JP2012144098A - Airbag, and airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airbag and an airbag device configured in such a manner that a flow regulation means can be stably maintained in a folded state.SOLUTION: Usually, an airbag 1 is folded and housed within an instrument panel I, and in an emergency, gas is supplied to the air bag 1 to inflate and expand the airbag 1 between the windshield W and an occupant P. The airbag 1 has a flow regulation means 5 disposed therein and controlling the flow of the gas. The flow regulation means 5 is provided with: openings (such as a first opening 51, a second opening 52 and a third opening 53) for supplying the gas to the airbag 1; and an engagement piece 54 disposed near the first opening 51. The engagement piece 54 is configured in such a manner that the engagement piece 54 can engage with an affixation means 6 of the flow regulation means 5 and that the engagement piece 54 can break when the flow regulation means 5 is inflated and expanded.

Description

  The present invention relates to an airbag and an airbag device, and more particularly to an airbag and an airbag device having a rectifying means in the airbag.

  It has become common for vehicles such as automobiles to be equipped with an airbag device for inflating and deploying an airbag in the vehicle in the event of an emergency such as a collision or sudden deceleration to absorb the impact generated on the passenger. Yes. These airbag devices generally include an airbag that is normally folded and inflated and deployed in an emergency, an inflator that supplies gas to the airbag, a retainer that fixes the airbag and the inflator, And an airbag cover that covers the airbag.

  When the vehicle collides or suddenly decelerates, gas is supplied from the inflator to the airbag, the airbag is inflated, the airbag cover is opened, the airbag is released into the vehicle, and is inflated and deployed. In particular, in the case of a passenger seat airbag device, the airbag is inflated and deployed in a space surrounded by an instrument panel, a windshield (front glass), and an occupant.

  As such an airbag device, for example, as described in Patent Literature 1 and Patent Literature 2, an airbag device in which a rectifying means such as an inner bag or a diffuser is disposed inside the airbag has been proposed.

  The rectifying means described in Patent Document 1 is an inner bag held in a state sandwiched between a windshield (front glass) and an instrument panel, and deployment of the airbag formed in the inner bag in the vertical direction. And a blowout hole for promoting. Therefore, in the airbag device described in Patent Document 1, the inner bag can be fixed between the windshield (front glass) and the instrument panel by the internal pressure of the inner bag, and is supplied from the gas blowing hole. It is possible to stabilize the gas flow to stabilize the deployment behavior of the airbag.

  The rectifying means described in Patent Document 2 includes an inner bag formed in a small bag that does not fly beyond the rear end of the instrument panel to the rear of the vehicle, and an upper hole portion and a lower side formed in the inner bag. And the upper hole portion is provided in a portion that bulges rearward of the vehicle beyond the cleaved door terminal, and the lower hole portion is provided in a portion that bulges beyond the opening portion of the instrument panel. It has been. Therefore, in the airbag apparatus described in Patent Document 2, the possibility that the inflated inner bag can come into contact with the passenger close to the instrument panel can be reduced, and the upper hole portion and the lower hole portion are blocked. The airbag can be preferentially inflated and deployed in the vertical direction.

JP-A-10-203280 JP 2001-233152 A

  Conventional airbag devices such as those described in Patent Document 1 and Patent Document 2 generally press the airbag against the windshield and use the reaction force to stabilize the position and deployment behavior of the airbag. I am letting.

  On the other hand, in recent years, various types of vehicles have been developed, and the windshield installation angle is designed to be different for each vehicle type within a range of 0 ° to 90 °. Therefore, the position and configuration of the airbag device, the size and shape of the airbag, the type of base fabric, the gas pressure / capacity of the inflator, the presence / absence of the rectifying means, the structure, etc. are designed for each vehicle type. Is the current situation. As a result, there are problems that it is difficult to reduce the cost of the airbag device and to share parts. In addition, when trying to downsize the airbag, it is difficult to press the airbag against the windshield, and there has been a desire to be independent without using the reaction force from the windshield.

  Furthermore, when trying to use the rectifying means (inner bag or inner bag) as described in Patent Document 1 or Patent Document 2 described above when trying to make the air bag self-supporting, it is important to control the expansion of the rectifying means. It becomes. However, the conventional rectifying means has a problem that if it is to be folded separately from the airbag, it must be folded in a groping state in the airbag, the folded state becomes unstable, and variation tends to occur.

  The present invention has been devised in view of such problems, and an object thereof is to provide an airbag and an airbag apparatus that can stabilize the folded state of the rectifying means.

