Automatic mechanical unlocking device for automobile collision door lock

Abstract

The utility model discloses an automatic mechanical unlocking device for an automobile collision door lock, which relates to the field of automobile door locks, and comprises a fixed pipe fixedly arranged in a shell near the door lock and an inhaul cable connected to the unlocking end of a locking / unlocking mechanism in the door lock, the extension end of the inhaul cable penetrates through the fixed pipe and then is linked with a mass ball, and the mass ball is suspended. When the collision acceleration of the automobile is larger than or equal to 30 g, the mass ball swings and moves under the action of inertia load, and the locking / unlocking mechanism is pulled through the inhaul cable to be unlocked. When the collision acceleration of the automobile is larger than or equal to 30 g, the mass ball drives the locking / unlocking mechanism to conduct mechanical unlocking through the inhaul cable without electricity, and therefore the locking / unlocking mechanism can conduct mechanical automatic unlocking even if an electronic execution link is damaged in the collision process of the automobile. People can open the vehicle door for rescue at the first time.

Description

Technical Field

[0001] This utility model relates to the field of automotive door locks, and more specifically, to an automatic mechanical unlocking device for automotive collision door locks. Background Technology

[0002] With the development of new energy vehicles, whether car doors can be opened quickly after a collision has become a major concern for the public regarding vehicle safety.

[0003] All modern cars are equipped with locking / unlocking mechanisms, which are speed-sensitive automatic locking devices. When the car reaches a certain speed (usually set by the manufacturer, typically 10 km / h to 20 km / h), the car doors automatically lock to prevent accidental opening. Currently, unlocking of the locking / unlocking mechanism is controlled by the vehicle's computer or manually via switches on the center console or near the driver's seat. Once locked, the car door cannot be opened from the outside.

[0004] According to automotive passive safety regulations, the door locking system should meet the following collision performance requirements: 1. During a collision (duration ≥ 150ms), when the vehicle experiences an acceleration of 30g, the unlocked door locks should maintain their mechanical locking function to ensure that the door locks do not pop open; during a collision event (after the ECU detects a collision pulse signal and the airbag controller issues an unlocking signal), all door locks should execute an emergency unlocking procedure to ensure that occupants can open the doors without obstruction through the inner and outer handles within a certain range of operating force.

[0005] Therefore, whether the doors have been unlocked after a collision becomes a crucial safety feature for post-collision escape. If the driver and passengers are capable of movement after a collision, they can unlock the doors from inside the vehicle, allowing them to open normally; or the vehicle may have an automatic unlocking function after a collision, in which case the doors can be opened normally after the collision stops. However, because a car is a mechanical structure, there is a mechanism of collision energy transfer during a collision, causing various parts of the car to continuously deform and absorb the collision energy. In a frontal collision, it takes about 200ms for the car to come to a complete stop. Therefore, passenger cars are not allowed to be designed with a flat front; the front must protrude to absorb the energy transferred during a collision.

[0006] Existing automatic door unlocking functions in cars rely on electronic sensors sending collision signals. These sensors transmit the signals to the onboard computer, which then sends an unlocking command to the drive motor that powers the locking / unlocking mechanism. The motor then unlocks the door. The time from a collision to a complete stop is typically 200ms. The electronic sensor signal is sent within 20-50ms, the onboard computer takes another 20-30ms to process and send the command to the drive motor, and the drive motor takes 100-500ms to fully unlock the door. If, within 200ms of the collision, the car's power supply, the wiring connecting the electronic sensors to the onboard computer, or the wiring connecting the onboard computer to the drive motor are damaged, the drive motor will not start, and the locking / unlocking mechanism will fail to unlock electrically. This type of accident occurred after a collision with a Seres New Energy M7, where a broken wiring connecting the drive motor caused the electronic unlocking to fail. Since the driver was unconscious and unable to unlock the door manually, rescuers could not open the door, resulting in injuries.

