JP2019156156A - Airbag device - Google Patents

Abstract

To provide an airbag device which can inhibit recessed deformation of a cover body.SOLUTION: An airbag 23 forms a recessed part 57 in at lease one of an occupant facing part 55 and a non occupant facing part 56. A case 21 includes a support part 28 which supports a cover body 26 through the recessed part 57 in a manner that the cover body 26 can be separated from a housing body part 25. The structure allows the support part 28 to support the cover body 26 relative to the housing body part 25 to inhibit recessed deformation of the cover body 26 even if external force is applied to the cover body 26 while inhibiting the support part 28 from hindering expansion of the airbag 23.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an airbag device that stores an airbag between a storage body portion of a storage body and a cover body.

  2. Description of the Related Art Conventionally, a so-called knee airbag device, which is a knee protection airbag device that deploys an airbag facing an occupant's knee or the like seated in a car seat, is known. This knee airbag device is disposed, for example, below the glove box in front of the passenger seat or below the steering wheel in front of the driver seat on the instrument panel. It is stored. When the control device detects an impact such as a frontal collision of the vehicle, gas is supplied from the inflator to the airbag, the airbag projects from the case body, and the airbag is further connected to the instrument panel and the occupant's knee. The limbs of the occupant are restrained and protected by being inflated and deployed.

  In such a knee airbag device, for example, in order to improve the so-called knee-insertion performance of allowing the airbag to enter between the occupant's knee and the vehicle body, the airbag is stored without being folded in a small size. A device that inflates and deploys an airbag together with a covering plate-like cover body is known (see, for example, Patent Document 1).

JP 2004-338677 A (page 4-5, FIG. 1-2)

  In the case of the above configuration, since the airbag is stored without being folded small, the cover body becomes relatively large. Therefore, it is not easy to obtain sufficient rigidity, and it is required to suppress the dent deformation of the cover body at the position where the airbag is accommodated, that is, stickiness.

  This invention is made in view of such a point, and it aims at providing the airbag apparatus which can suppress the dent deformation | transformation of a cover body.

  The airbag device according to claim 1 is an airbag, a storage main body portion located on a side opposite to the occupant with respect to the airbag, and an inflation of the airbag located on the occupant side with respect to the airbag. And a storage body for storing the airbag between the storage main body portion and the cover body, the airbag being in the occupant side in the deployed state. An occupant-facing portion located on the opposite side of the occupant-facing portion in a deployed state, and a recess formed in at least one of the occupant-facing portion and the non-occupant-facing portion. And the storage body includes a support portion that detachably supports the cover body with respect to the storage main body via the recess.

  The airbag device according to claim 2 is the airbag device according to claim 1, wherein the concave portion is a hole that penetrates the occupant facing portion and the non-occupant facing portion.

  The airbag device according to claim 3 is the airbag device according to claim 1 or 2, wherein the support portion includes a protruding portion that protrudes from at least one of the storage main body portion and the cover body and is inserted into the recessed portion. It is a thing.

  According to the airbag device of the first aspect, since the support portion supports the cover body so as to be separable from the storage body portion via the recess of the airbag, the obstruction of the inflation of the airbag by the support portion is suppressed. However, even if an external force is applied to the cover body, the cover body is supported by the support body portion by the support portion, and the dent deformation of the cover body can be suppressed.

  According to the airbag device of the second aspect, in addition to the effect of the airbag device of the first aspect, the concave portion is a hole that penetrates the occupant facing portion and the non-occupant facing portion, thereby supporting the support portion. The cover body can be directly supported with respect to the storage main body portion, and can be firmly supported, and the support portion can be formed so as not to come into contact with the airbag in the storage state, thereby supporting the inflation of the airbag. It is hard to disturb by part.

  According to the airbag device of the third aspect, in addition to the effect of the airbag device of the first or second aspect, the protruding portion that protrudes from at least one of the storage main body portion and the cover body and is inserted into the recessed portion. By providing the support portion, the support portion that supports the cover body with respect to the storage main body portion can be configured at low cost.

