JP5804967B2 - Air bag and air bag device - Google Patents

Description

  The present invention relates to an airbag and an airbag apparatus, and more particularly to an airbag and an airbag apparatus that can relax design conditions.

  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. There has also been proposed an airbag in which a rectifying means such as an inner bag or a diffuser is disposed inside the airbag (see, for example, Patent Document 1 and Patent Document 2).

  For example, an airbag described in Patent Document 1 includes an inner bag that is held between a windshield (front glass) and an instrument panel, and an airbag formed in the inner bag in the vertical direction. It has a baffle means provided with a blowout hole that promotes deployment.

  Moreover, the airbag described in Patent Document 2 includes an inner bag formed in a small bag that does not fly to the rear of the vehicle beyond the rear end of the instrument panel, an upper hole formed in the inner bag, and A lower hole, and the upper hole is provided in a portion that bulges rearward of the vehicle beyond the opened door end, and the lower hole is a portion that bulges beyond the opening of the instrument panel. The rectifying means is provided.

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

  In the airbag apparatus described in Patent Document 1 and Patent Document 2 described above, rectifying means such as an inner bag and a diffuser are arranged inside the airbag in order to control the deployment direction and deployment behavior of the airbag. . In addition, in the airbag apparatus, in general, in order to control the deployment direction and the deployment behavior of the airbag, the shape of the airbag, the arrangement of the tether, the arrangement of the inflator, the balance between the gas supply amount and the exhaust amount, It is necessary to design and adjust the shape of the airbag cover. Therefore, the design of the airbag device tends to be complicated and complicated, and the time and labor required for the design are great.

  The present invention was devised in view of such problems, and provides an airbag and an airbag apparatus that can relax the design conditions of the airbag apparatus and can reduce the time and effort required for the design. For the purpose.

  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. A lower surface patch cloth disposed on a lower surface portion; an upper surface patch cloth disposed on an upper surface portion of the airbag; and a side surface patch cloth disposed on a side surface portion of the airbag. There is provided an airbag characterized in that the entire outer periphery of the front portion of the airbag is covered with an upper surface patch cloth and the side surface patch cloth.

  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 And an airbag cover connected to the instrument panel and accommodating the bag, the airbag is normally folded and built in the instrument panel, and the gas is stored in an emergency. An airbag that is supplied and inflated and deployed between a windshield and an occupant, wherein the lower surface patch cloth is disposed on the lower surface portion of the airbag, and the upper surface patch cloth is disposed on the upper surface portion of the airbag. A side surface patch cloth disposed on a side surface portion of the airbag, and the lower surface patch cloth, Wherein the surface patch cloth and the side surface patch cloth coated with an outer peripheral entire forward portion of the air bag, the air bag device is provided, characterized in that.

  Further, the side patch cloth may be disposed from the front end portion of the airbag to a position beyond the rear end portion of the opening that discharges the airbag in the state where the airbag has been inflated. You may arrange | position to the position beyond the rear-end part of the airbag cover provided with the said airbag, and may be arrange | positioned to the position beyond the rear-end part of the said instrument panel.

  Further, the side surface patch cloth may be disposed at least partially from the front end portion of the airbag to a position that is at least half of the total length of the airbag when the airbag is inflated.

  Further, the side surface patch cloth may be arranged so that the upper surface portion side is located behind the lower surface portion side when the airbag is inflated.

  Further, the lower surface patch cloth and the upper surface patch cloth may be arranged to a position behind the side surface patch cloth.

  Moreover, you may have the rectification | straightening means arrange | positioned inside the said airbag and controlling the flow of the said gas.

  Further, the airbag may be configured to have a certain gap with the windshield in a state where the airbag has been inflated.

  According to the airbag and the airbag apparatus according to the present invention described above, the patch cloth is disposed on the entire outer periphery (that is, the lower surface, the upper surface, and the side surface) of the front portion of the airbag, thereby improving the rigidity of the front portion of the airbag. It can be increased, can function as a guide when the airbag is inflated and deployed, and can support control of the deployment direction and deployment behavior of the airbag. Therefore, design conditions can be relaxed for designing the shape of the airbag, tether placement, inflator placement, balance between gas supply and exhaust, airbag cover shape, rectifier structure, etc. The time and labor required can be reduced.

