JP2018122611A - Side airbag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side airbag device for a vehicle seat, which can temporarily hold an airbag unit and a guide plate with a simple structure.SOLUTION: A side airbag device 3 for a vehicle sear S comprises an airbag unit 4 including a first fastening part 44 that is fastened to a side frame 2, and a guide plate 5 including a reference hole 52 into which the first fastening part 44 can be inserted. The reference hole 52 includes a first edge part 52a protruding from a peripheral edge part integrally toward the center direction of the reference hole 52. When the first fastening part 44 is inserted, the first edge part 52a is deformed by a push due to the first fastening part 44 so that the first fastening part 44 can be inserted, and the first edge part tightens the first fastening part 44 by elastic force so that the airbag unit 4 and the guide plate 5 can be held temporarily.SELECTED DRAWING: Figure 7

Description

The present invention relates to a side airbag device for a vehicle seat.

  2. Description of the Related Art Conventionally, a side airbag that protects an occupant by inflating and deploying an airbag between a passenger and a passenger compartment side such as a door from a side outside the seat back in a vehicle side collision in a vehicle seat. Some devices are installed (see, for example, Patent Document 1).

  In Patent Document 1, an airbag unit including a folded airbag is provided along the side frame of the seat back on the inside of the side portion of the seat back on the door side. In a side airbag device for a vehicle seat that is bulged and deployed forward to protect an occupant, a vertical plate whose vertical length is substantially the same as that of the airbag unit between the airbag unit and the side frame. A guide plate that guides the bulging and unfolding direction forward when the airbag is activated is installed with its plate surface along the front-rear direction.

The airbag can be surely inflated and deployed forward by the guide plate guidance at the time of a side collision of the vehicle, and passenger safety can be improved.

JP 2009-35089 A

  By the way, in order to assemble the airbag unit to the side frame, the airbag unit is first assembled to the guide plate. In the airbag unit, each bolt member is inserted into the through hole of the guide plate, and the inner surface of the airbag unit on the side frame side is overlapped with the guide plate to fix the crimping pin in the crimping hole of the guide plate.

  However, in the above-described assembly method for assembling the airbag unit to the side frame, it is necessary to set a crimping hole in the guide plate and a crimping pin in the airbag unit in order to fix the guide plate to the airbag unit. Further, it is necessary to insert a caulking pin into the caulking hole and perform caulking processing, which may increase the manufacturing cost.

  The present invention solves the above-described problems, and an object thereof is to provide a side airbag device for a vehicle seat that can temporarily hold an airbag unit and a guide plate with a simple structure.

<Explanation of Claim 1>
In the side airbag device for a vehicle seat according to the present invention, an airbag unit including a folded airbag is provided inside a side portion of the seat back of the vehicle seat via a guide plate. A side airbag device for a vehicle seat provided along
The airbag unit includes a first fastening portion that fastens to the side frame,
The guide plate includes a reference hole through which the first fastening portion can be inserted,
The reference hole includes a first edge that protrudes integrally from the peripheral portion toward the center of the reference hole,
When the first edge is inserted through the first fastening portion, the first edge is deformed so that the first fastening portion can be inserted by being pushed by the first fastening portion, and the first fastening portion is fastened by elastic force, whereby the airbag unit and the guide A side airbag device for a vehicle seat that can temporarily hold a plate.

One of a plurality of existing bolt members fastened to a side frame provided in the airbag unit is used as a first fastening portion, and the first of the plurality of assembly holes through which the bolt members provided in the guide plate are inserted. An assembly hole corresponding to one fastening portion is used as a reference hole, and the reference hole includes a first edge portion that protrudes integrally from the peripheral portion toward the center of the reference hole. When the first edge is inserted through the first fastening portion, the first edge is deformed so that the first fastening portion can be inserted by being pushed by the first fastening portion, and the first fastening portion is fastened by elastic force, whereby the airbag unit and the guide The plate can be temporarily held.

  As a result, the airbag unit and the guide plate can be temporarily held only by inserting the first fastening portion provided in the airbag unit through the reference hole formed in the guide plate.

  Therefore, in the side airbag device for a vehicle seat according to the present invention, the airbag unit and the guide plate can be temporarily held with a simple structure.

<Explanation of Claim 2>
In the vehicle seat side airbag device according to the present invention, the airbag unit includes a substantially cylindrical second fastening portion fastened to the side frame,
The guide plate has an escape hole through which the second fastening portion can be inserted,
The relief hole is a substantially rectangular shape having a long side parallel to a direction connecting the first fastening portion and the second fastening portion, and a short side extending in a direction perpendicular to the long side, and the long side is the second fastening portion. It is larger than the outer diameter, and the short side has a hole shape smaller than the outer diameter of the second fastening portion,
The long side is composed of a deformation promoting portion that enables elastic deformation of the long side, and a second edge formed between the deformation promoting portion,
The second edge portion is pushed by the second fastening portion when the second fastening portion is inserted, and is deformed so that the second fastening portion can be inserted, and the second fastening portion is fastened by an elastic force, whereby the airbag unit and the guide The side airbag device for a vehicle seat according to claim 1, wherein the plate can be temporarily held.

