Pneumatic vehicle safety catch

Abstract

The utility model discloses a pneumatic type car safety lock catch belongs to car lock technical field, its structure includes battery, electric wire, air compressor, air tank, electric valve or solenoid valve, lock catch storehouse cavity, fork type lock catch, positive pressure spring and button, fixedly installed in the door frame inside of car, the straight lock column of fork type lock catch projects in the outside of door frame, when car starts, the air of predetermined air pressure value is kept in air tank all the time, the collision sensor on car detects the collision information that vehicle receives, and the information is delivered to the electronic control unit of car, and the electronic control unit sends the opening signal of electric valve or solenoid valve on the air outlet pipe, or presses the button, makes the circuit connection, will make electric valve or solenoid valve open, and the gas in air tank enters lock catch storehouse cavity along the air outlet pipe, and the pressure of the front of lock tail plate rises, thereby pushes the lock tail plate of fork type lock catch and moves back, makes the straight lock column retract in lock catch storehouse cavity, and the straight lock column and lock bolt are separated from contact, and make the door open.

Description

Technical Field

[0001] This utility model relates to a pneumatic car safety latch, belonging to the field of automotive lock technology, and in particular to a car door lock latch technology that can automatically unlock when a car is involved in a collision. Background Technology

[0002] Car door locks, such as Figure 5 As shown: It typically consists of a lock body and a latch. The lock body includes a lock cylinder and a bolt, and is fixedly installed on the car door. It connects to the inner and outer handles via a lever. The latch, as shown... Figure 6 As shown: Also called a lock pin or door stop, it includes a U-shaped lock pin and a lock tail plate. The U-shaped lock pin and the lock tail plate are fixedly connected, forming a gap in the middle. It is fixedly installed on the door frame of the car, opposite to the lock body. When the car door is closed, the lock tongue is locked in the gap of the lock latch, thus locking the car door.

[0003] The shortcomings of existing car door lock latch technology:

[0004] The latch is fixedly installed on the car door frame and cannot be moved. In the event of a collision or a door lock malfunction that prevents the door from being opened, neither the people inside the car nor the rescue personnel outside can open the door by moving the latch. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pneumatic car safety latch. This device can open the car door by moving the latch when a collision occurs or the door lock malfunctions and cannot be opened.

[0006] The technical solution of this utility model to solve the above problems is: a pneumatic car safety lock, the structure of which includes a battery, wires, an air compressor, an air tank, an electric valve or a solenoid valve, a lock chamber, a fork-type lock, a positive pressure spring, and a button; the lock chamber includes a front cover plate, a rear cover plate, and a housing, the front cover plate has one or two front through holes in the middle, two to five connecting through holes on the outside of the front through holes, and two to four external through holes on the outside of the connecting through holes, the front cover plate is connected to the car body by a screw rod passing through the external through holes. The door frame is fixedly connected to the side near the door. A screw rod passes through the connecting through hole in the front cover plate and connects to the internal threaded hole on the front side of the housing. A boss with a width of 3 mm to 20 mm and a height of 3 mm to 10 mm is provided along the inner wall of the front part of the housing. A rear through hole is provided in the middle of the rear cover plate, and two to five connecting through holes are provided on the outer side of the rear through hole. The screw rod passes through the connecting through hole in the rear cover plate and connects to the internal threaded hole on the rear side of the housing. The fork-type latch includes a straight locking pin, a ring-shaped pin cap, and a lock tail plate. The straight locking pin is one or two straight cylinders. The rear of the locking pin is fixedly connected to the front of the locking tailplate. The locking tailplate is located inside the latch chamber. At the rear of the boss, the straight locking pin of the fork-type latch protrudes from the front through hole of the front cover plate and onto the outside of the door frame, opposite to the lock body on the door. The circular pin cap is fitted onto the straight locking pin. A pressure spring is installed between the rear of the locking tailplate and the rear cover plate. The air compressor outlet is connected to the air tank through the air inlet pipe. The air tank outlet is connected to the housing between the front cover plate and the locking tailplate at the front of the latch chamber through the air outlet pipe. An electric valve or solenoid valve is installed on the air outlet pipe. A pressure switch is installed on the air tank. The air compressor is connected to the pressure switch through a wire. The pressure switch is connected to the battery electrode through a wire. The electric valve or solenoid valve is connected to one electrode of the battery through one wire and to the vehicle's electronic control unit through another wire. The vehicle's collision sensor is connected to the electronic control unit through a wire. The button and electronic control unit are connected to the other electrode of the battery through a wire. The battery, air compressor, and air tank are installed on the vehicle chassis.

