CN101537821A - Airbag cover and airbag device - Google Patents

Abstract

In order to provide an airbag cover and an airbag device capable of improving an outer appearance of the airbag cover and simplifying a structure of a hinge portion, the airbag cover (1) is formed by integrally resin molding a plate portion (2) which forms a vehicle interior surface with an inner case (3) to be disposed on the back surface of the plate portion (2) to form an inflation/development path of an airbag (5). The airbag cover (1) includes a door member (2a) formed in the plate portion (2) so as to be split upon inflation/development of the airbag (5), and a hinge portion (4) which turnably retains the door member (2a). The hinge portion (4) includes a first thin portion (4a) formed at a connection portion between the inner case (3) and the plate portion (2), and plural first ribs (4b) disposed on the outer surface of the first thin portion (4a) so as to be bent or buckled upon the inflation/development of the airbag.

Description

Air cell covering and airbag apparatus

Technical field

The present invention relates to a kind of airbag apparatus that constitutes the air cell covering of air bag opening portion and have above-mentioned air cell covering, relate in particular to a kind of air cell covering and airbag apparatus that as instrument carrier panel etc., is configured in the automobile interior face.

Background technology

Generally be equipped with airbag apparatus in the vehicles such as automobile, in emergency circumstances make the air bag expansion of in car, expanding bumping etc., with occupant restraint.Exploitation and adopted following all kinds in the above-mentioned airbag apparatus: in install to driver-seat airbag device in the bearing circle, in install to airbag device for front passenger's seat in the instrument carrier panel, in install to installing side airbag device in vehicle side face or the seat, in install to knee air bag device of instrument carrier panel bottom etc.The formation of these airbag apparatus is, is incorporated in usually in the car construction thing, and the people is discovered less than its existence, waits in collision and in emergency circumstances wears out the car construction thing, air bag is released to Che Nei and expands launch.Therefore, must cover the opening portion of air bag with automobile interior face assimilation ground under normal conditions, launch and air bag is expanded smoothly and promptly.

Above-mentioned airbag apparatus generally has: air bag, be folded usually, and in emergency circumstances expand and launch; Charging blower provides gas to this air bag; Retainer is taken in air bag; Air cell covering constitutes the automobile interior face in the time of this retainer of fastening.Above-mentioned air cell covering is the thin-walled tabular body of resin forming, and the back side forms the groove that is called tear line.This tear line is the slot part that air bag forms than unfertile land in order to be easy to make the air cell covering cracking.And portion is rotatably kept by the hinge that forms on the air cell covering by the formed door of the cracking of air cell covering, forms the opening portion that airbag inflation is launched.

And above-mentioned air cell covering is also gone up the interior case one resin forming (for example with reference to patent documentation 1) that launches path with the expansion that constitutes air bag sometimes overleaf.In the patent documentation 1 described air cell covering, under the thicker situation of the pin sheet portion of interior case, pore (distortion of following contraction to produce during hardening of resin) can appear in the surface of air cell covering when making air cell covering, therefore form the 1st thin thinner wall section of gauge in the outstanding pin sheet portion that is provided with in the back side of different with hinge non-expansion portion, and at its root.

Patent documentation 1: TOHKEMY 2007-290409 communique

But, in patent documentation 1 described air cell covering, have hinge independently with the 1st thinner wall section of pin sheet portion, therefore must make up separately and rotatably keep the hinge of door portion to prevent that it from dispersing, the difficult design of hinge.

Summary of the invention

The present invention produces in view of above problem, and its purpose is to provide a kind of air cell covering and airbag apparatus that improves the exterior quality of air cell covering and can simplify the structure of hinge.

According to the present invention, a kind of air cell covering is provided, be with plate-like portion and the integrated air cell covering of interior case, described plate-like portion constitutes the automobile interior face, case is configured on the back side of described plate-like portion and the expansion that constitutes air bag launches path in described, it is characterized in that described plate-like portion has: door portion, can when described airbag inflation launches, the mode of cracking forming; And hinge, rotatably keeping this one, described hinge has: the 1st thinner wall section is formed in described on case and the connecting portion described plate-like portion; With a plurality of the 1st ribs, be configured on the lateral surface of described the 1st thinner wall section and can be when described airbag inflation launches deflection or buckle.

And, according to the present invention, provide a kind of airbag apparatus, have: air bag is folded usually, and launches urgent the expansion constantly; Charging blower provides gas to this air bag; Retainer is taken in above-mentioned air bag at least; Air cell covering, this retainer of fastening also constitutes the automobile interior face, this airbag apparatus is characterised in that, above-mentioned air cell covering is with plate-like portion and the integrated air cell covering of interior case, above-mentioned plate-like portion constitutes the automobile interior face, case is configured on the back side of this plate-like portion and the expansion that constitutes air bag launches path in above-mentioned, and above-mentioned plate-like portion has: door portion be formed on the described plate-like portion in the mode that can ftracture when described airbag inflation launches; And hinge, rotatably keeping this one, described hinge has: the 1st thinner wall section is formed in described on case and the connecting portion described plate-like portion; With a plurality of the 1st ribs, be configured on the lateral surface of described the 1st thinner wall section and can be when described airbag inflation launches deflection or buckle.

In air cell covering and airbag apparatus that the invention described above relates to, preferably: above-mentioned door portion to be can forming by the mode of the tear line cracking that forms on the above-mentioned plate-like portion, and above-mentioned the 1st thinner wall section forms and the roughly the same thickness of the wall thickness of this tear line or the following thickness of wall thickness of this tear line.And above-mentioned the 1st rib can form thicklyer than above-mentioned the 1st thinner wall section, can dispose continuously with 3 to 15mm spacing, also can have the adjustment part that can be adjusted at deflection that produces when above-mentioned airbag inflation launches or the degree of buckling.Further, above-mentioned plate-like portion can have a plurality of strengthening ribs overleaf, and this strengthening rib forms thickness or its above thickness roughly the same with above-mentioned the 1st rib.For example, the thickness setting of above-mentioned the 1st thinner wall section is in 0.5 to 1.0mm scope, and the thickness setting of above-mentioned the 1st rib is in 1.0 to 1.3mm scope, and the thickness setting of above-mentioned strengthening rib is in 1.0 to 1.8mm scope.