It is sectional drawing which shows typically the II equivalent position of FIG. 2 in the accommodation state of the airbag of the airbag apparatus of the 1st Embodiment of this invention. It is a front view which shows an airbag apparatus same as the above from the passenger | crew side except a cover body. (A) is a perspective view which shows the 1st protrusion part of the support part of the case of an airbag apparatus same as the above, (b) is a perspective view which shows the 2nd protrusion part of a support part same as the above. It is sectional drawing which shows typically the inflation state of the airbag of an airbag apparatus same as the above. (A) is a perspective view which shows typically the accommodation state of the airbag of an airbag apparatus same as the above, (b) is a perspective view which shows typically the inflation state of the airbag of the airbag apparatus same as the above. It is a front view which shows the airbag apparatus of the 2nd Embodiment of this invention from a passenger | crew side except a cover body. It is sectional drawing which shows typically the position of the support part vicinity of the airbag apparatus of the 3rd Embodiment of this invention. It is a perspective view which shows the protrusion part of the support part of the 4th Embodiment of this invention. It is a perspective view which shows the protrusion part of the support part of the 5th Embodiment of this invention. It is sectional drawing which shows typically the position of the support part vicinity of the airbag apparatus of the 6th Embodiment of this invention. It is sectional drawing which shows typically the accommodation state of the airbag of the airbag apparatus of the 7th Embodiment of this invention. It is sectional drawing which shows typically the accommodation state of the airbag of the airbag apparatus of the 8th Embodiment of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.

  In FIG. 1, 10 is an airbag apparatus. The airbag device 10 is used as a knee airbag device, that is, a knee protection airbag device in the present embodiment, and is disposed in a vehicle compartment 12 of a vehicle such as an automobile, and the vehicle is subjected to an impact such as a frontal collision. When it is received, it is deployed to face the occupant's feet, that is, the lower limb part A which is a protected part, and the occupant's lower limb part A is restrained to protect the occupant. Hereinafter, directions such as the front-rear direction are based on the straight direction of the vehicle body. That is, as shown in FIG. 1, the front (arrow F direction) of the vehicle is the rear side when viewed from the passenger, and the rear (arrow R direction) of the vehicle is the passenger side, that is, the front side when viewed from the passenger. In addition, the upper and lower direction will be described above and below with reference to the vehicle. Further, the vehicle width direction is the width direction (the direction of the arrow W shown in FIG. 2) which is the both-side direction of the airbag device 10, that is, the left-right direction.

  The vehicle body on which the airbag device 10 is installed has a seat such as a driver's seat and a passenger seat in which passengers can sit in the passenger compartment 12, and a windshield (not shown) and a cover are placed in front of the seat. An instrument panel 14 which is an installation part is arranged. The airbag device 10 is disposed in the lower part or middle part below the instrument panel 14.

  The airbag device 10 includes a case 21 that is a storage body. The airbag device 10 also includes an inflator 22 that is a gas supply means. Further, the airbag device 10 includes an airbag 23 that is inflated by a gas supplied by the inflator 22. The airbag device 10 is configured by storing an airbag 23, an inflator 22, and the like in a case 21.

  The case 21 is also called a housing or the like, and includes a storage body portion 25 located on the opposite side to the occupant, that is, the front side with respect to the airbag 23, and a cover body 26 located on the occupant side with respect to the airbag 23. ing. In the case 21, a storage space 27 is formed between the storage main body 25 and the cover body 26, and the airbag 23 is stored in the storage space 27. Further, a support portion 28 is formed in the case 21. As the case 21, for example, a glove box can be used.

