A push rod assembly for a self-sucking door lock

Abstract

The application relates to a push rod assembly for a self-suction door lock, belonging to the field of automobile door locks, comprising a machine shell, the machine shell is rotationally connected with a large lock tongue and a small lock tongue for locking a door lock column, the machine shell is rotationally connected with a connecting rod, the connecting rod is connected with a driving piece for driving the connecting rod to rotate, the connecting rod is rotationally connected with a push rod body, the push rod body can be driven to move close to or away from the large lock tongue when the connecting rod reciprocally rotates, and the push rod body can drive the large lock tongue to rotate and lock the door lock column when moving close to the large lock tongue. The push rod body is provided with an abutting portion, the abutting portion protrudes towards the large lock tongue, the machine shell is provided with a supporting piece, the abutting portion can abut against the supporting piece, the abutting portion abuts against the supporting piece when the push rod body moves away from the large lock tongue along the length direction of the push rod body, and the push rod body moves away from the large lock tongue along the width direction of the push rod body under the action of the abutting portion and the supporting piece. The application reduces the adverse influence of the length and movement range of the push rod body on the size of the self-suction door lock.

Description

Technical Field

[0001] This application relates to the field of automotive door locks, and in particular to a push rod assembly for a self-closing door lock. Background Technology

[0002] During the closing process of a car door, insufficient closing force or excessive resistance from the door seal often results in the door not closing completely, leaving the door lock in a semi-locked state, posing a significant safety hazard. Conversely, excessive closing force causes the door to collide with the vehicle body, producing loud noise and causing impact. Both excessive and insufficient closing force negatively affect the user experience, making it difficult for users to determine the appropriate closing force and resulting in a poor door usability.

[0003] To make closing doors simple and easy, and improve the door-closing experience for drivers and passengers, self-closing door locks are often installed on car doors. The main structure of a self-closing door lock includes a housing, a large latch, a small latch, an unlocking lever, and a push rod assembly that drives the large latch. After the car door lock enters the semi-locked state, the push rod of the push rod assembly pushes the large latch to continue rotating until the door lock pin is locked.

[0004] Regarding the aforementioned technologies, the large latch, small latch, and unlocking lever primarily rotate during the opening and closing of the door, while the push rod assembly's push rod body primarily reciprocates along its own length. The length and range of motion of the push rod body have a significant impact on the dimensions of the self-closing door lock. Summary of the Invention

[0005] In order to reduce the adverse effects of the push rod body length and range of motion on the size of the self-closing door lock, this application provides a push rod assembly for a self-closing door lock.

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

[0007] A push rod assembly for a self-closing door lock includes a housing, a large latch and a small latch rotatably connected to the housing for locking the door lock cylinder, a connecting rod rotatably connected to the housing, a drive member connected to the connecting rod for rotating the connecting rod, and a push rod body rotatably connected to the connecting rod. When the connecting rod reciprocates, it can drive the push rod body to move closer to or away from the large latch. When the push rod body moves closer to the large latch, it can push the large latch to rotate and lock the door lock cylinder. The push rod body is provided with an abutment portion that protrudes towards the large latch. The housing is provided with a support member, and the abutment portion can abut against the support member. When the push rod body moves away from the large latch along its own length direction, the abutment portion abuts against the support member. Under the action of the abutment portion and the support member, the push rod body moves away from the large latch along its own width direction.

[0008] By adopting the above scheme, after the door lock cylinder and the large lock tongue enter the half-lock state, the drive component drives the push rod body to rotate towards the large lock tongue via the connecting rod. The push rod body pushes the large lock tongue to rotate to the fully locked state, realizing the door's magnetic locking. After the large lock tongue locks the door lock cylinder, the drive component drives the connecting rod to reverse, and the connecting rod drives the push rod body to move away from the large lock tongue, separating the push rod body from the large lock tongue. This removes the interference of the push rod body on the rotation range of the large lock tongue, facilitating the smooth rotation of the large lock tongue when opening the door. As the push rod body moves away from the large lock tongue along its own length direction, the abutment part abuts against and rubs against the support member. The support member uses the abutment part to push the push rod body away from the large lock tongue along its width direction. The push rod body simultaneously moves away from the large lock tongue along both its own length and width directions. The support and abutment work together to move the push rod body away from the large latch simultaneously along 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 dimensions of the self-closing door lock.

