JPH0675923U - Cover body for airbag storage - Google Patents

Abstract

(57) [Summary] [Purpose] In an air bag storage cover in which a main tear line for tearing the air bag at the start of operation is continuously provided, even under various circumstances, the end portion of the main tear line, that is, Make sure to prevent tearing of the tear line end and to smoothly tear the airbag storage cover. [Structure] When the airbag operation starts, the tearing of the airbag storage cover 1 starts from the main tear line 2 and proceeds to the main tear lines 3 to 6. Main tear line 3 of this cover 1,
Since sub tear lines 7 to 10 branching from the middle are formed in 4, 5, and 6, the propulsive force and the traveling direction of the cleaving cover 1 are dispersed in at least two directions. The force applied to the tear line ends of 5, 5, 6 is reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cover for accommodating an airbag that operates, expands, and deploys by sensing the impact, deformation, or the like in a vehicle collision.

[0002]

[Prior art]

 Conventionally, as a cover for accommodating an airbag, for example, one described in Japanese Patent Application Laid-Open No. 4-27638 is known.

In the above-mentioned conventional publication, as shown in FIG. 6, an air bag storage cover 101 in which a main tear line for tearing the air bag at the start of an air bag operation is continuously provided from the center along an end portion thereof. At the end portion of the main tear line 102 provided along the end portion of the main tear line 102, a stop hole 103 for preventing propagation of cleavage is provided to prevent the cover 101 from being split at the end of the main tear line 102 when the airbag is deployed. It has been shown to stop and prevent further propagation.

[0004]

[Problems to be solved by the device]

 More specifically, in the above conventional technique, the tearing of the airbag storage cover 101 at the start of the airbag operation starts from the main tear line provided at the center and proceeds to the main tear line provided at the end of the cover. However, when this cleavage reaches the stop hole provided at the end portion of the main tear line along the edge of the cover 101, the propagation of the air bag cleavage is blocked here.

However, when the cover 101 is used under various temperature conditions, a low-priced material is used, or the door portion is thinned, the stop hole 103 prevents the cover 101 from tearing. It is impossible to do so, and the door is adversely affected. Therefore, under various circumstances, there is a problem that only a special expensive material having good characteristics in a wide range from high temperature to low temperature can be used for this cover body.

The present invention has been made in view of the above problems, and in various situations in the airbag storing cover in which the main tear line for tearing the airbag at the start of the airbag operation is continuously provided. Even underneath, it is an issue to surely prevent the tearing of the end portion of the main tear line, that is, the tear line end, and to smoothly tear the airbag storage cover.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the airbag storage cover body of the present invention is an airbag storage cover having a main tear line for tearing at the start of airbag operation and a tear line end that is an end portion of the main tear line. It is characterized in that a sub tear line branching from the main tear line is formed at one or more places at a predetermined portion before the tear line end.

[0008]

[Action]

 When the airbag operation starts, the tearing of the airbag storage cover starts from the main tear line and proceeds along the main tear line. Since the main tear line of this cover has a sub tear line that branches off from the middle of the cover, the propulsive force that causes the cover to split and its traveling direction are dispersed in at least two directions, and at the tear line end of this main tear line. This force is greatly reduced, the tear line end does not tear, and the cover tears smoothly.

[0009]

【Example】

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

Reference numeral 1 denotes an air bag housing cover of an embodiment of the present invention which houses an air bag (not shown), and is formed of a thermoplastic elastomer or urethane resin. Then, the cover 1 is continuously provided with a central tear line 2 as a main tear line for starting the tearing at the start of the airbag operation, and end tear lines 3, 4, 5, 6 as the main tear lines. , Their ends are tear line ends. The end tear lines 3, 4, 5 and 6 extend substantially at right angles to the direction in which the central tear line 2 extends, and the central tear line 2 constitutes a substantially H-shaped thin portion.

As shown in FIG. 2, the sub tear lines 7, 8, 9, and 10 that branch from the middle of the end tear lines 3, 4, 5, and 6 are formed symmetrically. Bent portions 11, 12, 13, 14; 15, 16, 17, 18 are formed at the tip portions of the end tear lines 3, 4, 5, 6 and the sub tear lines 7, 8, 9, 10. Each tear line 2 to 10 is composed of a groove formed on the back surface.

