JPS63240448A - Seat belt releasing device for vehicle - Google Patents

Abstract

PURPOSE:To eliminate any trouble of a lock releasing operation at the time of getting off a car by providing an unlocking means for releasing the locked relation between a tongue plate and a buckle which are supported by a seat belt, and operating the unlocking means when an ignition switch is turned off. CONSTITUTION:A tongue plate 2, which is attached to one of the belt end portions of a seat belt 1, and has an engaging hole 4 formed or the front end side thereof, is engaged with a buckle 3 so that the seat belt 1 is kept in the installed state, wherein the buckle 3 is constituted of a buckle body 5, a locking mechanism 6 and an unlocking mechanism 7 serving as an unlocking means. The locking mechanism 6 is provided with a hook member 10 capable of being engaged with the engaging hole 4 of the tongue plate 2, while the unlocking mechanism 7 is provided with a turning member 12 for releasing the engagement of the hook member 10 with the aid of the excitation of a solenoid 13. And, the solenoid 13 is controlled to excite when an ignition switch is turned off.

Description

[Detailed description of the invention] Ru.

(Prior art) Utility patent application No. 56-25511 is used for vehicle seat belt devices.
As shown in the publication, a tongue plate is attached to one end of the belt, a buckle into which the tongue plate is inserted is attached to the other end of the belt, a locking member is provided inside the buckle, and the locking member is attached to the buckle. There is one that is biased in the direction of locking against the tongue plate that is inserted inside.

In this case, when locking the seat belt, the tongue plate is inserted into the buckle and the tongue plate automatically locks with the locking member.
On the other hand, in order to unlock the tongue plate and the buckle, the tongue plate is released from the locking member by pushing the locking member back in the unlocking direction with respect to the tongue plate.

(Problem to be Solved by the Invention) However, in the above seat belt device, the locking relationship between the locking member and the tongue plate is maintained by the biasing force of the locking member, and in order to release the locking relationship, the locking member is attached to the tongue plate. However, when exiting the vehicle, the passenger must manually release the lock between the tongue plate and the buckle, which is a nuisance for the passenger. was.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to eliminate the troublesome operation of unlocking the seatbelt by the occupant when getting out of the vehicle.

(Means and operations for solving the problem) In order to achieve the above object, the present invention includes an unlocking means for releasing the locking relationship between the tongue plate supported by the seat belt and the buckle, and an ignition switch. and a control means for controlling the unlocking means to release the locking relationship between the tongue plate and the buckle when the ignition switch is in the OFF state. This is a vehicle seat belt release device characterized by the following configuration.

With the above configuration, when the ignition switch is in the OFF state, the locking relationship between the tongue plate and the buckle is automatically released.

Further, since the lock relationship between the tongue plate and the buckle is released by detecting when the ignition switch is in the OFF state, the vehicle is not being driven by the drive source when the lock relationship is released.

(Example) Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 to 5, l is a seat belt, and a tongue plate 2 is attached to one belt end of the seat belt l, and a buckle 3 is attached to the other belt end. There is.

As shown in FIG. 1, the tongue plate 2 has a flat plate shape, and an engagement hole 4 is formed at the tip end thereof.

The buckle 3 includes a buckle body 5, a lock mechanism 6,
The unlocking mechanism 7 is provided as an unlocking means.

The buckle body 5 has a locking mechanism 6 and an unlocking mechanism 7 built therein, and a tongue plate insertion opening 8 is formed in the buckle body 5 on the locking mechanism 6 side.

As shown in FIG. 2, the lock mechanism 6 includes a movable member 9,
It consists of a hook member lO. The movable member 9 is biased toward the opening 8 side by a spring 11, and when the tongue plate 2 is inserted into the buckle body 5 from the opening 8 by manual operation by a passenger.

The movable member 9 is attached to the buckle body 5 by the tongue plate 2.
It will be moved in a deep direction (to the right in Figure 2). The hook member 10 is rotatably supported by the buckle body 5 above the movement area of the movable member 9 in FIG.
a is urged to move toward the movement area of the movable member 9. The hook portion 10a of the hook member 10 corresponds to the engagement hole 4 of the tongue plate 2, and the tongue plate 2 moves the movable member 9 and the buckle body 5.
When inserted to a predetermined position within the tongue plate, the hook portion 10a of the hook member engages with the engagement hole 4 of the tongue plate 2. As a result, the hook member lO and the movable member l
The tongue plate 2 will be locked in cooperation with O.

The unlocking mechanism 7 includes a rotating piece 12, a solenoid 13, and a hook-shaped member 14. The rotating piece 12 is rotatably supported by the buckle body 5, and the rotating piece 12 is
When rotated clockwise in FIG. 2, it comes into contact with the hook member 10 and moves the hook portion 10a of the hook member 10 above the movement area of the movable member 9. The solenoid 13 includes a rod 13at- which can extend and retract toward the rotating piece 12, and the rod 13a extends when not energized and shortens when energized. The hook-shaped member 14 is attached to the tip of the rod 13a.
With the contraction of , it engages with the rotating piece 12 and applies a rotating force to the rotating piece 12 in the clockwise direction in FIG. 2 . As a result, the hook member 10 is
is rotated by the rotating piece 12 so that it is removed from the retaining hole 4 of the tongue plate 2.

