阅读说明：本技术 安全气囊 (Air bag ) 是由 桥本和茂 石川智理 于 2019-05-22 设计创作，主要内容包括：本发明提供一种安全气囊,其能够以简单的结构获得适当的保护性能。安全气囊(10)具备并列配置有分别导入气体的多个气室(19)的袋状的安全气囊主体部(12)。并且,安全气囊(10)具备以使安全气囊主体部(12)的末端侧朝向基端侧而靠近头部(A)来限制安全气囊主体部(12)的膨胀形状的调整部(31)。(The present invention provides a kind of air bag, can obtain protective value appropriate in simple structure.Air bag (10) has the bag-shaped airbag body portion (12) for being arranged in parallel with the multiple gas chambers (19) for being directed respectively into gas.Also, air bag (10) has so that the end side of airbag body portion (12) limits the adjustment section (31) of the inflated configuration in airbag body portion (12) close to head (A) towards base end side.)

1. a kind of air bag, by being expanded the head to protect occupant, the substitute using imported gas Capsule is characterized in that having:

Bag-shaped airbag body portion is arranged in parallel with the multiple gas chambers for being directed respectively into gas；And

Adjustment section, to make the end side in the airbag body portion towards base end side and to limit in a manner of the close head State the inflated configuration in airbag body portion.

2. air bag according to claim 1, which is characterized in that

The adjustment section is formed in the unexpansive portion for not being imported into gas.

3. air bag according to claim 2, which is characterized in that

The adjustment section is folded by a part in the unexpansive portion and is fixed and formed.

4. air bag according to any one of claim 1 to 3, which is characterized in that have:

Reinforcement part protects the adjustment section, and protecting it from influences with the load bring of the expansion in airbag body portion.

5. air bag according to claim 4, which is characterized in that

The adjustment section and the reinforcement part are the sewing unit formed respectively by sewing line,

End side of the reinforcement part along the direction intersected with the adjustment section towards airbag body portion extends.

Technical field

The present invention relates to a kind of air bags on head for protecting occupant.

Background technique

In the past, about having the air bag device for importing gas and expanding the air bag of expansion, a kind of packet is disclosed Cover the head of the occupant of the carts such as bicycle and occupant protected or that cladding is sitting on the seat of automobile Head and the head-protecting air bag apparatus protected.For example, being used in the air bag master of this air bag device Body portion has multiple elongated gas chambers, these gas chambers configure side by side.Moreover, the airbag body portion becomes with the state of folding It accommodates, and the gas expansion by importing near occiput is unfolded and includes both sides of the head from occiput cladding and spread front The part in portion.

When for the structure, it is contemplated that if the inflow that airbag body portion passes through the gas imported from expansion base end side carries out Expansion is then stretched, thus before the protection portion split-phase of the fore head as expansion end side is for occupant because of its expansion It floats on head.

Therefore, the surface for disclosing the interior side pocket for for example being kept and being unfolded to gas by outer side pocket cladding is kept The structure of shape is (for example, referenced patent document 1.).

Patent document 1: Japanese Unexamined Patent Application Publication 2013-540209 bulletin (page 6~10, Fig. 2)

However, being become difficult using the structure such as above-mentioned complicated airbag body portion to reduce manufacturing cost.

Summary of the invention

The present invention has been made in view of the above-described circumstances, and an object thereof is to provide one kind can obtain in simple structure it is suitable When protective value air bag.

Air bag described in technical solution 1 protects occupant's by being expanded using imported gas Head, the air bag have: bag-shaped airbag body portion is arranged in parallel with the multiple gas chambers for being directed respectively into gas；And Adjustment section, to make the end side in the airbag body portion limit the peace in a manner of the close head towards base end side The inflated configuration in full air bag main body portion.

Air bag described in technical solution 2 is the air bag according to technical solution 1, wherein the adjustment section It is formed in the unexpansive portion for not being imported into gas.

Air bag described in technical solution 3 is the air bag according to technical solution 2, wherein the adjustment section It is folded by a part in the unexpansive portion and is fixed and formed.

Air bag described in technical solution 4 is the air bag according to any one of technical solution 1 to 3, tool Standby: reinforcement part protects the adjustment section, and protecting it from influences with the load bring of the expansion in airbag body portion.

