Car safety lock

Abstract

This invention discloses a car safety latch, belonging to the field of automotive lock technology. Its structure includes six forms: retractable safety latch, sliding safety latch, pneumatic safety latch, hydraulic safety latch, electric safety latch, and manual safety latch. The structure comprises a battery, wires, a gas generator, a cylinder chamber, a hammer, a latch chamber, a slide rod, a button, a fork-type latch, and a positive pressure spring. It is fixedly installed inside the car door frame. The straight locking pin of the fork-type latch protrudes outside the door frame, opposite the lock body on the door. In the event of a collision, the power unit is triggered by a collision sensor, manual pressing of the button, or the car's electronic control unit, causing the fork-type latch to move, disengaging the latch tongue from the straight locking pin of the safety latch, thereby opening the car door.

Description

Technical Field

[0001] This invention relates to a car safety latch, belonging to the field of car lock technology, and in particular to a car door lock latch technology that can automatically unlock in the event of a car collision. Background Technology

[0002] Car door locks, such as Figure 13 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 14 As shown: Also called a lock pin or door stop, it includes a U-shaped lock pin and a lock tail seat. The U-shaped lock pin and the lock tail seat 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 car safety latch that can open car doors by moving the latch when a collision occurs or the door lock malfunctions and cannot be opened.