In air cell covering and airbag apparatus that the invention described above relates to, above-mentioned the 1st thinner wall section can be formed obliquely in the outside of case in above-mentioned, also can be formed on make above-mentioned on the extension expanded laterally of case.Further, also can on the medial surface of above-mentioned the 1st thinner wall section, form the 2nd little rib of above-mentioned the 1st thinner wall section of intensity ratio.For example the 2nd rib is compared with above-mentioned the 1st rib, and volume forms lessly, or wall thickness forms thinlyyer, or number forms lessly.

And, the 1st joint portion that is made of above-mentioned the 1st thinner wall section and above-mentioned extension can form to such an extent that the connecting portion of above-mentioned the 1st thinner wall section and above-mentioned plate-like portion is thick than being connected, by above-mentioned extension and above-mentioned in the 2nd joint portion that constitutes of the foot of case can form thicklyer than above-mentioned the 1st joint portion, the rigidity of above-mentioned the 2nd joint portion is greater than above-mentioned foot.And above-mentioned extension can have the rigidity low rigid portion lower than other parts near the both ends of the direction of above-mentioned hinge, and above-mentioned plate-like portion can have near the tear line that is formed on the above-mentioned low rigid portion.

In air cell covering and airbag apparatus that the invention described above relates to, preferred: part on case and the connecting portion above-mentioned plate-like portion, that do not constitute above-mentioned hinge in above-mentioned forms the 2nd thinner wall section.And preferred, above-mentioned door portion to be can forming by the mode of the tear line cracking that forms on the above-mentioned plate-like portion, and above-mentioned the 2nd thinner wall section forms the thickness below the wall thickness with the roughly the same thickness of the wall thickness of this tear line or this tear line.

The air cell covering and the airbag apparatus that relate to according to the invention described above, by on the connecting portion of plate-like portion and interior case, forming the 1st thinner wall section, can suppress connecting portion follow hardening of resin the time the distortion that contraction produced, can prevent to produce pore on air cell covering surface, improved the exterior quality of air cell covering.And, in the present invention, utilize the 1st thinner wall section to dispose the 1st rib with the formation hinge, thereby need not on plate-like portion, to form the thinner wall section that constitutes hinge at its lateral surface, the structure of hinge is simplified.And, make the 1st rib deflection or formation with buckling, thereby can absorb the impact that produces when a portion rotates, when keeping the expansion performance of air bag, suppressed dispersing of door portion.

And, the 1st thinner wall section is formed and the roughly the same thickness of the wall thickness of tear line or the following thickness of wall thickness of tear line, can effectively suppress air holes.And, can effectively strengthen the 1st thinner wall section by making the 1st rib form thicklyer than the 1st thinner wall section.And, by dispose the 1st rib with prescribed distance, can be easy to adjust intensity, when strengthening the 1st thinner wall section, deflection or the impact of buckling and producing when effectively absorbing the rotation of door portion.Further,, can on whole of plate-like portion surface, effectively suppress air holes, improve the exterior quality of air cell covering by making roughly the same thickness of strengthening rib formation and the 1st rib or the thickness more than it.Especially with the thickness setting of the 1st thinner wall section in 0.5 to 1.0mm scope, the thickness setting of the 1st rib is in 1.0 to 1.3mm scope, effective when the thickness setting of strengthening rib is in 1.0 to 1.8mm scope.And, by on the 1st rib, forming the adjustment part, the degree that can adjust deflection or buckle according to the required rigidity of hinge, verticity.

And, be formed obliquely by making the inside case of the 1st thinner wall section outside, can be easy to revolving door portion, improved the expansion performance of air bag.Further, be formed on the extension of interior case, the fulcrum of hinge is separated with the expansion expansion path of air bag, be easier to revolving door portion, improved the expansion performance of air bag by making the 1st thinner wall section.

And, form thicklyer by making the 1st joint portion than connecting portion, when the resin forming of interior case, be easy to inject resin, be easy to be shaped to required interior case, the pore when having suppressed hardening of resin effectively.Further, form thicklyer, can when the resin forming of interior case, inject resin more efficiently than the 1st joint portion by making the 2nd joint portion.And the rigidity by making the 2nd joint portion can improve the rigidity of hinge greater than foot, when suppressing airbag inflation and launching in the distortion of case, and suppress the strain of the S. A. of hinge.And, by on extension, forming low rigid portion, can suppress the strain of the S. A. of hinge, a portion is rotated smoothly.Further,, can make the cracking direction of plate-like portion stable, a portion is rotated smoothly by near formation tear line low rigid portion.

And, form the 2nd rib by medial surface in the 1st thinner wall section, follow the rotation of a portion to be stretched, the impact that produces in the time of can effectively absorbing the rotation of portion suppresses dispersing of door portion when keeping the expansion performance of air bag.By making the 2nd rib intensity, a portion is rotated smoothly less than the 1st rib.

And by forming the 2nd thinner wall section on the connecting portion of interior case and plate-like portion, the pore that the connecting portion of case and plate-like portion produces on the whole in can suppressing has improved the exterior quality of air cell covering.And the thickness by below the wall thickness that makes roughly the same thickness of the formation of the 2nd thinner wall section and the wall thickness of tear line or tear line can effectively suppress the generation of pore.

Description of drawings

Fig. 1 is the figure of the 1st embodiment of the air cell covering that the present invention relates to of expression, (A) is section-drawing, (B) is the B portion enlarged drawing among Fig. 1 (A), (C) is the C portion enlarged drawing among Fig. 1 (A).

Fig. 2 is the figure of the 1st embodiment of the air cell covering that the present invention relates to of expression, (A) is back view, (B) is the B-B section-drawing among Fig. 2 (A).

Fig. 3 is the figure of the process of expression airbag inflation expansion, (A) emits preceding state in the expression car, the state after (B) emitting in the expression car.

Fig. 4 is the figure of the 2nd embodiment of the air cell covering that the present invention relates to of expression, before (A) the expression airbag inflation launches, after (B) the expression airbag inflation launches.

