Door lock for automobile

Abstract

The invention discloses a door lock for an automobile, which comprises a lock body, a shell and a bottom plate, and is provided with a ratchet shaft, a pawl shaft and a locking rocker arm shaft. A ratchet wheel with a first-gear shaft is arranged on the ratchet wheel shaft; the pawl shaft is provided with a first pawl which can be meshed with the ratchet wheel in a full-locking mode and a second pawl which can be meshed with the first-gear shaft in a half-locking mode. The opening-preventing rocker arm shaft is provided with an opening-preventing rocker arm with a linkage shaft, and the opening-preventing rocker arm is matched with the limiting face of the first pawl through a contact arc to maintain the full-locking state. The door lock further comprises a mechanism which drives the second pawl to achieve electric release through an electric opening pull wire, and a snow load mechanism which achieves false locking prevention through matching of a snow load rocker arm and the V-shaped face of the second pawl. The lock has the advantages of being compact in structure, reliable in locking, small in opening force and capable of preventing secondary locking and safety redundancy.

Description

Technical Field

[0001] This invention relates to the field of vehicle door lock technology. More specifically, this invention relates to a door lock for automobiles. Background Technology

[0002] With the development of the automotive industry, users have placed higher demands on the safety, convenience, and reliability of vehicles. As a key component ensuring the safety of occupants and vehicle property, the performance of car door locks directly affects the overall user experience. Traditional car door locks, especially side door locks, typically include a lock body, a latch, and a transmission mechanism for locking and unlocking. Their core function is to reliably lock the door in the closed position and to allow for safe and smooth opening when needed.

[0003] Currently, common car door locks on the market still face some technical bottlenecks in structural design and functional integration. Firstly, regarding locking reliability, many locks use a single pawl and ratchet engagement structure to maintain a fully locked state. This structure may suffer from insufficient holding force or accidental disengagement under continuous vibration or impact. Simply increasing the spring force to improve holding force directly increases the opening force, affecting the user's operating feel and the load on the electric opening mechanism. Secondly, in terms of functional integration, functions such as electric release, mechanical emergency opening, and anti-mislocking (e.g., snow load protection) are often added to the lock body relatively independently, resulting in complex internal structures, numerous parts, and difficult assembly. Furthermore, the linkage logic between various functions may have interference or unreliability issues. For example, during the electric opening of the car door, if external resistance (such as snow or ice) causes the door to spring back before fully opening, the pawl mechanism may prematurely reset and collide with the moving ratchet, producing abnormal noise or even causing secondary locking, posing a safety hazard. In addition, the existing emergency opening mechanism design may be too direct and crude, lacking smooth intervention of the main locking mechanism, and is prone to wear and tear with long-term use.

[0004] Therefore, there is an urgent need for a new type of car door lock that can integrate and coordinate advanced functions such as electric release, snow load protection, and emergency opening while ensuring extremely high locking reliability and minimal opening force, so as to achieve comprehensive performance with compact structure, reliable operation, and high safety redundancy. Summary of the Invention

[0005] This invention provides a door lock for automobiles, aiming to solve the problems of contradiction between holding force and opening force, easy interference between various functional mechanisms, and lack of protection against accidental locking in traditional door locks. By integrating the coordinated locking of double pawls and a rocker arm, snow load protection, and a dual-mode opening mechanism for both electric and emergency operation, it achieves a comprehensive effect of high reliability, high security, and compact structure.

[0006] The technical solution adopted by this invention to solve this technical problem is: a car door lock, including a lock body, a housing, and a base plate, and further comprising: Ratchet shaft, pawl shaft, limit shaft and blocking rocker arm shaft are provided on the base plate; A ratchet is rotatably mounted on the ratchet shaft, and the ratchet is provided with a stop shaft; A first pawl and a second pawl are rotatably mounted on the pawl shaft. The first pawl is used to achieve full lock engagement with the ratchet, and the second pawl is used to achieve partial lock engagement with the first stop shaft of the ratchet. A blocking rocker arm rotatably mounted on the blocking rocker arm shaft, the blocking rocker arm having a linkage shaft; and The rocker arm return spring is provided on the lock body; When the ratchet and the first pawl are in a fully locked engagement state, the contact arc of the blocking rocker arm abuts against the limiting surface of the first pawl under the action of the blocking rocker arm return spring, so as to maintain the fully locked state.

