JP6550313B2 - Airbag cover - Google Patents

Description

  The present invention relates to an airbag cover.

  Conventionally, an air bag is known which protects an occupant from an impact when a vehicle such as a car collides (for example, Patent Document 1).

  The air bag cover described in Patent Document 1 includes a cover body that covers the folded air bag, and a skin material that covers the outer surface of the cover body. In the air bag cover described in Patent Document 1, a sewn portion is formed by sewing a plurality of leathers (synthetic leather, natural leather, etc.), and the sewn portion of this leather is directly on the tear line of the cover body. It is arranged.

JP, 2009-220633, A

  In the airbag cover described in Patent Document 1, the sewn portion of leather is disposed immediately above the tear line, and there is a gap between the sewn portion of leather and the groove portion of the cover main body. The sewn part of leather may be the starting point of peeling of the skin material.

  Then, this invention aims at suppressing peeling of the skin material from a cover main body at the time of air bag deployment.

An air bag cover according to the present invention comprises a cover body that covers a folded air bag, and a skin material that covers the outer surface of the cover body. The cover main body is a door planned part divided by the part to be fractured and the hinge part, and a wood groove formed on the outer surface of the cover main body for processing the surface material into a grain so as to be inserted from the outer surface side of the cover main body And. The grated groove is located outward of the planned door portion, and at least a portion of the grated groove is formed in parallel along the hinge portion.

  In the air bag cover according to the present invention, the wood grained groove into which the end portion of the skin material is inserted is positioned outward of the planned door portion, and at least a part thereof is formed in parallel along the hinge portion. As a result, when the air bag expands and the planned door portion pivots about the hinge portion, the cover main body deforms in the direction in which the groove width of the wood groove narrows, and the end of the surface material and the wood groove Interfere strongly.

  Therefore, in the airbag cover according to the present invention, the skin material is firmly sandwiched in the wood-embedded groove by the stress generated by the expansion force of the airbag, and the peeling of the skin material can be suppressed.

FIG. 1 is a partially broken perspective view showing a steering wheel provided with an airbag cover according to an embodiment of the present invention. It is a front view of an air bag cover concerning an embodiment of the present invention. It is sectional drawing by the AA line of FIG. (A) is a partially broken perspective view showing the main part of the cover main body, (b) is a plan view showing the main part of the cover main body, (c) is a cross-sectional view taken along the line B-B of (b) is there.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In this embodiment, an air bag cover provided on a steering wheel of a car is illustrated.

  As shown in FIG. 1, the steering wheel 1 has a steering wheel main body 2. The steering wheel main body 2 includes a rim portion 3 which is a grip portion formed in an annular shape, a boss portion 4 positioned on the inner side of the rim portion 3, and a plurality of these rim portions 3 and the boss portion 4 In the embodiment, three spokes 5 are mainly included. An air bag cover 10 is provided at a central portion (a boss portion 4) of the steering wheel main body 2.

  As shown in FIGS. 1 to 3, the airbag cover 10 includes a cover main body (base material) 11 that covers a folded airbag (not shown), and a skin material 12 that covers the outer surface of the cover main body 11. Equipped with The surface material 12 is made of natural leather, synthetic leather, cloth, wood grain film or the like, and the two surface materials 12 and 12 are provided (bonded) so as to cover the entire outer surface of the cover main body 11 ).

  The cover body 11 is made of a synthetic resin material. The cover main body 11 is integrally formed with a front plate portion 13 covering a part of the boss portion 4 and a vertical wall portion 14 provided to protrude on the back surface (inner surface) of the front plate portion 13. The vertical wall portion 14 is formed on the back surface of the front plate portion 13 so as to be located outside the planned door portion 19 described later. Then, an air bag storage portion 15 for storing the folded air bag is defined in a portion surrounded by the front plate portion 13 and the vertical wall portion 14 of the cover main body 11, and the surface (outer surface) of the front plate portion 13 An emblem 16 as a decorative member is disposed at the central portion.

