A vehicle door arrangement with automatic unlocking on impact

Abstract

This invention belongs to the field of emergency door opening technology for automobiles, specifically relating to an automatic door unlocking mechanism after a vehicle collision. This invention uses an inertial switch to sense impact acceleration and control the on / off state of the explosive bolt ignition circuit; uses the explosive bolt as the main connecting component between the door lock hook and the door frame structure; uses a retractor structure with automatic locking function and a fabric strip as auxiliary connecting components between the door lock hook and the door frame structure; uses the vehicle's power supply as the main power source for the explosive bolt ignition; uses a capacitor as the auxiliary power source for the explosive bolt ignition; and uses the vehicle's power supply as the charging power source for the capacitor. When the inertial switch senses an impact acceleration peak greater than a threshold, the inertial switch is activated, and the current from the vehicle's power supply or the capacitor discharges through the explosive bolt circuit, causing the explosive bolt detonation structure to disconnect, breaking the connection between the door lock hook and the door frame; when the door opens and the door lock hook moves too fast, the retractor automatically locks the fabric strip to prevent the door from opening rapidly. Compared to existing automatic door unlocking mechanisms after a collision, this method has advantages such as high reliability, low modification costs, and strong survivability.

Description

Technical Field

[0001] This invention belongs to the field of emergency door opening technology for automobiles, specifically relating to an automatic door unlocking mechanism after a vehicle collision. Background Technology

[0002] Whether a car door can unlock normally after a collision is a crucial function for the safety of occupants, especially in the event of a fire following a collision. The ability of external rescue personnel to open the doors immediately when occupants are incapacitated can determine their survival. Current automatic door unlocking methods mostly rely on the vehicle's infotainment system sensing the impact (such as the deployment of combined airbags) to automatically unlock the doors. However, due to the complexity of the infotainment system and door locks, they are susceptible to failure in the event of a collision, leading to unpredictable door unlocking and causing numerous tragedies. Currently, there is no publicly available, highly effective, and safe automatic door unlocking system for collisions, either domestically or internationally. Summary of the Invention

[0003] The purpose of this invention is to propose a collision-automatic unlocking car door device that directly disengages the door lock hook after a collision, thus achieving double protection with the vehicle's automatic unlocking system and improving vehicle safety.

[0004] The technical solution of this invention is: a collision-automatic unlocking car door device, which uses an inertial switch to sense impact acceleration and control the on / off state of the explosive bolt ignition circuit; uses the explosive bolt as the main connecting component between the door lock hook and the door frame structure; uses a retractor structure with automatic locking function and a fabric strip as auxiliary connecting components between the door lock hook and the door frame structure; uses the car power supply as the main power supply for the explosive bolt ignition; uses a capacitor as the auxiliary power supply for the explosive bolt ignition; and uses the car power supply as the charging power supply for the capacitor. When the inertial switch senses an impact acceleration peak greater than a threshold, the inertial switch is activated, and the current from the car power supply or capacitor discharge flows through the explosive bolt circuit, causing the explosive bolt detonation structure to disconnect, thus breaking the connection between the door lock hook and the door frame; when the door opens and the speed of movement of the door lock hook is too high, the retractor automatically locks the fabric strip to prevent the door from opening rapidly, thereby keeping the door locked even if the vehicle rolls over or undergoes other dangerous displacement after a collision; when the speed of movement of the door lock hook is low, the retractor will release the fabric strip normally, allowing the door to open normally.

[0005] The inertial switch is a universal inertial switch, which automatically connects the ignition circuit of the explosive bolt when the peak impact acceleration is greater than the threshold.

[0006] The explosive bolt uses an electric detonation triggering mechanism and is connected to an easily accessible fuse in the ignition circuit. The fuse is disconnected during vehicle maintenance and bolt replacement to avoid accidental triggering of the explosive bolt.

