JPH02106456A - Seat belt device - Google Patents

Abstract

PURPOSE:To permit a driver to be surely restrained by installing a pretension mechanism for releasing and then restraining the pulling-out and taking-up of a webbing through the switching of a switch or the sensing of an impact, and a webbing folding mechanism. CONSTITUTION:In the mounting of a webbing 2, if a driver senses an oppressive feeling and switches a reset switch to ON side, the solenoid 4e of a pretension mechanism 4 is energized for a prescribed time by a timer circuit. Then, a brake arm 4b turns in the counterclockwise direction and is separated from the webbing 2, and press-contacts the webbing 2 again, and restrains said webbing 2. In other words, the webbing 2 is pulled out much more than a prescribed pulled-out quantity. If in this state, a large impact is applied, the solenoid 8c of a webbing folding mechanism 8 is energized, and the webbing 2 is folded through a roller 8h by the turn by the spring 8e of a turning arm 8.

Description

[Detailed description of the invention] [Purpose of the invention]

(Industrial Application Field) The present invention relates to a seat belt device used to restrain an occupant to a seat using webbing. (Prior art) Conventionally, the above-mentioned seatbelt device was developed in the Showa 5
Published on May 31, 2008 New Edition Automotive Engineering Toilet Tank Volume 7
Equipment There is one disclosed in Section 15, Section 3, and FIG. 4 shows a schematic diagram of the seat belt device described in the above-mentioned document. That is, the seat belt device shown in Fig. 1 is a three-point seat belt device, and is provided with a retracting mechanism 100 fixed to the lower part of the center pillar (vehicle body side) B1 on the outer side of the seat S. One end of the webbing 101 is attached to the winding mechanism 100 so as to be windable, and the other end of the webbing 101 pulled out from the winding mechanism 100 is attached to a relay anchor fixed to the upper part of the center pillar Bm on the outer side of the sheet S. An insertion tongue T supported by A1 and slidably inserted through the webbing 101 is attached to an anchor A2 fixed to the floor (vehicle body side) on the inner side of the seat S. Further, on the center side of the seat S, a buckle B for mounting and releasing the insertion tongue T is attached to the floor B2. This winding mechanism 100 automatically winds up the webbing 101 when the webbing 101 is brought into a free state after being pulled out.
When a large impact or the like is detected, the pulling out and winding of the webbing 101 is stopped, and the webbing 101 is locked at the amount of pulling out (for example, ELR). Here, the winding force with which the first winding mechanism 100 automatically winds up the webbing 101 is set to be so small that the occupant does not feel pressure when hanging the webbing 101. Therefore, after the crew member sat on the seat, webbing 101
The passenger is restrained to the seat S by pulling out the belt from the winding mechanism 100, hanging it diagonally from the shoulder to the chest of the passenger, holding the waist, and attaching the insertion tongue T to the buckle B. For example, when a large impact occurs, the winding mechanism 100 stops pulling out and winding up the webbing 101 to keep the occupant restrained in the seat (S). (Problem to be Solved by the Invention) However, in the conventional seat belt device described above, the force for winding up the webbing 101 by the single winding mechanism 100 is small so that the occupant does not feel pressured. When the occupant moves while sitting in the S, the webbing 101 also moves in the winding mechanism 1 in response to the movement of the occupant.
It is set to be drawn from 00. For example, when the winding mechanism 100 stops pulling out and winding up the webbing 101 due to an impact or the like while the webbing 101 has been pulled out more than the pulling amount that restrains the occupant to the sea seat S, Since the webbing 101 is pulled out more than the predetermined amount and remains loose, there is a problem that the occupant cannot be restrained to the seat S. There is a problem in that it is desired to be able to restrain the occupant in the seat S when such a situation occurs. (Purpose of the Invention) This invention was developed in view of the above-mentioned conventional problems, and even if the webbing is pulled out more than a predetermined amount, it is not possible to reliably restrain the occupant in the seat in the event of an impact. The purpose of this invention is to provide a seatbelt device that is capable of high performance, and its structure is highly ingenious.