[0007] As a further aspect of the present invention, the contact arc of the blocking rocker arm is an arc concentric with its rotation center.

[0008] As a further aspect of the present invention, it further includes an electrically released mechanism, the electrically released mechanism comprising: Actuator; An electric pull cable, one end of which is connected to the actuator, and the other end of which is connected to the second pawl; When the actuator is powered on, the second pawl is driven to rotate through the power switch cable. The contact surface on the second pawl first pushes the linkage shaft of the blocking rocker arm to make the blocking rocker arm move aside. At the same time, the contact surface on the second pawl pushes the first pawl to rotate, so that the first pawl disengages from the ratchet.

[0009] As a further aspect of the present invention, the second pawl is provided with a circular hole and an open circular hole; The electric switch cable is equipped with a plastic connector, which is sleeved on the thin steel wire rope of the electric switch cable and can slide freely back and forth along the steel wire rope. It is equipped with a cylindrical surface and a four-point buckle. The head of the steel wire rope of the electric switch cable is equipped with a ball.

[0010] As a further aspect of the present invention, it also includes a snow-loading mechanism, the snow-loading mechanism comprising: A snow-loaded rocker arm rotatably mounted on the housing, the snow-loaded rocker arm having a V-shaped groove; A snow rocker arm return spring is provided on the snow rocker arm; and A V-shaped limiting surface is provided on the second pawl; When the second pawl rotates to a predetermined position during the door lock opening process, the snow-loaded rocker arm rotates under the action of the snow-loaded rocker arm return spring, and its V-shaped groove abuts against the V-shaped limiting surface of the second pawl to restrict the second pawl from resetting; when the ratchet rotates to the fully open position, its first stop shaft pushes the snow-loaded rocker arm to rotate, causing the V-shaped groove to disengage from the V-shaped limiting surface.

[0011] As a further aspect of the present invention, when the door lock is in the fully locked closed state, the contact surface of the snow-loaded rocker arm contacts and limits the V-shaped limiting surface of the second pawl.

[0012] As a further aspect of the present invention, it also includes an emergency opening mechanism, the emergency opening mechanism comprising: An emergency opening rocker arm is provided with seven contact surfaces. An emergency opening pull cord, one end of which is connected to the emergency opening rocker arm; Specifically, operating the emergency opening cable can drive the emergency opening rocker arm to rotate, and push the second pawl to rotate through its contact surface, thereby unlocking the door.

[0013] As a further aspect of the present invention, the emergency opening pull cable is connected by inserting its cylindrical end into the second circular hole of the emergency opening rocker arm.

[0014] As a further aspect of the present invention, it further includes a conductive plate and a micro switch, wherein the micro switch is assembled in a slot of the conductive plate to form a sub-assembly, and the sub-assembly is then assembled into a corresponding slot of the lock body.

[0015] As a further aspect of the present invention, the housing is provided with a flip cover.

[0016] The present invention has at least the following beneficial effects: 1. High locking reliability and low opening force. By setting a blocking rocker arm that cooperates with the first pawl, and designing its contact arc as an arc concentric with its own rotation center, this structure can stably and reliably maintain the full lock position of the first pawl with a small force under the action of the blocking rocker arm return spring. This effectively solves the contradiction between holding force and opening force in traditional structures, ensuring the locking safety of the door under vibration and impact, and reducing the driving force required for electric or manual opening.

[0017] 2. Compact structure and excellent functional synergy. This invention creatively integrates a double pawl locking mechanism, an electric release mechanism, a snow load protection mechanism, and an emergency opening mechanism into a single unit. Each mechanism operates with the second pawl as its core, exhibiting clear operational logic and precise timing coordination. For example, during electric release, the second pawl first pushes the blocking rocker arm to make way before pushing the first pawl. The snow load mechanism, during the opening process, temporarily locks the second pawl's position through a V-shaped locking mechanism, releasing it only after the ratchet is fully open. This design achieves efficient multi-functional linkage, avoids interference between mechanisms, and features a compact overall structure that is easy to assemble and maintain.

