A safety spring and anti-mislocking structure for automotive door locks
By designing linkage and drive components in automotive door locks, the problem of preventing accidental locking under the space constraints of small car door locks has been solved, achieving stable connection of the safety spring and normal operation of the door lock, preventing accidental triggering and spring detachment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHAODA AUTO PARTS CO LTD
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-03
AI Technical Summary
Due to limited space, it is difficult to install anti-locking mechanisms in the door locks of small and micro cars, and the safety springs are inconvenient to operate during assembly and are prone to falling off.
A linkage assembly including a housing, a latch, a mounting post, a drive plate, a pawl, a linkage plate, and an anti-mislocking plate was designed. Through the linkage of the safety transition rod and the anti-mislocking spring, a stable connection between the safety spring and the drive plate is achieved, preventing the spring from falling off. The normal operation of the door lock is ensured by the motor and gear drive assembly.
This ensures stable assembly of the safety spring, prevents accidental activation of the safety mechanism, guarantees normal operation of the door lock in different states, and avoids the problem of spring detachment.
Smart Images
Figure CN224452475U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive door lock technology, and particularly relates to a safety spring and anti-mislocking structure for automotive door locks. Background Technology
[0002] Driven by demands for energy conservation, environmental protection, and convenience, various types of small and micro cars have been launched on the market. Due to the limited space in the door panels, the door locks are required to be small in size. However, due to the limitations of the spatial structure, it is difficult to set up anti-locking structures on the door locks. Furthermore, the safety springs are inconvenient to operate when assembling with the connecting parts and are prone to falling off. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a safety spring and anti-mislocking structure for vehicle door locks, comprising a housing, a latch rotatably disposed within the housing, and a first mounting post, a second mounting post, and a third mounting post fixedly disposed on the housing, characterized in that: the housing is provided with a drive assembly and a linkage assembly for opening the door lock, the linkage assembly including a drive plate rotatably disposed on the first mounting post, a pawl rotatably disposed from bottom to top on the second mounting post, a linkage plate, and an anti-mislocking plate, the drive plate and the linkage plate being connected by a safety transition rod, a fixing plate being fixed on the second mounting post, the fixing plate being provided with an anti-mislocking spring, one end of the anti-mislocking spring being connected to the anti-mislocking plate, and the other end being connected to the fixing plate, the lock wall of the anti-mislocking plate being in contact with the connecting arm of the pawl, the two ends of the safety transition rod being movably disposed on the linkage plate and the drive plate respectively, the fixing post being fixed on the housing, a safety spring being provided between the fixing post and the drive plate, one end of the safety spring being connected to the fixing post, and the other end being connected to the drive plate.
[0004] The present invention is further configured as follows: a groove is provided on the drive plate, one end of the safety transition rod near the drive plate is movably disposed in the groove, a connecting column is fixed on the drive plate, a first torsion spring is sleeved on the connecting column, one end of the first torsion spring is connected to the safety transition rod, a slot is provided on the linkage plate, the other end of the safety transition rod is movably disposed in the slot, a protrusion is provided at one end of the safety transition rod on the linkage plate and is fixedly connected to the safety transition rod, the anti-mislocking plate is bent upward on the side near the protrusion to form an anti-mislocking block integrally formed with the anti-mislocking plate, the anti-mislocking block is correspondingly disposed with the protrusion, and a slot is provided between the locking arm and the anti-mislocking block on the anti-mislocking plate for the movement of the protrusion fixedly connected to the safety transition rod when the locking tongue and pawl are in the locked state.
[0005] The present invention is further configured such that: the drive assembly includes a motor disposed within the housing, a gear disk rotatably disposed within the housing, and a cam fixedly disposed on the gear disk; the gear disk is configured to cooperate with the gear shaft of the motor, and the cam is configured to abut against the drive plate.
[0006] The present invention is further configured such that: the other end of the fixing plate is fixed on the third mounting post, the locking tongue is rotatably mounted on the third mounting post, and a second torsion spring is sleeved on the third mounting post, one end of the second torsion spring is connected to the housing, and the other end is connected to the locking tongue.
[0007] A further feature of this invention is that a swing groove is provided on the drive plate, and the fixed column is located in the swing groove.
[0008] The advantages of this utility model are as follows: the safety spring is not limited by the space between the housing and the drive plate; one end of the safety spring is connected to the fixed post, and the other end is connected to the drive plate in an L-shape or Z-shape, which makes assembly convenient and solves the problem of spring jumping out during the process.
