Self-suction mechanism for automobile door lock and integrated automobile door lock

Abstract

The utility model provides a self-suction mechanism for an automobile door lock, which relates to the field of automobile accessories, is arranged in a lock shell and comprises a sliding seat, a screw rod matched with the sliding seat and a self-suction driving motor for driving the screw rod to rotate through a self-suction transmission component, and a spring bolt swing arm matched with the sliding seat and two spring bolt side arms are arranged on a spring bolt block. A spring bolt groove is formed by the two spring bolt side arms, the spring bolt block is connected with a first reset spring, the lock catch block is provided with a pressing swing arm and a lock catch hook arm, and the lock catch block is connected with a second reset spring. A main control module is further arranged in the lock shell and connected with the self-suction driving motor, and the main control module is further connected with a sensor. Compared with the prior art, according to the self-suction mechanism, the self-suction driving motor and the self-suction transmission assembly are arranged in the lock shell in an L shape, and the bolt swing arm and the lock hook swing arm are pushed through the screw upper sliding base to achieve locking and unlocking; in this way, the self-suction mechanism is integrated in the lock shell, the occupied space is small, conveying is stable and reliable, and the control intelligence of the door lock is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a self-absorbing mechanism for an automobile door lock and an integrated automobile door lock. Background Art

[0002] With the gradual improvement of living standards, cars have become people's daily means of transportation, and the car-using experience is currently the biggest problem that needs to be improved. When closing the door of a family car, you need to force the door lock, which not only damages the car, but also causes discomfort due to the collision noise. Many people do not want to see the doors of their beloved cars being slammed, so researchers have designed electric suction door locks. However, existing electric suction door locks usually have two or more motors for power output, and the self-priming actuator is external, which has higher requirements for the installation of the car door, increases the weight of the car door significantly, and is inconvenient to install and operate. In addition, during the self-priming process of the existing self-priming actuator, if the car door needs to be opened midway, the self-priming process must be completed first, and then unlocked. In this way, the user needs to wait for the self-priming to complete before unlocking. The user waits for a long time, which brings a bad user experience. Utility Model Content

[0003] In view of the above problems, the utility model provides a self-priming mechanism for a car door lock, which is arranged in the lock housing of the car door lock, occupies a small space, is simple and convenient to install, reduces the cost of the door lock, and improves the intelligence of the door lock control.

[0004] The technical solution adopted by this utility model is:

[0005] The latch block is provided with a pressing swing arm for pressing on the latch block and a lock hook arm cooperating with the slide seat, and the lock block is connected to the second reset spring; a main control module is also provided in the lock housing, the main control module is connected to the self-priming drive motor, and the main control module is also connected to multiple sensors.

[0006] Preferably, the sensors are divided into a half-lock sensor, a full-lock sensor, an unlock sensor and a reset sensor, and the sensors are distributed above the screw.

[0007] More preferably, the sensor is a Hall sensor, and magnets cooperating with the Hall sensor are provided in the lock tongue swing arm, the locking hook arm and the slide seat.

[0008] More preferably, the self-priming transmission assembly includes a first gear that cooperates with the worm on the self-priming drive motor, a second gear shaft seat that rotates coaxially with the first gear, a third gear that meshes with the second gear shaft seat, and a fourth gear shaft seat that meshes with the third gear. The first gear is sleeved on the second gear shaft seat, the screw and the fourth gear shaft seat rotate synchronously, the fourth gear shaft seat is sleeved on the end of the screw, and the other end of the screw is in the placement hole in the main shell.

[0009] Preferably, the self-priming drive motor and the self-priming transmission assembly are placed in an L-shape in the top of the lock shell, and the self-priming transmission assembly and the screw are arranged in an L-shape; the top part of the lock shell is provided with a placement groove for placing the self-priming drive motor and the self-priming transmission assembly, and the placement groove is arranged in an L-shape, and the placement groove includes a first placement groove for placing the self-priming drive motor in the top part of the side shell and a second placement groove for placing the self-priming transmission assembly in the top part of the main shell, the second placement groove is connected to the first placement groove, and the second placement groove is provided with a positioning shaft for positioning the second gear shaft seat and the third gear; the placement groove is also equipped with a cover plate for covering the first placement groove and the second placement groove, and the inner wall of the cover plate is provided with a positioning shaft in the second placement groove and a positioning shaft hole corresponding to the end of the screw.