Air bag described in technical solution 5 is the air bag according to technical solution 4, wherein the adjustment section And the reinforcement part is the sewing unit formed respectively by sewing line, the reinforcement part is along the direction court intersected with the adjustment section Extend to the end side in airbag body portion.

Invention effect

Air bag according to technical solution 1 is directed respectively into gas so as to be arranged in parallel with by adjusting portion's limitation Multiple gas chambers bag-shaped airbag body portion inflated configuration end side towards base end side and close to head, thus, it is possible to It is enough to expand the end side in airbag body portion in a manner of suitably coating the protected object region on head of occupant, So as to obtain protective value appropriate in simple structure.

According to air bag described in technical solution 2, other than the effect of the air bag described in the technical solution 1, lead to It crosses and adjustment section is formed in unexpansive portion, so as to be easily formed flowing of the adjustment section without hindering the indoor gas of gas.

Air bag according to technical solution 3 other than the effect of the air bag described in the technical solution 2, leads to It crosses and folds and fix a part in unexpansive portion and form adjustment section, so that the folding by unexpansive portion can be adjusted easily Make the end side in airbag body portion close to the amount on head.

According to air bag described in technical solution 4, in addition to air bag described in any one of technical solution 1 to 3 Except effect, adjustment section is protected by reinforcement part, protects it from the load bring shadow of the expansion with airbag body portion It rings, so that breakage occurs for adjustment section when being reliably prevented the expansion of airbag body portion, it can be suitably to wrap by adjusting portion The mode for covering the protected object region on the head of occupant expands the end side in airbag body portion.

According to air bag described in technical solution 5, other than the effect of the air bag described in the technical solution 4, make For the sewing unit for forming adjustment section and reinforcement part by sewing line, along the direction intersected with adjustment section towards airbag body The extended reinforcement part of the end side in portion, thus, it is possible to effectively receive the negative of the expansion in adjoint airbag body portion by reinforcement part It carries, so that it can be reliably prevented that the breakage of adjustment section caused by the fracture based on the sewing line because of caused by the load.

Detailed description of the invention

Fig. 1 (a) is the side view for indicating the expansion unfolded state of air bag of the 1st embodiment of the invention, Fig. 1 It (b) is the side view for indicating the expansion unfolded state of the air bag of comparative example.

Fig. 2 is the top view for indicating to constitute the state of the base fabric of the air bag of the 1st embodiment.

Fig. 3 (a) is the side view for indicating a part of air bag of the 1st embodiment, and Fig. 3 (b) is the I-I of Fig. 3 (a) The cross-sectional view of corresponding position.

Fig. 4 (a) to Fig. 4 (c) is the manufacturing process for indicating the airbag body portion of air bag of the 1st embodiment Explanatory diagram, Fig. 4 (d) are the cross-sectional views of the corresponding position II-II of Fig. 4 (c).

Fig. 5 (a) is the side view for indicating a part of air bag of the 2nd embodiment of the invention, and Fig. 5 (b) is Fig. 5 (a) cross-sectional view of the corresponding position III-III.

Fig. 6 (a) is the side view for indicating a part of air bag of the 3rd embodiment of the invention, and Fig. 6 (b) is Fig. 6 (a) cross-sectional view of the corresponding position IV-IV.

Fig. 7 (a) is the side view for indicating the expansion unfolded state of air bag of the 4th embodiment of the invention, Fig. 7 It (b) is the side view for amplifying a part for indicating Fig. 7 (a).

Fig. 8 is the top view for indicating to constitute the state of the base fabric of the air bag of the 5th embodiment of the invention.

Fig. 9 (a) is the side view for indicating a part of air bag of the 5th embodiment, and Fig. 9 (b) is the I-I of Fig. 9 (a) The cross-sectional view of corresponding position.

Symbol description

10- air bag, 12- airbag body portion, the unexpansive portion 17-, 19- gas chamber, 31- adjustment section, 35- reinforce Portion, the head A-.

Specific embodiment

Hereinafter, being illustrated with reference to attached drawing to the 1st embodiment of the invention.

