KR20210028927A - Seatbelt release device - Google Patents

Abstract

Disclosed is an invention for a seat belt release device that automatically releases a seat belt by detecting an impact signal. According to the present invention, the seat belt release device comprises: a seat belt case mounted on a vehicle seat; a buckle unit coupled to the seat belt case; a belt unit mounted inside a vehicle; a tongue unit coupled to the belt unit, adjustable in length, and detachably coupled to the buckle unit; a release button unit installed on the buckle unit and releasing the coupling of the tongue unit and the buckle unit; an impact sensor for detecting the impact of the vehicle; and a control unit for operating the release button unit so that the coupling of the tongue unit and the buckle unit is released when an impact signal is transmitted from the impact sensor.

Description

Seat belt release device {SEATBELT RELEASE DEVICE}

The present invention relates to a seat belt unwinding device of a vehicle, and more particularly, to a seat belt unwinding device that is automatically released when a specific shock abnormality is detected on the vehicle.

In general, a seat belt installed in a vehicle is worn to fix the upper body of the occupant to the seat during operation, and the occupant prevents the occupant from being bounced in the direction of the vehicle by inertia in the event of a collision by wearing the seat belt. It is a device for your safety.

However, when a vehicle crash accident occurs, the occupant is injured or lost consciousness, and the occupant is in a situation where it is difficult to unfasten the seat belt by himself, and a secondary safety accident may occur.

The present invention has been created to improve the above problems, and an object of the present invention is to provide a seat belt loosening device in which the seat belt is automatically released by detecting an impact signal when an impact due to a collision or the like occurs in a vehicle.

A seat belt release device according to the present invention includes: a seat belt case mounted on a vehicle seat; a buckle portion coupled to the seat belt case; A belt unit mounted inside the vehicle; A tongue portion coupled to the belt portion, adjustable length, and detachably coupled to the buckle portion; A release button portion installed on the buckle portion and releasing the coupling portion of the tongue portion and the buckle portion; An impact sensor for detecting the impact of the vehicle; And a control unit for operating the release button unit so that the coupling of the tongue unit and the buckle unit is released when an impact signal is transmitted from the impact sensor.

In the present invention, the control unit releases the release button unit through the driving unit.

In the present invention, the drive unit, a motor; A rotating shaft rotated by the power provided by the motor; And a wire; is connected to the rotation shaft to be wound when the rotation shaft rotates.

In the present invention, the control unit comprises: a main board receiving an impact signal from the impact sensor; A relay switch connected to the main board and receiving an operation signal from the main board; And a buzzer connected to the main board and receiving an operation signal from the main board to generate an alarm sound when an impact occurs.

In the present invention, the relay switch receives an operation signal from the main board and, after a set time, inputs an operation signal to the driving unit.

In the present invention, the impact sensor detects an impact applied to the vehicle or an airbag operation signal of the vehicle.

According to the present invention, the seat belt unwinding device is in a situation where it is difficult for the occupant to unfasten the seat belt by himself due to the occurrence of injuries or loss of consciousness in the event of a vehicle collision, and a secondary safety accident may occur. , The seat belt is automatically released from the occupant, which can help the occupant to escape safely.

Further, according to the present invention, the seat belt release device is not released immediately when a collision accident is detected. The relay switch of the seat belt release device receives an impact detection signal and sets the seat belt release device to operate after a set time. Therefore, the seat belt is released after allowing the seat belt to absorb the impact during a vehicle collision accident, thereby preventing a secondary safety accident and helping the occupant to escape safely.

1 is a perspective view showing a seat belt loosening device according to an embodiment of the present invention.
2 is a side view showing a seat belt loosening device according to an embodiment of the present invention.
3 is a perspective view showing a buckle according to an embodiment of the present invention.
4 is a cross-sectional view showing a buckle according to an embodiment of the present invention.
5 is a front view showing the interior of a control unit according to an embodiment of the present invention.
6 is a perspective view showing a driving unit according to an embodiment of the present invention.
7 is an operation flow chart showing the operation sequence of the seat belt loosening device according to an embodiment of the present invention.