[Structure of the invention]

(Means for Solving the Problems) A seat belt device according to the present invention is provided. In a seatbelt device including a webbing that is attached at one end to a retracting mechanism so as to be retractable and at the other end is pulled out from the retracting mechanism and attached to the vehicle body, the webbing is pulled out near the retracting mechanism. A webbing detection means for detecting the amount of the webbing is provided, and a pretension mechanism is provided for stopping the pulling out and winding of the webbing after being released for a predetermined amount of time by switching a switch or sensing an impact. Webbing folding that is activated by sensing an impact and folds the webbing in its length direction while detecting that the webbing has been pulled out by more than a predetermined amount, thereby making it the same as if the webbing was pulled out by a smaller amount. It is characterized by a structure in which a mechanism is provided, and the structure of such a seat belt device is used as a means for solving the above-mentioned conventional problems. (Function) According to the seat belt device according to the present invention, the negative end side is attached to the winding mechanism so as to be able to be wound up, and the other end side is pulled out from the winding mechanism and attached to the vehicle body side, and the A pretension mechanism provided near the take-up mechanism releases the webbing and take-up for a predetermined time by switching a switch or sensing an impact, and then stops the webbing, and the webbing detecting means stops the webbing from being pulled out by more than a predetermined amount. While detecting that the webbing is being pulled out, the webbing folding mechanism is actuated by sensing the impact and folds the webbing in its length direction, so the webbing is stopped as being in the same state as if the webbing was pulled out by a reduced amount. Therefore, even if the webbing is pulled out more than a predetermined amount, when an impact or the like occurs, the actual amount of webbing pulled out is adjusted to such an extent that the occupant is restrained by the seat. (Example) Hereinafter, a first example of the seat belt device according to the present invention will be described.
This will be explained based on the drawings to FIG. That is, in the seat belt device shown in FIG.
is an emergency locking winding mechanism, 2 is a webbing, 3 is a webbing detection means, 4 is a pretension mechanism, 5, 6 and 7 (see Figure 4) are a door detection switch, a reset switch, and an impact sensor. switch, code 8
is a webbing folding mechanism. As shown in FIG. 1, the winding mechanism 1 is equipped with a reel 1a that winds the webbing 2 with a predetermined winding force. The webbing 2 is pulled out against force. In addition, this winding mechanism 1 is fixed near the lower end of a vertically elongated frame 9 in FIG. It is supposed to be done. The winding mechanism 1 is equipped with an impact sensing means (not shown) that locks the reel 1a to stop pulling out and winding the webbing 2 when a large impact is detected. One end of the webbing 2 is attached to the winding mechanism 1 so that the webbing 2 can be wound up, and the other end (not shown) is attached to the center pillar B! on the outer side of the sheet S in the same way as shown in FIG. Relay anchor A1 fixed to the top of
The insertion tongue T supported by and slidably inserted is attached to the anchor B2 fixed to the floor B2 on the inner side of the seat S. The webbing detection means 3 is a well-known reed switch, and includes a detection section (magnet 3a) attached to a predetermined position of the webbing 2.
) is provided with a switching section 3bl (19) that turns on and off when the two are separated from each other by φ, and an external connection connector 3C for outputting the output signal of this switching section 3b to the outside. The means 3 is fixed near the upper end of a vertically elongated base 9 in FIG.
It is configured to detect that the webbing 2 has been pulled out by more than a predetermined amount from the winding mechanism 1, and output a detection signal to the outside via the external connection connector 3C. On the other hand, the pretension mechanism 4 is actuated by switching a door detection switch 5 or a reset switch 6, which will be described later, and by sensing a large impact by an impact detection switch 7, and stops pulling out and winding the webbing 2 after releasing it for a predetermined period of time. It is something to do. This pretension mechanism 4 includes a braking member (rubber sheet) 4a fixed to the frame 9 and slidingly contacting the webbing 2 on the right side in FIG. A braking arm 4b that presses against and separates from the left side in FIG. 1, and this braking arm 4b.
an electromagnetic solenoid 4e operated via a wire 4d;