[0006] The technical solution of this invention to solve the above problems is: a car safety latch, the structure of which includes six forms: retractable safety latch, sliding safety latch, pneumatic safety latch, hydraulic safety latch, electric safety latch, and manual safety latch. The retractable safety latch includes a battery, wires, a gas generator, a cylinder chamber, a hammer, a latch chamber, a slide rod, a button, a fork-type latch, and a positive pressure spring. The latch chamber is fixedly installed on the side of the car door frame near the door, with a through hole at the front. The fork-type latch includes a straight locking pin, a circular locking pin cap, and a locking tail seat. The straight locking pin is one or two straight cylinders, and the rear of the straight locking pin is connected to the lock... The front of the tailstock is fixedly connected, and the U-shaped post cap is fitted onto the straight lock post. The tailstock is located inside the latch chamber. The straight lock post of the fork-type latch protrudes from the outside of the door frame through the through hole of the latch chamber, opposite to the lock body on the door. A pressure spring is installed between the rear of the tailstock and the latch chamber. A sliding rod is located above and below the pressure spring, parallel to the straight lock post. Its front end is fixedly connected to the tailstock, and its rear end passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the cylinder chamber. A hammer is installed between the latch chamber and the cylinder chamber. A sealing ring is located at the rear of the hammer. The top of the hammer has an acute triangular cross-section, and the top of the hammer is inserted into the tailstock. Between the latch chamber and the lock tail seat, the top cross-section of the side contacting the hammer is an acute-angled triangle; the structure of the sliding safety latch includes a battery, wires, a gas generator, a cylinder chamber, a circular piston rod, a piston, a button, and a fork-type latch; the cylinder chamber is fixedly installed on the side of the car door frame near the door, the straight locking pin of the fork-type latch protrudes outside the door frame, opposite to the lock body on the door, one end of the circular piston rod is fixedly connected to the piston, a sealing ring is set on the piston, the piston is installed in the cylinder chamber, a pressure spring is set between the rear of the piston and the cylinder chamber, and the rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the circular piston rod; gas The generator is located inside the cylinder chamber of the retractable safety lock and the sliding safety lock. The expanding agent and the resistance wire are located inside the gas generator. Each end of the resistance wire is connected to a wire. One wire is connected to one electrode of the battery, and the other wire is connected to the collision sensor or button of the car's airbag system or the car's electronic control unit. The collision sensor or button or electronic control unit is connected to the other electrode of the battery through the wire. The structure of the pneumatic safety lock includes a battery, wires, air compressor, air tank, solenoid valve, cylinder chamber, hammer or piston rod, piston, lock chamber, slide bar, button, fork lock, and positive pressure spring.The latch chamber is fixedly installed on the side of the car door frame near the door. A through hole is provided at the front. The straight locking pin of the fork-type latch protrudes from the through hole onto the outside of the door frame, opposite the lock body on the door. A pressure spring is installed between the rear of the lock tail seat and the latch chamber. A sliding rod is positioned above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the lock tail seat, and its rear end passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the cylinder chamber. A hammer is installed between the latch chamber and the cylinder chamber. A sealing ring is located behind the hammer. Alternatively, the cylinder chamber can be fixedly installed on the side of the car door frame near the door, with the straight locking pin of the fork-type latch protruding from the outside of the door frame. Opposite to the lock body on the car door, one end of the loop-shaped piston rod is fixedly connected to the piston, a sealing ring is set on the piston, the piston is installed in the cylinder cavity, and a pressure spring is set between the rear of the piston and the cylinder cavity. The rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the loop-shaped piston rod; the air compressor outlet is connected to the air tank through the air inlet pipe, and the air tank outlet is connected to the cylinder cavity through the air outlet pipe. A solenoid valve is set on the air outlet pipe, and a pressure switch is set on the air tank. The air compressor is connected to the pressure switch through a wire, and the pressure switch is connected to the battery terminals through a wire. The solenoid valve is connected to one terminal of the battery through one wire, and the other wire is connected to... The collision sensor, button, or electronic control unit of the car's airbag system is connected to the other electrode of the battery via a wire. The hydraulic safety latch structure includes a battery, wires, a hydraulic pump, a hydraulic reservoir, a solenoid valve, a check valve, a cylinder chamber, a hammer or piston rod, a piston, a latch chamber, a slide bar, a button, a pressure tank, a fork-type latch, and a positive pressure spring. The latch chamber is fixedly installed on the side of the car's door frame near the door, with a through hole at the front. The straight locking pin of the fork-type latch protrudes through the through hole onto the outside of the door frame, opposite the lock body on the door. The rear of the latch seat is between the latch chamber and the door frame. A pressure spring is provided, and a sliding rod is set at the upper and lower parts of the pressure spring, parallel to the straight locking pin. The front end is fixedly connected to the lock tail seat, and the rear part passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the hydraulic cylinder chamber. A hammer is set between the latch chamber and the hydraulic cylinder chamber, or the hydraulic cylinder chamber is fixedly installed on the inside of the car door frame. The straight locking pin of the fork-type latch protrudes outside the door frame and is opposite to the lock body on the car door. One end of the circular piston rod is fixedly connected to the piston. A sealing ring is set on the piston. The piston is installed in the hydraulic cylinder chamber. A pressure spring is set between the rear of the piston and the hydraulic cylinder chamber. The rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the circular piston rod.The hydraulic pump's outlet is connected to the cylinder cavity via an outlet pipe. One end of the inlet pipe is connected to the hydraulic pump's inlet, and the other end is located inside the hydraulic oil storage tank. A solenoid valve is installed on the outlet pipe. A check valve or solenoid valve is installed on the return pipe, with one end connected to the cylinder cavity and the other end connected to the hydraulic oil storage tank. The hydraulic pump and the solenoid valve on the outlet pipe are connected to one electrode of the battery via a wire, and another wire is connected to the collision sensor or button of the vehicle's airbag system or the vehicle's electronic control unit. The collision sensor, button, or electronic control unit is connected to the other electrode of the battery via a wire; or the hydraulic pump is connected to the booster via the front outlet pipe. The tank is connected to the hydraulic cylinder cavity via an outlet pipe. A solenoid valve is installed on the outlet pipe. A pressure switch is installed on the pressure tank. The hydraulic oil pump is connected to the pressure switch via an electric wire, and the pressure switch is connected to the battery terminals via an electric wire. The electric safety latch structure includes a fork-type latch, battery, electric wire, motor, button, rack, gear, latch bracket, motor bracket, slide rail, slider, and screw-nut mechanism. The screw-nut mechanism includes a screw, nut, and bearing support. The straight locking pin of the fork-type latch protrudes from the outside of the door frame, opposite to the lock body on the door. The rear of the lock tail seat is fixedly connected to the slider and rack. The latch bracket is fixedly installed on the inside of the door frame. The slide rail is fixedly connected to the latch bracket, and the slide rail is connected to the slider. The motor bracket is fixedly installed on the inner side of the door frame. The motor is fixedly connected to the motor bracket. The gear is mounted on the motor shaft and meshes with the rack. Alternatively, a screw and nut mechanism is fixedly connected to the motor bracket via a bearing support. The motor shaft is connected to one end of the screw, and the nut is connected to the lock tail seat. The motor is connected to one electrode of the battery via a wire, and the other wire is connected to the collision sensor or button of the car's airbag system or the car's electronic control unit. The collision sensor, button, or electronic control unit is connected to the other electrode of the battery via a wire. The manual safety latch structure includes... The system includes a fork-type latch, a slide bar, a latch chamber, a pressure spring, a rack, a gear, and a handle. The latch chamber is fixedly installed on the side of the car door frame near the door, with a through hole at the front. The straight locking pin of the fork-type latch protrudes from the through hole onto the outside of the door frame, opposite the lock body on the door. A pressure spring is installed between the rear of the latch seat and the latch chamber. The slide bar is positioned above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the latch seat, and its rear end passes through the through hole at the rear of the latch chamber. One side of the latch seat is fixedly connected to the rack. The gear is fixedly connected to the handle, and the gear meshes with the rack. The handle is located on the side of the door frame inside the car's driver's compartment.

[0007] The expanding agent mentioned above is sodium azide or guanidine nitrate.

[0008] As described above, a screw hole is provided on the cylinder cavity, and a screw rod is provided in the screw hole, or an external threaded tube is provided, and a solenoid valve is provided on the external threaded tube.

[0009] As described above, a screw hole is provided on the cylinder cavity, and a screw rod is provided in the screw hole, or an external threaded tube is provided, and a solenoid valve is provided on the external threaded tube.