Hereinafter, an embodiment of a seat belt loosening device according to the present invention will be described with reference to the accompanying drawings. In the process of describing the seat belt loosening device, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

1 is a perspective view showing a seat belt loosening device according to an embodiment of the present invention, Figure 2 is a side view showing a seat belt loosening device according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention A perspective view showing a buckle part according to an example, FIG. 4 is a cross-sectional view showing a buckle part according to an embodiment of the present invention, and FIG. 5 is a front view showing the inside of a control unit according to an embodiment of the present invention, and FIG. 6 Is a perspective view showing a driving unit according to an embodiment of the present invention. 7 is an operation flow chart showing the operation sequence of the seat belt loosening device according to an embodiment of the present invention.

1 and 2, the seat belt release device 1 according to an embodiment of the present invention includes a buckle unit 3, an impact sensor 10, a control unit 20, and a driving unit 30. .

The seat belt case 2 is mounted on the lower side of the vehicle seat. The upper part of the seat belt case 2 is coupled with a buckle part 3 which is combined with the tongue part 4 of the belt part 5. The seat belt case (2) and the buckle part (3) are installed in the lower side of the vehicle seat, so that the tongue part (4) of the belt part (5) and the buckle of the seat belt case (2) are mounted on the side frame inside the vehicle. Part 3 can be combined.

The seat belt case (2) protects the wire (34). When the wire 34 is not protected by the seat belt case 2 and is exposed to the outside, the wire 34 may be twisted, or the wire 34 may be damaged due to contact or interference with the outside. Therefore, by protecting the wire 34 with the seat belt case 2, damage and twisting of the wire 34 can be prevented.

The seat belt case 2 protects the control unit 20. The control unit 20 includes a main board 21 receiving an impact detection signal, a buzzer 22 receiving an operation signal from the main board 21, and a relay switch 23 receiving an operation signal from the main board 21. Includes. Since the control unit 20 includes parts that control the operation of the seat belt unwinding device 1, the control unit 20 can be protected by the seat belt case 2.

The shock sensor 10 is installed in connection with the main board 21 installed in the control unit 20 of the seat belt unwinding device 1. The shock sensor 10 may detect signals such as shock, tilt, vibration, and airbag operation of the vehicle. The impact detection sensor 10 is installed under the seat of the vehicle to detect an impact applied to the vehicle seat in case of an accident such as a vehicle collision. In addition, the shock sensor 10 may be installed with a sensor that is connected to an operation unit of an airbag of a vehicle to receive an airbag operation signal. If the impact detection sensor 10 reacts sensitively to a weak impact, the seat belt release device 1 can be operated even when it is not a vehicle crash, so the sensitivity of the crash detection sensor 10 is adjusted to cause a vehicle collision. Make sure it works only when there is a big impact, such as an accident.

3 and 4, the buckle part 3 is coupled with the tongue part 4 of the belt part 5. To release the tongue part 4 of the belt part 5 from the buckle part 3, the release button part 6 of the buckle part 3 is pressed, and the tongue part 4 of the belt part 5 is pressed into the buckle part 3 ) Can be activated.

The buckle part 3 includes a release button part 6, a release button part knob 7, a spring 8, and the like therein. A spring 8 is installed inside the release button knob 7. The buckle portion 3 includes a hook fastener (not shown) that engages with the tongue portion hole 9 of the tongue portion 4 formed in the tongue portion 4 of the belt portion 5. The hook fastener (not shown) is installed inside the spring 8.

The tongue part 4 of the belt part 5 is inserted into the buckle part 3.

The tongue part 4 of the belt part 5 and the hook fastening hole (not shown) are combined with the tongue part 4 inserted into the buckle part 3, and the hook fastening hole (not shown) is the tongue part of the belt part 5 It is made by engaging with the tongue hole 9 formed in (4). When the spring 8 is compressed in the pressing direction of the release button 6, the spring 8 has a restoring force in the opposite direction to the pressing direction.

A knob 7 is formed at the lower end of the release button part 6, and the rotation shaft 33 of the release button part knob 7 and the driving part 30 is connected by a wire 34. When the wire 34 connected to the release button part knob 7 rotates the rotation shaft 33 of the driving part 30 by the operation of the driving part 30, it is wound and pulled toward the driving part 30. Accordingly, the release button part knob 7 is pulled in the pressing direction of the release button part 6. When the release button knob 7 is pulled in the pressing direction of the release button 6, the hook fastener (not shown) is pulled so that the hook fastener (not shown) is separated from the tongue hole 9. Accordingly, the coupling between the buckle portion 3 and the tongue portion 4 of the belt portion 5 is released.