[0018] 3. High safety redundancy and superior anti-misoperation performance. The introduction of the snow load protection mechanism effectively prevents accidental closing of the door during electric or manual opening: After pressing the door opening button on the vehicle body, the ECU controls the actuator to be energized, pulling the second pawl to open the door via the electric release cable. Under the action of the snow load rocker arm, the pawl can only be reset after the ratchet is fully open. This eliminates the need for the actuator to be continuously energized (locked) to keep the pawl in the open position. The mechanical structure extends the lifespan of the actuator motor, improves the reliability of the actuator, and ensures both convenience and safety in opening the door. The independent mechanical emergency opening mechanism provides a backup opening solution in case of electrical system failure, ensuring that the door can be safely opened under any circumstances, forming a double safety guarantee.

[0019] 4. Improved ease of testing and assembly. The modular design, which involves first assembling the microswitch into a sub-assembly within the conductive plate slot, and then installing the entire assembly into the lock body, improves the assembly accuracy and efficiency of the electrical testing components. The flip-top design on the housing facilitates the installation, debugging, and subsequent maintenance of the electric release cable and emergency release cable.

[0020] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the automotive door lock of the present invention.

[0022] Figure 2 This is a partial schematic diagram of the ratchet and first pawl engagement structure in this invention.

[0023] Figure 3 This is a schematic diagram of the rocker arm structure.

[0024] Figure 4 This is a schematic diagram of a ratchet structure, showing its first engagement shaft and the fully locked engagement arc.

[0025] Figure 5 This is a schematic diagram showing the connection between the conductive plate and the micro switch.

[0026] Figure 6 A schematic diagram of the components installed on the lock body.

[0027] Figure 7 This is a view of the lock body assembly after the housing has been assembled.

[0028] Figure 8 This is a schematic diagram of the mounting surface of the lock body assembly.

[0029] Figure 9 This is a schematic diagram showing the positional relationship between the ratchet and the first pawl in a fully locked engagement state.

[0030] Figure 10 This is a schematic diagram showing the positional relationship between the ratchet and the second pawl in a semi-locked engagement state.

[0031] Figure 11 This is a schematic diagram showing the engagement relationship between the locking rocker arm and the first pawl in the fully locked state.

[0032] Figure 12 This is a schematic diagram of the first pawl structure.

[0033] Figure 13 This is a schematic diagram of the second pawl structure.

[0034] Figure 14 This is a schematic diagram showing the connection between the electric switch cable and the actuator.

[0035] Figure 15 This is a schematic diagram of the end structure of the electric switch pull cable, showing its buckle and cylindrical head.

[0036] Figure 16 This is a schematic diagram of the actuator end.

[0037] Figure 17 This is a partial schematic diagram showing the connection between the actuator and the electric switch cable.

[0038] Figure 18 This is a schematic diagram of the connection between the electric release cable and the lock body.

[0039] Figure 19 This is a schematic diagram showing the other end of the electric release cable being snapped into the latch of the lock body via a buckle.

[0040] Figure 20 This is a schematic diagram showing the electric release cable connected to the lock body.

[0041] Figure 21 This is a schematic diagram of the second pawl rotating clockwise around the pawl axis.

[0042] Figure 22 This is a schematic diagram showing the ratchet and the first pawl in a fully locked state.

[0043] Figure 23A schematic diagram showing the contact surface three on the pawl contacting the linkage shaft on the blocking rocker arm to push the blocking rocker arm to make way.

[0044] Figure 24 This diagram shows the door in its fully open position, with the ratchet rotating to the fully open position under the action of the latch and the ratchet return spring.

[0045] Figure 25 This is a detailed view of the second pawl.

[0046] Figure 26 A schematic diagram showing the snow-loaded rocker arm mounted on the housing.

[0047] Figure 27 This is a schematic diagram of the snow-loaded rocker arm state when the ratchet is in the fully locked position.

[0048] Figure 28 This is a schematic diagram of a snow-loaded rocker arm structure.

