JP2013071704A - Air bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air bag capable of suppressing the volume of an air bag body part and capable of properly protecting each region of an occupant's body.SOLUTION: An intermediate part 26 is positioned between a base 25, which is to be attached to a vehicle body, of the baggy air bag body part 18 and a tip part 27 for protecting the upper bodies B1 and B2 of the occupants P1 and P2. The intermediate part 26 is isolated ahead of the tip part 27. The volume of the baggy air bag body part 18 can be suppressed. Each region of the bodies of the occupants P1 and P2 can be properly protected by protecting the heads H1 and H2 of the occupants P1 and P2 without pressing them with the intermediate part 26, while reliably protecting the upper bodies B1 and B2 of the occupants P1 and P2 with the tip part 27.

Description

  The present invention relates to an airbag provided with a bag-shaped airbag main body portion that is positioned on an upper portion of a vehicle compartment of a vehicle and attached to a vehicle body.

  In recent years, in a vehicle such as an automobile, the height of the instrument panel portion may be relatively lowered in order to make the vehicle compartment wider. In such a case, for example, it is not easy to sufficiently take the storage space of the airbag for the passenger seat in the instrument panel portion. Therefore, by storing the airbag in the ceiling (roof portion) of the vehicle, for example, A configuration in which a storage space is secured is known. In this configuration, in the event of a car collision, the inflation gas is supplied from the inflator so that the airbag main body is inflated and deployed downward from the ceiling in front of the occupant so as to alleviate the impact applied to the occupant. (For example, refer to Patent Document 1).

Japanese translation of PCT publication No. 2002-534321 (page 17-22, FIG. 2-5)

  However, since the airbag described above is deployed from the ceiling to a position facing the front of the occupant, it is not easy to suppress the capacity of the airbag main body, and the upper body of the occupant is reliably restrained. There is a problem that, for example, when it is unfolded, it may be too close to the head of the passenger.

  This invention is made in view of such a point, and it aims at providing the airbag which can suppress the capacity | capacitance of an airbag main-body part and can protect each part of a passenger | crew appropriately.

  The airbag according to claim 1 is located at the upper part of the vehicle compartment of the vehicle and is attached to the vehicle body. The airbag is inflated and deployed downward by supply of inflation gas, and has a bag-like airbag body portion located in front of the occupant. The airbag main body part is provided between the base part attached to the vehicle body, a tip part that protects the upper body of the occupant in the deployed state, and the base part and the tip part. And an intermediate portion facing the occupant's head at a position spaced forward from the tip in the state.

  The airbag according to claim 2 is the airbag according to claim 1, wherein the intermediate portion is provided at a facing portion facing the front of the head of the occupant in a deployed state, and a side portion of the facing portion. And a side portion closer to the occupant side.

  The airbag according to claim 3 is the airbag according to claim 2, wherein the side portion is provided in a panel shape.

  The airbag according to claim 4 is the airbag according to claim 2, wherein the side portion is an air chamber.

  The airbag according to claim 5 is the airbag according to any one of claims 1 to 4, further comprising a top plate portion positioned above the tip portion, and the intermediate portion upwards in front of the top plate portion. It is the one that protrudes.

  The airbag according to claim 6 is the airbag according to claim 5, and includes a lower plate portion positioned below the base portion, and the intermediate portion includes a side portion positioned on both sides, and at least a part of the top plate portion, It is surrounded by the lower plate part and the side part, and has a recessed part into which the occupant's head can be inserted in the unfolded state.

  According to the airbag of the first aspect, the intermediate portion located between the base portion attached to the vehicle body of the bag-shaped airbag main body portion and the tip portion protecting the upper body of the occupant is forward of the tip portion. By separating, the capacity of the airbag main body can be suppressed, and the upper part of the occupant is securely protected by the tip part, while the occupant's head is protected without being compressed at the intermediate part, etc. Can protect properly.

  According to the airbag according to claim 2, in addition to the effect of the airbag according to claim 1, the side portion is provided with a side portion closer to the occupant side than the facing portion on the side portion of the facing portion. Thus, the position of the head of the occupant can be regulated, and the head can be prevented from being greatly displaced laterally with respect to the airbag body.

