Seat belt buckle fastening detection device

Abstract

The invention relates to a safety belt buckle fastening detection device, comprising a PCB board and a slider, wherein a normally open copper foil, a common copper foil and a normally closed carbon film are arranged on the PCB board, a reed is connected to the slider, two contact pins are arranged on the reed, the two contact pins abut against the PCB board to form two contact points, a vehicle-mounted indicator light and a power supply are connected in series between the normally open copper foil and the common copper foil, when the two contact pins of the reed abut against the normally open copper foil and the common copper foil respectively, the indicator light is lit, a voltage-dividing resistor and a power supply are connected in series between the normally closed carbon film and the common copper foil, when the two contact pins of the reed abut against the normally closed carbon film and the common copper foil respectively, a central control chip of the automobile detects the voltage between the voltage-dividing resistor and the normally closed carbon film, and then calculates the resistance value of the normally closed carbon film connected to the circuit, and a push handle is connected to the slider, and the push handle is used to be connected to a release device in a safety belt latch.

Description

Technical Field

[0001] The invention belongs to the technical field of devices, and in particular relates to a safety belt buckle fastening detection device. Background Art

[0002] Seat belts play a vital role in protecting the life safety of passengers during the driving process. In the event of an accident, if the seat belts can be tightened in the first time to absorb most of the impact force, the safety factor of the passengers will be greatly improved. However, the connection structure of the seat belts causes it to have a certain amount of loose space. That is, when an accident occurs, the passenger moves forward and pulls the seat belts to make the seat belts quickly extend a certain distance before the seat belts self-locking and tightening functions are triggered. At this time, the first impact time has passed, and the passenger may hit the airbag heavily, still causing relatively serious injuries.

[0003] Therefore, if the triggering time of the seat belt's self-locking and tightening functions can be shortened, the safety factor of the passengers will be greatly improved.

[0004] The invention patent with the patent number "2007800228959" discloses a "patent name is a seat belt buckle tightening detection device and a seat belt buckle", which describes in detail the structure of the seat belt latch and also discloses a PCB board for detecting the locking state of the buckle, but the patent does not have the function of shortening the triggering time of the self-locking function and tightening function of the seat belt. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a seat belt buckle fastening detection device, which is applied in a seat belt latch to shorten the triggering time of the seat belt self-locking function and the tightening function, thereby improving the safety factor of passengers.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a safety belt buckle fastening detection device, including a PCB board, and also including a slider slidably sleeved on the PCB board, the front side of the PCB board is provided with a normally open copper foil, a common copper foil and a normally closed carbon film in sequence and at equal intervals along the sliding direction of the slider, the slider is connected to a reed, the reed is provided with two contact pins abutting against the front side of the PCB board, the two contact pins are arranged along the sliding direction of the slider, the two contact pins abut against the PCB board to form two contact points, and the distance between the two contacts is less than the distance between the normally open copper foil and the normally closed carbon film. The normally open copper foil and the common copper foil are used to connect the vehicle indicator light and the power supply in series. When the two contact pins of the reed are respectively in contact with the normally open copper foil and the common copper foil, the indicator light is turned on. The normally closed carbon film and the common copper foil are used to connect the voltage-dividing resistor and the power supply in series. When the two contact pins of the reed are respectively in contact with the normally closed carbon film and the common copper foil, the central control chip of the car detects the voltage between the voltage-dividing resistor and the normally closed carbon film, and then calculates the resistance value of the normally closed carbon film connected to the circuit. A push handle is connected to the slider, and the push handle is used to connect with the release device in the seat belt latch.

[0007] As a preferred solution, a convex strip is provided between the normally-open copper foil and the common copper foil, and a convex strip is also provided between the normally-closed carbon film and the common copper foil, and the convex strip is provided perpendicular to the sliding direction of the slider.

[0008] As a preferred solution, the cross-section of the convex strip is triangular, semicircular or arched.

[0009] As a preferred solution, the slider is tubular and sleeved on the PCB board. The inner walls on both sides of the slider are provided with slide grooves corresponding to the two sides of the PCB board. The two sides of the PCB board are respectively embedded in the corresponding slide grooves. The inner top surface of the slider is opposite to the upper surface of the PCB board and there is a gap. The spring leaf 6 is fixedly connected to the inner top surface of the slider.