[0007] Its beneficial effects are:

[0008] This utility model of a pneumatic car safety lock is installed on the door frame of a car, with the straight locking pin protruding outside the door frame. When the car is started, the air tank maintains a predetermined air pressure value. The collision sensor on the car detects the collision information received by the vehicle and transmits the information to the car's electronic control unit. The electronic control unit sends a signal to open the electric valve or solenoid valve on the air outlet pipe, or presses a button to connect the circuit, which will open the electric valve or solenoid valve, allowing the gas in the air tank to enter the lock chamber along the air outlet pipe. The pressure at the front of the lock tail plate increases, thereby pushing the lock tail plate of the fork-type lock to move backward, causing the straight locking pin to retract into the lock chamber. The straight locking pin disengages from the lock tongue, allowing the car door to open. Attached Figure Description

[0009] The pneumatic car safety lock of this utility model will be further described with reference to the accompanying drawings and embodiments.

[0010] Figure 1 This is a schematic diagram of the pneumatic car safety lock of this utility model. The front part of the lock chamber has been removed from the diagram.

[0011] Figure 2 This is a schematic diagram of the front cover plate of the pneumatic car safety lock of this utility model.

[0012] Figure 3 This is a schematic diagram of the rear cover plate of the pneumatic car safety lock of this utility model.

[0013] Figure 4 This is a schematic diagram of the fork-type latch of the pneumatic car safety latch of this utility model.

[0014] Figure 5 This is a schematic diagram of an existing technology latch and car door lock.

[0015] Figure 6 This is a top-view schematic diagram of an existing technology locking mechanism.

[0016] In the diagram, 1 is the lock body, 2 is the bolt, 3 is the lock cylinder, 4 is the latch, 5 is the battery, 6 is the straight lock pin, 7 is the lock tail plate, 8 is the pressure spring, 9 is the housing, 10 is the front cover plate, 11 is the air compressor, 12 is the air tank, 13 is the wire, 14 is the collision sensor, 15 is the rear cover plate, 16 is the front through hole, 17 is the door, 18 is the door frame, 19 is the connecting through hole, 20 is the rear through hole, 21 is the solenoid valve, 22 is the button, 23 is the U-shaped lock pin, 24 is the U-shaped pin cap, 25 is the electronic control unit, 26 is the screw rod, 27 is the external through hole, 28 is the boss, 29 is the air outlet pipe, 30 is the air inlet pipe, and 31 is the pressure switch. Detailed Implementation

[0017] The principle and operation of this pneumatic car safety lock are explained in detail below with reference to the accompanying drawings:

[0018] A pneumatic car safety lock, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown: Its structure includes a battery, wires, an air compressor, an air tank, an electric valve or solenoid valve, a latching compartment, a fork-type latch, a positive pressure spring, and a button; the latching compartment includes a front cover, a rear cover, and a housing. The front cover has one or two front through holes in the center, two to five connecting through holes on the outer side of the front through holes, and two to four external through holes on the outer side of the connecting through holes. The front cover is fixedly connected to the door frame of the vehicle body near the door by screws passing through the external through holes. The connecting through hole of the cover plate connects to the internal threaded hole on the front side of the housing. A boss, 3 mm to 20 mm wide and 3 mm to 10 mm high, is provided along the inner wall of the front part of the housing. A rear through hole is provided in the middle of the rear cover plate, and two to five connecting through holes are provided on the outer side of the rear through hole. The screw rod passes through the connecting through hole of the rear cover plate and connects to the internal threaded hole on the rear side of the housing. The fork-type latch includes a straight locking pin, a ring-shaped pin cap, and a locking tail plate. The straight locking pin is one or two straight cylinders, and the rear part of the straight locking pin is fixed to the front part of the locking tail plate. The lock tailplate is located within the lock chamber, at the rear of the boss. The straight locking pin of the fork-type lock protrudes from the front through-hole of the front cover plate and extends outside the door frame, opposite the lock body on the door. A U-shaped pin cap fits onto the straight locking pin. A pressure spring is installed between the rear of the lock tailplate and the rear cover plate. The air compressor outlet is connected to the air tank via an inlet pipe. The air tank outlet is connected to the housing between the front cover plate and the lock tailplate at the front of the lock chamber via an outlet pipe. An electric valve or solenoid valve is installed on the outlet pipe. A pressure switch is installed on the air tank. The air compressor is connected to the pressure switch via a wire. The pressure switch is connected to the battery electrode via a wire. The electric valve or solenoid valve is connected to one electrode of the battery via a wire, and the other wire is connected to the vehicle's electronic control unit. The vehicle's collision sensor is connected to the electronic control unit via a wire. The button and electronic control unit are connected to the other electrode of the battery via a wire. The battery, air compressor, and air tank are installed on the vehicle chassis.

[0019] Existing collision sensors are typically used in conjunction with airbags and are usually installed at the front or sides of a vehicle to detect information such as the intensity and direction of a collision. When a collision reaches a certain threshold, a signal is sent to the control unit.

[0020] The Electronic Control Unit (ECU) is like the brain of a car. It receives signals from sensors, analyzes and judges the signals, and if the judgment result meets the conditions for triggering a certain device, it will issue a command to that device to complete the corresponding work.