Fig. 5 is the section-drawing of other embodiments of the air cell covering that the present invention relates to of expression, (A) expression the 3rd embodiment, (B) expression the 4th embodiment, (C) expression the 5th embodiment.

Fig. 6 is the section-drawing of other embodiments of the air cell covering that the present invention relates to of expression, (A) expression the 6th embodiment, (B) expression the 7th embodiment, (C) expression the 8th embodiment.

Fig. 7 is the figure of the variation of expression the 1st rib, (A) expression the 1st variation, (B) expression the 2nd variation, (C) expression the 3rd variation, (D) expression the 4th variation.

Fig. 8 is the figure of the variation of expression hinge, (A) expression the 1st variation, (B) expression the 2nd variation, (C) expression the 3rd variation, (D) expression the 4th variation.

Fig. 9 is the figure of the 5th variation of expression hinge, and (A) expression is a back view, (B) is the B-B section-drawing among Fig. 9 (A).

Figure 10 is the section-drawing of the airbag apparatus that the present invention relates to of expression.

The specific embodiment

Below referring to figs. 1 through Figure 10 embodiments of the present invention are described.Wherein, Fig. 1 is the figure of the 1st embodiment of the air cell covering that the present invention relates to of expression, (A) is section-drawing, (B) is the B portion enlarged drawing among Fig. 1 (A), (C) is the C portion enlarged drawing among Fig. 1 (A).And Fig. 2 is the figure of the 1st embodiment of the air cell covering that the present invention relates to of expression, (A) is back view, (B) is the B-B section-drawing among Fig. 2 (A).In addition, the section-drawing shown in Fig. 1 (A) is the A-A section-drawing among Fig. 2 (A).

The air cell covering 1 of Figure 1 and Figure 2 is the air cell covering 1 with plate-like portion 2 and interior case 3 one resin formings, above-mentioned plate-like portion 2 constitutes the automobile interior face, case 3 is configured on the back side of plate-like portion 2 in above-mentioned, and the expansion that constitutes air bag launches path, have on plate-like portion 2: the 2a of door portion forms in the mode that can ftracture when airbag inflation launches; With hinge 4, rotatably keep the door 2a of portion, hinge 4 has: the 1st thinner wall section 4a is formed on interior case 3 and connecting portion plate-like portion 2; A plurality of the 1st rib 4b are configured in the lateral surface of the 1st thinner wall section 4a, and can be when airbag inflation launches deflection or buckle.

Above-mentioned plate-like portion 2 for example is the parts that constitute the part of vehicle interior trim faces such as instrument carrier panel.Shown in Fig. 2 (A), case 3 in the back side of plate-like portion 2 uprightly is provided with in being equivalent to this in plate-like portion 2 of the inboard of case 3, forms the tear line 2b that roughly H word shape, part thin-walled form (wall thickness dt).Tear line 2b can also can pass through formation such as machine up, laser beam machining, ultrasonic machining with air cell covering 1 mould molding after air cell covering 1 moulding.By forming this tear line 2b, plate-like portion 2 can, launch thereby air bag can be released to Che Nei and make it to expand turning up the soil rotation along tear line 2b cracking when airbag inflation launches.Constitute the door 2a of portion along this tear line 2b cracked parts.

And, shown in Fig. 2 (A), on the back side of plate-like portion 2, show the 1st strengthening rib 2c that the reticulation configuration is used to strengthen plate-like portion 2 greatly.The 1st strengthening rib 2c suitably disposes by shape, the size of plate-like portion 2, is not limited to shape shown.The height of the 1st strengthening rib 2c for example is about 2 to 3mm.And the wall thickness ds1 of the 1st strengthening rib 2c and following the 1st rib 4b form roughly the samely.Particularly, the ds1 of the wall thickness of the 1st strengthening rib 2c is preferably set in 1.0 to 1.3mm the scope.By making the 1st strengthening rib 2c thinner than existing strengthening rib (thickness about 1.3 to 1.8mm), can suppress air holes, improve the exterior quality of air cell covering 1.And, because and the relation between the height of the 1st strengthening rib 2c etc., wall thickness ds1 is being set to such an extent that under the thick situation that also can not produce the pore problem, can be set at the thickness identical with existing strengthening rib than 1.3mm.And, in the 3a of foot of the interior case 3 that disposes along tear line 2b, dispose a plurality of the 2nd strengthening rib 2d that are used to strengthen interior case 3.Shown in Fig. 2 (B), the 2nd strengthening rib 2d is the back side and the 3a of the foot bonded assembly general triangular with plate-like portion 2.The 2nd strengthening rib 2d is the reinforcement rib same with the 1st strengthening rib 2c, so its wall thickness ds2 sets equally with the wall thickness ds1 of the 1st strengthening rib 2c.But the 2nd strengthening rib 2d form than the 1st strengthening rib 2c high situation more, the thickness (for example in 1.0 to 1.3mm the scope) that therefore preferably sets roughly the samely with following the 1st rib 4b.

And, shown in Fig. 1 (A) and Fig. 2 (A), plate-like portion 2 has: be formed on the 2e of frame portion of periphery and uprightly be arranged on the pin 2f of location on the back side, that carry out plate-like portion 2, pin 2f is installed in the fixed orifice of car construction thing one side formation, installs by the peristome that the 2e of frame portion is embedded into car construction thing one side.In Fig. 2 (A), illustrate plate-like portion 2 and be the situation of rectangle, but be not limited to above-mentioned shape.And the surface of plate-like portion 2 is more by the situation that table dress parts such as resinous coat, leather cover.

