Multi-mode unlocking intelligent pulling force self-suction lock with gear switching function

Abstract

The invention discloses a multi-mode unlocking and gear switching intelligent tension self-suction lock which comprises a lock shell, a large spring bolt, a small spring bolt, an unlocking plate, an outward opening assembly, a safety assembly, an inward opening assembly and a reinforcing assembly, the small spring bolt keeps the locking state of the large spring bolt, the outward opening / inward opening assembly drives the unlocking plate to drive the small spring bolt to release locking of the large spring bolt, and the large spring bolt is locked by the unlocking plate. The safety assembly locks the outward opening assembly and can be automatically unlocked or unlocked through the inward opening assembly, the reinforcing assembly achieves secondary reinforcing of a large spring bolt, the outward opening assembly is provided with a dislocation self-adaption shifting unit, the safety assembly achieves flexible unlocking through a spring floating installation worm, and the safety assembly is further provided with a spring bolt positioning plate, a positioning block and a microswitch to achieve detection and feedback of the state of the spring bolt. Multi-mode unlocking and gear switching are achieved, out-opening transmission adaptive dislocation is free of failure, safety unlocking is free of clamping stagnation, spring bolt state detection is accurate, self-absorption reinforcing locking is stable, unlocking is smooth, the overall structure is compact, and transmission is reliable.

Description

Technical Field

[0001] This invention relates to the field of automotive door lock technology, specifically to a multi-mode unlocking intelligent pull-type self-closing lock with gear shifting. Background Technology

[0002] In the field of automotive body parts, the self-closing door lock is the core component that enables automatic door closing and precise locking. The diversity of its unlocking modes, the reliability of gear switching, and the stability of self-closing lock directly affect the convenience, safety, and driving experience of the car. In particular, for different door types such as sliding doors and front doors, higher requirements are placed on the self-closing lock's multi-mode unlocking, safety locking, and emergency opening functions.

[0003] Existing automotive self-priming locks mostly use a single unlocking structure, which has poor linkage between gear shifting. External unlocking is prone to transmission failure due to assembly wear and component misalignment. Furthermore, the internal forced unlocking in the safety lock state has high transmission resistance and is prone to jamming. At the same time, the coordination between the self-priming reinforcement locking and unlocking actions is insufficient, making it difficult to balance the locking load-bearing strength and the unlocking smoothness.

[0004] An existing patent for a car self-priming lock (authorization announcement number: CN111305669A) discloses a car self-priming lock structure with a single self-priming motor and dual functions, realizing electric unlocking and locking. However, this patent does not design an outward opening transmission structure with misalignment and self-adaptation, and the transmission cooperation between the safety lock and the inward opening unlock has no buffer design, which is prone to wear of parts due to mechanical hard contact. At the same time, it lacks accurate detection and feedback of the lock tongue status, making it difficult to adapt to the needs of intelligent lock control.

[0005] In response to the shortcomings of existing automotive self-priming locks, such as limited unlocking modes, easy transmission failures, stuck unlocking mechanisms, and lack of intelligent detection, there is an urgent need to develop an intelligent pull-type self-priming lock with a compact structure, reliable transmission, multiple unlocking modes, adaptive gear switching, flexible unlocking with safety locking, and accurate detection of the lock tongue status, to meet the high security and convenience requirements of automotive doors. Summary of the Invention

[0006] The present invention aims to solve one of the technical problems existing in the prior art.

[0007] This application provides a multi-mode unlocking intelligent pull-type self-closing lock with gear switching, including a lock shell, a large bolt, a small bolt, an unlocking plate, an outward opening component, a safety component, an inward opening component, and a reinforcement component. The small bolt is used to keep the large bolt locked. Both the outward and inward opening components are used to drive the unlocking plate to move, thereby causing the small bolt to release the lock on the large bolt. The safety component is used to lock the outward opening component. The safety component can automatically release the lock on the outward opening component or be released by operating the inward opening component. The reinforcement component is used to lock or release the lock on the large bolt.

[0008] Furthermore, the outward opening assembly includes a front door cable assembly, a safety transmission block, an outward opening transmission arm, a limiting unit, and a rotating unit. Both the safety transmission block and the outward opening transmission arm are coaxially and rotatably mounted within the lock housing with the unlocking plate. The limiting unit is used to limit the swing range of the safety transmission block. The front door cable assembly is used to pull the outward opening transmission arm to perform the unlocking action. The rotating unit is movably disposed between the safety transmission block and the outward opening transmission arm, and is used to push the unlocking plate to unlock when the outward opening transmission arm performs the unlocking action, and to drive the safety transmission block to move synchronously. It also includes a safety transmission block reset torsion spring, which is used to reset the safety transmission block.

[0009] Furthermore, the limiting unit includes a safety transmission arm, a limiting groove, and a limiting block. One end of the safety transmission arm is hinged to the lock housing via a rivet shaft. The limiting groove is formed in the safety transmission arm. The limiting block slides into the limiting groove and is fixedly connected to the safety transmission block.

[0010] Furthermore, the rotating unit includes a rotating block, a rotating groove, a rotating column, and a rotating plate. The rotating plate is fixedly mounted on the unlocking plate. The middle part of the rotating block is rotatably mounted on the bottom of the outward-opening transmission arm via a rivet shaft. The rotating groove is opened in the safety transmission block. The rotating column is fixedly mounted on the bottom of one end of the rotating block. The rotating column and the rotating groove are slidably engaged. When the outward-opening transmission arm and the safety transmission block are misaligned, the rotating block is rotated and kept in contact with the rotating plate.

[0011] Furthermore, the rotating unit also includes a limiting groove and a limiting block. The limiting block is fixedly installed on the top of the other end of the rotating block, and the limiting groove is opened on the outward-opening transmission arm. The limiting groove is arc-shaped and concentric with the riveting shaft axis of the rotating block.

[0012] Furthermore, the safety assembly includes a self-priming motor, a worm gear, and a worm drive block. The worm gear and the worm drive block are rotatably mounted in the lock housing via corresponding rivet shafts. The worm gear and the worm drive block are engaged by gear transmission, and the worm gear and the self-priming motor are engaged by worm transmission. A safety lock block is fixedly installed on the worm drive block, and a safety lock groove is provided on the safety drive block for engaging with the safety lock block.

[0013] Furthermore, the inward opening assembly includes a front door inward opening start arm and an inward opening drive arm. The front door inward opening start arm and the inward opening drive arm are rotatably installed in the lock housing via corresponding rivet shafts. One end of the inward opening drive arm is connected to the front door inward opening start arm via a transmission pair, and the other end is provided with an inward opening toggle block. The inward opening toggle block is used to actuate the worm gear drive block, causing the safety drive block to disengage from the safety lock groove. The worm gear is floatingly installed on the output shaft of the self-priming motor via a spring. One end of the front door inward opening start arm is connected to the interior door handle, and the other end is used to actuate the unlocking plate to perform the unlocking action.