  The storage main body 25 shown in FIGS. 1 and 2 is also called an inner panel or the like, and is a non-design panel that is not exposed in the passenger compartment 12, and the inflation pressure of the airbag 23 and the airbag 23 when restraining the passenger A pressure-receiving surface that receives the reaction force of the internal pressure. For example, the storage main body 25 is formed so as to incline upward toward the occupant side as a whole. In the present embodiment, the storage main body 25 includes a vertical wall portion 31 extending in the vertical direction, an extension portion 32 extending from the upper end portion of the vertical wall portion 31 toward the occupant side, and the extension portion. A main body wall 33 extending upwardly from 32 toward the occupant side, an occupant side extension 34 extending from the upper end of the main body wall 33 toward the occupant, and both sides in the width direction are configured. The side portions 35 and 35 are integrally provided. That is, the storage main body 25 is formed in a box shape that defines the opening 36 on the passenger side. The occupant side extension 34 is connected to the design surface of the instrument panel 14. Accordingly, the storage main body 25 is positioned so as to be recessed on the opposite side to the occupant with respect to the design surface of the instrument panel (installed portion) 14. Although not shown, the storage main body 25 may include side portions constituting both side portions in the width direction. Further, the storage main body 25 may be, for example, the back surface of the inner box portion of the glove box or may be formed integrally with the instrument panel 14. That is, a part of the installation portion may be configured by the storage main body 25.

  In the present embodiment, the opening 36 has a quadrangular shape whose longitudinal direction is on both sides, and is opened at a position facing the lower limb A of the occupant. The opening 36 is formed, for example, larger than the airbag 23 stored in the case 21 and smaller than the airbag 23 inflated by the supply of gas from the inflator 22.

  The cover body 26 is also called a lid, an outer panel, or the like, and is a design panel that is separate from the storage main body 25 and is exposed in the vehicle compartment 12. The cover body 26 is integrally formed of, for example, a synthetic resin. The cover body 26 is formed in a plate shape along a predetermined surface. In the present embodiment, the cover body 26 includes a fixed portion 41 that is fixed to the storage body portion 25 side, an occupant facing surface portion 42 that is deployed to the occupant side as the airbag 23 is inflated, and the fixed portions 41. And an occupant facing surface portion 42 are integrally provided with a hinge portion 43. The cover body 26 covers the opening 36 so that it can be opened and closed. That is, the cover body 26 covers the opening 36 in a state of being fixed to the storage main body 25, and can open the opening 36 by operating (turning) with respect to the storage main body 25. It has become. The cover body 26 may be formed, for example, connected to the design surface of the instrument panel 14, or may be separate from the instrument panel 14.

  The fixed portion 41 is fixed to the lower end portion of the vertical wall portion 31 with respect to the storage main body portion 25, for example. The fixed portion 41 is a portion that basically does not operate with respect to the storage main body portion 25 in a fixed state.

  The occupant facing surface portion 42 is an occupant contact portion that is disposed at a position facing the limb A of the occupant and directly contacts the limb A of the occupant when the airbag 23 is inflated. The occupant facing surface portion 42 is formed to be inclined upward toward the occupant side. The occupant facing surface portion 42 is disposed in parallel (including substantially parallel to) the main body wall portion 33 of the storage main body portion 25, for example. The occupant facing surface portion 42 is formed to expand in the vertical and horizontal directions and has a predetermined area. In the present embodiment, the occupant facing surface portion 42 is formed in, for example, a rectangular shape that is long in the width direction, that is, horizontally long. The occupant facing surface portion 42 has a larger outer shape than the airbag 23 stored in the case 21. Further, the occupant facing surface portion 42 is connected to the storage main body portion 25 (instrument panel 14) so that the outer edges of the upper portion and both side portions can be detached. Therefore, the occupant facing surface portion 42 is configured to open at least a part of the opening 36 by the inflation pressure of the airbag 23. For example, a tear line that is a weak portion that is broken with respect to the storage main body portion 25 (instrument panel 14) by the inflation pressure of the airbag 23 is formed on the outer edge of the upper portion and both side portions of the passenger facing surface portion 42. It may be.

  The hinge portion 43 shown in FIG. 1 is located at the lower end portion of the occupant facing surface portion 42, and is a portion that serves as a rotation starting point when the occupant facing surface portion 42 is deployed on the occupant side.

  The storage space 27 is a space that extends in the front-rear direction, the left-right direction, and the up-down direction. The storage space 27 is set according to the size of the airbag 23 to be stored.