  A breakable portion 17 and a hinge portion 18 are formed on the back surface of the cover main body 11 (front plate portion 13), and a plurality of (four in the present embodiment) door planned portions 19 are formed by the breakable portion 17 and the hinge portion 18. Are divided. The portion to be fractured 17 is also referred to as a tear groove, a tear line or the like, and is recessed to a predetermined depth on the back surface of the front plate portion 13 so as to be more fragile than the other portions of the front plate portion 13 Is formed. On the other hand, the hinge portion 18 is also referred to as a hinge groove, a hinge line or the like, and is recessed to a predetermined depth shallower than the portion to be fractured 17, and the time the door portion 19 is expanded outward It is configured to be a dynamic axis. When the air bag is deployed, the cover body 11 is pressed from the inside by the air bag, so that the cover body 11 is broken with the to-be-ruptured portion 17 provided on the cover body 11 as a base point, and the to-be-doord portion 19 is hinged. It is designed to open as a pivot.

  On the surface of the cover main body 11 (front plate portion 13), at a position in the vicinity of the outer edge portion of the planned door portion 19, a grained groove 20 for graining the surface material 12 is formed. The grated groove 20 is located outward of the planned door portion 19 and formed in parallel along the planned rupture portion 17 and the hinge portion 18. That is, the grated groove 20 extends on the surface of the front plate portion 13 so as to surround the periphery of the planned door portion 19. Further, the wood-embedded groove 20 is positioned straddling the vertical wall portion 14 on the surface of the front plate portion 13 and the outer side of the vertical wall portion 14. The grated groove 20 is not a so-called character line (groove on the design) but a groove for inserting the end portion of the surface material 12 and therefore has a certain degree of depth, and is at least more than the hinge portion 18 It is formed to be deep.

  As shown in FIG. 3 and FIG. 4, the grated groove 20 has a pair of inner wall portions 20 a and 20 a facing each other and a bottom wall portion 20 b. On the inner wall portion 20 a of the wood-grained groove 20, a protrusion 21 which protrudes inward of the wood-grained groove 20 is formed. The protrusion 21 formed on one of the inner walls 20 a of the pair of inner walls 20 a and the protrusion 21 formed on the other inner wall 20 a do not overlap in the extending direction of the wood groove 20. Placed in position. That is, in the protrusion 21, the protrusion 21 formed on one inner wall 20 a and the protrusion 21 formed on the other inner wall 20 a are alternately arranged.

  Then, the end portions of the two skin materials 12, 12 are inserted into the wood-grained groove 20 (grained in), so that the end parts of the two skin materials 12, 12 are a pair of inner wall portions 20 a of the wood-grained groove 20, It is held between 20a.

  Below, the effect by this embodiment is demonstrated.

  (1) The airbag cover 10 according to the present embodiment includes the cover main body 11 that covers the folded airbag, and the surface material 12 that covers the outer surface of the cover main body 11. The cover main body 11 has a door planned portion 19 partitioned by the planned portion to be broken 17 and the hinge portion 18, and a grained groove 20 formed on the outer surface of the cover body 11 for graining the surface material 12. The grated groove 20 is located outward of the scheduled door portion 19 and at least a portion thereof is formed in parallel along the hinge portion 18.

  In the air bag cover 10 according to the present embodiment, the grated groove 20 into which the end portion of the surface material 12 is inserted is located outside of the planned door portion 19 and at least a portion is formed parallel along the hinge portion 18 Be done. As a result, when the air bag expands and the planned door portion 19 pivots about the hinge portion 18, the cover main body 11 is deformed in the direction in which the groove width of the grained groove 20 narrows, and the end of the surface material 12 The part and the grated groove 20 strongly interfere with each other.

  Therefore, in the airbag cover 10 according to the present embodiment, the skin material 12 is firmly sandwiched in the wood-embedded groove 20 by the stress generated by the expansion force of the airbag, and the peeling of the skin material 12 can be suppressed.

  In addition, even when the end portions of the surface material 12 are not sewn, since the end portions of the surface material 12 and the wood-embedded groove 20 strongly interfere with each other when the airbag is deployed, the end portions of the surface material 12 are simply sewn It is possible to reduce or eliminate sewing costs.

