A pull rod assembly for a self-sucking door lock

Abstract

The application relates to a pull rod assembly for a self-suction door lock, belonging to the self-suction door lock field, which comprises a casing for mounting parts; a big lock tongue which is rotationally connected to the casing, the big lock tongue is provided with a lock groove for locking a door lock post and a limiting surface for locking the big lock tongue, and the big lock tongue can lock the door lock post; a push rod body for pushing the big lock tongue to rotate away from the vehicle body; a small lock tongue which can lock the rotation of the big lock tongue when rotating to the position of the lock groove or the limiting surface; a lock opening pull rod which is rotationally connected to the casing and can rotate coaxially with the small lock tongue; and a clutch part provided with a clutch part, when the small lock tongue locks the rotation of the big lock tongue, the clutch part abuts against the lock opening pull rod, when the clutch part abuts against the lock opening pull rod, rotating the lock opening pull rod can drive the clutch part and the small lock tongue to rotate away from the big lock tongue. The application can realize the clutch function of the lock opening pull rod and the small lock tongue.

Description

Technical Field

[0001] This application relates to the field of self-closing door locks, and more particularly to a lever assembly for self-closing door locks. Background Technology

[0002] Car doors require the driver and passengers to pull or push them to close. If insufficient force is used, the door will remain partially locked. To address this issue and improve the door-closing experience, more and more cars are equipped with self-closing door locks. When the door and lock are partially locked, the self-closing door lock works in conjunction with the door lock cylinder to fully close the door.

[0003] A self-closing door lock mainly consists of a large latch that engages with the door lock cylinder, a push rod assembly that drives the large latch to rotate, a small latch that senses the state of the large latch and locks it, and an unlocking lever connected to the small latch. The unlocking lever connects to the handles inside and outside the door and is used for manual door opening. When opening the door, the unlocking lever drives the small latch to rotate, releasing the small latch from the large latch and disconnecting the linkage between the push rod assembly and the large latch, allowing the large latch to rotate freely.

[0004] Regarding the aforementioned technologies, during the use of self-closing door locks, the large latch, small latch, and door have multiple states, commonly including open, half-locked, and fully locked. The relative rotation of the small and large latches switches between these states. During this process, the unlocking lever connected to the small latch also swings, causing the door handles inside and outside the vehicle to move even when no one is operating them. This affects the user experience for drivers and passengers and can easily lead to misunderstandings about the security of self-closing door locks. While the small latch should not move during closing or the closing process, if the driver or passenger actively controls the unlocking lever during closing, the unlocking lever can affect the movement of the small latch; that is, the unlocking lever needs to be able to engage and disengage with the small latch. Summary of the Invention

[0005] In order to enable the unlocking lever to engage and disengage with the latch, this application provides a lever assembly for a self-closing door lock.

[0006] The pull rod assembly for a self-closing door lock provided in this application adopts the following technical solution:

[0007] A lever assembly for a self-closing door lock includes:

[0008] The housing is a component used to install the self-closing door lock, located at the corresponding door lock pillar position of the vehicle door.

[0009] The large latch is rotatably connected to the housing. The large latch has a lock groove for locking the door lock cylinder and a limiting surface for locking itself. When the large latch rotates away from the vehicle body, it can lock the door lock cylinder.

[0010] The push rod body is used to push the large lock tongue to rotate away from the vehicle body;

[0011] The small latch is equipped with a second torsion spring, which provides a force for the small latch to rotate toward the large latch. When the small latch rotates to the position of the lock groove or the limiting surface, the small latch can lock the rotation of the large latch.

[0012] The unlocking lever is rotatably connected to the housing and can rotate coaxially with the small lock tongue.

[0013] The clutch is connected to the small latch and rotates synchronously with it. The clutch has a clutch part. When the small latch locks the large latch and rotates, the clutch part abuts against the unlocking lever. When the small latch rotates away from the large latch under the drive of the large latch, the clutch part disengages from the unlocking lever. When the clutch part abuts against the unlocking lever, rotating the unlocking lever can drive the clutch and the small latch to rotate away from the large latch.

