JP2001138853A - Holding structure of corrugated tube in air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of holding a corrugated tube 22 in which a wire harness 20 as a wiring part to an air bag device 10 is passed inside on the outer wall surface of an air bag case 12, capable of simply and stably holding the corrugated tube 22. SOLUTION: This holding structure has a holding part 34 for holding the side of the corrugated tube 22 to be clamped in a bracket 26 for fixing to a reinforcement 24 fitted to the outer wall surface of an air bag case 12 and a guide part 36 for guiding the corrugated tube 22 to the holding part 34. A gap 38 for inserting the corrugated tube 22 guided to the guide part 36 in the holding part 34 is set smaller than an outside diameter 40 of the corrugated tube 22 to prevent the corrugated tube 22 from slipping off from the holding part 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding a corrugated tube in an airbag device, and more particularly, to a corrugated tube through which a wire harness as a wiring component to the airbag device is passed. It relates to a structure to be held on the outer wall surface.

[0002]

2. Description of the Related Art Conventionally, in an airbag device,
A wire harness is connected to an inflator housed in an airbag case as electric wiring for operating the device. Such a wire harness is covered with a corrugated tube which is a flexible plastic molded tube having a bellows shape in order to prevent injury. The corrugated tube is held on the outer wall surface of the airbag case to stabilize wiring to the inflator.

FIG. 8 shows a structure for holding a corrugated tube 100 in a conventional airbag apparatus. This airbag device is a passenger airbag device fixed via a bracket 102 to a reinforcement 101 which is a reinforcing member in an instrument panel, and a side surface of an airbag case 103 is connected to an inflator 104. A terminal 105 is provided, and this connection terminal 10
5 is connected to the corrugated tube 100.

In this holding structure, the airbag case 10
A holding member 106 for holding the corrugated tube 100 is attached to the side surface of the third member 3. Corrugated tube 1
00 is covered with a holding tubular member 107, and a part 108 having a clamp structure provided on the tubular member 107 is clamped (fitted) into a hole 109 provided on the holding member 106, so that the corrugated tube 100 is air-tight. It is held in the bag case 103.

FIG. 9 shows a conventional corrugated tube 100.
13 shows another holding structure. In this case, a mounting portion 111 to which the tubular member 107 of the corrugated tube 100 is mounted is provided on a bracket 102 for fixing to the rein hose 101 mounted on the bottom surface of the airbag case 103, and a hole 112 provided in the mounting portion 111 is provided. By clamping the clamp part 108 of the tubular member 107, the corrugated tube 100 is connected to the airbag case 1.
03.

[0006] As another structure for holding the corrugated tube in the airbag case, there is a structure in which the corrugated tube is fixed to the bottom surface of the airbag case with tapes.

[0007]

However, FIG.
In the conventional holding structure as shown in FIG. 9, since it is necessary to attach the tubular member 107 to the corrugated tube 100,
Holding work is troublesome.

Accordingly, an object of the present invention is to provide a holding structure that can easily, stably, and inexpensively hold a corrugated tube in an airbag case.

[0009]

According to a first aspect of the present invention, there is provided a structure for holding a corrugated tube in an airbag device, wherein the corrugated tube through which a wire harness, which is a wiring component for the airbag device, is passed through the inside of the airbag device. A structure for holding on the outer wall surface of the case, a holding member for holding the corrugated tube so as to sandwich the corrugated tube is mounted on the outer wall surface of the airbag case, and the holding member holds a side surface of the corrugated tube, A guide portion for guiding the corrugated tube is provided in the holding portion,
A gap for inserting the corrugated tube guided by the guide portion into the holding portion is set smaller than an outer diameter of the corrugated tube.

