A door lock capable of assisting in opening the door

Abstract

The present invention belongs to the technical field of automobiles and discloses a door lock capable of assisting in opening the door. It can be arranged inside the door and includes a ratchet wheel. The ratchet wheel can rotate forward and backward to be in a locking position where it captures a latch arranged on the vehicle body of the automobile to close the door, or in an unlocking position where it releases the latch to allow the door to open. An indentation is formed by concaving inward from the rim of the ratchet wheel. The inner wall of the indentation is configured to guide the latch into the indentation when the ratchet wheel rotates forward, and guide the latch out of the indentation when the ratchet wheel rotates backward. The door lock further includes an ice-breaking mechanism arranged inside the door. The ice-breaking mechanism can apply torque to the ratchet wheel to make the ratchet wheel rotate backward to push against the latch to open the door. The door lock can be opened when the door is frozen or deformed due to collision by pushing the ratchet wheel. It has low operating noise, low cost, and does not damage the paint surface of the door.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle door locks, and particularly to a vehicle door lock capable of assisting in door opening. Background Art

[0002] The locking of a vehicle door generally relies on a door lock provided on the door and a lock catch provided on the vehicle body. The structure of the door lock is generally a ratchet and pawl type, that is, the relative positions of the ratchet and the pawl are controlled to keep the door in an open or closed state.

[0003] Specifically, during the closing process of the door, the lock catch impacts the ratchet, causing the ratchet to rotate and capture the lock catch. During this process, the ratchet obtains the potential energy that can drive its rotation through an external elastic member. When the door reaches the closed position, the pawl can stop the ratchet and restrict the rotation of the ratchet to keep the door locked. An external release mechanism (such as an external door handle) or an internal release mechanism (such as an internal door handle) capable of opening the door lock is connected to the pawl through a mechanical structure (generally a wire or a rod), so that the ratchet is released by actuating the pawl, and the rotation of the ratchet realizes the opening of the door lock.

[0004] Currently, door locks with an electric release function have been gradually applied to the electric doors of passenger vehicles. The electric release actuator equipped can actuate the pawl to release the ratchet based on a release signal formed by manual triggering to realize the opening of the door lock. However, in extremely cold weather, the door and the door lock will be frozen due to icing, or when the door is deformed by collision, the ratchet cannot rotate back to fully release the lock catch, and the door cannot be electrically released. Especially for vehicles with hidden external door handles, it is even more difficult to open the door by pulling the external door handle.

[0005] Therefore, some vehicles have correspondingly equipped an ice-breaking mechanism. The ice-breaking mechanism is provided on the inner panel of the door and includes an ice-breaking ejector rod that can extend out of the inner panel of the door and an ice-breaking actuator for driving the telescopic movement of the ice-breaking ejector rod. When the door and the door lock are frozen or stuck due to door deformation, the ice-breaking actuator drives the ice-breaking ejector rod to extend out of the inner panel of the door to push against the vehicle body in the reverse direction, thereby opening the door.

[0006] It can be understood that the above-mentioned ice-breaking mechanism will generate noise during operation, and the ice-breaking ejector rod will damage the vehicle paint surface at the position (such as the B-pillar) of the vehicle body where it is pushed against. At the same time, there are also safety hazards in the operation mode of relying on the ice-breaking ejector rod to extend out of the inner panel of the door. Summary of the Invention

[0007] The purpose of the present invention is to provide a vehicle door lock capable of assisting in door opening. The door lock can realize door opening by pushing the ratchet, has low operation noise, low cost, and does not damage the door paint surface.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] A door lock capable of assisting in opening the door. The door lock can be fixed inside the door of an automobile and includes a ratchet wheel. The ratchet wheel can rotate forward and backward to be in a locking position where it catches a latch provided on the vehicle body of the automobile to close the door, or in an unlocking position where it releases the latch to allow the door to open.

[0010] The door lock further includes an ice-breaking mechanism provided inside the door. The ice-breaking mechanism can apply a torque to the ratchet wheel, causing the ratchet wheel to rotate backward and push against the latch to open the door.