The ignition switch includes a keyless switch 15 as a detection means. This keyless switch 15
When the key is inserted into the ignition switch, it conducts and outputs a high signal (hereinafter referred to as the H signal), and when the key is removed from the ignition switch, the continuity is broken and a low signal (hereinafter referred to as the L signal) is output. ) is output. When the key is removed from this ignition switch, the ignition switch is
The state becomes FF.

An output signal from the keyless switch 15 is input to a control unit 16 as a control means.

This control unit 16 has an input interface (hereinafter referred to as
It is composed of an input I/F) 17, a one-shot multivibrator 18, and a solenoid driver 19. The input I/F 17 is configured to input the output signal of the keyless switch 15, and the input I/F 17 has a function of shaping the waveform of the output signal of the keyless switch 15. The one-shot multivibrator 18 is configured to input the output signal of the input I/F 17 as an input signal, and when an L signal is input from the H signal state to the one-shot multivibrator 18, the one-shot multivibrator 18 18 has a function of outputting an H signal with a constant width. Solenoid driver 1
9 is designed to be input as an output signal of the one-shot multivibrator 18, and the H signal from the one-shot multivibrator 18 is input to the solenoid driver 19.
The solenoid driver 19 has a function of outputting a solenoid 13 drive signal (ON signal) when the signal is input to the solenoid 13 .

Therefore, in the seat belt release device described above, when the key is removed from the ignition switch while the tongue plate 2 is locked to the buckle 3, the keyless switch 15 outputs the L signal from the H@ state. The L signal is input to the one-shot multivibrator 18 via the input signal I/F 17. As a result, the one-shot multivibrator 18 outputs an H signal with a constant width, and this H signal with a constant width is input to the solenoid driver 19.

The solenoid driver 19 receives the H signal from the one-shot multivibrator 18 and outputs an ON signal of a certain width as shown in FIG. 4, and this ON signal energizes the solenoid 13 for a certain period of time. . By energizing this thread/id 13, the rod 13a of the solenoid 13
is shortened by a certain period of time, and the engagement relationship between the hook portion 10a of the hook member IO and the engagement hole 4 of the tongue plate 2 is released via the hook-shaped member 14 and the rotating piece 12.

When this engagement relationship is released, the tongue plate 2 is pushed out of the buckle 3 by the movable member 9 and the spring 11.

In this way, by removing the key from the ignition switch, the locking relationship between the tongue plate 2 and the buckle 3 is automatically released, and the occupant does not have to manually release the seatbelt lock when exiting the vehicle. It disappears.

2. At this time, the key is removed from the ignition switch and the ignition switch is in the OFF state, so the vehicle is not being driven. Therefore, in order to ensure the safety of the occupants, The locking relationship between the tongue plate 2 and the buckle 3 is released.

FIG. 5 shows another embodiment. In this embodiment, the same components as those in the previous embodiment are given the same reference numerals, and the explanation thereof will be omitted.

In this embodiment, an ignition switch 20 and a vehicle speed sensor 21 are used as detection means.

The ignition switch 20 outputs an L signal when turned OFF by the key, and outputs an H signal when the ignition switch 20 is turned OFF with the key inserted. The signal is input to the control unit 16 as a detection signal.

The vehicle speed sensor 21 detects the vehicle speed and outputs a vehicle speed pulse corresponding to the detected vehicle speed, and this vehicle speed pulse is also input to the control 22) 16.

The control unit 16 includes an inverter 22, a one-shot multivibrator 18, an input interface (hereinafter referred to as input I/F) 23, a frequency-voltage converter (hereinafter referred to as F/V converter) 24, and... , a comparator 25, a timer circuit 26, an AND circuit 27, and a solenoid driver 19.

The inverter 22 is configured to input the signal of the ignition switch 20 as an input signal, and has a function of inverting the output signal of the ignition switch 20, and outputs an H signal when an L signal is input. It is supposed to be done.

One-shot multivibrator 18 is inverter 22
The one-shot multivibrator 18 has a function of outputting an H signal of a constant width when an H signal is input from an L signal state.

The input I/F receives a vehicle speed pulse from the vehicle speed sensor 21 as an input signal, and the input I/F 2
3 has a function of shaping the waveform of the input vehicle speed pulse and outputting the waveform-shaped signal as an output signal.

The F/V converter 24 receives the output signal of the input I/F 23 as an input signal, and the F/V converter 2
4 has a function of converting the input pulse frequency into a voltage and outputting the voltage signal as an output signal.