[0010] Its beneficial effects are:

[0011] When a car collision occurs, the collision sensor, manually pressing a button, or the car's electronic control unit triggers the resistance wire of the gas generator, causing the sodium azide or guanidine nitrate inside the gas generator to react. This causes the gas in the cylinder chamber to expand and the pressure to increase. The pressure in the cylinder chamber pushes the hammer or the piston rod to move, which in turn pushes the straight locking pin of the safety latch to move. Alternatively, the hydraulic pump, air compressor, or electric motor can be triggered to move the fork latch, or the handle can be manually cranked to move the fork latch, causing the latch tongue to disengage from the straight locking pin of the safety latch, thereby opening the car door. Attached Figure Description

[0012] The present invention will be further described with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the retractable safety lock of the automotive safety lock of the present invention. The front parts of the gas generator, the lock chamber, and the cylinder chamber have been removed from the diagram.

[0014] Figure 2 This is a schematic diagram of the sliding safety lock of the automotive safety lock of the present invention. The front part of the gas generator and cylinder chamber has been removed from the diagram.

[0015] Figure 3 This is a top view schematic diagram of the fork-type lock of the automotive safety lock of the present invention.

[0016] Figure 4 This is a schematic diagram of a pneumatic safety lock connecting the cylinder chamber and the lock compartment chamber of the present invention. The front parts of the lock compartment chamber and the cylinder chamber have been removed from the diagram.

[0017] Figure 5 This is a schematic diagram of the pneumatic safety lock with a spiral piston rod for automobiles according to the present invention. The front part of the cylinder cavity has been removed from the diagram.

[0018] Figure 6 This is a schematic diagram of a hydraulic safety lock connecting the hydraulic cylinder cavity and the lock chamber cavity of the present invention. The front parts of the hydraulic oil tank, the lock chamber cavity, and the hydraulic cylinder cavity have been removed from the diagram.

[0019] Figure 7 This is a schematic diagram of the hydraulic safety lock with a spiral piston rod of the present invention. The front part of the hydraulic oil tank and the cylinder cavity has been removed from the diagram.

[0020] Figure 8 This is a schematic diagram of a hydraulic safety lock with a pressurized tank, where the hydraulic cylinder cavity and the lock chamber cavity of the present invention are connected. The front parts of the hydraulic oil tank, the lock chamber cavity, and the hydraulic cylinder cavity are removed from the diagram.

[0021] Figure 9 This is a schematic diagram of the hydraulic safety lock of the present invention, which features a spiral piston rod and a pressure tank. The front part of the hydraulic oil tank and the cylinder cavity has been removed from the diagram.

[0022] Figure 10 This is a schematic diagram of the electric safety lock of the gear in the automotive safety lock of the present invention.

[0023] Figure 11 This is a schematic diagram of the electric safety lock with a lead screw and nut mechanism for automobile safety locks according to the present invention.

[0024] Figure 12 This is a schematic diagram of the manual safety lock of the car safety lock of the present invention. The front part of the lock chamber cavity has been removed from the diagram.

[0025] Figure 13 This is a schematic diagram of an existing technology latch and car door lock.

[0026] Figure 14 This is a top-view schematic diagram of an existing locking mechanism.

[0027] Figure 15 This is a schematic diagram of an existing airbag technology, with the front part of the gas generator removed.

[0028] 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 seat, 8 is the pressure spring, 9 is the latch chamber, 10 is the cylinder chamber, 11 is the gas generator, 12 is the resistance wire, 13 is the wire, 14 is the collision sensor, 15 is the slide bar, 16 is the hydraulic cylinder chamber, 17 is the car door, 18 is the door frame, 19 is the hammer, 20 is the U-shaped piston rod, 21 is the airbag, 22 is the button, 23 is the electric motor, 24 is the gear, 25 is the rack, 26 is the handle, and 27 is the U-shaped lock pin. 8 is a spiral cap, 29 is an air compressor, 30 is an air tank, 31 is an electronic control unit, 32 is a hydraulic pump, 33 is a hydraulic oil tank, 34 is a solenoid valve, 35 is a check valve, 36 is an inlet pipe, 37 is an outlet pipe, 38 is a return pipe, 39 is an air inlet pipe, 40 is an air outlet pipe, 41 is a pressure switch, 42 is a screw rod, 43 is a piston, 44 is a locking bracket, 45 is a motor bracket, 46 is a slide rail, 47 is a slider, 48 is a lead screw, 49 is a nut, 50 is a bearing support, 51 is a front outlet pipe, and 52 is a booster tank. Detailed Implementation

[0029] The principle and operation of the automotive safety lock of this invention are explained in detail below with reference to the accompanying drawings:

[0030] A type of automotive safety latch, comprising six structural forms: retractable safety latch, sliding safety latch, pneumatic safety latch, hydraulic safety latch, electric safety latch, and manual safety latch. The retractable safety latch, for example... Figure 1 As shown: Its structure includes a battery, wires, a gas generator, a cylinder chamber, a hammer, a latch chamber, a slide bar, a button, a fork-type latch, and a positive pressure spring; the latch chamber is fixedly installed on the side of the car's door frame near the door, with a through hole at the front, and a fork-type latch, as shown. Figure 3 As shown: Includes a straight locking pin, a circular pin cap, and a tailstock. The straight locking pin is one or two straight cylinders. The rear of the straight locking pin is fixedly connected to the front of the tailstock. The circular pin cap is fitted onto the straight locking pin. The tailstock is located within the latch chamber. The straight locking pin of the fork-type latch protrudes from the outside of the door frame through the through hole of the latch chamber, opposite to the lock body on the door. A pressure spring is installed between the rear of the tailstock and the latch chamber. A sliding rod is located above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the tailstock, and its rear end passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the cylinder chamber. A hammer is installed between the latch chamber and the cylinder chamber. A sealing ring is located at the rear of the hammer. The top of the hammer has an acute triangular cross-section. The top of the hammer is inserted between the tailstock and the latch chamber. The top cross-section of the side of the tailstock that contacts the hammer is an acute triangular cross-section. A sliding safety latch, such as... Figure 2 The structure shown includes a battery, wires, a gas generator, a cylinder chamber, a rotary piston rod, a piston, a button, and a fork-type latch. The cylinder chamber is fixedly installed on the side of the car door frame near the door. The straight locking pin of the fork-type latch protrudes from the outside of the door frame, opposite the lock body on the door. One end of the rotary piston rod is fixedly connected to the piston. A sealing ring is placed on the piston, which is installed in the cylinder chamber. A pressure spring is placed between the rear of the piston and the cylinder chamber. The rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the rotary piston rod. The gas generator is located in the cylinder chamber of the retractable safety latch and the sliding safety latch. The expanding agent and the resistance wire are located in the gas generator. Each end of the resistance wire is connected to a wire. One wire is connected to one electrode of the battery, and the other wire is connected to the collision sensor or button of the car's airbag system or the car's electronic control unit. The collision sensor or button or electronic control unit is connected to the other electrode of the battery through the wire. A pneumatic safety latch, such as... Figure 4 , Figure 5As shown: Its structure includes a battery, wires, an air compressor, an air tank, a solenoid valve, a cylinder chamber, a hammer or a piston rod, a piston, a latch chamber, a slide rod, a button, a fork-type latch, and a positive pressure spring. The latch chamber is fixedly installed on the side of the car door frame near the door, with a through hole at the front. The straight locking pin of the fork-type latch protrudes through the through hole and extends outside the door frame, opposite to the lock body on the door. A pressure spring is installed between the rear of the latch seat and the latch chamber. A slide rod is located above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the latch seat, and its rear end passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the cylinder chamber. A hammer is installed between the latch chamber and the cylinder chamber. A sealing ring is located at the rear of the hammer. Alternatively, the cylinder chamber is fixedly installed on the side of the car door frame near the door, with the straight locking pin of the fork-type latch protruding outside the door frame and facing the door. The lock bodies on the door are opposite each other. One end of the loop piston rod is fixedly connected to the piston. A sealing ring is set on the piston. The piston is installed in the cylinder cavity. A pressure spring is set between the rear of the piston and the cylinder cavity. The rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the loop piston rod. The air compressor outlet is connected to the air tank through the air inlet pipe. The air tank outlet is connected to the cylinder cavity through the air outlet pipe. A solenoid valve is set on the air outlet pipe. A pressure switch is set 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 solenoid valve is connected to one electrode of the battery through a wire. The other wire is connected to the collision sensor or button of the car's airbag system or the car's electronic control unit. The collision sensor or button or electronic control unit is connected to the other electrode of the battery through a wire. Hydraulic safety latch, such as Figure 6 , Figure 7As shown: Its structure includes a battery, wires, hydraulic pump, hydraulic oil tank, solenoid valve, check valve, hydraulic cylinder cavity, hammer or rotary piston rod, piston, latch chamber cavity, slide rod, button, fork-type latch, and positive pressure spring; the latch chamber cavity is fixedly installed on the side of the car door frame near the door, with a through hole at the front. The straight locking pin of the fork-type latch protrudes from the through hole outside the door frame, opposite to the lock body on the door. A pressure spring is installed between the rear of the latch seat and the latch chamber cavity. The slide rod is located above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the latch seat, and its rear end passes through the through hole at the rear of the latch chamber cavity. The latch chamber cavity is connected to the hydraulic cylinder cavity. A hammer is installed between the latch chamber cavity and the hydraulic cylinder cavity. Alternatively, the hydraulic cylinder cavity is fixedly installed on the inside of the car door frame, with the straight locking pin of the fork-type latch protruding from the outside of the door frame, opposite to the lock body on the door. One end of the rotary piston rod is connected to the hydraulic cylinder cavity cavity. The piston is fixedly connected, with a sealing ring on it. The piston is installed in the hydraulic cylinder cavity. A pressure spring is installed between the rear of the piston and the hydraulic cylinder cavity. The rear of the fork-type lock's tail seat is fixedly connected to the other end of the return piston rod. The hydraulic pump's outlet is connected to the hydraulic cylinder cavity via an outlet pipe. One end of the inlet pipe is connected to the hydraulic pump's inlet, and the other end is located in the hydraulic oil storage tank. A solenoid valve is installed on the outlet pipe, and a check valve or solenoid valve is installed on the return pipe. One end of the return pipe is connected to the hydraulic cylinder cavity, and the other end is connected to the hydraulic oil storage tank. The hydraulic pump and the solenoid valve on the outlet pipe are connected to one electrode of the battery via a wire, and another wire is connected to the collision sensor or button of the vehicle's airbag system or the vehicle's electronic control unit. The collision sensor, button, or electronic control unit is connected to the other electrode of the battery via a wire; or the hydraulic pump is connected to the booster tank via the front outlet pipe, such as... Figure 8 , Figure 9 As shown; the booster tank is connected to the hydraulic cylinder cavity via an outlet pipe, a solenoid valve is installed on the outlet pipe, a pressure switch is installed on the booster tank, the hydraulic oil pump is connected to the pressure switch via an electric wire, and the pressure switch is connected to the battery terminals via an electric wire; an electric safety lock, such as... Figure 10 , Figure 11As shown: Its structure includes a fork-type latch, battery, wires, motor, button, rack, gear, latch bracket, motor bracket, slide rail, slider, and screw-nut mechanism. The screw-nut mechanism includes a screw, nut, and bearing support. The straight locking pin of the fork-type latch protrudes outside the door frame, opposite the lock body on the door. The rear part of the lock tail seat is fixedly connected to the slider and rack. The latch bracket is fixedly installed on the inside of the door frame. The slide rail is fixedly connected to the latch bracket and the slider. The motor bracket is fixedly installed on the inside of the door frame. The motor is fixedly connected to the motor bracket. The gear is mounted on the motor shaft and meshes with the rack. Alternatively, the screw-nut mechanism is fixedly connected to the motor bracket via the bearing support. The motor shaft is connected to one end of the screw. The nut is connected to the lock tail seat. The motor is connected to one electrode of the battery via one wire, and the other wire is connected to the collision sensor or button of the car's airbag system or the car's electronic control unit. The collision sensor or button or electronic control unit is connected to the other electrode of the battery via a wire. Manual safety latches, such as... Figure 12 As shown: Its structure includes a fork-type latch, a slide bar, a latch chamber, a pressure spring, a rack, a gear, and a handle. The latch chamber is fixedly installed on the side of the car door frame near the door, with a through hole at the front. The straight locking pin of the fork-type latch protrudes from the outside of the door frame through the through hole, opposite to the lock body on the door. A pressure spring is installed between the rear of the latch seat and the latch chamber. The slide bar is located above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the latch seat, and its rear end passes through the through hole at the rear of the latch chamber. One side of the latch seat is fixedly connected to the rack. The gear is fixedly connected to the handle, and the gear meshes with the rack. The handle is located on the side of the door frame inside the car's driver's compartment.