[0011] Preferably, the ice-breaking mechanism is configured to apply a traction force to a part of the ratchet wheel other than the rotating shaft to form the torque for causing the ratchet wheel to rotate backward.

[0012] Preferably, the ice-breaking mechanism includes:

[0013] An actuator fixed to the door; and

[0014] An ice-breaking wire. The ice-breaking wire is connected between the ratchet wheel and the actuator to transmit the traction force to the ratchet wheel when the actuator pulls the ice-breaking wire.

[0015] Preferably, the ice-breaking mechanism further includes:

[0016] A wheel rod pivotally connected coaxially with the ratchet wheel and connected to the ice-breaking wire. When the actuator pulls the wheel rod through the ice-breaking wire, the wheel rod can abut against the ratchet wheel in the locking position after rotating a preset angle, and drive the ratchet wheel to rotate backward to the unlocking position when continuing to rotate.

[0017] Preferably, the door lock further includes:

[0018] A torsion spring configured to reset the ratchet wheel and keep it in the locking position.

[0019] Preferably, the torsion spring is sleeved on the rotating shaft of the ratchet wheel, and its two ends are respectively connected to the ratchet wheel and the wheel rod to be able to reset the wheel rod.

[0020] Preferably, the ice-breaking mechanism further includes a cam pivotally connected coaxially with the ratchet wheel. The cam includes:

[0021] A plugging portion plugged and connected with the ratchet wheel to make the cam and the ratchet wheel rotate synchronously; and

[0022] An abutting portion provided on the rotation trajectory of the wheel rod to enable the wheel rod to push against the cam to rotate.

[0023] Preferably, the cam further includes:

[0024] A cam profile that can trigger a microswitch when the ratchet is in the unlocking position, and the microswitch is electrically connected to the actuator.

[0025] Preferably, the cam includes:

[0026] A metal body formed with the insertion portion and the abutting portion; and

[0027] A plastic body formed with the cam profile, and the plastic body is formed by overmolding on the metal body.

[0028] Preferably, the door lock further includes:

[0029] A buffer block that can respectively abut against both ends of the buffer block when the ratchet is in the locking position and the unlocking position.

[0030] Advantages of the present invention:

[0031] The door lock capable of assisting in opening the door provided by the present invention, when the door and the door lock are frozen by ice and snow due to cold weather, or when the door is stuck due to collision deformation, its ice-breaking mechanism can apply a torque to the ratchet, causing the ratchet to rotate in the reverse direction. Thus, during the reverse rotation of the ratchet, a thrust force pushing the lock catch towards the inside of the vehicle is formed, thereby overcoming the door opening resistance such as the weight of the door, the internal freezing resistance of the door lock, and the freezing resistance between the door and the vehicle body parts, and enabling the door to be broken and opened. The above ice-breaking method is to use the ratchet transmission chain of the door lock to open the frozen door, instead of using the ice-breaking ejector rod separately provided on the door to push against the vehicle body to achieve door ice-breaking opening. Since all moving parts are arranged inside the door, the noise generated during the ice-breaking process is small, and the safety hazard caused by the telescoping of the ejector rod at the inner panel of the door is eliminated, reducing the cost of the ice-breaking structure and not damaging the vehicle body paint surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the door lock capable of assisting in opening the door in the embodiment of the present invention when the ratchet is in the unlocking position;

[0033] Figure 2 is a schematic structural diagram of the door lock capable of assisting in opening the door in the embodiment of the present invention when the ratchet is in the locking position;

[0034] Figure 3 is an exploded view of the door lock capable of assisting in opening the door in the embodiment of the present invention.

[0035] In the figure:

[0036] 100, lock catch; 101, lock hole;

[0037] 1, lock housing; 11, avoidance hole;

[0038] 2. Ratchet; 21. Ratchet teeth; 22. Rim; 23. Recess; 24. Slot;

[0039] 3. Pawl;

[0040] 4. Buffer block;

[0041] 5. Rod pin;

[0042] 6. Torsion spring;

[0043] 7. Ice-breaking mechanism; 71. Ice-breaking wire; 72. Wheel rod; 73. Cam; 731. Insertion part; 732. Contact part; 733. Cam profile. Detailed implementation mode

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0045] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is lower than that of the second feature.