[0009] Preferably, the push rod body has a curved part at the end near the large latch, the curved part bends away from the large latch, and the end of the curved part away from the connecting rod can abut against the large latch and push the large latch to rotate.

[0010] By adopting the above scheme, the curved part that bends away from the large latch makes it easier for the push rod body to move away from the large latch along its own length direction while quickly separating from the arc-shaped large latch, thus shortening the length and range of motion of the push rod body and improving the reaction speed of the push rod body.

[0011] Preferably, the push rod body and the housing are connected by a compression spring, which applies a force to the push rod body as it approaches the support.

[0012] By adopting the above solution, the compression spring applies a force to the push rod body near the support to improve the stability of the push rod body during its movement. The posture and angle of the self-closing door lock installed on the car door have a certain degree of uncertainty. The compression spring reduces the influence of gravity on the movement trajectory of the push rod body. At the same time, the compression spring applies a force to the push rod body along the width direction near the large latch, improving the stability of the push rod body in contact with the large latch during the process of pushing the large latch to rotate.

[0013] Preferably, the small latch is connected to an unlocking lever that drives the small latch to rotate. The unlocking lever has an inclined guide at one end near the push rod body, and the push rod body has an inclined part at the corresponding position of the guide. The push rod body can move along the guide to the large latch under the push of the connecting rod.

[0014] By adopting the above scheme, the inclined part and the guide part work together to improve the trajectory stability of the push rod body during the movement of the large locking tongue, thereby improving the stability of the large locking tongue rotation.

[0015] Preferably, the guide portion is inclined from the direction closer to the large latch to the direction farther away from the large latch, and the inclination direction of the inclined portion is the same as the inclination direction of the guide portion.

[0016] 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.

[0017] Preferably, when the push rod body is located near the large latch, the inclined part abuts against the guide part. If the unlocking lever rotates at this time, the guide part can push the push rod body to separate from the large latch.

[0018] 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.

[0019] Preferably, when the push rod body is located away from the large latch, the abutting part abuts against the support member, the push rod body is separated from the guide part, and the guide part cannot abut against the push rod body when the unlocking lever rotates.

[0020] 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.

[0021] Preferably, the connecting rod and the housing are connected by a third torsion spring, which drives the connecting rod to rotate away from the large locking tongue at the end near the push rod body.

[0022] By adopting the above scheme, the torque of the third torsion spring improves the smoothness of the push rod body when it moves away from the large latch. After the drive component relaxes its control over the connecting rod, the third torsion spring drives the connecting rod and the push rod body to reset.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. The support and abutment parts 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.

[0025] 2. The curved section facilitates the push rod body to move away from the large latch along its own length direction while quickly separating from the arc-shaped large latch, shortening the length and range of motion of the push rod body and improving the reaction speed of the push rod body.

[0026] 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

[0027] Figure 1 This is a schematic diagram of the overall structure of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the unlocking state of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0029] Figure 3 This is an exploded view of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the protruding push rod body of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the protruding large latch of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0032] Figure 6 This is an exploded view of the protruding small latch of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0033] Figure 7 This is a schematic diagram of the semi-locked state of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of the engaging state of a push rod assembly for a self-closing door lock according to an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of the fully locked state of a push rod assembly for a self-closing door lock according to an embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Large latch; 21. First friction surface; 22. First torsion spring; 23. Pushing part; 24. Lock groove; 25. Limiting surface; 3. Small latch; 31. Second friction surface; 32. Second torsion spring; 33. Triggering part; 41. Cable; 42. Connecting rod; 43. Third torsion spring; 44. Push rod body; 441. Compression spring; 442. Abutting part; 443. Support member; 444. Inclined part; 445. Bending part; 5. Unlocking lever; 51. Guide part. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0038] This application discloses a push rod assembly for a self-closing door lock. (Refer to...) Figures 1-3 The system includes a housing 1, with a large latch 2 and a small latch 3 rotatably connected to the housing 1. The large latch 2 has a latch groove 24 with one end open, into which the door lock cylinder of the vehicle can be inserted. A push-receiving part 23 is fixedly connected to the large latch 2 away from the latch groove 24. The large latch 2 and the housing 1 are connected together by a first torsion spring 22, which provides a force to the large latch 2 to rotate towards the door lock cylinder at the position of the latch groove 24.

