Air bag lid

An airbag and cover technology, which is applied in vehicle safety arrangement, pedestrian/passenger safety arrangement, transportation and packaging, etc., can solve problems such as fracture extension to undesired areas and fracture dispersion, so as to avoid unnecessary diffusion and restrain The effect of deformation expansion

Active Publication Date: 2007-07-25
TOYODA GOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the process of forming the T-shaped intersection portion by forming the prefabricated breaking portion of the conventional airbag cover by the cutting operation, when the cross section is formed by the cutting operation with respect to one of the straight sections, there is a risk that the cutting of the processing tool The blade moves over the area where the corresponding straight break is located, thereby making cuts in the airbag cover at undesired locations
A cut in the airbag cover that accidentally extends to an unintended area may lead to a risk that when the prefabricated break is broken, the transverse part breaks over the straight line, so that the break extends to an undesired area, and may further cause The risk is that parts of the airbag cover that don't have to break end up breaking apart

Method used

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Experimental program
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Effect test

no. 1 approach

[0093] A first embodiment of the present invention will be described below. In the first embodiment, as shown in FIGS. 3 to 5 , the protrusion opening portion 12 is formed in a rectangular plate shape, and a thin prefabricated breaking portion 16 extending in a linear shape is provided thereon. This prefabricated breaking portion 16 is formed by providing a groove portion 16a which is recessed from the back surface side of the airbag cover 10A to the front surface side, and, in the case of the present embodiment, arranging T-shaped intersections at two places. The portion 20, viewed from the top, is such that the transverse portion 19 intersects the straight portions 17, 18 respectively in a T-shape, whereby the prefabricated rupture portion 16 is formed in an H-shape when viewed from the top. Thus, when the prefabricated breaking part 16 is broken, the two front and rear cover parts 13, 14 (the transverse part 19 is located therebetween) are respectively opened front and rear...

no. 2 approach

[0121] Next, a second embodiment of the present invention will be described with reference to FIGS. 14 to 20 .

[0122] In a second embodiment, as shown in FIG. 14 , the prefabricated break 16 consists of two different types of grooves 16a, 16b. The two straight break portions 17, 18 are formed by the groove 16b which is molded when the airbag cover 10B is injection-molded. The cross section 19 is constituted by the groove 16a, and the molded airbag cover 10B is machined using a cutter 35 to make a notch without generating chips or cutting material to form the groove 16a.

[0123] In the case of the second embodiment, as shown in FIGS. 16A to 16C , the cutter 35 is an ultrasonic cutter whose body portion 36 has a thickness of 0.5 mm to 1.0 mm and includes a single cutting edge 37 . The cutting edge 37 is formed obliquely in such a manner that the cutting edge 37 extends from the tip or tip 37a to the heel or near base 37b side thereof, in the direction in which the knife 35 m...

no. 3 approach

[0140] Although in the second embodiment, the cutting edge accommodating portion 21 is formed in a concave shape having a trapezoidal cross-section as viewed in the transverse direction of the transversal portion 19, the third embodiment shown in FIGS. 21 and 22 Like the airbag cover 10C of the embodiment, it is also possible to employ the cutting blade receiving portion 41 formed in a concave shape having a triangular cross section when viewed in the lateral direction of the transverse portion 19 . As in the case of the first embodiment, in the airbag cover 10C of the third embodiment, not only the transverse portion 19 but also the straight portions 17 , 18 are formed using the cutter 35 or by a cutting operation. That is, except for the cutting edge receiving portion 41, the prefabricated breaking portion 16 is constituted only by the groove 16a made by the cutting operation. In addition, cutting edge receiving portions 41 are provided at both ends of the respective straigh...

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Abstract

The invention provides a gasbag cover for covering the folded gasbag. The cover is mould shaped by synthetic resin, and includes a thin prefabricated fracture section which extends linearly and which will be cracked by being top pressed when the gasbag expands thereby forming an opening for projecting from which the gas bag can projects out. A cutting blade of processing tool is employed to make groove notch on the back surface of the molded cover to form the prefabricated fracture section. A cutting blade housing section is set in a concave manner, at the starting end and the stop end of the cutting processing (making notch on the cover), thereby accepting the cutting blade of the cutting tool.

Description

technical field [0001] The present invention relates to an airbag cover covering a folded airbag, which is made of synthetic resin by molding, and the airbag cover includes a linearly extending thin prefabricated breaking part, which is broken by the top pressure of an inflated airbag , thereby forming an opening for the airbag to protrude through which the airbag can protrude. Background technique [0002] In a conventional airbag made of synthetic resin, a thin prefabricated break is formed around the cover so that when the cover is pressed against by the airbag, the cover can be opened to form an opening for protrusion (for example, see JP-A-2005-289254 and JP-T-2002-538035 (Published Japanese Translation of PCT Patent Application). This prefabricated break is produced by providing grooves on the rear side of the injection-molded airbag cover, in addition, the grooves are processed to form the prefabricated break, in order that the resulting grooves can have increased pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R21/215B29C71/00B60R21/20B60R21/2165
Inventor 浅井真子冈田靖横井隆二伊藤孝幸
Owner TOYODA GOSEI CO LTD
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