  Further, by arranging the side patch panel from the airbag front end to a range exceeding a predetermined position (opening rear end, airbag cover rear end, instrument panel rear end or half of the total length of the airbag), The arrangement range of the side patch panel can be easily set according to the characteristics of various airbag devices while effectively supporting the control of the deployment direction and the deployment behavior of the airbag.

  In addition, by arranging the upper surface of the side patch cloth to the rear of the lower surface, it is possible to increase the rigidity of the upper surface of the airbag, which is prone to load due to inertia, and effectively deploy the airbag. It can support control of direction and deployment behavior.

  Further, by arranging the lower surface patch cloth and the upper surface patch cloth to a position behind the side surface patch cloth, the rigidity of the lower surface part and the upper surface part of the airbag can be easily increased. The side patch cloth can be developed in a plane between the two, making it easy to function as a guide.

  Further, even when the rectifying means is arranged in the airbag, the rigidity of the front portion of the airbag is increased, so that the control of the rectifying means and the deployment direction and the behavior of the airbag can be supported. The design conditions of the means can be relaxed.

  Moreover, even when the airbag is a self-supporting airbag, it is possible to support the control of the airbag deployment direction and deployment behavior by increasing the rigidity of the front portion of the airbag. The design conditions of the component parts can be relaxed, and the time and labor required for the design can be reduced.

1 is an overall configuration diagram showing an airbag device according to a first embodiment of the present invention. It is a figure which shows the airbag shown in FIG. 1, (A) is a bottom view, (B) is a side view, (C) is a top view. It is a figure which shows an example of an effect | action of the airbag apparatus which concerns on this embodiment, (A) is 1st embodiment, (B) has shown the modification. It is a figure which shows the airbag apparatus which concerns on other embodiment of this invention, (A) has shown 2nd embodiment, (B) has shown 3rd embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is an overall configuration diagram showing the airbag apparatus according to the first embodiment of the present invention. 2 is a view showing the airbag shown in FIG. 1, in which (A) is a bottom view, (B) is a side view, and (C) is a top view. For convenience of explanation, FIG. 1 illustrates a state in which a part of the airbag device (the base portion of the airbag 1) is cut away.

  As shown in FIGS. 1 and 2, the airbag device according to the first embodiment of the present invention is folded in a normal state and is inflated and deployed in an emergency, and supplies gas to the airbag 1. The inflator 2, the retainer 3 that fixes the airbag 1 and the inflator 2, and the airbag cover 4 that accommodates the airbag 1 and is connected to the instrument panel I. The airbag 1 is normally used. An airbag that is folded and built into the instrument panel I and is inflated and deployed between the windshield W (windshield) and the occupant P when gas is supplied in an emergency, and is disposed inside the airbag 1 The rectifying means 5 for controlling the gas flow, the lower surface patch cloth 11 disposed on the lower surface portion of the airbag 1, and the upper surface disposed on the upper surface portion of the airbag 1. A patch cloth 12 and a side patch cloth 13 disposed on a side surface portion of the airbag 1, and the lower surface patch cloth 11, the upper surface patch cloth 12 and the side surface patch cloth 13 cover the entire outer periphery of the front portion of the airbag 1. It is coated. In the present embodiment, “front” means the front side in the vehicle front-rear direction, and “rear” means the rear side in the vehicle front-rear direction.

  The airbag device shown in FIG. 1 is a so-called passenger seat airbag device. The airbag 1 is, for example, a windshield 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 contact the shield W. In other words, the airbag 1 according to the first embodiment of the present invention is configured to have a certain gap C with the windshield W in the inflated state, without using the reaction force from the windshield W. It is configured to be independent. The airbag 1 may be formed with a vent hole 14 that exhausts gas in the airbag 1 and absorbs an impact when the occupant P contacts the airbag 1.