  According to the present invention, it is an airbag that is normally folded and built in an instrument panel, and is inflated and deployed between a windshield and an occupant when gas is supplied in an emergency. There is a rectifying means disposed inside for controlling the flow of the gas, the rectifying means comprising: an opening for supplying the gas to the airbag; and an engagement piece disposed in the vicinity of the opening. And the engagement piece is configured to be engageable with the fixing means of the rectifying means and to be ruptured when the rectifying means is inflated and deployed.

  Further, according to the present invention, the airbag that is normally folded and inflated and deployed in an emergency, an inflator that supplies gas to the airbag, a retainer that fixes the airbag and the inflator, and the airbag In the airbag device having an airbag cover that covers the bag, the airbag is normally folded and built in the instrument panel, and gas is supplied in an emergency between the windshield and the occupant. And a rectifying means that is disposed inside the airbag and controls the flow of the gas, the rectifying means comprising: an opening for supplying the gas to the airbag; and An engaging piece disposed in the vicinity of the engaging piece, the engaging piece being engageable with the fixing means of the rectifying means, and when the rectifying means is inflated and deployed. Sectional possible a configuration, an airbag device is provided, characterized in that.

  In the airbag and the airbag device, the fixing means is, for example, a bag ring that fixes the rectifying means and the airbag to a retainer that accommodates the airbag, and the bag ring includes the rectifying means and the airbag. It has a fixing bolt inserted through the airbag. The fixing bolt may be inserted through the rectifying means, the engagement piece, and the airbag.

  The rectifying means includes, for example, a first panel fixed by the fixing means and a second panel connected to the first panel, and the engaging piece is the first panel or the second panel. It may be formed integrally with the panel, or may be formed and sewn separately from the first panel or the second panel.

  The engagement piece may be formed in a shape that does not interfere with an inflator that supplies the gas to the airbag.

  The airbag may be inflated and deployed so as not to contact the windshield. In addition, the opening includes the first opening for supplying the gas so as to press a part on the passenger side of the airbag against the instrument panel, and the base end on the windshield side of the airbag. A second opening for supplying gas, and the engagement piece may be disposed at an end of the first opening or the second opening. Furthermore, the opening may have a third opening for supplying the gas so as to lift the airbag upward.

  According to the airbag and the airbag apparatus according to the present invention described above, since the engaging piece is arranged on the rectifying means, the rectifying means can be bent and fixed to the fixing means, and the folded state of the rectifying means is stabilized. be able to. Further, by allowing the rectifying means to be bent and fixed, the outflow of gas from the opening during expansion and deployment of the rectifying means can be suppressed, and the rectifying means can be rapidly inflated and deployed. Deployment control can be easily performed.

  Further, by engaging the engaging piece with the fixing means (bag ring and fixing bolt) of the rectifying means, the folded state of the rectifying means can be stabilized using existing parts.

  Further, by inserting the rectifying means, the engaging piece, and the airbag in this order into the fixing bolt, the engaging piece can be easily engaged with the fixing means.

  Further, by configuring the rectifying means from the first panel and the second panel, the rectifying means can be easily formed simply by stitching the outer periphery. Furthermore, the engagement piece can be easily formed by forming the engagement piece integrally with the first panel or the second panel. Even when the engagement piece is formed separately from the first panel and the second panel, the engagement piece is easily sewn together at the stitching portion of the first panel and the second panel. A rectifying means having a piece can be formed.

  Further, by forming the engaging piece in a shape that does not interfere with the inflator, the engaging piece can be engaged with the fixing means without impairing the action of the inflator.

  Further, by preventing the airbag from coming into contact with the windshield, the airbag can be made independent without using a reaction force from the windshield. By making the air bag self-supporting, it is possible to make the parts of the air bag and the air bag device common regardless of the installation angle of the windshield and the vehicle type, thereby reducing the cost of the air bag and the air bag device. Can do.

  Also, by forming the first opening and the second opening in the rectifying means, the airbag can be pressed against the instrument panel to stabilize the position of the airbag, and the base end of the airbag on the windshield side The gas can be supplied to the airbag to prevent the airbag from being bent, and the airbag can be easily made independent without using the reaction force from the windshield. Furthermore, by forming the third opening in the rectifying means, the airbag can be easily lifted upward, and the airbag can be quickly inflated and deployed at a position suitable for restraining the occupant.

