Automobile safety belt lock catch mechanism, safety belt device, method and automobile

Abstract

The invention relates to an automobile safety belt lock catch mechanism, a safety belt device, a method and an automobile. The automobile safety belt lock catch mechanism comprises a lock catch body, a cavity is fixed to a housing of the lock catch body, a piston is arranged in the cavity in a sliding mode, one side of the piston serves as a cutting side, and the cutting side penetrates through the cavity and the housing of the lock catch body and then extends into the lock catch body; the position of the cutting side corresponds to the position, used for containing a spring bolt, in the lock catch body, and a gas generator fixed to the cavity is arranged on the other side of the piston and connected with the control circuit. The gas generator can drive gas pressure in a cavity on one side of the piston to exceed a set value so that the piston can move towards the lock catch body, and the cutting side of the piston can cut off a spring bolt metal sheet in the lock catch body so that the safety belt and the lock catch body can be cut off. By the adoption of the lock catch mechanism, rescue time and escape time under the dangerous condition are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle seat belts, and particularly to a vehicle seat belt buckle mechanism, a seat belt device, a method and a vehicle. Background Art

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

[0003] In the event of a vehicle safety accident, the escape time is particularly important. However, in many cases, due to the mechanical structure of the seat belt getting stuck after the accident, the seat belt cannot be unfastened, and the person is trapped on the seat, missing the escape time, resulting in a threat to life safety. Currently, vehicle seat belts mainly still adopt traditional mechanical structures, with a tongue and a buckle mechanically connected. When unlocking, it is necessary to press an unlocking button to release the internal locking structure.

[0004] The above structure may cause abnormalities in the internal mechanical structure of the seat belt after an accident, and the seat belt cannot be unfastened by pressing. In addition, after a safety accident, for external rescue personnel, when the car door cannot be opened, they cannot reach the seat belt unlocking button; all of these will increase the rescue time and affect the life safety of passengers. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a vehicle seat belt buckle mechanism, a seat belt device, a method and a vehicle, which can cut off the tongue of the seat belt in case of an emergency, so that the seat belt is disconnected, avoiding the situation where people are trapped on the seat due to the seat belt and missing the escape time when a danger occurs.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a vehicle seat belt buckle mechanism, including a buckle body. A cavity is fixed to the housing of the buckle body. A piston is slidably disposed in the cavity. One side of the piston is a cutting side, which passes through the cavity and the housing of the buckle body and extends into the interior of the buckle body. And the position of the cutting side corresponds to the position in the buckle body for accommodating the tongue. On the other side of the piston, there is a gas generator fixed to the cavity. The gas generator is connected to a control circuit;

[0008] 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 buckle body. The cutting side of the piston can cut off the tongue metal sheet in the buckle body to cut off the seat belt from the buckle body.

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

[0010] Optionally, a cutting edge is provided on the cutting side of the piston to facilitate better cutting of the locking tongue.

[0011] Optionally, the control circuit includes a first loop and a second loop arranged in parallel. The first loop and the second loop are connected to the main loop through a switching switch. A gas generator and a power source are connected in series in the main loop. A first resistor is connected in series in the first loop, and a second resistor is connected in series in the second loop. The resistance value of the first resistor is greater than that of the second resistor so that the gas generator is not triggered when the first loop is turned on, and the gas generator is triggered when the second loop is turned on.

[0012] Further, the switching switch is used to be arranged at a set position on the outer periphery of the car window, and a protective cover is arranged on the outer periphery of the switching switch.

[0013] Optionally, the power source uses a vehicle battery.

[0014] In a second aspect, an embodiment of the present invention provides an automobile seat belt device, including a seat belt, a seat belt retractor mechanism, a locking tongue mechanism, and a buckle mechanism. The seat belt is connected to the seat belt retractor mechanism. A locking tongue mechanism is connected to the end of the seat belt for connecting to the buckle mechanism. The buckle mechanism adopts the automobile seat belt buckle mechanism described in the first aspect.

[0015] Optionally, a groove is arranged at the position where the locking tongue metal piece of the locking tongue mechanism is used to cooperate with the cutting side of the piston, so that the piston can better cut the locking tongue metal piece.