[0049] Figure 29 This is a schematic diagram of the second pawl structure.

[0050] Figure 30 This is a schematic diagram showing the state where the snow-loaded rocker arm and the second pawl are in contact when the ratchet is not fully open.

[0051] Figure 31 This is a schematic diagram showing the first gear of the ratchet rotating into contact with the contact surface five on the snow-loaded rocker arm.

[0052] Figure 32 This diagram illustrates how the first gear on the ratchet drives the snow-loaded rocker arm to rotate and disengage from the second pawl.

[0053] Figure 33 This is a structural diagram of an emergency guy wire.

[0054] Figure 34 A schematic diagram of the structure for opening the rocker arm in an emergency.

[0055] Figure 35 A schematic diagram showing the contact surface seven on the rocker arm and the contact surface six on the second pawl in an emergency, which pushes the second pawl to rotate and open the door lock.

[0056] Figure 36 This is a schematic diagram of the electric pull wire and the second ratchet pawl assembly.

[0057] Wherein, 1-shell, 2-lock body, 2-A-jaw 1, 2-B-jaw 2, 3-base plate, 4-flip cover, 5-ratchet, 5-A-first stop shaft, 5-B-full lock engagement arc 1, 5-C-arc surface, 6-first pawl, 6-A-engagement arc 2, 6-B-limiting surface 1, 6-C-limiting surface 2, 6-D-limiting surface 3, 6-E-contact surface 2, 6-F-rounded corner, 7-second pawl, 7-A- 7-B-Meshing Arc 3, 7-C-Contact Surface 3, 7-D-Limiting Surface 4, 7-EV Type Limiting Surface, 7-F-Contact Surface 6, 7-G-Opening Circular Hole, 8-Ratchet Shaft, 9-Pawl Shaft, 10-Limiting Shaft, 11-Connecting Plate, 12-Emergency Opening Rocker Arm, 12-A-Circular Hole 2, 12-B-Contact Surface 7, 13-Ratchet Vibration Damping Pad 1, 14-Ratchet Vibration Damping Pad 1, 15-Ratchet Vibration Damping Pad 2, 1 6-Snow-loaded rocker arm, 16-AV type slot, 16-B-Contact surface four, 16-C-Contact surface five, 17-Conductive plate, 18-Second pawl return spring, 19-Snow-loaded rocker arm return spring, 20-Release rocker arm return spring, 21-Ratchet spring, 22-Snap three, 23-Release rocker arm shaft, 24-Release rocker arm, 24-A-Linkage shaft, 24-B-Contact arc, 24-C-Limiting surface five, 24-D-Contact surface one. 25-Micro switch, 26-Self-tapping screw, 27-Actuator, 27-A-Mounting hole one, 27-B-Mounting hole two, 27-C-Mounting hole three, 27-D-Slot, 27-E-Cylindrical slot, 28-Power switch pull cable, 28-A-Snap one, 28-B-Cylindrical head, 28-C-Snap two, 28-D-Spherical ball, 28-E-Plastic connector, 28-E1-Cylindrical surface, 28-E2-Snap four, 29-Emergency pull cable, 29-A-Cylindrical head, 29-B-Manual pull ring. Detailed Implementation

[0058] The present invention will now be described in detail and completely with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that the technical solutions and features provided in various parts of the present invention, including the following description, can be combined with each other without conflict.

[0059] Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0060] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific implementation process is as follows: like Figures 1-35 As shown, the present invention provides a door lock for automobiles, including a lock body 2, a housing 1 and a base plate 3. The base plate 3 is provided with the lock body 2, and the lock body 2 is also provided with a second ratchet spring 18, a ratchet spring 21, a conductive plate 17, a lock buckle shock absorber 13, a ratchet shock absorber 14 and a ratchet shock absorber 15. The housing 3 is fastened to the base plate by three self-tapping screws 26; it also includes: a ratchet shaft 8, a pawl shaft 9, a limiting shaft 10, and a rocker arm blocking shaft 23 disposed on the base plate 3; a ratchet 5 rotatably disposed on the ratchet shaft 8, the ratchet 5 having a stop shaft 5-A; a first pawl 6 and a second pawl 7 rotatably disposed on the pawl shaft 9, the first pawl 6 being used to achieve full locking engagement with the ratchet 5, and the second pawl 7 being used to achieve locking engagement with the stop shaft 5-A of the ratchet 5. The lock is currently partially engaged; a blocking rocker arm 24 is rotatably mounted on the blocking rocker arm shaft 23, and the blocking rocker arm 24 is provided with a linkage shaft 24-A; and a blocking rocker arm return spring 20 is provided on the lock body 2; wherein, when the ratchet 5 and the first pawl 6 are in a fully locked engagement state, under the action of the blocking rocker arm return spring 20, the contact arc 24-B of the blocking rocker arm 24 abuts against the limiting surface 6-B of the first pawl 6 to maintain the fully locked state.