The electromagnetic lens 4e is provided with an external connection connector 4f for supplying a predetermined power source. Here, the brake arm 4b is rotatably supported by a pivot shaft 4g fixed to the frame 9, and a return spring 4h elastically deformed to the contraction side is provided between the brake arm 4b and the pivot shaft 4g. The return spring 4h urges the brake arm 4b clockwise in FIG. 1 around the brake member 4a, that is, the pivot shaft 4g. The brake arm 4b also has a wire connecting portion 4 i I on which the wire 4 d is hooked on the left side in FIG.
@I'm getting it. Then, from the external connection connector 4f to the electromagnetic solenoid 4
When the electromagnetic solenoid 4e is excited by supplying a predetermined power to e, it attracts the wire 4d, so the braking arm 4b moves counterclockwise in FIG. 1 about the pivot shaft 4g against the return spring 4h. When the electromagnetic solenoid 4e is demagnetized, the wire 4d is returned, and the brake arm 4b is energized by the return spring 4h and is pressed against the webbing 2. Then, the webbing 2 is stopped by the braking member 4a. Furthermore, as shown in FIG. 3, the pretension mechanism 4 is provided with a time limit circuit 4j that generates an output signal for a predetermined period of time in response to an input signal and then stops generating the output signal. The door detection switch 5 is installed near the driver's side door of the vehicle (not shown), and when the door is closed, the switch is turned off, and when the door is open, the switch is turned off. The switch is turned on. The reset switch 6 is installed in a vehicle (not shown), for example, in a driver's seat, where it can be easily reached by a passenger, and by switching the reset switch 6, the switch is turned on and turned off. The impact detection switch 7 is attached to the exterior side of the vehicle body, such as a front bumper or a rear bumper (not shown), and is turned on when these bumpers receive a large impact. On the other hand, the webbing folding mechanism 8 operates upon sensing an impact while the webbing detection means 3 detects that the webbing 2 has been pulled out by more than a predetermined amount, and folds the webbing 2 in the longitudinal direction. This is the same as if the amount of the webbing 2 to be pulled out was reduced. This webbing folding mechanism 8 includes a rotatable arm 8a rotatably provided on a base 9, a hook 8b that locks and unlocks the rotary arm 8a, and an electromagnetic solenoid 8C that operates the hook 8b. ing. The rotating arm 8a has a base 9 on the lower side in FIG.
The return spring 8e is rotatably attached to a support shaft 8d fixed to the support shaft 8d, and the other end of a return spring 8e with one end attached to the support shaft 8d is hooked. The webbing 2 is energized and is attached to the support shaft 8d.
The roller 8f that hangs is rotatably attached. Further, a roller 8h is attached to the first rotating arm 8a, which is spaced apart from the roller 8f on the upper side in FIG. 1 and rotatably hangs the webbing 2 on the lock pin 8g. A locking piece 81 is provided which fits and locks the rotating arm 8a into a notch 9a provided in the base 9 when the rotating arm 8a rotates counterclockwise in FIG. As shown in FIG. 2, the hook 8b is rotatably attached to a support shaft 8j fixed to the base 9, and the other end is hooked to the return spring 8, which has one end attached to the support shaft 8j. The roller 8m, which is biased counterclockwise in FIG. 1 and which hangs the webbing 2 on the support shaft 8j, is rotatably mounted. The hook 8b is also provided with an opening 8P on the left side in FIG. 1 to which a rod 8n connected to an electromagnetic solenoid 8C, which will be described later, is attached. The electromagnetic solenoid 8c is configured such that the webbing detection means 3
While detecting that the webbing 2 has been pulled out more than a predetermined amount, the impact detection switch 8 shown in FIG.
When solenoid q senses an impact, the impact sensing switch 8q is turned on to supply a predetermined power and excite the electromagnetic solenoid 8c. The electromagnetic solenoid 8C is provided with a rod 8n that operates in a direction, and an external connection connector 8r that supplies a predetermined power to the electromagnetic solenoid 8C. Then, the rod 8n is inserted into the opening 8P provided in the hook 8b.
When the electromagnetic solenoid 8C is energized and deenergized, the hook 8b is rotated clockwise and counterclockwise in FIG. 1. Here, as shown in FIG. 1, the other end of the webbing 2 pulled out from the winding mechanism 1 is folded into a webbing folding mechanism 8.
It is applied to one roller 8f attached to the rotating arm 8a, and then it is applied to the other roller 8h attached to the rotating arm 8a by crossing it from the roller 8f.
Roller 8m attached to hook 8b with a swivel