In Fig. 1 (a), symbol 10 indicates air bag.The air bag device shown in Fig. 2 for having the air bag 10 11 be the head-protecting air bag apparatus of the head A of the occupant of the bicycle of protection as moving body etc..Present embodiment In, which is, for example, the two-wheel vehicle used air bag device being worn on around the neck of occupant.In addition, with Under, front-rear direction (direction arrow FR and the direction arrow RR), left and right sides direction (direction arrow L shown in FIG. 1 and the arrow side R To) and up and down direction (direction arrow U and the direction arrow D) respectively on the basis of the state of occupant's safe wearing airbag apparatus 11 It is illustrated.

Moreover, the air bag device 11 is also referred to as air bag mould group, therefore bag-like enclosure is used as in addition to having Except the above-mentioned air bag 10 in the airbag body portion 12 in portion, it is also equipped with filling to 12 supply gas of airbag body portion Control mechanism and the battery (secondary cell) of power supply as them of the movement of mechanism of qi, control inflator etc..Moreover, about this Air bag device 11, that is, for example by prescriptive procedure fold state air bag 10 (airbag body portion 12) with Inflator, control mechanism and battery etc. are contained in the inside of the covers such as fabric together, and around the neck of occupant and It wears.

Inflator has the main part with the shapes such as discoid or cylindric.Main part inside accommodate igniter and Medicament, igniter will be expanded by the electric signal burning medicament from control mechanism via the connector transmitting connected It is quickly supplied in airbag body portion 12 with gas from the gas ejection ports for being formed in main part.

Control mechanism has the sensor or control device of detection impact, which connects via signal wire and inflator It connects, and detects to make inflator work when regulation impact by sensor.

Moreover, airbag body portion 12 is merged by groups such as sewing, bonding or weldings engages single or multiple base fabrics, from And it is integrally formed as bag-shaped.That is, airbag body portion 12 can use 1 base fabric with so-called One-piece woven (One Piece Woven, OPW) it carries out cylinder and knits and formed, it can also be formed as bag-shaped by 2 or more the base fabrics of engagement such as sewing.And And the airbag body portion 12 has: gas introduction part 15, imports gas from inflator；Bulge 16, by from the gas Introduction part 15 imports gas and expands；And unexpansive portion 17, it is not imported into gas.Moreover, the airbag body portion 12 is formed To be engaged by the joint portion 18 of the formation such as utilization sewing, to become around the neck in the case where expanding unfolded state from occupant Coat the three-dimensional shape of the helmet-like on head.

Gas introduction part 15 is formed as opening portion.The gas introduction part 15 is the exhibition as airbag body portion 12 Open the part of base end side.In the present embodiment, which is located at the rear portion around the neck of occupant.The gas It for example can be inserted into a part for having the main part of inflator in introduction part 15.

Bulge 16 has multiple gas chambers (chamber) 19 expanded by the importing of the gas from gas introduction part 15. Also, the gas guide portion 20 of the flowing for the gas that control is imported to gas chamber 19 is formed in the bulge 16.

Multiple 1st gas chambers 22 extended in left-right direction are set in gas chamber 19 and with multiple 2nd gas of radiated entend Room 23.

Each 1st gas chamber 22 be gas via inflator from gas introduction part 15 directly imported gas chamber.Each 1st gas chamber 22 Be formed as elongated in left-right direction, and prominent from the difference left direction of gas introduction part 15 and right direction.Moreover, each 1st gas chamber 22 with the mutual end side mode opposed in the forward position of the neck neck of occupant is wound and be located at occupant neck week It encloses, to protect the neck neck of occupant in the case where expanding unfolded state.

Each 2nd gas chamber 23 is located at the position of upside relative to each 1st gas chamber 22, and left and right configuration side by side each other.In this reality It applies in mode, each 2nd gas chamber 23 is for example configured in a manner of symmetrical.In the present embodiment, the 2nd gas chamber 23 is in left and right two Side is respectively formed with 3, is formed with 1 in central portion, but the number or shape and is not limited.Also, each 2nd gas chamber 23 It is last from base end side (downside) direction with the distance of edge such as under the state (Fig. 2) of the base fabric before being engaged by joint portion 18 The mode that end side (upside) is gradually increased extends, and in other words, is unfolded in finger-shaped and extends.Therefore, in the present embodiment, Between 2 gas chambers 23 by joint portion 18 engage before base fabric in the state of become the 25, the 2nd gas chamber 23 of notch section each other Interval and formed.Moreover, each 2nd gas chamber 23 becomes the rear portion protected in the case where expanding unfolded state from the head A of occupant Throughout both sides and the position of front.