[0031] The expanding agent mentioned above is sodium azide or guanidine nitrate.

[0032] As described above, a screw hole is provided on the cylinder cavity, and a screw rod is provided in the screw hole, or an external threaded tube is provided, and a solenoid valve is provided on the external threaded tube.

[0033] As described above, a screw hole is provided on the cylinder cavity, and a screw rod is provided in the screw hole, or an external threaded tube is provided, and a solenoid valve is provided on the external threaded tube.

[0034] The retractable and sliding safety lock design of this invention is inspired by automotive airbag technology. Airbags inflate to protect occupants during a collision by triggering a gas generator through a collision sensor. The expansion of the gas not only inflates the airbag but also generates pressure that can move objects. Based on this principle, the applicant believes that in the event of a collision, simply moving the lock to disengage it from the latch will automatically unlock the locked door. Since this invention uses a similar principle to airbags, a brief explanation of airbags is also provided here. Figure 15 As shown: The structure of an airbag includes an airbag, a battery, a gas generator, a collision sensor, and an electronic control unit. One end of a resistance wire in the gas generator is connected to one electrode of the battery via a wire, and the other end of the resistance wire is connected to the vehicle's electronic control unit via another wire. The electronic control unit is connected to the other electrode of the battery via a wire, and the collision sensor is connected to the electronic control unit via a wire.

[0035] Normally, airbags are folded and stored in specific locations inside the vehicle, such as the center of the steering wheel or the dashboard. They are typically made of strong yet soft fabric, effectively cushioning impacts upon deployment. The gas generator is responsible for rapidly producing a large amount of gas upon triggering, causing the airbag to inflate and deploy quickly.

[0036] Sensors come in various types, such as collision sensors, which are often installed at the front and sides of the vehicle to detect the intensity and direction of collisions. When a collision reaches a certain threshold, it sends a signal to the control unit. There are also safety sensors, which act as a safety measure to prevent false triggering. The airbag system will only activate when both the airbag and the collision sensor meet the triggering conditions.

[0037] The Electronic Control Unit (ECU) is like the brain of the airbag system. It receives signals from sensors, analyzes and judges the signals, and if the judgment result meets the conditions for the airbag to deploy, it will send a command to the gas generator to trigger the airbag to work.