[0007] The existing electronic automatic unlocking function for car collisions has the following shortcomings: 1. The time from the start to the end of a car collision is 200ms, and it takes about 100ms to damage the locking / unlocking electronic system. The time of damage is shorter than the time of 150ms to 550ms from the time the electronic sensor sends a collision signal to the time the motor mechanism drives the locking / unlocking mechanism in the door lock to unlock. During this period, if the collision just happens to cut off any part of the electronic execution link, the unlocking of the locking / unlocking mechanism will stop before it is completed. At the same time, there are currently no standards, domestic or international, to specify the time from the time the collision signal is sent to the time the motor mechanism drives the locking / unlocking mechanism to unlock. However, if it is to be set to unlock within half the time (100ms) from the start to the end of the car collision to avoid damage to the electronic motor system of the electric unlocking, there will be a contradiction between motor miniaturization and response speed. If the response speed is increased, the motor power will increase, resulting in a larger motor size, which makes it difficult to install electric door locks, increases costs, and also poses a risk of unlocking failure. Utility Model Content

[0008] The purpose of this utility model is to provide an automatic mechanical unlocker for car door locks in the event of a collision, so that when a car collision reaches an acceleration of 30g, the locking / unlocking mechanism does not require electricity to unlock. This allows the locking / unlocking mechanism to be automatically unlocked by the automatic mechanical unlocker even if the electronic actuator is damaged during the collision, so that people can open the car door immediately to carry out rescue.

[0009] To achieve the purpose of this utility model, the technical solution adopted is as follows: an automatic mechanical unlocker for car collision door locks. When in use, it is installed near the door lock and includes a fixed tube for fixed installation and a first pull cable connected to the unlocking end of the locking / unlocking mechanism in the door lock. The extension end of the first pull cable passes through the fixed tube and is connected to a mass ball. The mass ball is suspended. When the car collision acceleration is greater than or equal to 30g, the mass ball swings and moves under the action of inertial load, and unlocks the door lock by pulling the locking / unlocking mechanism in the door lock through the first pull cable.

[0010] Furthermore, it also includes a housing fixed near the door lock, the housing including a base plate for mounting and a housing cover fixed on the base plate, and a fixing tube fixed on the base plate, one end of the fixing tube extending outward through the housing cover, and the first pull cable extending through the fixing tube to the inside and outside of the housing.

[0011] Furthermore, the inner end of the fixing tube extends into the housing and is inclined at 30° to 60° along the X-axis, Y-axis and Z-axis of the vehicle.

[0012] Furthermore, the bent end of the fixed tube is fixed with a stretchable and bendable elastic tube, and the mass ball is in a taut state by the first elastic index through the stretching elasticity of the elastic tube and is suspended against the elastic tube.

[0013] Furthermore, the elastic tube can be a tubular spring or an elastic hose. When the car collision acceleration is greater than or equal to 30g, the mass ball swings and moves under the action of inertial load, causing the elastic tube to become unstable. The mass ball moves rapidly, pulling the first cable to generate the unlocking stroke and force.

[0014] Furthermore, it also includes a tension and stroke amplifier, which includes a latch A and a latch B installed near the door lock. The latch A and latch B engage with each other. The tension and stroke amplifier also includes a first elastic element installed near the door lock. The latch A is connected to the first elastic element and a first cable. The latch B is also connected to a second cable and a second elastic element. The other end of the second elastic element is installed near the door lock. The other end of the second cable is connected to the unlocking end of the locking / unlocking mechanism in the door lock.

[0015] Furthermore, when the collision acceleration of the vehicle is greater than or equal to 30g, the mass ball swings and moves under the action of inertial load, and the stroke size and force of the first cable pulling the lock A and the first elastic element to disengage the lock A from the lock B are less than the stroke size and force of the second elastic element pulling the lock B and the second cable after the lock B disengages from the lock A.

[0016] Furthermore, when the car collision acceleration is greater than or equal to 30g, the mass ball swings and moves under the inertial load, driving the first cable. After offsetting the elastic force of the elastic tube, the tension of the first cable is greater than the elastic force of the locking / unlocking mechanism at the unlocking end of the locking / unlocking mechanism in the door lock connected by the second cable, thus driving the locking / unlocking mechanism in the door lock to unlock; or the torque formed by the tension of the first cable and the latch A after offsetting the elastic force of the elastic tube is greater than the torque formed by the elastic force of the first elastic element and the latch A, driving the latch A to separate from the latch B. The latch B rotates and pulls the locking / unlocking mechanism to unlock through the second cable.

[0017] The beneficial effects of this utility model are:

[0018] 1. In this utility model, the swinging of the mass ball generated by the car collision pulls the locking / unlocking mechanism in the door lock to move in the unlocking direction, thereby realizing the automatic mechanical unlocking of the locking / unlocking mechanism. The entire unlocking process does not require the use of electricity, so that even if the electronic actuator is damaged during the car collision, the locking / unlocking mechanism can still be mechanically unlocked automatically, allowing people to open the car door and carry out rescue immediately.