1 is an overall configuration diagram showing a first embodiment of an airbag device according to the present invention. It is a figure which shows the rectification | straightening means shown in FIG. 1, (A) has shown the 1st panel and (B) has shown the 2nd panel. It is a figure which shows the assembly method of the airbag shown in FIG. 1, (A) is a components block diagram, (B) is an arrangement | positioning process, (C) is a bending process, (D) has shown the engagement process. . It is a figure which shows the expansion | deployment expansion | deployment step of the rectification | straightening means shown in FIG. It is a figure which shows the modification of the rectification | straightening means shown in FIG. 2, (A) is a 1st modification, (B) is a 2nd modification, (C) is a 3rd modification, (D) is a 4th modification. An example. It is a figure which shows the modification of an engagement piece, (A) is a 1st modification, (B) is a 2nd modification, (C) is a 3rd modification, (D) is a 4th modification, (E ) Is a fifth modification, and (F) is a sixth modification. It is a figure which shows 2nd embodiment of the airbag which concerns on this invention, (A) is a 1st panel, (B) is a 2nd panel, (C) has shown the bending process of the assembly method.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is an overall configuration diagram showing a first embodiment of an airbag apparatus according to the present invention. FIG. 2 is a diagram showing the rectifying means shown in FIG. 1, wherein (A) shows the first panel and (B) shows the second panel. 3 is a view showing an assembly method of the airbag shown in FIG. 1, wherein (A) is a component configuration diagram, (B) is an arrangement step, (C) is a bending step, and (D) is an engagement. The process is shown. FIG. 4 is a diagram showing an inflated and deployed stage of the rectifying means shown in FIG. Is shown.

  As shown in FIGS. 1 to 4, the airbag device according to the first embodiment of the present invention is folded in a normal state and inflated and deployed in an emergency, and supplies gas to the airbag 1. It has an inflator 2, an air bag 1 and a retainer 3 that fixes the inflator 2, and an air bag cover 4 that covers the air bag 1. The air bag 1 is normally folded and built in the instrument panel I. The rectifying means 5 that is supplied in the event of an emergency and is inflated and deployed between the windshield W (or the windshield) and the occupant P and that controls the flow of gas disposed inside the airbag 1 is provided. The rectifying means 5 has an opening (for example, a first opening 51, a second opening 52, and a third opening 53) that supplies gas to the airbag 1 and is disposed in the vicinity of the first opening 51. Engaging piece 54 includes a engaging piece 54 is engageable with the fixing means 6 of the rectifier means 5, and is breakable configured during inflation and deployment of the rectification means 5.

  The airbag apparatus shown in FIG. 1 is a so-called passenger-seat airbag apparatus. The airbag 1 includes a windshield W in a space surrounded by an occupant P seated on a seat S, a windshield W, and an instrument panel I. Inflated and deployed so as not to come into contact with. That is, in the airbag 1 according to the first embodiment of the present invention, the shape of the airbag 1 after being inflated and deployed is configured to have a certain gap C with respect to the windshield W. It is configured so that it can stand on its own without using power. The airbag 1 may be formed with a vent hole 12 that exhausts gas in the airbag 1 to absorb impact when the occupant P contacts the airbag 1.

  Here, the case where the airbag 1 is self-supporting is illustrated, but the air bag 1 is not necessarily self-supporting, and the airbag 1 and the windshield W are in contact with each other as in the conventional airbag. Even when the airbag 1 and the windshield W are in contact with each other, the reaction force from the windshield W is small and the airbag 1 is substantially self-supporting. It may be.

  Further, FIG. 1 shows a state where the airbag 1 is inflated and deployed. However, in the state before the airbag 1 is inflated and deployed, as shown in FIG. Constitutes a part of the instrument panel I. The airbag cover 4 includes a plate-like portion 41 that constitutes a vehicle interior surface, and an inner case 42 that is disposed on the back surface of the plate-like portion 41 and constitutes an inflation / deployment path of the airbag 1. The door 41 is formed in the portion 41 so as to be cleavable when the airbag 1 is inflated and deployed. In addition, about the structure of the airbag cover 4, it is not limited to what was illustrated, What was used conventionally can be selected suitably and can be used.

  The inflator 2 has a substantially cylindrical outer shape, and a gas outlet is formed on a side peripheral surface of a tip portion included in the airbag 1. The inflator 2 is fitted into an opening formed in the retainer 3 and fixed by a fixing means 6. The inflator 2 is connected to an ECU (electronic control unit) (not shown) and is controlled based on measurement values of an acceleration sensor or the like. In an emergency where the ECU senses or predicts a vehicle collision or sudden deceleration, the inflator 2 is ignited by an ignition current from the ECU, burns the chemical stored in the inflator 2, generates gas, and rectifying means Gas is supplied to the airbag 1 via 5. Note that the shape and fixing method of the inflator 2 are not limited to those shown in the drawings, and those conventionally used can be appropriately selected and used.