[0039] Reference Figure 2 and Figure 3 A first friction surface 21 is provided near the lock groove 24 on the large latch 2. The first friction surface 21 is arc-shaped, with the arc facing the rotational connection between the large latch 2 and the housing 1. A second friction surface 31 is provided near the large latch 2 on the small latch 3. The second friction surface 31 is arc-shaped, with the arc facing the large latch 2. The second friction surface 31 can abut against the first friction surface 21 and is tangential to the first friction surface 21. A second torsion spring 32 is connected to both the small latch 3 and the housing 1. The second torsion spring 32 provides a force to the second friction surface 31 of the small latch 3 to encourage the rotation of the large latch 2.

[0040] Reference Figure 2 and Figure 3 A limiting surface 25 is provided at a position of the large latch 2 away from the first friction surface 21 corresponding to the locking groove 24. The limiting surface 25 is arc-shaped, and the arc opening is away from the rotational connection between the large latch 2 and the housing 1. The push part 23, the first friction surface 21, the locking groove 24 and the limiting surface 25 are arranged sequentially along the arc contour of the large latch 2. 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. The limiting surface 25 of the large latch 2 can cooperate with the second friction surface 31 of the small latch 3.

[0041] Reference Figure 3 and Figure 4A connecting rod 42 is rotatably connected to the housing 1 at a position away from the large latch 2. The middle part of the connecting rod 42 is rotatably connected to the housing 1. The connecting rod 42 is located on the side of the housing 1 corresponding to the small latch 3 away from the large latch 2. One end of the connecting rod 42 is fixedly connected to a cable 41, which is connected to a drive component capable of tightening the cable 41. The drive component can be a motor, a cylinder, or a hydraulic cylinder. The end of the connecting rod 42 away from the cable 41 is rotatably connected to a push rod body 44. The connecting rod 42 and the housing 1 are connected together to a third torsion spring 43. The third torsion spring 43 drives the end of the connecting rod 42 near the push rod body 44 to rotate away from the large latch 2. The end of the push rod body 44 near the large latch 2 is provided with a bent part 445. The bent part 445 bends away from the large latch 2, and the end of the bent part 445 away from the connecting rod 42 can abut against the pushed part 23 of the large latch 2. When the end of the connecting rod 42 near the cable 41 rotates away from the large locking tongue 2, the other end of the connecting rod 42 drives the push rod body 44 to move toward the large locking tongue 2.

[0042] 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. The support member 443 is independently fixed to the housing 1 or integrally formed. The support member 443 protrudes towards the push rod body 44 and can be a sphere, cylinder, pyramid, or curved protrusion. The material of the support member 443 can be plastic or wear-resistant metal. A compression spring 441 is connected to both the push rod body 44 and the housing 1, providing a force to the push rod body 44 as it approaches the support member 443. 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. Under the action of the abutment portion 442 and the support member 443, the push rod body 44 moves away from the large latch 2 along its width.

[0043] Reference Figure 5 , Figure 6 and Figure 7The small latch 3 is connected to an unlocking lever 5, which can drive the small latch 3 to rotate. A guide portion 51 is provided at the end of the unlocking lever 5 near the push rod body 44. The guide portion 51 is inclined from the direction near the large latch 2 to the direction away from the large latch 2. A tilted portion 444 is provided on the push rod body 44 at the position corresponding to the guide portion 51. The tilted portion 444 is in the same direction as the guide portion 51 and is located between the abutment portion 442 and the curved portion 445, and can abut against the guide portion 51. The push rod body 44 can move along the guide portion 51 towards the pushed portion 23 under the push of the connecting rod 42. When the push rod body 44 is located away from the pushed portion 23, the abutting portion 442 abuts against the support member 443, the push rod body 44 separates 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 pushed portion 23, the guide portion 51 cannot abut against the push rod body 44 when the unlocking lever 5 rotates.