[0014] Furthermore, the inward opening assembly also includes an inward opening swing arm coil spring, which is sleeved on the rivet shaft corresponding to the inward opening start arm of the front door, and is used to reset the inward opening start arm of the front door after completing the unlocking action.

[0015] Furthermore, it also includes a latch positioning plate, a positioning block, and a micro switch. The two ends of the latch positioning plate are respectively fitted onto the rivet shafts corresponding to the large latch and the small latch. The latch positioning plate has a positioning flange at one end corresponding to the large latch. The positioning block is fixedly set on the large latch and is used to contact the positioning flange for positioning when the large latch is in the locked state. The micro switch is triggered by the positioning block when the large latch is unlocked.

[0016] Furthermore, the reinforcement components include a self-priming cable assembly, a reinforcement hook, a pull rod, and a pull rod spring. The reinforcement hook is fixedly mounted on the large latch, and the pull rod is hinged to the lock housing. When the large latch is in the locked state, the reinforcement hook is located in the hook-lock position of the pull rod. The self-priming cable assembly is used to pull the pull rod to hook and lock it with the reinforcement hook. The pull rod spring is used to push the pull rod away from the reinforcement hook when the self-priming cable assembly is unloaded.

[0017] This application also discloses an intelligent control method for a car door intelligent pull-type self-closing lock, including the following steps: Step 1: After the door receives the closing signal, the self-priming motor starts and drives the self-priming cable assembly to drive the door into the self-priming closing process. During this process, the latch position switch detects the real-time position signal of the large latch and transmits it to the control circuit board. At the same time, the control circuit board continuously collects two types of real-time operating status parameters of the self-priming motor: the self-priming motor drive current and the self-priming motor speed. Step 2: The control circuit board determines the current self-closing stage of the door based on the received real-time position signal of the large latch. The closing stage includes at least a half-lock stage and a full-lock stage. Step 3: The control circuit board compares the real-time operating status parameters of the self-priming motor collected with the pre-stored operating reference parameters of the self-priming motor for the corresponding half-lock / full-lock stages in real time to determine the resistance status of the door seal strip. If the drive current of the self-priming motor in the current closed phase exceeds the preset current reference value for the corresponding phase, and the speed is simultaneously lower than the preset speed reference value for the corresponding phase, it is determined to be a high resistance state of the door seal strip. If the drive current of the self-priming motor in the current closed phase is lower than the preset current reference value for the corresponding phase, and the speed is simultaneously higher than the preset speed reference value for the corresponding phase, it is determined to be the normal resistance state of the door seal strip. Step 4: Based on the dual determination results of the current closing stage of the door and the resistance status of the sealing strip, the control circuit board dynamically adjusts the drive current of the self-closing motor to regulate the output torque of the self-closing motor, adapting to the sealing strip resistance to complete the self-closing process. If the sealing strip is determined to be in a high resistance state, the control circuit board immediately increases the drive current of the self-priming motor and increases the output torque of the self-priming motor to ensure that the sealing strip resistance is overcome and the door can be smoothly self-primed to the corresponding stage. If the sealing strip is determined to be in a normal resistance state, the control circuit board maintains the normal drive current of the self-priming motor and maintains the normal output torque of the self-priming motor to avoid excessive force when closing the door due to excessive torque, and wear on the lock body or body parts. Step 5: During the entire process of the self-closing of the door driven by the self-closing motor from the half-lock stage to the fully-lock stage, the control circuit board continuously monitors the instantaneous changes in the operating status parameters of the self-closing motor. If the self-closing motor drive current is detected to suddenly increase beyond the preset anti-pinch current threshold, and the self-closing motor speed is simultaneously lower than the preset anti-pinch speed threshold, and the duration of this abnormal operating state reaches the preset anti-pinch time threshold, it is immediately determined that a foreign object is trapped in the door during the self-closing process, and the anti-pinch protection process is triggered. Step Six: After the anti-pinch protection process is triggered, the control circuit board immediately cuts off the positive drive power supply to the self-priming motor, controls the self-priming motor to stop rotating to release the door clamping force and prevent pinching or damage to components; after the self-priming motor stops rotating for a preset time, the control circuit board readjusts the self-priming motor torque strategy according to the previously determined sealing strip resistance status and attempts to drive the door to self-prime close again. If the number of self-priming attempts reaches the preset retry threshold and the door still does not complete full lock closure, the self-priming motor is controlled to stop all self-priming actions and a fault feedback signal is output to the vehicle control system. Step 7: When the latch position switch detects that the large latch has moved to the fully locked position, it immediately sends a signal to the control circuit board that the large latch is fully locked. After receiving the signal, the control circuit board immediately controls the self-closing motor to stop working. This door self-closing intelligent control process ends, and all components are reset to their initial state, waiting for the next entry and exit signal.

[0018] The beneficial effects of this invention are as follows: 1. Through the cooperation of the lock shell, large lock tongue, small lock tongue, unlocking plate, outward opening component, safety component, and inward opening component, multiple unlocking modes such as outward opening unlocking, forced inward opening unlocking, and automatic release of the safety lock can be achieved. The safety component can accurately lock the outward opening component, and the inward opening component can forcibly release the safety lock, effectively improving the safety and convenience of car door use and adapting to the unlocking needs of different driving and riding scenarios.

[0019] 2. By cooperating with the toggle block, toggle groove, limiting groove, and limiting block in the toggle unit of the outward opening assembly, and utilizing the adaptive structure of the concentric and coaxial sections of the toggle groove, flexible transmission is achieved after the outward opening transmission arm and the safety transmission block are misaligned. This avoids unlocking failure caused by assembly wear or component misalignment. At the same time, the limiting groove precisely constrains the rotation angle of the toggle block, improving the transmission reliability and accuracy of the outward opening unlocking.

[0020] 3. Through the cooperation of the self-priming motor, worm gear and worm drive block, worm and spring in the safety component, the spring enables the worm to be floating. When the lock is forcibly unlocked from the inside, the axial movement of the worm absorbs the transmission resistance, avoiding hard contact wear between the worm gear and worm and the worm drive block, thus achieving flexible unlocking of the safety lock, reducing the risk of component jamming and extending the service life of the lock body.

[0021] 4. Through the cooperation of the latch positioning plate, positioning block, and micro switch, the mechanical positioning and electronic signal feedback of the large latch locking / unlocking state are realized, providing a reliable state basis for intelligent pull self-priming, avoiding malfunction of the lock body. At the same time, the mechanical positioning improves the stability of the large latch locking and prevents the latch from loosening during vehicle operation.