  Here, “the airbag 1 is self-supporting” is not limited to the case where the airbag 1 after inflated and deployed has a certain gap C with the windshield W, as shown in the figure. Even when the windshield W is in contact with the windshield W, the reaction force from the windshield W is small and the airbag 1 is substantially independent.

  Further, FIG. 1 shows a state after the airbag 1 is inflated and deployed, but the surface of the airbag cover 4 forms a part of the instrument panel I before the airbag 1 is inflated and deployed. doing. Further, as shown in FIG. 1, 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 portion 43 is formed on the plate-like 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 is fixed to the retainer 3 by fixing means such as a bag ring. 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.

  The retainer 3 is locked to a locking hole formed in the inner case 42 by, for example, a hook connected to the side surface portion, and is connected to the vehicle interior structure 6 via a joining member. 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.

  The rectifying means 5 has a bag structure that can be inflated and deployed inside the airbag 1, and in the inflated state, a first opening 51 that discharges gas toward the lower rear side of the airbag 1; A second opening 52 for releasing gas toward the upper rear side of the airbag 1 and a third opening 53 for discharging gas toward the front of the airbag 1 are provided. And the 1st opening part 51 has a function which presses the lower surface part of the back side of the airbag 1 against the instrument panel I with the discharge | released gas, and the 2nd opening part 52 is the airbag 1 with the discharge | released gas. The third opening 53 has a function of holding the internal pressure of the root portion on the front side of the airbag 1 by the released gas.

  The shape of the rectifying means 5 and the arrangement of the openings are not limited to those shown in the figure, and other rectifying means 5 may be used as long as they have the three functions described above. Moreover, when the airbag 1 is not a self-supporting type, the rectification | straightening means of another structure may be used and you may make it abbreviate | omit as needed.

  Here, the airbag 1 shown in FIG. 2 illustrates a state where the airbag 1 is removed from the airbag apparatus shown in FIG. 1 and inflated and deployed. Therefore, the inflated and deployed shape of the lower surface portion of the airbag 1 is not constrained by the airbag cover 4 and has a shape different from that shown in FIG.

  The airbag 1 includes, for example, a center panel 1a that forms a central portion, and a pair of side panels 1b that are sewn to both sides of the center panel 1a. The center panel 1a and the side panel 1b are joined by the stitching portion 1c, and both ends of the center panel 1a are joined by the stitching portion 1d, thereby forming a bag body. 2A to 2C, the lower surface patch cloth 11, the upper surface patch cloth 12, and the side surface patch cloth 13 are shown in a painted state for convenience of explanation. In addition, the panel structure which forms the bag body of the airbag 1 is not limited to what was illustrated, The panel structure used conventionally can be used.

  As shown in the bottom view of FIG. 2A, the lower surface patch cloth 11 is disposed on the lower surface portion of the center panel 1a. Both sides of the lower surface patch cloth 11 are joined to the airbag 1 by a stitching portion 1c, a front end portion is joined to the airbag 1 by a stitching portion 1d, and a rear end portion is joined to the center panel 1a by a stitching portion 1e. . Further, an inflator opening 15 through which the inflator 2 is inserted is formed in the lower surface portion of the airbag 1 and the lower surface patch cloth 11. In addition, tabs 16 for alignment are formed at both ends of the center panel 1a. The tabs 16 are overlapped and fixed with pins so that the airbag 1 is fixed and predetermined sewing is performed. It is configured.

  As shown in the side view of FIG. 2B, the side patch cloth 13 is disposed on the side panel 1b. The side patch cloth 13 is joined to the airbag 1 by the stitching portion 1c as shown in FIGS. 2A and 2C, and as shown in FIGS. 2A to 2C. The end side is joined to the side panel 1b by the stitched portion 1f.