  According to the airbag of the third aspect, in addition to the effect of the airbag of the second aspect, the side portion can be formed more easily by making the side portion into a panel shape.

  According to the airbag of the fourth aspect, in addition to the effect of the airbag of the second aspect, by making the side part an air chamber, the cushioning property of the side part can be further improved, and the head of the occupant is more appropriate. Can be protected.

  According to the airbag of the fifth aspect, in addition to the effect of the airbag according to any one of the first to fourth aspects, the intermediate portion protrudes upward in front of the top plate portion positioned above the tip portion. Thereby, the intermediate part which opposes a passenger | crew's head can be easily formed in the position spaced apart ahead of the front-end | tip part with respect to the passenger | crew in the unfolded state.

  According to the airbag of the sixth aspect, in addition to the effect of the airbag of the fifth aspect, the intermediate plate has at least a part of the top plate portion located above the tip portion and the lower plate located below the base portion. And a recess that can be inserted into the occupant's head in the unfolded state by being surrounded by the side portions located on both sides, the occupant's head inserted in the recess can be in a state of being surrounded from the top, bottom, left, and right It is possible to make the occupant's head difficult to shift in any direction with respect to the airbag body.

It is a perspective view of the state where the airbag which shows a 1st embodiment of the airbag of the present invention was inflated and developed. It is a perspective view of an airbag same as the above. It is a disassembled perspective view of an airbag same as the above. It is a perspective view which shows 2nd Embodiment of the airbag of this invention. It is a disassembled perspective view of an airbag same as the above. It is a front view which shows typically the passenger | crew's restraint state by an airbag same as the above. It is a disassembled perspective view which shows 3rd Embodiment of the airbag of this invention. It is a perspective view of the state which the airbag which shows 4th Embodiment of the airbag of this invention inflate-deployed. It is a perspective view which shows an airbag same as the above from the passenger | crew side. It is a perspective view which shows an airbag same as the above from the passenger side. It is sectional drawing of an airbag same as the above. The passenger | crew restraint state by an airbag same as the above is shown typically, (a) is the side view, (b) is the perspective view.

  Hereinafter, a first embodiment of an airbag of the present invention will be described with reference to the drawings.

  1 to 3, reference numeral 10 denotes an airbag device, which is an instrument positioned in front of passengers P1 and P2 as objects to be protected of, for example, a passenger seat of an automobile as a moving vehicle. An airbag device 10 for a passenger on the passenger seat is arranged on the inside of a roof portion 13 as an installation portion located above the panel portion 11 via a windshield 12 that is a windshield. Hereinafter, the front-rear direction, the both-side direction, and the up-down direction will be described based on the straight-ahead direction of the automobile with the airbag device 10 attached to the automobile. In each figure, occupants P1 and P2 are indicated by dummies, occupant P1 is indicated by a dummy imitating a relatively small female occupant (AF05), and occupant P2 represents a relatively large male occupant. This is indicated by a dummy (AM50) imitating.

  The airbag device 10 can also be called an airbag module. For example, the airbag device 10 is an airbag that is a bag-shaped (box-shaped) outer shell portion formed of a plurality of base fabrics 15, 16, and 17 such as nylon fabric. An airbag 19 having a bag body 18 and the like, an inflator 20 for supplying gas to the airbag body 18, an attachment member (not shown) that holds the airbag 19 and the inflator 20 and is attached to the vehicle body side, and the inflator 20 And a control means (not shown) for controlling the operation. Furthermore, the airbag device 10 is attached to a roof portion 13 that constitutes a ceiling that is an upper portion of a vehicle compartment 21 of an automobile, and is electrically connected to a control device that includes a sensor and the like.

  The mounting member is formed in a substantially box shape, the lower side is a rectangular projecting opening that is an opening, and the inner side is an airbag storage portion that stores the folded airbag body 18 (airbag 19). Yes. The attachment member is covered with an interior panel (not shown) which is an interior member on the vehicle body side in a normal state in which the airbag 19 is housed.

  The inflator 20 includes a main body formed, for example, in a columnar shape, and the main body is disposed inside the airbag main body 18.