[0022] 5. Through the cooperation of the self-closing cable assembly, the reinforced lock hook, the pull rod, and the pull rod spring in the reinforcement component, a secondary reinforcement locking is achieved after locking on the large lock tongue, which improves the load-bearing strength of the lock body in the fully locked state. The pull rod spring realizes the automatic reset of the reinforcement unlocking, so that the reinforcement locking and unlocking actions are highly coordinated, taking into account both the stability of the self-closing and the smoothness of unlocking.

[0023] 6. By linking the latch position switch with the control circuit board, the latch position signal and motor operating parameters are collected in real time to accurately determine the resistance state of the door seal. The output torque of the self-closing motor is dynamically adjusted according to the half-lock / full-lock stage and the resistance state. This effectively solves the problems of difficult self-closing of the door in low temperature and high resistance scenarios and excessive force when closing the door in normal temperature / high temperature scenarios. It ensures smooth self-closing and avoids wear and tear on the lock body and body parts, further extending the service life of the lock body and related door components. Attached Figure Description

[0024] Figure 1 This is a perspective view of a multi-mode unlocking intelligent pull-type self-closing lock with gear switching, as described in this application embodiment. Figure 2 This is a perspective view of a multi-mode unlocking intelligent pull-type self-closing lock with gear switching, as described in this application embodiment. Figure 3 This is a perspective view of the large latch, small latch, and lever in the embodiments of this application; Figure 4 This is a perspective view of the large latch, small latch, and lever in the embodiments of this application; Figure 5 This is a perspective view of the unlocking plate, safety component, inner opening component, and outer opening component in the embodiments of this application; Figure 6 This is a perspective view of the worm gear according to an embodiment of this application; Figure 7 This is a perspective view of the unlocking plate, safety component, inner opening component, and outer opening component in the embodiments of this application; Figure 8This is a perspective view of the insurance component and the inner opening component in the embodiments of this application; Figure 9 This is a perspective view of the outward-opening component and the inward-opening component in the embodiments of this application; Figure 10 This is an exploded view of the externally opened component and the internally opened component in the embodiments of this application; Figure 11 This is an exploded view of the external and internal opening components in the embodiments of this application.

[0025] Figure Labels 1-Lock housing, 2-Large bolt, 3-Small bolt, 4-Unlocking plate, 5-Outward opening assembly, 51-Front door cable assembly, 52-Safety transmission block, 53-Outward opening transmission arm, 54-Limit unit, 541-Safety transmission arm, 542-Limit groove, 543-Limit block, 55-Turn unit, 551-Turn block, 552-Turn groove, 5521-Concentric section, 5522-Coaxial section, 553-Turn column, 554-Turn plate, 555-Limit groove, 556-Limit block, 56-Safety transmission block return torsion spring, 6-Safety assembly, 61-Self-priming motor, 62-Worm gear, 63-Worm gear drive block, 65-Worm gear, 66-Safety lock block, 67-Safety lock groove, 68-Outward opening drive block, 69-Ball head rod, 610-Outward opening drive rod, 611-Outward opening drive arm, 7-Inward opening assembly, 71-Front door inward opening start arm, 72-Inward opening drive arm, 73-Inward opening toggle block, 74-Inward opening rotating arm coil spring, 8-Reinforcement assembly, 81-Self-priming cable assembly, 82-Reinforcement lock hook, 83-Pull rod, 84-Pull rod spring, 9-Large latch torsion spring, 10-Small latch torsion spring, 11-Latch positioning plate, 12-Positioning block, 13-Micro switch, 14-Positioning flange. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] The following description, in conjunction with the accompanying drawings, details the multi-mode unlocking intelligent pull-type self-closing lock with gear shifting provided in this application through specific embodiments and application scenarios.

[0029] Example 1: This application provides a multi-mode unlocking intelligent pull-type self-closing lock with gear switching, including a lock shell 1, a large bolt 2, a small bolt 3, an unlocking plate 4, an outward opening component 5, a safety component 6, an inward opening component 7, and a reinforcing component 8. The small bolt 3 is used to keep the large bolt 2 locked. Both the outward opening component 5 and the inward opening component 7 are used to drive the unlocking plate 4 to move, so as to drive the small bolt 3 to release the lock on the large bolt 2. The safety component 6 is used to lock the outward opening component 5. The locking state of the safety component 6 on the outward opening component 5 can be automatically released, or released by operating the inward opening component 7. The reinforcing component 8 is used to lock or release the locked state of the large bolt 2.

[0030] In this embodiment of the application, the small latch 3 and the large latch 2 are rotatably mounted in the lock housing 1 through corresponding rivet shafts. It also includes a large latch torsion spring 9 and a small latch torsion spring 10. The large latch torsion spring 9 is used to release the large latch 2 from the locked state after the small latch 3 releases the lock on the large latch 2. At this time, the small latch torsion spring 10 elastically deforms and stores elastic potential energy.

[0031] like Figures 1 to 4As shown, due to the aforementioned structure, during the unlocking action, pulling the outer door handle can trigger the outward opening component 5, or pulling the inner door handle can trigger the inward opening component 7. If the safety component 6 is in a locked state, the movement of the outward opening component 5 will be directly restricted. Only the inward opening component 7 can trigger the unlocking, or the outer opening component 5 will only take effect after the safety lock is automatically released. Subsequently, the inward opening component 7 (when the safety lock is locked) / the outer opening component 5 (after the safety lock is released) receive the unlocking power and directly drive the unlocking plate 4 to rotate around the rivet shaft. When the unlocking plate 4 rotates, its transmission end pushes the small latch 3 to rotate around its own rivet shaft, causing the small latch 3 to disengage from the engagement position with the large latch 2, completely releasing the locking constraint on the large latch 2. After the small latch 3 is unlocked, the large latch torsion spring 9 releases its pre-stored elastic potential energy, driving the large latch 2 to rotate around its own rivet shaft and reset from the locked position to the unlocked position, thus opening the door. During the process of the small latch 3 being pushed... The small latch torsion spring 10 undergoes elastic deformation and stores potential energy as it rotates. After the unlocking action is completed, the unlocking plate 4 returns to its original position along with the outward opening component 5 / inward opening component 7. The small latch torsion spring 10 releases its stored energy, driving the small latch 3 to return to its initial locking position in preparation for the next locking action. If the reinforcing component 8 is in the locking state of the large latch 2, it will complete the unlocking action before the small latch 3 is unlocked. After the large latch 2 is unlocked, the reinforcing component 8 returns to its initial state synchronously. During the locking action, the door closes, causing the body latch to push the large latch 2 to rotate around the rivet shaft. The large latch torsion spring 9 is compressed and stores elastic potential energy. When the large latch 2 rotates to the preset locking position, the small latch 3 returns to its original position under the elastic force of the small latch torsion spring 10 and engages in the meshing groove of the large latch 2, thus completing the basic locking of the large latch 2. After the basic locking, the reinforcing component 8 can simultaneously perform a secondary reinforcement locking of the large latch 2, improving the load-bearing strength of the lock body.