The comparator 25 receives the output signal of the F/V converter 24 as an input signal, and the comparison! The vessel 25 is
It has a function of comparing the input voltage with a reference voltage (vehicle speed = 0) and outputting a timer circuit activation signal when the input voltage reaches the reference voltage.

The timer circuit 26 can receive the timer circuit start signal of the comparator 25 as an input signal, and when the timer circuit start signal is input to the timer circuit 26, the timer circuit 26 outputs an H signal for a predetermined period of time. It has a function to output. In this embodiment, the timer circuit 26 outputs an H signal for 10 seconds after receiving the timer circuit activation signal from the comparator 25.

The AND circuit 27 is configured to input the output signal of the timer circuit 26 and the output signal of the one-shot multivibrator 18, and the AND circuit 27 receives an H signal only when both human power signals are H signals. It has a function to output.

The solenoid driver 19 has the same function as in the above embodiment, and when the H signal is input, the solenoid driver 19 outputs the solenoid 13 drive signal (ON signal).
It is designed to output .

Therefore, in the seat belt release device, when the vehicle stops, based on the detection signal of the vehicle speed sensor 21,
Comparator 25 determines that the vehicle speed is 0 and outputs a timer circuit activation signal. As a result, the timer circuit 26 outputs an H signal for a predetermined period of time, and the H signal is input to the AND circuit 27.

At this time, if the ignition switch 20 is turned off by the key while the timer circuit 26 is outputting the H signal, the ignition switch 20 will output the L signal.

The L signal is turned into an H signal by the inverter 22. The H signal of the inverter 22 is input to the one-shot multi-vibrator 18, and the one-shot multi-vibrator 18 outputs an H signal of a constant width by changing the input state from the L signal state to the H signal state. become. This H signal is input to the AND circuit 27, and the AND circuit 27 outputs the H signal while the output signal from the timer circuit 26 and the output signal from the one-shot multivibrator are both H signals. This H signal will be input to the solenoid driver 19, and while the solenoid driver 19 is inputting the H signal,
Outputs the solenoid 13 drive signal (ON signal). As a result, the solenoid 13 is energized while the ON signal is output from the solenoid driver 19, and as in the previous embodiment, the hook portion 10a of the hook member 10 and the engagement hole 4 of the tongue plate 2 are connected. The engagement relationship is rod 1
It will be canceled due to the shortening of 3a.

When the vehicle is running, the comparator 25 determines its state 7 and does not output the timer circuit activation signal. Therefore, the timer circuit 26 outputs an L signal, and the AND circuit 27 No matter what kind of output signal is output from the one-shot multivibrator 18,
It will output an L signal. As a result, the solenoid driver 19 cannot output an ON signal, and the solenoid 13 is not energized.
The rod 13a is maintained in an extended state, and the engagement relationship between the hook portion 10a of the hook member 10 and the engagement hole 4 of the tongue plate 2 is not released.

When the ignition switch 20 is turned to a state other than OFF with the key inserted into the ignition switch 20, the ignition switch 20 outputs an H signal, and the inverter 22 converts the H signal into an L signal. invert it.

The L signal will be input to the one-shot multivibrator 18, but in the L@ signal, the one-shot multivibrator 18 will not output an H signal but an L signal. Therefore, the AND circuit 27 will output a signal no matter what output signal is output from the timer circuit 26, and the solenoid driver 19 cannot output an ON signal. As a result, the solenoid 13 is not energized. The hook portion 10 of the hook member IO is not
The engagement relationship between a and the engagement hole 4 of the tongue plate 2 is maintained.

In this way, the seat belt release device locks the tongue plate 2 and buckle 3 only when the ignition switch 20 is turned off within a certain period of time after the vehicle speed reaches 0. The relationship is canceled.As a result, in this embodiment, the same effect as in the previous embodiment is produced.

(Effects of the Invention) As described above, the present invention automatically releases the locking relationship between the tongue plate and the buckle when the ignition switch is in the OFF state. The troublesome operation of unlocking the seatbelt can be eliminated.

Furthermore, since the two vehicles are being driven by the drive source when the locking relationship with the tongue plate body is released, the locking relationship can be released while ensuring the safety of the occupants.

[Brief explanation of drawings]

@Figure 1 is an explanatory diagram showing the seat belt, and Figure 2 is a sectional view showing the buckle. FIG. 3 is a block diagram showing the control of the seatbelt release device according to the present invention, FIG. 4 is a diagram showing the output signal states of the keyless switch and the solenoid driver, and FIG. 5 is the seatbelt release device according to another embodiment. It is a block diagram showing control of. l: Seat belt 2: Tongue plate 3: Buckle 7: Unlock mechanism 16 2 control unit

Claims (1)

[Claims] (1) An unlocking means for releasing the locking relationship between the tongue plate supported by the seat belt and the buckle; a detection means for detecting the OFF state of the ignition switch; A seatbelt release device for a vehicle, comprising: a control means for controlling the unlocking means so as to release the locking relationship between the seatbelt release device and the unlocking means.