[0010] The beneficial effects of the present invention are as follows: the present invention sets a normally closed carbon film on the PCB board to enable the central control chip of the car to detect the depth of the seat belt buckle inserted into the seat belt latch, and judge whether the seat belt is subjected to tension. When the seat belt is subjected to abnormal tension, the central control chip controls the seat belt reeling mechanism to tighten the seat belt to improve the personal safety of passengers. Compared with the traditional triggering method, the self-locking and tightening of the seat belt is triggered by the change in the depth of the seat belt buckle in the seat belt latch, and the time lag is shorter, which can greatly improve the safety factor of passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0012] Figure 1 is a front view of the detection device of the present invention;

[0013] Figure 2 is a front view of the PCB board of the present invention;

[0014] Figure 3 is a cross-sectional view of the detection device when the seat belt buckle is not inserted into the seat belt latch;

[0015] Figure 4 is a cross-sectional view of the detection device when the seat belt buckle and the seat belt latch are at a critical point between unlocked and locked;

[0016] Figure 5 is a cross-sectional view of the detection device when the seat belt buckle and the seat belt latch are locked;

[0017] Figure 6 is the end view of the slider;

[0018] Figure 1 to Figure 6 In: 1. PCB board, 2. slider, 3. Normally open copper foil, 4. Common copper foil, 5. Normally closed carbon film, 6. Reed, 601, contact pin, 7. indicator light, 8. power supply, 9. voltage divider resistor, 10. push handle, 11. convex strip, 12. slide groove, 13. car central control chip. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 to Figure 6 As shown, the seat belt buckle fastening detection device includes a PCB board 1, characterized in that it also includes a slider 2 slidably sleeved on the PCB board 1, and the front side of the PCB board 1 is provided with a normally open copper foil 3, a common copper foil 4 and a normally closed carbon film 5 at equal intervals in sequence along the sliding direction of the slider 2, and a reed 6 is connected to the slider 2, and the reed 6 is provided with two contact pins 601 abutting against the front side of the PCB board 1, and the two contact pins 601 are arranged along the sliding direction of the slider 2, and the two contact pins 601 abut against the PCB board 1 to form two contact points, and the distance between the two contacts is smaller than the distance between the normally open copper foil 3 and the normally closed carbon film 5 and larger than the distance between the normally open copper foil 3 and the common copper foil 5. The spacing between the common copper foils 4, the normally open copper foil 3 and the common copper foil 4 are used to connect the vehicle indicator light 7 and the power supply 8 in series. When the two contact pins 601 of the reed 6 are respectively in contact with the normally open copper foil 3 and the common copper foil 4, the indicator light 7 is lit. The normally closed carbon film 5 and the common copper foil 4 are used to connect the voltage-dividing resistor 9 and the power supply 8 in series. When the two contact pins 601 of the reed 6 are respectively in contact with the normally closed carbon film 5 and the common copper foil 4, the automobile central control chip 13 detects the voltage between the voltage-dividing resistor 9 and the normally closed carbon film 5, and then calculates the resistance value of the normally closed carbon film 5 connected to the circuit. A push handle 10 is connected to the slider 2, and the push handle 10 is used to be connected to the release device in the seat belt latch.

[0021] In this embodiment, a convex strip 11 is preferably provided between the normally open copper foil 3 and the common copper foil 4, and a convex strip 11 is also provided between the normally closed carbon film 5 and the common copper foil 4, and the convex strip 11 is provided perpendicular to the sliding direction of the slider 2. When the contact pin 601 of the reed 6 moves from the normally open copper foil 3 to the common copper foil 4, it is lifted by the convex strip 11, thereby preventing the contact pin 601 from contacting the common copper foil 4 and the normally open copper foil 3 at the same time. Through this improvement, the distance between the normally open copper foil 3 and the common copper foil 4 can be reduced, and similarly, the distance between the common copper foil 4 and the normally closed carbon film 5 can also be reduced, thereby improving the switching speed between the two circuits.

[0022] The cross section of the convex strip 11 is triangular, semicircular or arched, so as to facilitate the climbing of the contact foot 601.

[0023] The slider 2 is tubular and sleeved on the PCB board 1. The inner walls on both sides of the slider 2 are provided with slide grooves 12 corresponding to the two sides of the PCB board 1. The two sides of the PCB board 1 are respectively embedded in the corresponding slide grooves 12. The inner top surface of the slider 2 is opposite to the upper surface of the PCB board 1 with a gap. The spring 66 is fixedly connected to the inner top surface of the slider 2. In this way, the distance between the PCB board 1 and the spring 6 can be stabilized, ensuring that the two contact pins 601 of the spring 6 are reliably in contact with the normally open copper foil 3 and the common copper foil 4 or the common copper foil 4 and the normally closed carbon film 5.

[0024] The working process of the present invention is: firstly, the seat belt buckle fastening detection device of the present invention is installed into the seat belt latch. The installation method can refer to the invention patent with patent number "2007800228959" and "patent name is seat belt buckle fastening detection device and seat belt buckle". The normally closed carbon film 5 is set deep in the seat belt latch.