[0010] More preferably, a placement seat is further provided in the lock shell, and the placement seat includes a first placement seat, a second placement seat and a placement sleeve connected in sequence, the placement sleeve is arranged in the main shell, and a screw groove for placing a screw is provided in the placement sleeve, and the screw groove is connected to a sliding groove for sliding the sliding seat, the first placement groove is arranged in the first placement seat, and the second placement groove is arranged in the second placement seat, the first placement seat and the second placement seat are L-shaped, the second placement seat and the placement sleeve are L-shaped, and the first placement seat is perpendicular to the central axis of the placement sleeve.

[0011] More preferably, the screw groove is further connected to a guide groove for guiding the slide; the slide is provided with a convex seat and a side convex ridge, the magnet is arranged in the convex seat, the convex seat cooperates with the slide groove, and the side convex ridge cooperates with the guide groove.

[0012] More preferably, an inner cavity is provided in the main shell, and the sleeve is placed in the inner cavity. The inner cavity is also divided into an outer cavity and an inner cavity by a main partition. The lock tongue block and the lock buckle block are respectively installed on the front of the main partition through the first pin shaft and the second pin shaft, and the upper slide groove of the placement sleeve is connected to the outer cavity.

[0013] Preferably, the main control module is also connected to a zipper Hall switch, and a lock rotating plate coaxial with the lock block is provided in the lock shell, a zipper magnet corresponding to the zipper Hall switch is provided on the lock rotating plate, and a zipper magnet corresponding to the zipper Hall switch is provided on the lock rotating plate.

[0014] The utility model also provides an integrated automobile door lock, comprising a lock shell, wherein a self-locking mechanism is arranged in the lock shell.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a self-priming mechanism for automobile door locks, in which a self-priming drive motor and a self-priming transmission assembly are arranged in an L-shape in the lock housing, and the driving screw rotates. The sliding seat on the screw pushes the lock tongue swing arm to rotate, so that the lock tongue block is converted from a semi-locked state to a self-locking state. When unlocking, the sliding pushes the lock hook swing arm to rotate so that the pressing swing arm on the lock hook block is separated from the lock tongue block, and the lock tongue block is automatically reset. In this way, the self-priming mechanism is integrated in the lock housing of the automobile door lock, which occupies a small space, has stable and reliable transmission, is simple and convenient to install, reduces the cost of the door lock, and improves the intelligence of the door lock control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , which is a schematic diagram of a self-closing mechanism for a car door lock provided by the present invention.

[0017] Figure 2 , which is an exploded view of a self-closing mechanism for a car door lock provided by the utility model.

[0018] Figure 3 , which is an initial schematic diagram of a self-closing mechanism for a car door lock provided by the present invention.

[0019] Figure 4 , which is a schematic diagram of a half lock of a self-closing mechanism for a car door lock provided by the utility model.

[0020] Figure 5 , which is a full lock schematic diagram of a self-closing mechanism for a car door lock provided by the utility model.

[0021] Figure 6 , which is a schematic diagram of unlocking of a self-locking mechanism for a car door lock provided by the utility model.

[0022] Figure 7 , which is an exploded view of a self-priming transmission component in a self-priming mechanism for a car door lock provided by the utility model.

[0023] Figure 8 , which is a schematic diagram of a placement seat in a self-closing mechanism for a car door lock provided by the utility model.