[0014] By adopting the above solution, when the automatic door lock enters a half-lock state due to insufficient closing force from the driver and passengers, the small latch rotates to the lock groove position, preventing the large latch from rotating towards the vehicle body. This reduces the probability of the automatic door lock returning to the open state from the half-lock state, and reduces the probability of the half-locked door being accidentally opened, thus ensuring the safety of the driver and passengers. After the automatic door lock enters the half-lock state, the push rod body pushes the large latch to rotate away from the vehicle body. After the small latch rotates to the limit surface position, it locks the rotation of the large latch. The large latch uses the lock groove to lock the door lock cylinder, and the automatic door lock achieves a fully locked state, with the door completely closed.

[0015] When the self-closing door lock is in the half-lock or fully-locked state, the clutch part is in contact with the unlocking lever. If the driver or passenger needs to open the door at this time, the driver or passenger pulls the door handle to rotate the unlocking lever. The unlocking lever causes the clutch and the small latch to rotate away from the large latch, the small latch is released from the lock of the large latch, and the large latch rotates towards the vehicle body, thus switching the self-closing door lock to the open state.

[0016] During the transition from the unlocked to the half-locked state and from the engaged to the fully locked state of the self-closing door lock, the clutch, driven by the small latch, rotates from the position far from the unlocking lever to the position of the unlocking lever, and just comes into contact with the unlocking lever after the state transition. During the transition, the clutch does not contact the unlocking lever, and therefore cannot actively affect the movement of the unlocking lever, that is, it cannot actively affect the movement of the door handle.

[0017] During the state transition process described above, when the driver or passenger pulls the door handle to open the door, the unlocking lever near the small latch actively rotates towards the clutch part that is moving towards the unlocking lever. The unlocking lever actively abuts against the clutch part, and the unlocking lever drives the clutch and the small latch to rotate away from the large latch. The small latch releases the large latch, and the large latch rotates towards the vehicle body, thus switching the self-closing door lock to the open state.

[0018] The small latch cannot move the unlocking lever during the closing process. However, when the driver or passenger actively controls the unlocking lever during the closing process, the unlocking lever can move the small latch and unlock the door. The unlocking lever and the small latch are controlled by a clutch, which reduces the probability of the door handles moving when no one is operating them, thus improving the user experience for the driver and passengers.

[0019] Preferably, the push rod body is connected to a driving component, which can drive the push rod body to move towards the large lock tongue. The end of the push rod body can abut against the large lock tongue and push the large lock tongue to rotate. The unlocking lever is provided with a guide part at one end near the push rod body. The guide part is inclined from the end away from the large lock tongue to the end near the large lock tongue and away from the vehicle body. The push rod body can move towards the large lock tongue along the guide part.

[0020] By adopting the above scheme, the push rod body moves along the length direction towards the large latch and moves along the inclined direction of the guide. The end of the push rod body that is inclined can better move with the rotating large latch and maintain the stability of the push rod body at the contact position with the large latch.

[0021] Preferably, if the unlocking lever is rotated when the push rod body moves toward the large lock tongue or when the push rod body abuts against the large lock tongue, the unlocking lever drives the small lock tongue to rotate away from the large lock tongue through the clutch, and at the same time the guide part pryes the push rod body to rotate away from the large lock tongue, so that the push rod body disengages from the large lock tongue.

[0022] By adopting the above solution, when the user opens the door while the push rod body is moving towards the large latch and when the push rod body is in contact with the large latch, the user rotates the unlocking lever. The guide part pushes the push rod body to separate from the large latch. The rotating guide part releases the push rod body from contact with the large latch and the interference of the movement trajectory. At the same time, the unlocking lever drives the small latch to rotate away from the large latch. The small latch releases the restriction on the large latch, and the large latch rotates to the unlocked state to release the door lock cylinder.