  In such a configuration, one of the two assembly holes of the guide plate is a reference hole, the other is a relief hole, one of the two bolt members of the airbag unit is a first fastening portion corresponding to the reference hole, and the other is A second fastening portion corresponding to the relief hole is used, the reference hole of the guide plate is temporarily held with the first fastening portion of the airbag unit, and the relief hole of the guide plate is temporarily held with the second fastening portion of the airbag unit. Thus, the guide plate and the airbag unit can be temporarily held at two locations, and a stronger holding force than that at one location can be provided.

  Further, in the above configuration, the escape hole is a substantially rectangular shape having a long side parallel to the direction connecting the first fastening portion and the second fastening portion, and the long side is set larger than the outer shape of the second fastening portion. A second edge portion and a deformation promoting portion formed so as to sandwich the second edge portion are provided. Thereby, the 2nd edge part is pushed by the 2nd fastening part at the time of inserting the 2nd fastening part in the escape hole, is deformed so that the 2nd fastening part can be inserted, and tightens the 2nd fastening part by elastic force The airbag unit and the guide plate can be temporarily held by being pushed by the first fastening portion.

<Explanation of Claim 3>
In the vehicle seat side airbag device according to the present invention, the deformation promoting portion is a notch formed in the vicinity of the short side provided on the long side. .

In such a configuration, the deformation promoting portion is a notch formed in the vicinity of the short side of the long side, and in the region sandwiched by the notch of the long side, when the second fastening portion is inserted into the escape hole, Enlarged deformation of the distance between the long sides is facilitated by being pushed by the second fastening portion. In addition, by forming the notch in the vicinity of the short side of the long side, even if the dimension between the first fastening part and the second fastening part varies, the notch replaces the second fastening part with the first fastening part and the second fastening part. It can be set as the arrangement | positioning inserted in the direction which connects a fastening part.

1 is a side view of a side airbag device for a vehicle seat to which the present invention is applied. It is an expanded sectional view which follows the II-II line of FIG. It is a principal part perspective view which shows the assembly | attachment procedure of a side airbag apparatus. It is a perspective view of the vehicle seat provided with the side airbag apparatus. It is an enlarged view of the assembly hole of a guide plate. It is a principal part enlarged view of a side airbag apparatus. It is an expanded sectional view which follows the VII-VII line of FIG. It is an expanded sectional view which follows the VIII-VIII line of FIG.

An embodiment in which the present invention is applied to the side airbag device 3 provided on the side portion of the seat back 1 of the vehicle seat S shown in FIG. 4 will be described. As shown in FIGS. 1 to 3, the side airbag device 3 of the present invention has a configuration in which a guide plate 5 made of a metal plate is assembled to an airbag unit 4, and this is used as the vehicle exterior side of the seat back 1. It is set as the structure assembled | attached to the side frame 2 of the up-down direction.

  The side frame 2 constitutes a vertical frame portion of a seat back frame (a part of which is shown in FIG. 3) formed in a frame shape which is a skeleton member of the seat back 1, and is made of a metal plate having a width in the front and rear direction. In this structure, the lower half 2a and the upper half 2b made of a pipe material thinner than the width of the lower half 2a are vertically connected. The lower half 2a of the side frame 2 is curved in a bow shape with its upper and lower intermediate positions projecting forward from the lower end upward, and the front edge is gradually tapered toward the rear and the rear edge. The upper end is connected to the pipe-like upper half 2b. The upper half 2b of the side frame 2 is integrally formed with legs of an upper frame made of a pipe material bent into a downward U-shape at the top of the seat back frame.

  The airbag unit 4 includes a folded airbag 40 (FIG. 1 shows its deployed state) and a gas generator (not shown) that feeds the gas that deploys the airbag 40 in a thin state that is easily broken when the airbag 40 is deployed. A vertically long shape in a cloth bag. The airbag unit 4 incorporates the gas generator. The airbag unit 4 has two upper and lower bolt members 43 projecting toward the side frame 2 side. The gas generator includes an inflator that generates gas and a retainer that covers the inflator. The bolt member 43 protrudes from the gas generator, but there is one that protrudes only from the inflator, one that protrudes only from the retainer, and one that protrudes from both the inflator and the retainer. In some cases, the gas generator includes only an inflator that does not include a retainer. In this case, the bolt member 43 projects from the inflator.

  The airbag unit 4 includes a bag that is inflated to protect the airbag unit 4 from the waist portion to the shoulder portion of the occupant when deployed.