[0038] How airbags work

[0039] During normal vehicle operation, the airbag system remains in standby mode. When a collision occurs, the collision sensors immediately detect the intensity and angle of the impact and transmit the corresponding signals to the Electronic Control Unit (ECU). The ECU quickly analyzes and processes these signals. If the collision severity reaches a pre-set threshold, and the safety sensors simultaneously confirm that the triggering requirements are met, the ECU sends a command to the airbag generator. Upon receiving the command, the gasbag generator energizes its internal resistance wire, generating high temperatures that cause a chemical reaction in the inflator. For example, the decomposition of substances like sodium azide produces a large amount of nitrogen gas, causing the airbag to inflate and deploy rapidly within a very short time, typically tens of milliseconds. This creates a buffer zone between the occupants and hard objects inside the vehicle, thus mitigating the impact injury. For instance, in a severe frontal collision, the airbags located at the steering wheel and dashboard will deploy to protect the front-seat occupants.

[0040] Example 1

[0041] The process of using the retractable safety latch to retract the straight locking pin into the latch chamber.

[0042] like Figure 1 As shown: The retractable safety lock of the present invention is installed on the door frame of the car. The straight locking pin protrudes outside the door frame. The collision sensor on the car detects the collision information of the vehicle. When the collision reaches the trigger condition, or when the car's electronic control unit sends a signal to open the airbag, it simultaneously sends a start signal to trigger the gas generator of the present invention's car safety lock, so that the circuit is connected. This triggers the resistance wire in the gas generator to be energized, causing the sodium azide or guanidine nitrate in the gas generator to undergo a chemical reaction. This causes the gas in the cylinder chamber to expand and the pressure to increase, thereby pushing the hammer to strike the lock tail seat of the fork-type lock, causing the straight locking pin to retract into the lock chamber cavity. The straight locking pin disengages from the lock tongue, allowing the car door to open.

[0043] Example 2

[0044] The process of using a sliding safety latch to retract the locking pin into the door frame.

[0045] like Figure 2As shown: The sliding safety lock of the present invention is installed on the door frame of the car. The straight locking pin protrudes outside the door frame. The collision sensor detects the collision information of the vehicle. When the collision reaches the trigger condition, or when the car's electronic control unit sends a signal to open the airbag, it simultaneously sends a start signal to trigger the gas generator of the car safety lock of the present invention, so that the circuit is connected. This triggers the resistance wire in the gas generator to be energized, causing the sodium azide or guanidine nitrate in the gas generator to undergo a chemical reaction. This causes the gas in the cylinder chamber to expand, the pressure to increase, and pushes the return piston rod to move. This causes the lock tail seat to move backward, so that the straight locking pin retracts into the door frame of the car. The straight locking pin disengages from the lock tongue, allowing the car door to open.

[0046] In the event of a dangerous situation outside of a collision, such as a locked door due to a malfunction, occupants can manually press a button to trigger the gas generator and open the door.

[0047] Example 3

[0048] The process of using a pneumatic safety latch to retract the locking pin into the door frame.

[0049] like Figure 4 , Figure 5 As shown: The pneumatic safety lock of the present invention is installed on the door frame of the car. The straight locking pin protrudes outside the door frame. The collision sensor detects the collision information of the vehicle. When the collision reaches the trigger condition, or when the car's electronic control unit sends a signal to open the airbag, it simultaneously sends a start signal to trigger the car safety lock of the present invention, or when a button is pressed by hand, the wires connecting the collision sensor, electronic control unit or button are connected, causing the solenoid valve to open. Gas in the gas tank enters the cylinder chamber, causing the pressure in the cylinder chamber to rise, pushing the hammer or the return piston rod to move, thereby driving the lock seat to move backward, causing the straight locking pin to retract into the door frame of the car. The straight locking pin disengages from the lock tongue, allowing the car door to open.

[0050] Example 4

[0051] The process of using a hydraulic safety latch to retract the locking pin into the door frame.

[0052] like Figure 6 , Figure 7 , Figure 8 , Figure 9As shown: The hydraulic safety lock of the present invention is installed on the door frame of the car. The straight locking pin protrudes outside the door frame. The collision sensor detects the collision information of the vehicle. When the collision reaches the trigger condition, or when the car's electronic control unit sends a signal to open the airbag, it simultaneously sends a start signal to trigger the car safety lock of the present invention, or when the button is pressed by hand, the wires connecting the collision sensor, electronic control unit or button are connected, causing the solenoid valve and hydraulic oil pump to open. The liquid in the hydraulic oil tank or pressurization tank enters the hydraulic cylinder cavity, causing the pressure in the hydraulic cylinder cavity to rise, pushing the hammer or the return piston rod to move, thereby driving the lock tail seat to move backward, causing the straight locking pin to retract into the door frame of the car. The straight locking pin disengages from the lock tongue, allowing the car door to open.

[0053] Example 5

[0054] The process of using an electric safety latch to retract the locking pin into the latch chamber.