[0023] Preferably, when the push rod body is located away from the large latch, the push rod body is separated from the guide part, and when the unlocking lever rotates, the rotation radius of the guide part is less than the distance between the inclined part and the rotation center of the guide part.

[0024] By adopting the above solution, when the door is closed, the guide part does not abut against the push rod body when the user turns the unlocking lever to unlock it. This avoids the push rod body generating resistance to the unlocking lever when the user opens the door, improves the smoothness and comfort of the unlocking lever rotation, and enhances the user's feel when opening the door.

[0025] Preferably, the push rod body is provided with an abutment portion that protrudes toward the large latch. A support member is provided on the housing at the position corresponding to the abutment portion, and the support member protrudes toward the push rod body. When the push rod body moves away from the large latch along its own length direction, the abutment portion can abut against the support member, and the push rod body moves away from the large latch along its own width direction under the action of the support member.

[0026] By adopting the above solution, the support and the abutment work together to move the push rod body away from the large latch in both its length and width directions. This effectively shortens the distance the push rod body moves along its length and reduces the length of the push rod body, thus minimizing the adverse effects of the push rod body length and range of motion on the size of the self-closing door lock.

[0027] Preferably, the housing has a through groove at the end of the unlocking lever away from the small latch, and the unlocking lever extends out of the through groove from the side of the housing away from the small latch, allowing the unlocking lever to rotate within the through groove.

[0028] By adopting the above solution, the unlocking lever extends from the side of the housing away from the small lock tongue through the slot, making reasonable use of the space on both sides of the housing, increasing the installation density of components, reducing the size of the self-closing door lock, and making it easier to replace the existing lock cylinder.

[0029] In summary, this application has the following beneficial effects:

[0030] 1. The small latch cannot drive the unlocking lever during the closing process. However, when the driver or passenger actively controls the unlocking lever during the closing process, the unlocking lever can drive the small latch to move and unlock. The unlocking lever and the small latch are controlled by a clutch, which reduces the probability of the handles inside and outside the door moving when no one is operating them, and improves the user experience of the driver and passenger.

[0031] 2. As the push rod body moves along the length direction toward the large latch, it moves along the inclined direction of the guide. The inclined end of the push rod body can better move with the rotating large latch, maintaining the stability of the push rod body at the contact position with the large latch.

[0032] 3. When the door is closed, the guide part does not abut against the push rod body when the user turns the unlocking lever to unlock it. This avoids the push rod body from generating resistance to the unlocking lever when the user opens the door, improves the smoothness and comfort of the unlocking lever rotation, and enhances the user's feel when opening the door. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of a pull rod assembly for a self-closing door lock according to an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the unlocking state of a lever assembly for a self-closing door lock according to an embodiment of this application;

[0035] Figure 3 This is an exploded view of a lever assembly for a self-closing door lock according to an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the protruding push rod body of a pull rod assembly for a self-closing door lock according to an embodiment of this application;

[0037] Figure 5 This is a schematic diagram of the protruding large latch of a lever assembly for a self-closing door lock according to an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the protruding lock groove of a lever assembly for a self-closing door lock according to an embodiment of this application;

[0039] Figure 7 This is an exploded view of a pull rod assembly for a self-closing door lock according to an embodiment of this application, showing that the protruding clutch portion and the small lock tongue are integrally formed.

[0040] Figure 8 This is an exploded view of a protruding clutch component of a lever assembly for a self-closing door lock according to an embodiment of this application;

[0041] Figure 9 This is a schematic diagram of the semi-locked state of a lever assembly for a self-closing door lock according to an embodiment of this application;

[0042] Figure 10 This is a schematic diagram of the engaging state of a lever assembly for a self-closing door lock according to an embodiment of this application;

[0043] Figure 11 This is a schematic diagram of the fully locked state of a lever assembly for a self-closing door lock according to an embodiment of this application.

