JPS58105852A - Safety device for seat belt automatic fastening apparatus - Google Patents

Abstract

PURPOSE:To prevent a crew's head, etc. from being hit by a moving part by providing a photoelectric switch device including an optical path in the vicinity of the moving end part. CONSTITUTION:The door switch 17 detecting the open or close of the door 2 is connected with the control circuit in the winder 7. When the door switch 17 is set ON, the winder 7 is forwardly rotated, and the seat belt 4 is fastened. When the door switch 17 is made OFF, the winder 7 is reversely rotated and the seat belt 4 is released. The warning area is provided by the photoelectric switchs 8, 9 when the seat belt 4 is fastened. Said switch detect the existance of a human body in the warning area, and control the control circuit. Then, the starting operation of the automatic seat belt fastening apparatus is interrupted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that is used in a device that automatically attaches a seat belt to protect the occupants of a vehicle, etc., and that ensures the safety of the occupants when the seat belt is automatically attached. be.

As is well known, cars are equipped with seatbelts to protect passengers in the event of an accident, and in some cases it is mandatory to keep the seatbelt securely fastened while driving. .

However, in the past, the belt had to be fastened by the passenger holding the belt after getting into the vehicle, which was time-consuming and troublesome, and as a result, people often did not put it on or forgot to put it on. There was a problem that protection was incomplete due to

Therefore, in consideration of this point, an automatic seat belt mounting device that automatically fastens the seat belt when the passenger gets into the car eliminates the need for troublesome operations, ensures the seat belt is fastened, and provides complete protection. is proposed. However, in such automatic seat belt installation devices, a drive device is used to move the seat belt out of the way when getting on and off the vehicle, and then move it to a predetermined tightening position after getting into the vehicle. At times, there is a risk that the moving part may collide with the passenger's head, etc., so safety measures are required.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a safety device that can prevent the moving end of the seat belt from colliding with the passenger's head or the like when the seat belt is automatically fastened.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to drawings showing one embodiment of the present invention. First, an outline of an automatic seat belt fastening device will be described. In Figures 1 to 5, 1 is a car seat, 2 is a door, 3 is a window glass, 4 is a seat belt whose lower end is connected to the side of the seat 1, etc., and 5 is a mechanism for moving the upper end of the seat belt. orbit,
6 is a cable for moving the cable, and 7 is a winding machine for the cable. Further, 8 is a light emitting part of a photoelectric switch for detection in the protection device, and 9 is a light receiving part thereof. 10 is a person who boarded the car and sat in seat 1.

One end of the seat belt 4 is fixed to the vehicle body on the side opposite to the window side next to the seat 1. Further, the other end of the seat belt 4 is fixed to a sliding metal fitting 11. The sliding fitting 11 is covered with a slider 12 made of resin material, which is held on the track 5. Further, the sliding fitting 11 is connected to a winding machine 7 by a cable 6, and its winding force and unwinding force are transmitted to the sliding metal fitting 11 and the sliding metal fitting 11 is moved. The track 5 is fixed to the ceiling part 13 of the vehicle body with tightening screws 14.

Door switch 1 that detects whether door 2 is open or closed
7 is connected to the control circuit 18 of the winding machine 7, and when the door switch 17 is turned on, the winding machine 7 rotates forward to fasten the seat belt 4, and the door switch 17 is turned off. If so, the winder 7 is configured to rotate in the opposite direction to release the seat belt 4.

Therefore, when the door 2 is closed, the door switch 17 is turned on, the winding mode rotates forward, the cable 6 is wound up, and the end of the seat belt 4 on the track 5 side is directed toward the winding machine 7. movement,
The operation of fastening the seat belt 4 is performed. The completion of wearing the seat belt 4 is detected by the belt detection switch 15, and at the same time as the detection, the control switch of the winder 7 is turned off and the winding operation is stopped.

Next, when the door 2 is opened, the door switch 1 is turned off, the winder 7 rotates in the opposite direction, the cable 6 is rewound, and the end of the seat belt 4 on the track 5 side is unwound. The seatbelt 4 moves in the opposite direction to the direction of the taker 7, and the seatbelt 4 is released. The completion of the release of the seat belt 4 is detected by the belt detection switch 16, and at the same time as this detection, the control switch of the winder 7 is turned off, and the winding operation is stopped.

However, when installing and uninstalling this, the seatbelt 4
If the flat head of the person 101 wearing the seatbelt 101 or the person inserted from outside the vehicle is within the movement range of the end of the seatbelt 4 on the track 5 side and the metal fitting 11 (hereinafter referred to as the seatbelt and the 4th end), the seat There is a risk of contact with the belt 4 end.