[0021] Example 1

[0022] The process of using a pneumatic car safety lock

[0023] like Figure 1As shown: This utility model of a pneumatic car safety lock is installed on the door frame of a car. The straight locking pin protrudes outside the door frame. When the car starts, the air compressor starts to fill the air tank. When the air pressure in the air tank reaches a predetermined value, such as 1 MPa, the pressure switch is disconnected, stopping the air compressor and maintaining an air pressure of 1 MPa in the air tank. The collision sensor on the car detects collision information. When the collision reaches the trigger condition, the information is transmitted to the car's electronic control unit. The electronic control unit sends a signal to trigger the opening of the electric valve or solenoid valve on the air outlet pipe of this utility model of a pneumatic car safety lock, or the button is pressed manually to connect the circuit. This will open the electric valve or solenoid valve on the air outlet pipe, allowing the gas in the air tank to enter the front part of the lock tail plate in the lock chamber along the air outlet pipe. The pressure in the front part of the lock tail plate increases, thereby pushing the lock tail plate of the fork lock to move backward, causing the straight locking pin to retract into the lock chamber. The straight locking pin disengages from the lock tongue, allowing the car door to open.

[0024] Regarding the potential dangers that compressed air may pose to a car, firstly, the lock compartment and the air tank are very small. The lock compartment is no larger than the volume of a size D battery, approximately 43.1 cubic centimeters, while the air tank is about twice the size of the lock compartment, approximately 86.2 cubic centimeters. Relative to the size of a car, the potential danger from compressed gas of this size is negligible. Furthermore, the air tank is separated from the occupants by the car's steel body, so damage to the air tank will not pose a safety risk to the occupants. There is also the risk of the vent pipe bursting. The vent pipe is located in the interlayer between the inner and outer steel plates of the door frame. When one side of the door is hit, the door frame may be bent and deformed. The vent pipe is protected by the inner and outer steel plates, so the risk of bending and deformation is very small. Even if the vent pipe on one side breaks and gas leaks into the interlayer of the door frame, the amount of gas is very small and will not cause injury to the people inside the car. Meanwhile, the pneumatic car safety lock on the other side can operate normally, ensuring that the other side of the door can be opened normally, which greatly improves the safety of the people inside the car.

[0025] This utility model of a pneumatic car safety lock can be used with existing mechanical or electronic door locks, enabling ordinary door locks to open the car door upon collision. It can also be used with car door locks that have a collision self-unlocking function to enhance the reliability of the collision self-unlocking door lock.

[0026] The circuit components described in the instruction manual for this pneumatic car safety lock have been simplified. For example, voltage conversion, relay isolation, and secondary control circuits are not mentioned as they are all existing technologies. Moreover, describing them in detail would be too cumbersome. This description is only used to illustrate the principle and logical relationship of the circuit involved in this utility model.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pneumatic car safety latch, an improvement on the latch in car locks, mainly composed of a fork-type latch, a latch chamber, and a battery, characterized in that: Its structure includes a battery, wires, an air compressor, an air tank, an electric valve or solenoid valve, a latching compartment, a fork-type latch, a positive pressure spring, and a button. The latching compartment includes a front cover, a rear cover, and a housing. The front cover has one or two front through holes in the middle, two to five connecting through holes on the outer side of the front through holes, and two to four external through holes on the outer side of the connecting through holes. The front cover is fixedly connected to the door frame of the vehicle body near the door by screws passing through the external through holes. The connecting through hole connects to the internal threaded hole on the front side of the housing. A boss, 3 mm to 20 mm wide and 3 mm to 10 mm high, is provided along the inner wall of the front part of the housing. A rear through hole is provided in the middle of the rear cover plate, and two to five connecting through holes are provided on the outer side of the rear through hole. The screw rod passes through the connecting through hole of the rear cover plate and connects to the internal threaded hole on the rear side of the housing. The fork-type latch includes a straight locking pin, a ring-shaped pin cap, and a locking tail plate. The straight locking pin is one or two straight cylinders, and the rear part of the straight locking pin is fixedly connected to the front part of the locking tail plate. Next, the tailplate is located inside the latch chamber, at the rear of the boss. The straight locking pin of the fork-type latch protrudes from the front through hole of the front cover plate and onto the outside of the door frame, opposite to the lock body on the door. The circular pin cap is fitted onto the straight locking pin. A pressure spring is installed between the rear of the tailplate and the rear cover plate. The air compressor outlet is connected to the air tank through the air inlet pipe. The air tank outlet is connected to the housing between the front cover plate and the tailplate at the front of the latch chamber through the air outlet pipe. An electric valve or solenoid valve is installed on the air outlet pipe. A pressure switch is installed on the air tank. The air compressor is connected to the pressure switch through a wire. The pressure switch is connected to the battery electrode through a wire. The electric valve or solenoid valve is connected to one electrode of the battery through one wire and to the vehicle's electronic control unit through another wire. The vehicle's collision sensor is connected to the electronic control unit through a wire. The button and electronic control unit are connected to the other electrode of the battery through a wire. The battery, air compressor, and air tank are installed on the chassis of the vehicle.

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