[0024] Figure 9, which is a schematic diagram of the interior of a lock housing in a self-closing mechanism for a car door lock provided by the utility model. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0026] Figures 1 to 9 , which is a preferred embodiment of a self-absorbing mechanism for a car door lock provided by the present invention. The self-absorbing mechanism 20 for a car door lock is arranged in a lock housing 10 of the car door lock. The lock housing 10 includes a main housing 102 and a side housing 101 arranged on one side of the main housing. The lock housing 10 is provided with a lock slot 11 for inserting a vehicle body lock hook 100; a lock tongue block 12 that cooperates with the vehicle body lock hook is installed in the main housing 10 through a first pin shaft 1201, and a lock catch block 13 for preventing the lock tongue block from rotating is installed through a second pin shaft 1301. The self-absorbing mechanism includes a slide 21 for driving the lock tongue block and the lock catch block to rotate, and a slide 21 that is connected to the slide 21 cooperates with the screw 22 and the self-priming drive motor 23 that drives the screw to rotate through the self-priming transmission assembly 24; the lock tongue block 12 is provided with a lock tongue swing arm 121 and two lock tongue side arms 122 that cooperate with the slide seat, and the two lock tongue side arms 122 form a lock tongue groove 123 that cooperates with the vehicle body lock hook, the lock tongue block 12 is connected to the first return spring 14, the lock buckle block 13 is provided with a pressing swing arm 131 for pressing on the lock tongue block and a lock buckle hook arm 132 that cooperates with the slide seat 20, and the lock buckle block is connected to the second return spring 15; The lock housing 10 is further provided with a main control module 30, which is connected to the self-priming drive motor 23. The main control module 30 is also connected to a plurality of sensors 31. According to the signal of the sensor 31, the main control module 30 controls the self-priming drive motor 23 to start. When the vehicle body lock hook 100 extends into the lock tongue groove 123 and the lock tongue block 12 is in a semi-locked state, the self-priming drive motor 23 is started, and the screw 22 is driven to rotate by the self-priming transmission assembly 24, so that the slide 21 moves along the screw 22, pushing the lock tongue swing arm 121, and the lock tongue swing arm 121 is opened. The lock tongue block 12 is converted from a semi-locked state to a fully locked state, realizing automatic closing of the vehicle door; and when unlocking, the slide 21 moves along the screw 22, pushing the lock hook arm 132, separating the pressing swing arm 131 of the lock hook block 13 from the lock tongue block 12, and the lock tongue block 12 is restored to its initial state under the action of the first return spring 14, and the vehicle body lock hook 100 is pushed out from the lock tongue groove 123 to realize electric unlocking; in this way, the self-closing mechanism 20 is integrated into the lock shell 10 of the automobile door lock, reducing the cost of the door lock and improving the intelligence of the door lock control.

[0027] The sensors 31 are divided into a half-lock sensor 3101, a full-lock sensor 3102, an unlock sensor 3103, and a reset sensor 3104. These sensors 31 are located above the screw 22. Based on the position of the bolt arm 121 and the slide 21, they send signals to the main control module 30, which controls the start, forward rotation, and reverse rotation of the pull-in drive motor 231. The sensors 31 are Hall effect sensors. Magnets 32 that mate with the Hall effect sensors are located within the bolt arm 121 and the slide 21. When the bolt arm 121 and the slide 21 are in the corresponding sensor positions, the magnets 32 act on the Hall effect element within the Hall effect sensor, generating a Hall effect voltage. This voltage is converted into an electrical signal by the signal processing circuit, thereby sending a signal to the main control module 30.