[0009] When the door lock is open, the anti-misoperation block on the anti-misoperation arm contacts the protrusion on the safety transition bar, preventing the safety transition bar from moving to the engaged position. This prevents the safety system from being accidentally activated when the driver leaves the key inside the vehicle. When the door lock is closed, the pawl pushes the anti-misoperation arm to a position where the anti-misoperation block and the protrusion on the safety transition bar do not contact each other. The safety transition bar can then move within the slot between the lock arm and the anti-misoperation block on the anti-misoperation plate without affecting normal engagement and disengagement of the safety system. Attached Figure Description
[0010] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;
[0011] Appendix Figure 2 This is a schematic diagram of the internal structure of the present invention;
[0012] Appendix Figure 3 This is a schematic diagram of the structure of the anti-mislocking plate of this utility model, showing the contact between the locking wall and the connecting arm of the pawl 7.
[0013] Appendix Figure 4 This is a schematic diagram of the structure of the anti-locking spring, the anti-locking plate, and the fixing plate of this utility model;
[0014] Appendix Figure 5 This is a schematic diagram of the structure of the second torsion spring of this utility model, which is mounted on the third mounting post. Detailed Implementation
[0015] According to the appendix Figure 1-5This embodiment discloses a safety spring and anti-mislocking structure for a vehicle door lock, including a housing 1, a latch 2 rotatably disposed within the housing 1, and a first mounting post 3, a second mounting post 4, and a third mounting post 5 fixedly disposed on the housing 1. The housing 1 contains a drive assembly and a linkage assembly for engaging and disengaging the safety mechanism and opening the door lock. The linkage assembly includes a drive plate 6 rotatably disposed on the first mounting post 3, a pawl 7 rotatably disposed on the second mounting post 4 from bottom to top, a linkage plate 8, and an anti-mislocking plate 9. The drive plate 6 and the linkage plate 8 are connected by a safety transition rod 10. A fixing plate 11 is fixed on the second mounting post 4, and an anti-mislocking spring 12 is disposed on the fixing plate 11. One end of the anti-mislocking spring 12 is connected to the anti-mislocking plate 9. The other end is connected to the fixed plate 11. The locking wall 13 of the anti-lock plate 9 is in contact with the connecting arm 14 of the pawl 7. The two ends of the safety transition rod 10 are respectively movably mounted on the linkage plate 8 and the drive plate 6. A fixed post 15 is fixed on the housing 1. A safety spring 16 is provided between the fixed post and the drive plate. One end of the safety spring 16 is L-shaped or Z-shaped, and the other end is circular. The circular end is connected to the fixed post 15, and the L-shaped or Z-shaped end is connected to the drive plate 6. The safety spring is not limited by the space between the housing and the drive plate. The circular end of the safety spring is connected to the fixed post, and the L-shaped or Z-shaped end is connected to the drive plate. The assembly is convenient and solves the problem of spring jumping out during the process.
[0016] The present invention is further configured as follows: a waist groove 17 is provided on the drive plate 6, and one end of the safety transition rod 10 near the drive plate 6 is movably disposed in the waist groove 17; a connecting post 18 is fixed on the drive plate 6, and a first torsion spring 19 is sleeved on the connecting post 18; one end of the first torsion spring 19 is connected to the safety transition rod 10; a slot 21 is provided on the linkage plate 8, and the other end of the safety transition rod 10 is movably disposed in the slot 21; a protrusion 22 is provided at one end of the safety transition rod 10 located on the linkage plate 8 and is fixedly connected to the safety transition rod 10; the anti-mislocking plate 9 is bent upward on the side near the protrusion 22 to form an anti-mislocking block 23 integrally formed with the anti-mislocking plate 9; the anti-mislocking block 23 is correspondingly disposed with the protrusion 22; and a movable groove is provided between the locking arm of the anti-mislocking plate and the anti-mislocking block for the movement of the protrusion of the safety transition rod when the locking tongue and pawl are in the locked state.
[0017] The present invention is further configured such that: the drive assembly includes a motor disposed within the housing, a gear disk rotatably disposed within the housing, and a cam fixedly disposed on the gear disk; the gear disk is configured to cooperate with the gear shaft of the motor, and the cam is configured to abut against the drive plate.
[0018] The present invention is further configured such that: the other end of the fixing plate 11 is fixed on the third mounting post 5, the locking tongue 2 is rotatably mounted on the third mounting post 5, and a second torsion spring 27 is sleeved on the third mounting post 5. One end of the second torsion spring 27 is connected to the housing 1, and the other end is connected to the locking tongue 2, so as to facilitate the movement of the locking tongue.