[0044] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Microswitch; 12. Through slot; 2. Large latch; 21. First friction surface; 22. First torsion spring; 23. Push part; 24. Lock groove; 25. Lock stop part; 26. Limiting surface; 3. Small latch; 31. Second friction surface; 32. Second torsion spring; 33. Trigger part; 4. Push rod assembly; 41. Cable; 42. Connecting rod; 43. Third torsion spring; 44. Push rod body; 441. Compression spring; 442. Abutment part; 443. Support member; 444. Inclined part; 5. Unlocking lever; 51. Guide part; 52. Clutch member; 53. Clutch part; 54. Insertion part. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0046] This application discloses a lever assembly for a self-closing door lock. (Refer to...) Figure 1 and Figure 2 It includes a housing 1, a large latch 2 and a small latch 3 rotatably connected to the housing 1, and a push rod assembly 4 that drives the large latch 2 to rotate.

[0047] Reference Figure 1 and Figure 2 The large latch 2 has a lock groove 24 with an open end. The door lock pillar of the vehicle body can be inserted into the lock groove 24. When the self-closing door lock is in the open state, the lock groove 24 faces the door lock pillar of the vehicle body. During the closing process, the door lock pillar is inserted into the lock groove 24 and impacts the large latch 2 at the position corresponding to the lock groove 24. Under the impact, the large latch 2 near the position of the lock groove 24 rotates away from the vehicle body. During the rotation, the lock groove 24 faces the small latch 3. When the door is closed, the lock groove 24 is away from the vehicle body.

[0048] Reference Figure 2 and Figure 3 The large latch 2 and the small latch 3 are located in the same plane and can abut against each other. The large latch 2 is provided with a first friction surface 21, and the small latch 3 is provided with a second friction surface 31. The first friction surface 21 and the second friction surface 31 can abut against each other. The first friction surface 21 and the second friction surface 31 are arranged in an arc shape, with the arc opening facing the rotational connection of the large latch 2. The first friction surface 21 and the second friction surface 31 are tangent. When the locking groove 24 of the large latch 2 faces the vehicle body, the first friction surface 21 abuts against the second friction surface 31. The large latch 2 is connected to the housing 1 by a first torsion spring 22. The first torsion spring 22 exerts a force on the locking groove 24 of the large latch 2 towards the rotation of the vehicle body. The small latch 3 is connected to the housing 1 by a second torsion spring 32. The second torsion spring 32 exerts a force on the second friction surface 31 of the small latch 3 towards the rotation of the large latch 2. When the force of the door lock cylinder striking the large latch 2 is small, and the self-closing door lock is in a half-locked state, the lock groove 24 of the large latch 2 faces the small latch 3. The small latch 3 can be inserted into the lock groove 24 at the position corresponding to the second friction surface 31. The small latch 3 overcomes the torque of the first torsion spring 22 on the large latch 2 and prevents the large latch 2 from rotating towards the vehicle body. At the same time, the small latch 3 and the large latch 2 cooperate to restrict the door lock cylinder in the lock groove 24.

[0049] Reference Figure 2 and Figure 3The push rod assembly 4 includes a drive component, a cable 41, a connecting rod 42, and a push rod body 44. The middle part of the connecting rod 42 is rotatably connected to the housing 1. The connecting rod 42 is positioned away from the large latch 2 on the small latch 3. The two ends of the connecting rod 42 are respectively connected to the cable 41 and the push rod body 44. The connecting rod 42 and the housing 1 are connected together by a third torsion spring 43. The third torsion spring 43 provides a force to rotate the end of the connecting rod 42 connected to the push rod body 44 away from the large latch 2. The drive component is connected to the end of the cable 41 away from the connecting rod 42. The drive component can be a motor, hydraulic cylinder, pneumatic cylinder, or DC push rod motor. The drive component can tighten the cable 41 to overcome the torque of the third torsion spring 43 and drive the connecting rod 42 to rotate. The drive component can also drive the connecting rod 42 to rotate towards the large latch 2 via the cable 41. The push rod body 44 and the housing 1 are connected by a compression spring 441, which exerts a force on the push rod body 44 to move towards the large locking tongue 2 along the width direction of the push rod body 44.