[0061] In the above technical solution, when the ratchet 5 and the first pawl 6 are fully locked ( Figure 9 The fully locking engagement arc 5-B on the ratchet 5 abuts against the engagement arc 6-A on the first pawl 6. Under the action of the rocker arm return spring 20, the limiting surface 24-C of the blocking rocker arm 24 contacts the limiting shaft 10, and the contact arc 24-B abuts against the limiting surface 6-B. At the same time, the limiting surface 6-D on the first pawl 6 abuts against the limiting shaft 10, keeping the first pawl 6 in the fully locked position. The contact arc 24-B on the rocker arm 24 is an arc concentric with the rotation center of the rocker arm 24, so the rocker arm 24, under the action of the rocker arm return spring 20, can stably maintain the first pawl 6 in the fully locked position with a small force, while requiring only a very small opening force.

[0062] When the ratchet 5 and the second pawl 7 are in a semi-locked engagement, the engagement arc 3 7-B on the second pawl 7 abuts against the first stop shaft 5-A on the ratchet 5, and simultaneously the limiting surface 4 7-D on the second pawl 7 abuts against the limiting shaft 10. Under the action of the second pawl return spring 18, the second pawl 7 remains in the semi-locked position. At this time, the rounded corner 6-F on the first pawl 6 contacts the arc surface 5-C of the ratchet 5, preventing the contact surface 1 24-D on the rocker arm 24 from contacting the limiting surface 2 6-C on the first pawl 6.

[0063] In another technical solution, such as Figure 3As shown, the contact arc (24-B) of the blocking rocker arm (24) is an arc concentric with its rotation center. The blocking rocker arm 24 also has a limiting surface 24-C and a contact surface 24-D. In another technical solution, an electrically released mechanism is also included, the electrically released mechanism comprising: The actuator 27 is fixed to the vehicle body by three mounting holes: mounting hole 1 27-A, mounting hole 27-B, and mounting hole 3 27-C. It is connected to the door lock assembly via the electric release cable 28.

[0064] The electric pull cable 28 has one end connected to the actuator 27 and the other end connected to the second pawl 7; The actuator 27 is engaged with the electric release cable 28: the electric release cable 28 is provided with a buckle 28-A that engages with the slot 27-D on the actuator 27, and the cylindrical head 28-B fits into the cylindrical hole 27-E. When the actuator 27 is powered on, the cylindrical hole 27-E will move linearly (extend and retract) driven by the rotation of the motor, gears, screw and other components, and the motion is transmitted to the lock body through the electric release cable 28.

[0065] The lock assembly is fully closed, that is, when the ratchet 5 and the first pawl 6 are in a fully locked state ( Figure 22 The actuator 27 transmits motion to the second pawl 7 via the electrically operated pull cable 28, and the second pawl 7 rotates clockwise around the pawl axis. Figure 21 The contact surface 7-C on the pawl 7 contacts the linkage shaft 24-A on the rocker arm 24, pushing the rocker arm 24 to move aside. Figure 23 At the same time, the limiting surface 7-D on the second pawl 7 abuts against the contact surface 6-E of the first pawl, pushing the first pawl 6 to rotate synchronously and make it move, so that the fully locking engagement arc 5-B on the ratchet 5 ( Figure 4 ) and the meshing arc 6-A on the first pawl 6 ( Figure 12 The ratchet 5 disengages, and under the action of the latch and ratchet return spring 21, it rotates to the fully open position, opening the car door. Figure 24 ).