  As shown in the top view of FIG. 2C, the upper surface patch cloth 12 is disposed on the upper surface portion of the center panel 1a. Both sides of the upper surface patch cloth 12 are joined to the airbag 1 by a stitching portion 1c, a front end portion is joined to the airbag 1 by a stitching portion 1d, and a rear end portion is joined to the center panel 1a by a stitching portion 1g. .

  By the way, when the airbag 1 is folded, the airbag 1 can be accommodated in the airbag cover 4 after being flattened by crushing the airbag 1 from above with the lower surface portion of the airbag 1 being directed to the flat plate member. It is folded in the width direction and the front-rear direction. The folded airbag 1 is generally disposed on the outside of the folded airbag 1 at a portion close to the inflator 2 (that is, the front portion of the airbag 1), and is a portion far from the inflator 2 (that is, the airbag). 1 is often disposed inside the folded airbag 1. Therefore, in the initial stage of inflation and deployment of the airbag 1, when the rectifying means 5 is inflated, the front portion of the airbag 1 is in contact with the rectifying means 5.

  Therefore, as described above, the lower surface patch cloth 11, the upper surface patch cloth 12, and the side surface patch cloth 13 are arranged on the airbag 1 to cover the entire outer periphery of the front portion of the airbag 1, thereby The rigidity of the portion can be increased, the control of the deployment direction and the deployment behavior of the rectifying means 5 and the airbag 1 can be supported, and the design conditions of the rectifying means 5 and the airbag 1 can be relaxed. Note that the lower surface patch cloth 11, the upper surface patch cloth 12, and the side surface patch cloth 13 are made of the same material as the base fabric (center panel 1a and side panel 1b) constituting the airbag 1, for example.

  Further, as shown in FIGS. 2A and 2C, the lower surface patch cloth 11 and the upper surface patch cloth 12 are arranged to a position behind the side surface patch cloth 13. With such a configuration, the rigidity of the lower surface portion and the upper surface portion of the airbag 1 can be easily increased, and the side surface patch cloth 13 can be deployed in a plane between the lower surface patch cloth 11 and the upper surface patch cloth 12, It can be made easy to function as a guide.

  Further, as shown in FIG. 1, the side surface patch cloth 13 has at least the rear end portion (line X1) of the opening portion that discharges the airbag 1 from the front end portion Q of the airbag 1 when the airbag 1 is inflated. -X1) is disposed to a position exceeding, and preferably disposed to a position exceeding the rear end portion (line X2-X2) of the airbag cover 4 provided with the airbag 1. Here, the rear end portion of the opening that is the starting point of the line X1-X1 and the rear end portion of the airbag cover 4 that is the starting point of the line X2-X2 are end portions on the center cross section of the airbag in the vehicle longitudinal direction. Yes, line X1-X1 and line X2-X2 shall be pulled perpendicularly to the instrument panel I from each rear end.

  In FIG. 1, an airbag device of a type in which the airbag cover 4 is fitted into the instrument panel I is illustrated, but when the instrument panel I and the airbag cover 4 are integrally formed, the side surface The arrangement range of the patch cloth 13 is defined by the lines X1-X1.

  By disposing the side patch cloth 13 to a position beyond the line X1-X1, the front portion of the airbag 1 can be reinforced while minimizing the base fabric amount of the side patch cloth 13, and the airbag. 1 can be increased in rigidity. Moreover, when the location which wants to reinforce by the shape of the airbag 1 and the rectification | straightening means 5, or a folding method over a wide range, the side surface patch cloth 13 should just be arrange | positioned to the position beyond line X2-X2. Thus, by adjusting the arrangement range of the side patch cloth 13 according to the characteristics of the airbag 1, the design of the airbag 1 and the rectifying means 5 can be effectively supported while controlling the deployment direction and the deployment behavior. Time and labor required can also be reduced.

  In FIG. 1, the rear end portion (sewn portion 1 f) of the side surface patch cloth 13 intersects the line X <b> 1-X <b> 1 or the line X <b> 2-X <b> 2 (the upper surface portion side approaches the line X <b> 2-X <b> 2 and the lower surface portion side is the line X <b> 2-2. However, it may be formed in parallel with the line X1-X1 or the line X2-X2, or the upper surface side is separated from the line X2-X2 and the lower surface side is the line X2-X2. It may be formed in a direction approaching.