As long as gas guide portion 20 can be efficiently directed into gas to gas chamber 19, can at an arbitrary position on arbitrary shape Shape is formed, and still, such as in present embodiment, is set with: the 1st gas guide portion 27, close to 15 position of gas introduction part and to Top guides gas；2nd gas guide portion 28 further guides gas from the 1st gas guide portion 27 to the left and right；And the 3rd gas Guide portion 29 guides gas in side left and right further up from the 1st gas guide portion 27.Gas guide portion 20 is such as by sewing It engages base fabric and is formed.

Along each gas chamber 19 of bulge 16 in the state of base fabric before being engaged by joint portion 18 of unexpansive portion 17 Outer rim is formed as foliaceous.The unexpansive portion 17 of present embodiment for example as the jointing edge (tape edge) of the gas chamber 19 in base fabric and It is formed.Moreover, in the present embodiment, being formed with adjustment section 31 in unexpansive portion 17.Adjustment section 31 is so that airbag body The expansion end side (on the upside of front) in portion 12 limits peace close to the head A of occupant towards expansion base end side (on the downside of rear) The inflated configuration in full air bag main body portion 12.In the present embodiment, non-swollen pinching and folding as shown in Fig. 3 (a) and Fig. 3 (b) It fixes to form the adjustment section 31 by sewing etc. in the state of a part in swollen portion 17.For example, the adjustment section of present embodiment 31 be the sewing unit formed by sewing line.The collapsed shape in unexpansive portion 17 of the adjustment section 31 is used to form in this embodiment party For example be formed as linear along the left and right directions along the 1st gas chamber 22 in formula.In addition, being used to form the unexpansive portion of adjustment section 31 17 folding position becomes the base end side of the 1st gas chamber 22 i.e. close to the position of gas introduction part 15.Also, the tune of present embodiment Whole 31 are respectively formed in the position in the unexpansive portion 17 between each 1st gas chamber 22 and the 2nd gas chamber 23.Therefore, in air bag Under the expansion unfolded state of main part 12, adjustment section 31 is located at the upside of each 1st gas chamber 22 and is configured at the neck (jaw of occupant Portion) two sides.

Joint portion 18 is such as the position for arranging the unexpansive portion 17 of the end side of the 2nd gas chamber 23 by formation sewing. In present embodiment, such as the state of the base fabric shown in Fig. 4 (a) is being overlapped adjacent and is arranging to the left and right as shown in Fig. 4 (b) The 2nd gas chamber 23 a part in the state of, as shown in Fig. 4 (c), pass through sewing etc. engagement the 2nd gas chamber 23 end side shape At joint portion 18.Therefore, as shown in Fig. 4 (d), a part of the 2nd adjacent gas chamber 23 by joint portion 18 in left and right directions and It overlaps each other and is formed in up and down direction, these the 2nd gas chambers 23 are integrally formed in the state of close in the lateral direction each other. More specifically, the 2nd adjacent gas chamber 23 is configured to from the overhead of occupant throughout head in airbag body portion 12 Both sides and be in an inclined direction overlapped, and airbag body portion 12 become three-dimensional shape.That is, the 2nd gas chamber 23 is with safety The mode that the expansion end side in air bag main body portion 12 narrows overlaps.In addition, joint portion 18 can be after forming adjustment section 31 It is formed, can also be formed before forming adjustment section 31.

Then, the expansion movement of air bag device 11 is illustrated.

The summary of movement as the air bag device 11, when cart collision etc., if being detected by sensor Defined impact, then control device makes inflator work, and sprays gas from the inflator.Moreover, being sprayed by inflator Gas out flows into the inside in airbag body portion 12 from gas introduction part 15, and is directed respectively by gas guide portion 20 1st gas chamber 22 and the 2nd gas chamber 23, airbag body portion 12 is expanded from the state of folding to be unfolded, and thus tears because pressure is unfolded in it It is protruded after splitting a part of cover, to coat the head A of occupant throughout fore head from occiput.

