Automobile safety belt buckle mechanism, safety belt device, method and automobile

Abstract

The application relates to a car safety belt lock catch mechanism, a safety belt device, a method and a car, which comprises a lock catch body, a cavity is fixed in the cover of the lock catch body, a piston is slidably arranged in the cavity, one side of the piston is a cutting side, the cutting side penetrates through the cavity and the cover of the lock catch body and extends into the lock catch body, the position of the cutting side corresponds to the position of a lock tongue accommodated in the lock catch body, the other side of the piston is provided with a gas generator fixed in the cavity, the gas generator is connected with a control circuit; the gas generator can drive the gas pressure in the cavity on one side of the piston to exceed a set value, so that the piston moves towards the lock catch body, the cutting side of the piston can cut the lock tongue metal sheet in the lock catch body to cut the safety belt and the lock catch body, and the lock catch mechanism adopting the application saves rescue time and escape time in dangerous situations.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile safety belt, in particular to an automobile safety belt lock catch mechanism, a safety belt device, a method and an automobile. BACKGROUND

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] When a vehicle has a safety accident, the escape time is particularly important, but many times, due to the fact that the safety belt mechanical structure is stuck after the accident, the safety belt cannot be unlocked, and the personnel are trapped on the seat, missing the escape time, resulting in life safety. At present, the vehicle safety belt mainly adopts the traditional mechanical structure, which is mechanically connected through the lock tongue and the lock catch. When unlocking, the internal locking structure is unlocked by pressing the unlocking button.

[0004] The above structure may cause abnormality of the safety belt internal mechanical structure after the accident, and the safety belt cannot be unlocked by pressing. In addition, when the external rescuer cannot open the door after the safety accident, the safety belt unlocking button cannot be contacted. These all increase the rescue time and affect the passenger life safety. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide an automobile safety belt lock catch mechanism, a safety belt device, a method and an automobile, which can cut off the lock tongue of the safety belt when an emergency occurs, so as to avoid the personnel being trapped on the seat due to the safety belt when an emergency occurs, missing the escape time.

[0006] In order to achieve the above purpose, the present application is realized by the following technical scheme:

[0007] In a first aspect, the embodiments of the present application provide an automobile safety belt lock catch mechanism, which comprises a lock catch body, a cavity is fixed in the cover of the lock catch body, a piston is slidably arranged in the cavity, one side of the piston is a cutting side, the cutting side extends into the inside of the lock catch body after passing through the cavity and the cover of the lock catch body, and the position of the cutting side corresponds to the position of the lock catch body for accommodating the lock tongue. The other side of the piston is provided with a gas generator fixed in the cavity, and the gas generator is connected with a control circuit.

[0008] The gas generator can drive the piston to move towards the lock catch body when the gas pressure in the cavity on one side of the piston exceeds a set value, and the cutting side of the piston can cut off the lock tongue metal sheet in the lock catch body to cut off the safety belt and the lock catch body.

[0009] Optionally, a sealing ring is arranged between the piston and the inner cavity surface of the cavity to prevent gas leakage, so that there is enough pressure in the cavity to push the piston to move.

[0010] Optionally, the cutting side of the piston is provided with a cutting blade to facilitate better cutting of the lock tongue.

[0011] Optionally, the control circuit comprises a first loop and a second loop arranged in parallel, the first loop and the second loop are connected to a total loop through a switching switch, the total loop is connected in series with the gas generator and the power supply, the first loop is connected in series with a first resistor, the second loop is connected in series with a second resistor, the resistance of the first resistor is greater than that of the second resistor so that the first loop does not trigger the gas generator when conducting, and the second loop triggers the gas generator when conducting.

[0012] Further, the switching switch is arranged at a set position on the periphery of the automobile window, and a protective cover is arranged on the periphery of the switching switch.

[0013] Optionally, the power supply adopts a vehicle storage battery.

[0014] In a second aspect, an embodiment of the present application provides an automobile safety belt device, comprising a safety belt, a safety belt winding mechanism, a lock tongue mechanism and a lock catch mechanism, the safety belt is connected with the safety belt winding mechanism, the end of the safety belt connected with the lock catch mechanism is provided with the lock tongue mechanism, and the lock catch mechanism adopts the automobile safety belt lock catch mechanism in the first aspect.

[0015] Optionally, the lock tongue metal sheet of the lock tongue mechanism is provided with a groove at a position matched with the cutting side of the piston, so that the piston can better cut the lock tongue metal sheet.