[0019] 2. In this utility model, the collision of the car and the swing of the mass ball occur simultaneously, which can prevent the door lock and related components from being damaged by the collision before the door is unlocked. The response time is less than 50ms, which is a significant improvement over the existing electronic unlocking methods, ensuring the timely unlocking of the locking / unlocking mechanism. At the same time, the structure is compact and has strong impact resistance.

[0020] 3. When this utility model automatically unlocks after a collision, it does not need to be returned to a repair shop to replace parts; it can be used again simply by pulling the reset button.

[0021] 4. In terms of safety enhancement, this utility model provides automatic mechanical unlocking backup when the electronic system fails, breaking through the bottleneck of the "200ms collision window" time limit; in terms of cost optimization, it eliminates the need for high-power motors and simplifies wiring harness layout; in terms of regulatory compatibility, it meets the 30g acceleration triggering requirement and achieves unlocking immediately after the collision ends (without waiting for ECU signals and motor operation).

[0022] 5. This utility model simplifies the structure of the automatic unlocking system, reduces manufacturing and installation costs, and improves the security and reliability of automatic unlocking. Attached Figure Description

[0023] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0024] Figure 1This is a front view of the automatic mechanical unlocker for car door locks provided in Embodiment 2 (with tension and stroke increasers).

[0025] Figure 2 This is a top-down schematic diagram of the automatic mechanical unlocking device for car collision door locks provided in Example 1 (without tension and stroke extenders).

[0026] The attached diagram shows the markings and corresponding component names:

[0027] 1. Door lock, 2. First pull cable, 3. Outer shell, 4. Fixing tube, 5. Elastic tube, 6. Mass ball, 7. Lock A, 8. Lock B, 9. First elastic element, 10. Second elastic element, 11. Second pull cable, 12. Elastic element, 13. Return pull cable, 3.1. Base plate, 3.2. Shell cover. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0029] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] like Figure 1 , Figure 2 As shown, the automatic mechanical unlocking device for car collision door locks provided by this utility model includes a first cable 2, a mass ball 6, and a housing 3. The housing 3 includes a base plate 3.1 and a cover 3.2 for the mass ball 6 to swing. The cover 3.2 is a cylindrical shape with one end open, and the base plate 3.1 and the cover 3.2 are an integral sealed structure. The length direction of the cover 3.2 is consistent with the thickness direction of the car door. The base plate 3.1 closes the open end of the cover 3.2. When the housing 3 needs to be installed, the base plate 3.1 is fixed near the door lock with screws.

[0032] During installation, the base plate 3.1 is fixed near the door lock using screws or other means. The base plate 3.1 has a fixing tube 4, one end of which is located outside the housing 3.2, and the other end inside the housing 3.2. The end of the fixing tube 4 extending into the housing 3.2 is inclined at 30° to 60° along the X, Y, and Z axes of the vehicle. During installation, the first pull cable 2 passes through the fixing tube 4. One end of the first pull cable 2 extends into the housing 3.2 and is fitted with a mass ball 6. The other end of the first pull cable 2 is connected to the unlocking end of the locking / unlocking mechanism in the door lock 1, and the mass ball 6 is elastically pressed against the fixing tube 4 by the first pull cable 2, thus suspending itself.

[0033] When the car's collision acceleration reaches 30g, the mass ball 6 swings and moves under the action of inertial load, pulling the first cable 2 and causing the unlocking end of the locking / unlocking mechanism in the door lock 1 to move, thus achieving automatic unlocking. Since the fixing tube 4 is inclined and bent at 30° to 60° along the X-axis, Y-axis and Z-axis of the car inside the housing 3.2, and preferably at 45°, the suspended mass ball 6 will pull the first cable 2 when it is hit from any direction.

[0034] To prevent the unlocking end of the locking / unlocking mechanism in the door lock 1 from being accidentally pulled during driving or braking, the diameter and material specific gravity of the mass ball 6, as well as the elasticity of related parts such as the rebound force of the unlocking end in the locking / unlocking mechanism when the mass ball 6 is connected to the first cable 2 and pressed against the bent end of the fixed tube 4, can be determined by configuring an elastic element 12 on the first cable 2, or by selecting a section to replace it with an elastic element. In this case, the elasticity of the elastic element can prevent the mass ball 6 from swinging and moving when the collision acceleration is less than 30g, and will not accidentally trigger the unlocking end of the locking / unlocking mechanism through the first cable 2. At the same time, it can ensure that the mass ball 6 can offset the elasticity of the elastic element under the swinging and moving of the inertial load generated by the collision acceleration greater than or equal to 30g, so that the unlocking end in the locking / unlocking mechanism in the door lock 1 can be unlocked by pulling the first cable 2.