[0050] Reference Figure 3 and Figure 4 The push rod body 44 has an abutment portion 442 near the large latch 2, which protrudes towards the large latch 2. A support member 443 is provided on the housing 1 at the corresponding position of the abutment portion 442, protruding towards the push rod body 44. The support member 443 can be a sphere, cylinder, pyramid, or curved protrusion, and can be made of plastic or wear-resistant metal. The support member 443 can be fixed to the housing 1, integrally formed with the housing 1, or injection molded and coated with the housing 1. When the push rod body 44 moves away from the large latch 2 along its length, the abutment portion 442 abuts against the support member 443, and the push rod body 44 moves away from the large latch 2 along its width under the action of the abutment portion 442 and the support member 443.

[0051] Reference Figure 3 and Figure 5A push-receiving part 23 is provided at a position away from the lock groove 24 on the large latch 2. The push-receiving part 23 protrudes from the large latch 2 and can abut against the end of the push rod body 44 away from the connecting rod 42. The end of the push rod body 44 near the connecting rod 42 is rotatably connected to the connecting rod 42. When the end of the connecting rod 42 near the push rod body 44 rotates toward the large latch 2, the push rod body 44 moves toward the large latch 2 along its own length direction. The push rod body 44 abuts against the push-receiving part 23 to push the large latch 2 to rotate away from the vehicle body. When the large latch 2 and the small latch 3 are in a half-locked state, the drive component drives the push rod body 44 toward the large latch 2 through the cable 41 and the connecting rod 42. The push rod body 44 pushes the large latch 2 to rotate away from the vehicle body through the push-receiving part 23. Since the door lock cylinder is inserted into the lock groove 24 and is restricted by the large lock tongue 2 and the small lock tongue 3, and the door lock cylinder is fixed to the corresponding door position on the vehicle body, when the lock groove 24 area of ​​the large lock tongue 2 rotates away from the vehicle body, the self-closing door lock moves towards the vehicle body under the reaction force from the door lock cylinder on the large lock tongue 2. That is, the self-closing door lock and the door move towards the vehicle body under the reaction force, thereby realizing the action of closing the door in place.

[0052] Reference Figure 5 and Figure 6 The large latch 2 has a limiting surface 26 corresponding to the lock groove 24 near the vehicle body. The limiting surface 26 is arc-shaped, and the arc opening is away from the rotational connection between the large latch 2 and the housing 1. When the door is closed, the lock groove 24 rotates away from the vehicle body, and the second friction surface 31 of the small latch 3 abuts against the limiting surface 26 of the large latch 2. After the small latch 3 and the limiting surface 26 of the large latch 2 cooperate, the rotation of the large latch 2 is restricted, thereby locking the door lock cylinder. Then the drive component resets, the cable 41 is released, the third torsion spring 43 drives the connecting rod 42 to rotate back to its original position, and then drives the push rod body 44 to move away from the large latch 2, separating the push rod body 44 from the pushed part 23 of the large latch 2.

[0053] Reference Figure 7 and Figure 8 A trigger part 33 is provided at a position away from the second friction surface 31 of the small latch 3. The trigger part 33 extends along the plane of the small latch 3. A micro switch 11 is fixedly connected to the housing 1 at the position corresponding to the trigger part 33. When the second friction surface 31 of the small latch 3 rotates away from the large latch 2, the trigger part 33 can press the micro switch 11. When the second friction surface 31 of the small latch 3 is located at the position of the lock groove 24 or the limiting surface 26, the trigger part 33 releases the micro switch 11. The controller of the drive unit detects the rotation posture of the small latch 3 by pressing and releasing the micro switch 11, thereby determining the state of the large latch 2, the half-lock state of the self-closing door lock, and the state of the door opening and closing.