It's a hanger. Further, after passing between the braking member 4 of the pretension mechanism 4 and the braking arm 4b, the webbing detection means 3 is attached to the vehicle body in the same manner as shown in FIG. Further, the hook 8b of the webbing folding mechanism 8 is hooked to the lock pin 8g of the rotating arm 8a, so that the rotating arm 8a is in a locked state at the non-operating position shown in FIG. That is, the winding force [F+] for the winding mechanism 1 to wind the webbing 1, the force [F2] for the pretension mechanism 3 to restrain the webbing 1, and the force for winding the webbing 2 from the webbing folding mechanism 8. The relationship between [F3] and [FI] < [F2] < [F3]. Furthermore, as shown in FIG. 3, a door detection switch 5. The reset switch 6 and the shock sensing switch 7 each have one end connected to the power source, and the other end connected to the input side of the timer circuit 4j of the pretension mechanism 4. Further, the time limit circuit 4j has its output side connected to a solenoid 4e.
The solenoid 4e is connected to one end of the solenoid 4e, and the other end of the solenoid 4e is grounded. The webbing detection means 3 has one end connected to the power source, and the other end connected to the input side of the impact sensing switch 8q of the webbing folding mechanism 8, and the output side of the impact sensing switch 8q solenoid 8
The solenoid 8c is connected to one end of the solenoid 8c, and the other end of the solenoid 8c is grounded. Then, after the occupant sits on the seat in the same manner as shown in Figure 4,
The webbing 2 is pulled out from the winding mechanism 1, the webbing 2 is attached to the vehicle body side, and the occupant is restrained to the seat. For example, if the occupant feels pressure due to the force with which the winding mechanism 1 winds up the webbing 2, by switching the reset switch 6 to the on side, Timed circuit 43 m
Since solenoid 4em is supplied to ground, solenoid 4
e is excited for a predetermined time by the time limit circuit 4j. As a result, the braking arm 4b of the pretension mechanism 4 rotates counterclockwise in FIG. 1 and separates from the webbing 2 to release the webbing 2. The webbing 2 is stopped after the webbing 2 is pulled out from the take-up mechanism 1 in accordance with the amount by which the occupant moves away from the seat. Further, for example, when the driver's door is changed from the closed state to the open state, the door detection switch 5 is switched to the on side, and the power is switched from the door detection switch 5 to the time limit circuit 4jm solenoid 4e of the bulletin mechanism 4. → Since the solenoid 4e is supplied to the ground, the solenoid 4e is energized for a predetermined time by the timer circuit 4j, and the webbing 2 is pulled out from the winding mechanism 1 and then stopped in the same way as when the reset switch 6 is switched. In any of the above cases, when the webbing 2 is pulled out by more than a predetermined amount, the webbing detection means 3 outputs a signal. Therefore, if there is a large impact etc. while the webbing 2 is being pulled out more than the predetermined amount,
When the impact sensing switch 7 is turned on, the impact sensing switch 8q of the webbing folding mechanism 8 is also turned on, and the winding mechanism 1 stops pulling out and winding up the webbing 2. By turning on the shock detection switch 7, ■
Power source is shock detection switch 7 => time limit circuit 4jw of pretension mechanism 4 solenoid 4e of pretension mechanism 4
= 4 ground, so the solenoid 4e of the pretension mechanism 4 is energized for a predetermined time by the timer circuit 4j, and at the same time, the impact sensing switch 8q of the webbing folding mechanism 8 is switched on, so that ■ the power is supplied to the webbing detection means. 3# Impact sensing switch 8q of the webbing folding mechanism 8→Solenoid 8C of the webbing folding mechanism 8 is supplied to the ground, so the solenoid 8C of the webbing folding mechanism 8 is energized. The solenoid 4e of the pretension mechanism 4 is a time limit circuit 4j.
When the brake arm 4b is excited for a predetermined time by
After rotating counterclockwise in the figure and separating from the webbing 2 to release the webbing 2, the braking arm 4b returns clockwise in FIG. Set to a restrained state. Also, at the same time as the solenoid 4e of the pretension mechanism 4 is energized, the solenoid 8C of the webbing folding mechanism 8 is activated.
is also energized, so the hook 8b comes off from the lock pin 8g and the rotating arm 8a is rotated by the return spring 8e in the counterclockwise direction in FIG. . As the rotating arm 8a rotates counterclockwise in FIG. Since the winding is stopped, the webbing 2 is folded in the length direction only while the pretension mechanism 4 is releasing the webbing 2, so that the webbing 2 is folded in the same direction as that of the frame 9 to reduce the amount of pulling out. The webbing 2 moves along the longitudinal direction from the top to the bottom in FIG. 1, and after a predetermined time, the pretension mechanism 4 locks the webbing 2 into a restrained state. In other words, the webbing 2 is locked when the webbing 2 reaches the same state as the amount of the webbing 2 that has been pulled out is reduced, thereby reliably restraining the occupant to the seat and ensuring safety.