In this holding structure, when attaching the corrugated tube to the outer wall surface of the airbag case, the corrugated tube is pushed into the holding member from the guide portion side. Then, the corrugated tube is guided by the guide portion and reaches the gap of the holding portion. Although this gap is set smaller than the outer diameter of the corrugated tube, the corrugated tube is elastically deformed by its flexibility, so that it is pushed into the holding portion through the gap and thereby held by the holding portion. The retained corrugated tube is prevented from dropping from the retaining portion because the gap for insertion is smaller than the diameter of the corrugated tube. As described above, according to the present invention, it is possible to easily hold the corrugated tube on the outer wall surface of the airbag case by simply pushing the corrugated tube with a finger, and to obtain a stable holding structure.

According to a second aspect of the present invention, in the first aspect, the holding member is integrated with a fixing member attached to an outer wall surface of the airbag case to fix the airbag case to a vehicle structure. It is characterized by being provided in.

As described above, by providing the structure for holding the corrugated tube on the fixing member for fixing the airbag case, the number of parts can be reduced and the cost can be reduced. Here, as such a fixing member, a bracket for fixing the airbag case to a reinforcement, which is a reinforcing member disposed in the instrument panel, and an airbag inflating the airbag case in the instrument panel. A bracket for fixing the opening to the outlet opening, a bracket for fixing the airbag case to a door wall protruding from an airbag door covering the opening, and the like can be given.

According to a third aspect of the present invention, in the first aspect, the holding portion is formed by a holding piece for holding the corrugated tube between the holding portion and an outer wall surface of the airbag case. And the guide portion is formed so that the distal end is further away from the outer wall surface of the case.

In this case, at the time of mounting, the corrugated tube is pushed between the guide portion and the outer wall surface of the airbag case. Then, since the guide portion is formed so as to be farther away from the outer wall surface of the case toward the distal end, the corrugated tube is satisfactorily guided by the guide portion into the gap between the holding portion and is sandwiched between the holding portion and the outer wall surface of the case. It is kept in the state where it was.

According to a fourth aspect of the present invention, in the first aspect, the holding portion holds the corrugated tube between the receiving portion on the airbag case side that receives a side surface of the corrugated tube and the receiving portion. The receiving portion has a locking projection for locking the corrugated tube, and the gap for inserting the corrugated tube between the locking projection and the holding piece. Is formed, and the guide portion is provided at the tip of the holding piece. The guide portion extends beyond the locking projection, and the gap between the tip and the outer wall surface of the airbag case is formed by the corrugated tube. It is characterized in that it is set to be larger than the outer diameter of.

In this case, when the corrugated tube is pushed into the holding member at the time of mounting, the gap at the tip of the guide portion for receiving the corrugated tube is larger than the outer diameter of the corrugated tube. It is guided by the gap of the holding portion, climbs over the locking projection while elastically deforming, and is held by the holding portion in a state sandwiched by the receiving portion and the holding piece.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an airbag apparatus 10 showing a holding structure of a corrugated tube according to a first embodiment of the present invention, FIG. 2 is a sectional view of the holding structure, and FIG. It is an exploded perspective view shown.

The airbag device 10 is a passenger airbag device disposed at a position corresponding to a passenger seat in an instrument panel of an automobile. An airbag case 12 which opens upward has an inflator. 14 and an airbag 16 are stored.

As shown in FIG. 3, a connection terminal 18 of the inflator 14 is arranged on a side surface of the airbag case 12, and the connection terminal 18 is connected to an airbag device pulled out of a wire harness running in an instrument panel. Wiring harness 20 is connected. The wire harness 20 is covered with a corrugated tube 22 which is a flexible plastic molded tube having a bellows shape.

On the bottom surface 12a of the airbag case 12,
A bracket 26 for fixing to a reinforcement 24 as a reinforcing member in the instrument panel is attached. Specifically, as shown in FIG. 3, two brackets 26 are arranged in the vehicle width direction, and these are fixed via bolts and nuts on a table 27 fixed to the reinforcement 24.

The bracket 26 is used for the reinforcement 2
4, and a bottom surface 12 a of the airbag case 12 extending from three sides of the fixed surface portion 28 and extending from three sides of the fixed surface portion 28.
And three attachment pieces 30 attached to the camera.

In the present embodiment, the bracket 26 is provided with a holding structure for holding the corrugated tube 22. Hereinafter, the holding structure will be described.