[0016] Optionally, one end of the locking tongue metal piece is used as the buckle insertion end, and the other end is used as the seat belt connection end. In the locking hole on the locking tongue metal piece, the edge of the locking hole close to the buckle insertion end is the bottom edge, and the edge close to the seat belt connection end is the top edge. The groove is arranged between the bottom edge and the seat belt connection end of the locking tongue metal piece.

[0017] In a third aspect, an embodiment of the present invention provides a working method of the automobile seat belt device described in the second aspect: when the buckle mechanism and the locking tongue mechanism are in a matching state, the control circuit triggers the gas generator. The gas generator generates high-pressure gas exceeding the set pressure in the cavity, and pushes the piston to move towards the direction of the buckle body. The piston uses the cutting side to cut off the locking tongue metal piece of the locking tongue mechanism, so that the seat belt is disconnected from the buckle mechanism.

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

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

[0020] 1. The seat belt buckle mechanism of the present invention is provided with a cavity. Inside the cavity, there is a piston. One side of the piston serves as the cutting side and extends into the buckle body. On the other side, there is a gas generator. The position of the cutting side of the piston corresponds to the position in the buckle body that accommodates the tongue metal piece. When an emergency occurs, the rescuer can trigger the gas generator through a control circuit. The gas generator can generate a large amount of high-pressure gas in the cavity, thereby pushing the piston towards the buckle body. The cutting side of the piston cuts off the tongue metal piece inserted into the buckle body, thus 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 abnormal mechanical structures of the tongue and the buckle in case of danger, saving rescue and escape time, and ensuring the safety of passengers' lives.

[0021] 2. For the seat belt buckle mechanism of the present invention, the changeover switch is used to be set at a set position around the car window. After the rescuer breaks the car window from the outside, the changeover switch can be operated to start the gas generator without opening the car door, reducing the rescue time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The schematic diagrams in the specification forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0023] Figure 1 is the schematic diagram of the overall structure of Embodiment 1 of the present invention Figure 1 ;

[0024] Figure 2 is the schematic diagram of the overall structure of Embodiment 1 of the present invention Figure 2 ;

[0025] Figure 3 is the schematic diagram of the groove setting of Embodiment 2 of the present invention;

[0026] Among them, 1. buckle body, 2. tongue metal piece, 3. cavity, 4. piston, 5. tip structure, 6. gas generator, 7. control circuit, 8. groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Embodiment 1

[0028] This embodiment provides an automotive seat belt buckle mechanism, as Figures 1 - 2As shown in the figure, it includes a buckle body 1. The buckle body 1 can adopt the structure of the current buckle body for automotive seat belts, including a cover shell. Inside the cover shell, there is a locking component for locking the tongue metal sheet 2. The cover shell is also equipped with a button. The metal sheet of the tongue can be inserted into the inside of the cover shell, and then the locking component can be inserted into the locking hole of the tongue metal sheet to lock and fix the tongue metal sheet. After pressing the button, the locking component can leave the locking hole to release the locking state of the tongue metal sheet. The tongue metal sheet 2 is pushed out of the cover shell under the action of the spring inside the cover shell, realizing the separation of the buckle mechanism and the tongue.

[0029] The above technology can adopt the existing technology, and its further technical details will not be described in detail here. The current buckle mechanism is a pure mechanical structure. In case of dangerous situations such as car accidents, it is easy to cause abnormal structure, and when pressing the button, the locking state between the tongue and the buckle mechanism cannot be released, resulting in delays in the rescue and escape time of passengers.

[0030] To solve this problem, in this embodiment, the current buckle mechanism is improved so that in case of dangerous situations such as accidents, rescue personnel or passengers can easily cut off the connection between the seat belt and the buckle mechanism, facilitating the rescue and escape of passengers.

[0031] Specifically, a cavity 3 is fixed on the outer side of the cover shell. Inside the cavity 3, there is a piston 4. The piston 4 is slidably connected to the inner cavity surface of the cavity, and the piston 4 can perform a linear motion towards or away from the buckle body 1.

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

[0033] In this embodiment, the side of the piston 4 extending into the inside of the cover shell is defined as the cutting side. Preferably, the end face of the cutting side is a plane.

