directly pulls the transmission of unlocking steel wire, eliminates the stroke deviation that winding radius fluctuation, steel wire relaxation brought in traditional rope formula structure, eliminates the rope fluctuation, makes unlocking stroke stable, avoids the jam, does not reach the position.

Description

Technical Field

[0001] This utility model relates to a lock, specifically an electrically driven backrest lock. Background Technology

[0002] The electric backrest lock in a car is a core component for locking and unlocking the seat back. Most existing electric backrest locks use a rope-driven mechanism, where a motor winds up the unlocking wire, causing the stop hook to swing relative to the lock leaf to unlock. However, this method suffers from large fluctuations in the winding radius, easy deformation and loosening of the unlocking wire, and significant transmission clearance redundancy, resulting in poor consistency in the unlocking stroke. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an electrically driven backrest lock to achieve a stable and consistent unlocking stroke.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electrically driven backrest lock, comprising a lock body, a drive component, a stop hook, and a lock leaf, wherein the stop hook is used to engage or disengage with the lock leaf to lock or unlock the backrest.

[0005] The driving component includes a driver, a moving part, and an unlocking wire;

[0006] The output end of the driver is connected to the movable part, and is used to drive the movable part to move linearly back and forth along the axial direction of the driver output end;

[0007] One end of the unlocking wire is connected to the movable part, and the other end is engaged with the stop hook in a transmission manner;

[0008] When the driver drives the movable part to move, the movable part drives the unlocking wire to pull the stop hook, causing the stop hook to disengage from the lock leaf to complete the unlocking.

[0009] As a further improvement of this utility model, the movable part includes a connector and a connector head. The connector is installed on the output end of the driver, and the connector head is installed on the connector. One end of the unlocking wire is connected to the connector head. The driver drives the connector to move linearly back and forth along the axial direction. The connector drives the unlocking wire to move through the connector head.

[0010] As a further improvement of this utility model, the connector and the connector head are detachably connected.

[0011] As a further improvement of this utility model, the connector and the connector head are snap-fitted together.

[0012] As a further improvement of this utility model, the micro switch is set on the path of the linear displacement of the moving part, so that the moving part triggers the micro switch during its linear displacement movement.

[0013] As a further improvement of this utility model, the micro switch is provided with a trigger spring, which extends to the linear displacement path of the movable member, so that the movable member presses the trigger spring to trigger the micro switch when it is displaced.

[0014] As a further improvement of this utility model, the extension direction of the trigger spring forms an acute angle with the axial direction of the movable member.

[0015] As a further improvement of this utility model, the unlocking wire is arranged along the inner wall of the lock body;

[0016] The inner wall of the lock body is provided with an arc-shaped bend, and a limiting sleeve is provided at the arc-shaped bend; the limiting sleeve has a through hole for the unlocking wire to pass through, the through hole is adapted to the unlocking wire, the unlocking wire passes through the through hole and is slidably connected in the limiting sleeve, so as to constrain the unlocking wire on the arc-shaped bend.

[0017] As a further improvement of this utility model, the guide channel of the limiting sleeve extends along the direction of the arc bend, and is used to guide the unlocking wire to move along the preset arc path. The beneficial effect of this utility model is that, through the transmission configuration of the driver axially pushing the movable part and the movable part directly pulling the unlocking wire, the stroke deviation caused by the fluctuation of the winding radius and the slack of the wire in the traditional rope winding structure is eliminated, the rope winding fluctuation is eliminated, the unlocking stroke is stabilized, and jamming and incomplete unlocking are avoided. Attached Figure Description

[0018] Figure 1 This is a front view of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the limiting sleeve in an embodiment of the present utility model.

[0020] Reference numerals: 1. Lock body; 2. Driver; 3. Moving part; 4. Micro switch; 5. Unlocking wire; 6. Stop hook; 7. Lock leaf; 8. Trigger spring; 9. Arc bend; 10. Limit sleeve; 11. Through hole; 12. Connector; 13. Connector. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0022] Referring to Figures 1-2, an electrically driven backrest lock includes a lock body 1, a driving component, a stop hook 6, and a lock leaf 7. The stop hook 6 is used to abut or disengage from the lock leaf 7 to lock or unlock the backrest. The driving component includes a driver 2, a movable part 3, and an unlocking wire 5. The output end of the driver 2 is connected to the movable part 3 and is used to drive the movable part 3 to move linearly back and forth along the axial direction of the output end of the driver 2. One end of the unlocking wire 5 is connected to the movable part 3, and the other end is in transmission engagement with the stop hook 6. When the driver 2 drives the movable part 3 to move, the movable part 3 drives the unlocking wire 5 to pull the stop hook 6, causing the stop hook 6 to disengage from the lock leaf 7 to complete the unlocking.