  As shown in FIG. 4A, the retainer 3 is locked in a locking hole formed in the inner case 42 by a hook 31 connected to the side surface portion, and has a vehicle interior structure via a joining member. It is connected to the object 7. In addition, about the retainer 3 and its connection structure, it is not limited to what was illustrated, What was used conventionally can be selected suitably and can be used.

  As shown in FIG. 2, the rectifying means 5 includes a first panel 5a fixed by the fixing means 6 and a second panel 5b connected to the first panel 5a. The first panel 5a is integrally formed. The first panel 5a includes a first opening 51 that supplies gas so as to press a portion of the airbag 1 on the passenger P side against the instrument panel I, an inflator opening 55 through which the inflator 2 is inserted, and an inflator A plurality of engaging holes 56 arranged on the outer periphery of the opening 55 and through which a part of the fixing means 6 is inserted. The second panel 5b includes a second opening 52 for supplying gas to the base end 11 of the airbag 1 on the windshield W side, and a third opening for supplying gas so as to lift the airbag 1 upward. 53. The first panel 5 a and the second panel 5 b are overlapped and stitched along the stitching line 57 to constitute the rectifying means 5. Such rectifying means 5 may be referred to as an inner bag, a diffuser, a small chamber, or the like.

  Although not shown, the panel constituting the rectifying means 5 is not limited to the combination of the illustrated first panel 5a and second panel 5b, and either one of the first panel 5a or the second panel 5b is used. It may be formed larger than the other, may be a single panel formed in a three-dimensional bag shape, or may be divided into three or more pieces and stitched.

  The engagement piece 54 is disposed at an end portion of the first panel 5a on the first opening 51 side, and a connection portion 54a connected to the first panel 5a and a half formed integrally with the connection portion 54a. It has an annular portion 54b and a plurality of engaging holes 54c through which a part of the fixing means 6 formed in the semi-annular portion 54b is inserted.

  The connecting portion 54a is formed with a slit 54d for breaking the engaging piece 54 when the rectifying means 5 is inflated and deployed. The slit 54d is an elongated cut, and the length and the number are arbitrarily set in consideration of the width of the connecting portion 54a, the breaking strength, and the like. Moreover, the slit 54d may be a slot-shaped opening or may be a notch formed on both sides. In addition, when the width of the engagement piece 54 is sufficiently thin and can be broken without forming the slit 54d, the slit 54d may be omitted.

  Further, by forming the engagement hole 54 c of the engagement piece 54 in the semi-annular portion 54 b, the engagement piece 54 is formed in a shape that does not interfere with the inflator 2 that supplies gas to the airbag 1. That is, as shown in FIG. 2A, the semi-annular portion 54b has a shape that substantially matches the outer edge of the inflator opening 55 when the first panel 5a is bent along the fold line L. is doing. The engagement hole 54c of the engagement piece 54 is formed so as to coincide with the engagement hole 56 of the first panel 5a when the first panel 5a is bent along the fold line L. Is engaged with the fixing means 6. When the first panel 5a and the second panel 5b are folded along the fold line L, the first opening 51 is located inside the rectifier 5 when the first panel 5a and the second panel 5b are stitched together. Therefore, the outflow of gas at the initial stage of the expansion and expansion of the rectifying means 5 can be suppressed.

  Further, although it is difficult to confirm the folded state of the rectifying means 5 disposed in the airbag 1 in the sub-assy state, the engaging piece 54 is engaged with the fixing means 6 to engage with the fixing means 6. The joined engagement piece 54 can be confirmed in the sub-assembly state, and convenience can be improved.

  The first opening 51, the second opening 52, and the third opening 53 are formed so that the opening areas have a relationship of first opening 51 ≧ second opening 52> third opening 53. ing. By setting the size of the opening area in this way, the airbag 1 can be effectively pressed against the instrument panel I, the bending of the airbag 1 can be effectively suppressed, and the air effectively The bag 1 can be lifted upward.

  As shown in FIG. 1, since the airbag 1 is greatly inflated and deployed toward the occupant P, the base end portion 11, which is the base portion of the airbag 1, is easily bent due to its weight. By supplying a large amount of gas to the base end portion 11 of the bag 1 on the windshield W side, the internal pressure of the base portion of the airbag 1 can be kept substantially constant, and bending of the airbag 1 can be suppressed. it can. Further, by configuring the second opening 52 to discharge the gas toward the door 43 of the instrument panel I that has been cleaved when the airbag 1 is inflated and deployed, the gas from the inflator 2 can be effectively aired. It can be dispersed in the root portion of the bag 1 on the windshield W side.