  Here, FIG. 3 is a figure which shows an example of an effect | action of the airbag apparatus which concerns on this embodiment, (A) is 1st embodiment, (B) has shown the modification. Moreover, each figure of FIG. 3 has shown the state which the expansion | deployment deployment of the airbags 1 and 10 was completed. 3 shows a state in which a part of the airbag device is cut out in the same manner as in FIG. 1, but the broken line is omitted for convenience of explanation.

  As shown in FIG. 3A, in the airbag 1 according to this embodiment having the above-described lower surface patch cloth 11, upper surface patch cloth 12, and side surface patch cloth 13, the front portion of the airbag 1 is reinforced. Since the rigidity of the front part of the airbag 1 is higher than that of other parts (for example, the rear part), the airbag 1 can function as a guide when the airbag 1 is inflated and deployed. It is possible to support control of one deployment direction and deployment behavior. Therefore, as illustrated by the arrows, the airbag 1 can be easily inflated and deployed toward the passenger P.

  As shown in the figure, in the case of the self-supporting airbag 1, it is important to press the airbag 1 against the instrument panel I. By increasing the rigidity of the front portion of the airbag 1, Control of the deployment direction and the deployment behavior of the airbag 1 can be supported, and the airbag 1 can be inflated and deployed downward as shown by the arrows.

  Thus, by increasing the rigidity of the front portion of the airbag 1, it is possible to support the control of the deployment direction and deployment behavior of the airbag 1, and the shape of the airbag 1, the arrangement of the tether, the arrangement of the inflator 2, With respect to the balance between the gas supply amount and the exhaust amount, the shape of the airbag cover 4, the structure of the rectifying means 5, etc., the design conditions can be relaxed, and the time and labor required for the design can be reduced.

  Moreover, in the airbag 1 which concerns on 1st embodiment mentioned above, since the side surface patch cross 13 is arrange | positioned to the position back from the lower surface part side in the inflation completion state of the airbag 1, it is inertial. It is possible to effectively increase the rigidity of the upper surface portion of the airbag 1 that is likely to be loaded by force.

  In the modification shown in FIG. 3B, the lower surface patch cloth 11, the upper surface patch cloth 12, and the side surface patch cloth 13 described above are arranged in the airbag 10 in a normal airbag device using the reaction force of the windshield W. It is a thing. Even with such a configuration, the rigidity of the front portion of the airbag 10 can be increased, it can function as a guide when the airbag 10 is inflated and deployed, and control of the deployment direction and behavior of the airbag 10 is supported. can do. Therefore, as illustrated by the arrows, the airbag 10 can be easily inflated and deployed toward the passenger P.

  Also in this modified example, design conditions are eased with respect to the shape of the airbag 10, the arrangement of the tether, the arrangement of the inflator 2, the balance between the gas supply amount and the exhaust amount, the structure of the shape of the airbag cover 4, and the like. It is possible to reduce the time and labor required for designing. In addition, although the rectification | straightening means is not illustrated in FIG.3 (B), the airbag 10 may have a rectification | straightening means and does not need to have it.

  Next, an airbag apparatus according to another embodiment of the present invention will be described with reference to FIG. Here, FIG. 4 is a figure which shows the airbag apparatus which concerns on other embodiment of this invention, (A) has shown 2nd embodiment, (B) has shown 3rd embodiment. 4A and 4B illustrate a state in which a part of the airbag device is cut out as in FIG. 1, but the broken line is omitted for convenience of description. Moreover, about the same component as the airbag apparatus which concerns on 1st embodiment shown in FIG. 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  In the second embodiment shown in FIG. 4 (A), the side patch cloth 13 is at least a part of the total length L of the airbag 1 from the front end Q of the airbag 1 when the airbag 1 is in an inflated state. It is arranged to the position of. Here, the total length L of the airbag 1 means the length of the airbag 1 in the vehicle front-rear direction. The illustrated airbag 1 is configured such that the upper surface portion side of the side surface patch cloth 13 has a length of L / 2 or more from the front end portion Q, but the lower surface portion side and the middle portion of the side surface patch cloth 13 are front end portions. It may have a length of L / 2 or more from Q, or may be configured such that the rear end portion (sewn portion 1f) of the side surface patch cloth 13 matches the length of L / 2.