[0032] Example 2: In this embodiment, in addition to the structural features of the aforementioned embodiments, the outward opening component 5 includes a front door pull cable assembly 51, a safety transmission block 52, an outward opening transmission arm 53, a limiting unit 54, and a turning unit 55. The safety transmission block 52 and the outward opening transmission arm 53 are both coaxially and rotatably mounted in the lock housing 1 with the unlocking plate 4. The limiting unit 54 is used to limit the swing range of the safety transmission block 52. The front door pull cable assembly 51 is used to pull the outward opening transmission arm 53 to perform the unlocking action. The turning unit 55 is movably disposed between the safety transmission block 52 and the outward opening transmission arm 53, and is used to push the unlocking plate 4 to unlock when the outward opening transmission arm 53 performs the unlocking action, and drive the safety transmission block 52 to move synchronously. It also includes a safety transmission block reset torsion spring 56, which is used to reset the safety transmission block 52.

[0033] In this embodiment of the application, the limiting unit 54 includes a safety transmission arm 541, a limiting groove 542, and a limiting block 543. One end of the safety transmission arm 541 is hinged to the lock housing 1 via a rivet shaft. The limiting groove 542 is formed in the safety transmission arm 541. The limiting block 543 slides with the limiting groove 542 and is fixedly connected to the safety transmission block 52.

[0034] like Figure 5 , Figure 7 , Figures 9 to 11 As shown, due to the aforementioned structure, during the outward unlocking action, pulling the outer door handle actuates the front door cable assembly 51. The front door cable assembly 51 pulls the outward opening transmission arm 53 to rotate around the rivet shaft, performing the initial unlocking action. As the outward opening transmission arm 53 rotates, its bottom rotating unit 55 is activated, pushing the unlocking plate 4 to rotate around the rivet shaft while simultaneously causing the safety transmission block 52 to swing synchronously around the coaxial rivet shaft. During the swinging process of the safety transmission block 52, its bottom limiting block 543 slides along the limiting groove 542 on the safety transmission arm 541. The limiting unit 54 precisely limits the swing range of the safety transmission block 52 to prevent overtravel and jamming. After the unlocking plate 4 rotates... The small latch 3 is disengaged from the large latch 2. Subsequently, the large latch torsion spring 9 drives the large latch 2 to unlock, and the small latch torsion spring 10 stores energy to reset, which is the same as in Example 1. After the unlocking action is completed, the reset torsion spring 56 of the safety transmission block releases its elastic potential energy, drives the safety transmission block 52 to slide along the limiting groove 542 and reset to the initial position, and the entire external opening component 5 is reset. If the safety component 6 is in the locked state, the safety transmission block 52 is locked and cannot swing. The toggle unit 55 cannot push the unlocking plate 4 to move. The action of the front door cable assembly 51 pulling the external opening transmission arm 53 only rotates in vain and cannot trigger unlocking, thus realizing the locking restriction of the external opening component 5.

[0035] Example 3: In this embodiment, in addition to the structural features of the aforementioned embodiments, the rotating unit 55 includes a rotating block 551, a rotating groove 552, a rotating column 553, and a rotating plate 554. The rotating plate 554 is fixedly mounted on the unlocking plate 4. The middle part of the rotating block 551 is rotatably mounted on the bottom of the outward-opening transmission arm 53 via a riveting shaft. The rotating groove 552 is opened in the safety transmission block 52. The rotating column 553 is fixedly mounted on the bottom of one end of the rotating block 551. The rotating column 553 and the rotating groove 552 are slidably engaged, which is used to rotate the rotating block 551 and keep it in contact with the rotating plate 554 when the outward-opening transmission arm 53 and the safety transmission block 52 are misaligned.

[0036] In this embodiment of the application, the rotating unit 55 further includes a limiting groove 555 and a limiting block 556. The limiting block 556 is fixedly disposed on the top of the other end of the rotating block 551. The limiting groove 555 is opened in the outward transmission arm 53. The limiting groove 555 is arc-shaped and concentric with the riveting shaft axis of the rotating block 551. The rotating groove 552 includes a concentric section 5521 and a coaxial section 5522.

[0037] like Figure 5 , Figure 7 , Figures 9 to 11 As shown, due to the aforementioned structure, during the outward unlocking action, pulling the outer door handle drives the front door cable assembly 51, which in turn pulls the outward opening drive arm 53 to rotate around the rivet shaft. The bottom of the outward opening drive arm 53 drives the rotating block 551 to rotate synchronously around its own rivet shaft. When the rotating block 551 rotates, the rotating pin 553 at one end of its bottom slides along the rotating groove 552 on the safety drive block 52. The concentric section 5521 of the rotating groove 552 and the limiting groove 555 on the outward opening drive arm 53 are both arc-shaped and are aligned with the rotating pin. The riveting shafts of the rotating block 551 are concentric. When the outward-opening transmission arm 53 and the safety transmission block 52 are misaligned, the rotating pin 553 moves from the coaxial section 5522 of the rotating groove 552 into the concentric section 5521. At this time, the rotating block 551 immediately flips over. Simultaneously, the limiting block 556 at the top of the other end of the rotating block 551 slides along the limiting groove 555 to the other end of the limiting groove 555 and abuts against it, so that the rotating block 551 is stably maintained in this flipped state until the rotating pin 553 moves to the concentric section 5521 away from the coaxial section 5522. At one end, the outward-opening transmission arm 53 continues to rotate around the rivet shaft, which drives the safety transmission block 52 to rotate synchronously until the rotating block 551, which is in a flipped state, contacts the rotating plate 554 fixed on the unlocking plate 4 and causes the unlocking plate 4 to rotate around the rivet shaft, triggering the subsequent unlocking action. Throughout the process, the limiting block 556 always slides along the arc-shaped limiting groove 555 concentric with the rivet shaft axis of the rotating block 551, precisely limiting the rotation angle of the rotating block 551 to avoid transmission failure caused by excessive rotation. The unlocking plate 4 pushes the small locking tongue 3 to release. After the large latch 2 is locked, the unlocking and resetting actions of the large latch 2 and the small latch 3, as well as the resetting action of the safety transmission block 52, are consistent with those in Embodiment 2. Through the structural design of the concentric section 5521 and the coaxial section 5522 of the rotary groove 552, and the coordination constraint of the limiting block 556 and the limiting groove 555, even if the outward opening transmission arm 53 and the safety transmission block 52 are misaligned due to assembly or wear, the rotary unit 55 can still maintain a contactable state with the rotary plate 554 through adaptive flipping, ensuring the accuracy and reliability of the outward opening unlocking action.

