JPH077232Y2 - Automobile seat belt device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a seat belt device for an automobile.

(Prior Art) Some seat belt devices for automobiles have been developed in Japanese Utility Model Laid-Open No. 57-5195.
As seen in Japanese Patent Publication No. 9, there is a seat back provided with a belt guide in order to enhance the usability of the seat belt. In this type of automobile seat belt device, a seat belt passing through the belt guide is wound by a retractor.

However, due to the layout, the following points become a problem when the retractor is arranged at the front end of the rear seat door. That is, since the retractor locks the seat belt at the time of a collision, the seat belt is restrained at the time of a collision and the opening angle of the rear seat door may be restricted, so that the retractor may not be opened greatly.

Therefore, an object of the present invention is to provide a vehicle seat belt device that does not hinder the opening angle of the rear seat door even when the retractor is locked.

(Means and Actions for Solving Problems) The present invention focuses on the action direction of the force applied to the belt guide at the time of collision and the speed at which the force is applied when the retractor is arranged at the front end of the rear seat door. It was made. That is, to explain in detail with reference to FIG. 1, when the retractor 2 is arranged at the front end portion of the rear seat door 1, the seat belt 4 passing through the belt guide 3 becomes a bending point of the belt guide 3 and an obtuse angle on the outside of the vehicle. It will be bent as θ. Therefore, when the retractor 2 is locked during a collision, the tension of the seat belt 4 causes the belt guide 3 to move.
A force F to the outside of the vehicle acts on the vehicle at a high speed.
Focusing on such force F, in the present invention, a seat belt device for an automobile, in which a belt guide is arranged in a seat back of a front seat, and a seat belt passing through the belt guide is wound by a retractor. The retractor is provided at a front end of a rear seat door that is opened rearward, and the belt guide has a set position located inside the vehicle,
It is movable between a preset position located outside the vehicle and a biasing means for biasing the belt guide to the set position and a force applied to the vehicle outside at a high speed to the belt guide. Only the locking means for restricting the movement of the belt guide is additionally provided.

With such a configuration, at the time of collision, the force F outwardly acts on the belt guide 3 at a high speed at the time of collision, so that the lock means is positioned at the set position by the urging means. The movement of the belt guide 3 is restricted, and as a result, the original function of the seat belt 4, that is, the occupant protection function is exhibited. And after the collision,
When the speed at which the force F acting on the belt guide 3 is applied becomes slow, the belt guide 3 moves in the vehicle exterior direction without being restricted by the locking means. The rear seat door 1 can be widely opened by the movement allowance of the belt guide 3.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 2 and 3, 10 is an interior of an automobile, and a seat belt 14 is provided on a front seat 12 thereof. The seat belt 14 is composed of a waist belt 14a and a shoulder belt 14b,
It is a so-called three-point type, and when used, it is inserted into a buckle 16 that is fixedly installed on the indoor side.

The shoulder belt 14b is connected at its base end to the retractor 18 and is wound up by the retractor 18. The retractor 18 is arranged at the front end of the rear seat door 20 which is a front hinge. ing. The shoulder belt 14b extending from the retractor 18 extends into the vehicle interior 10 from the opening 22 at the upper front end of the rear seat door 20 and passes through the vehicle outer side shoulder portion 24a of the seat back 24 in the front seat. A belt guide 26 is disposed on the vehicle outer side shoulder portion 24a, and the shoulder belt 14b is inserted through the belt guide 26.

As shown in FIGS. 4 and 35, the belt guide 26 has a belt insertion opening 26a, and a rod 28 extending substantially in the vehicle width direction is integrally provided on the inside of the vehicle interior of the belt guide 26a. It is housed through the cylinder 30. The cylinder 30 is fixed to the shoulder portion 24a of the seat back 24, and a piston 32 is fitted and inserted into the cylinder 30 as shown in FIG. Two chambers, 34 and a car interior chamber 36, are defined, and these two chambers 34,36
Is filled with oil liquid. The piston 32 is integrated with the rod 28, and the piston 32 has the two chambers 3
An orifice 38 communicating with 4, 36 is provided. The piston 32 is urged in the vehicle inward direction by the compression spring 40 arranged in the vehicle outer chamber 34.

With the above structure, the belt guide 26
Is positioned inside the vehicle by the urging force of the compression spring 40 (set position). At the time of a collision, the retractor 18 is locked, and the occupant B causes a sudden tension on the shoulder belt 14b. As a result, the force F acts on the belt guide 26 in the vehicle exterior direction,
Since the force F is applied rapidly, the displacement of the belt guide 26 is restricted by the action of the orifice 38, the belt guide 26 is set at the set position, and the original function of the shoulder belt 14b, that is, the occupant protection function is maintained. To be demonstrated. And
After the collision, when the speed at which the force F acting on the belt guide 26 is applied becomes slow, the oil liquid in the cylinder 30 moves to the vehicle interior chamber 36 through the orifice 38, and as a result, the belt guide 26 reaches the stroke end in the vehicle exterior direction. It is displaced (preset position), and by this displacement of the belt guide 26, the rear door 20 can be greatly opened by the displacement.

(Effect of the Invention) As is apparent from the above description, according to the present invention, the function of the seat belt is exerted at the time of a collision, and after the collision, the restraint of the rear seat door by the seat belt is relaxed. It does not hinder the opening angle of the rear door.

[Brief description of drawings]

FIG. 1 is an explanatory view of the operation of the present invention, FIG. 2 is a layout diagram of a seat belt device according to an embodiment, FIG. 3 is a layout diagram of the seat belt device according to the embodiment seen from the inside of the vehicle, and FIG. FIG. 5 is a perspective view of the belt guide, and FIG. 5 is a sectional view taken along line VV of FIG. 14: Seat belt 14b: Shoulder belt 18: Retractor 20: Rear seat door 24: Seat back 26: Belt guide 30: Cylinder 32: Piston 38: Orifice 40: Compression spring

Claims (1)

[Scope of utility model registration request] 1. A seat belt device for an automobile, in which a belt guide is disposed in a front seat back, and a seat belt passing through the belt guide is wound by a retractor, wherein the retractor is opened rearward. Provided at the front end of the rear seat door, the belt guide, a set position located inside the vehicle,
It is movable between a preset position located outside the vehicle and a biasing means for biasing the belt guide to the set position and a force applied to the vehicle outside at a high speed to the belt guide. A seat belt device for an automobile, characterized in that a locking means for restricting movement of the belt guide is additionally provided.