[0019] The present invention is further configured such that: a swing groove 28 is provided on the drive plate 6, and the fixed column 15 is located in the swing groove 28 to limit the movement of the drive plate.
[0020] The working principle of this utility model is as follows: When the door lock is in the unlocked and open state, the pawl is away from the safety transition rod. Because the connecting arm of the pawl and the lock wall of the anti-lock plate are held together by the elastic force of the anti-lock spring, the locking arm end on the anti-lock arm is away from the safety transition rod, and the anti-lock block contacts the protrusion on the safety transition rod, so the safety transition rod cannot move to the locked position. When the latch is pushed to the closed state, the pawl rotates to a position close to the safety transition rod. The anti-lock arm rotates under the action of the anti-lock spring, and the anti-lock block does not contact the protrusion on the safety transition rod. The safety transition rod can move within the slot between the locking arm and the anti-lock block on the anti-lock plate without affecting the normal locking and unlocking operations.
[0021] Pushing the latch moves the pawl, which in turn rotates the pawl. As the pawl moves, the anti-lock plate also moves (because the connecting arm of the pawl and the lock wall of the anti-lock plate are held together by the elastic force of the anti-lock spring; at this time, the anti-lock spring is compressed, so when the pawl moves towards the safety transition rod, the anti-lock plate also moves towards the safety transition rod due to its elastic force). The anti-lock plate causes the anti-lock block to disengage from the protrusion of the safety transition rod. Then, the safety transition rod, through the elastic force of the first torsion spring, moves towards the cam. The anti-lock plate releases its restriction on the safety transition rod, achieving the locked state. At this time, the pawl and latch are in the locked state, and the door lock is in the locked state.
[0022] The above description is only a preferred embodiment of the present utility model. The present utility model is not limited to the above-described embodiments. Any modifications, alterations or equivalent substitutions made by those skilled in the art based on the above description shall fall within the scope of protection of the present utility model.
Claims
1. A safety spring and anti-mislocking structure for a vehicle door lock, comprising a housing, a latch rotatably disposed within the housing, and a first mounting post, a second mounting post, and a third mounting post fixedly disposed on the housing, characterized in that: The housing contains a drive assembly and a linkage assembly for opening the door lock. The linkage assembly includes a drive plate rotatably mounted on a first mounting post, a pawl rotatably mounted on a second mounting post from bottom to top, a linkage plate, and an anti-lock plate. The drive plate and the linkage plate are connected by a safety transition rod. A fixing plate is fixed on the second mounting post. An anti-lock spring is provided on the fixing plate. One end of the anti-lock spring is connected to the anti-lock plate, and the other end is connected to the fixing plate. The lock wall of the anti-lock plate abuts against the connecting arm of the pawl. The two ends of the safety transition rod are respectively movably mounted on the linkage plate and the drive plate. A fixing post is fixed on the drive plate. A safety spring is provided between the fixing post and the drive plate. One end of the safety spring is connected to the fixing post, and the other end is connected to the drive plate.
2. The safety spring and anti-mislock structure for a door lock of a vehicle according to claim 1, characterized in that: The drive plate has a groove, and the end of the safety transition rod near the drive plate is movably disposed in the groove. A connecting column is fixed on the drive plate, and a first torsion spring is sleeved on the connecting column. One end of the first torsion spring is connected to the safety transition rod. The linkage plate has a slot, and the other end of the safety transition rod is movably disposed in the slot. The end of the safety transition rod located on the linkage plate has a protrusion that is fixedly connected to the safety transition rod. The side of the anti-mislocking plate near the protrusion is bent upward to form an anti-mislocking block integrally formed with the anti-mislocking plate. The anti-mislocking block is correspondingly disposed to the protrusion.
3. The safety spring and anti-mislock structure for a door lock of a vehicle according to claim 2, characterized in that: The drive assembly includes a motor disposed within a housing, a gear disk rotatably disposed within the housing, and a cam fixedly disposed on the gear disk. The gear disk is configured to cooperate with the gear shaft of the motor, and the cam is configured to abut against the drive plate.
4. The safety spring and anti-mislock structure for a door lock of a vehicle according to claim 2, characterized in that: The other end of the fixing plate is fixed to the third mounting post, the locking tongue is rotatably mounted on the third mounting post, and a second torsion spring is sleeved on the third mounting post. One end of the second torsion spring is connected to the housing, and the other end is connected to the locking tongue.
5. The safety spring and anti-pinch structure for a door lock of a vehicle according to claim 4, characterized in that: The drive plate has a swing groove, and the fixed column is located in the swing groove.