  The fixing means 6 is a bag ring 61 for fixing the rectifying means 5 and the airbag 1 to the retainer 3 that accommodates the airbag 1, as shown in FIGS. A fixing bolt 62 inserted into the rectifying means 5 and the airbag 1 is provided. The bag ring 61 has an opening through which the inflator 2 can be inserted, and is a pressing plate that sandwiches the rectifying means 5 and the airbag 1 with the retainer 3. The fixing bolt 62 may be a separate part from the bag ring 61, or may be constituted by a leg portion standing on the outer periphery of the bag ring 61. For example, the fixing bolt 62 is inserted in the order of the bag ring 61, the rectifying means 5, the engagement piece 54, the airbag 1, and the retainer 3, and finally the nut is screwed to connect the rectifying means 5 and the airbag 1 to the retainer. Fix to 3. A reinforcing patch may be inserted between the bag ring 61 and the rectifying means 5 or between the airbag 1 and the retainer 3. Further, the engagement hole 54c of the engagement piece 54 may be formed to have a diameter slightly smaller than the diameter of the fixing bolt 62 in order to maintain the engaged state.

  Next, an assembling method of the rectifying means 5 will be described with reference to FIG. FIG. 3A is a component configuration diagram showing the airbag 1, the rectifying means 5, the reinforcing patch 13, and the bag ring 61 (fixing means 6) in order from the left. The reinforcing patch 13 is a panel formed in a substantially circular shape, and an inflator opening 13a through which the inflator 2 is inserted, and a part of the fixing means 6 (fixing bolt 62) disposed on the outer periphery of the inflator opening 13a. And a plurality of engaging holes 13b. The airbag 1 also has an inflator opening 14 and a plurality of engagement holes 15 arranged on the outer periphery of the inflator opening 14 and through which a part of the fixing means 6 (fixing bolts 62) is inserted.

  FIG. 3B shows the arrangement process of the rectifying means 5. Specifically, this is a step of inserting the rectifying means 5 into the airbag 1. At that time, the engaging piece 54 is arranged toward the side inflated and deployed on the occupant P side, the inflating openings 55 and 14 of the rectifying means 5 and the airbag 1 are aligned, and the rectifying means 5 and the airbag 1 The engagement holes 56 and 15 are made to coincide. Further, in such an arrangement step, the reinforcing patch 13 is inserted into the rectifying means 5, the inflator openings 13 a and 55 of the reinforcing patch 13 and the rectifying means 5 are aligned, and the engaging holes of the reinforcing patch 13 and the rectifying means 5 are aligned. 13b and 56 may be matched.

  FIG. 3C shows a bending process of the rectifying means 5. Specifically, the rectifying means 5 is bent so that the engagement piece 54 is positioned between the rectifying means 5 and the airbag 1. At that time, the engagement hole 54 c of the engagement piece 54 is bent so as to coincide with the engagement holes 56 and 15 of the rectifying means 5 and the airbag 1. At this time, the semi-annular portion 54 b of the engagement piece 54 is disposed along the outer periphery of the rectifying means 5 and the inflator openings 55 and 14 of the airbag 1 and is formed so as not to interfere with the inflator 2. Therefore, in the state of FIG. 3C, the airbag 1, the engagement piece 54, the rectifying means 5 (first panel 5 a), and the reinforcing patch 13 are laminated in this order from the bottom.

  FIG. 3D shows an engagement process of the rectifying means 5. Specifically, the fixing means 6 (bag ring 61 and fixing bolt 62) is disposed inside the rectifying means 5, and the fixing bolt 62 is inserted into the engagement holes 13b, 56, 54c, and 15. By this process, the engagement piece 54 is engaged with the fixing means 6 (fixing bolt 62), and the rectifying means 5 can be maintained in a bent state.

  Next, the operation of the rectifying means 5 will be described with reference to FIG. FIG. 4A shows a state before the rectifying means 5 is expanded and deployed. In addition, the figure of the rectification | straightening means 5 is abbreviate | omitted in FIG. 4 (A). The airbag 1 is contracted to a lateral width that can be accommodated in the retainer 3 by being bellow-folded from both sides in the lateral width direction toward the center from the state of FIG. Thereafter, the front end portion on the side that is inflated and deployed on the occupant P side is slightly folded and placed on the inflator 2. Further, the base end portion 11 side is folded and disposed thereon. Finally, the airbag 1 is wrapped by a wrapping sheet 16 that holds a folded shape. The wrapping sheet 16 is configured so that, for example, both end portions thereof are engaged with the fixing means 6 (fixing bolts 62), and is configured to be broken when the airbag 1 is inflated and deployed.