  The airbag body portion 18 is formed into a bag shape as a whole by joining a plurality of base fabrics 15, 16, 17 by sewing, bonding or welding, and is attached to the roof portion 13 to attach the inflator 20 A base portion 25 to be accommodated on the inner side is provided at the upper end portion, and in an expanded state, an intermediate portion 26 that extends downward from the base portion 25 and faces the heads H1, H2 of the occupants P1, P2 is continuous. Extending rearward and downward from the middle part 26, facing the upper body B1, B2 of the occupants P1, P2, that is, the part including the abdominal parts A1, A2, chest parts C1, C2 and both shoulder parts S1, S2 except for the head parts H1, H2. The leading end 27 is continuous. Further, the intermediate part 26 is separated from the front end part 27 in front of the occupants P1 and P2. That is, the intermediate portion 26 is biased toward the front side of the airbag main body portion 18. For this reason, the airbag main body 18 has a substantially U-shape (insulator-shaped) in a side view in which the occupants P1 and P2 sides are recessed concavely toward the front side at the position of the intermediate portion 26. In other words, the airbag main body portion 18 is formed with a concave space portion 28 behind the intermediate portion 26.

  The airbag body 18 protects the upper bodies B1, B2 of the occupants P1, P2 by applying a reaction force to the upper bodies B1, B2 of the occupants P1, P2 that have moved forward by the front end portion 27. At the same time, the intermediate part 26 protects the heads H1, H2 of the occupants P1, P2 with a reaction force smaller than that of the upper bodies B1, B2 against the heads H1, H2 of the occupants P1, P2 moving forward. It is configured as follows.

  Here, the base fabric 15 is also called a center panel or the like, and is integrally formed in a band shape, and both ends thereof are joined so as to have a cylindrical shape having openings 31 and 32 opened on both left and right sides. The base fabric 15 extends along the vertical direction and forms the rear surface of the base portion 25 that forms the rear surface of the base portion 25. The base fabric 15 extends forward in succession to the upper end portion of the base portion rear plate portion 34 and forms the upper surface of the base portion 25. An upper plate portion 35, a front plate portion 36 extending downward continuously from the front portion of the upper plate portion 35 and constituting the front surface (anti-occupant side surface) of the base portion 25, the intermediate portion 26 and the tip portion 27, and the front plate portion A bottom plate portion 37 that constitutes an occupant-facing surface that extends rearward continuously from the lower end portion of 36 and faces the positions extending from the legs L1, L2 such as the thighs of the occupants P1, P2 to the upper bodies B1, B2, A rear plate 38 as a facing portion that extends upward continuously from the rear upper side of the bottom plate 37 and constitutes a rear surface (occupant side) of the intermediate portion 26, and a base rear plate continuously from the upper end of the rear plate 38 It has a joint portion 39 that is overlapped and joined to the front side of the portion 34.

  The front plate portion 36 is a portion where the upper side faces or contacts the windshield 12 and the lower side faces or contacts the instrument panel portion 11.

  Further, the bottom plate portion 37 has a lower surface portion 37a facing the leg portions L1 and L2 of the occupants P1 and P2, and an abdominal portion A1 and A2 of the occupants P1 and P2 that are curved upward from the rear side of the lower surface portion 37a. A rear lower surface portion 37b facing the upper bodies B1 and B2 such as C1 and C2 and both shoulder portions S1 and S2 is integrally provided.

  Further, the rear plate portion 38 should be referred to as a face-facing portion that faces the face portions F1, F2 of the occupants P1, P2, and is positioned as a top plate portion that is located above the front end portion 27 and is inclined toward the front upper side. The lower inclined surface portion 38a which is an inclined surface, the upper inclined surface portion 38b inclined toward the upper rear side from the upper end portion of the lower inclined surface portion 38a, and the lower portion of the base 25 extending backward from the upper end portion of the upper inclined surface portion 38b. And a base lower surface portion 38c located at the bottom of the space portion 28, and is located over the lower side, the front side, and the upper side of the space portion 28.

  The lower inclined surface portion 38a is inclined toward the upper front side, that is, an inclined surface in which the front is relatively high and the rear is relatively lowered, and the occupants P1, P2 are in the deployed state of the airbag main body portion 18. The head protection surface is opposite to the heads H1 and H2.