[0044] Reference Figure 2 , Figure 7 , Figure 8 and Figure 9 The relative positional relationship between the large latch 2, the small latch 3, and the push rod body 44 has multiple states:

[0045] 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 push rod body 44 is located away from the large lock tongue 2, the abutting part 442 abuts against the support member 443, and the bent part 445 of the push rod body 44 does not abut against the pushed part 23 of the large lock tongue 2.

[0046] In the half-locked state, the large latch 2 rotates away from the door lock post at the position of the lock groove 24, and the small latch 3 rotates towards the large latch 2 at the position of the second friction surface 31. The second friction surface 31 is located at the opening position of the lock groove 24, and the push rod body 44 remains in the open position.

[0047] In the engaged state, the large latch 2 continues to rotate away from the door lock post at the lock groove 24 position, the small latch 3 rotates away from the large latch 2 at the second friction surface 31 position, the push rod body 44 moves towards the large latch 2, the bent part 445 abuts against the pushed part 23 to push the large latch 2 to continue rotating, the abutting part 442 of the push rod body 44 disengages from the support member 443, and the inclined part 444 of the push rod body 44 abuts against the guide part 51 of the unlocking lever 5 and slides relative to the guide part 51;

[0048] In the fully locked state, the push rod body 44 moves to the limit towards the large latch 2 and then retracts. The lock groove 24 of the large latch 2 faces away from the door lock pillar. The second friction surface 31 of the small latch 3 rotates to a position close to the large latch 2. The second friction surface 31 of the small latch 3 rotates to the position of the limiting surface 25 of the large latch 2. The small latch 3 restricts the rotation of the large latch 2 through the arc-shaped limiting surface 25.

[0049] The implementation principle of a push rod assembly for a self-closing door lock according to an embodiment of this application is as follows: After the door lock cylinder and the large latch 2 enter the half-lock state, the driving component drives the push rod body 44 to rotate towards the large latch 2 through the connecting rod 42. The push rod body 44 pushes the large latch 2 to rotate to the fully locked state, thereby achieving door closing and locking. After the large latch 2 locks the door lock cylinder, the driving component drives the connecting rod 42 to reverse, and the connecting rod 42 drives the push rod body 44 to move away from the large latch 2, causing the push rod body 44 to separate from the large latch 2. This removes the interference of the push rod body 44 on the rotation range of the large latch 2, facilitating the smooth rotation of the large latch 2 when opening the door.

[0050] As the push rod body 44 moves away from the large latch 2 along its own length direction, the abutment portion 442 abuts against and slides against the support member 443. The support member 443 uses the abutment portion 442 to push the push rod body 44 away from the large latch 2 along its width direction. The push rod body 44 moves away from the large latch 2 simultaneously along its own length and width directions. The curved portion 445 facilitates the push rod body 44's rapid separation from the arc-shaped large latch 2 while moving away from the large latch 2 along its own length direction. The cooperation of the support member 443 and the abutment portion 442 enables the push rod body 44 to move away from the large latch 2 simultaneously in both its own length and width directions, effectively shortening the distance the push rod body 44 moves along its own length direction and reducing the length of the push rod body 44.

[0051] When the door is closed, if the user turns the unlocking lever 5 to unlock, the unlocking lever 5 will cause the small latch 3 to rotate away from the large latch 2. The small latch 3 will then release its restriction on the large latch 2, and the large latch 2 will rotate to the unlocked position, releasing the door lock cylinder. The guide part 51 does not abut against the push rod body 44, thus avoiding resistance from the push rod body 44 to the unlocking lever 5 when the user opens the door. This improves the smoothness and comfort of the unlocking lever 5's rotation and enhances the user's feel when opening the door.