  FIG. 4B shows an initial state of expansion and deployment of the rectifying means 5. In FIG. 4B, the overall view of the airbag 1 is omitted, and only a part thereof is indicated by a one-dot chain line. In an emergency where the ECU senses or predicts a vehicle collision or sudden deceleration, gas is supplied from the inflator 2 to the rectifying means 5. At this time, since the rectifying means 5 is maintained in the bent state by the engagement piece 54, at least the first opening 51 is disposed inside the bent portion of the rectifying means 5. Therefore, as shown in FIG. 4B, in the initial state of inflation and deployment of the rectifying means 5, the amount of gas supplied from the rectifying means 5 to the airbag 1 is small, and the rectifying means 5 is rapidly inflated and deployed. An air chamber is configured. At this time, in the airbag cover 4, the door portion 43 is cleaved by the expansion force of the airbag 1 (rectifying means 5), and the airbag 1 (rectifying means 5) is released into the vehicle.

  FIG. 4C shows a completed state of expansion and deployment of the rectifying means 5. In FIG. 4C, the overall view of the airbag 1 is omitted, and only a part thereof is indicated by a one-dot chain line. When the internal pressure of the rectifying means 5 is increased from the state shown in FIG. 4B, the engagement piece 54 is broken. Then, as shown in FIG. 4C, the rectifying means 5 is inflated and deployed, and gas is quickly supplied to the airbag 1 from the first opening 51, the second opening 52, and the third opening 53. . At this time, the first opening 51 releases gas so as to press the airbag 1 against the instrument panel I, and the second opening 52 releases gas to the base end portion 11 of the airbag 1. The opening 53 releases gas so as to lift the airbag 1 upward.

  According to the airbag 1 described above, since the engaging piece 54 is disposed on the rectifying means 5, the rectifying means 5 can be folded and fixed to the fixing means 6, and the folded state of the rectifying means 5 can be stabilized. it can. Further, by allowing the rectifying means 5 to be bent and fixed, it is possible to suppress the outflow of gas from the opening (the first opening 51 to the third opening 53) when the rectifying means 5 is inflated and deployed. The rectifying means 5 can be quickly expanded and deployed, and the expansion control of the rectifying means 5 can be easily performed. Further, by engaging the engaging piece 54 with the fixing means 6 (bag ring 61 and fixing bolt 62) of the rectifying means 5, the folded state of the rectifying means 5 can be stabilized using existing parts.

  Further, by preventing the airbag 1 from coming into contact with the windshield W, the airbag 1 can be made independent without using a reaction force from the windshield W. In particular, by forming the first opening 51 and the second opening 52 in the rectifying means 5, the position of the airbag 1 can be stabilized by pressing the airbag 1 against the instrument panel I. The gas can be supplied to the base end portion 11 on the windshield W side to prevent the airbag 1 from being bent, and the airbag 1 can be easily made independent without using the reaction force from the windshield W. . Further, by forming the third opening 53 in the rectifying means 5, the airbag 1 can be easily lifted upward, and the airbag 1 can be quickly inflated and deployed to a position suitable for restraining the occupant. . In addition, by making the airbag 1 self-supporting, it is possible to make the parts of the airbag 1 and the airbag device common regardless of the installation angle of the windshield W and the vehicle type, and pull the airbag 1 and the airbag device. Cost reduction.

  Next, a modified example of the rectifying means 5 will be described. Here, FIG. 5 is a figure which shows the modification of the rectification | straightening means shown in FIG. 2, (A) is a 1st modification, (B) is a 2nd modification, (C) is a 3rd modification, (D) is a fourth modified example. In addition, in each figure, about the same component as the rectification | straightening means 5 shown in FIG. 2, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  In the first modification shown in FIG. 5A, the engagement piece 54 is also formed on the second panel 5b. With this configuration, the engagement piece 54 can be configured in a double manner, and the breaking strength of the engagement piece 54 can be increased. Such a configuration is effective, for example, when it is desired to break the engagement piece 54 with the internal pressure of the rectifying means 5 sufficiently high, or when the strength of the engagement piece 54 itself is low. Note that the engaging pieces 54 may be stitched together.

  In the second modification shown in FIG. 5B, an engagement piece 54 is formed on the second panel 5b. Even with this configuration, the same effect as the rectifying means 5 shown in FIG. 2 is obtained.