The bracket 26 is provided with a plate-like holding piece 32 for holding the corrugated tube 22 between the other side of the fixed surface portion 28 and the case bottom surface 12a. As shown in FIG. 1, the holding piece 32 is
8 to the case bottom surface 12a.
It is bent outward just before. A holding portion 34 for holding the side surface of the corrugated tube 22 is formed at a portion extending outward from the bent portion, and a guide portion 36 for guiding the corrugated tube 22 to the holding portion 34 is provided at the tip thereof. I have.

The holding portion 34 is disposed opposite to the case bottom surface 12a, and forms a holding space for the corrugated tube 22 with the case bottom surface 12a. The holding portion 34 has an arc shape in cross section along the outer shape of the corrugated tube 22. By disposing the corrugated tube 22 inside the arc shaped holding portion 34, the corrugated tube 22 is pressed against the case bottom surface 12a. In this state, the corrugated tube 22 is held in a slightly compressed state with the case bottom surface 12a.

The guide portion 36 extends from the tip of the arc-shaped holding portion 34, and is formed so as to be inclined slightly downward so as to be away from the case bottom surface 12a toward the tip.

As shown in FIG. 2, an insertion gap 38, which is an opening of the holding portion 34 for inserting the corrugated tube 22 into the holding portion 34, is formed between the tip 34a of the holding portion 34 and the case bottom surface 12a. The gap 38 (the height of the gap) is formed by the corrugated tube 2 from the holding portion 34.
2 is set smaller than the outer diameter 40 of the corrugated tube 22.

The gap 42 between the distal end 36a of the guide portion 36 and the case bottom surface 12a is set to be larger than the outer diameter 40 of the corrugated tube 22 in order to guide the corrugated tube 22 into the insertion gap 38 well. ing.

When attaching the corrugated tube 22 to the holding portion 34 of the bracket 26, as shown in FIG. 2, the corrugated tube 22 is pushed into the gap 42 between the guide portion 36 and the case bottom surface 12a with a finger as it is. Then, the corrugated tube 22 is guided by the guide portion 36 to reach the insertion gap 38, where the corrugated tube 22 elastically deforms due to its flexibility and slides into the holding portion 34, and the holding portion 3.
4 and the case bottom surface 12a.

As described above, with the holding structure of the present embodiment, the corrugated tube 22 can be easily held on the bottom surface 12a of the airbag case 12 simply by pushing the corrugated tube 22 with a finger.

Also, the held corrugated tube 22
Since the insertion gap 38 is sufficiently smaller than the outer diameter 40 of the corrugated tube 22, it does not come off from the holding portion 34 unless a force is applied, and has a stable holding structure.

Further, since the corrugated tube 22 is held by using a part of the bracket 26 for fixing the airbag case 12 to the rein hose 24, a dedicated component for holding the corrugated tube 22 is unnecessary. Therefore, the number of parts can be reduced and cost can be reduced.

FIG. 4 is a front view of an airbag device 10 showing a corrugated tube holding structure according to a second embodiment.
FIG. 5 is a sectional view taken along line AA of FIG.

The holding structure according to the second embodiment includes a bracket 2
6 is different from the holding structure of the first embodiment described above. Hereinafter, components denoted by the same reference numerals as those in the first embodiment have the same configuration unless otherwise specified.

The holding piece 32 of the second embodiment has a plate shape narrower than that of the first embodiment. As shown in FIG. 5, the holding portion 34 extends from the fixed surface portion 28 to the case bottom surface 12a while being inclined outward, and a holding portion 34 for holding the side surface of the corrugated tube 22 is formed in the middle thereof, and a corrugated portion is provided at the tip portion. A guide portion 36 for guiding the tube 22 to the holding portion 34 is formed.

The holding portion 34 is disposed opposite to the case bottom surface 12a and holds the corrugated tube 22 in a state where the corrugated tube 22 is pressed against the case bottom surface 12a. The corrugated tube 22 bent at a right angle and inserted into the holding portion 34 is formed by a locking projection 46 which locks the corrugated tube 22 so as not to go further inside (to the left in FIG. 5).