  The support part 28 supports the cover body 26 so as to be separable from the storage main body part 25. The support portion 28 includes a protruding portion 45. In the present embodiment, a plurality of support portions 28 are formed. For example, two support portions 28 are formed on the top, bottom, left, and right. These support portions 28 are arranged apart from each other in the vertical and horizontal directions. Further, these support portions 28 are arranged, for example, symmetrically (including substantially symmetrical). Further, these support portions 28 are respectively arranged on the upper side and the lower side with respect to the central portion of the case 21 in the vertical direction.

  As shown in FIGS. 1, 3A, and 3B, the protrusion 45 is a first protrusion that is a (first) protrusion protruding from the storage body 25 in the present embodiment. 45a and a second protrusion 45b which is a (second) protrusion protruding from the cover body 26 are set. The protrusion 45 is formed with a positioning portion 47 for positioning the support portion 28.

  The first protrusion 45a protrudes from the storage main body 25 toward the occupant side. The first protrusion 45a protrudes from the main body wall 33 of the storage main body 25, for example. The first protrusion 45a is formed in a solid shape having a rigidity higher than that of the storage main body 25 and the cover body 26. For example, the first protrusion 45a is formed in a columnar shape that decreases from the proximal end side toward the distal end side. In the present embodiment, the first protrusion 45a is formed in a columnar shape whose diameter decreases from the proximal end side toward the distal end side. That is, the first protrusion 45a is formed so that the outer surface is inclined with respect to the protruding direction.

  The second protrusion 45b protrudes from the cover body 26 toward the side opposite to the passenger side. The second protrusion 45b is formed in a solid shape having higher rigidity than the storage main body 25 and the cover body 26, and protrudes from the back surface of the occupant facing surface portion 42 of the cover body 26, for example. For example, the second protrusion 45b is formed in a columnar shape that decreases from the proximal end side toward the distal end side. In the present embodiment, the second protrusion 45b is formed in a columnar shape whose diameter decreases from the proximal end side toward the distal end side. That is, the second protrusion 45b is formed so that the outer surface is inclined with respect to the protruding direction.

  The positioning portion 47 positions the cover body 26 with respect to the storage body portion 25, for example, vertically and horizontally by positioning the support portion 28. In the present embodiment, the positioning portion 47 is set with a first positioning portion 47a formed on the first projection 45a and a second positioning portion 47b formed on the second projection 45b. Yes. In the present embodiment, the first positioning portion 47a is a recessed portion and the second positioning portion 47b is a protruding portion, but the opposite may be possible.

  The first protrusion 45a and the second protrusion 45b are abutted against each other. That is, the first protrusion 45a and the second protrusion 45b are in contact with each other in the front-rear direction. At this time, the cover body 26 is positioned in the vertical and horizontal directions with respect to the storage main body 25 by fitting the positioning portions 47a and 47b.

  As shown in FIGS. 1 and 2, the inflator 22 includes, for example, an inflator body 22a having a substantially cylindrical shape in the present embodiment, and a gas injection part 22b is provided in the vicinity of one end of the inflator body 22a. In addition, a connection portion (not shown) is provided at the other end portion. The inflator 22 is disposed, for example, at the forefront and bottom of the case 21 and is positioned along the width direction. In the present embodiment, the inflator 22 is stored at a position between the vertical wall portion 31, the extension portion 32, the side surface portions 35 and 35 of the storage main body portion 25, and the fixed portion 41 of the cover body 26. ing. The inflator 22 is connected to the control device via a harness (not shown) connected to the connection portion, and injects gas from the gas injection portion 22b based on an activation signal supplied from the control device via the harness. .

  The airbag 23 is formed in a bag shape by sewing one base cloth or sewing a plurality of base cloths. The airbag 23 is integrally provided with an airbag main body 51 constituting a bag-like outer shell for restraining the lower limb portion A of the occupant and a gas introducing portion 52 attached to the case 21 together with the inflator 22. Yes. Although not shown, the airbag 23 may be appropriately provided with a reinforcing cloth for reinforcing against an inflation pressure or the like, or a partition partitioning the interior into a plurality of parts. In the present embodiment, the airbag 23 is not folded small, for example, and is stored in the case 21 in a flat state as a whole.