[0038] Example 4: In this embodiment, in addition to the structural features of the aforementioned embodiments, the safety component 6 includes a self-priming motor 61, a worm gear 62, and a worm drive block 63. The worm gear 62 and the worm drive block 63 are rotatably mounted in the lock housing 1 via corresponding riveting shafts. The worm gear 62 and the worm drive block 63 are gear-driven, and the worm gear 62 and the self-priming motor 61 are driven by a worm 65. A safety lock block 66 is fixedly provided on the worm drive block 63, and a safety lock groove 67 for engaging with the safety lock block 66 is provided on the safety drive block 52.

[0039] In this embodiment of the application, the inward opening assembly 7 includes a front door inward opening start arm 71 and an inward opening transmission arm 72. The front door inward opening start arm 71 and the inward opening transmission arm 72 are respectively rotatably installed in the lock housing 1 through corresponding rivet shafts. One end of the inward opening transmission arm 72 is connected to the front door inward opening start arm 71 through a transmission pair, and the other end is provided with an inward opening toggle block 73. The inward opening toggle block 73 is used to aggle the worm gear transmission block 63, so that the safety transmission block 52 is disengaged from the safety lock groove 67. The worm gear 65 is floatingly installed on the output shaft of the self-priming motor 61 through a spring. One end of the front door inward opening start arm 71 is connected to the door handle, and the other end is used to aggle the unlocking plate 4 to perform the unlocking action.

[0040] In this embodiment of the application, the inner opening component 7 also includes an inner opening rotating arm coil spring 74, which is sleeved on the rivet shaft corresponding to the front door inner opening start arm 71, and is used to reset the front door inner opening start arm 71 after the unlocking action is completed.

[0041] In this embodiment of the application, it also includes an externally opening transmission block 68, a ball joint rod 69, an externally opening transmission rod 610, and an externally opening drive arm 611. The externally opening transmission block 68 is fixedly mounted on the worm gear transmission block 63. One end of the ball joint rod 69 is fixedly connected to the externally opening transmission block 68. The middle part of the externally opening transmission rod 610 is rotatably mounted in the lock housing 1 through a corresponding pin. One end of the rod is connected to the ball end of the ball joint rod 69 through a transmission groove. One end of the externally opening drive arm 611 is fixedly connected to the end of the externally opening transmission block 68 away from the ball joint rod 69 and extends out of the lock housing 1.

[0042] like Figures 5 to 11As shown, due to the aforementioned structure, when the safety locking action is activated, the self-priming motor 61 starts upon receiving the locking / safety locking command. Its output shaft drives the worm gear 65 to rotate. The worm gear 65 meshes with the worm wheel 62, driving the worm wheel 62 to rotate around the riveting shaft. The worm wheel 62 meshes with the gear of the worm gear transmission block 63, driving the worm gear 63 to rotate around the riveting shaft. Simultaneously, the worm gear transmission block 63 drives the outward-opening transmission block 68, the ball joint rod 69, and the outward-opening drive arm 611 to reset to the locking position. At the same time, the safety lock block 66 on the worm gear transmission block 63 rotates to the preset position and engages with the safety lock groove 67 on the safety transmission block 52, thereby locking the safety transmission block 52. The external door handle stops the locking mechanism, preventing the safety transmission block 52 from swinging and thus restricting the unlocking action of the external opening component 5, completing the safety locking. At this time, the external mechanical lock of the door is in the locked state, and pulling the external door handle cannot trigger unlocking. During the forced unlocking action of the internal door opening, pulling the internal door handle causes the front door internal opening start arm 71 connected to the internal handle to rotate around the rivet shaft. When the front door internal opening start arm 71 rotates, it drives the internal opening transmission arm 72 to rotate around the rivet shaft through the transmission pair. The internal opening actuating block 73 at the other end of the internal opening transmission arm 72 rotates with it and actuates the worm gear transmission block 63 to rotate in the opposite direction around the rivet shaft. The reverse rotation of the worm gear transmission block 63 causes the worm wheel 62 to rotate under the action of gear transmission. The worm wheel 62 rotates and pushes the worm 65 along the rivet shaft. The output shaft of the self-priming motor 61 moves, compressing the spring and allowing the inward-opening actuating block 73 to smoothly push the worm gear transmission block 63. The worm gear transmission block 63 rotates in the opposite direction, simultaneously driving the outward-opening transmission block 68 and the ball joint rod 69 in linkage. The ball end of the ball joint rod 69 slides along the transmission groove of the outward-opening transmission rod 610, causing the outward-opening transmission rod 610 to rotate around the pin shaft. Ultimately, the safety lock block 66 on the worm gear transmission block 63 disengages from the safety lock groove 67 on the safety transmission block 52, releasing the lock on the safety transmission block 52 and eliminating the restriction on the outward-opening assembly 5. At the same time, during the rotation of the inward-opening front door start arm 71, its transmission end directly actuates the unlocking plate 4 to rotate around the rivet shaft, triggering the movement. Following the action of the small latch 3 disengaging from the large latch 2 and the large latch torsion spring 10 driving the large latch 2 to unlock, this part of the action is the same as in embodiment 1, realizing forced unlocking from inside the vehicle. After the unlocking action is completed, the inner opening rotating arm coil spring 74, which is sleeved on the rivet shaft of the inner opening start arm 71 of the front door, releases its elastic potential energy, driving the inner opening start arm 71 and the inner opening transmission arm 72 of the front door to return to their initial positions in sequence. The compressed spring also releases its elastic potential energy to push the worm gear 65 to return to its initial position along the output shaft axis of the self-priming motor 61. The worm gear transmission block 63 returns to its initial position simultaneously and drives the outer opening transmission block 68, ball joint rod 69, outer opening transmission rod 610 and outer opening drive arm 611 to return to their initial state, preparing for the next action.When the safety lock automatically disengages, upon receiving unlocking commands such as remote unlocking or central locking from inside the vehicle, the self-priming motor 61 starts in reverse. Through the reverse transmission of "worm gear 65 → worm wheel 62 → worm gear drive block 63," it drives the safety lock block 66 to disengage from the safety lock slot 67. Simultaneously, the worm gear drive block 63 drives the outward opening drive block 68, ball joint rod 69, outward opening drive rod 610, and outward opening drive arm 611 in a coordinated manner, unlocking the external mechanical lock of the door and automatically disengaging the safety lock, thus restoring the outward opening component 5 to its normal unlocking function. Pulling the exterior door handle unlocks the door; however, when the vehicle loses power or the electronic unlocking fails, the mechanical key on the outside of the door, in conjunction with the corresponding mechanical lock, drives the outward opening drive arm 611, causing the outward opening transmission rod 610 to rotate the worm gear transmission block 63 around the rivet shaft. Simultaneously, the safety lock block 66 disengages from the safety lock groove 67, and the outward opening transmission block 68 and ball joint rod 69 work together to unlock the exterior mechanical lock, releasing the locking restriction of the outward opening assembly 5. Pulling the exterior door handle then completes the mechanical unlocking, suitable for emergency outward opening unlocking scenarios.