Shown in Fig. 1 (A) and Fig. 2 (A), above-mentioned interior case 3 is made of the barrel-contoured 3a of foot on the back side that uprightly is arranged on above-mentioned plate-like portion 2 with rectangle.Plate-like portion 2 is installed on the car construction thing in the mode of surface towards occupant's one side, and air bag is towards occupant's expansion of expanding, and therefore shown in Fig. 1 (A), the situation that interior case 3 relative plate-like portions 2 dispose obliquely is more.And air cell covering 1 of the present invention is the device of above-mentioned interior case 3 and plate-like portion 2 one resin formings.Particularly, with resin be injected into make it sclerosis in the mould after, by removing the air cell covering 1 that mould obtains required form.In the air cell covering 1 of this form, in the connecting portion of the 3a of foot of plate-like portion 2 and interior case 3, resin layer thickness significantly changes, therefore the amount of contraction during hardening of resin is bigger, on the surface of plate-like portion 2, produce the depression that is called pore along the shape of the 3a of foot, diminish the exterior quality of air cell covering 1.In order to suppress this air holes, it is suppressed to the degree that human eye can not noticed depression, the connecting portion of the 3a of foot of plate-like portion 2 and interior case 3 is approached as far as possible.On the other hand, when this connecting portion is thin, there is the problem that is easy to rupture.For example, in the patent documentation 1 described invention, avoid the problems referred to above by connecting portion being formed on the part (outside of hinge) that is not subjected to airbag inflation to launch to influence.Relative with it, in the present invention, the connecting portion of the 3a of foot of plate-like portion 2 and interior case 3 is approached as far as possible, yielding part (i.e. the 1st thinner wall section 4a) is used as hinge 4 energetically.

Above-mentioned hinge 4 is as the lower part: make a 2a of portion to the sideway swivel of the surface of plate-like portion 2, form along the opening portion of the shape of interior case 3, air bag successfully is released in the car.This hinge 4 is parts that the expansion performance to air bag exerts an influence, when airbag inflation launches, and must the fast rotational door 2a of portion.On the other hand, disperse, need hold it in the plate-like portion 2 in order to prevent a 2a of portion.That is, hinge 4 must be the structure flexible, that deformability is strong.

Shown in Fig. 1 (B), the hinge 4 in the B portion of Fig. 1 (A) has: the 1st thinner wall section 4a, and the 3a of foot and the plate-like portion 2 of case 3 in connecting, and form thinlyyer than foot 3a and plate-like portion 2; With the 1st rib 4b, be configured on the lateral surface of the 1st thinner wall section 4a.The wall thickness d of the 1st thinner wall section 4a forms roughly the same or its following thickness with the wall thickness dt of tear line 2b.Particularly, the wall thickness d of the 1st thinner wall section 4a preferably sets in 0.5 to 1.0mm scope.Make the 1st thinner wall section 4a so thin, can suppress air holes, be suppressed to human eye and note, and improve the exterior quality of air cell covering 1 less than the degree that caves in.And, being easy to rotation in order to make a 2a of portion, the outside of the inside case 3 of the 1st thinner wall section 4a is formed obliquely.And the height h of the 1st thinner wall section 4a for example is set at about 0 to 10mm, preferred about 3 to 5mm.

And shown in Fig. 1 (B), the 1st rib 4b forms the back side, the 1st thinner wall section 4a and the roughly trapezoidal shape of the 3a of foot bonded assembly with plate-like portion 2.The 1st rib 4b is parts of strengthening the 1st thinner wall section 4a, and for a 2a of portion is rotated smoothly, must be the deflection or the parts of buckling.On the other hand, the 1st rib 4b also is connected with the back side of plate-like portion 2, therefore must make wall thickness dr thinner, reaches the degree that can not produce pore on the surface of plate-like portion 2.Therefore, the wall thickness dr of the 1st rib 4b forms thicklyer, thinner than existing strengthening rib than the wall thickness d of the 1st thinner wall section 4a.Particularly, the wall thickness dr of the 1st rib 4b preferably sets in 1.0 to 1.3mm scope.And the intensity of the 1st rib 4b can be by the number adjustment, and for example, the spacing with 3 to 15mm disposes continuously.Especially more effective with 4 to 10mm spacing configuration.Above-mentioned the 1st rib 4b is configured on the lateral surface of the 1st thinner wall section 4a, can be when strengthening the 1st thinner wall section, carry out deflection or buckle, the impact of generation during with the rotation of effective absorption door portion.In the time of can fully adjusting the intensity of the 1st rib 4b by number (spacing), also can make the wall thickness dr of the 1st rib 4b form roughly the samely with the wall thickness d of the 1st thinner wall section 4a.

And, shown in Fig. 1 (C), on the extension 3b that case 3 was expanded laterally in the 1st thinner wall section 4a also can be formed on and make.Shown in Fig. 2 (A), extension 3b is expansion laterally in the Zone Full of hinge 4.Therefore,, the pivot point of the 2a of portion is staggered laterally with distance r from the lateral surface of interior case 3, make a 2a of portion be easy to rotation by on the 3a of foot of interior case 3, forming extension 3b.Therefore, shown in Fig. 1 (A), extension 3b is formed on and can makes a 2a of portion get final product smoothly (for example being formed on the hinge 4 near the lower position of the air bag of occupant's side or expansion) on the hinge 4 of rotation.And shown in Fig. 1 (C), the 1st flank 4b can form and the back side, the 1st thinner wall section 4a and the extension 3b bonded assembly of plate-like portion 2 square shape roughly.The conditions such as crooked difficulty of the hinge 4 that the deviation of the S. A. of the stress concentration, tear line 2b and the hinge 4 that produce when expand launching apart from r of extension 3b causes are set, for example be set in the scope about 0 to 15mm, preferably set the scope about 3 to 10mm.And the setting angle θ of the 1st thinner wall section 4a and plate-like portion 2 is set at 70 to 110 ° scope, preferred about 90 °.

The connecting portion of plate-like portion 2 and interior case 3 also is present in the part that does not constitute hinge 4, i.e. the part of the 3a of foot that strengthens along tear line 2b configuration and by the 2nd strengthening rib 2d.Therefore, shown in Fig. 2 (B), also can on this connecting portion, form by with the 2nd thinner wall section 3c of the roughly the same condition enactment of the 1st thinner wall section 4a.The 2nd thinner wall section 3c does not constitute hinge 4, therefore need not to consider the rotation difficulty of a 2a of portion, forms towards plate-like portion 2 ground as the crow flies from the 3a of foot to get final product.In Fig. 2 (B), form the 2nd thinner wall section 3c along the medial surface of interior case 3, but also can form along the lateral surface of interior case 3, also can form at the pars intermedia of the 3a of foot.