[0047] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of description and simplifying operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] This embodiment provides a car door lock that can assist in opening the door. The purpose of this car door lock is to open a frozen / stuck door by means of the ratchet drive chain of the original car door lock provided inside the car door, instead of pushing against the car body by an ice-breaking ejector rod separately provided on the car door to achieve ice-breaking opening of the door, thereby reducing the noise generated during ice-breaking opening of the door, eliminating potential safety hazards, and at the same time reducing the cost of the ice-breaking structure and not damaging the car body paint surface.

[0049] Based on the foregoing car door lock structure and in combination with Figures 1 to 3 As shown, this car door lock includes a lock case 1 fixedly provided inside the car door, and parts such as a ratchet 2, a pawl 3, and a buffer block 4 provided inside the lock case 1. Both the lock case 1 and the inner panel of the car door have avoidance holes 11 that can allow the ratchet 2 to directly cooperate with a lock catch 100 provided on the car body. The ratchet 2 is rotatably provided inside the lock case 1. Preferably, a buffer block 4 made of a non-rigid material such as rubber is provided on the rotation path of the ratchet 2 so that after the ratchet 2 rotates forward and backward, it can respectively abut against both ends of the buffer block 4, thereby enabling the ratchet 2 to obtain two limit positions, one being the locked position after forward rotation and the other being the unlocked position after reverse rotation.

[0050] When the ratchet 2 is in the locked position, the ratchet teeth 21 provided thereon can be inserted into a lock hole 101 formed on the lock catch 100 to catch the lock catch 100 and keep the car door in a closed state. When the ratchet 2 is in the unlocked position, the ratchet teeth 21 are removed from the lock hole 101 to release the lock catch 100, allowing the car door to be opened.

[0051] Please refer to Figure 1 and Figure 2 . The ratchet 2 is pivotally connected inside the lock case 1 in a rotatable manner by a rod pin 5. The ratchet 2 is recessed inward from its rim 22 to form a recess 23. The inner wall of the recess 23 is configured to guide the lock catch 100 into the recess 23 when the ratchet 2 rotates forward and guide the lock catch 100 out of the recess 23 when the ratchet 2 rotates backward.

[0052] That is, when the car door is opened, the ratchet 2 is in Figure 1The unlocking state shown, at this time the open end of the recess 23 is aligned with the above-mentioned avoidance hole 11. During the process of closing the car door, the car door moves towards the vehicle body, and the latch 100 moves towards the ratchet wheel 2 to first contact and push against the inner wall of the ratchet wheel 2, causing the ratchet wheel 2 to rotate forward, so that the ratchet teeth 21 gradually insert into the lock hole 101 of the latch 100. And as the ratchet wheel 2 rotates, the latch 100 is guided by the inner wall of the recess 23 to form a movement towards the inside of the ratchet wheel 2, that is, the side where the rod pin 5 is located. This movement roughly along the radial direction of the ratchet wheel 2 can be understood as to adapt to the gradually decreasing distance between the latch 100 and the ratchet wheel 2 during the closing process of the car door (conversely, it can adapt to the gradually increasing distance between the latch 100 and the ratchet wheel 2 during the opening process of the car door). When the car door is completely closed, the pawl 3 latches the ratchet wheel 2 that is exactly in the locked position, forming the locking of the car door.