[0016] Optionally, one end of the lock tongue metal sheet is used as a lock catch insertion end, and the other end is used as a safety belt connection end, in the lock hole on the lock tongue metal sheet, an edge close to the lock catch insertion end is a bottom edge, an edge close to the safety belt connection end is a top edge, and the groove is arranged between the bottom edge and the safety belt connection end of the lock tongue metal sheet.

[0017] In a third aspect, an embodiment of the present application provides a working method of the automobile safety belt device in the second aspect: in the matching state of the lock catch mechanism and the lock tongue mechanism, the control circuit triggers the gas generator, the gas generator generates high-pressure gas exceeding a set pressure in the cavity, the piston moves towards the lock catch body, the piston cuts the lock tongue metal sheet of the lock tongue mechanism by using the cutting side, and the safety belt is disconnected with the lock catch mechanism.

[0018] In a fourth aspect, an embodiment of the present application provides an automobile provided with the automobile safety belt device in the second aspect.

[0019] The beneficial effects of the present application are as follows:

[0020] 1. The seat belt buckle mechanism of the present application is provided with a cavity, a piston is arranged in the cavity, one side of the piston is a cutting side and extends into the inside of the buckle body, the other side is provided with a gas generator, the position of the cutting side of the piston corresponds to the position of the lock tongue metal sheet in the buckle body, when an emergency danger occurs, the rescuer can trigger the gas generator through the control circuit, the gas generator can generate a large amount of high-pressure gas in the cavity, thereby driving the piston to move towards the direction of the buckle body, the cutting side of the piston cuts off the lock tongue metal sheet inserted into the buckle body, thereby realizing the separation of the buckle mechanism and the seat belt, and further realizing the cutting of the seat belt, avoiding the problem that the seat belt cannot be unfastened due to the abnormal mechanical structure of the lock tongue and the buckle when a danger occurs, saving rescue and escape time, and ensuring the safety of passengers.

[0021] 2. The seat belt buckle mechanism of the present application, the switch is arranged at a set position on the periphery of the vehicle window, the rescuer can operate the switch to start the gas generator after breaking the window from the outside, without the need to open the door, thereby reducing the rescue time. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of these drawings illustrate one or more aspects of the present application and, together with their description, serve to explain the present application.

[0023] Figure 1 is a schematic diagram of the overall structure of embodiment 1 of the present application Figure One ;

[0024] Figure 2 is a schematic diagram of the overall structure of embodiment 1 of the present application Figure Two ;

[0025] Figure 3 is a schematic diagram of the overall structure of embodiment 2 of the present application

[0026] Among them, 1. Buckle body, 2. Lock tongue metal sheet, 3. Cavity, 4. Piston, 5. Knife tip structure, 6. Gas generator, 7. Control circuit, 8. Groove. DETAILED DESCRIPTION

[0027] Embodiment 1

[0028] This embodiment provides a seat belt buckle mechanism for a vehicle, as shown in Figures 1-2As shown, including the lock body 1, the lock body 1 uses the structure of the current car safety belt lock body, including the shell, the shell is provided with locking components for locking the lock tongue metal sheet 2, the shell is also provided with a button, the lock tongue metal sheet can be inserted into the shell, and then the locking component can be clamped into the locking hole of the lock tongue metal sheet, the lock tongue metal sheet is locked and fixed, after pressing the button, the locking component can be away from the locking hole, the locking state of the lock tongue metal sheet is released, the lock tongue metal sheet 2 is pushed out of the shell under the action of the spring in the shell, realizing the separation of the lock mechanism and the lock tongue.

[0029] The above technology can use the existing technology, and the further technical details will not be described in detail here. The current lock mechanism is a pure mechanical structure. If the car has an accident or other dangerous situation, it is easy to cause abnormal structure, and the locking state of the lock tongue and the lock mechanism cannot be contacted when pressing the button, which causes the delay of the rescue and escape time of the passengers.

[0030] In order to solve this problem, the embodiment is improved on the basis of the current lock mechanism, so that the rescue personnel or passengers can conveniently cut off the connection between the safety belt and the lock mechanism in the event of an accident or other dangerous situation, and facilitate the rescue and escape of the passengers.

[0031] Specifically, the outer side of the shell is fixed with a cavity 3, the cavity 3 is provided with a piston 4, the piston 4 is in sliding connection with the inner cavity surface of the cavity, and the piston 4 can do linear motion towards or away from the lock body 1.