[0023] In this embodiment, the transmission configuration of the driver 2 axially pushing the movable part 3 and the movable part 3 directly pulling the unlocking wire 5 eliminates the stroke deviation caused by the fluctuation of the winding radius and the slack of the wire in the traditional rope winding structure; the linear displacement of the movable part 3 is fixed, and the unlocking stroke is consistent; in this embodiment, the driver 2 can be a lead screw motor, which drives the lead screw to rotate, and the nut on the lead screw converts the rotational motion into linear motion. The nut is connected to the movable part 3, or the movable part 3 is set as a nut structure and drives it to move linearly back and forth; the driver can also be an electric push rod, with the output shaft connected to the movable part 3, to drive the movable part 3 to move axially.

[0024] Preferably, the movable part 3 includes a connector 13 and a connector 12. The connector 13 is installed at the output end of the driver 2, and the connector 12 is installed on the connector 13. One end of the unlocking wire 5 is connected to the connector 12. The driver 2 drives the connector 13 to move linearly back and forth along the axial direction. The connector 13 drives the unlocking wire 5 to move through the connector 12.

[0025] In this embodiment, by setting the movable part 3 as a separate connector 13 and connector 12, the connector 13 receives the driving force of the driver 2 and moves linearly back to the reset position, and the connector 12 transmits the force to the unlocking wire 5. The connector 12, as an independent connection interface, can adapt to the end fixing requirements of the unlocking wire 5, making the connection point structure more compact and the force transmission more direct, which is conducive to improving the initial response sensitivity of the unlocking action and the accuracy of displacement transmission.

[0026] Furthermore, the connector 13 is detachably connected to the connector 12.

[0027] In this embodiment, the connector 13 and the connector 12 are detachably connected. When the unlocking wire 5 or the connector 12 wears or becomes fatigued after long-term use, the connector 12 can be removed from the connector 13 for independent replacement without disassembling the connector 13 or the driver 2, making maintenance convenient.

[0028] Preferably, the connector 13 and the connector 12 are snap-fitted together.

[0029] In this embodiment, the connector 13 and the connector 12 are detachably connected by a snap-fit ​​mechanism. The connector 13 is provided with a snap-fit ​​groove or a snap-fit ​​protrusion, and the connector 12 is provided with a corresponding snap-fit ​​protrusion or a snap-fit ​​groove. The two are assembled by elastic snap-fit. The snap-fit ​​structure requires no additional fasteners, and the disassembly and assembly operations are simple and quick, making it particularly suitable for use in the confined internal space of the lock body 1.

[0030] Preferably, the micro switch 4 is positioned on the path of the linear displacement of the movable member 3, so that the movable member 3 triggers the micro switch 4 during its linear displacement movement.

[0031] In this embodiment, the micro switch 4 is directly set on the linear displacement path of the movable part 3. When the movable part 3 performs the unlocking action, it is directly triggered. It detects the displacement position of the movable part 3 itself, rather than the swing position of the stop hook 6 or the locking leaf 7, thus avoiding false triggering or trigger failure caused by component gaps or wear. The unlocking position signal is accurate and reliable.

[0032] Preferably, the micro switch 4 is provided with a trigger spring 8, which extends to the linear displacement path of the movable member 3, so that the movable member 3 presses the trigger spring 8 to trigger the micro switch 4 when it is displaced.

[0033] In this embodiment, the trigger spring 8 has its own elastic buffering capability to prevent the moving part 3 from rigidly contacting the micro switch 4 and damaging the internal contacts; at the same time, under the vibration environment of vehicle driving, the elastic deformation of the spring can maintain stable contact with the moving part 3, avoiding the signal from being interrupted or jittering due to bumps and inertial impacts, so that the signal triggering is reliable and has a long service life.

[0034] Furthermore, the extension direction of the trigger spring 8 forms an acute angle with the axial direction of the movable member 3.