In the air bag storage cover 1 of the present embodiment configured as described above, an inflator (not shown) is actuated by an acceleration sensor (not shown) at the time of sudden deceleration of the vehicle. , Send gas into the airbag. Due to this expansion, when the cover 1 is pressurized from the inside by the air bag, the vicinity of the central portion of the cover 1 becomes the weakest, so that the tearing of the cover 1 starts from the vicinity of the central tear line 2 at A and ends. Proceed along tear lines 3, 4, 5, and 6 (see Figure 3).

At this time, since the sub tear lines 7, 8, 9, 10 branching from the middle of the end tear lines 3, 4, 5, 6 are formed, as shown in FIG. The propulsive force of the -1 breaking and the traveling direction are dispersed in two directions at the branch point B, and the force applied to the end portions of the end tear lines 3, 4, 5, 6 is reduced.

Therefore, even if the airbag storage cover 1 is made of a low-priced material under various temperature conditions, the end portions of the end tear lines 3, 4, 5, 6 which are the main tear lines, that is, The tearing of the tear line end is reliably prevented, and the tearing of the airbag storage cover 1 can proceed smoothly. Furthermore, even if the door is thin, it does not adversely affect the door.

Further, in the airbag storage cover 1 of the present embodiment, the bent portions 11, 1 are formed at the tip portions of the end tear lines 3, 4, 5, 6 and the sub tear lines 7, 8, 9, 10. 2, 13, 14; 15, 16, 17, and 18 are formed, the propulsive force of the cleaving cover 1 and the traveling direction are further dispersed at the bent portions 11 to 18, and the cover for storing the airbag is provided. The cleavage of 1 is carried out more smoothly.

As shown in FIG. 4, in the airbag storage cover 1 of this embodiment, the end tear lines 3, 4, 5 and 6 are provided with sub-tear lines 7 and 8 branched from the middle thereof. , 9, 10 are formed symmetrically, it is easy to bend C on the line connecting the sub-tare lines 7, 8 and 9, 10 and the cover 1 is opened so that it can be bent in D and E2 stages, so the airbag is opened. Airbag deployment will be quicker and easier.

Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and modifications and additions within the scope not departing from the gist of the invention are included in the invention. Be done.

For example, in the embodiment, the sub tear lines 7 to 10 are formed at one position on the end tear lines 3 to 6 which are the main tear lines, but as shown in FIG. 5, two sub tear lines 7 to 10 are formed. , 19 to 22 may be formed.

In the embodiment, the sub tear lines 7 to 10 are formed symmetrically, but they may be laterally asymmetrical.

In the embodiment, the cover 1 is made of thermoplastic elastomer or urethane resin, but may have a multilayer structure or a single layer structure, or may have an insert material.

[0021]

As described above, in the cover body for storing an airbag of the present invention, since the main tear line is formed with one or more sub-tear lines branching from the middle, the cover tears off. The propulsive force and the traveling direction are distributed in at least two directions, and the force applied to the end portion of the main tear line, that is, the tear line end is reduced. Therefore, even under various temperature conditions, even if the cover is manufactured with low-priced material, and even if the door is thin, tearing of the tear line end can be reliably prevented, and the tearing back cover of the air bag is torn open. The effect of being able to carry out smoothly is obtained.

[0022]

[Brief description of drawings]

FIG. 1 is a perspective view of an airbag storage cover according to an embodiment of the present invention.

FIG. 2 is a rear view of the airbag storage cover according to the embodiment of the present invention.

FIG. 3 is a view showing a traveling direction of the tear of the airbag storage cover of the embodiment of the present invention.

FIG. 4 is a view showing the tearing direction of the airbag storage cover of the embodiment of the present invention.

FIG. 5 is a cross-sectional view of an essential part of an airbag storage cover according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main portion showing a tear line end portion of a conventional airbag storage cover.

[Explanation of symbols]

1 Cover for air bag storage 2 Central tear line (main tear line) 3,4,5,6 Edge tear line (main tear line) 7,8,9,10 Sub tear line 19,20,21,22 Sub tear line 11,12,13,14 , 15, 16, 17, 18 Bending part

Claims (1)

[Scope of utility model registration request] 1. An airbag storage cover having a main tear line for cleaving at the start of an airbag operation, and a tear line end which is an end portion of the main tear line, wherein a predetermined portion before the tear line end is provided with the tear line end. A cover body for storing an air bag, characterized in that one or more sub tear lines branching from a main tear line are formed.