The effect of above-mentioned air cell covering 1 then is described.Wherein, Fig. 3 is the figure of the process of expression airbag inflation expansion, the state before (A) expression is emitted in car, the state after (B) expression is emitted in car.And to the component parts mark identical mark identical with the air cell covering 1 of Figure 1 and Figure 2, and the repetitive description thereof will be omitted.

Shown in Fig. 3 (A), air cell covering 1 is installed on the car construction thing, and the surface that makes plate-like portion 2 is towards occupant's one side, and makes the hinge 4 that has formed extension 3b be in a side near the occupant (being in the position of below of the air bag 5 of expansion).And, at vehicle collision etc. in emergency circumstances, providing gas to air bag 5 from charging blower (not shown), air bag 5 begins to expand in interior case 3, contacts with the 2a of door portion of plate-like portion 2.And the extruded door 2a of portion is along the tear line 2b cracking that forms than unfertile land by the expansion of air bag 5, and shown in Fig. 3 (B), the 2a of door portion is that fulcrum rotates up and down respectively and splits with hinge 4.Hinge 4 has the 1st thinner wall section 4a that forms than unfertile land, so plate-like portion 2 is the center distortion with the 1st thinner wall section 4a, plays a role as the hinge 4 of the 2a of door portion.

As mentioned above, though the 1st thinner wall section 4a forms identical with tear line 2b or its following thickness d, but strengthen by the 1st rib 4b with wall thickness dr thicker than tear line 2b and the 1st thinner wall section 4a, the stress that therefore can suppress to be produced by the 2a of door portion rotation causes the 1st thinner wall section 4a fracture.In order effectively to suppress the fracture of the 1st thinner wall section 4a, expand when launching at air bag 5, can bear the stress that produces in the hinge 4 in order to make the 1st thinner wall section 4a, the wall thickness dr, number (spacing), volume etc. that adjust the 1st rib 4b get final product.

And shown in Fig. 3 (B), when the 2a of door portion was the fulcrum rotation with hinge 4, the plate-like portion 2 of hinge 4 and periphery was out of shape thereupon, and the 1st rib 4b is compressed by plate-like portion the 2, the 1st thinner wall section 4a and the 3a of foot (comprising extension 3b).And the 1st rib 4b follows the distortion of hinge 4 and deflection is gradually finally buckled.Deflection by the 1st rib 4b and buckling can effectively absorb the impact that the centnifugal force by the 2a of door portion produces, and makes a 2a of portion smoothly rotation the time, has suppressed dispersing of the 2a of door portion.And, when the 3a of foot of interior case 3 forms extension 3b, the fulcrum of the 2a of portion is offset laterally, be easy to the 2a of revolving door portion.Therefore, shown in Fig. 3 (B), the hinge 4 bonded assembly door 2a of portion with a side that has formed extension 3b are rotated in advance than the 2a of other.Rotation setting-up time by the 2a of opposite house portion is poor, can make the expansion of air bag 5 launch to have directive property, direction (occupant side direction) the expansion expansion that makes air bag 5 expand and launch to hope effectively.In addition, illustrate hinge 4 at this and be configured in the situation that is configured in windshield one side near occupant's a side and the hinge 4 that do not have an extension 3b with extension 3b.

Other embodiments of the air cell covering 1 that the present invention relates to then are described.Wherein, Fig. 4 is the figure of the 2nd embodiment of the air cell covering that the present invention relates to of expression, before (A) the expression airbag inflation launches, after (B) the expression airbag inflation launches.And to the 1st embodiment identical component parts mark identical mark extremely shown in Figure 3 with Fig. 1, and the repetitive description thereof will be omitted.

The 2nd embodiment shown in Fig. 4 (A) forms than the 2nd low rib 4c of the 1st rib 4b intensity at the medial surface of the 1st thinner wall section 4a.Shown in Fig. 4 (B), the 2nd rib 4c follows the rotation of the 2a of portion to be stretched, and the impact that the plastic deformation by the 2nd rib 4c produces in the time of can effectively absorbing the 2a of a portion rotation when keeping the expansion performance of air bag, has suppressed dispersing of door portion.And the intensity of the 2nd rib 4c can be adjusted by volume, wall thickness or number (spacing), and intensity is set less than the 1st rib 4b.For example, compare, make the volume of the 2nd rib 4c form lessly, or wall thickness forms thinlyyer, or the number (promptly enlarging spacing) that makes the number of the 2nd rib 4c be less than the 1st rib 4b gets final product with the 1st rib 4b.By setting the intensity of the 2nd rib 4c lower, when a 2a of portion is rotated smoothly, effectively absorb and impact than the 1st rib 4b.And, shown in Fig. 4 (A), the 2nd rib 4c that has formed the part of the 1st thinner wall section 4a among the extension 3b can be roughly " コ " font or roughly vee shape of the back side, the 1st thinner wall section 4a and extension 3b along plate-like portion 2, also can roughly form square as the 1st rib 4b.

Other embodiments of the air cell covering 1 that the present invention relates to then are described.Wherein, Fig. 5 is the section-drawing of other embodiments of the air cell covering that the present invention relates to of expression, (A) expression the 3rd embodiment, (B) expression the 4th embodiment, (C) expression the 5th embodiment.And to the component parts mark identical mark identical with the 1st embodiment of Figure 1 and Figure 2, and the repetitive description thereof will be omitted.

The 3rd embodiment shown in Fig. 5 (A) is, the 1st thinner wall section 4a, the 4a that makes the hinge 4,4 that constitutes both sides forms along the lateral surface of the 3a of foot, the 3a of interior case 3 respectively, disposes leg-of-mutton the 1st rib 4b, 4b at its back side.Above-mentioned the 3rd embodiment not only has the effect same with the 1st embodiment, and makes air bag effective when the working direction of the expansion expansion path of the air bag that is made of interior case 3 is given prominence in hope.In addition, preferably on other connecting portions of plate-like portion 2 that does not constitute hinge 4,4 and interior case 3, form the 2nd thinner wall section 3c and the 2nd strengthening rib 2d.