[0035] In this embodiment, the movable part 3 can slide smoothly into the trigger spring 8 along the acute angle direction during linear displacement, increasing the contact area, making the triggering process smoother, reducing wear, and improving triggering reliability and service life.

[0036] Preferably, the unlocking wire 5 is arranged along the inner wall of the lock body 1; the inner wall of the lock body 1 is provided with an arc-shaped bend 9, and a limiting sleeve 10 is provided at the arc-shaped bend 9; the limiting sleeve 10 has a through hole 11 for the unlocking wire 5 to pass through, the through hole 11 is adapted to the unlocking wire 5, the unlocking wire 5 passes through the through hole 11 and is slidably connected in the limiting sleeve 10, so as to constrain the unlocking wire 5 on the arc-shaped bend 9.

[0037] In this embodiment, the unlocking wire 5 is arranged along the inner wall of the lock body 1, with a compact overall routing that does not occupy additional space inside the lock body 1. At the arc-shaped bend 9, the wire, due to its insufficient rigidity, tends to warp outwards. The limiting sleeve 10 constrains the wire to a preset arc-shaped path at this point, preventing the wire from springing up from the bend, arching, or radially shifting when unlocking is applied. The wire can slide axially within the through hole 11 of the limiting sleeve 10 without affecting the normal displacement of the unlocking wire 5. This structure ensures the stability of the wire's routing during repeated unlocking actions, guaranteeing smooth displacement transmission and consistent stroke in each unlocking action.

[0038] Furthermore, the guide channel of the limiting sleeve 10 extends along the direction of the arc bend 9 to guide the unlocking wire 5 to move along the preset arc path.

[0039] In this embodiment, the guide channel of the limiting sleeve 10 extends along the direction of the arc bend 9, providing continuous guidance for the unlocking wire 5 along the preset arc path; when the unlocking wire 5 slides in the guide channel, its movement trajectory is consistent with the direction of the arc bend 9 of the housing, which improves the transmission efficiency and stroke transmission accuracy.

[0040] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An electrically driven backrest lock, comprising a lock body, a drive component, a stop hook, and a lock leaf, wherein the stop hook is used to abut or disengage from the lock leaf to lock or unlock the backrest, characterized in that: The driving component includes a driver, a moving part, and an unlocking wire; The output end of the driver is connected to the movable part, and is used to drive the movable part to move linearly back and forth along the axial direction of the driver output end; One end of the unlocking wire is connected to the movable part, and the other end is engaged with the stop hook in a transmission manner; When the driver drives the movable part to move, the movable part drives the unlocking wire to pull the stop hook, causing the stop hook to disengage from the lock leaf to complete the unlocking.

2. The electrically driven backrest lock according to claim 1, characterized in that, The movable component includes a connector and a connector head. The connector is installed at the output end of the driver, and the connector head is installed on the connector. One end of the unlocking wire is connected to the connector head. The driver drives the connector to move linearly back and forth along the axial direction. The connector drives the unlocking wire to move through the connector head.

3. The electrically driven backrest lock according to claim 2, characterized in that, The connector and the connector head are detachably connected.

4. The electrically driven backrest lock according to claim 3, characterized in that, The connector and the connector head are snapped together.

5. The electrically driven backrest lock according to claim 1, characterized in that, The driving component also includes a micro switch, which is disposed on the path of the linear displacement of the moving part, so that the moving part triggers the micro switch during its linear displacement movement.

6. The electrically driven backrest lock according to claim 5, characterized in that, The micro switch is provided with a trigger spring, which extends to the linear displacement path of the movable member, so that the movable member presses the trigger spring to trigger the micro switch when it is displaced.

7. The electrically driven backrest lock according to claim 6, characterized in that, The extension direction of the trigger spring forms an acute angle with the axial direction of the movable member.

8. The electrically driven backrest lock according to claim 1, characterized in that, The unlocking wire is arranged along the inner wall of the lock body; the inner wall of the lock body is provided with an arc-shaped bend, and a limiting sleeve is provided at the arc-shaped bend; the limiting sleeve has a through hole for the unlocking wire to pass through, the through hole is adapted to the unlocking wire, the unlocking wire passes through the through hole and is slidably connected in the limiting sleeve, so as to constrain the unlocking wire on the arc-shaped bend.

9. The electrically driven backrest lock according to claim 8, characterized in that, The guide channel of the limiting sleeve extends along the direction of the arc bend, and is used to guide the unlocking wire to move along the preset arc path.

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