[0032] One side of the piston 4 extends into the shell through the opening provided by the cavity and the shell, and the position of the piston 4 corresponds to the position for accommodating the lock tongue metal sheet 2 in the lock body 1, so that the piston 4 can contact the set position of the lock tongue metal sheet 2 when doing linear motion, and cut off the lock tongue metal sheet 2.

[0033] In the embodiment, the side of the piston 4 extending into the shell is defined as the cutting side, and preferably, the end face of the cutting side is a plane.

[0034] Further, in order to better cut off the lock tongue metal sheet by the piston, the cutting side of the piston 4 is provided with a knife tip structure 5 as a cutting edge, which can more easily cut off the lock tongue metal sheet 2.

[0035] One side of the piston 4 is the cutting side, the side surface of the cutting side is provided with a knife tip structure 5, the other side is located in the cavity, and the cavity space on one side of the side surface is used to accommodate gas. The space is provided with a gas generator 6, and the gas generator 6 is fixed on the cavity wall of the cavity 3.

[0036] The gas generator 6 can use the existing safety belt pretensioning gas generator, and the specific structure will not be described in detail here.

[0037] The gas generator 6 is connected with the control circuit 7, the control circuit 7 can control the current input of the gas generator 6, when the input current is greater than the trigger current of the gas generator 6, the heat generated by the current will make the powder in the gas generator detonate, the detonated powder will generate gas pressure exceeding the set pressure value in the cavity on one side of the piston 4, and drive the piston to move towards the lock tongue metal sheet 2 in the lock body, and then cut the lock tongue metal sheet 2 by the blade tip structure 5.

[0038] In order to prevent gas leakage, the piston 4 and the inner cavity surface of the cavity 3 are provided with a sealing ring, the sealing ring is fixed on the inner cavity surface of the cavity 3, and the sealing ring and the piston 4 have a certain friction force, the friction force makes the piston 4 only be driven to move when the gas pressure generated by the gas generator exceeds the set pressure value, and the piston will not move in the normal state. Moreover, the gas pressure generated by the gas generator can drive the piston 4 to move and cut the lock tongue metal sheet 2.

[0039] Preferably, the sealing ring can use the existing rubber sealing ring, which will not be described in detail here.

[0040] The control circuit 7 is connected with the gas generator 6, and is used for supplying power to the gas generator 6, the control circuit 7 includes a first loop and a second loop connected in parallel, the first loop and the second loop are connected in parallel and then connected to a total loop through a switching switch, and a power supply and the gas generator are connected in series and then connected to the total loop.

[0041] In the embodiment, the power supply can use the 12V storage battery carried by the automobile itself, and no additional power supply is needed.

[0042] The switching switch uses the existing button type switching switch, the switching switch is used to be installed at a set position on the periphery of the automobile window, and is arranged close to the automobile window. After the rescue personnel break the automobile window, the button type switching switch can be conveniently operated without opening the door to operate the button type switching switch.

[0043] Preferably, a protective cover is arranged on the periphery of the button type switching switch to prevent the passenger from mistakenly touching the button type switching switch.

[0044] In the embodiment, the protective cover can use the existing emergency switch protective cover in the automobile or other vehicles, which will not be described in detail here.

[0045] The first resistance is arranged in series on the first circuit, and the second resistance is arranged in series on the second circuit, the resistance of the first resistance is greater than the resistance of the second resistance, in the normal state, the switching switch is turned on the first circuit, the first resistance makes the current in the control circuit less than the trigger current of the gas generator, the gas generator 6 does not work, after the switching switch is turned on the second circuit, the resistance of the second resistance makes the current in the control circuit greater than the trigger current of the gas generator, the gas generator 6 is triggered to work.

[0046] In the embodiment, the first resistance is a 10K resistance, after the first circuit is turned on, the current of the entire control circuit 7 is 12uA, the working current ensures that the control circuit 7 works normally and does not cause false triggering of the gas generator 6, the second resistance is a 6.8Ω resistance, after the second circuit is turned on, the current in the control circuit is 1.75A, under the magnetic motor, the temperature of the wire harness near the gunpowder of the gas generator 6 rapidly and substantially rises, and the trigger requirement of the gunpowder point explosion in the gas generator 6 can be reached within 0.5ms.

[0047] The embodiment improves the existing lock catch mechanism, and the remaining structure of the lock catch mechanism can adopt the existing technology, which is not described in detail here.