At this point, the 2nd gas chamber 23 passes through base end side to end side, to encase occupant head from rear with the gas of importing The top of A and the mode of both sides are toppled over and are unfolded forwards.Therefore, neck of the 1st gas chamber 22 of bulge 16 in occupant Expansion is expanded around portion, the 2nd gas chamber 23 is in the solid slightly round (from rear encirclement head A) coincideing with the shape of head A Shape expansion.That is, bulge 16 is in using the occupant opposed portion opposed with the head A of occupant as the pocket-like (half of inside Cheese) expansion.At this point, by adjusting portion 31 limitation, so as to make airbag body portion 12 inflated configuration expansion end Side is towards expansion base end side and close to head A, and thus, it is possible to the protected object areas suitably to coat the head A as occupant The mode of front, that is, fore head (forehead portion) of the head A of the occupant in domain expands the expansion end in expansion airbag body portion 12 End side.Specifically, adjustment section 31 is so that as under the expansion unfolded state in airbag body portion 12 as shown in Fig. 1 (a) The part P of the front end side of end side works to the mode of the fore head of occupant being located proximate to, and does not have adjustment section 31 Fig. 1 (b) shown in the airbag body portion 12a of air bag 10a of comparative example compare, before airbag body portion 12 The part P of end side is tilted in a manner of the fore head from top cladding occupant.Even if that is, for will be by planar base fabric structure At air bag 10a be bonded into three-dimensional shape, it is also difficult to making to coat to the fore head of the head A of occupant becomes three-dimensional side Face in present embodiment, without complicated engagement etc., and can easily change airbag body merely with adjustment section 31 Gradient under the unfolded state in portion 12, and air bag 10 can be unfolded in a manner of the fore head for coating occupant.It should As a result, becoming complicated with the shape or sewing for for example making base fabric, or considers the float-amount of self-shield subject area and increase safety The situation that the capacity in air bag main body portion 12 is corresponding compares, and can obtain protection appropriate in simple structure by air bag 10 Performance.

Also, by the way that adjustment section 31 is formed in unexpansive portion 17, adjustment section 31 can be easily formed without hindering gas The flowing of gas in room 19.

In addition, adjustment section 31 is formed by a part for folding and fixing unexpansive portion 17, from there through unexpansive portion 17 folding, which can be adjusted easily, makes the expansion end side in airbag body portion 12 close to the amount of head A.

For example, the 2nd embodiment as shown in Fig. 5 (a) and Fig. 5 (b), unexpansive portion 17 is folded and is fixed into incline Ramp-like and form adjustment section 31, the 3rd embodiment as shown in Fig. 6 (a) and Fig. 6 (b) folds in unexpansive portion 17 simultaneously It is fixed into 2 foldings or more and is formed.It, being capable of appropriate adjustment substitute at folding by so adjusting unexpansive portion 17 or folding amount The angle of the expansion end side of capsule main part 12 or position.That is, airbag body of the adjustment section 31 according to expansion unfolded state The desired shape in portion 12, can arbitrarily fold and form unexpansive portion 17.

Then, with reference to Fig. 7, the 4th embodiment is illustrated.In addition, about structure identical with the respective embodiments described above And simultaneously the description thereof will be omitted for the additional the same symbol of effect.

The air bag 10 of present embodiment has reinforcement part 35, and protection adjustment section 31 is protected it from air bag The load bring of the expansion of main part 12 influences.

As shown in Fig. 7 (a), reinforcement part 35 is the sewing unit formed with adjustment section 31 likewise by sewing line, and this reality The reinforcement part 35 for applying mode is the sewing line extension that will constitute adjustment section 31 and the extension sewing unit formed.That is, reinforcement part 35 with Adjustment section 31 is formed by identical sewing line.In the present embodiment, reinforcement part 35 is configured at unexpansive portion 17.Reinforcement part 35 Such as extended to form to the part in the unexpansive portion 17 for being formed with adjustment section 31.Reinforcement part 35 can be formed in locating for adjustment section 31 The part for being pinched and folding in unexpansive portion 17, the part that can also be pinched and fold into unexpansive portion 17 extend.Shape It, can be along so that unexpansive portion 17 when at the part for being pinched and folding in unexpansive portion 17, such as shown in Fig. 7 (b) The bending section 36 that is formed relative to the curved mode in part locating for adjustment section 31 of a part form reinforcement part 35.Reinforcement part 35 It is connected with adjustment section 31, and edge is formed as skewed with the direction that adjustment section 31 is intersected.Reinforcement part 35 is from the end of adjustment section 31 End side towards airbag body portion 12 is that front upside extends.