[0054] Reference Figure 2 and Figure 8A locking part 25 is provided at the position between the large latch 2 and the locking groove 24 and the limiting surface 26. The distance from the locking part 25 to the rotational connection of the large latch 2 is equal to the distance from the first friction surface 21 to the rotational connection of the large latch 2. The locking part 25 can abut against the second friction surface 31 of the small latch 3. When the push rod body 44 pushes the large latch 2 from the half-locked state to the closed state, that is, when the locking groove 24 of the large latch 2 rotates from facing the small latch 3 to moving away from the vehicle body, the locking part 25 abuts against the second friction surface 31 of the small latch 3 and pushes the small latch 3 away from the large latch 2. The pushing part 23, the first friction surface 21, the locking groove 24, the locking part 25 and the limiting surface 26 are arranged sequentially along the arc contour of the large latch 2, and the arc opening of the arc contour of the large latch 2 faces the rotational connection between the large latch 2 and the housing 1.

[0055] Reference Figure 7 and Figure 8 A locking lever 5 is rotatably connected to the housing 1 at the position corresponding to the small latch 3. The locking lever 5 rotates coaxially with the small latch 3. One end of the locking lever 5 is provided with a guide part 51, which tilts from the direction closer to the large latch 2 to the direction farther away from the large latch 2. The push rod body 44 is provided with an inclined part 444 at the position corresponding to the guide part 51, and the tilt direction of the inclined part 444 is the same as the tilt direction of the guide part 51. During the movement of the push rod body 44 toward the large latch 2, the inclined part 444 can abut against the guide part 51 and move along the guide part 51 toward the pushed part 23. When the push rod body 44 is located away from the push portion 23, the abutting portion 442 abuts against the support member 443, the push rod body 44 is separated from the guide portion 51, and when the unlocking lever 5 rotates, the rotation radius of the guide portion 51 is less than the distance between the tilting portion 444 and the rotation center of the guide portion 51. That is, when the push rod body 44 is located away from the push portion 23, the guide portion 51 cannot abut against the push rod body 44 when the unlocking lever 5 rotates.

[0056] Reference Figure 3 and Figure 9 The housing 1 has a through groove 12 at the end of the unlocking lever 5 away from the guide part 51. The unlocking lever 5 extends out of the through groove 12 and can rotate within it. A clutch 52 is rotatably connected to the unlocking lever 5. The clutch 52 rotates coaxially with the unlocking lever 5. The clutch 52 has a plug-in part 54 that plugs into the small latch 3. The clutch 52 drives the small latch 3 to rotate through the plug-in part 54. The clutch 52 also has a clutch part 53 that abuts against the side of the unlocking lever 5 away from the large latch 2. When the end of the unlocking lever 5 away from the push rod body 44 rotates towards the large latch 2, the side of the unlocking lever 5 away from the large latch 2 drives the clutch part 53 to rotate away from the large latch 2.

[0057] In another embodiment of this application, the clutch part 53 is directly disposed on the side of the small latch 3 near the unlocking lever 5, and is integrally formed with the small latch 3.