The guide portion 36 extends forward from the front end of the holding portion 44, and the front end of the case bottom 12a is closer to the front end.
It is formed so as to be inclined slightly downward so as to be away from it.

As in the first embodiment, an insertion gap 38 for inserting the corrugated tube 22 is formed between the tip of the holding portion 34 and the case bottom surface 12a. It is set smaller than the diameter 40. The gap 42 between the tip of the guide portion 36 and the case bottom surface 12 a is set to be larger than the outer diameter 40 of the corrugated tube 22.

Also in this embodiment, as in the first embodiment, the corrugated tube 22 is pushed into the gap 42 between the guide portion 36 and the case bottom surface 12a with a finger as it is, so that the corrugated tube 22 is moved to the holding portion 34 and the case bottom surface. 12a can be held in a state sandwiched between
The same effect as that of the embodiment can be obtained.

FIG. 6 is a sectional view of a corrugated tube holding structure according to the third embodiment, and FIG. 7 is a front view of the holding structure.

The holding structure of the third embodiment is different from the first embodiment in which the corrugated tube 22 is sandwiched between the bracket 26 and the case bottom surface 12a, in that the corrugated tube 22 is held in the bracket 26. This is different from the first and second embodiments. Hereinafter, components denoted by the same reference numerals as those in the first embodiment have the same configuration unless otherwise specified.

In the third embodiment, the receiving portion 50 of the airbag case 12 for receiving the side surface of the corrugated tube 22 and the receiving portion 50 are disposed between the receiving portion 50 and the corrugated tube 2.
From the holding piece 52 for holding the corrugated tube 2
2 is formed.

More specifically, the fixing surface 28 of the bracket 26
A plate-like holding piece 52 projects outward from one side.
The holding piece 52 extends slightly inclining so that the tip end approaches the case bottom surface 12a. Further, a hook-shaped receiving portion 50 for receiving the side surface of the corrugated tube 22 is provided on a wall 54 erected from the left and right opposite sides of the fixed surface portion 28 toward the case bottom surface 12a. Receiving part 5
A pair 0 is formed so that the corrugated tube 22 pressed upward by the holding piece 52 is received on both left and right sides.

At the front end of the receiving portion 50, a locking projection 54 for locking the corrugated tube 22 in the receiving portion 50 is provided. An insertion gap 38 for inserting the 22 is formed. The gap 38 is set smaller than the outer diameter 40 of the corrugated tube 22 as in the first embodiment.

A guide portion 56 for guiding the corrugated tube 22 to the receiving portion 50 is formed at the tip of the holding piece 52. The guide portion 56 extends beyond the locking protrusion 54 while being inclined slightly upward, and a gap 58 between the tip end 56a and the case bottom surface 12a is set to be larger than the outer diameter 40 of the corrugated tube 22.

In this embodiment, the corrugated tube 2
When the bracket 2 is held by the bracket 26, the corrugated tube 22 is pushed into the gap 58 at the end of the guide portion 56 as shown in FIG. At this time, since the gap 58 is larger than the outer diameter 40 of the corrugated tube 22, the corrugated tube 22 easily slides into the gap 58. The corrugated tube 22 that has slid between the guide portion 56 and the case bottom surface 12a is guided by the guide portion 56 to reach the insertion gap 38, where it passes over the locking projection 54 while being elastically deformed by its flexibility. Thus, it is held in a state sandwiched between the receiving portion 50 and the holding piece 52.

As described above, in the third embodiment, as in the first embodiment, the bottom surface 12a of the airbag case 12 can be easily formed by simply pushing the corrugated tube 22 with a finger.
Can be held. Further, a stable holding structure can be obtained, and the cost can be reduced by reducing the number of parts.