The 4th embodiment shown in Fig. 5 (B) is, makes on the 1st thinner wall section 4a, the 4a extension 3b that case 3 is expanded laterally during making respectively of the hinge 4,4 that constitutes both sides to form, and disposes roughly tetragonal the 1st rib 4b, 4b on its lateral surface.Above-mentioned the 4th embodiment not only has the effect same with the 1st embodiment, and effective when airbag inflation capacious is launched or when making airbag inflation be expanded to the near surface of plate-like portion 2.In addition, preferably on other connecting portions of plate-like portion 2 that does not constitute hinge 4,4 and interior case 3, form the 2nd thinner wall section 3c and the 2nd strengthening rib 2d.

In the 5th embodiment shown in Fig. 5 (C), generally perpendicularly be connected interior case 3 with plate-like portion 2.Also can play the effect the same by above-mentioned the 5th embodiment with the 1st embodiment.In addition, preferably on other connecting portions of plate-like portion 2 that does not constitute hinge 4,4 and interior case 3, form the 2nd thinner wall section 3c and the 2nd strengthening rib 2d.

Other enforcement examinations of the air cell covering 1 that the present invention relates to then are described.Wherein, Fig. 6 is the section-drawing of other embodiments of the air cell covering that the present invention relates to of expression, (A) expression the 6th embodiment, (B) expression the 7th embodiment, (C) expression the 8th embodiment.And to the component parts mark identical mark identical with the 1st embodiment of Figure 1 and Figure 2, and the repetitive description thereof will be omitted.

In the 6th to the 8th embodiment shown in Fig. 6 (A) to (C), a 2a of portion is constituted in the one-sided mode of opening.The back side at the plate-like portion 2 that is surrounded by interior case 3 forms the roughly tear line 2b of " コ " word shape.On the connecting portion of plate-like portion 2 that constitutes hinge 4 and interior case 3, form the 1st thinner wall section 4a and the 1st rib 4b.And the plate-like portion 2 relative with hinge 4 and the connecting portion of interior case 3 do not constitute hinge 4, therefore are made of the 2nd thinner wall section 3c and the 2nd strengthening rib 2d.In addition, preferably on other connecting portions of plate-like portion 2 that does not constitute hinge 4,4 and interior case 3, form the 2nd thinner wall section 3c and the 2nd strengthening rib 2d.

And the 6th embodiment shown in Fig. 6 (A) is, the 1st thinner wall section 4a that constitutes hinge 4 is formed along the lateral surface of the 3a of foot of interior case 3, disposes leg-of-mutton the 1st rib 4b at its back side.And the 7th embodiment shown in Fig. 6 (B) is the outside of the 3a of foot of the inside case 3 of the 1st thinner wall section 4a that constitutes hinge 4 to be formed obliquely, at the 1st roughly trapezoidal rib 4b of its lateral surface configuration.Further, the 8th embodiment shown in Fig. 6 (C) is, on the extension 3b that case 3 expand laterally in the 1st thinner wall section 4a that constitutes hinge 4 being formed on make, disposes roughly tetragonal the 1st rib 4b at its lateral surface.In any one embodiment, all can play the effect the same with the 1st embodiment.In addition, the 6th to the 8th embodiment illustrates the situation of plate-like portion 2 and interior case 3 basic arranged perpendicular, also can be as the 1st embodiment, and the internal mutually case 3 of plate-like portion 2 disposes obliquely.

The variation of the 1st rib 4b of the air cell covering 1 that the present invention relates to then is described.Wherein, Fig. 7 is the figure of the variation of expression the 1st rib, (A) expression the 1st variation, (B) expression the 2nd variation, (C) expression the 3rd variation, (D) expression the 4th variation.And in each figure, to the component parts mark identical mark identical with the 1st embodiment shown in Fig. 1 etc., and the repetitive description thereof will be omitted.

In the 1st variation of the 1st rib 4b shown in Fig. 7 (A), the 1st rib 4b is connected with the back side and the 1st thinner wall section 4a of plate-like portion 2.And, in the 2nd variation of the 1st rib 4b shown in Fig. 7 (B), the 1st rib 4b is connected with the back side, the 1st thinner wall section 4a, extension 3b and the 3a of foot of plate-like portion 2.And, in the 1st embodiment shown in Fig. 1 (C), the 1st rib 4b is connected with the back side, the 1st thinner wall section 4a and the extension 4b of plate-like portion 2.So, the 1st rib 4b rigidity that can require according to hinge 4, rotatory and conditions such as number, shape, size, thickness are set in suitably distortion.And, but the 1st embodiment of above-mentioned the 1st rib 4b, the 1st variation and the 2nd variation appropriate combination are used.

In the 3rd variation of the 1st rib 4b shown in Fig. 7 (C), on the 1st rib 4b, form notch part 41.And, in the 4th variation of the 1st rib 4b shown in Fig. 7 (D), on the 1st rib 4b, form tear line 42.Above-mentioned notch part 41, tear line 42 constitutes the adjustment part of adjusting deflection that the 1st rib 4b produces or the degree of buckling when airbag inflation launches.By forming above-mentioned adjustment part, according to rigidity, the verticity of hinge 4 requirements, by number, the condition beyond the thickness, the also degree that can adjust deflection or buckle of the 1st rib 4b.In addition, notch part 41, tear line 42 also can be formed on and have on a side bonded assembly the 1st rib 4b of extension 3b.

The variation of the hinge 4 of the air cell covering 1 that the present invention relates to then is described.Wherein, Fig. 8 is the figure of the variation of expression hinge, (A) expression the 1st variation, (B) expression the 2nd variation, (C) expression the 3rd variation, (D) expression the 4th variation.Fig. 9 is the figure of the 5th variation of expression hinge, and (A) expression is a back view, (B) is the B-B section-drawing among Fig. 9 (A).But in Fig. 9 (A), omitted the figure of the plate-like portion 2 of interior case 3.And in each figure, to the component parts mark identical mark identical with the 1st embodiment of the air cell covering shown in Fig. 1 etc., and the repetitive description thereof will be omitted.