[0058] Reference Figure 2 , Figure 9 , Figure 10 and Figure 11 The relative positional relationship between the large latch 2, the small latch 3, and the clutch 52 has multiple states:

[0059] When the door is open, the lock groove 24 of the large lock tongue 2 faces the door lock post, the first friction surface 21 of the large lock tongue 2 abuts against the second friction surface 31 of the small lock tongue 3, the trigger part 33 of the small lock tongue 3 presses the micro switch 11, the clutch part 53 of the clutch 52 does not abut against the unlocking lever 5, the push rod body 44 is located away from the large lock tongue 2, and the push rod body 44 does not abut against the push part 23 of the large lock tongue 2;

[0060] In the half-locked state, the lock groove 24 of the large lock tongue 2 faces the second friction surface 31 of the small lock tongue 3. The second friction surface 31 of the small lock tongue 3 rotates towards the large lock tongue 2. The second friction surface 31 is located at the opening of the lock groove 24. The trigger part 33 of the small lock tongue 3 releases the micro switch 11. The clutch part 53 of the clutch 52 abuts against the unlocking lever 5. The push rod body 44 remains in the open position.

[0061] In the engaged state, the large latch 2 continues to rotate away from the door lock pillar at the lock groove 24 position, the locking part 25 abuts against the second friction surface 31, the small latch 3 rotates away from the large latch 2 at the second friction surface 31 position, the trigger part 33 presses the micro switch 11, the clutch part 53 of the clutch 52 disengages from the unlocking lever 5, the push rod body 44 moves towards the large latch 2, the push rod body 44 abuts against the pushed part 23 to push the large latch 2 to continue rotating, the inclined part 444 of the push rod body 44 abuts against the guide part 51 of the unlocking lever 5;

[0062] In the fully locked state (door closed), the lock groove 24 of the large latch 2 faces away from the door lock pillar, the limiting surface 26 of the large latch 2 rotates to the position of the second friction surface 31 of the small latch 3, the position of the second friction surface 31 of the small latch 3 rotates to the position close to the large latch 2, the trigger part 33 releases the micro switch 11, the clutch part 53 of the clutch 52 abuts against the unlocking lever 5, and the push rod body 44 moves to the limit in the direction of the large latch 2.

[0063] The implementation principle of a lever assembly for a self-closing door lock according to an embodiment of this application is as follows:

[0064] When the self-closing door lock enters a half-lock state due to insufficient closing force from the driver and passengers, the small latch 3 rotates to the lock groove 24 position. The small latch 3 prevents the large latch 2 from rotating towards the vehicle body, reducing the probability of the self-closing door lock returning to the open state from the half-lock state, reducing the probability of the half-locked door being accidentally opened, and ensuring the safety of the driver and passengers. After the self-closing door lock enters the half-lock state, the push rod body 44 pushes the large latch 2 to rotate away from the vehicle body. After the small latch 3 rotates to the limit surface 26 position, it locks the rotation of the large latch 2. The large latch 2 uses the lock groove 24 to lock the door lock pillar, and the self-closing door lock achieves a fully locked state, and the door is completely closed.

[0065] When the self-closing door lock is in a half-locked or fully-locked state, the clutch part 53 abuts against the unlocking lever 5. If the driver or passenger needs to open the door at this time, the driver or passenger pulls the door handle to drive the unlocking lever 5 to rotate. The unlocking lever 5 drives the clutch part 52 and the small lock tongue 3 to rotate away from the large lock tongue 2. The small lock tongue 3 is released from the lock of the large lock tongue 2, and the large lock tongue 2 rotates towards the vehicle body, and the self-closing door lock switches to the open state.

[0066] During the transition from the unlocked state to the half-locked state and from the engaged state to the fully locked state of the self-closing door lock, the clutch part 53, driven by the small latch 3, rotates from the position far from the unlocking lever 5 to the position of the unlocking lever 5, and just comes into contact with the unlocking lever 5 after the state transition. During the transition, the clutch part 53 does not contact the unlocking lever 5, and therefore cannot actively affect the movement of the unlocking lever 5, that is, it cannot actively affect the movement of the door handle.

[0067] During the state transition process described above, when the driver or passenger pulls the door handle to open the door, the unlocking lever 5, located near the small latch 3, actively rotates towards the clutch part 53, which is moving towards the unlocking lever 5. The unlocking lever 5 actively abuts against the clutch part 53, and the unlocking lever 5 drives the clutch 52 and the small latch 3 to rotate away from the large latch 2. The small latch 3 releases the large latch 2, and the large latch 2 rotates towards the vehicle body, thus switching the self-closing door lock to the open state.