[0066] In another technical solution, such as Figure 13 , 18 As shown in Figure 36, the second pawl 7 is provided with a circular hole 7-A and an open circular hole 7-G.

[0067] The electric switch pull wire 28 is provided with a plastic connector 28-E, which is sleeved on the thin steel wire rope of the electric switch pull wire 28 and can slide freely back and forth along the steel wire rope. It is provided with a cylindrical surface 28-E1 and a buckle 28-E2. The head of the steel wire rope of the electric switch pull wire 28 is provided with a ball 28-D.

[0068] When the electric release cable 28 is assembled with the second pawl 7, the buckle 28-E2 on the plastic connector 28-E is engaged in the round hole 7-A of the second pawl 7, and the cylindrical surface 28-E1 is engaged in the round hole 7-G. When the actuator is energized and the electric release cable is working, the second pawl 7 is rotated through the contact between the ball 28-D and the plastic connector 28-E.

[0069] The above structure is designed so that when the emergency rocker arm 12 pushes the second pawl 7 to rotate during emergency opening, it will not cause the steel wire rope of the electric release cable 28 to move together, thus avoiding the steel wire rope from being bent and causing the lock body to jam and fail.

[0070] In another technical solution, a snow-loading mechanism is also included, which comprises: A snow-loaded rocker arm 16 is rotatably mounted on the housing 1. The snow-loaded rocker arm 16 is fixed to the housing 1 by a buckle 22. The snow-loaded rocker arm 16 has a V-shaped groove 16-A. Snow rocker arm return spring 19 is provided on the snow rocker arm 16; and The V-shaped limiting surface 7-E is provided on the second pawl 7; When the second pawl 7 rotates to a predetermined position during the door lock opening process, the snow-loaded rocker arm 16 rotates under the action of the snow-loaded rocker arm return spring 19, and its V-shaped groove 16-A abuts against the V-shaped limiting surface 7-E of the second pawl 7 to restrict the second pawl 7 from resetting; when the ratchet 5 rotates to the fully open position, its first stop shaft 5-A pushes the snow-loaded rocker arm 16 to rotate, so that the V-shaped groove 16-A disengages from the V-shaped limiting surface 7-E.

[0071] In the above technical solution, when the door lock is being opened, the second pawl 7 pushes the first pawl 6 to rotate and move together, and the snow-loaded rocker arm 16 rotates clockwise under the action of the snow-loaded rocker arm return spring 19. The V-shaped groove 16-A on it abuts against the V-shaped limiting surface 7-E on the second pawl 7, so that the second pawl 7 is kept in the open position and cannot engage with the ratchet 5. Figure 30 Ratchet 5 is opened by rotating it clockwise, and the first gear 5-A on ratchet 5 ( Figure 4 Rotate to the contact surface 16-C on the snow-loaded rocker arm 16. Figure 28 )touch( Figure 31 At this point, ratchet 5 is fully open, and the first gear shaft 5-A on ratchet 5 pushes the snow-loaded rocker arm 16 to rotate and disengage from the second pawl 7, allowing the second pawl 7 and the first pawl 6 to return to their normal reset and restore normal engagement function. Figure 32 ).

[0072] In another technical solution, when the door lock is in the fully locked closed state, the contact surface 16-B of the snow-loaded rocker arm 16 contacts and limits the V-shaped limiting surface 7-E of the second pawl 7.

[0073] In another technical solution, an emergency opening mechanism is also included, the emergency opening mechanism comprising: Emergency opening rocker arm 12, which is provided with contact surface 7 12-B; Emergency opening pull cable 29, one end of which is connected to the emergency opening rocker arm 12; Specifically, operating the emergency opening pull cord 29 can drive the emergency opening rocker arm 12 to rotate, and push the second pawl 7 to rotate through its contact surface 12-B, thereby realizing the door lock opening.