  The airbag main body 51 is formed in a bag shape by a joining portion 54 in which one or a plurality of base fabrics cut into a predetermined shape are joined by sewing or the like. The airbag main body 51 has an occupant-facing portion 55 that faces the occupant side in the inflated state, that is, the occupant's lower limb A, and a non-occupant facing side that is located on the opposite side of the occupant in the inflated state, that is, the instrument panel 14 side And at least a portion 56. Further, in the present embodiment, the airbag main body 51 includes a recess 57. Further, the airbag main body 51 is formed wider in the width direction than in the up-down direction, that is, horizontally long. Further, the airbag main body 51 is formed to inflate with a predetermined thickness in the front-rear direction.

  The joint portion 54 includes, for example, an outer edge joint portion 61 and an inner joint portion 62 that surrounds the recess 57. The outer edge joint portion 61 is formed so as to surround the outer edge portion of the airbag body 51 and seals the entire airbag body 51 in a bag shape. Further, in the present embodiment, the inner joint portion 62 is formed in a circular shape (loop shape) surrounding the concave portion 57, and between the outer edge joint portion 61 and the inner joint portion 62 of the airbag main body 51. An inflatable portion (air chamber) 63 is defined, and the inside of the inner joint portion 62 is defined as a non-inflatable portion 64.

  The occupant facing portion 55 is also called an occupant facing surface or the like, and is a portion that restrains the lower limb portion A of the occupant via the cover body 26. The occupant facing portion 55 is at least partially in close contact with the back side of the cover body 26, mainly the back side of the occupant facing surface portion 42, when the airbag 23 is inflated. In the present embodiment, the occupant facing portion 55 is positioned so as to face the cover body 26 (occupant facing surface portion 42) in a planar shape in a state where the airbag 23 is housed in the case 21.

  The non-occupant facing portion 56 is located on the opposite side of the occupant side with respect to the occupant facing portion 55, and restrains the occupant by contacting the storage body 25 and the instrument panel 14 when restraining the occupant by the airbag 23. The reaction force from the airbag 23 is applied to the occupant via the occupant facing portion 55 (cover body 26). The non-occupant facing portion 56 is positioned so as to face the storage main body portion 25 (main body wall portion 33) in a planar shape in a state where the airbag 23 is stored in the case 21.

  In the present embodiment, recess 57 is formed as a hole that penetrates occupant facing portion 55 and non-occupant facing portion 56. That is, the concave portion 57 is formed by hollowing out the non-inflatable portion 64. The recess 57 is formed in a circular shape in the present embodiment. The recess 57 is for avoiding interference between the protrusion 45 (first protrusion 45a and second protrusion 45b) and the airbag 23, and the protrusion 45 (first protrusion 45a and second protrusion 45b). It is formed larger than the maximum diameter dimension.

  The gas introduction part 52 is a base end part constituting the base end side of the airbag 23. The gas introduction part 52 is provided with an opening (not shown) into which the inflator 22 is inserted. In the present embodiment, the gas introduction part 52 is located at a position between the vertical wall part 31, the extension part 32 and the side parts 35, 35 of the storage body part 25 and the fixed part 41 of the cover body 26. It is stored.

  The airbag device 10 fixes the case 21 to the instrument panel 14 of the vehicle body using an appropriate attachment, and attaches the cover body 26 so as to be substantially flush with the design surface of the instrument panel 14. The harness connected to the inflator 22 is electrically coupled to the control device, and the airbag device 10 is installed on the vehicle body as shown in FIGS. 1 and 5A.

  In this state, the cover body 26 that spreads in a relatively wide surface is supported by the support portion 28 with respect to the storage main body portion 25, so that the support portion 28 (protruding portion 45) against the external force from the passenger side. In other words, it acts as a strong support, and the dent deformation of the cover body 26, that is, the surface swing (stickiness) is suppressed.