[0007] The beneficial effects of this invention are as follows: The collision-automatic unlocking car door device of this invention uses an inertial switch to sense impact acceleration and control the on / off state of the explosive bolt ignition circuit; it uses the explosive bolt as the main connecting component between the door lock hook and the door frame structure; it uses a retractor structure with automatic locking function and a fabric strip as auxiliary connecting components between the door lock hook and the door frame structure; it uses the car's power supply as the main power source for the explosive bolt ignition; it uses a capacitor as the auxiliary power source for the explosive bolt ignition; and it uses the car's power supply as the charging power source for the capacitor. Compared with the automatic unlocking systems currently installed in cars, this system has a simple and reliable structure, low cost, easy maintenance, and easy installation, and can significantly improve vehicle safety. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 Schematic diagram of automatic unlocking upon collision. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0011] The collision-automatic unlocking vehicle door device of the present invention is used to realize the function of automatically unlocking the door after a vehicle collision, and is described as follows: like Figure 1 As shown, the device includes: Power interface, capacitor, protective resistor, fuse, inertial switch, explosion bolt, door lock hook, retractor, fabric tape.

[0012] 2) The power interface is used to connect to the car's power supply; 3) The capacitor is in a charging state when the car power supply is on, and in a discharging state when the car power supply is disconnected and the ignition circuit is turned on. 4) Fuse resistor 1 is connected in the capacitor charging circuit to prevent short circuits caused by capacitor failure; 5) Fuse resistor 2 is connected in the ignition circuit and installed in an easily accessible location. When performing car maintenance and replacing the explosion bolts, remove the fuse to prevent the explosion bolts from being accidentally triggered. 6) The inertia switch is installed on the main structure of the car. When a vehicle collision occurs, it connects the ignition circuit when it senses an acceleration in any direction that is greater than a threshold (e.g., the vehicle's rearward acceleration is greater than 18G). 7) When the ignition circuit is turned on, the two explosion bolts that serve as the connecting parts between the door lock hook and the door frame structure are triggered, causing the door lock hook to detach from the door frame; 8) The fabric strip is attached to the back of the door lock hook. When the fabric strip is pulled out quickly (which occurs after the explosive bolts detonate and the door opens rapidly due to vehicle rollover or other reasons), the retractor locks the fabric strip to prevent the door from opening rapidly. 9) When the fabric belt is pulled out at normal speed, the retractor releases the fabric belt, allowing the door to open normally. The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A collision-automatic unlocking device for automobile doors, characterized in that, include: Power interface, capacitor, protective resistor, fuse, inertial switch, explosion bolt, door lock hook, retractor, fabric tape; An inertial switch is used to sense impact acceleration and control the on / off state of the explosive bolt ignition circuit; explosive bolts are used as the main connecting parts between the door lock hook and the door frame structure; a retractor structure with automatic locking function and fabric tape are used as auxiliary connecting parts between the door lock hook and the door frame structure; the automotive power supply is used as the main power supply for explosive bolt ignition; a capacitor is used as the auxiliary power supply for explosive bolt ignition; and the automotive power supply is used as the charging power supply for the capacitor. The inertial switch is installed on the main structure of the car. When the inertial switch senses that the peak impact acceleration is greater than the threshold, the inertial switch is turned on. The current of the car power supply or capacitor discharge passes through the explosive bolt circuit, the explosive bolt detonation structure is disconnected, and the connection between the door lock hook and the door frame is broken, so as to realize automatic unlocking after collision. Similar to the principle of seat belt retractors, after the main connecting part of the door lock hook and the door frame structure is disconnected, when the door is opened and the door lock hook moves at a high speed, the retractor will automatically lock the fabric belt to prevent the door from opening rapidly, so that the door will still be locked when the vehicle rolls or undergoes other dangerous displacement after a collision. After the main connecting parts of the door lock hook and the door frame structure are disconnected, when the door is opened and the speed of the door lock hook movement is slow, the retractor will release the fabric belt normally, allowing the door to open normally. The explosive bolt uses an electric detonation triggering mechanism and is connected to an easily accessible fuse in the ignition circuit. The fuse is disconnected during vehicle maintenance and bolt replacement to avoid accidental triggering of the explosive bolt.

2. The inertial switch according to claim 1, characterized in that, Use a universal inertial switch.

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