[0053] When opening the car door, the above structure performs reverse actions, which will not be elaborated here. It is worth pointing out that the car door lock generally also includes a torsion spring 6 sleeved on the rod pin 5. The torsion spring 6 acts on the ratchet wheel 2 to store elastic potential energy during the forward rotation process of the ratchet wheel 2, and when the pawl 3 releases the ratchet wheel 2, it provides a restoring elastic force for the ratchet wheel 2 to return to the unlocked position. The restoring elastic force that the torsion spring 6 can provide is generally set to only be able to reset the unloaded ratchet wheel 2 to rotate back to the unlocked position to avoid the uncontrollable large-scale opening of the car door and ensure safety. Therefore, to open the car door, the occupant still needs to push / pull the car door outward from the vehicle body so that the latch 100 can drive the ratchet wheel 2 to reverse through the guiding of the above inner wall until the ratchet teeth 21 of the ratchet wheel 2 are completely removed from the lock hole 101, and then the car door can be completely opened.

[0054] In view of the above, when the car door and the car door lock are frozen by ice and snow due to cold weather, or the car door is stuck due to collision deformation, if the ratchet wheel 2 can obtain a torque to push against the latch 100 through the ratchet wheel 2, the car door can be opened by breaking the ice. Therefore, the car door lock provided in this embodiment further includes an ice-breaking mechanism 7 provided inside the car door. The ice-breaking mechanism 7 can apply a torque to the ratchet wheel 2 to make the ratchet wheel 2 rotate in the reverse direction. Thus, during the reverse rotation process of the ratchet wheel 2, a thrust force for pushing against the latch 100 towards the inside of the car is formed by means of the guiding action of the inner wall contour of the recess 23, thereby overcoming the resistance to opening the car door such as the weight of the car door, the internal freezing of the car door lock, the freezing between the car door and the vehicle body parts, and the jamming of the car door structure deformation, and enabling the car door to open.

[0055] The above ice-breaking method is to open the frozen / stuck car door by means of the transmission chain of the ratchet wheel 2 of the car door lock (that is, the transmission cooperation relationship between the ratchet wheel 2 and the latch 100), instead of the way of pushing against the vehicle body by an ice-breaking ejector rod mechanism separately provided on the car door. Since all the moving parts of this ice-breaking mechanism 7 are arranged inside the car door, the noise generated during the ice-breaking process is small, and the potential safety hazard caused by the telescopic movement of the ejector rod at the inner panel of the car door is eliminated, reducing the cost of the ice-breaking structure and not damaging the vehicle body paint.

[0056] The ice-breaking opening operation of the car door can be performed based on the following exemplary control method: A micro switch (not shown in the figure) can be set in the car door lock. Both the micro switch and the actuator are electrically connected to the vehicle control system, which is used to detect the rotation position of the ratchet wheel 2. When the ratchet tooth 21 releases the ratchet wheel 2, and the vehicle control system learns from the feedback signal of the micro switch that the ratchet wheel 2 has not rotated, it can be determined that the opening of the car door is blocked due to freezing or other reasons. Immediately, an ice-breaking operation instruction is sent to the ice-breaking mechanism 7, and the ice-breaking mechanism 7 applies a torque to the ratchet wheel 2 to perform the ice-breaking operation and open the car door.

[0057] Due to the limited thickness of the car door, it is not convenient to directly apply a torque to assist the reverse rotation based on the rotating shaft of the ratchet wheel 2. Therefore, in this embodiment, the above-mentioned ice-breaking mechanism 7 is preferably configured to apply a traction force to a part of the ratchet wheel 2 other than the rotating shaft to form a torque for the reverse rotation of the ratchet wheel 2. It can be understood that this traction force has at least a tangential component along the ratchet wheel 2.

[0058] To adapt to the change in the traction position of the ice-breaking mechanism 7 acting on the ratchet wheel 2 during the rotation of the ratchet wheel 2, the ice-breaking mechanism 7 preferably includes an actuator (not shown in the figure) and an ice-breaking cable 71. The actuator is fixed inside the car door, and the ice-breaking cable 71 is connected between the ratchet wheel 2 and the actuator. The actuator is configured to be able to pull or wind up the ice-breaking cable 71 so that when it works, it can pull the ice-breaking cable 71 and transmit the traction force to the ratchet wheel 2 through the ice-breaking cable 71, thereby driving the ratchet wheel 2 to rotate in the reverse direction.