[0052] When the user opens the door while the push rod body 44 is moving towards the large latch 2 and when the push rod body 44 is in contact with the large latch 2, the user rotates the unlocking lever 5, and the guide part 51 pushes the push rod body 44 to separate from the large latch 2. The rotating guide part 51 releases the push rod body 44 from contact with the large latch 2 and from interference with the movement trajectory.

[0053] The embodiments of this application reduce the adverse effects of the length and range of motion of the push rod body 44 on the size of the self-closing door lock.

[0054] 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 push rod assembly for a self-sucking door lock, comprising a large lock tongue (2) and a small lock tongue (3) connected to a housing (1) for locking a door lock post, characterized in that: The shell (1) is rotationally connected with a connecting rod (42), the connecting rod (42) is connected with a driving member for driving the rotation of the connecting rod (42), the connecting rod (42) is rotationally connected with a push rod body (44), and the connecting rod (42) can drive the push rod body (44) to move close to or away from the large lock tongue (2) when the connecting rod (42) reciprocally rotates, and the push rod body (44) can push the large lock tongue (2) to rotate and lock the door lock post when the push rod body (44) moves close to the large lock tongue (2). A supporting member (443) is arranged on the movement path of the push rod body (44), and the supporting member (443) can drive the push rod body (44) to move away from the large lock tongue (2) along the width direction of the push rod body (44) when the push rod body (44) moves away from the large lock tongue (2) along the length direction of the push rod body (44). The push rod body (44) is provided with an abutting portion (442) which protrudes towards the large lock tongue (2), and the abutting portion (442) can abut against the supporting member (443), and the push rod body (44) moves away from the large lock tongue (2) along the length direction of the push rod body (44), and the abutting portion (442) abuts against the supporting member (443), and the push rod body (44) moves away from the large lock tongue (2) along the width direction of the push rod body (44) under the action of the abutting portion (442) and the supporting member (443). The push rod body (44) and the shell (1) are jointly connected with a compression spring (441), and the compression spring (441) provides a force for the push rod body (44) to move close to the supporting member (443). The small lock tongue (3) is connected with a unlocking pull rod (5) for driving the rotation of the small lock tongue (3), the unlocking pull rod (5) is provided with an inclined guide portion (51) at one end close to the push rod body (44), the push rod body (44) is provided with an inclined portion (444) at a position corresponding to the guide portion (51), and the push rod body (44) can move towards the large lock tongue (2) along the guide portion (51) under the pushing of the connecting rod (42). The small lock tongue (3) is inclined from the direction close to the large lock tongue (2) to the direction away from the large lock tongue (2), and the inclined direction of the inclined portion (444) is the same as the inclined direction of the guide portion (51).

2. A push rod assembly for a self-sucking door lock according to claim 1, wherein: The push rod body (44) is provided with a curved portion (445) at one end close to the large lock tongue (2), the curved portion (445) is curved away from the large lock tongue (2), and the end of the curved portion (445) away from the connecting rod (42) can abut against the large lock tongue (2) and push the large lock tongue (2) to rotate.

3. A push rod assembly for a self-sucking door lock according to claim 1, wherein: The supporting member (443) is independently connected to the shell (1) or integrally formed with the shell (1).

4. A push rod assembly for a self-sucking door lock according to claim 1, wherein: When the push rod body (44) is located at a position close to the large lock tongue (2), the inclined portion (444) abuts against the guide portion (51), and if the unlocking pull rod (5) rotates at this time, the guide portion (51) can push the push rod body (44) to separate from the large lock tongue (2).

5. A push rod assembly for a self-sucking door lock according to claim 1, wherein: When the push rod body (44) is located at a position away from the large lock tongue (2), the abutting portion (442) abuts against the supporting member (443), the push rod body (44) is separated from the guide portion (51), and the guide portion (51) cannot abut against the push rod body (44) when the unlocking pull rod (5) rotates.

6. A push rod assembly for a self-sucking door lock according to claim 1, wherein: The connecting rod (42) and the shell (1) are jointly connected with a third torsional spring (43), and the third torsional spring (43) drives the connecting rod (42) to rotate away from the large lock tongue (2) at one end close to the push rod body (44).

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