  As described above, by setting the arrangement range of the side patch cloth 13 with reference to the total length L of the airbag 1, for example, when the rear end of the opening or the rear end of the airbag cover cannot be set as a reference, setting is difficult. Even in such a case, the arrangement range of the side surface patch cloth 13 can be easily set.

  In the third embodiment shown in FIG. 4 (B), the side surface patch cloth 13 is disposed up to a position beyond the rear end portion (line X3-X3) of the instrument panel I when the airbag 1 is inflated. It is what. Here, the rear end portion of the instrument panel I, which is the starting point of the line X3-X3, is an end portion on the center cross section of the airbag in the vehicle longitudinal direction, and the line X3-X3 is the rear end portion of the instrument panel I. It shall be pulled vertically from the part. When the line X1-X1 or the line X2-X2 shown in the airbag device according to the first embodiment is insufficient, or when the airbag cover 4 and the instrument panel I are integrally formed, the line X3- You may make it set the arrangement | positioning range of the side surface patch cloth 13 on the basis of X3.

  The illustrated airbag 1 is configured such that the upper surface side of the side patch cloth 13 is separated from the line X3-X3 and the lower surface side approaches the line X3-X3, but the lower surface side of the side patch cloth 13 is the line X3. -It may be configured to be separated from X3 and the upper surface side may be close to the line X3-X3, or the rear end portion (stitched portion 1f) of the side surface patch cloth 13 is configured to be parallel to the line X3-X3. May be.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1,10 Airbag 1a Center panel 1b Side panel 1c-1g Sewing part 2 Inflator 3 Retainer 4 Airbag cover 5 Rectification means 6 In-vehicle structure 11 Lower surface patch cloth 12 Upper surface patch cloth 13 Side patch cloth 14 Vent hole 15 Inflator opening Part 16 Tab 41 Plate-like part 42 Inner case 43 Door part 51 First opening part 52 Second opening part 53 Third opening part

Claims (8)

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 lower surface patch cloth disposed on the lower surface of the airbag;
An upper surface patch cloth disposed on the upper surface of the airbag;
A side patch cloth disposed on a side portion of the airbag,
The entire outer periphery of the front portion of the airbag is covered with the lower surface patch cloth, the upper surface patch cloth, and the side surface patch cloth,
An airbag characterized by that.   The side patch cloth is located at a position beyond the rear end of the opening that discharges the airbag from the front end of the airbag in a state where the airbag has been inflated, and an airbag cover provided with the airbag. The airbag according to claim 1, wherein the airbag is disposed up to a position beyond a rear end portion or a position beyond a rear end portion of the instrument panel.   2. The side patch cloth, wherein at least a part of the side patch cloth from the front end portion of the airbag is disposed to a position that is at least half of the total length of the airbag when the airbag is inflated. The airbag described in 1.   2. The airbag according to claim 1, wherein the side surface patch cloth is disposed so that the upper surface portion side is located behind the lower surface portion side when the airbag is inflated.   The airbag according to claim 1, wherein the lower surface patch cloth and the upper surface patch cloth are arranged to a position behind the side surface patch cloth.   The airbag according to claim 1, further comprising a rectifying unit that is disposed inside the airbag and controls a flow of the gas.   2. The airbag according to claim 1, wherein the airbag is configured to have a certain gap with the windshield when the airbag is inflated. 3. 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 accommodates the airbag and an instrument panel In an airbag device having an airbag cover connected to
The said airbag is an airbag described in any one of Claims 1-7, The airbag apparatus characterized by the above-mentioned.