[0043] Example 5: In this embodiment, in addition to the structural features of the aforementioned embodiments, it also includes a latch positioning plate 11, a positioning block 12, and a micro switch 13. The two ends of the latch positioning plate 11 are respectively sleeved on the rivet shafts corresponding to the large latch 2 and the small latch 3. The latch positioning plate 11 has a positioning flange 14 at one end corresponding to the large latch 2. The positioning block 12 is fixedly set on the large latch 2 and is used to contact and position with the positioning flange 14 when the large latch 2 is in the locked state. The micro switch 13 is triggered by the positioning block 12 when the large latch 2 is unlocked.

[0044] like Figure 3 and Figure 4As shown, due to the aforementioned structure, during the locking state positioning and detection, when the car door is closed and locked, the large latch 2 rotates to the locking position. The positioning block 12 on the large latch 2 rotates synchronously to the preset position. The latch positioning plate 11, which is sleeved on the rivet shafts of the large latch 2 and the small latch 3, has its corresponding positioning flange 14 of the large latch 2 in close contact with the positioning block 12, mechanically positioning the locking position of the large latch 2 to prevent the large latch 2 from loosening and improve locking stability. At this time, the positioning block 12 does not contact the micro switch 13, and the micro switch 13 remains in its initial on / off state, feeding back a signal to the lock body control module that the car door is locked. During the unlocking state triggering and signal feedback, after the unlocking action is triggered, the large latch 2 is driven by the large latch torsion spring 9. When the large latch 2 rotates around the rivet shaft to unlock, the positioning block 12 on the large latch 2 rotates synchronously with it. When the positioning block 12 rotates to the preset angle, it directly triggers the micro switch 13, changing the on / off state of the micro switch 13 and sending a signal to the lock body control module that the door has been unlocked. When the large latch 2 unlocks and rotates, the positioning block 12 pushes the positioning flange 14, causing the latch positioning plate 11 to move slightly around the rivet shaft. After unlocking, the large latch 2 resets, and the latch positioning plate 11 resets synchronously with the positioning block 12 to the initial positioning state. Through the dual method of mechanical positioning and electronic signal feedback, the locking / unlocking state of the large latch 2 is accurately detected, providing a reliable state basis for the electronic control logic of intelligent pull self-priming and multi-mode unlocking, and avoiding lock body malfunctions.

[0045] Example 6: In this embodiment, in addition to the structural features of the aforementioned embodiments, the reinforcement component 8 includes a self-closing cable assembly 81, a reinforcement hook 82, a pull rod 83, and a pull rod spring 84. The reinforcement hook 82 is fixedly mounted on the large latch 2, and the pull rod 83 is hinged to the lock housing 1. When the large latch 2 is in the locked state, the reinforcement hook 82 is located at the hook-lock position of the pull rod 83. The self-closing cable assembly 81 is used to pull the pull rod 83 to hook and lock it with the reinforcement hook 82. The pull rod spring 84 is used to push the pull rod 83 away from the reinforcement hook 82 when the self-closing cable assembly 81 is unloaded.

[0046] like Figure 3As shown, due to the aforementioned structure, after the door is closed and locked (the large latch 2 is locked by the small latch 3), the reinforcing hook 82 on the large latch 2 is in the hook-lock position of the pull rod 83. Upon receiving a signal, the self-closing cable assembly 81 activates and pulls the pull rod 83 to rotate around the hinge point, thus securing the pull rod 83 with the reinforcing hook 82. This achieves secondary reinforcement and locking of the large latch 2, increasing its load-bearing strength in the fully locked state and completing the intelligent self-closing reinforcement action. During the reinforcement and unlocking action, after the unlocking command is triggered, the self-closing cable assembly 81 first releases force, and the sleeved pull rod spring 84 releases its elastic potential energy and pushes the pull rod 83 to rotate in the opposite direction around the hinge point, causing the pull rod 83 to disengage from the reinforcement. The hook-lock engagement of the hook 82 releases the reinforced lock on the large latch 2. Subsequently, the unlocking plate 4 is driven, triggering the small latch 3 to release the large latch 2 and the large latch torsion spring 9 to drive the large latch 2 to unlock. This part of the action is consistent with that in Embodiment 1. When the car door is closed again to lock, the self-closing cable assembly 81 is in a de-stressed state. The pull rod 83 is reset to the initial hook-lock waiting position under the action of the pull rod spring 84. After the large latch 2 completes basic locking, the self-closing cable assembly 81 can be activated again to pull the pull rod 83 to engage with the reinforced lock hook 82, completing a new round of reinforced locking. This achieves the coordinated cooperation between the reinforced component 8 and the self-closing cable assembly 81, ensuring the stability of the lock body's self-closing and the smoothness of unlocking.

[0047] Example 7: In this embodiment, an intelligent control method for a car door intelligent pull-type self-closing lock is disclosed, which is applied to the aforementioned multi-mode unlocking intelligent pull-type self-closing lock with gear switching. The intelligent pull-type self-closing lock is equipped with a bolt position switch, a self-closing motor, and a control circuit board with control circuitry, and includes the following steps: Step 1: After the door receives the closing signal, the self-priming motor starts and drives the self-priming cable assembly to drive the door into the self-priming closing process. During this process, the latch position switch detects the real-time position signal of the large latch and transmits it to the control circuit board. At the same time, the control circuit board continuously collects two types of real-time operating status parameters of the self-priming motor: motor drive current and motor speed. Step 2: The control circuit board determines the current self-closing stage of the door based on the received real-time position signal of the large latch. The closing stage includes at least a half-lock stage and a full-lock stage. Step 3: The control circuit board compares the real-time operating status parameters of the collected motor with the pre-stored motor operating reference parameters for the corresponding half-lock / full-lock stages in real time to determine the resistance status of the door seal strip. If the drive current of the motor in the current off phase exceeds the preset current reference value for the corresponding phase, and the speed is simultaneously lower than the preset speed reference value for the corresponding phase, it is determined to be a high resistance state of the door seal strip. If the drive current of the motor in the current off phase is lower than the preset current reference value for the corresponding phase, and the speed is simultaneously higher than the preset speed reference value for the corresponding phase, it is determined to be the normal resistance state of the door seal strip. Step 4: Based on the dual determination results of the current closing stage of the door and the resistance status of the sealing strip, the control circuit board dynamically adjusts the drive current of the self-closing motor to regulate the motor output torque, adapting to the sealing strip resistance to complete the self-closing process. If the sealing strip is determined to be in a high resistance state, the control circuit board immediately increases the drive current of the self-priming motor, increases the motor output torque, and ensures that the sealing strip resistance is overcome so that the door can be smoothly self-primed to the corresponding stage; If the sealing strip is determined to be in a normal resistance state, the control circuit board maintains the normal drive current of the self-priming motor and maintains the normal output torque of the motor to avoid excessive force when closing the door due to excessive torque, and wear on the lock body or body parts. Step 5: During the entire process of the self-closing of the door driven by the self-closing motor from the half-lock stage to the fully-lock stage, the control circuit board continuously monitors the instantaneous changes in the motor's operating status parameters. If it detects that the motor drive current suddenly increases beyond the preset anti-pinch current threshold and the motor speed is simultaneously lower than the preset anti-pinch speed threshold, and the duration of this abnormal operating state reaches the preset anti-pinch time threshold, it is immediately determined that a foreign object is trapped in the door during the self-closing process, and the anti-pinch protection process is triggered. Step Six: After the anti-pinch protection process is triggered, the control circuit board immediately cuts off the positive drive power supply to the self-priming motor, controls the motor to stop rotating to release the door clamping force and prevent pinching or damage to components; after the motor stops for a preset time, the control circuit board readjusts the motor torque strategy based on the previously determined sealing strip resistance status and attempts to drive the door to self-prime close again. If the number of self-priming attempts reaches the preset retry threshold and the door still fails to fully lock and close, the control motor stops all self-priming actions and outputs a fault feedback signal to the vehicle control system. Step 7: When the latch position switch detects that the large latch has moved to the fully locked position, it immediately sends a signal to the control circuit board that the large latch is fully locked. After receiving the signal, the control circuit board immediately controls the self-closing motor to stop working. This door self-closing intelligent control process ends, and all components are reset to their initial state, waiting for the next entry and exit signal.