[0035] In this embodiment, by setting a shell 3 outside the mass ball 6, it can be effectively ensured that the swing of the mass ball 6 near the door lock is not affected by other structures. When designing the size of the shell 3, the diameter and length of the shell 3 must meet the requirements that the swing or movement stroke of the mass ball 6 is suitable for the unlocking stroke, so that the car is restricted to swinging fully within the shell 3 during driving, braking and collision, and the mass ball 6 is prevented from hitting other structures during the swing.

[0036] In order to make the mass ball 6 more likely to swing and move in any direction, and to prevent the mass ball 6 from swinging and hitting the outer shell 3 when the car does not collide or the acceleration is less than 30g, which would cause the unlocking end of the locking / unlocking mechanism to be accidentally triggered, an elastic tube 5 can be sleeved on the first cable 2, and one end of the elastic tube 5 can be fixed to the bent end of the fixed tube 4. At this time, in addition to being elastically pulled by the elastic element on the first cable 2, the mass ball 6 can also be kept in a taut state and pressed against the elastic tube 5 in a suspended state by the extensibility of the elastic tube 5. When the car collision acceleration is greater than or equal to 30g, the swinging and movement of the mass ball 6 under the action of inertial load causes the elastic tube 5 to become unstable. The mass ball 6 moves rapidly, pulling the first cable 2 to generate the unlocking stroke and force. This ensures that when the car does not collide and the collision acceleration is less than 30g, the mass ball 6 can swing normally without triggering the unlocking due to insufficient instability of the elastic tube 5. At the same time, when the car collision acceleration is greater than or equal to 30g, the inertial force generated by the swinging of the mass ball 6 and the stroke of pulling the first cable 2 cause the elastic tube 5 to become unstable, which is sufficient to pull the unlocking end of the locking / unlocking mechanism in the door lock 1 to unlock.

[0037] In this embodiment, the elastic tube 5 can be a spring tube or a non-metallic flexible tube. In this embodiment, the elastic tube 5 is fixed to the fixed tube 4 by directly inserting one end of the elastic tube 5 into the fixed tube 4 or by sleeve-attaching it onto the fixed tube 4. In this embodiment, the parameters for the instability of the elastic tube 5 are matched with the inertial load force generated by the mass ball 6 when the acceleration generated by the car collision is greater than or equal to 30g. This allows the elastic tube 5 to become unstable and sway in the direction of the collision, guiding the mass ball 6 to pull the first cable 2 in the direction of the collision, thereby driving the unlocking end of the locking / unlocking mechanism in the door lock 1 to unlock.

[0038] In this embodiment, the specific gravity and diameter of the mass ball 6 can be adjusted according to actual needs, provided that the swing of the mass ball 6 can automatically unlock the door lock 1 when the car collision acceleration is greater than or equal to 30g, or that the swing of the mass ball 6 can trigger the unlocking end of the locking / unlocking mechanism in the door lock 1 to unlock it.

[0039] In this embodiment, when the first zipper 2 is not equipped with an elastic element 12 and the elastic tube 5 is only sleeved on the first cable 2, when the car collision acceleration is greater than or equal to 30g, the mass ball 6 swings and moves under the inertial load to drive the first cable 2. At this time, the tension of the mass ball 6 acting on the first cable 2 counteracts the elastic force of the elastic tube 5. If the elastic element 12 is installed, the tension after the elastic element 12 is counteracted should also be greater than the elastic force of the locking / unlocking mechanism at the unlocking end of the locking / unlocking mechanism in the door lock 1 connected to the first cable 2, so as to drive the locking / unlocking mechanism in the door lock 1 to unlock.

[0040] Example 2

[0041] To make the automatic mechanical unlocking device for car collision door locks smaller, the automatic mechanical unlocking device for car collision door locks provided in this embodiment 2, based on embodiment 1, has a tension and stroke amplifier set near the door lock. When the mass ball 6 has a small diameter and a small stroke under the collision with the car, it can trigger the tension and stroke amplifier by obtaining a small inertial load and a small stroke after the collision. Then, the increased stroke and force of the tension and stroke amplifier control the locking / unlocking mechanism in the door lock 1 to unlock.