  When the control device detects an impact such as a frontal collision of the automobile from the state shown in FIG. 1, the control device supplies power as an activation signal through the harness and activates the inflator 22. Then, when gas is supplied from the inflator 22 into the airbag 23, the gas flows into the airbag 23 because there is room in a portion other than the recess 57 of the airbag 23 (airbag body 51). Is less disturbed and flows relatively freely into the airbag 23. For this reason, the airbag 23 is inflated inside the case 21 and the cover body 26 is pressed by the occupant facing portion 55 to rotate the cover body 26 toward the occupant side with respect to the storage body portion 25. Specifically, the cover body 26 is pressed toward the occupant side by the inflation pressure of the airbag 23, and the occupant facing surface portion 42 pivots toward the occupant side around the hinge portion 43, so that both sides and the upper portion of the opening 36 are Open. Further, as the airbag 23 is inflated, the storage main body 25 and the cover body 26 are relatively separated from each other in the front-rear direction, so that the protrusion 45 of the support portion 28 is detached from each recess 57, and the airbag 23 is inflated. I do not disturb. In the present embodiment, the first protrusion 45a and the second protrusion 45b are separated from each other at the position of the abutted tip, and are separated from the recess 57, respectively. 4 and 5 (b), the airbag 23 is inflated in the front-rear direction and the up-down and left-right directions, and a part of the outer edge of the airbag body 51 extends outward from the opening 36. Deploy to get out.

  As a result, as shown in FIG. 4, when the lower limb part A of the occupant contacts the cover body 26 (occupant facing surface part 42), the inflated airbag 23 located on the back side of the cover body 26 has an appropriate reaction force. To catch and protect the lower leg A of the occupant.

  As described above, the support portion 28 supports the cover body 26 so as to be separable from the storage main body portion 25 via the recess 57 of the airbag 23, thereby preventing the support portion 28 from hindering the inflation of the airbag 23. On the other hand, even when an external force is applied to the cover body 26, the cover body 26 is supported by the support main body 25 by the support portion 28, and the dent deformation of the cover body 26 can be suppressed.

  In addition, the concave portion 57 is a hole that penetrates the occupant facing portion 55 and the non-occupant facing portion 56, so that the cover body 26 is directly supported to the storage body portion 25 without the airbag 23 being sandwiched by the support portion 28. The support portion 28 can be formed so as not to come into contact with the accommodated airbag 23, and the inflation of the airbag 23 is hardly hindered by the support portion 28.

  Further, the support portion 28 includes a protrusion 45 that protrudes from at least one of the storage body portion 25 and the cover body 26 and is inserted into the recess 57, thereby supporting the cover body 26 with respect to the storage body portion 25. The support portion 28 can be configured at a low cost.

  Since the protruding portion 45 is formed such that the outer surface facing the inner surface of the recessed portion 57 is inclined and the distal end portion is narrower than the base end portion, the protruding portion 45 (first The protrusion 45a and the second protrusion 45b) are more easily separated from the recess 57, and the support portion 28 (protruding portion 45) does not easily prevent the airbag 23 from being smoothly deployed.

  In addition, by forming the positioning portion 47 in the protruding portion 45, the first protrusion 45a and the second protrusion 45b can be brought into a state of being opposed to each other, and the cover body 26 is stored in the storage body. It can be assembled to the portion 25 with high positional accuracy.

  Further, the projecting portion 45 is constituted by a first projection 45a projecting from the storage main body portion 25 and a second projection 45b projecting from the cover body 26. Therefore, the first projection 45a and the second projection are formed. The cover body 26 can be supported with respect to the storage main body 25 without increasing the length of the first protrusion 45a and the second protrusion 45b by abutting the tip of the protrusion 45b. It is more difficult to prevent the bag 23 from expanding.

  Further, by forming the support portion 28 at a plurality of locations, the support force by the support portion 28 can be applied to the entire cover body 26 spreading in the vertical and horizontal directions, and the cover body 26 is likely to be locally deformed. The part can be prevented from being formed.

  As a result, in the knee airbag device in which the airbag 23 is deployed by pushing up the cover body 26, it is possible to provide the airbag apparatus 10 that can suppress the dent deformation of the cover body 26 at a low cost.

  In the first embodiment, the position, number, and dimensions of the support portion 28 are not specified, and may be changed as appropriate according to the size and shape of the airbag 23 or desired deployment characteristics. Good. For example, as in the second embodiment shown in FIG. 6, support portions 28 having different dimensions may be formed. Thus, by setting the support portion 28 and the recess (hole portion) 57 corresponding to the support portion 28, the gas in the airbag 23 (airbag body portion 51) when the airbag 23 is inflated. The flow of air and the amount of expansion of the air chamber can be controlled.