[0048] Furthermore, the door entry / closing signal in step one can be one or more of the following: a mechanical sensing signal triggered by the contact between the door and the vehicle body, an electric control signal issued by the vehicle's central control system, or a linkage signal triggered by the operation of the door handle.

[0049] In the further step one, the latch position switch is a mechanical contact switch or a Hall position sensor that is linked to the large latch, and the real-time position signal is an electrical switch on / off signal or a Hall position sensing signal.

[0050] The motor operating reference parameters in the further step three are the motor drive current reference value and motor speed reference value corresponding to the half-lock stage and the full-lock stage. The reference parameters are pre-stored in the storage module of the control circuit board and can be updated according to the working conditions of the lock body.

[0051] The instantaneous changes in the motor operating status parameters in step five are caused by the control circuit board detecting sudden changes in the motor drive current and speed within a continuous acquisition cycle that exceed the preset fluctuation range.

[0052] In the further step of step six, the preset time for motor stoppage is a fixed time preset by the control circuit board based on the self-priming stroke of the lock body. During the stoppage, the control circuit board continuously detects the position status of the large lock tongue through the lock tongue position switch.

[0053] In the further step of step six, the fault feedback signal is an electrical signal. After the fault feedback signal is transmitted to the vehicle's central control system, the fault is displayed on the vehicle's instrument panel and in-vehicle display screen.

[0054] In the further step of step seven, each component is reset to its initial state, namely, the self-priming motor is reset after power failure, the self-priming cable assembly is reset after stress relief, and the pull rod is reset to the hook lock waiting position under the action of the pull rod spring.

[0055] Because of the aforementioned method, this control method is highly compatible with the mechanical structure of a multi-mode unlocking intelligent pull-type self-closing lock with gear switching. This method, through real-time linkage between bolt position detection and motor operating parameters, achieves precise determination of the sealing strip resistance state and dynamic adaptive adjustment of the motor torque during the door's self-closing process. This effectively solves problems such as difficulty in closing the door due to differences in sealing strip resistance under different operating conditions, and excessive closing force. It ensures smooth door self-closing in low-temperature, high-resistance scenarios while avoiding wear on the lock body and body components due to excessive torque under normal resistance scenarios, extending the service life of the lock body and related door components. Simultaneously, by monitoring the instantaneous changes in motor operating parameters… The threshold-based monitoring enables precise triggering and execution of anti-pinch protection during the self-closing process. The protection logic of releasing force before retrying effectively avoids the risk of pinching and secondary pinching, improving the safety of car door use. Furthermore, the entire process is automated through the control circuit board, realizing signal acquisition, logic judgment, and action execution. Combined with the automatic reset design of components, the intelligent pull control and anti-pinch protection of the self-closing lock form a closed loop. Each action link is smoothly connected and responds promptly. It executes stably within the entire working voltage and temperature range of the lock body, without program jamming or command failure. This further enhances the intelligence, convenience, and reliability of car door locks, perfectly matching the high security and high adaptability requirements of car doors.

[0056] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0057] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A multi-mode unlocking intelligent pull-type self-closing lock with gear switching, characterized in that, The lock includes a lock case, a large bolt, a small bolt, an unlocking plate, an outward opening assembly, a safety assembly, an inward opening assembly, and a reinforcement assembly. The small bolt is used to keep the large bolt locked. Both the outward and inward opening assemblies are used to drive the unlocking plate to release the small bolt from locking the large bolt. The safety assembly is used to lock the outward opening assembly. The safety assembly can be automatically released from locking the outward opening assembly or released by manipulating the inward opening assembly. The reinforcement assembly is used to lock or release the large bolt.

2. The intelligent pull-type self-closing lock with multi-mode unlocking and gear switching according to claim 1, characterized in that, The outward opening assembly includes a front door cable assembly, a safety transmission block, an outward opening transmission arm, a limiting unit, and a rotating unit. The safety transmission block and the outward opening transmission arm are both coaxially and rotatably mounted within the lock housing with the unlocking plate. The limiting unit is used to limit the swing range of the safety transmission block. The front door cable assembly is used to pull the outward opening transmission arm to perform the unlocking action. The rotating unit is movably disposed between the safety transmission block and the outward opening transmission arm, and is used to push the unlocking plate to unlock when the outward opening transmission arm performs the unlocking action, and to drive the safety transmission block to move synchronously. It also includes a safety transmission block reset torsion spring for resetting the safety transmission block.

3. The multi-mode unlocking intelligent pull-type self-closing lock with gear switching according to claim 2, characterized in that, The limiting unit includes a safety transmission arm, a limiting groove, and a limiting block. One end of the safety transmission arm is hinged to the lock housing via a rivet shaft. The limiting groove is formed in the safety transmission arm. The limiting block slides into the limiting groove and is fixedly connected to the safety transmission block.

4. The intelligent pull-type self-closing lock with multi-mode unlocking and gear switching according to claim 2, characterized in that, The rotating unit includes a rotating block, a rotating groove, a rotating column, and a rotating plate. The rotating plate is fixedly mounted on the unlocking plate. The middle part of the rotating block is rotatably mounted on the bottom of the outward-opening transmission arm via a rivet shaft. The rotating groove is opened in the safety transmission block. The rotating column is fixedly mounted at the bottom of one end of the rotating block. The rotating column and the rotating groove are slidably engaged. When the outward-opening transmission arm and the safety transmission block are misaligned, the rotating block is rotated and kept in contact with the rotating plate.