[0042] Specifically, the tension and stroke amplifier is located inside the door between the outer shell 3 and the door lock 1. The tension and stroke amplifier includes a latch A7 and a latch B8 hinged inside the door. A first elastic element 9 is also installed inside the door and connected to the latch A7. The latch A7 is also connected to the first cable 2. A second elastic element 10 is also installed inside the door and connected to the latch B8. A second cable 11 is connected to the latch B8. The other end of the second cable 11 is connected to the unlocking end of the locking / unlocking mechanism in the door lock (1).

[0043] By installing the first elastic element 9 near the door lock, the latch A7 can be effectively prevented from easily separating from the latch B8 due to vehicle vibration. At this time, the elastic force applied by the first elastic element 9 is opposite to the tension applied by the first cable 2. When the vehicle is driving, braking or colliding with an acceleration of less than 30g, the tension of the first cable 2 pulling the latch A7 is insufficient to change the first elastic element 9, thereby preventing the latch A7 from separating from the latch B8 in this situation, preventing the locking / unlocking mechanism 1 from being mis-locked, and ensuring the accuracy of the device's response.

[0044] To make the design smaller and easier to install near the door lock, the size of the mass ball and the stroke of the mass ball's swing and displacement pulling the first cable 2 are reduced. Therefore, a force and stroke amplifier is added to this design. A small stroke and force trigger a large stroke and force to unlock the locking / unlocking mechanism. In this design, the stroke and force of the first cable 2 pulling the latch A7 and the first elastic element 9 to disengage from the latch B8 are less than the stroke and force of the latch B8 and the second elastic element 10 pulling the second cable 11 after disengaging from the latch A7.

[0045] In this embodiment, the principle of increasing the pull distance has two aspects. From the perspective of stroke: for the first cable 2 connected to the latch A7, when it pulls the latch A7 from rest to the point where the latch B8 disengages, the displacement distance of the pulling point of the first cable 2 should be less than the displacement distance of the latch B8 in the pulling direction of the second cable 11 during the process of the latch B8 being driven to rotate by the second elastic element 10 after disengaging from the latch A7. From the perspective of pulling force: by pulling the first cable 2, the first cable 2 drives the first elastic element 9 connected to the latch A7 from a rest state to the point where the latch A7 disengages from the latch B8. The pulling force of the first cable 2 should be less than the pulling force of the second cable 11 in the pulling direction of the latch B8 during the process of the latch B8 being driven to rotate by the second elastic element 10 after disengaging from the latch A7. This is the design principle of the tension and stroke amplifier, which is to achieve a large stroke and large unlocking driving force by using a small inertial load and small stroke to drive the first cable 2 to pull the latch A7 to trigger the latch B8 to disengage after the second elastic element 10 drives the latch B8 to rotate and pull the second cable 11. This makes the automatic mechanical unlocker of the car collision door lock smaller and easier to install.

[0046] In this embodiment, in order to reduce the size of the automatic mechanical unlocker for car collision door locks, the tension and stroke amplifiers can also be arranged on the base plate 3.1.

[0047] In this embodiment, the elastic traction of the first cable 2 mainly refers to the elastic force exerted on the first cable 2 by the elastic tube 5 when it is not pulled by the inertial load of the mass ball 6, the elastic force exerted on the first cable 2 by the elastic element 12, the elastic force at the unlocking end of the locking / unlocking mechanism in the door lock 1, and the elastic force generated by the first cable 2 pulling the latch A7 connected to the first elastic element 9. These elastic forces satisfy both the requirement that the mass ball 6 is pressed against the elastic tube 5 and the requirement that when the mass ball 6 does not reach the collision safety standard acceleration of 30g, the tension on the first cable 2 is insufficient to change the locking / unlocking mechanism from the locked state to the unlocked state. If the mass ball 6 reaches the collision safety standard acceleration of 30g, then the tension on the first cable 2, after offsetting the elastic traction force, should change the locking / unlocking mechanism from the locked state to the unlocked state.

[0048] When the car collision acceleration is greater than or equal to 30g, the mass ball swings and moves under the inertial load, driving the first cable. The tension of the first cable cancels the elastic force of the elastic tube and the torque formed with the latch A is greater than the torque formed by the elastic force of the first elastic element and the latch A, driving the latch A to separate from the latch B. The latch B rotates and unlocks through the second cable pulling the locking / unlocking mechanism.