[0048] When an emergency danger occurs, the rescue personnel can trigger the gas generator 6 through the button-type switching switch, the gas generator 6 can generate a large amount of high-pressure gas in the cavity 3, so as to drive the piston 4 to move towards the lock catch body 1, the cutting side of the piston 4 will cut off the lock tongue metal sheet of the lock catch body 1, so as to realize the separation of the lock catch mechanism and the safety belt, and further realize the cutting of the safety belt, avoid the problem that the safety belt cannot be unfastened due to the abnormal mechanical structure of the lock tongue and the lock catch when the danger occurs, save the rescue and escape time, and ensure the safety of the passengers.

[0049] Embodiment 2

[0050] The embodiment provides an automobile safety belt device, which comprises a safety belt, a safety belt winding mechanism, a lock tongue mechanism and a lock catch mechanism, the safety belt is connected with the safety belt winding mechanism, the movable end of the safety belt is connected with the lock tongue mechanism, the safety belt, the safety belt winding mechanism and the lock tongue mechanism can adopt the existing technology, and the specific structure is not described in detail here, and the lock catch mechanism matched with the lock tongue mechanism is further included, and the lock catch mechanism adopts the automobile safety belt lock catch mechanism in the embodiment 1.

[0051] Further, as Figure 3As shown, in order to facilitate the piston 4 to cut the lock tongue sheet metal 2 of the lock tongue mechanism, the part of the lock tongue sheet metal 2 for contacting the piston blade tip structure is provided with a groove 8, so that the cutting part of the lock tongue sheet metal 2 is thinned, and the lock tongue sheet metal 2 is more convenient to cut by the blade tip structure 5.

[0052] Preferably, the depth of the groove 8 is 1 mm, which can ensure that the lock tongue mechanism effectively bears a pulling force of not less than 15 KN while being thinned.

[0053] In other embodiments, a plurality of through holes can also be provided at the cutting position of the lock tongue sheet metal 2 to ensure that the piston can smoothly cut the lock tongue.

[0054] The through holes are circular holes or square holes or other shape holes, which can be set by those skilled in the art according to actual needs, and the plurality of through holes are distributed along the direction perpendicular to the movement direction of the lock tongue sheet metal 2 to form the cutting position of the piston 4.

[0055] The setting position of the groove 8 can be determined according to the relative position relationship when the lock catch mechanism and the lock tongue sheet metal are matched.

[0056] In an embodiment, one end of the lock tongue sheet metal 2 is defined as a lock catch insertion end, and the other end is defined as a safety belt connecting end. In the lock hole of the lock tongue sheet metal 2, the edge of the lock hole close to the lock catch insertion end is a bottom edge, and the edge close to the safety belt connecting end is a top edge. The groove is provided at a set position between the bottom edge and the safety belt connecting end of the lock tongue sheet metal, and the set position is such that the position of the groove 8 needs to avoid the related parts in the lock catch body after the lock tongue is inserted into the lock catch body. Preferably, the groove 8 is provided between the bottom edge and the top edge of the lock hole and close to the top edge.

[0057] After the cutting position of the lock tongue sheet metal is determined, the mounting position of the cavity on the shell can be determined according to the cutting position of the lock tongue sheet metal 2, which will not be described in detail here, as long as the position of the blade tip structure of the piston corresponds to the position of the groove after the lock tongue sheet metal is matched with the lock tongue mechanism.

[0058] The remaining structure of the automobile safety belt device can use the existing technology, which will not be described in detail here.

[0059] Example 3

[0060] The embodiment provides a working method of the automobile safety belt device in Example 2.

[0061] Under normal circumstances, the working method of the automobile safety belt mechanism of the embodiment is the same as that of the conventional automobile safety belt mechanism. The lock tongue sheet 2 of the lock tongue mechanism is inserted into the lock catch mechanism, realizing the fixation of the lock tongue mechanism and the lock catch mechanism, and can be recycled throughout the vehicle life cycle.