[0034] Furthermore, in order to enable the piston to better cut off the tongue metal sheet, a tip structure 5 is provided on the side surface of the cutting side of the piston 4 as a cutting edge, and through the tip structure 5, it is easier to cut off the tongue metal sheet 2.

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

[0036] The gas generator 6 can adopt the existing gas generator for seat belt pre - tightening, and its specific structure will not be described in detail here.

[0037] The gas generator 6 is connected to the control circuit 7. The control circuit 7 can control the current passing through the gas generator 6. When the passing current is greater than the trigger current of the gas generator 6, the heat generated by the current will cause the gunpowder in the gas generator to explode. The exploded gunpowder will generate a gas pressure exceeding the set pressure value inside the cavity on one side of the piston 4, pushing the piston towards the locking tongue metal sheet 2 inside the lock body, and then using the tip structure 5 to cut off the locking tongue metal sheet 2.

[0038] To prevent gas leakage, a sealing ring is provided between the piston 4 and the inner cavity surface of the cavity 3. The sealing ring is fixed on the inner cavity surface of the cavity 3, and there is a certain frictional force between the sealing ring and the piston 4. This frictional force causes the piston 4 to be pushed to move only when the gas generator is triggered to generate a gas pressure exceeding the set pressure value, and the piston will not move under normal conditions. Moreover, the gas pressure generated by the gas generator can not only push the piston 4 to move, but also push the piston to cut off the locking tongue metal sheet 2.

[0039] Preferably, the sealing ring can adopt an existing rubber sealing ring, and no detailed description will be given here.

[0040] The control circuit 7 is connected to the gas generator 6 for supplying power to the gas generator 6. The control circuit 7 includes a first circuit and a second circuit arranged in parallel. After the first circuit and the second circuit are connected in parallel, they are connected to the main circuit through a switching switch, and the power supply and the gas generator are connected in series to enter the main circuit.

[0041] In this embodiment, the power supply can adopt the 12V storage battery carried by the vehicle itself, and there is no need to configure an additional power supply.

[0042] The switching switch adopts an existing push-button type switching switch. The switching switch is used to be installed at a set position on the periphery of the vehicle window, close to the vehicle window. After the rescue personnel break the vehicle window, they can conveniently operate the push-button type switching switch without having to open the vehicle door to operate the push-button type switching switch.

[0043] Preferably, a protective cover is arranged on the outer periphery of the push-button type switching switch to prevent passengers from accidentally touching the push-button type switching switch.

[0044] In this embodiment, the protective cover can adopt an existing emergency switch protective cover in a vehicle or other means of transportation, and no detailed description will be given here.

[0045] A first resistor is serially arranged on the first circuit, and a second resistor is serially arranged on the second circuit. The resistance of the first resistor is greater than that of the second resistor. Under normal conditions, the changeover switch conducts the first circuit, and the first resistor makes the current in the control circuit less than the trigger current of the gas generator, so the gas generator 6 does not work. After the changeover switch conducts the second circuit, the resistance value of the second resistor makes the current in the control circuit greater than the trigger current of the gas generator, and the gas generator 6 is triggered to work.

[0046] In this embodiment, the first resistor is a 10K resistor. After the first circuit is conducted, the current of the entire control circuit 7 is 12uA. This working current ensures the normal operation of the control circuit 7 and will not cause mis-triggering of the gas generator 6. The second resistor is a 6.8Ω resistor. After the second circuit is conducted, the current in the control circuit is 1.75A. Under the magneto, the temperature of the wire harness near the gunpowder of the gas generator 6 rises rapidly and significantly, and can reach the trigger requirement for the ignition of the gunpowder in the gas generator 6 within 0.5ms.

[0047] This embodiment is improved on the basis of the existing buckle mechanism. The rest of the structure of the buckle mechanism can adopt the existing technology and will not be described in detail here.

[0048] When using the buckle mechanism of this embodiment, in case of an emergency dangerous situation, the rescue personnel can trigger the gas generator 6 through the push-button changeover switch. The gas generator 6 can generate a large amount of high-pressure gas in the cavity 3, thereby pushing the piston 4 towards the direction of the buckle body 1. The cutting side of the piston 4 cuts off the locking tongue metal sheet of the buckle body 1, thus 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 abnormal mechanical structures of the locking tongue and the buckle in case of a dangerous situation, saving the rescue and escape time, and ensuring the life safety of the passengers.