[0074] In the above technical solution, the emergency opening mechanism includes: an emergency opening pull cord 29 that is engaged with a latch 2-B on the lock body 2. Figure 19 ), the cylindrical head 29-A on the emergency guy wire 29 ( Figure 33 ) It is snapped into the round hole 12-A on the emergency opening rocker arm 12 ( Figure 34 When the car door needs to be manually opened in an emergency, the manual pull ring 29-B on the emergency pull cable 29 is pulled to rotate the emergency opening rocker arm 12. The contact surface 12-B on the emergency opening rocker arm 12 contacts the contact surface 7-F on the second pawl 7, pushing the second pawl 7 to rotate and open the door lock. Figure 35 ).

[0075] In another technical solution, the emergency opening pull cable 29 is connected by inserting its cylindrical head 29-A into the circular hole 12-A of the emergency opening rocker arm 12.

[0076] In another technical solution, a conductive plate 17 and a micro switch 25 are also included. The micro switch 25 is assembled in the slot of the conductive plate 17 to form a sub-assembly, and then the sub-assembly is assembled into the corresponding slot of the lock body 2.

[0077] In another technical solution, a flip cover 4 is provided on the housing 1, which facilitates the assembly and maintenance of the electric opening pull cable 28 and the emergency opening pull cable 29.

[0078] This invention has the following functions: I. The electric opening function of the present invention is implemented as follows: When the actuator 27 is energized, it drives the second pawl 7 to rotate through the electric opening pull cable 28. The second pawl 7 is provided with a contact surface 3 7-C, which first pushes the blocking rocker arm 24 to rotate, so that the contact surface 24-B on the blocking rocker arm 24 disengages from the contact surface 6-B on the first pawl 6. Then, the limiting surface 4 7-D on the second pawl 7 contacts the contact surface 2 6-E on the first pawl 6, pushing the first pawl 6 to rotate. The first pawl 6 disengages from the ratchet 5, and the door lock is opened.

[0079] II. The snow-carrying mechanism of the present invention is implemented as follows: The snow-mounted rocker arm 22 is provided with a contact surface 16-B and a V-shaped groove 16-A. When the door lock is in the closed state, i.e., when the ratchet 5 is fully engaged with the first pawl 6, the contact surface 16-B of the snow-mounted rocker arm 22 abuts against the second pawl 7 under the action of the snow-mounted rocker arm return spring 19. When the second pawl 7 is opened in manual or electric mode, the second pawl 7 rotates away from the ratchet 5 until the V-shaped limiting surface 7-E slides out of the contact surface 16-B. At this time, the V-shaped groove 16-A and the V-shaped limiting surface 7-E are engaged with each other. At this time, the second pawl 7 is limited and cannot be reset to engage. When the ratchet 5 is fully opened, the first stop shaft 5-A on the ratchet 5 abuts against the contact surface 16-C of the snow-mounted rocker arm 16, pushing the snow-mounted rocker arm 16 to rotate until it disengages from the second pawl 7. At this time, the ratchet 5 is fully opened, and the second pawl 7 can be reset to engage with the ratchet 5 normally. That is, the first pawl 6 and the second pawl 7 can only be reset after the ratchet 5 is fully opened, to prevent the door from being accidentally closed or reopened during the opening process.

[0080] III. The emergency opening function of the present invention is realized by: a special emergency opening rocker arm 12 is provided in the door lock, which has a round hole 12-A connected to the emergency opening pull line 29. When the emergency opening pull line 29 is operated, it drives the emergency opening rocker arm 12 to rotate. The emergency opening rocker arm 12 has a contact surface 12-B that contacts the second pawl 7, pushing the second pawl 7 to rotate, and the door lock is opened.

[0081] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A car door lock, comprising a lock body (2), a housing (1), and a base plate (3), characterized in that, Also includes: The ratchet shaft (8), pawl shaft (9), limit shaft (10) and rocker arm blocking shaft (23) are provided on the base plate (3); A ratchet (5) is rotatably mounted on the ratchet shaft (8), and a stop shaft (5-A) is provided on the ratchet (5); A first pawl (6) and a second pawl (7) are rotatably mounted on the pawl shaft (9). The first pawl (6) is used to achieve full lock engagement with the ratchet (5), and the second pawl (7) is used to achieve partial lock engagement with the first stop shaft (5-A) of the ratchet (5). A blocking rocker arm (24) is rotatably mounted on the blocking rocker arm shaft (23), and the blocking rocker arm (24) is provided with a linkage shaft (24-A); and The rocker arm return spring (20) is provided on the lock body (2); When the ratchet (5) and the first pawl (6) are in a fully locked engagement state, the contact arc (24-B) of the blocking rocker arm (24) abuts against the limiting surface (6-B) of the first pawl (6) under the action of the blocking rocker arm return spring (20) to maintain the fully locked state.