  Further, in each of the above-described embodiments, the distal end portion of the protruding portion 45 (the first protrusion 45a and the second protrusion 45b) constituting the support portion 28 is as in the third embodiment shown in FIG. Each may be abutted as a planar shape. Furthermore, the shape of the protrusion 45 can be set to an arbitrary shape as long as the protrusion 45 does not get caught. For example, the protrusion 45 may be formed as a boss so as not to be inclined on the outer surface as in the fourth embodiment shown in FIG. Further, the protruding portion 45 may have a cylindrical shape or the like having a plurality of ribs 66 as reinforcing portions around the protruding direction, as in the fifth embodiment shown in FIG.

  Further, the protruding portion 45 of the support portion 28 may protrude from only one of the storage main body portion 25 and the cover body 26. That is, the projecting portion 45 can be configured to project from the cover body 26 side, pass through the recessed portion 57, and abut the distal end portion against the storage main body portion 25, as in the sixth embodiment shown in FIG. However, it can be configured such that it protrudes from the storage main body 25 side and is inserted into the concave portion 57 so that the tip end abuts against the back side of the cover body 26.

  Furthermore, the airbag 23 can be configured to be accommodated in the case 21 in a folded state as in the seventh embodiment shown in FIG. In this case, for example, by folding so that the concave portions 57 that are a plurality of through holes respectively surrounded by the inner joint portion 62 overlap, it is possible to configure one through hole through which the protruding portion 45 of the support portion 28 is inserted by the concave portion 57, The same operational effects as those of the above embodiments can be obtained.

  Further, the concave portion 57 is not limited to the through hole in which the non-expanded portion 64 is hollowed out, and may be formed as a simple depression, for example, as in the eighth embodiment shown in FIG. For example, when the protrusion 45 includes a first protrusion 45a and a second protrusion 45b, the recess 57 is formed in each of the occupant facing portion 55 and the non-occupant facing portion 56, and the tip portions of the protrusions 45a and 45b. Even when the thin film-like non-expandable portion 64 positioned between the recesses 57 is sandwiched, the same effects as those of the above embodiments can be obtained. Further, when the protruding portion 45 protrudes from only one of the storage main body portion 25 and the cover body 26, the recessed portion 57 is formed only in the occupant facing portion 55 or the non-occupant facing portion 56, and the protruding portion 45 The front end may be abutted against the cover body 26 or the storage main body 25 via the non-inflatable portion 64 located at the bottom of the recess 57.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used as, for example, a knee airbag device for a vehicle such as an automobile, and also includes an airbag device for a passenger seat, a door panel, and an airbag device provided with an airbag arranged in a planar shape inside an upper panel of a dashboard. It can be used as a side airbag (inflatable door trim) device installed between the door trim and an inflatable ceiling device arranged between the roof panel and the headlining.

10 Airbag device
21 Case that is a container
23 Airbag
25 Storage body
26 Cover body
28 Support section
45 Protrusion
55 Passenger facing part
56 Non-occupant facing part
57 Recess

Claims (3)

An airbag,
A storage main body located on the opposite side of the airbag from the occupant, and a cover body positioned on the occupant side relative to the airbag and spaced apart from the storage main body by expansion of the airbag. A storage body for storing the airbag between the storage main body portion and the cover body,
The airbag is
An occupant facing portion located on the occupant side in the unfolded state;
A non-occupant facing portion located on the opposite side of the occupant facing portion in a deployed state;
A recess formed in at least one of the occupant facing portion and the non-occupant facing portion,
The airbag device includes a support portion that supports the cover body so as to be separable from the storage body portion via the recess. The airbag device according to claim 1, wherein the recess is a hole that penetrates the occupant facing portion and the non-occupant facing portion. The airbag device according to claim 1, wherein the support portion includes a protruding portion that protrudes from at least one of the storage main body portion and the cover body and is inserted into the recessed portion.

Images