[0049] Embodiment 2

[0050] This embodiment provides an automobile seat belt device, which includes a seat belt, a seat belt retractor mechanism, a locking tongue mechanism, and a buckle mechanism. The seat belt is connected to the seat belt retractor mechanism, and the movable end of the seat belt is connected with the locking tongue mechanism. The seat belt, the seat belt retractor mechanism, and the locking tongue mechanism can adopt the existing technology and their specific structures will not be described in detail here. It further includes a buckle mechanism that matches the locking tongue mechanism, and the buckle mechanism adopts the automobile seat belt buckle mechanism described in Embodiment 1.

[0051] Further, as Figure 3As shown in the figure, in order to make it easier for the piston 4 to cut the locking tongue metal sheet 2 of the locking tongue mechanism, a groove 8 is provided at the part of the locking tongue metal sheet 2 that contacts the cutting tip structure of the piston, so that the thickness of the cutting part on the locking tongue metal sheet 2 is reduced, making it more convenient to use the cutting tip structure 5 to cut the locking tongue metal sheet 2.

[0052] Preferably, the depth of the groove 8 is 1 mm. While reducing the thickness, it can ensure that the locking tongue mechanism can effectively withstand a tensile force of not less than 15 KN.

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

[0054] The through holes can be circular holes, square holes or holes of other shapes, which can be set by those skilled in the art according to actual needs. The multiple through holes are distributed along the direction perpendicular to the movement direction of the locking tongue metal sheet 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 mechanism and the locking tongue metal sheet cooperate.

[0056] In one embodiment, one end of the locking tongue metal sheet 2 is defined as the lock buckle insertion end, and the other end is defined as the seat belt connection end. In the lock hole on the locking tongue metal sheet 2, the edge of the lock hole close to the lock buckle insertion end is the bottom edge, and the edge close to the seat belt connection end is the top edge. The groove is set at a set position between the bottom edge and the seat belt connection end of the locking tongue metal sheet, and this set position ensures that after the locking tongue is inserted into the lock buckle body, the position of the groove 8 needs to avoid the relevant components in the lock buckle body. Preferably, the groove 8 is set between the bottom edge and the top edge of the lock hole and is close to the top edge.

[0057] After determining the cutting position of the locking tongue metal sheet, the installation position of the cavity on the housing can be determined according to the cutting position of the locking tongue metal sheet 2. Details are not described here. As long as the locking tongue metal sheet and the locking tongue mechanism are properly matched, the position of the cutting tip structure of the piston corresponds to the position of the groove.

[0058] The rest of the structure of the vehicle seat belt device can adopt the existing technology, and details are not described here.

[0059] Embodiment 3

[0060] This embodiment provides a working method of the vehicle seat belt device described in Embodiment 2:

[0061] Under normal circumstances, the working method of the vehicle seat belt mechanism in this embodiment is the same as that of the traditional vehicle seat belt mechanism. The locking tongue metal sheet 2 of the locking tongue mechanism is inserted into the buckle mechanism, realizing the fixation of the locking tongue mechanism and the buckle mechanism, and it can be recycled throughout the vehicle life cycle.

[0062] When a special emergency occurs, especially after the vehicle catches fire, the car door cannot be opened, the vehicle occupants are trapped or even unconscious, and they do not have the ability to independently press the unlocking button. At the same time, in scenarios where the seat belt cannot be disconnected outside the vehicle, the rescue personnel break the car window, then break the protective cover around the changeover switch, and then press the changeover switch to make the second circuit conductive. The internal resistance of the entire control circuit harness is very small, and the harness is in an approximate short-circuit state, immediately generating a very large short-circuit current. The heat generated by the current will detonate the gunpowder inside the gas generator 6 within 0.5 ms. The detonated gunpowder will generate a high pressure exceeding the set pressure value in the cavity, pushing the piston 4 to move. The piston 4 cuts the groove 8 position of the locking tongue metal sheet 2 through the tip structure 5, cutting off the locking tongue metal sheet 2, and the locking tongue quickly separates from the buckle mechanism under the action of the pulling force of the seat belt retractor mechanism.