[0068] During the closing process, the small latch 3 cannot drive the unlocking lever 5 to move. However, when the driver or passenger actively controls the unlocking lever 5 during the closing process, the unlocking lever 5 can drive the small latch 3 to move and unlock. The unlocking lever 5 and the small latch 3 achieve clutch control, reducing the probability of the door handles moving when no one is operating them, and improving the user experience of the driver and passenger.

[0069] This embodiment enables the unlocking lever 5 to engage / disengage with the small latch 3.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lever assembly for a self-closing door lock, characterized in that, include: The housing (1) is located at the corresponding door lock pillar position of the car door and is used to install the self-closing door lock components; The large latch (2) is rotatably connected to the housing (1). When the large latch (2) rotates away from the vehicle body, the large latch (2) can lock the door lock column. The push rod body (44) is used to push the large latch (2) to rotate away from the vehicle body; The small latch (3) is rotatably connected to the housing (1). The small latch (3) can rotate toward the large latch (2). The small latch (3) is used to lock the rotation of the large latch (2). The unlocking lever (5) is rotatably connected to the housing (1) and rotates coaxially with the small lock tongue (3); The clutch (53) is located on the small latch (3) and rotates synchronously with the small latch (3). When the small latch (3) locks the large latch (2) and rotates, the clutch (53) abuts against the unlocking lever (5). When the small latch (3) rotates away from the large latch (2) under the drive of the large latch (2), the clutch (53) disengages from the unlocking lever (5). When the clutch (53) abuts against the unlocking lever (5), rotating the unlocking lever (5) can drive the small latch (3) to rotate away from the large latch (2). The push rod body (44) is connected to a drive component, which can drive the push rod body (44) to move toward the large lock tongue (2). The end of the push rod body (44) can abut against the large lock tongue (2) and push the large lock tongue (2) to rotate. The unlocking lever (5) is provided with a guide part (51) at one end near the push rod body (44). The guide part (51) is inclined from the end away from the large lock tongue (2) toward the end near the large lock tongue (2) and away from the vehicle body. The push rod body (44) can move toward the large lock tongue (2) along the guide part (51). If the unlocking lever (5) is rotated when the push rod body (44) moves toward the large lock tongue (2) or when the push rod body (44) abuts against the large lock tongue (2), the unlocking lever (5) abuts against the clutch part (53), the clutch part (53) drives the small lock tongue (3) to rotate away from the large lock tongue (2), and at the same time the guide part (51) abuts against the push rod body (44), the push rod body (44) rotates away from the large lock tongue (2), and the push rod body (44) disengages from the large lock tongue (2); When the push rod body (44) is located away from the large lock tongue (2), the push rod body (44) is separated from the guide part (51), and when the unlocking lever (5) rotates, the rotation radius of the guide part (51) is less than the distance from the inclined part (444) to the rotation center of the guide part (51).

2. The pull rod assembly for a self-closing door lock according to claim 1, characterized in that: The push rod body (44) is provided with an abutment part (442), which protrudes towards the large latch (2). The housing (1) is provided with a support member (443) at the position corresponding to the abutment part (442), which protrudes towards the push rod body (44). When the push rod body (44) moves away from the large latch (2) along its own length direction, the abutment part (442) can abut against the support member (443), and the push rod body (44) moves away from the large latch (2) along its own width direction under the action of the support member (443).

3. A lever assembly for a self-closing door lock according to claim 1, characterized in that: The housing (1) has a through groove (12) at the end of the unlocking lever (5) away from the small lock tongue (3). The unlocking lever (5) extends out of the through groove (12) from the side of the housing (1) away from the small lock tongue (3) and can rotate in the through groove (12).

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