[0028] like Figure 7 As shown, the self-priming transmission assembly 24 includes a first gear 241 that cooperates with the worm 231 on the self-priming drive motor 23, a second gear shaft seat 242 that rotates coaxially with the first gear 241, a third gear 243 that meshes with the second gear shaft seat 242, a fourth gear shaft seat 244 that meshes with the third gear 243, and a sleeve seat 245 that rotates synchronously with the fourth gear shaft seat 244. The sleeve seat 245 is sleeved on the end of the screw 22, and the screw 22 rotates synchronously with the sleeve seat 245. The first gear 241 is sleeved on the second gear shaft seat 242, and the other end of the screw 22 The first gear 241 is driven by the worm 231 on the self-priming drive motor 23, and the second gear shaft seat 242 rotates synchronously with the first gear 241. The third gear 243 is engaged with the second gear shaft seat 242, driving the third gear 243 to rotate. The third gear 243 is engaged with the fourth gear shaft seat 244, and the third gear 243 drives the fourth gear shaft seat 244 to rotate. The sleeve seat 245 drives the screw rod 22 and the fourth gear shaft seat 244 to rotate synchronously, so that the slide 21 can move linearly up and down along the screw rod 22. The second gear shaft seat 242 and the fourth gear shaft seat 244 are each provided with at least one side protrusion, and the first gear 241 and the sleeve seat 245 are each provided with a side groove that cooperates with the side protrusion, so that the first gear 241 and the second gear shaft seat 242 rotate synchronously, and the fourth gear shaft seat 244 and the sleeve seat 245 rotate synchronously. The outer wall of the end of the screw rod 22 is provided with an outer flat surface, and the inner hole of the sleeve seat 245 is provided with an inner flat surface that matches the outer flat surface, so that the sleeve seat 245 drives the screw rod 22 to rotate synchronously.

[0029] The side housing 101 and the main housing 102 in the lock housing 10 form an L-shaped structure. The main housing 102 is mounted on the end side of the vehicle door, and the side housing 101 is mounted on the inner side wall of the vehicle door. The self-priming drive motor 23 and the self-priming transmission assembly 24 are arranged in an L-shape at the top of the lock housing 10. The self-priming transmission assembly 24 and the screw 22 are arranged in an L-shape. This fully utilizes the L-shaped space formed by the main housing 102 and the side housing 101 in the lock housing 10, saves space, ensures stable and reliable transmission, is simple and convenient to install, reduces door lock costs, and improves the intelligence of door lock control.

[0030] The top portion of the lock shell 10 is provided with a placement groove for placing the self-priming drive motor and the self-priming transmission assembly. The placement groove is L-shaped, and the placement groove includes a first placement groove 1011 for placing the self-priming drive motor in the top portion of the side shell 101 and a second placement groove 1021 for placing the self-priming transmission assembly in the top portion of the main shell 102. The second placement groove 1021 is connected to the first placement groove 1011, and the second placement groove 1021 is provided with a positioning shaft for positioning the second gear shaft seat 242 and the third gear 243, thereby preventing the second gear shaft seat and the third gear 243 from shifting in the second placement groove 1021. The placement groove is also equipped with a cover plate 103 for covering the first placement groove 1011 and the second placement groove 1021. The inner wall of the cover plate 103 is provided with a positioning axis in the second placement groove and a positioning axis hole corresponding to the end of the screw. In this way, the position of the self-priming transmission assembly 24 in the second placement groove 1021 is positioned to ensure that the lateral rotation of the self-priming drive motor 23 is converted into the longitudinal rotation of the screw 22.

[0031] The lock shell 10 is also provided with a placement seat 40, which includes a first placement seat 41, a second placement seat 42 and a placement sleeve 43 connected in sequence. The placement sleeve 43 is arranged in the main shell 102, and a screw groove 431 for placing the screw 22 is provided in the placement sleeve 43. The screw groove 431 is connected to a slide groove 432 for sliding the slide 21. The first placement groove 1011 is arranged in the first placement seat 41, and the second placement groove 1021 is arranged in the second placement seat 42. The first placement seat 41 and the second placement seat 42 are L-shaped, and the second placement seat 42 and the placement sleeve 43 are L-shaped. The first placement seat 41 is perpendicular to the central axis of the placement sleeve 43; in this way, the placement seat 40 is arranged in the lock shell 10, and the self-priming drive mechanism 20 is isolated from other structures in the lock shell 10, ensuring the smooth operation of the self-priming drive mechanism 20.

[0032] The screw groove 431 is also connected to a guide groove 433 for guiding the slide 21; the slide 21 is provided with a boss 211 and a side ridge 212, and the magnet 32 ​​is arranged in the boss 211, the boss 211 cooperates with the slide groove 432, and the side ridge 212 cooperates with the guide groove 433. When the slide 21 moves, the slide 21 is in the screw groove 431, the boss 211 slides in the slide groove 432, and the side ridge 212 slides in the guide groove 433. The guide groove 433 and the slide groove 432 are used to limit the slide 21 to only move in a straight line up and down.