[0059] To ensure that the operation of structures such as the ratchet wheel 2 during the normal opening and closing of the car door does not involve the ice-breaking mechanism 7, that is, the ice-breaking action of the ice-breaking mechanism 7 is independent of the normal opening and closing actions of the car door lock. In this embodiment, the ice-breaking mechanism 7 further includes a wheel rod 72, which is coaxially pivotally connected to the ratchet wheel 2 and connected to the ice-breaking cable 71, that is, an intermediate transmission structure is added between the ice-breaking cable 71 and the ratchet wheel 2. When the actuator pulls the wheel rod 72 through the ice-breaking cable 71, the wheel rod 72 can abut against the ratchet wheel 2 in the locked position after rotating a preset angle greater than 0, and drive the ratchet wheel 2 to rotate in the reverse direction to the unlocked position when continuing to rotate.

[0060] Specifically, the wheel rod 72 and the ratchet wheel 2 are jointly pivotally connected to the rod pin 5 so that both can rotate around the same rotating shaft. When the ratchet wheel 2 rotates between its locked position and the unlocked position, it does not contact the wheel rod 72, that is, it will not drive the wheel rod 72 to rotate. However, after the wheel rod 72 rotates the above-mentioned preset angle in the reverse rotation direction of the ratchet wheel 2, it can abut against the ratchet wheel 2, and then when continuing to rotate in this direction, it will drive the ratchet wheel 2 to rotate together to perform the ice-breaking operation of opening the car door.

[0061] The torsion spring 6 for resetting the ratchet 2 and holding it in the locked position as described above can be specifically set to be connected to the ratchet 2 and the wheel rod 72 at both ends respectively, so as to be able to reset the wheel rod 72. This is because the reset rotation direction of the ratchet 2 is the "reverse" as described above, that is Figure 1 and Figure 2 the counterclockwise direction in Figure 1 and Figure 2 , while the reset rotation direction of the wheel rod 72 is the "forward" as described above, that is

[0062] the counterclockwise direction in

[0063] and Figure 1 and Figure 2 . The reverse restoring elastic force inherent at both ends of the torsion spring 6 can correspondingly adapt to reset the ratchet 2 and the wheel rod 72 separately. To adapt to the asynchronous rotational movements of the ratchet 2 and the wheel rod 72, the ends of the torsion spring 6 can be connected to the two by non-rigid fixing methods such as plugging.

[0062] It can be understood that in order to be pushed and rotated by the wheel rod 72, at least one part protruding along the axial direction of the ratchet 2 is provided on the surface of the ratchet 2, and this part needs to be blocked on the rotation trajectory of the wheel rod 72. This part can be integrally formed on the ratchet 2, and preferably, this part can be an independent component that can be assembled with the ratchet 2, that is, another intermediate transmission structure is added between the ice-breaking wire 71 and the ratchet 2, so as to facilitate the preparation of each component.

[0063] As shown in Figure 1 and Figure 2 , the part protruding along the axial direction of the ratchet 2 can be a cam 73 pivotally connected to the ratchet 2 coaxially, and as shown in Figure 3 , the cam 73 can specifically include a plugging part 731 and an abutting part 732. Among them, the plugging part 731 is plugged and connected with the slot 24 provided on the ratchet 2, so that the cam 73 and the ratchet 2 are connected as a whole to rotate synchronously. The abutting part 732 is arranged on the rotation trajectory of the wheel rod 72, so that the wheel rod 72 can push against the cam 73 to rotate. The above-mentioned wheel rod 72, cam 73, etc. can all be made of metal parts such as steel to have sufficient structural strength during ice-breaking operations.

[0064] In addition to the microswitch described above, in order to facilitate the vehicle-mounted control system to determine that the door has completed ice-breaking opening, another microswitch (not shown in the figure) electrically connected to the vehicle-mounted control system can also be provided in the door lock. Correspondingly, the cam 73 also includes a cam profile 733, which can trigger the microswitch when the ratchet 2 is in the unlocked position. The vehicle-mounted control system can judge through this microswitch that the ratchet 2 synchronized with the rotation of the cam 73 has been driven by the ice-breaking mechanism 7 to the unlocked position, so as to stop the actuator and reset the actuator. At the same time, under the action of the torsion spring 6, the wheel rod 72 can be reset.