[0025] When the seat belt buckle is not inserted into the seat belt latch, Figure 2 and Figure 3 As shown, the reed 6 connects the normally open copper foil 3 and the common copper foil 4, the indicator light 7 and the power supply 8 are connected, and the indicator light 7 lights up to remind passengers to fasten their seat belts.

[0026] When the seat belt buckle is inserted into the seat belt latch to a certain depth, the reed 6 moves along the common copper foil 4 toward the normally closed carbon film 5 to Figure 4 In the state shown, the two contact pins 601 of the spring 6 are both overlapped on the convex strip 11, and the detection device has no output.

[0027] When the seat belt buckle is further inserted, the two contact pins 601 of the reed 6 are respectively in contact with the common copper foil 4 and the normally closed carbon film 5. Figure 5As shown, at this time, the power supply 8, the voltage-dividing resistor 9 and the normally closed carbon film 5 form a conductive loop, and the automobile central control chip 13 detects the voltage between the voltage-dividing resistor 9 and the normally closed carbon film 5. According to the power supply voltage and the resistance value of the voltage-dividing resistor, the resistance value of the normally closed carbon film 5 connected to the loop can be calculated, such as Figure 5 As shown, the deeper the seat belt buckle is inserted into the seat belt lock, the farther the slider 2 moves to the right, the greater the resistance of the normally closed carbon film 5 connected to the circuit. When the seat belt is subjected to tension, the seat belt buckle will be pulled, causing the seat belt buckle to move in the direction of withdrawal. Although the moving distance is very small, it will also cause the slider 2 to move to the left, causing the resistance of the normally closed carbon film 5 connected to the circuit to become smaller. The car's central control chip 13 will detect the voltage change. When the voltage changes very quickly, it means that the seat belt is pulled suddenly. At this time, there is a high probability that a safety accident will occur. The car's central control chip 13 will be able to respond in time, control the seat belt self-locking mechanism and the tightening mechanism to start, tighten the seat belt, and protect the safety of the passengers.

[0028] When the automobile central control chip 13 detects that the voltage changes slowly, it means that although the seat belt is pulled, it is not a sudden and strong pull, and has little impact on personal safety, so no response is required.

[0029] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A seat belt buckle fastening detection device, comprising a PCB board (1), characterized in that: It also comprises a slider (2) slidably sleeved on a PCB (1); a normally open copper foil (3), a common copper foil (4) and a normally closed carbon film (5) are arranged at equal intervals on the front side of the PCB (1) along the sliding direction of the slider (2); a reed (6) is connected to the slider (2); two contact pins (601) are arranged on the reed (6) and abut against the front side of the PCB (1); the two contact pins (601) are arranged along the sliding direction of the slider (2); the two contact pins (601) abut against the PCB (1) to form two contact points; the distance between the two contact points is smaller than the distance between the normally open copper foil (3) and the normally closed carbon film (5) and larger than the distance between the normally open copper foil (3) and the common copper foil (4); the normally open copper foil (3) and the common copper foil (4) are arranged at the same time. The common copper foil (4) is used to connect the vehicle-mounted indicator light (7) and the power supply (8) in series. When the two contact pins (601) of the reed (6) are respectively in contact with the normally open copper foil (3) and the common copper foil (4), the indicator light (7) is lit. The normally closed carbon film (5) and the common copper foil (4) are used to connect the voltage-dividing resistor (9) and the power supply (8) in series. When the two contact pins (601) of the reed (6) are respectively in contact with the normally closed carbon film (5) and the common copper foil (4), the vehicle central control chip (13) detects the voltage between the voltage-dividing resistor (9) and the normally closed carbon film (5), and then calculates the resistance value of the normally closed carbon film (5) connected to the circuit. The slider (2) is connected to a push handle (10), and the push handle (10) is used to connect to a release device in the seat belt latch.

2. The seat belt buckle fastening detection device according to claim 1, characterized in that: A convex strip (11) is provided between the normally open copper foil (3) and the common copper foil (4), and a convex strip (11) is also provided between the normally closed carbon film (5) and the common copper foil (4). The convex strip (11) is provided perpendicular to the sliding direction of the slider (2).

3. The seat belt buckle fastening detection device according to claim 2, characterized in that: The cross section of the convex strip (11) is triangular, semicircular or arched.

4. The seat belt buckle fastening detection device according to any one of claims 1 to 3, characterized in that: The slider (2) is tubular and sleeved on the PCB board (1). Slide grooves (12) corresponding to the two sides of the PCB board (1) are provided on the inner walls of the slider (2). The two sides of the PCB board (1) are respectively embedded in the corresponding slide grooves (12). The inner top surface of the slider (2) is opposite to the upper surface of the PCB board (1) with a gap therebetween. The spring sheet (6) is fixedly connected to the inner top surface of the slider (2).

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