2. The automotive door lock as described in claim 1, characterized in that, The contact arc (24-B) of the blocking rocker arm (24) is an arc concentric with its rotation center.

3. The automotive door lock as described in claim 1, characterized in that, It also includes an electrically released mechanism, which comprises: Actuator (27); An electric pull wire (28) is connected at one end to the actuator (27) and at the other end to the second pawl (7); When the actuator (27) is powered on, the second pawl (7) is driven to rotate through the power switch cable (28). The contact surface (7-C) on the second pawl (7) first pushes the linkage shaft (24-A) of the blocking rocker arm (24) to make the blocking rocker arm (24) move aside. At the same time, the contact surface (7-D) on the second pawl (7) pushes the first pawl (6) to rotate, so that the first pawl (6) disengages from the ratchet (5).

4. The automotive door lock as described in claim 3, characterized in that, The second pawl (7) is provided with a round hole (7-A) and an open round hole (7-G); The electric pull wire (28) is provided with a plastic connector (28-E). The plastic connector (28-E) is sleeved on the thin steel wire rope of the electric pull wire (28) and can slide freely back and forth along the steel wire rope. It is provided with a cylindrical surface (28-E1) and a buckle four (28-E2). The head of the steel wire rope of the electric pull wire (28) is provided with a ball (28-D).

5. The automotive door lock as described in claim 1, characterized in that, It also includes a snow-loading mechanism, which includes: A snow-loaded rocker arm (16) is rotatably mounted on the housing (1), the snow-loaded rocker arm (16) having a V-shaped groove (16-A); Snow rocker arm return spring (19) is provided on the snow rocker arm (16); and A V-shaped limiting surface (7-E) is provided on the second pawl (7); When the second pawl (7) rotates to a predetermined position during the door lock opening process, the snow-loaded rocker arm (16) rotates under the action of the snow-loaded rocker arm return spring (19), and its V-shaped groove (16-A) abuts against the V-shaped limiting surface (7-E) of the second pawl (7) to restrict the second pawl (7) from resetting; when the ratchet (5) rotates to the fully open position, its first stop shaft (5-A) pushes the snow-loaded rocker arm (16) to rotate, so that the V-shaped groove (16-A) disengages from the V-shaped limiting surface (7-E).

6. The automotive door lock as described in claim 5, characterized in that, When the door lock is in the fully locked closed state, the contact surface four (16-B) of the snow-loaded rocker arm (16) contacts and limits the V-shaped limiting surface (7-E) of the second pawl (7).

7. The automotive door lock as described in claim 3, characterized in that, It also includes an emergency opening mechanism, which includes: An emergency opening rocker arm (12) is provided with a contact surface seven (12-B); An emergency opening pull cord (29) is provided, one end of which is connected to the emergency opening rocker arm (12); The operation of the emergency opening pull cord (29) can drive the emergency opening rocker arm (12) to rotate, and push the second pawl (7) to rotate through its contact surface seven (12-B), thereby realizing the door lock opening.

8. The automotive door lock as described in claim 7, characterized in that, The emergency opening pull cable (29) is connected by inserting its cylindrical head (29-A) into the second round hole (12-A) of the emergency opening rocker arm (12).

9. The automotive door lock as described in claim 1, characterized in that, It also includes a conductive plate (17) and a micro switch (25). The micro switch (25) is assembled in the slot of the conductive plate (17) to form a sub-assembly, and then the sub-assembly is assembled into the corresponding slot of the lock body (2).

10. The automotive door lock as described in claim 7, characterized in that, The housing (1) is provided with a flip cover (4).

Images