5. The multi-mode unlocking intelligent pull-type self-closing lock with gear switching according to claim 4, characterized in that, The rotating unit also includes a limiting groove and a limiting block. The limiting block is fixedly installed on the top of the other end of the rotating block. The limiting groove is opened on the outward-opening transmission arm. The limiting groove is arc-shaped and concentric with the riveting shaft axis of the rotating block.

6. The intelligent pull-type self-closing lock with multi-mode unlocking and gear switching according to claim 2, characterized in that, The safety assembly includes a self-priming motor, a worm gear, and a worm drive block. The worm gear and the worm drive block are rotatably mounted in the lock housing via corresponding rivet shafts. The worm gear and the worm drive block are engaged by gear transmission, and the worm gear and the self-priming motor are engaged by worm transmission. A safety lock block is fixedly provided on the worm drive block, and a safety lock groove is provided on the safety drive block for engaging with the safety lock block.

7. The multi-mode unlocking intelligent pull-type self-closing lock with gear switching according to claim 6, characterized in that, The inward opening assembly includes a front door inward opening start arm and an inward opening drive arm. The front door inward opening start arm and the inward opening drive arm are rotatably mounted in the lock housing via corresponding riveting shafts. One end of the inward opening drive arm is connected to the front door inward opening start arm via a transmission pair, and the other end is provided with an inward opening toggle block. The inward opening toggle block is used to actuate the worm gear drive block, causing the safety drive block to disengage from the safety lock groove. The worm gear is floatingly mounted on the output shaft of the self-priming motor via a spring. One end of the front door inward opening start arm is connected to the interior door handle, and the other end is used to actuate the unlocking plate to perform the unlocking action.

8. The multi-mode unlocking intelligent pull-type self-closing lock with gear switching according to claim 1, characterized in that, It also includes a latch positioning plate, a positioning block, and a micro switch. The two ends of the latch positioning plate are respectively sleeved on the rivet shafts corresponding to the large latch and the small latch. The latch positioning plate has a positioning flange at one end corresponding to the large latch. The positioning block is fixedly set on the large latch and is used to contact the positioning flange for positioning when the large latch is in the locked state. The micro switch is triggered by the positioning block when the large latch is unlocked.

9. The multi-mode unlocking intelligent pull-type self-closing lock with gear switching according to claim 1, characterized in that, The reinforcement assembly includes a self-closing cable assembly, a reinforcement hook, a pull rod, and a pull rod spring. The reinforcement hook is fixedly mounted on the large latch, and the pull rod is hinged to the lock housing. When the large latch is locked, the reinforcement hook is located in the hook-lock position of the pull rod. The self-closing cable assembly is used to pull the pull rod to lock with the reinforcement hook. The pull rod spring is used to push the pull rod away from the reinforcement hook when the self-closing cable assembly is unloaded.

10. A smart control method for a car door intelligent pull-type self-closing lock, applied to the multi-mode unlocking intelligent pull-type self-closing lock with gear switching as described in claims 1-9, wherein the intelligent pull-type self-closing lock is provided with a bolt position switch, a self-closing motor, and a control circuit board with control circuitry, characterized in that, Includes the following steps: Step 1: After the door receives the entry / closure signal, the self-priming motor starts and drives the self-priming cable assembly to drive the door into the self-priming closing process. During this process, the latch position switch detects the real-time position signal of the large latch and transmits it to the control circuit board. At the same time, the control circuit board continuously collects two types of real-time operating status parameters of the self-priming motor: the self-priming motor drive current and the self-priming motor speed. Step 2: The control circuit board determines the current self-closing stage of the door based on the received real-time position signal of the large latch. The closing stage includes at least a half-lock stage and a full-lock stage. Step 3: The control circuit board compares the real-time operating status parameters of the self-priming motor collected with the pre-stored operating reference parameters of the self-priming motor for the corresponding half-lock / full-lock stages in real time to determine the resistance status of the door seal strip. If the drive current of the self-priming motor in the current closed phase exceeds the preset current reference value for the corresponding phase, and the speed is simultaneously lower than the preset speed reference value for the corresponding phase, it is determined to be a high resistance state of the door seal strip. If the drive current of the self-priming motor in the current closed phase is lower than the preset current reference value for the corresponding phase, and the speed is simultaneously higher than the preset speed reference value for the corresponding phase, it is determined to be the normal resistance state of the door seal strip. Step 4: Based on the dual determination results of the current closing stage of the door and the resistance status of the sealing strip, the control circuit board dynamically adjusts the drive current of the self-closing motor to regulate the output torque of the self-closing motor, adapting to the sealing strip resistance to complete the self-closing process. If the sealing strip is determined to be in a high resistance state, the control circuit board immediately increases the drive current of the self-priming motor and increases the output torque of the self-priming motor to ensure that the sealing strip resistance is overcome and the door can be smoothly self-primed to the corresponding stage; If the sealing strip is determined to be in a normal resistance state, the control circuit board maintains the normal drive current of the self-priming motor and maintains the normal output torque of the self-priming motor to avoid excessive force when closing the door due to excessive torque, and wear on the lock body or body parts. Step 5: During the entire process of the self-closing of the door driven by the self-closing motor from the half-lock stage to the fully-lock stage, the control circuit board continuously monitors the instantaneous changes in the operating status parameters of the self-closing motor. If the self-closing motor drive current is detected to suddenly increase beyond the preset anti-pinch current threshold, and the self-closing motor speed is simultaneously lower than the preset anti-pinch speed threshold, and the duration of this abnormal operating state reaches the preset anti-pinch time threshold, it is immediately determined that a foreign object is trapped in the door during the self-closing process, and the anti-pinch protection process is triggered. Step Six: After the anti-pinch protection process is triggered, the control circuit board immediately cuts off the positive drive power supply to the self-priming motor, controls the self-priming motor to stop rotating to release the door clamping force and prevent pinching or damage to components; after the self-priming motor stops rotating for a preset time, the control circuit board readjusts the self-priming motor torque strategy according to the previously determined sealing strip resistance status and attempts to drive the door to self-prime close again. If the number of self-priming attempts reaches the preset retry threshold and the door still does not complete full lock closure, the self-priming motor is controlled to stop all self-priming actions and a fault feedback signal is output to the vehicle control system. Step 7: When the latch position switch detects that the large latch has moved to the fully locked position, it immediately sends a signal to the control circuit board that the large latch is fully locked. After receiving the signal, the control circuit board immediately controls the self-closing motor to stop working. This door self-closing intelligent control process ends, and all components are reset to their initial state, waiting for the next entry and exit signal.

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