  The base fabrics 16 and 17 are also referred to as side panels, etc., and have a panel shape that closes the openings 31 and 32 on both sides of the base fabrics 15 and 16, that is, the notches 41 and 41 at positions corresponding to the space portions 28. 42 is formed into a curved panel shape, and the peripheral edge portion is joined to both sides of the base fabric 15 by, for example, sewing or the like to form side portions 43 and 44 (one and the other). Further, the base fabrics 16 and 17 have, for example, symmetrical shapes with respect to the center line in the width direction of the airbag body 18.

  Next, the deployment behavior of the airbag device 10 will be described.

  As an outline of the operation of the airbag device 10, the control device operates the inflator 20 located inside the airbag main body portion 18 in the event of a collision of an automobile, and when the inflation gas is injected from the inflator 20, The airbag main body 18 stored in the airbag storage part in the folded state protrudes so that the internal pressure is inflated and expanded by the inflation gas and hangs downward, and expands in front of the passengers P1 and P2.

  At this time, the airbag main body 18 has the base portion 25 positioned on the front upper side of the heads H1 and H2 of the occupants P1 and P2, the intermediate portion 26 positioned so as to be separated in front of the occupants P1 and P2, and the distal end portion 27. Projecting to the rear side, which is the occupant P1, P2 side with respect to the intermediate part 26, and deploying so as to be positioned below the base 25 or below the base 25, the rear plate 38 is occupant P1, The face plates F1 and F2 which are front portions of the heads H1 and H2 of P2 are opposed to each other, and the bottom plate portion 37 is in contact with the upper bodies B1 and B2 of the passengers P1 and P2. That is, the upper inclined surface portion 38b of the rear plate portion 38 which is the rear end portion (rear end surface) of the intermediate portion 26 is positioned forward with respect to the position of the rear end of the front end portion 27 (shown by the imaginary line L). In the airbag main body 18, the front plate portion 36 contacts or faces the windshield 12 and the instrument panel portion 11. In this state, the base portion 25 is located above the lower inclined surface portion 38a.

  For this reason, the airbag main body 18 applies a reaction force to the upper bodies B1, B2 of the occupants P1, P2 that have moved forward due to the impact by the tip 27 to further reduce the impact, and further, the occupant P1, The heads H1 and H2 (faces F1 and F2) that are in contact with the rear plate part 38 such as the lower inclined surface part 38a of the intermediate part 26 by moving the front part P2 while pushing the front part 27 are moved to the front part 27. Restrain the impact with a smaller reaction force. The airbag body 18 has a rear plate portion 38 (lower inclined surface portion 38a) that is recessed by the contact of the heads H1 and H2 (face portions F1 and F2), and is relatively forward of the vehicle with respect to the base portion 25. After moving, the position will be slightly pulled backward.

  The airbag body 18 (airbag 19) has a front plate portion 36 supported by the instrument panel 11 to form a receiving surface, so that the position of the airbag body 18 (airbag 19) is determined, Preferred restraints are made.

  Thus, according to the present embodiment, the bag-shaped airbag body 18 is located between the base 25 attached to the vehicle body and the distal end 27 that protects the upper bodies B1, B2 of the occupants P1, P2. By separating the intermediate portion 26 forward from the distal end portion 27, the capacity of the airbag main body portion 18 can be suppressed as compared with an airbag main body portion that hangs downward from the base portion, and passengers P1, P2 The heads H1 and H2 of the occupants P1 and P2 are protected without being squeezed rearward by the intermediate portion 26 while the upper bodies B1 and B2 are securely protected by the tip 27, and the respective parts of the occupants P1 and P2 are protected. Can protect properly.

  Further, the occupant in the unfolded state is formed in an L-shape in a side view in which the intermediate portion 26 is projected upward on the front side which is the side opposite to the occupants P1, P2 of the lower inclined surface portion 38a positioned above the tip portion 27. The intermediate portion 26 that faces the heads H1, H2 of the occupants P1, P2 can be easily formed at a position separated from the front end portion 27 with respect to P1, P2.

  Next, a second embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, instead of the base cloths 16 and 17 of the first embodiment, as shown in FIGS. 4 to 6, panel-like base cloths 51 and 52 such as nylon cloths, for example, are used. Are joined to both sides of the base fabric 15 so as to close the openings 31 and 32 on both sides of the base fabric 15, respectively, and the planar panel portions are formed on the side surface portions 43 and 44 on both sides of the rear plate portion 38 of the intermediate portion 26. Side portions (catch panels) 53 and 54 (one and the other) are formed.