In airbag body portion 12, the direction intersected with adjustment section 31, in present embodiment on the upside of rear (arrow The direction F) generate the load of limitation original-shape to be restored relative to adjustment section 31, and can by along intersecting with the load or The reinforcement part 35 that orthogonal direction extends receives the load, therefore is pinched and folds and fix by adjusting portion 31 unexpansive Portion 17 can be improved resistance to load, so as to prevent the sewing line of adjustment section 31 to be broken because of the load.

Also, the inside that airbag body portion 12 is flowed into from the gas that inflator sprays from gas introduction part 15, passes through Gas guide portion 20 is directed respectively into the 1st gas chamber 22 and the 2nd gas chamber 23, and airbag body portion 12 is expanded from the state being folded When expansion, the 2nd gas chamber 23 with importing gas by base end side to end side, with encased from rear occupant head A it is upper The mode of portion and both sides is toppled over and is unfolded forwards.Therefore, at expansion initial stage, with the expansion in airbag body portion 12 It is supported on the direction for resulting from rear upside, intersecting with adjustment section 31, in other words, composition adjustment section 31 will be sheared by becoming direction Sewing line direction generate.That is, becoming the limit along the unexpansive portion 17 with airbag body portion 12 relative to adjustment section 31 The identical direction of load for making original-shape to be restored generates load.Reinforcement part 35 extends shape along the direction intersected with adjustment section 31 At effectively receiving the load from there through entire reinforcement part 35, so that load be prevented to be focusing only on the front end of adjustment section 31. As above, the load bring shadow for the expansion for protecting adjustment section 31 to protect it from airbag body portion 12 by reinforcement part 35 It rings, can be improved resistance to load, so that it can be reliably prevented that breakage occurs for adjustment section 31 when airbag body portion 12 expands. That is, being reliably prevented from the sewing line of adjustment section 31 because load is broken.It therefore, can be to make air bag by adjusting portion 31 The mode that the end side of main part 12 suitably coats the protected object region on the head of occupant expands.

Also, unexpansive portion 17 be adjusted portion 31 folding, thus adjustment section 31 extend direction with intersect direction, this reality Apply it is relatively narrow relative to up and down direction in mode, therefore be folded part with the end phase of the adjustment section 31 linearly extended Even, reinforcement part 35 only is formed by Length Quantity required when receiving load, thus compared with the case where tilting entire sewing unit, phase For relatively narrow unexpansive portion 17, adjustment section 31 and reinforcement part 35 can be effectively configured.

In addition, reinforcement part 35 is conjointly formed by constituting the sewing line of adjustment section 31 with adjustment section 31, therefore can be Part is sewed by it when forming adjustment section 31 to be formed, so that manufacture is easy and cost is few, and is easy to improve resistance to load.

Alternatively, it is also possible to the 5th embodiment as shown in Fig. 8, Fig. 9 (a) and Fig. 9 (b), by the U of a part of notch The peripheral part in the unexpansive portion 17 of shape is overlapped, and fixes to form adjustment section 31 by sewing etc..As a result, with Fig. 1 (a) institute The case where showing, similarly adjustment section 31 was with expansion end side (on the upside of front) the direction expansion base end side in airbag body portion 12 The mode of (rear on the downside of) and the head A close to occupant limit the inflated configuration in airbag body portion 12.

Thereby, it is possible to airbag body portion 12 is easily manufactured.In addition, as formation is illustrated with Fig. 7 (b) , as sewing part extension reinforcement part 35 when, can easily set reinforcement part 35.

In addition, in the respective embodiments described above, adjustment section 31 or reinforcement part 35 are not limited to be formed in unexpansive portion 17, Such as it can be by forming the unexpansive portion of a part for the base fabric for constituting bulge 16 (gas chamber 19) using folding and engaging 17。

Also, adjustment section 31 or reinforcement part 35 are other than being formed in airbag body portion 12 itself, such as can lead to The shapes limiting mechanism such as tether or suspender belt is crossed to be formed.

In addition, air bag device 11 can also for example be used as the head for the occupant being configured on the seat of automobile The air bag device of the headrest at the rear of A etc..

Industrial availability

The present invention is preferably e.g. as two-wheel vehicle used head-protecting air bag apparatus.