For example, if the driver wears glasses, the driver may damage the glasses and injure the passenger.

Therefore, the present device uses a photoelectric switch to provide a safe automatic seatbelt fastening device.

That is, in the embodiments shown in FIGS. 6 to 8,
The light emitting part 8 and the light receiving part 9 of the facing type photoelectric switch are fastened to the track 5 between the seat belt 4 and the window glass 3 adjacent to the seat belt 4 so that the vicinity of the moving end of the seat belt 4 is included in the optical path. It is fixed with attached screws 19. Then, as shown in the figure, place the light emitting part 8 of the photoelectric switch on the front (or rear) side.
In addition, a light receiving section 9 is provided on the rear side (or front side), and when the seat belt 4 is fastened, a warning area is created using a photoelectric switch 8°9, and if there is a human body etc. in the warning area, this is detected. By controlling the control circuit 18, the automatic seat belt fastening device is prevented from starting its operation before the start of the seat belt fastening operation. Further, even if a human body or the like enters the warning area during the wearing operation of the device, this is detected and the operation of the winder 7 is immediately stopped to stop the movement of the end portion of the seat belt 4. Alternatively, the winder 7 is rotated in the reverse direction to return the end portion of the seat belt 4 to its original position. In this way, contact between the human body and the end portion of the seat belt 4 is prevented.

Furthermore, the belt detection switch 15 detects the completion of fastening of the seat belt 4, and the photoelectric switch 8.9 is set not to issue a warning from then on.

This prevents a malfunction in which the seatbelt 4 is released if the photoelectric switch 8.9 continues to be alert even when the seatbelt 4 is fastened, when a human body or the like enters the alert area. It's no good.

In this way, by increasing the safety when attaching automatic seat belts for automobiles, the automatic seat belt attaching device can be perfected, which in turn contributes to reducing traffic accidents.

Next, other embodiments of the present invention will be described.

FIG. 9 shows another embodiment of the present invention, in which one light projecting section 8 and two light receiving sections 9 are provided, and the security density is higher than that of the above-mentioned embodiment, and the safety is also high. . The location may be the track 5, the vehicle body, or a similar location as described above.

Figures 10 to 12 show other embodiments of the present invention, and as is clear from the figures, by increasing the number of photoelectric switches 8 and 9, the security density can be further increased, making it safer. be able to.

Also, install the light projecting section 8 and the light receiving section 9 as shown in Fig. 13,
In addition, in the above embodiment, the lower end of the seatbelt is connected to the side of the seat and only the upper end is moved. In addition, the present invention can be similarly applied to seat belts in which the lower end of the seat belt is moved, or both upper and lower ends of the seat belt are moved. Furthermore, the seat belt moving mechanism may be any other mechanism other than the one using a retractor and cable.

As detailed above, according to the present invention, in a device for automatically fastening a seat belt in a car, etc., when the seat belt moves, the possibility that the moving end of the seat belt collides with the passenger's head, etc. can be prevented. It is an effective dog that can be prevented and safety can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a safety device for an automatic seatbelt fastening device according to an embodiment of the present invention, FIG. 2 is a top view thereof, and FIG.
The figure is a front view, Figure 4 is an enlarged sectional view of the main parts, and Figure 5 is a front view.
The figure is a block diagram of the electric circuit configuration, Fig. 6, Fig. 7,
Figures 9 and 10. 11, 12, and 13 are a front view and a side view of a safety device for an automatic seatbelt fastening device according to another embodiment of the present invention, and FIG. 2 is a side view of the main parts thereof. 1...seat, 2...door, 3...
・Window, 4... Seat belt, 5... Track, 6... Cable, 7... Winder, 8
, 8'... Light projecting section, 9, 9'... Light receiving section, 1o0. ...Human body, 11...Metal fittings, 2
0...Reflector. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 4/3 4 5! ? / / Fig. 6 Fig. 7 Fig. 8 Fig. 8.9 Fig. 9 Fig. 10 Fig. 11 Fig. 12 Fig. 307- Fig. 13 Shio

Claims (1)

[Claims] A mounting device is provided that moves at least one end of the seat belt to automatically put it on, and a photoelectric switching device is provided that includes the vicinity of the moving end of the seat belt in its optical path, so that a human body can be placed in the warning area by the photoelectric switching device. 1. A safety device for an automatic seatbelt mounting device, characterized in that the movement of the seatbelt by the mounting device is stopped when the presence of an object such as the object is detected.