CN201143921Y

CN201143921Y - Cover plate for safety air bag

Info

Publication number: CN201143921Y
Application number: CNU200720194481XU
Authority: CN
Inventors: 李跃; 成国华; 汪栋
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2007-12-12
Filing date: 2007-12-12
Publication date: 2008-11-05
Anticipated expiration: 2017-12-12

Abstract

A safety airbag cover plate includes a plate (1), wherein, one side of the plate (1) which faces an inflatable bag of the safety airbag is provided with a thickness reduction groove (2). The safety airbag cover plate of the utility model has the advantages of simple structure and convenient manufacturing. Because the side of the plate which faces the inflatable bag is provided with the thickness reduction groove, when the inflatable bag expands, the cover plate is torn up from the thickness reduction groove under the expansion force of the inflatable bag, to allow the inflatable bag to quickly expand and explode. In addition, because the safety airbag cover plate and an airbag installation structure can be integrated by injection moulding, the connection between the cover plate and the airbag installation structure can be realized without extra parts or procedures, so as to save the production cost.

Description

A kind of airbag cover

Technical field

The utility model relates to a kind of vehicle component, more particularly, relates to the airbag cover of using in a kind of vehicle.

Background technology

At present, along with the development of auto manufacturing, safety air bag becomes one of standard configuration of vehicle gradually.Safety air bag is arranged on the inside of bearing circle or instrument carrier panel usually.Under normal condition, folding air bag is covered with by airbag cover, and when vehicle took place to collide, air bag was washed airbag cover and expand open rapidly and pops, thereby provides safety guard-safeguard for chaufeur and passenger.

Existing airbag cover generally is to be connected with the air bag mounting structure by rotating connector, under normal condition, to cover folding air bag, and when vehicle takes place to collide, open around the hinge rotation of attaching parts by making cover plate, pop thereby allow air bag to expand.But the defective of this airbag cover is complex structure, and the cost height needs extra parts to realize and being connected of air bag mounting structure.

The utility model content

The purpose of this utility model is at the baroque shortcoming of existing airbag cover, provide a kind of simple in structure, make easy airbag cover.

The airbag cover that the utility model provides comprises plate main body 1, and wherein, facing on the one side of airbag inflated bag of described plate main body 1 is formed with reducing thin groove 2.

That the advantage of the airbag cover that the utility model provides is is simple in structure, it is easy to make.By the plate main body in the face of reducing thin groove being set on the one side of air bag, thereby can when air bag expands, described cover plate be torn under the effect of air bag swelling force from reducing thin groove, pop thereby allow described air bag to expand rapidly.In addition, because described airbag cover and air bag mounting structure can be one by injection mo(u)lding, therefore need not to utilize again extra parts or realize being connected between this cover plate and the air bag mounting structure, so saved productive costs by extra operation.

Description of drawings

The perspective view of the airbag cover that Fig. 1 provides for the utility model;

The plan sketch of the airbag cover that Fig. 2 provides for the utility model;

The structural representation of the another kind of embodiment of the reducing thin groove on the airbag cover that Fig. 3 provides for the utility model;

The structural representation of the another kind of embodiment of the reducing thin groove on the airbag cover that Fig. 4 provides for the utility model;

Fig. 5 is the generalized section along Fig. 2 center line A-A intercepting;

Fig. 6 is the generalized section along Fig. 2 center line B-B intercepting;

Fig. 7 is the generalized section along Fig. 2 center line C-C intercepting.

The specific embodiment

Below, in conjunction with the accompanying drawings, the utility model is elaborated.

The airbag cover that the utility model provides comprises plate main body 1, and described plate main body 1 in the face of being formed with reducing thin groove 2 on the one side of airbag inflated bag, as depicted in figs. 1 and 2.

Wherein, described plate main body 1 can be an one by injection mo(u)lding with the air bag mounting structure 3 that is used to install the airbag inflated bag, need not to utilize extra parts (as rotating connector) like this or by extra operation (as bonding, welding etc.), can realize being connected between airbag cover and the air bag mounting structure 3, therefore save productive costs.And, described reducing thin groove 2 can be formed on the one side in the face of the airbag inflated bag of plate main body 1 by well known to a person skilled in the art variety of way, promptly be provided with on the one side of air bag mounting structure 3, as utilize chemical solvent, laser beam cutting or the like, under the preferable case, described reducing thin groove 2 utilizes mold injection molding together when injection molding plates main body 1, has therefore reduced Fabrication procedure, save productive costs, improved production efficiency.The position that described reducing thin groove 2 forms can determine according to the position at airbag inflated bag place, to be positioned at directly over it.

Described reducing thin groove 2 comprises grow crosswise a groove 21 and an opposite side groove 22 that lays respectively at these groove 21 two ends of growing crosswise.Wherein, the described groove 21 of growing crosswise can be preferably linear pattern for linear pattern, broken line type or shaped form.Described limit groove 22 can be linear pattern, broken line type or shaped form.And the described groove 21 of growing crosswise can be connected with middle part, end or any position of described limit groove 22.