[0033] The main shell 102 is provided with an inner cavity, and the placement sleeve 43 is placed in the inner cavity. The inner cavity is also divided into an outer cavity and an inner cavity by the main partition 1022. The lock tongue block 12 and the lock catch block 13 are respectively installed on the front of the main partition 1022 through the first pin shaft 1201 and the second pin shaft 1301. The slide groove 432 on the placement sleeve 43 is connected to the outer cavity, so that when the slide seat 21 moves in the slide groove 432, it cooperates with the lock tongue block 12 and the lock catch block 13 in the outer cavity to achieve self-priming and unlocking. The lock tongue block 12 is also provided with a lock tongue protrusion 124, which is located between the lock tongue swing arm 121 and the lock tongue side arm 122. In the initial state, the pressing swing arm 131 presses on the lock tongue protrusion 124, and in the semi-locked state, the pressing swing arm 131 is stuck between the lock tongue protrusion 124 and the lock tongue side arm 122 to prevent the lock tongue block 12 from rotating.

[0034] like Figure 9 As shown, the main control module 30 is also connected to a zipper Hall switch 33, and a lock rotating plate 16 coaxial with the lock block is further provided in the lock shell 10, and a zipper magnet 161 corresponding to the zipper Hall switch 33 is provided on the lock rotating plate 16. When the lock rotating plate 161 is affected by other structures, such as the outside door handle zipper or the inside door handle zipper, the zipper Hall switch 33 sends a signal to the main control module 30, and the main control module 30 can send a signal to the self-priming drive motor 23, and the self-priming drive motor 23 drives the screw 22 to rotate in the opposite direction to unlock; in this way, during the attraction process, if the car door needs to be opened in the middle, the attraction can be paused and unlocked, thereby reducing the user's waiting time and improving the user experience.

[0035] The specific working process of the self-locking mechanism 20 is as follows: (1) When the car door is not closed with force, the car body lock hook 100 is inserted into the lock slot 11 of the car door lock, and the door body lock hook 100 is placed in the lock tongue slot 123 to push the lock tongue side arm 122, so that the lock tongue block 12 rotates. Since the car door is not closed with force, the lock tongue block 12 can only rotate to a semi-locked state. At this time, the lock tongue swing arm 121 on the lock tongue block 12 is below the semi-locked sensor 3101; (2) The magnet 32 ​​on the lock tongue swing arm 121 acts on the Hall element inside the semi-locked sensor 3101 to generate a Hall voltage. After signal processing, The circuit is converted into an electrical signal and sent to the main control module 30, the self-sucking drive motor 23 is started, and the screw 22 is driven to rotate forward through the self-sucking transmission component 24, so that the slide 21 moves along the screw 22 toward the self-sucking transmission component 24, pushing the lock tongue swing arm 121 to move upward, driving the lock tongue block 12 to rotate, thereby driving the car door to close in the direction close to the car body, realizing the automatic suction of the car door; (3) until the lock tongue swing arm 121 rotates to the bottom of the full lock sensor 3102, the lock tongue block 12 is in the full lock state, and the magnet 32 ​​on the lock tongue swing arm 121 acts The Hall element inside the fully locked sensor 3102 generates a Hall voltage, which is converted into an electrical signal by the signal processing circuit and sent to the main control module 30. The self-locking drive motor 23 stops starting. At this time, under the action of the second return spring 14, the pressing swing arm 131 on the lock block 13 always presses on the lock tongue block 12 during the rotation of the lock tongue block 12, preventing the lock tongue block 12 from rotating and unlocking at will. When the lock tongue block 12 is in the fully locked state, the pressing swing arm 131 is stuck in the lock tongue groove 123 of the lock tongue block 12; (4) When the main control module 30 receives After the electric unlocking signal is received, the self-priming drive motor 23 is started, and the self-priming transmission assembly 24 drives the screw 22 to rotate in the opposite direction. The slide 21 moves along the screw 22 away from the self-priming transmission assembly 24, pushing the lock hook arm 132 to move downward until the slide 21 moves to the bottom of the unlocking sensor 3103. At this time, the pressing swing arm 131 of the lock block 13 is separated from the lock tongue groove 123 of the lock tongue block 12. The lock tongue block 12 returns to its initial state under the action of the first return spring 14, and the vehicle body lock hook 100 is pushed out of the lock tongue groove 123 to achieve electric unlocking.(5) When the slide 21 moves to the bottom of the unlocking sensor 3103, the magnet 32 ​​on the slide 21 acts on the Hall element inside the unlocking sensor 3103, generating a Hall voltage, which is converted into an electrical signal by the signal processing circuit and sent to the main control module 30. The self-closing drive motor 23 drives the screw 22 to rotate in the positive direction through the self-closing transmission component 24. The slide 21 moves along the screw 22 toward the self-closing transmission component 24 until the slide 21 moves to the bottom of the reset sensor 3104. The magnet 32 ​​on the slide 21 acts on the Hall element inside the reset sensor 3104, generating a Hall voltage, which is converted into an electrical signal by the signal processing circuit and sent to the main control module 30. The self-closing drive motor 23 stops rotating. At this time, the lock block 13 rotates toward the lock tongue block 12 under the action of the second reset spring 15. The pressing swing arm 131 on the lock block 13 presses on the side wall of the lock tongue block 12.