In each of the above-described embodiments, the holding structure for the corrugated tube 22 is provided on the bracket 26 for fixing to the reinforcement 24. However, such a holding structure is provided by attaching the airbag case to the instrument panel. Various types of vehicles, such as a bracket for fixing the airbag inflating opening in the vehicle and a bracket for fixing the airbag case to a door wall protruding from an airbag door covering the opening of the airbag case. It can be provided on a fixing member attached to the outer wall surface of the airbag case for fixing to the structure.

Instead of being integrated with such a fixing member, a dedicated holding member having the holding structure of the above embodiment may be attached to the outer wall surface of the airbag case to hold the corrugated tube.

[0050]

According to the holding structure of the corrugated tube of the present invention, the corrugated tube can be easily held on the outer wall surface of the airbag case by simply pushing the corrugated tube with a finger, and the corrugated tube is stably held. Can be done.

In particular, according to the holding structure of the second aspect,
By providing the holding structure for the corrugated tube in the fixing member for fixing the airbag case to the vehicle structure, a dedicated holding member for holding the corrugated tube is not required, and the cost can be reduced by reducing the number of parts. Can be.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an airbag device showing a corrugated tube holding structure according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of the holding structure.

FIG. 3 is an exploded perspective view showing the holding structure.

FIG. 4 is a front view of an airbag device showing a corrugated tube holding structure according to a second embodiment.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a cross-sectional view of a corrugated tube holding structure according to a third embodiment.

FIG. 7 is a front view showing a main part of the holding structure.

FIG. 8 is a perspective view showing a conventional corrugated tube holding structure.

FIG. 9 is a perspective view showing another holding structure of a conventional corrugated tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Airbag apparatus 12 ... Airbag case 12a ... Case bottom surface 20 ... Wire harness 22 ... Corrugated tube 24 ... Reinforcement 26 ... Bracket 32 ... Holding piece 34 ... Holding part 36 ... Guide part 38 ... Insertion gap 40 ... Corrugated Tube outer diameter 50 receiving part 52 holding piece 54 locking projection 56 guide part 58 gap

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masakatsu Otsuka 1-17-18 Edobori, Nishi-ku, Osaka-shi, Osaka Toyo Tire & Rubber Co., Ltd. (72) Inventor Yoshinori Mihara 1-17-18 Edobori, Nishi-ku, Osaka-shi, Osaka No. Toyo Tire & Rubber Co., Ltd. (72) Inventor Hitoshi Kondo 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F term (reference) 3D054 AA03 AA14 BB10 BB30 DD13 FF17

Claims (4)

[Claims] 1. A structure in which a corrugated tube through which a wire harness as a wiring component to an airbag device is passed inside is held on an outer wall surface of an airbag case, wherein the corrugated tube is attached to an outer wall surface of the airbag case. A holding member for holding so as to be sandwiched is attached, the holding member includes a holding portion for holding a side surface of the corrugated tube, and a guide portion for guiding the corrugated tube to the holding portion, and the corrugated member guided by the guide portion. A structure for holding a corrugated tube in an airbag device, wherein a gap for inserting a tube into the holding portion is set smaller than an outer diameter of the corrugated tube. 2. The fixing device according to claim 1, wherein said holding member is provided integrally with a fixing member attached to an outer wall surface of said airbag case to fix said airbag case to a vehicle structure. The holding structure as described. 3. The holding portion is formed by a holding piece for holding the corrugated tube between the holding portion and an outer wall surface of the airbag case, and the guide portion is provided at a tip of the holding piece, and the guide portion is provided. 2. The holding structure according to claim 1, wherein the tip is formed so as to be farther away from the outer wall surface of the case. 4. The holding portion is formed by a receiving portion on an airbag case side for receiving a side surface of the corrugated tube, and a holding piece for holding the corrugated tube between the receiving portion and the receiving portion. A locking protrusion for locking the corrugated tube, the gap for inserting the corrugated tube between the locking protrusion and the holding piece is formed, and the guide is provided at a tip of the holding piece. The guide portion extends beyond the locking protrusion, and a gap between a tip portion thereof and an outer wall surface of the airbag case is set to be larger than an outer diameter of the corrugated tube. The holding structure according to claim 1, wherein