JP4501221B2 - Buckle device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a buckle device that constitutes a part of a seat belt device such as an automobile, and more particularly to a buckle device that includes an impact absorbing mechanism.
[0002]
[Prior art]
As is well known, the seat belt device includes a seat belt that is routed along the body of an occupant such as an automobile, a retractor that winds up the seat belt, a buckle device that is provided with a tongue provided on the seat belt, and the like. I have.
[0003]
A pretensioner may be provided in the buckle device in order to quickly take the seat belt and bring the seat belt into close contact with an occupant when the automobile collides. The pretensioner moves the buckle body to which the tongue is attached in a downward direction, and applies tension (pretension) to the seat belt.
[0004]
A shock absorbing mechanism (EA mechanism) that absorbs the impact applied to the occupant by gradually feeding out the seat belt while resisting the tension when the occupant rests on the pre-tensioned seat belt. There is a seat belt device provided.
[0005]
Conventional EA mechanisms are often built into retractors. An EA mechanism is also used in which the seat belt is partially folded so as to shorten the length in the longitudinal direction, and the folded portion is sewn with a tearable thread (tear seam).
[0006]
[Problems to be solved by the invention]
In order to give the EA function to both the shoulder belt and the lap belt, it is necessary to provide an impact absorbing mechanism for each.
[0007]
An object of this invention is to provide the buckle apparatus provided with the impact absorption mechanism which can perform the impact absorption of both a shoulder belt and a lap belt by one mechanism.
[0008]
[Means for Solving the Problems]
The buckle device of the present invention (Claim 1) is a buckle device having a buckle body to which a tongue of a seat belt is attached and a pretensioner for retracting the buckle body in an emergency. The buckle body moves in the direction in which the buckle body is pulled by the seat belt while applying a drag to the buckle body when a predetermined tensile force is applied from the seat belt to the buckle body. A shock absorbing mechanism that allows the wire to be connected, one end of the wire is connected to the pretensioner, the other end of the wire is connected to the shock absorbing mechanism, and the middle of the wire is locked to the buckle body. A buckle device comprising: a base extending from a cylinder of the pretensioner; A corrugated pipe whose one end is in contact with the base 17, and a clamp which is in contact with the other end of the corrugated pipe. The wire extends from the hole to the corrugated pipe. It passes through the pipe and is fastened to the clamp .
[0010]
In the buckle device of the present invention, when a predetermined forward force (tensile force) is applied to the buckle body from the seat belt side due to an automobile collision or the like, a drag is applied to the buckle body by the impact absorbing mechanism. The buckle body moves forward (moves in the direction pulled by the seat belt) and the impact applied to the occupant is absorbed.
[0011]
As the buckle body moves forward, the impact is absorbed by both the lap belt and the shoulder belt.
[0012]
In the present invention, one end of the wire is connected to the wire tip fixing member or the pretensioner, the other end of the wire is connected to the shock-absorbing mechanism, the middle of the wire that has been locked in the buckle body.
[0013]
In the present invention, the shock absorbing mechanism is thus configured to the corrugated pipes to be shortened push the pipe longitudinal direction by the upper Symbol advancing force.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is an overall view of a seat belt apparatus provided with a buckle device according to an embodiment, FIG. 2 is a side view of the buckle device, and FIG. 3 is a cross-sectional view of an impact absorbing mechanism. 3 (a) shows the state before shock absorption, FIG. 3 (b) shows the time of shock absorption operation, and FIG. 3 (c) shows a cross section taken along the line CC in FIG. 3 (a).
[0015]
The seat belt 1 of this seat belt device is connected to a retractor 2 so that one end of the seat belt 1 can be wound, and the other end is fixed to the vehicle body by an anchor 3. In the middle of the seat belt 1, the shoulder anchor 4 and the tongue 5 are respectively passed.
[0016]
The buckle device 6 to which the tongue 5 is attached has a buckle body 7, a pretensioner 8, and an impact absorbing mechanism 9. The buckle body 7 is provided with an insertion port 7a for the tongue plate 5a and a press button 7b for releasing the latch, and a latch mechanism for the tongue plate 5a is provided therein.
[0017]
As shown in FIG. 2, the pretensioner 8 includes a wire 10 for pulling the buckle body 7, a piston 11 to which one end of the wire 10 is connected, a cylinder 12 that accommodates the piston 11, and a retraction of the piston 11. A gas generator 13 that generates a gas pressure for causing the wire 10 to move, and a wedge clamp 14 that allows the wire 10 to move backward (rightward movement in FIG. 2) and prevent forward movement (leftward movement in FIG. 2). is doing.
[0018]
Wire 10 is directed to the buckle main body 7 along guide 15, it is wound in a substantially U-shape wrapping portion 16 provided on the buckle main body 7. The other end of the wire 10 is connected to the shock absorbing mechanism 9.
[0019]
The shock absorbing mechanism 9 includes a base 17 extending from the cylinder 12 of the pretensioner 8, a hole 18 provided in the base 17, a corrugated pipe 19 having one end in contact with the base 17, and the corrugated And a clamp 20 in contact with the other end of the pipe 19. The wire 10 passes through the corrugated pipe 19 from the hole 18 and is fastened to the clamp 20.
[0020]
When the collision of the automobile is detected, the gas generator 13 is activated, and the piston 11 is moved to the right in FIG. 2 by the jet gas pressure. Pretension is applied to the seat belt 1.
[0021]
In this state, when the occupant rests on the seat belt 1, a forward force (a tensile force directed upward in FIGS. 1 and 2) is applied to the buckle body 7. When this forward force exceeds a predetermined value, the corrugated pipe 19 is compressed in the longitudinal direction of the pipe as shown in FIG. 3 (b), and the buckle body 7 gradually moves upward. And the impact applied to a passenger | crew by the deformation | transformation of this corrugated pipe 19 is absorbed. At this time, the wedge clamp 14 strongly locks the wire 10 and the wire 10 is not pulled out of the cylinder 12. As the buckle body 7 is raised, the impact applied to the occupant is absorbed by both the shoulder belt 1a and the lap belt 1b of the seat belt 1.
[0029]
【The invention's effect】
As described above, according to the present invention, there is provided a buckle device capable of absorbing shock in both a lap belt and a shoulder belt.
[Brief description of the drawings]
FIG. 1 is an overall view of a seat belt device including a buckle device according to an embodiment.
FIG. 2 is a side view of the buckle device of FIG. 1;
FIG. 3 is a cross-sectional view of an impact absorbing mechanism .
[Explanation of symbols]
1 the seat belt 5 the tongue 6 buckle device 7 buckle body 8 pretensioner 9 shock absorbing mechanism 10 Wire 11 piston 12 cylinder 13 the gas generator 19 corrugated pipes

Claims (1)

In a buckle device having a buckle body to which a tongue of a seat belt is attached, and a pretensioner for retracting the buckle body in an emergency,
After the buckle body is retracted, the occupant rests on the seat belt, and when a tensile force of a predetermined level or more is applied from the seat belt to the buckle body, the buckle body An impact absorbing mechanism allowing movement in the direction pulled by the seat belt ;
A buckle device in which one end of a wire is connected to the pretensioner, the other end of the wire is connected to the shock absorbing mechanism, and the middle of the wire is locked to the buckle body,
The shock absorbing mechanism includes a base extending from the cylinder of the pretensioner, a hole provided in the base, a corrugated pipe having one end abutting against the base 17, and an abutting against the other end of the corrugated pipe. A buckle device , wherein the wire passes through the corrugated pipe from the hole and is fastened to the clamp .

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