[0063] The usage method of the seat belt device in this embodiment is only applicable when a dangerous scenario occurs in the vehicle. When a person is trapped by the seat belt in the seat, the seat belt can be effectively disconnected to facilitate the person to escape from the dangerous vehicle and save their life safety.

[0064] Embodiment 4

[0065] This embodiment provides a vehicle equipped with the seat belt device described in Embodiment 2. The 12V battery carried by the vehicle itself is used as the power source of the control circuit, and no additional power source needs to be set. The push-button changeover switch is installed inside the vehicle and is located at a set position around the car window. The set position can be set according to actual needs. While meeting the installation space requirements, it is convenient for rescue personnel to operate after breaking the car window. Details are not described here. The remaining structure of the vehicle can adopt the existing technology, and further details are not described here.

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

Claims

1. A car seat belt buckle mechanism, comprising a buckle body, characterized in that: The cover of the lock body is fixed with a cavity, a piston is slidably arranged in the cavity, one side of the piston is used as a cutting side, the cutting side passes through the cavity and the cover of the lock body and then extends into the lock body, and the position of the cutting side corresponds to the position in the lock body for accommodating the lock tongue, and the other side of the piston is provided with a gas generator fixed in the cavity, and the gas generator is connected to the control circuit; The gas generator can drive the gas pressure in the cavity on one side of the piston to exceed the set value so that the piston moves toward the lock body. The cutting side of the piston can cut off the lock tongue metal sheet in the lock body to cut off the seat belt from the lock body.

2. A car seat belt buckle mechanism as claimed in claim 1, characterized in that: A sealing ring is arranged between the piston and the inner surface of the cavity.

3. The automobile seat belt buckle mechanism according to claim 1, characterized in that: The cutting side of the piston is provided with a cutting edge.

4. A car seat belt buckle mechanism as claimed in claim 1, wherein the control circuit comprises a first circuit and a second circuit arranged in parallel, the first circuit and the second circuit are connected to a total circuit through a switching switch, a gas generator and a power supply are connected in series to the total circuit, a first resistor is connected in series to the first circuit, and a second resistor is connected in series to the second circuit, and the resistance value of the first resistor is greater than the second resistor so that the gas generator is not triggered when the first circuit is turned on, and the gas generator is triggered when the second circuit is turned on; Furthermore, the switching switch is used to be arranged at a set position on the periphery of a car window, and a protective cover is arranged on the periphery of the switching switch.

5. A car seat belt buckle mechanism as claimed in claim 4, wherein the power source is a vehicle battery.

6. A car safety belt device, comprising a safety belt, a safety belt reeling mechanism, a locking tongue mechanism and a buckle mechanism, wherein the safety belt is connected to the safety belt reeling mechanism, and the end of the safety belt used for connecting to the buckle mechanism is connected to the locking tongue mechanism, characterized in that: The locking mechanism adopts the automobile safety belt locking mechanism according to any one of claims 1 to 5.

7. A vehicle safety belt device as claimed in claim 6, characterized in that: The locking tongue metal sheet of the locking tongue mechanism is provided with a groove at a position where the locking tongue metal sheet cooperates with the cutting side of the piston, so that the piston can better cut off the locking tongue metal sheet.

8. A vehicle safety belt device as claimed in claim 7, characterized in that: One end of the lock tongue metal sheet serves as a lock buckle insertion end, and the other end serves as a safety belt connection end. In the lock hole on the lock tongue metal sheet, the edge of the lock hole close to the lock buckle insertion end is the bottom edge, and the edge close to the safety belt connection end is the top edge. The groove is arranged between the bottom edge and the safety belt connection end of the lock tongue metal sheet.

9. An operating method of a vehicle safety belt device according to claim 6, characterized in that: When the lock mechanism and the lock tongue mechanism are in cooperation, the control circuit triggers the gas generator, and the gas generator generates high-pressure gas exceeding the set pressure in the cavity, pushing the piston to move toward the lock body. The piston uses the cutting side to cut off the lock tongue metal sheet of the lock tongue mechanism, thereby disconnecting the seat belt from the lock mechanism.

10. An automobile, characterized in that: A vehicle seat belt device according to claim 6 is provided.

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