  In the third modified example shown in FIG. 5C, the third opening 53 is omitted. When the gas for inflating and deploying the airbag 1 can be sufficiently supplied by the first opening 51 and the second opening 52, the third opening 53 may be omitted. On the contrary, if the gas for inflating and deploying the airbag 1 is not sufficiently supplied by the first opening 51 and the second opening 52, a plurality of the third openings 53 may be formed although not shown. Good.

  In the fourth modified example shown in FIG. 5D, the second opening 52 is formed in the first panel 5a. Depending on the arrangement method of the airbag 1 on the instrument panel I, the first opening 51 and the second opening 52 can supply the gas to a predetermined position of the airbag 1 or the second panel 5a or the second opening 52. It is formed on one of the panels 5b.

  Next, a modified example of the engagement piece 54 will be described. Here, FIG. 6 is a figure which shows the modification of an engagement piece, (A) is a 1st modification, (B) is a 2nd modification, (C) is a 3rd modification, (D) is The fourth modification, (E) is the fifth modification, and (F) is the sixth modification. In addition, in each figure, about the same component as the engagement piece 54 shown in FIG. 2, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  In the first modification shown in FIG. 6A, the engaging piece 54 is formed in an annular shape. The engagement piece 54 has an inflator opening 54 e so as not to interfere with the inflator 2. The engagement pieces 54 have the same number of engagement holes 54 c as the fixing bolts 62 of the fixing means 6.

  The second modification shown in FIG. 6B has two engagement pieces 54 so that the two fixing bolts 62 arranged on the left and right of the fixing bolts 62 of the fixing means 6 can be engaged. Is formed at the end of the rectifying means 5. In this case, an engagement hole 54 c and a slit 54 d are formed in each engagement piece 54. In addition, when the width of the engagement piece 54 is sufficiently thin and can be broken without forming the slit 54d, the slit 54d may be omitted.

  In the third modified example shown in FIG. 6C, one engagement bolt 62 is provided so that it can be engaged with one fixing bolt 62 arranged closest to the fixing bolt 62 of the fixing means 6. The piece 54 is formed at the end of the rectifying means 5. The engagement piece 54 is formed with an engagement hole 54c and a slit 54d. In addition, when the width of the engagement piece 54 is sufficiently thin and can be broken without forming the slit 54d, the slit 54d may be omitted.

  In the fourth modification shown in FIG. 6D, a slit 54d is formed on the outer periphery of the engagement hole 54c in the engagement piece 54 shown in FIG. The outer periphery of the engagement hole 54c is a portion where the width of the fabric constituting the engagement piece 54 is narrow, and the engagement piece 54 can be easily broken by forming the slit 54d at this location. In addition, when the width of the outer periphery of the engagement hole 54c is sufficiently narrow and can be broken without forming the slit 54d, the slit 54d may be omitted.

  In the fifth modification shown in FIG. 6E, the engagement piece 54 shown in FIG. 2 has slits 54d formed with notches on both sides of the connection portion 54a.

  In the sixth modification shown in FIG. 6F, the engagement piece 54 is formed separately from the first panel 5a or the second panel 5b. The engaging piece 54 as a separate part has, for example, a substantially Y shape having a connecting portion 54a and a semi-annular portion 54b, and the end of the connecting portion 54a has a first panel 5a and a second panel 5b. When stitched, they are sandwiched between and stitched together. Moreover, you may make it connect the engagement piece 54 which is another components to the surface of the 1st panel 5a or the 2nd panel 5b by sewing separately.

  The first to sixth modifications of the engagement piece 54 described above have substantially the same effect as the engagement piece 54 shown in FIG. 2, and the capacity of the airbag 1, the gas pressure of the inflator 2, It can be arbitrarily selected and combined according to conditions such as the size and shape of the rectifying means 5 and the strength of the fabric of the engaging piece 54.

  Finally, another embodiment of the airbag 1 will be described. Here, FIG. 7 is a figure which shows 2nd embodiment of the airbag which concerns on this invention, (A) is a 1st panel, (B) is a 2nd panel, (C) is the bending process of an assembly method, Is shown. In addition, about the same component as the airbag 1 which concerns on 1st embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The first panel 5a shown in FIG. 7A has the same configuration as the first panel 5a in the first embodiment shown in FIG. On the other hand, the second panel 5b shown in FIG. 7B has a second engagement piece 58 disposed at the end of the first panel 5a opposite to the engagement piece 54. The second engagement piece 58 has the same configuration as the engagement piece 54 except for the arrangement location, and has, for example, an engagement hole 58c. By sewing the first panel 5a and the second panel 5b along the sewing line 57, the engaging piece 54 is arranged at one end of the rectifying means 5 and the second engaging piece 58 is arranged at the other end. It becomes.