【Effect of the invention】

As explained above, the seatbelt device according to the present invention includes a seat having a webbing that is attached at one end to a retracting mechanism so as to be retractable, and whose other end is pulled out from the retracting mechanism and attached to the vehicle body. In the belt device, a webbing detection means for detecting the amount of the webbing pulled out is provided near the winding mechanism, and the pulling out and winding of the webbing is stopped after being released for a predetermined time by switching a switch or sensing an impact. A pretension mechanism is provided, and the webbing is activated by sensing an impact while detecting that the webbing has been pulled out more than a predetermined amount to fold the webbing in its length direction. Since the structure is equipped with a webbing folding mechanism that makes it the same as when the amount of webbing is reduced, the amount of webbing that is pulled out can be quickly reduced if there is a large impact when the webbing is pulled out more than the predetermined amount. By doing the same as above, it is possible to securely restrain the occupant in the seat, which is an excellent effect.

[Brief explanation of the drawing]

1 is a partially cutaway side view of a seatbelt device according to an embodiment of the present invention, FIG. 2 is an external perspective view of the seatbelt device shown in FIG. 1, and FIG. 3 is a seatbelt device shown in FIG. 1. A schematic diagram of an electric circuit in a belt device, FIG. 4 is an external view of a conventional seat belt device. 1... Winding mechanism, 2... Webbing. 3... Webbing detection means, 4... Pretension mechanism. 5...(switch) Door detection switch, 6...(switch) Reset switch. 7... Impact detection switch, 8... Webbing folding mechanism. Figure 3 Figure 4

Claims (1)

[Claims] (1) In a seat belt device including a webbing whose one end side is attached to a retracting mechanism so as to be retractable and whose other end side is pulled out from the retracting mechanism and attached to the vehicle body, the webbing is provided near the retracting mechanism. A webbing detection means for detecting the amount of webbing to be pulled out is provided, and a pretension mechanism is provided for stopping the webbing from being pulled out and retracted after being released for a predetermined time by switching a switch or sensing an impact. While it is detected that the webbing is pulled out more than a predetermined amount, the webbing is actuated by sensing an impact and folded in the length direction, which is equivalent to reducing the amount of the webbing pulled out. A seat belt device characterized by being provided with a webbing folding mechanism.