In the variation shown in Fig. 8 (A) to (D), the part that connects plate-like portion 2 and the 1st thinner wall section 4a is called connecting portion 43, the part that connects the 1st thinner wall section 4a and extension 3b is called the 1st joint portion 44, the part that connects extension 3b and the 3a of foot is called the 2nd joint portion 45, the wall thickness that makes connecting portion 43 is d1, the wall thickness of the 1st joint portion 44 is d2, and the wall thickness of the 2nd joint portion 45 is d3, and the wall thickness of the 3a of foot is d4.

In the 1st variation of the hinge 4 shown in Fig. 8 (A), added R to the medial surface of the 1st joint portion 44.Consequently, the 1st thinner wall section 4a forms on thickening ground gradually from connecting portion 43 to the 1st joint portions 44, and the wall thickness d2 of the 1st joint portion 44 forms greater than the wall thickness d1 of connecting portion 43.At this moment, if the resin in considering to suppress during the resin forming of case 3 injects, the pore during hardening of resin, can make the wall thickness d1 of connecting portion 43 satisfy the condition of the 1st thinner wall section 4a.Therefore, the 1st thinner wall section 4a for example satisfies the condition of 0.5mm≤d1≤1.0mm and forms.Certainly also can be according to hinge 4 desired rigidity, verticity, satisfy the condition of 0.5mm≤d1＜d2≤1.0mm and form.

In the 2nd variation of the hinge 4 shown in Fig. 8 (B), make the wall thickness thickening ground formation gradually successively of connecting portion the 43, the 1st joint portion the 44, the 2nd joint portion 45.Therefore, the hinge shown in the 2nd variation 4 satisfies the condition of d1＜d2＜d3.In above-mentioned the 2nd variation, the 1st thinner wall section 4a for example satisfies the condition of 0.5mm≤d1≤1.0mm and forms, also can be according to hinge 4 desired rigidity, verticity, and satisfy the condition of 0.5mm≤d1＜d2≤1.0mm and form.So, form than heavy back, can when the resin forming of interior case 3, inject resin more efficiently by making the 2nd joint portion 45 to the 1 joint portions 44.

In the 3rd variation of the hinge 4 shown in Fig. 8 (C), processed fillet at the lateral surface of the 2nd joint portion 45.Consequently, the wall thickness of extension 3b forms on thickening ground gradually from the 1st joint portion 44 to the 2nd joint portions 45.That is, extension 3b satisfies the condition of d2＜d3 and forms.And the 2nd joint portion 45 preferably forms than the 3a of foot heavy back.Particularly, the 2nd joint portion 45 forms, the wall thickness d3＞d4 in the thickest portion.By making the 2nd joint portion 45 form, can improve the rigidity of hinge 4, the distortion of the interior case 3 when suppressing the airbag inflation expansion, and the strain of the S. A. of inhibition hinge 4 greater than the 3a of foot.

In the 4th variation of the hinge 4 shown in Fig. 8 (D), dispose the 3rd rib 46 at the lateral surface of the 2nd joint portion 45.Replacement makes the wall thickness d3 thickening of the 2nd joint portion 45, and by connecting the 3rd rib 46, also can adjust the rigidity of the 2nd joint portion 45, the distortion of the interior case 3 when suppressing the airbag inflation expansion, and the strain of the S. A. of inhibition hinge 4.

In the 5th variation of hinge 4 shown in Figure 9,, form the rigidity low rigid element lower than the part of other extensions 3b near the both ends of the direction of the S. A. of the hinge 4 of extension 3b.As Fig. 9 (A) and (B), above-mentioned low rigid portion for example is made of the slit portion 47 of a part of having excised extension 3b and the 1st thinner wall section 4a.The also alternative slit portion 47 of low rigid portion, and constitute by tear line, wire otch.And, low rigid portion is formed on than close inboard, the bight of interior case 3, promptly is formed on the position of the rigidity that can not reduce the side surface part (along the 3a of foot of tear line 2b configuration) that disposes the 2nd strengthening rib 2d for the position at the both ends of the S. A. of fixed hinge portion 4.By forming above-mentioned low rigid portion, can suppress the strain of the S. A. of hinge 4, a 2a of portion is rotated smoothly.And the wide dh of slit portion 47 forms to such an extent that equate or the size below its spacing with the spacing of the 1st rib 4b.Particularly, the wide dh of slit 47 for example forms 15mm following (in preferred 3 to 15mm the scope).In addition, low rigid portion is not limited to shown position, can be formed between the 1st inboard rib 4b, also can form a plurality of slit portions 47.

And,, in the 5th variation, form tear line 48 on plate-like portion 2 in slit portion 47 and the 2a of door portion as Fig. 9 (A) and (B).By near low rigid portion, forming tear line 48, can be with the cracking Direction guide of plate-like portion 2 and the 2a of the door portion dotted arrow direction C in the figure, the stable direction that ftractures is rotated a 2a of portion smoothly.Tear line 48 can be connected with crank-like with tear line 2b, separates by making these tear lines 48,2b, can effectively absorb the impact that produces when a 2a of portion rotates.And shown in Fig. 9 (B), tear line 48 also can form gradually to the lateral direction of plate-like portion 2 with shoaling.Form gradual change portion by outside portion at tear line 48, the impact that produces in the time of can suppressing plate-like portion 2 crackings, the while effectively stops the cracking of plate-like portion 2.

The airbag apparatus that the present invention relates to then is described.Wherein, Figure 10 is the section-drawing of the airbag apparatus that the present invention relates to of expression.In addition, to the component parts mark identical mark identical with the 1st embodiment of the air cell covering of Figure 1 and Figure 2, and the repetitive description thereof will be omitted.

Airbag apparatus shown in Figure 10 has: air bag (not shown) is folded usually, and launches urgent the expansion constantly; Charging blower 6 provides gas to air bag; Retainer 7 is taken in air bag at least; Air cell covering 1, this retainer 7 of fastening also constitutes the automobile interior face.Charging blower 6 also can not be accommodated in the retainer 7, and is located at outward on the retainer 7.Retainer 7 is gone up the fastening hole 3d of formation by linking up with the 7a fastening with the side surface part bonded assembly to the 3a of foot of interior case 3, and is connected with fixed parts 9 by bonded block 8.