  These base fabrics 51 and 52 are formed in a substantially trapezoidal shape without a curved shape, and the rear side is a straight line extending from the base 25 to the tip 27 along the vertical direction, In 44, the side parts 53 and 54 block the both sides of the space part 28 in a planar shape. In addition, in the present embodiment, for example, the side portion 54 is opposed to the window portion 55 located on one side of the vehicle body.

  Then, in the event of a car collision, the airbag main body 18 inflates and expands and protrudes downward by the supply of inflation gas from the inflator 20 activated by the control device, and the front of the passengers P1 and P2 When the airbag body 18 is deployed, the base portion 25 is positioned on the front upper side of the heads H1 and H2 of the occupants P1 and P2, and the intermediate portion 26 is positioned so as to be separated from the front of the occupants P1 and P2. The rear plate portion 38 is developed so that it projects to the rear side, which is the occupant P1, P2 side, with respect to the intermediate portion 26 and is positioned below the base portion 25 or below the base portion 25, so that the rear plate portion 38 is laid on the occupant P1. , P2 heads H1 and H2, which are front parts of the face F1 and F2, and the bottom plate part 37 is in contact with the upper bodies B1 and B2 of the occupants P1 and P2, and the side parts 53 and 54 Are located on both sides of the space portion 28 in a panel shape, and one side portion 53 faces the window portion 55.

  For this reason, the airbag main body 18 applies a reaction force to the upper bodies B1, B2 of the occupants P1, P2 that have moved forward due to the impact by the tip 27 to further reduce the impact, and further, the occupant P1, The heads H1 and H2 (faces F1 and F2) that are in contact with the rear plate part 38 such as the lower inclined surface part 38a of the intermediate part 26 by moving the front part P2 while pushing the front part 27 are moved to the front part 27. Restrain the impact with a smaller reaction force. Further, when the occupants P1 and P2 move to the side (obliquely upward) due to, for example, an offset collision of an automobile, the airbag main body 18 is connected to the occupants P1 and P2 by either one of the side portions 53 and 54. Receive heads H1 and H2 from the side.

  Thus, by providing the side portions 53, 54 closer to the occupants P1, P2 side than the intermediate portion 26 on both sides of the rear plate portion 38 of the intermediate portion 26, the side portions 53, 54 allow the occupants P1, P2 to The positions of the heads H1 and H2 are restricted, and the heads H1 and H2 of the occupants P1 and P2 can be prevented from being largely displaced laterally with respect to the airbag body 18 (airbag 19).

  Further, the side portions 53 and 54 can be easily formed by forming the side portions 53 and 54 into a panel shape with the base fabrics 51 and 52.

  Further, since the side portions 53 and 54 connect the side portion of the base portion 25 and the side portion of the distal end portion 27, the side portions 53 and 54 (base fabric 51, 52) restricts the distal end 27 from extending below the base 25 more than necessary, so that the airbag body 18 (airbag 19) can be deployed in a desired shape in a shorter time. .

  In addition, as in the third embodiment shown in FIG. 7, a panel-like base fabric 57 such as a nylon fabric is provided on the base fabrics 16 and 17 so as to cover the notches 41 and 42 of the base fabrics 16 and 17. , 58 can be joined to form side portions 53, 54 located on both sides of the rear plate portion 38 (space portion 28), and the same operational effects as in the second embodiment can be obtained. .

  Next, a fourth embodiment will be described with reference to FIGS. In addition, about the effect similar to said each embodiment, the description which attaches the same code | symbol and abbreviate | omits.

  In the fourth embodiment, a recess 61, which is a through portion penetrating in the front-rear direction, is formed in the central portion of the rear plate portion 38 of the intermediate portion 26 of the airbag main body portion 18 of the first embodiment. It is what has been.