[0062] When a special emergency occurs, especially after the vehicle catches fire, the vehicle door cannot be opened, the vehicle occupant is trapped and even unconscious, and does not have the ability to press the unlocking button independently, and at the same time, the scene outside the vehicle does not have the ability to disconnect the safety belt, the rescue personnel break the vehicle window, then break the protective cover outside the switching switch, and then press the switching switch, so that the second return circuit is turned on, the internal resistance of the entire control circuit wire harness is very small, and the wire harness is in a short-circuit state. A large short-circuit current is immediately generated, and the heat generated by the current will ignite the gunpowder inside the gas generator 6 within 0.5 ms. The ignited gunpowder will generate high pressure exceeding the set pressure value in the cavity, driving the piston 4 to move. The piston 4 cuts the lock tongue sheet 2 at the groove 8 position of the lock tongue sheet 2 through the knife tip structure 5, and cuts off the lock tongue sheet 2. The lock tongue is quickly separated from the lock catch mechanism under the action of the return force of the safety belt winding mechanism.

[0063] The use method of the safety belt device of the embodiment is only used when the vehicle is in danger, and the safety belt can be effectively disconnected when the personnel are trapped in the seat, which is convenient for personnel to escape from the dangerous vehicle and save lives.

[0064] Embodiment 4

[0065] The embodiment provides an automobile provided with the safety belt device described in Embodiment 2, wherein a 12V storage battery carried by the automobile itself is used as the power supply of the control circuit, and an additional power supply is not required. The button-type switching switch is installed in the automobile and located at a set position outside the periphery of the automobile window. The set position can be set according to actual needs, which meets the installation space requirement and is convenient for rescue personnel to operate after breaking the window. The remaining structure of the automobile can adopt the prior art, and will not be described in detail.

[0066] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A car seatbelt buckle mechanism, comprising a buckle body, characterized in that, The cover of the latch body is fixed with a cavity, and a piston is slidably installed in the cavity. One side of the piston serves as the cutting side. The cutting side passes through the cavity and the cover of the latch body and extends into the interior of the latch body. The position of the cutting side corresponds to the position in the latch body used to accommodate the latch tongue. The other side of the piston is provided with a gas generator fixed in the cavity. The gas generator is connected to the control circuit. The gas generator can drive the gas pressure in the chamber on one side of the piston to exceed the set value so that the piston moves toward the buckle body. The cutting side of the piston can cut the metal plate of the latch inside the buckle body to cut the seat belt off from the buckle body. The control circuit includes a first circuit and a second circuit connected in parallel. The first circuit and the second circuit are connected to the main circuit through a switching switch. The gas generator and the power supply are connected in series in the main circuit. A first resistor is connected in series in the first circuit, and a second resistor is connected in series in the second circuit. The resistance of the first resistor is greater than that of the second resistor so that the gas generator is not triggered when the first circuit is turned on, but the gas generator is triggered when the second circuit is turned on. The switch is installed at a designated location on the outside of the car window, and a protective cover is provided around the switch.

2. The automotive seatbelt buckle mechanism as described in claim 1, characterized in that, A sealing ring is provided between the piston and the inner cavity surface of the cavity.

3. The automotive seatbelt buckle mechanism as described in claim 1, characterized in that, The piston has a cutting edge on its cutting side.

4. The automotive seatbelt buckle mechanism as described in claim 1, wherein the power source is a vehicle battery.

5. A car seat belt device, comprising a seat belt, a seat belt rewinding mechanism, a locking tongue mechanism, and a buckle mechanism, wherein the seat belt is connected to the seat belt rewinding mechanism, and the end of the seat belt used to connect to the buckle mechanism is connected to the locking tongue mechanism, characterized in that, The buckling mechanism is the same as the automotive seat belt buckling mechanism described in any one of claims 1-4.

6. A car seatbelt device as described in claim 5, characterized in that, The locking tongue mechanism has a groove at the position where it mates with the cutting side of the piston, so that the piston can cut the locking tongue metal sheet more effectively.

7. A car seatbelt device as described in claim 6, characterized in that, One end of the latch metal sheet serves as the buckle insertion end, and the other end serves as the seat belt connection end. In the lock hole on the latch metal sheet, the edge of the lock hole near the buckle insertion end is the bottom edge, and the edge near the seat belt connection end is the top edge. The groove is set between the bottom edge and the seat belt connection end of the latch metal sheet.

8. A method for operating the automotive seatbelt device according to claim 5, characterized in that, When the locking mechanism and the latch mechanism are engaged, the control circuit triggers the gas generator, which generates high-pressure gas exceeding the set pressure in the cavity. This gas pushes the piston toward the locking body, and the piston uses its cutting side to cut the latch metal plate of the latch mechanism, thus disconnecting the seat belt from the locking mechanism.

9. A car, characterized in that, The vehicle is equipped with the seat belt device as described in claim 5.

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