[0055] like Figure 10 , Figure 11 As shown: The electric safety lock of the present invention is installed on the door frame of the car. The straight locking pin protrudes outside the door frame. The collision sensor on the car detects the collision information of the vehicle. When the collision reaches the trigger condition, or when the car's electronic control unit sends a signal to open the airbag, it simultaneously sends a start signal to trigger the motor of the car safety lock of the present invention, or when a button is pressed by hand, the motor is energized and rotates, driving the nut of the rack or lead screw to move backward, so that the straight locking pin retracts into the lock chamber. The straight locking pin disengages from the lock tongue, allowing the car door to open.

[0056] Example 6

[0057] The process of using the manual safety latch to retract the straight locking pin into the latch chamber.

[0058] like Figure 12 As shown: The manual safety lock of the present invention is installed on the door frame of the car. The straight lock pin protrudes outside the door frame. When the car door cannot be opened due to an accident, the people inside the car can manually crank the handle to move the rack backward, causing the straight lock pin to retract into the lock chamber. The straight lock pin then disengages from the lock tongue, allowing the car door to open.

[0059] The car safety lock latch of this invention can be used with existing mechanical or electronic door locks, enabling ordinary door locks to open the car door in the event of a 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.

[0060] The circuit components described in the instruction manual for the automotive safety lock of this invention 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 principles and logical relationships of the circuits involved in this invention.