Referring to FIG. 5, the inside of the control unit 20 includes a main board 21 receiving a signal from the shock sensor 10 and a buzzer 22 receiving an operation signal from the main board 21 and generating an alarm sound. , A relay switch 23 is installed that receives an operation signal from the main board 21 and transmits the operation signal to the driving unit 30 after a set time.

The main board 21 serves as a hub connecting the shock sensor 10 and the buzzer 22 and the relay switch 23. When shock signals such as shock, slope, vibration, airbag operation, etc. are transmitted from the shock sensor 10 to the main board 21, an operation signal is transmitted to the buzzer 21 or the relay switch 23.

An algorithm for determining whether a vehicle collision has occurred is programmed and input to the main board 21. The algorithm is programmed so that the main board 21 inputs an operation signal to the buzzer 22 and the relay switch 23 only when the vehicle's impact value measured by the impact sensor 10 is greater than or equal to the set value. In addition, the relay switch 23 is programmed to transmit an operation signal to the driving unit 30 after a set time. In addition, the buzzer 22 is operated by receiving a vehicle collision signal from the main board 21 of the gearbox 20, and generates an alarm sound to notify the occupant and the vehicle of a vehicle collision accident. By generating an alarm sound in a situation where there is no situation, such as when the occupant loses his mind, there is an effect of alerting the occupant so that the occupant can escape from the accident vehicle.

The relay switch 23 divides the circuit into two in the electric circuit, creates a signal from one side, and controls the operation of the other circuit according to the signal. When it is necessary to open or close an electric circuit, a relay switch 23 can be installed to control the operation of the circuit.

The relay switch 23 receives an operation signal from the main board 21 of the control unit 20 and transmits the operation signal to the driving unit 30 after a set time.

The relay switch 23 receives an operation signal from the main board 21 in which the algorithm is programmed and operates after a set time input to the main board 21. Accordingly, after the vehicle crash, the relay switch 23 does not immediately transmit an operation signal to the driving unit 30. Accordingly, the driving unit 30 is not operated and the seat belt loosening device 1 is operated after the set time of the main board 21. When the seat belt loosening device 1 is operated immediately, the time for absorbing the shock applied to the vehicle occupant by the belt unit 5 becomes insufficient. Thus, the probability of injuries to vehicle occupants is increased. However, the seat belt unwinding device 1 of the present invention is helpful for the safety of the vehicle occupant because it is released after the belt part 5 absorbs the impact applied to the body of the vehicle occupant for a set time. The belt part 5 should be made of a material having high elasticity.

The relay switch 23 connected to the main board 21 of the control unit 20 transmits an operation signal to the driving unit 30 after a set time.

Referring to FIG. 6, the driving unit 30 is composed of a motor 31, a main shaft 32 of the motor, and a rotation shaft 33 of the motor. The main shaft 32 of the drive unit 30 has a toothed gear, and this toothed gear is referred to as a worm wheel. The motor 31 includes a rotating shaft 33 that is operated by orthogonally coupled to the main shaft 32 of the motor. The rotation shaft 33 of the drive unit 30 has a worm, which is a tooth that meshes with a worm wheel. Accordingly, the worm wheel of the motor main shaft 32 and the worm of the rotating shaft 33 are engaged and operated, so that the power of the motor main shaft 32 is orthogonally coupled to the motor main shaft 32. It is transmitted to the rotation shaft 33 can be operated.

One side of the wire 34 is connected to the rotation shaft 33 of the driving unit 30, and the other side of the wire 34 is connected to the knob 7 of the release button part. When an operation signal is input from the relay switch 23 to the driving unit 30, the main shaft 32 of the motor 31 rotates. The power of the motor main shaft 32 is transmitted to the rotation shaft 33 orthogonally coupled with the motor main shaft 32. As the rotation shaft 32 rotates, the wire 34 connected to the rotation shaft 33 is wound and pulled toward the driving unit 30. As the wire 34 is wound toward the driving unit 30, the release button 6 of the buckle unit 3 is operated in a pressing direction. Accordingly, the tongue portion 4 of the belt portion 5 is disengaged from the buckle portion 3.