[0036] The present invention also provides an integrated automobile door lock, comprising a lock housing 10, wherein a self-locking mechanism 20 is provided within the lock housing 10. This allows the automobile door lock to have a self-locking function, thereby reducing door lock costs and improving the intelligence of door lock control. The lock housing 10 also includes an unlocking transmission mechanism, a central control actuator, an external unlocking mechanism, an internal unlocking mechanism, and a key unlocking mechanism. The unlocking transmission mechanism cooperates with the central control actuator, the external unlocking mechanism, the internal unlocking mechanism, and the key unlocking mechanism to achieve internal handle unlocking, external handle unlocking, central control unlocking, and key unlocking functions. The unlocking transmission mechanism, the central control actuator, the external unlocking mechanism, the internal unlocking mechanism, and the key unlocking mechanism are all prior art. The self-locking mechanism 20, the unlocking transmission mechanism, the central control actuator, the external unlocking mechanism, the internal unlocking mechanism, and the key unlocking mechanism are all centrally arranged within the same lock housing 10, resulting in a compact arrangement, saving space, simple installation, and convenient assembly and disassembly. The self-locking mechanism 20 is used to achieve automatic door locking, thereby improving intelligence.

[0037] In summary, the technical solution of the present utility model can fully and effectively achieve the above-mentioned purpose of the utility model, and the structure and functional principles of the present utility model have been fully verified in the embodiments and can achieve the expected efficacy and purpose. Without departing from the principle and essence of the present utility model, various changes or modifications can be made to the embodiments of the utility model. Therefore, the present utility model includes all replacement contents within the scope of the patent application, and any equivalent changes made within the scope of the patent application of the present utility model are within the scope of the patent application of this case.

Claims

1. A self-closing mechanism for a car door lock, arranged in a lock housing, the lock housing comprising a main housing and a side housing arranged on one side of the main housing, the lock housing being provided with a lock slot for inserting a vehicle body lock hook; a lock tongue block for cooperating with the vehicle body lock hook being mounted in the main housing via a first pin shaft, and a lock catch block for preventing the lock tongue block from rotating being mounted via a second pin shaft, characterized in that: The self-priming mechanism includes a slide for pushing the lock tongue block and the lock catch block to rotate, a screw cooperating with the slide, and a self-priming drive motor that drives the screw to rotate through a self-priming transmission assembly. The lock tongue block is provided with a lock tongue swing arm cooperating with the slide and two lock tongue side arms. The two lock tongue side arms form a lock tongue groove that cooperates with the vehicle body lock hook. The lock tongue block is connected to a first return spring. The lock catch block is provided with a pressing swing arm for pressing on the lock tongue block and a lock hook arm cooperating with the slide. The lock catch block is connected to a second return spring. A main control module is also provided in the lock housing. The main control module is connected to the self-priming drive motor. The main control module is also connected to a sensor for sensing the position of the lock tongue block and the slide.