  Therefore, as shown in FIG. 7C, the both ends of the rectifying means 5 are bent, and the engaging piece 54 and the second engaging piece 58 are engaged with the fixing means 6 (bag ring 61 and fixing bolt 62). In the initial stage of inflation and deployment, the flow rate of the gas flowing out into the airbag 1 can be suppressed with respect to both the first opening 51 and the second opening 52. Therefore, the rectifying means 5 can be inflated and deployed more quickly, and the gas can be supplied to the airbag 1 more quickly by breaking the engagement pieces 54 and the second engagement pieces 58.

  Here, the case where the engagement piece 54 is formed on the first panel 5 a and the second engagement piece 58 is formed on the second panel 5 b is illustrated, but the engagement piece 54 and the second engagement piece 58 are not illustrated. Both may be formed on either the first panel 5a or the second panel 5b, or the engagement piece 54 is formed on the second panel 5b and the second engagement piece 58 is formed on the first panel 5a. You may make it do.

  As an embodiment of the airbag apparatus according to the present invention, a passenger seat airbag apparatus has been described as an example. However, the present invention uses the reaction force of the windshield W (including the windshield and rear glass) to create the airbag 1. The present invention can also be applied to an airbag device that has been inflated and deployed, such as a driver seat airbag device, a rear seat airbag device, and the like.

  The present invention is not limited to the above-described embodiment, and the first modification to the sixth modification of the engagement piece 54 can be applied to the second engagement piece 58 and the like without departing from the spirit of the present invention. Of course, various modifications are possible.

DESCRIPTION OF SYMBOLS 1 ... Airbag 2 ... Inflator 3 ... Retainer 4 ... Airbag cover 5 ... Rectification means 5a ... First panel 5b ... Second panel 6 ... Fixing means 7 ... Car interior structure 11 ... Base end part 12 ... Vent hole 13 ... Reinforcement Patches 13a, 14, 54e, 55 ... inflator openings 13b, 15, 54c, 56 ... engagement holes 16 ... wrapping sheet 31 ... hook 41 ... plate-like part 42 ... inner case 43 ... door part 51 ... first opening part 52 ... Second opening 53 ... Third opening 54 ... Engagement piece 54a ... Connection portion 54b ... Semi-annular part 54d ... Slit 57 ... Suture line 58 ... Second engagement piece 61 ... Bag ring 62 ... Fixing bolt

Claims (9)

It is an airbag that is normally folded and built into the instrument panel, and inflated between the windshield and the occupant when gas is supplied in an emergency,
A rectifying means disposed inside the airbag for controlling the flow of the gas;
The rectifying means includes an opening for supplying the gas to the airbag, and an engagement piece disposed in the vicinity of the opening,
The airbag according to claim 1, wherein the engagement piece is configured to be engageable with a fixing unit of the rectifying unit and to be ruptured when the rectifying unit is inflated and deployed.   The fixing means is a bag ring that fixes the rectifying means and the airbag to a retainer that accommodates the airbag, and the bag ring includes a fixing bolt inserted through the rectifying means and the airbag. The airbag according to claim 1.   The airbag according to claim 2, wherein the fixing bolt is inserted in the order of the rectifying means, the engagement piece, and the airbag.   The rectifying means is composed of a first panel fixed by the fixing means, and a second panel connected to the first panel, and the engaging piece is the first panel or the second panel. 2. The airbag according to claim 1, wherein the airbag is formed integrally, or is formed and sewn separately from the first panel or the second panel.   The airbag according to claim 1, wherein the engagement piece is formed in a shape that does not interfere with an inflator that supplies the gas to the airbag.   The airbag according to claim 1, wherein the airbag is inflated and deployed so as not to contact the windshield.   The opening includes a first opening for supplying the gas so as to press a portion of the airbag on the occupant side against the instrument panel, and a gas at a base end of the airbag on the windshield side. The airbag according to claim 6, further comprising a second opening to be supplied, wherein the engagement piece is disposed at an end of the first opening or the second opening. .   The airbag according to claim 7, wherein the opening includes a third opening that supplies the gas so as to lift the airbag upward. An airbag that is normally folded and inflated and deployed in an emergency, an inflator that supplies gas to the airbag, a retainer that fixes the airbag and the inflator, and an airbag cover that covers the airbag In an airbag device having
The said airbag is an airbag described in any one of Claims 1-8, The airbag apparatus characterized by the above-mentioned.