JPS5823261B2 - Passive seat belt device - Google Patents

Description

[Detailed description of the invention] The present invention is installed to protect occupants of automobiles, etc.

This invention relates to a passive seat belt device.

In recent years, with the aim of increasing the rate of occupants wearing their seatbelts and reducing injury to occupants in the event of a collision, seatbelts are automatically activated when a door is opened or closed, and the seatbelts are fastened and released regardless of the occupant's will. of.

Passive seat belt devices have been developed to do this.

In such a passive seatbelt device, the present invention aims to improve the feeling of tightening the seatbelt when fastening the seatbelt, improve the ease of getting on and off the seatbelt when releasing the seatbelt, and improve the seatbelt drive mechanism, guide mechanism, etc. in the event of a collision. The purpose of this is to prevent problems in which an excessive load is applied to the device, and an embodiment thereof will be described below with reference to the accompanying drawings.

In FIGS. 1 to 4, 1 is a seat belt, and one end of the seat belt 1 is attached to a vehicle body member (the floor or a member fixed to the floor) under the center side of the seat 10 via a buckle or directly. The other end is attached to the sight rail 3 via the retractor 2 across the seat.

The retractor 12 is applied with a rotational force in the direction of retracting the seatbelt, and normally can pull out the seatbelt against the applied force, but if a large load is applied in the direction of pulling out the belt, the belt will be pulled out. Use one with an emergency locking mechanism to lock the drawer.

Reference numeral 4 denotes a movable member, and the movable member 4 includes a support portion 4a fixed to a slider 4c that slides while being guided by a guide rail 5 installed on the sight rail 3 in the front-rear direction, and a support portion 4a fixed to a slider 4c diagonally forward and downward from the support portion 4a. The upper and lower parts of the arm part 4b have through holes 6a and 6b through which the seat belt 1 is inserted and guided, respectively.
is attached so that it can swing, and the guide rail 5
The engaging portion 7a of the gold wire 7 that passes through the front pillar 9 and reaches the drive source 8 such as an electric motor mounted on the front pillar 9 or a vehicle body member such as an instrument panel portion engages with the support portion 4a. It matches.

The arm portion 4b of the movable member 4 has a retaining portion 4b' provided at its upper base and a locking portion 4a' provided on the support portion 4a, so that the arm portion 4b can perform normal operations such as fastening and releasing the seat belt. The arm part 4b is assembled to the support part 4a so that it will not come off from the support part 4a when a large load is applied to the seat belt, such as in the case of a collision. is slider 4c
When it is fitted and supported on the guide rail 5 via the guide rail 5, its lower part is inclined forward, and its inclination angle is set to almost match the inclination of the upper part of the front pillar 9, as shown in the first figure. Ru.

In the above configuration, when an occupant gets on the vehicle and closes the door, the drive source 8 is driven, operating the Goldwire 7 rearward and moving the movable member 4 rearward.

Then, the seat belt 1 was guided by the through holes 6a and 6b provided on the arm portion 4b of the movable member 4, moved rearward and wound around the retractor 2, and the movable member 4 was positioned at the rear end of the guide rail 5. At this time, the seat belt 1 is fitted across the seated occupant from one shoulder to the other waist, and is in a fastened state.

At this time, the lower end of the arm portion 4b of the moving member 4 is located considerably below the sight rail 3 to which the guide rail 5 is attached,
It was attached to the lower part of the arm portion 4b.

Since the seat belt 1 is inserted and supported by the through hole 6b, the problem of the seat belt 1 coming into contact with or being close to the neck or chin of the occupant, resulting in a so-called hanging condition, is completely eliminated, and the seat belt is maintained in an appropriate state of being worn. The feeling of fastening the seat belt for the occupant is also very good.

When the door is opened, the drive source 8 is driven in the opposite direction, the moving member 4 is guided by the guide rail 5 via the gold wire 7 and moved forward, and the seat belt 1 is moved forward by the retractor 2.
While being pulled out further, the moving member 4 moves forward away from the occupant's body, and reaches the front end of the guide rail 5, where it maintains the seatbelt released state.

At this time, the arm portion 4b of the moving member 4 is substantially along the upper part of the front pillar 9 as shown in the first diagram, and the seat belt 1 is held by the through hole 6b at the upper end of the front pillar 9 or at the lower front part of the roof tile. Therefore, the opening area for passengers to get on and off the vehicle is very small, and it is possible to significantly improve the ease of getting on and off the vehicle.

In the above, in the present invention, when a large load is applied to the seat belt such as in the event of a collision, the arm portion 4b separates from the support portion 4a and falls off, so that an excessive load is not applied to the guide member or drive system members including the gold wire. In addition to preventing such damage, the arm portion 4b that has fallen off can be easily attached to the support portion 4a again and the seat belt can be operated as before, and furthermore, the assembly work of the entire device is simple. It can have many effects.

In the above embodiment, the surfaces of the support portion 4a, arm portion 4b, etc. are coated with an elastic material such as sponge to improve appearance and safety.

If the movement of the moving member 4 is performed using a gold wire having a spiral protrusion around the wire as in the above embodiment, the mechanism will be simple and the movement source 8 for moving the moving member 4 back and forth will be simple.
There is an eleventh point, such as that it can be carried out by the power of When the movable member 4 moves rearward, the drive source 8 is reversely rotated to send out the rope, and the movable member 4 is moved rearward by the winding force of the seat belt 1 of the retractor 2.

Furthermore, although the above embodiment shows an example in which the slider 4c is fixed to the support part 4a, a roller is rotatably attached to the support part 4a instead of the slider 4C, and the roller is guided by the guide rail 5 and rolls. It may be configured as follows.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention.
The figure is an overall side view, FIG. 2 is a front view of the arm, FIG. 3 is a longitudinal cross-sectional view showing how the arm and support are coupled, and FIG. 4 is a perspective view of the vicinity of the engaging part of the arm. . 1... Seat belt, 2... Retractor, 3...
Site rail, 4... Moving member, 4a... Support part,
4b...Arm part, 5...Guide rail, 6a*6
b...Through, 7...Goldewire, 8...Drive source, 9...7° twister-10...Seat.

Claims (1)

[Claims] 1. One end of the seatbelt is attached to a member at the lower side of the central side of the seat, and the other end of the seatbelt is attached to a sight rail via a retractor, a guide rail is provided on the sight rail in the front-rear direction, and the guide rail is supported on the guide rail. A movable member consisting of a support part that extends diagonally forward and downward from the support part is attached so as to be movable forward and backward as the door is opened and closed, and a seat belt is inserted into the lower part of the arm part of the movable member. The movable member is provided with a guiding through;
A passive seatbelt is characterized in that the arm part of the seatbelt is attached in such a way that it can fall off from the support part when a load exceeding a predetermined value is applied to the seatbelt. Place.