2. The self-closing mechanism for a car door lock according to claim 1, characterized in that: The sensors include a half-lock sensor, a full-lock sensor, an unlock sensor and a reset sensor, and the sensors are distributed above the screw.

3. The self-closing mechanism for a car door lock according to claim 2, characterized in that: The sensor is a Hall sensor, and magnets that cooperate with the Hall sensor are provided in the lock tongue swing arm, the locking hook arm and the slide seat.

4. The self-closing mechanism for a car door lock according to claim 1, characterized in that: The self-priming transmission assembly includes a first gear that cooperates with the worm on the self-priming drive motor, a second gear shaft seat that rotates coaxially with the first gear, a third gear that meshes with the second gear shaft seat, and a fourth gear shaft seat that meshes with the third gear. The first gear is sleeved on the second gear shaft seat, the screw and the fourth gear shaft seat rotate synchronously, the fourth gear shaft seat is sleeved on the end of the screw, and the other end of the screw is located in the placement hole in the main housing.

5. The self-closing mechanism for a car door lock according to claim 4, characterized in that: The self-priming drive motor and the self-priming transmission assembly are placed in an L-shape on the top of the lock shell, and the self-priming transmission assembly and the screw are arranged in an L-shape; the top part of the lock shell is provided with a placement groove for placing the self-priming drive motor and the self-priming transmission assembly, the placement groove includes a first placement groove for placing the self-priming drive motor in the top part of the side shell and a second placement groove for placing the self-priming transmission assembly in the top part of the main shell, the second placement groove is connected to the first placement groove, and the second placement groove is provided with a positioning shaft for positioning the second gear shaft seat and the third gear; the placement groove is also equipped with a cover plate for covering the first placement groove and the second placement groove, and the inner wall of the cover plate is provided with a positioning shaft in the second placement groove and a positioning shaft hole corresponding to the end of the screw.

6. The self-closing mechanism for a car door lock according to claim 5, characterized in that: A placement seat is also provided in the lock shell, and the placement seat includes a first placement seat, a second placement seat and a placement sleeve connected in sequence. The placement sleeve is arranged in the main shell, and a screw groove for placing a screw is provided in the placement sleeve. The screw groove is connected to a sliding groove for sliding the sliding seat. The first placement groove is arranged in the first placement seat, and the second placement groove is arranged in the second placement seat. The first placement seat and the second placement seat are L-shaped, and the second placement seat and the placement sleeve are L-shaped. The first placement seat is perpendicular to the central axis of the placement sleeve.

7. The self-closing mechanism for a car door lock according to claim 6, characterized in that: The screw groove is also connected to a guide groove for guiding the slide; the slide is provided with a convex seat and a side convex ridge, the magnet is arranged in the convex seat, the convex seat cooperates with the slide groove, and the side convex ridge cooperates with the guide groove.

8. The self-closing mechanism for a car door lock according to claim 7, characterized in that: An inner cavity is provided in the main shell, and the sleeve is placed in the inner cavity. The inner cavity is also divided into an outer cavity and an inner cavity by the main partition. The lock tongue block and the lock buckle block are respectively installed on the front of the main partition through the first pin shaft and the second pin shaft. The upper slide groove of the placement sleeve is connected to the outer cavity.

9. The self-closing mechanism for a car door lock according to claim 2, characterized in that: The main control module is also connected to a zipper Hall switch, and a lock rotating plate coaxial with the lock block is provided in the lock shell, and a zipper magnet corresponding to the zipper Hall switch is provided on the lock rotating plate.

10. An integrated automobile door lock, comprising a lock housing, characterized in that: The lock housing is further provided with a self-closing mechanism as claimed in any one of claims 1 to 9.

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