For example, as shown in Figure 2, be linear pattern at the groove 21 of growing crosswise, limit groove 22 also is a linear pattern, and under grow crosswise groove 21 and the situation that the middle part of limit groove 22 is connected, described reducing thin groove 2 is the H type.And being linear pattern at the groove 21 of growing crosswise, limit groove 22 also is a linear pattern, and under grow crosswise groove 21 and the situation that the end of limit groove 22 is connected, described reducing thin groove 2 is the shape shown in Fig. 3.And for example, be linear pattern at the groove 21 of growing crosswise, limit groove 22 is a broken line type, and under grow crosswise groove 21 and the situation that the middle part of limit groove 22 is connected, described reducing thin groove 2 is the shape shown in Fig. 4.

Below, only the reducing thin groove with shape shown in Figure 2 is that example describes, situation shown in Fig. 3 and Fig. 4 and but analogous shape that those skilled in the art can expect not shown at this are therewith in like manner.

The described groove 21 of growing crosswise can have the degree of depth of uniformity or can have the degree of depth of variation, promptly has variable section structure.Under the preferable case, the described groove 21 of growing crosswise has the variable section structure of middle part (being a section shown in Fig. 2) degree of depth greater than two ends (being the b section shown in Fig. 2) degree of depth.Like this, not only can avoid problems such as surface shrink and irregular colour in injection molding process, occurring, improve surface quality of products, therefore need not to carry out again operations such as secondary sprays paint, thereby improved production efficiency.And, when the airbag inflated bag is triggered and is expanded, described cover plate is under the effect of air bag swelling force, can be at first from the degree of depth innermost of the groove 21 of growing crosswise, be that the most weak a section of intensity realizes tearing at an easy rate, again with the more shallow place of the degree of depth, promptly related the tearing apart of b section at two ends pops thereby allow described air bag to expand rapidly subsequently.

Generally, the ratio of the middle part of the described groove 21 of growing crosswise and the degree of depth at two ends, promptly the ratio of a section and the degree of depth of b section can be 1.1-1.8 among Fig. 2.For example, when the monolith of plate main body 1 is thick when being approximately 3.5mm, the material at a section place of the described groove 21 of growing crosswise is thick can be approximately 0.7mm, can be approximately 1.5mm and the material at b section place is thick.Fig. 5 and Fig. 6 have expressed the cross sectional shape at a section place and the b section place of the groove 21 of growing crosswise respectively, can be by contrasting the depth difference of schematically finding out between two places.

In addition, generally, the overall length of the described groove 21 of growing crosswise need be determined according to the size dimension of airbag aeration bag, for example can be about 200-300mm.The described groove 21 of growing crosswise, the degree of depth is approximately 15-30mm greater than the length at the described middle part (being a section shown in Fig. 2) at two ends.And the length overall of the length at described middle part and the described groove 21 of growing crosswise is irrelevant, groove 21 length overalls of no matter growing crosswise how much, the length at the middle part that the described degree of depth is darker is all roughly in the scope of 15-30mm, to guarantee only have the most weak part of a bit of intensity to get final product on the whole groove of growing crosswise.

Expressed the cross sectional shape of limit groove 22 among Fig. 7, described limit groove 22 also can have the degree of depth of uniformity or the degree of depth of variation, under the preferable case, the degree of depth of limit groove 22 is a uniformity, and can be basically identical with the degree of depth of the more shallow b section of the degree of depth of the groove 21 of growing crosswise.Like this, when the airbag inflated bag is triggered and is expanded, described cover plate will be at first under the effect of air bag swelling force, from the degree of depth innermost of the groove 21 of growing crosswise, promptly the most weak a section of intensity realizes tearing at an easy rate, subsequently again with the more shallow place of the degree of depth, be related the tearing apart of b section at two ends, tear along limit groove 22 more afterwards and come, promptly be similar to the tear portion that makes cover plate in Fig. 2 turn-line 4 or the long and short dash line among Fig. 3 or Fig. 4 turn down, pop thereby allow air bag therefrom to expand rapidly.

Claims

1. airbag cover, described cover plate comprises plate main body (1), it is characterized in that, described plate main body (1) be formed with reducing thin groove (2) in the face of on the one side of airbag inflated bag.

2. airbag cover according to claim 1 is characterized in that, described reducing thin groove (2) comprises the groove of growing crosswise (21) and lays respectively at an opposite side groove (22) at these groove of growing crosswise (21) two ends.

3. airbag cover according to claim 2 is characterized in that, described limit groove (22) is linear pattern, broken line type or shaped form.

4. according to claim 2 or 3 described airbag cover, it is characterized in that the described groove of growing crosswise (21) is communicated with the middle part or the end of described limit groove (22).

5. airbag cover according to claim 2 is characterized in that, the described groove of growing crosswise (21) has the variable section structure of the middle part degree of depth greater than the two ends degree of depth.

6. airbag cover according to claim 5 is characterized in that, the middle part of the described groove of growing crosswise (21) is 1.1-1.8 with the ratio of the degree of depth at two ends.

7. according to claim 5 or 6 described airbag cover, it is characterized in that, the described groove of growing crosswise (21), the degree of depth is 15-30mm greater than the length at the described middle part at two ends.

8. airbag cover according to claim 7 is characterized in that, the overall length of the described groove of growing crosswise (21) is 200-300mm.