  Furthermore, the end portions of the wood-grained groove 20 and the wood-grained surface material 12 become an accent on the design, and a high-class image can be given to the occupants of the vehicle, etc., so that the designability is also excellent.

  (2) The cover main body 11 has a vertical wall portion 14 formed on the inner surface of the cover main body 11 so as to be positioned outward of the planned door portion 19, and the wood groove 20 is positioned immediately above the vertical wall portion 14. Or, it is located outward of the vertical wall portion 14.

  In order to secure the strength of the cover main body 11 (air bag cover 10), providing the wood grained groove 20 immediately above the vertical wall portion 14 in the cover main body 11 or providing the wood grated groove 20 outside the vertical wall portion 14 in the cover main body 11 Act in an advantageous manner. On the other hand, providing the wood groove 20 immediately above the hinge portion 18 in the cover main body 11 reduces the strength of the hinge portion 18, and providing it inward of the planned door portion 19 in the cover main body 11 means planned door The strength of the part 19 will be reduced.

  (3) The woodgrain groove 20 has a pair of inner wall parts 20a, 20a opposed to each other, and the inner wall part 20a is formed with a projection 21 projecting inward of the wood grain groove 20.

  By forming the projection 21 on the inner wall 20a of the wood-embedded groove 20, the stress generated by the expansion force of the air bag is intensively applied to the projection 21, and the floating of the end of the surface material 12 can be suppressed. .

  (4) The protrusion 21 formed on one inner wall 20a of the pair of inner walls 20a and 20a and the protrusion 21 formed on the other inner wall 20a It is arranged in the position which does not overlap.

  Since the protrusions 21 sandwich the end portion of the skin material 12 in a zigzag manner by the arrangement of the protrusions 21, it is possible to sandwich the skin material 12 in the grain groove 20 while applying tension in the extending direction of the wood groove 20. The floating of the skin material 12 can be suppressed more effectively.

  The air bag cover of the present invention has been described by way of example in the above embodiment, but the present invention is not limited to this embodiment and various other embodiments can be adopted without departing from the scope of the present invention.

  Although the air bag cover provided on the steering wheel has been illustrated in the above embodiment, the present invention is not limited to this, and can be applied to an air bag cover provided on an instrument panel or the like in front of the passenger seat is there.

  In the embodiment described above, the protrusion 21 formed on one of the pair of inner walls 20a and 20a and the protrusion 21 formed on the other inner wall 20a It is assumed that they are disposed at non-overlapping positions in the extending direction. However, the present invention is not limited to this, and the protrusion 21 formed on one inner wall 20 a of the pair of inner walls 20 a and 20 a and the protrusion 21 formed on the other inner wall 20 a It may be arranged to face each other at the same position in the extending direction. Alternatively, the protrusion 21 may be provided only on one of the inner walls 20a of the pair of inner walls 20a and 20a, and the protrusion 21 may not be provided on the other inner wall 20a.

DESCRIPTION OF REFERENCE NUMERALS 10 air bag cover 11 cover main body 12 surface material 17 fracture expected portion 18 hinge portion 19 door expected portion 20 wood groove 21 protrusion

Claims (4)

A cover body that covers the folded airbag;
And a skin material that covers the outer surface of the cover body,
The cover main body is a door planned part divided by the part to be fractured and the hinge part, and a wood groove formed on the outer surface of the cover main body for processing the surface material into a grain so as to be inserted from the outer surface side of the cover main body And have
The air bag cover is characterized in that the wood grain groove is located outward of the planned door portion, and at least a part of which is formed in parallel along the hinge portion. The cover body has a vertical wall portion formed on the inner surface of the cover body so as to be positioned outward of the planned door portion,
The air bag cover according to claim 1, wherein the grained groove is located immediately above the vertical wall or is located outward of the vertical wall. The grated groove has a pair of inner wall portions facing each other,
The air bag cover according to claim 1 or 2, wherein the inner wall portion is formed with a projection that protrudes inward of the wood-embedded groove. The protrusion formed on one of the inner wall portions of the pair of inner wall portions and the protrusion formed on the other inner wall portion are disposed at positions not overlapping with the extending direction of the wood grained groove. The airbag cover according to claim 3, characterized in that

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