  The recess 61 is formed in a quadrangular shape when viewed from the front, and is disposed at a position closer to the lower side of the upper inclined surface portion 38b of the rear plate portion 38. That is, the recess 61 has a front through hole 63 that is one through hole formed in the front plate portion 36 in a square shape and a rear side through hole that is the other through hole formed in the rear plate portion 38 in a square shape. The hole 64 is formed in communication with each other, and the lower side is formed by the inclined plate part 65 which is a part of the lower inclined surface part 38a of the rear plate part 38 positioned above the tip part 27, and the upper side is formed by the base 25. Both side portions are surrounded by (one and the other) side plate portions 67 and 68 connecting the both sides of the inclined plate portion 65 and the lower plate portion 66, respectively. Therefore, on both sides of the recess 61, there are side portions 71 which are air chambers between the side plate portion 67 and the side surface portion 43 (base fabric 16) and between the side plate portion 68 and the side surface portion 44 (base fabric 17). , 72 are formed. Further, a tether 74, which is a connecting member, is attached to the inside of the airbag main body 18 so as to connect the front plate portion 36 and the rear lower surface portion 37b of the bottom plate portion 37.

  The dimensions of the recess 61 (rear through hole 64) are set such that the heads H1, H2 of the passengers P1, P2 can be inserted. Further, the recess 61 is formed so that the width dimension gradually decreases from the rear side, which is the occupant P1, P2 side, to the front side (back side), which is the anti-occupant P1, P2 side. Further, the front-rear length, that is, the depth of the recess 61 is set such that the tops of the heads H1, H2 of the occupants P1, P2 do not protrude forward of the airbag body 18.

  The inclined plate portion 65 is located above the distal end portion 27 and is inclined toward the upper front side, that is, an inclined surface in which the front is relatively high and the rear is relatively lowered. It is a head protection surface that faces the heads H1, H2 of the occupants P1, P2 when the part 18 is deployed.

  Further, the side parts 71 and 72 are flow paths through which the expansion gas passes from the base part 25 and the intermediate part 26 to the tip part 27. That is, these side parts 71 and 72 are located in the intermediate part 26 and communicate the base part 25 and the tip part 27.

  Further, the tether 74 is formed of, for example, one sheet or a plurality of base cloths and is located inside the distal end portion 27, and chests C1 of the upper bodies B1, B2 of the occupants P1, P2 of the distal end portion 27. , Restricts the thickness in the front-rear direction of the position corresponding to C2. The tether 74 is disposed at the center of the airbag body 18 in the left-right width direction, the front end is joined to the front plate 36 by, for example, sewing, and the rear end is behind the bottom plate 37. For example, it is joined to the lower surface portion 37b by sewing or the like.

  Then, in the event of a car collision, the airbag main body 18 inflates and expands and protrudes downward by the supply of inflation gas from the inflator 20 activated by the control device, and the front of the passengers P1 and P2 When the airbag body 18 is deployed, the base portion 25 is positioned on the upper front side of the heads H1, H2 of the occupants P1, P2, and the intermediate portion 26 (recessed portion 61) is positioned in front of the occupants P1, P2. Then, the rear plate portion is developed so that the front end portion 27 protrudes to the rear side which is the occupant P1, P2 side with respect to the intermediate portion 26 and is positioned below the base portion 25 or below the base portion 25. 38 faces the face portions F1 and F2 which are the front portions of the heads H1 and H2 of the occupants P1 and P2, the bottom plate portion 37 faces the upper bodies B1 and B2 of the occupants P1 and P2, and The portions 71 and 72 are located on both sides of the recess 61, and the other side portion 72 faces the window portion 55.

  For this reason, the airbag body 18 is distal to the upper bodies B1, B2 such as the abdominal parts A1, A2, chests C1, C2 and both shoulders S1, S2 of the occupants P1, P2 that have moved forward due to the impact. The heads H1 and H2 are inserted into the recesses 61 of the intermediate part 26 by applying a reaction force to the part 27 to alleviate the impact and further moving the passengers P1 and P2 forward while pushing the tip part 27. As a result, the heads H1 and H2 are restrained by a reaction force smaller than that of the tip part 27 to alleviate the impact, and the deflection angles of the neck parts N1 and N2 are suppressed. Further, the airbag main body 18 has an increased internal pressure due to the pushing of the distal end portion 27 due to the loads of the passengers P1 and P2, and the side portions 71 and 72 (side plate portions 67 and 68) surrounding the recess 61, the inclined plate portion 65 and the lower plate When the portion 66 bulges toward the recess 61, the heads H1 and H2 of the occupants P1 and P2 are received at a plurality of locations to restrict the movement thereof, and the necks N1 and N2 of the occupants P1 and P2 are restrained from being biased. .