[0061] The above description is only a preferred embodiment of the present invention. 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 invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A car safety latch, an improvement on the latch in car locks, mainly composed of a fork-type latch, a cylinder chamber, a latch compartment chamber, and a battery, characterized in that, Its structure includes six forms: retractable safety latch, sliding safety latch, pneumatic safety latch, hydraulic safety latch, electric safety latch, and manual safety latch. The retractable safety latch includes a battery, wires, a gas generator, a cylinder chamber, a hammer, a latch chamber, a slide rod, a button, a fork-type latch, and a positive pressure spring. The latch chamber is fixedly installed on the side of the car door frame near the door, with a through hole at the front. The fork-type latch includes a straight locking pin, a ring-shaped pin cap, and a tailstock. The straight locking pin is one or two straight cylinders, with its rear fixedly connected to the front of the tailstock. The ring-shaped pin cap fits onto the straight locking pin. On the pillar, the tailstock is located inside the latch chamber. The straight locking pin of the fork-type latch protrudes from the outside of the door frame through the through hole of the latch chamber, opposite to the lock body on the door. A pressure spring is installed between the rear of the tailstock and the latch chamber. A sliding rod is located above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the tailstock, and its rear end passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the cylinder chamber. A hammer is installed between the latch chamber and the cylinder chamber. A sealing ring is located at the rear of the hammer. The top of the hammer has an acute triangular cross-section. The top of the hammer is inserted between the tailstock and the latch chamber. The top cross-section of the side contacted by the hammer is an acute-angled triangle; the structure of the sliding safety latch includes a battery, wires, a gas generator, a cylinder chamber, a circular piston rod, a piston, a button, and a fork-type latch; the cylinder chamber is fixedly installed on the side of the car door frame near the door, the straight locking pin of the fork-type latch protrudes outside the door frame, opposite to the lock body on the door, one end of the circular piston rod is fixedly connected to the piston, a sealing ring is set on the piston, the piston is installed in the cylinder chamber, a pressure spring is set between the rear of the piston and the cylinder chamber, and the rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the circular piston rod; the gas generator is set in the... In both the push-type and sliding-type safety locks, an expanding agent and a resistance wire are placed inside the cylinder chamber of the gas generator. Each end of the resistance wire is connected to a wire. One wire is connected to one electrode of the battery, and the other wire is connected to the collision sensor or button of the car's airbag system or the car's electronic control unit. The collision sensor, button, or electronic control unit is connected to the other electrode of the battery via a wire. The structure of the pneumatic safety lock includes a battery, wires, an air compressor, a gas tank, a solenoid valve, a cylinder chamber, a hammer or a piston rod, a piston, a lock chamber, a slide bar, a button, a fork-type lock, and a positive pressure spring.The latch chamber is fixedly installed on the side of the car door frame near the door. A through hole is provided at the front. The straight locking pin of the fork-type latch protrudes from the through hole onto the outside of the door frame, opposite the lock body on the door. A pressure spring is installed between the rear of the lock tail seat and the latch chamber. A sliding rod is positioned above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the lock tail seat, and its rear end passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the cylinder chamber. A hammer is installed between the latch chamber and the cylinder chamber. A sealing ring is located behind the hammer. Alternatively, the cylinder chamber can be fixedly installed on the side of the car door frame near the door, with the straight locking pin of the fork-type latch protruding from the outside of the door frame. Opposite to the lock body on the car door, one end of the loop-shaped piston rod is fixedly connected to the piston. A sealing ring is set on the piston, which is installed in the cylinder cavity. A pressure spring is installed between the rear of the piston and the cylinder cavity. The rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the loop-shaped piston rod. The air compressor's outlet is connected to the air tank through an inlet pipe, and the air tank's outlet is connected to the cylinder cavity through an outlet pipe. A solenoid valve is installed on the outlet pipe, and a pressure switch is installed on the air tank. The air compressor is connected to the pressure switch through a wire, and the pressure switch is connected to the battery terminals through a wire. The solenoid valve is connected to one terminal of the battery through one wire, and the other wire is connected to... The collision sensor, button, or electronic control unit of the car's airbag system is connected to the other electrode of the battery via a wire. The hydraulic safety latch structure includes a battery, wires, a hydraulic pump, a hydraulic reservoir, a solenoid valve, a check valve, a cylinder chamber, a hammer or piston rod, a piston, a latch chamber, a slide bar, a button, a pressure tank, a fork-type latch, and a positive pressure spring. The latch chamber is fixedly installed on the side of the car's door frame near the door, with a through hole at the front. The straight locking pin of the fork-type latch protrudes through the through hole onto the outside of the door frame, opposite the lock body on the door. The rear of the latch seat is between the latch chamber and the door frame. A pressure spring is provided, and a sliding rod is set at the upper and lower parts of the pressure spring, parallel to the straight locking pin. The front end is fixedly connected to the lock tail seat, and the rear part passes through the through hole at the rear of the latch chamber. The latch chamber is connected to the hydraulic cylinder chamber. A hammer is set between the latch chamber and the hydraulic cylinder chamber, or the hydraulic cylinder chamber is fixedly installed on the inside of the car door frame. The straight locking pin of the fork-type latch protrudes outside the door frame and is opposite to the lock body on the car door. One end of the circular piston rod is fixedly connected to the piston. A sealing ring is set on the piston. The piston is installed in the hydraulic cylinder chamber. A pressure spring is set between the rear of the piston and the hydraulic cylinder chamber. The rear of the lock tail seat of the fork-type latch is fixedly connected to the other end of the circular piston rod.The hydraulic pump's outlet is connected to the cylinder cavity via an outlet pipe. One end of the inlet pipe is connected to the hydraulic pump's inlet, and the other end is located inside the hydraulic oil storage tank. A solenoid valve is installed on the outlet pipe. A check valve or solenoid valve is installed on the return pipe, with one end connected to the cylinder cavity and the other end connected to the hydraulic oil storage tank. The hydraulic pump and the solenoid valve on the outlet pipe are connected to one electrode of the battery via a wire, and another wire is connected to the collision sensor or button of the vehicle's airbag system or the vehicle's electronic control unit. The collision sensor, button, or electronic control unit is connected to the other electrode of the battery via a wire; or the hydraulic pump is connected to the booster via the front outlet pipe. The tank is connected to the hydraulic cylinder cavity via an outlet pipe. A solenoid valve is installed on the outlet pipe. A pressure switch is installed on the pressure tank. The hydraulic oil pump is connected to the pressure switch via an electric wire, and the pressure switch is connected to the battery terminals via an electric wire. The electric safety latch structure includes a fork-type latch, battery, electric wire, motor, button, rack, gear, latch bracket, motor bracket, slide rail, slider, and screw-nut mechanism. The screw-nut mechanism includes a screw, nut, and bearing support. The straight locking pin of the fork-type latch protrudes from the outside of the door frame, opposite to the lock body on the door. The rear of the lock tail seat is fixedly connected to the slider and rack. The latch bracket is fixedly installed on the inside of the door frame. The slide rail is fixedly connected to the latch bracket, and the slide rail is connected to the slider. The motor bracket is fixedly installed on the inner side of the door frame. The motor is fixedly connected to the motor bracket. The gear is mounted on the motor shaft and meshes with the rack. Alternatively, a screw and nut mechanism is fixedly connected to the motor bracket via a bearing support. The motor shaft is connected to one end of the screw, and the nut is connected to the lock tail seat. The motor is connected to one electrode of the battery via a wire, and the other wire is connected to the collision sensor or button of the car's airbag system or the car's electronic control unit. The collision sensor, button, or electronic control unit is connected to the other electrode of the battery via a wire. The manual safety latch structure includes... The system includes a fork-type latch, a slide bar, a latch chamber, a pressure spring, a rack, a gear, and a handle. The latch chamber is fixedly installed on the side of the car door frame near the door, with a through hole at the front. The straight locking pin of the fork-type latch protrudes from the through hole onto the outside of the door frame, opposite the lock body on the door. A pressure spring is installed between the rear of the latch seat and the latch chamber. The slide bar is positioned above and below the pressure spring, parallel to the straight locking pin. Its front end is fixedly connected to the latch seat, and its rear end passes through the through hole at the rear of the latch chamber. One side of the latch seat is fixedly connected to the rack. The gear is fixedly connected to the handle, and the gear meshes with the rack. The handle is located on the side of the door frame inside the car's driver's compartment.

2. The automotive safety lock according to claim 1, characterized in that: The swelling agent is sodium azide or guanidine nitrate.

3. The automotive safety lock according to claim 1, characterized in that: The cylinder cavity is provided with a screw hole, and a screw rod is provided in the screw hole, or an external threaded tube is provided, and a solenoid valve is provided on the external threaded tube.

4. The vehicle safety lock according to claim 1, characterized in that: The cylinder cavity is provided with a screw hole, and a screw rod is provided in the screw hole, or an external threaded tube is provided, and a solenoid valve is provided on the external threaded tube.

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