Referring to FIG. 7, it is an operation flow chart showing an operation sequence of the seat belt loosening device 1. First, a shock or an airbag operation signal to the vehicle is sensed or transmitted to the shock sensor 10 of the seat belt loosening device 1 (S110). The impact detection sensor 10 transmits an impact signal to the main board 21 of the control unit 20 (S120). When the impact detection sensor 10 detects an impact greater than or equal to the set value, the buzzer 22 and the relay switch 23 are programmed in the main board 21 to transmit an operation signal. When the impact detection sensor 10 detects an impact less than the set value, it does not transmit an operation signal to the main board 21 (S210). When an impact signal equal to or greater than the set value of the impact sensor 10 is transmitted to the main board 21 (S130), the main board 21 inputs an operation signal to the buzzer 22 (S140). The buzzer 22 immediately generates an alarm sound to inform the occupants and surroundings of the vehicle collision situation (S150). In addition, the main board 21 inputs an operation signal to the relay switch 23 (S140). In the main board 21, an algorithm is programmed so that the relay switch 23 is operated after a set time has elapsed (S160). The relay switch 23 receives an operation signal from the main board 21 in which the algorithm is programmed, and inputs the operation signal to the driving unit after the set time input to the main board 21 has elapsed (S170). The relay switch 23 does not immediately transmit an operation signal to the driving unit 30 before the set time has elapsed (S220).

The relay switch 23 connected to the main board 21 of the control unit 20 transmits an operation signal to the driving unit 30 after the set time has elapsed (S170). One side of the wire 34 is connected to the rotation shaft 33 of the driving unit 30, and the other side of the wire 34 is connected to the release button knob 7. When the operation signal of the relay switch 23 is input to the driving unit 30, the motor 31 of the driving unit 30 is operated (S180) and the rotating shaft 33 is wound to wind the wire 34 toward the driving unit 30. (S190). Therefore, the release button part knob 7 is pulled in the pressing direction of the release button part 6, and the coupling of the buckle part 3 and the tongue part 4 is released, so that the release operation of the seat belt release device 1 It is completed (S200).

By operating the seat belt release device (1), in the event of a vehicle accident such as a collision, the vehicle occupant can listen to the alarm sound of the buzzer 22 and wake up, and the vehicle occupant is injured or unwinds the seat belt because there is no situation. In difficult situations, it can help vehicle occupants safely escape from the accident vehicle.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand.

Therefore, the true technical protection scope of the present invention should be determined by the claims.

1: Seat belt release device 2: Seat belt case
3: Buckle part 4: Tongue part
5: Belt part 6: Release button part
7: release button knob 8: spring
9: tongue hole 10: shock sensor
20: control unit 21: main board
22: buzzer 23: relay switch
30: drive unit 31: motor
32: motor main shaft 33: rotating shaft
34: wire

Claims (7)

A seat belt case mounted on a vehicle seat;
A buckle part coupled to the seat belt case;
A belt unit mounted inside the vehicle;
A tongue portion coupled to the belt portion, adjustable in length, and detachably coupled to the buckle portion;
A release button part installed on the buckle part and releasing the coupling of the tongue part and the buckle part;
An impact sensor for detecting the impact of the vehicle; And
And a control unit operating the release button unit to release the coupling of the tongue unit and the buckle unit when an impact signal is transmitted from the impact sensor.
The method of claim 1,
Wherein the control unit releases the release button unit through the driving unit.
The method of claim 2,
The driving unit,
motor;
A rotating shaft rotated by the power provided by the motor; And
And a wire connected to the rotation shaft and wound when the rotation shaft rotates so that the release button portion is pressed.
The method of claim 2,
The control unit,
A main board receiving an impact signal from the impact sensor;
A relay switch connected to the main board and receiving an operation signal from the main board; And
And a buzzer connected to the main board and receiving an operation signal from the main board to generate an alarm sound when an impact occurs.
The method of claim 4,
The relay switch receives an operation signal from the main board and, after a set time, inputs an operation signal to the driving unit.
The method of claim 5,
The relay switch receives an operation signal from the main board and, after a set time, inputs an operation signal to the driving unit.
The method of claim 1,
The shock sensor is a seat belt release device, characterized in that for detecting an impact applied to the vehicle or an airbag operation signal of the vehicle.

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