JPH07309201A - Seat belt - Google Patents

Abstract

PURPOSE:To provide a seat belt with no damage to a seated person during the operation. CONSTITUTION:An inflater bomb is mounted at the end 3 of a belt mainbody 2 to inflate gas during the operating a seat belt 1. The belt mainbody 2 folded at both side edges 5, 5 and sutured at both side edges 5, 5 strongly enough to be defolded with gas pressure during shock is formed into an air-tight bag shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat belt for an automobile.

[0002]

2. Description of the Related Art In a conventional seat belt a, as shown in FIG. 5, a belt end b on one end side is fixed to a vehicle body f, and another end side c extends from a retractor to a position intermediate the belt end b. The seat belt is engaged with the buckle e via the provided tongue d so that the seatbelt can be worn by the seated person.

[0003]

However, the seat belt a as described above has a narrow belt width, and a load is applied to the seat belt a having a narrow width when the seat belt is actuated, and the seat belt a bites into the body of the seated person and is locally worn. There was a problem that it hurt. In addition, if the belt width is too wide, the comfort of the seat will deteriorate, and therefore, the belt width of the seat belt is limited.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a seat belt which does not damage a seated person during operation.

[0005]

In order to achieve the above object, a seat belt according to the present invention is provided with an inflator cylinder for swelling gas at the end of the belt main body, the gas being inflated at the end of the seat main body. The both side edges of the belt body are folded, and the both side edges are sewn to the strength at which the folding is released by the gas pressure at the time of impact operation to form an airtight bag.

[0006]

With this construction, the pressure of the inflator cuts the suture of the belt main body at the time of operation and the folds are released and widened, so that the contact pressure with the body is reduced and the seated person is not damaged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a seat belt according to the present invention, and FIG. 2 is a sectional view of the seat belt.

As shown in the figure, the seat belt 1 includes a belt body 2 extending from the retractor 6 and reaching the belt terminal 3. A tongue 7 is slidably mounted in the middle of the belt body 2, and the belt body 2 is pulled out from one shoulder 11 of the seated person to the thigh 12 on the opposite side, and the tongue 7 is fixed to the vehicle body 8. The buckle 9 is engaged and the seat belt 1 is worn.

The belt body 2 is formed in a bag shape, and the inside of the bag is kept airtight and serves as a gas passage. Further, both side edges 5 and 5 of the belt body 2 are folded on the side opposite to the human body side 2a, and seams of the both side edges 5 and 5 are sewn with a holding thread 10. The strength of the holding yarn 10 is set to such a level that the holding thread 10 is cut by the pressure of an inflator (expansion gas) described later when the seat belt 1 is operated.

Further, as shown in FIG. 3, the belt terminal 3 is swingably attached to the vehicle body 8.
An inflator cylinder 4 is attached to the. The tip 4a of the inflator cylinder 4 is connected to the bag-shaped belt body 2, and the inflation gas is set to swell from the inflator cylinder 4 into the belt body 2 when the seat belt 1 is operated.

Therefore, the seat belt 1 can be damaged by a vehicle collision or the like.
Is activated, the holding yarn 10 of the fold is cut by the gas pressure of the inflator, the fold is released in the direction of the arrow, and the fold is expanded as shown in FIG. Therefore, since the width of the human body side 2a is wide, even if a large load is applied to the belt main body 2, the contact pressure with the body becomes small and the seated person is not locally damaged.

Further, since the idle running extension of the retractor 6 is offset by the expansion of the belt body 2, the operating efficiency of the seat belt 1 is improved.

Further, when the seat belt 1 is operated, the holding thread 10 of the belt body 2 is cut by the fuse effect against the gas pressure and the fold is released.

[0015]

As described above, the inflator cylinder for inflating gas when the seat belt is impacted is attached to the end of the belt body, and the belt body is folded by folding the side edges of the belt body. Is sewn to the strength at which the folding is released by the gas pressure at the time of impact operation, and is configured as an airtight bag, so that the belt body is sewn by the pressure of the inflator at the time of operation and the fold is released and expanded widely. As a result, the contact pressure with the body is reduced, and a seat belt that does not damage the seated person can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat belt according to the present invention.

FIG. 2 is a sectional view of a belt body of the seat belt.

FIG. 3 is a perspective view of a belt terminal of the seat belt.

FIG. 4 is a cross-sectional view of the belt body when the seat belt is operating.

FIG. 5 is a perspective view of a seat provided with a conventional seat belt.

[Explanation of symbols]

 1 seat belt 2 belt body 3 belt terminal 4 inflator cylinder 5 side edge

Claims (1)

[Claims] 1. An inflator cylinder, which swells gas when a seat belt is impacted, is attached to an end of a belt body,
A sheet characterized in that the belt main body is formed into a bag shape having airtightness by folding both side edges of the belt main body and stitching the both side edges to a strength at which the folding is released by gas pressure at the time of impact operation. belt.