Above-mentioned airbag apparatus is an airbag device for front passenger's seat, is installed to be configured in the front passenger's seat fwd instrument carrier panel.Therefore, the surface of air cell covering 1 forms the part of instrument carrier panel.And air cell covering 1 uses the air cell covering 1 of the 1st embodiment of Figure 1 and Figure 2.Therefore, by on the connecting portion of plate-like portion 2 and interior case 3, forming the 1st thinner wall section 4a, can suppress connecting portion follow hardening of resin the time the distortion that contraction produced, can prevent that the surface of air cell covering 1 from producing pore, improved the exterior quality of air cell covering 1.And,, need not on plate-like portion 2, to form the thinner wall section that constitutes hinge 4 to constitute hinge 4 by configuration the 1st rib 4b on the lateral surface of the 1st thinner wall section 4a, can simplify the structure of hinge 4.Further, form in the mode of can deflection or buckling by making the 1st rib 4b, the impact that produces in the time of can absorbing the 2a of a portion rotation when keeping the expansion performance of air bag, has suppressed dispersing of the 2a of door portion.

In the above-described embodiment, as airbag apparatus is that example is illustrated with the airbag device for front passenger's seat, the invention is not restricted to airbag device for front passenger's seat, so long as can use the airbag apparatus of the air cell covering 1 that the present invention relates to, just applicable in various types of airbag apparatus such as driver-seat airbag device, installing side airbag device, knee air bag device.

In addition, the invention is not restricted to above-mentioned embodiment, the air cell covering 1 of the airbag apparatus that the present invention relates to also can use the device shown in the 2nd embodiment to the 8 embodiments, on the hinge 4 shown in the 3rd to the 8th embodiment of air cell covering 1, can form the 2nd rib 4c shown in the 2nd embodiment etc., in the scope that does not break away from purport of the present invention, can carry out various changes.

Claims (19)

1. an air cell covering is with plate-like portion and the integrated air cell covering of interior case, and described plate-like portion constitutes the automobile interior face, described in case be configured on the back side of described plate-like portion and the expansion that constitutes air bag launches path, it is characterized in that,

Described plate-like portion has: door portion, can when described airbag inflation launches, the mode of cracking forming; And hinge, rotatably keep this one,

Described hinge has: the 1st thinner wall section is formed in described on case and the connecting portion described plate-like portion; With a plurality of the 1st ribs, be configured on the lateral surface of described the 1st thinner wall section and can be when described airbag inflation launches deflection or buckle.

2. air cell covering according to claim 1 is characterized in that, described door portion to be can forming by the mode of the tear line cracking that forms on described plate-like portion,

The following thickness of wall thickness of thickness that the wall thickness of described the 1st thinner wall section formation and described tear line is roughly the same or described tear line.

3. air cell covering according to claim 1 is characterized in that, described the 1st rib forms thicklyer than described the 1st thinner wall section.

4. air cell covering according to claim 1 is characterized in that, described the 1st rib disposes continuously with 3 to 15mm spacing.

5. air cell covering according to claim 1 is characterized in that, described the 1st rib has the adjustment part, and this adjustment part can be adjusted at deflection that produces when described airbag inflation launches or the degree of buckling.

6. air cell covering according to claim 1 is characterized in that the back side of described plate-like portion has a plurality of strengthening ribs, the above thickness of thickness of thickness that the thickness of this strengthening rib formation and described the 1st rib is roughly the same or described the 1st rib.

7. air cell covering according to claim 1 is characterized in that, the thickness of described the 1st thinner wall section is set in 0.5 to 1.0mm the scope,

The thickness of described the 1st rib is set in 1.0 to 1.3mm the scope,

The thickness of described strengthening rib is set in 1.0 to 1.8mm the scope.

8. air cell covering according to claim 1 is characterized in that, described the 1st thinner wall section is formed obliquely in the outside of case in described.

9. air cell covering according to claim 1 is characterized in that, described the 1st thinner wall section be formed on described in case expand laterally and on the extension that forms.

10. air cell covering according to claim 9 is characterized in that, the 1st joint portion that is made of described the 1st thinner wall section and described extension forms to such an extent that the connecting portion of described the 1st thinner wall section and described plate-like portion is thick than being connected.

11. air cell covering according to claim 10 is characterized in that, by described extension and described in the 2nd joint portion that constitutes of the foot of case form thicklyer than described the 1st joint portion.

12. air cell covering according to claim 11 is characterized in that, the rigidity of described the 2nd joint portion is than described foot height.

13. air cell covering according to claim 9 is characterized in that, described extension has the rigidity low rigid portion lower than other parts near the both ends on the direction of described hinge.

14. air cell covering according to claim 13 is characterized in that, described plate-like portion has near the tear line that is formed on described low rigid portion.

15. air cell covering according to claim 1 is characterized in that, forms the 2nd little rib of described the 1st rib of intensity ratio on the medial surface of described the 1st thinner wall section.

16. air cell covering according to claim 9 is characterized in that, described the 2nd rib forms to such an extent that the thin or number of little or described the 1st rib of wall ratio of described the 1st rib of volume ratio is lacked than described the 1st rib.

17. air cell covering according to claim 1 is characterized in that, part on case and the connecting portion described plate-like portion, that do not constitute described hinge forms the 2nd thinner wall section in described.

18. air cell covering according to claim 11 is characterized in that, described door portion to be can forming by the mode of the tear line cracking that forms on described plate-like portion,

The following thickness of wall thickness of thickness that the wall thickness of described the 2nd thinner wall section formation and described tear line is roughly the same or described tear line.

19. an airbag apparatus has: air bag is folded usually, and launches urgent the expansion constantly; Charging blower provides gas to described air bag; Retainer is taken in described air bag at least; And air cell covering, the described retainer of fastening also constitutes the automobile interior face,

This airbag apparatus is characterised in that,

Described air cell covering each described air cell covering that is claim 1 to the claim 18.

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