  Thus, by providing the side portions 71 and 72 on both sides of the rear plate portion 38 of the intermediate portion 26, the side portions 71 and 72 regulate the positions of the heads H1 and H2 of the occupants P1 and P2, and the occupant P1 , P2 heads H1 and H2 can be prevented from being greatly displaced laterally with respect to the airbag body 18 (airbag 19).

  Further, by using the side portions 71 and 72 as air chambers, the buffering properties of the side portions 71 and 72 can be further improved, and the heads H1 and H2 of the passengers P1 and P2 can be more appropriately protected.

  Further, the intermediate portion 26 is surrounded by an inclined plate portion 65 located above the distal end portion 27, a lower plate portion 66 located below the base portion 25, and side portions 71 and 72 located on both sides, and is in an unfolded state. By providing the recess 61 into which the heads H1 and H2 can be inserted, the heads H1 and H2 of the occupants P1 and P2 inserted into the recess 61 can be surrounded from the top, bottom, left and right, and the occupants P1 and P2 The heads H1 and H2 can be made difficult to shift in any direction with respect to the airbag body 18, and the internal pressure of the airbag when the airbag body 18 receives the occupants P1 and P2 by the tip 27 is reduced. As the side portions 71 and 72 (side plate portions 67 and 68), the inclined plate portion 65 and the lower plate portion 66 bulge into the recess 61 due to the rise, a plurality of heads H1 and H2 inserted into the recess 61 are provided. And can be restrained more reliably.

  The inclined plate portion 65 that surrounds the lower side of the recess 61 and contacts the faces F1 and F2 of the heads H1 and H2 of the passengers P1 and P2 inserted into the recess 61 inclines upward toward the anti-occupants P1 and P2. Therefore, it is possible to suppress the deviation of the necks N1 and N2 of the occupants P1 and P2 in a state where the heads H1 and H2 are in contact with the inclined plate part 65.

  Further, by gradually narrowing the width dimension of the recess 61 toward the side opposite to the occupants P1, P2, the heads H1, H2 of the occupants P1, P2 inserted into the recess 61 can be more reliably restrained.

  In each of the above embodiments, the airbag 19 can be used as, for example, an airbag for a driver's seat occupant or an airbag for a rear occupant.

  The present invention can be suitably used, for example, as an airbag for a passenger on a passenger seat attached to a roof portion.

18 Airbag body
19 Airbag
21 compartment
25 base
26 Middle part
27 Tip
38 Rear plate as opposed part
38a Lower inclined surface as top plate
53, 54, 71, 72 Side
61 recess
66 Lower plate
B1, B2 upper body
H1, H2 head
P1, P2 crew

Claims (6)

An airbag comprising a bag-like airbag body portion positioned at the upper part of a vehicle compartment and attached to the vehicle body, inflated and deployed downward by supplying inflation gas and positioned in front of the occupant,
The airbag body is
A base attached to the vehicle body;
A tip that protects the upper body of the occupant in the unfolded state;
An airbag comprising: an intermediate portion that is provided between the base portion and the distal end portion and faces the occupant's head at a position spaced forward from the distal end portion in the deployed state. The middle part
A facing portion facing the front of the head of the occupant in the unfolded state;
The airbag according to claim 1, further comprising a side portion that is provided on a side portion of the facing portion and is closer to the occupant side than the facing portion. The air bag according to claim 2, wherein the side portion is provided in a panel shape. The airbag according to claim 2, wherein the side portion is an air chamber. It has a top plate located above the tip,
The airbag according to any one of claims 1 to 4, wherein the intermediate portion is positioned to protrude upward in front of the top plate portion. Comprising a lower plate located below the base,
The middle part
Side parts located on both sides;
The airbag according to claim 5, further comprising: a recess that is surrounded by at least a part of the top plate portion, the lower plate portion, and the side portion and into which the head of the occupant can be inserted in a deployed state. .

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