[0049] In this embodiment, in order to ensure that the automatic mechanical unlocker of the car collision door lock can be reset and reused after being triggered, a return cable 13 can be installed near the door lock and connected to the latch B8. Pulling the return cable 13 can restore the tension and stroke increaser functions.

[0050] In this embodiment, the elastic element can be a tension spring or a rubber band, etc., and the first elastic element 9, the second elastic element 10 and the return cable 13 can be one of a tension spring, a compression spring, or a rubber band.

[0051] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. An automatic mechanical unlocking device for car door locks in the event of a collision, characterized in that, It includes a fixed tube (4) that is fixedly installed and a first cable (2) connected to the unlocking end of the locking / unlocking mechanism in the door lock (1). The extension end of the first cable (2) passes through the fixed tube (4) and is connected to a mass ball (6). The mass ball (6) is suspended. When the car is subjected to an impact acceleration of 30g or more, the mass ball (6) swings and moves under the action of inertial load and unlocks the locking / unlocking mechanism in the door lock (1) by pulling the first cable (2).

2. The automatic mechanical unlocking device for automotive door locks according to claim 1, characterized in that, It also includes a housing (3) fixed near the door lock (1). The housing (3) includes a base plate (3.1) for installation and a housing cover (3.2) fixed on the base plate (3.1). A fixing tube (4) is fixed on the base plate (3.1). One end of the fixing tube (4) extends outward through the housing cover (3.2), and a first pull cable (2) extends through the fixing tube (4) and then extends to the inside and outside of the housing (3).

3. The automatic mechanical unlocking device for automobile collision door locks according to claim 2, characterized in that, The inner end of the fixed tube (4) extends into the housing (3.2) and is inclined at 30° to 60° along the X-axis, Y-axis and Z-axis of the vehicle.

4. The automatic mechanical unlocking device for automotive collision door locks according to claim 1, 2, or 3, characterized in that, The bent end of the fixed tube (4) is fixed with a retractable and bendable elastic tube (5). The mass ball (6) is elastically pulled by the first cable (2) through the elastic tube (5) and is in a tensile state and is suspended against the elastic tube (5).

5. The automatic mechanical unlocking device for automotive door locks according to claim 4, characterized in that, The elastic tube (5) is a spring tube or an elastic flexible tube.

6. The automatic mechanical unlocking device for automotive door locks according to claim 1, characterized in that, It also includes a tension and stroke amplifier, which includes a latch A (7) and a latch B (8) installed near the door lock (1). The latch A (7) and the latch B (8) engage with each other. The tension and stroke amplifier also includes a first elastic element (9) installed near the door lock (1). The latch A (7) is connected to the first elastic element (9) and the first cable (2). The latch B (8) is also connected to a second cable (11) and a second elastic element (10). The other end of the second elastic element (10) is installed near the door lock (1). The other end of the second cable (11) is connected to the unlocking end of the locking / unlocking mechanism in the door lock (1).

7. The automatic mechanical unlocking device for automotive door locks according to claim 6, characterized in that, When the collision acceleration of the car is greater than or equal to 30g, the mass ball (6) swings and moves under the action of inertial load, and pulls the latch A (7) and the first elastic element (9) through the first cable (2) to make the latch A (7) disengage from the latch B (8) by a stroke dimension and force that is less than the stroke dimension and force of the second elastic element (10) pulling the latch B (8) and the second cable (11) after the latch B (8) disengages from the latch A (7).

8. The automatic mechanical unlocking device for automotive collision door locks according to claim 6, characterized in that, When the car collision acceleration is greater than or equal to 30g, the mass ball (6) swings and moves under the inertial load, driving the first cable (2) to counteract the elastic force of the elastic tube (5). The tension of the first cable (2) is greater than the elastic force of the locking / unlocking mechanism at the unlocking end of the locking / unlocking mechanism in the door lock (1) connected by the second cable (11), driving the locking / unlocking mechanism in the door lock (1) to unlock; or the torque formed by the tension of the first cable (2) and the latch A (7) after counteracting the elastic force of the elastic tube (5) is greater than the torque formed by the elastic force of the first elastic element (9) and the latch A (7), driving the latch A (7) to separate from the latch B (8). The latch B (8) rotates and pulls the locking / unlocking mechanism to unlock through the second cable (11).

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