[0065] To adapt to the formation of the convex contour 733 with a specific shape so that the cam 73 can move a proper distance relative to the microswitch to trigger the contact of the microswitch, the part of the cam 73 for forming the convex contour 733 can be made of plastic. That is, the part of the cam 73 for forming the insertion part 731 and the abutting part 732 is a metal body, and the part for forming the convex contour 733 is a plastic body. During preparation, a metal body with regular and easy-to-form contours can be prepared in advance, and then the metal body is placed into a mold for forming the plastic body, and the plastic body is coated and formed on the metal body. Of course, in other alternative embodiments, the implementer can also use powder metallurgy or other methods to integrally form the cam 73 with the insertion part 731, the abutting part 732 and the convex contour 733, which is not limited herein.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A car door lock capable of assisting in opening the door, which can be fixed inside the car door. It includes a ratchet wheel (2), and the ratchet wheel (2) can rotate forward and backward to be in a locking position where it catches a latch (100) provided on the vehicle body of the car to close the door, or in an unlocking position where it releases the latch (100) to allow the door to open; Characterized in that: The car door lock further includes an ice-breaking mechanism (7) provided inside the car door, and the ice-breaking mechanism (7) can apply a torque to the ratchet wheel (2) to make the ratchet wheel (2) rotate backward and push against the latch (100) to open the door; The ice-breaking mechanism (7) is configured to apply a traction force to a part of the ratchet wheel (2) other than the rotating shaft to form the torque that makes the ratchet wheel (2) rotate backward; The ice-breaking mechanism (7) includes: An actuator fixed to the car door; and An ice-breaking cable (71) connected between the ratchet wheel (2) and the actuator to transmit the traction force to the ratchet wheel (2) when the actuator pulls the ice-breaking cable (71); The ice-breaking mechanism (7) further includes: A wheel rod (72) pivotally connected coaxially with the ratchet wheel (2) and connected to the ice-breaking cable (71). When the actuator pulls the wheel rod (72) through the ice-breaking cable (71), the wheel rod (72) can abut against the ratchet wheel (2) in the locking position after rotating a preset angle, and drive the ratchet wheel (2) to rotate backward to the unlocking position when continuing to rotate; The car door lock further includes: A torsion spring (6) configured to reset the ratchet wheel (2) and keep it in the locking position; The torsion spring (6) is sleeved on the rotating shaft of the ratchet wheel (2), and its two ends are respectively connected to the ratchet wheel (2) and the wheel rod (72) to be able to reset the wheel rod (72).

2. The car door lock capable of assisting in opening the door according to any one of claims 1, Characterized in that, The ice-breaking mechanism (7) further includes a cam (73) pivotally connected coaxially with the ratchet wheel (2), and the cam (73) includes: A plugging part (731) plugged and connected with the ratchet wheel (2) to make the cam (73) and the ratchet wheel (2) rotate synchronously; and An abutting part (732) arranged on the rotation track of the wheel rod (72) to make the wheel rod (72) able to push against the cam (73) to rotate.

3. The car door lock capable of assisting in opening the door according to claim 2, Characterized in that, The cam (73) further includes: A cam profile (733) that can trigger a micro switch when the ratchet wheel (2) is in the unlocking position, and the micro switch is electrically connected to the actuator.

4. The car door lock capable of assisting in opening the door according to claim 3, Characterized in that, The cam (73) includes: A metal body formed with the plugging part (731) and the abutting part (732); and A plastic body formed with the cam profile (733), and the plastic body is coated on the metal body.

5. The door lock capable of assisting in opening the door according to claim 1, characterized in that, the door lock further includes: a buffer block (4), which can respectively abut against both ends of the buffer block (4) when the ratchet wheel (2) is in the locking position and the unlocking position.

Images