  The guide plate 5 is provided on the inner side surface of the airbag unit 4 facing the side frame 2, and is formed of a metal plate that is vertically long along the inner side surface and is directed in the front-rear direction. The guide plate 5 is formed with two assembly holes 51 through which the bolt member 43 of the airbag unit 4 is inserted and the guide plate 5 and the airbag unit 4 can be temporarily held.

  In order to assemble the airbag unit 4 to the side frame 2, first, the airbag unit 4 is assembled to the guide plate 5. The airbag unit 4 inserts and temporarily holds the bolt members 43 through the assembly holes 51 of the guide plate 5. Here, the temporary holding refers to holding to such an extent that even if the air bag unit 4 and the guide plate 5 are only assembled, even if transportation or the like is performed, the assembly is not removed.

  The temporary holding mechanism will be described in detail with reference to FIGS. 5 to 8. One of the two assembly holes 51 of the guide plate 5 is a reference hole 52 and the other is a relief hole 53, and the two bolt members of the airbag unit 4 are used. One of 43 is a first fastening portion 44 corresponding to the reference hole 52, and the other is a second fastening portion 45 corresponding to the escape hole 53.

The reference hole 52 is a substantially circular hole, and is a first edge portion in which four peripheral portions are formed in an equiangular manner with respect to the center of the reference hole 52 so as to project integrally toward the center of the reference hole 52. It is set as the hole shape provided with 52a. Further, the distance between the first edge portions 52 a facing each other is set smaller than the outer diameter 44 </ b> D of the first fastening portion 44. Thereby, when the 1st fastening part 44 penetrates the reference hole 52, the 1st edge part 52a is deformed so that the distance between the 1st edge parts 52a may be expanded by the 1st fastening part 44, The first fastening portion 44 can be inserted, and the deformed first edge portion 52a fastens the first fastening portion 44 by elastic force.

In the present embodiment, the reference hole 52 is a substantially circular hole, and four peripheral portions are formed so as to project integrally toward the center of the reference hole 52 at an equal angle with respect to the center of the reference hole 52. However, the projecting portion may be equiangular with respect to the center of the reference hole 52, and may have three or two locations. The hole shape which made the part protrude may be sufficient.

  Next, the mechanism for temporarily holding the relief hole 53 and the second fastening portion 45 will be described in detail. The relief hole 53 has a long side 54 parallel to the direction connecting the first fastening portion 44 and the second fastening portion 45, and a long side. The long side 54 is larger than the outer diameter 45D of the second fastening portion 45, and the short side 55 is smaller than the outer diameter 45D of the second fastening portion 45. The shape of the hole was as follows. The long side 54 includes a second edge portion 54a and a deformation promoting portion 56 disposed at a position sandwiching the second edge portion 54a. Thereby, when inserting the 2nd fastening part 45 in the escape hole 53, the 2nd edge part 54a is pushed by the 2nd fastening part 45, and enlarges the distance between the 2nd edge parts 54a which oppose. By deforming, the first fastening portion 44 can be inserted into the escape hole 53, and the deformed second edge portion 54a fastens the second fastening portion 45 by elastic force.

The deformation promoting portion 56 is a cutout portion 57 in which a part of the long side 54 is cut out in a direction orthogonal to the long side 54. By making the deformation promoting part 56 into the notch part 57, the notch part 57 can be formed at the same time when the assembly hole 51 is formed in the guide plate 5. There is no need to add a process. In the present embodiment, only the notch portion 57 is shown as the deformation promoting portion 56, but the slit formed on the long side 54 that facilitates deformation so as to increase the distance between the opposing second edge portions 54a. It may be. Further, by setting the long side 54 to be larger than the outer shape 45D of the second fastening portion 45, even if the dimension between the first fastening portion 44 and the second fastening portion 45 varies, the variation can be allowed and temporary holding can be performed. It becomes possible.

  Further, the bolt member 43 is threaded so that a nut member can be attached. When the airbag unit 4 and the guide plate 5 are assembled, the second edge 54a is more than at least one thread. It will be located on the airbag unit 4 side. Thereby, even if it is going to remove the airbag unit 4 and the guide plate 5, a thread will stand on the removal locus | trajectory of the long side 54. FIG.

The airbag unit 4 assembled to the guide plate 5 in this way is assembled to the side surface on the outer side of the side frame 2 integrally with the guide plate 5 in a vertical and slightly rearward posture. The assembly structure is such that the guide plate 5 is superimposed on the lower half 2a of the side frame 2, the bolt member 43 of the airbag unit 4 passing through the guide plate 5 is passed through the through hole of the side frame 2, and the nut member is fastened thereto. Fixed.

The airbag unit 4 is covered with a cushion material 11 of the seat back 1 and a skin material 12 that covers the surface of the airbag unit 4 and the side frame 2. In the cushion material 11, a thin portion 111 that is easily broken by the airbag 40 that is inflated when the airbag is operated is set immediately before the airbag unit 4. Corresponding to the thin portion 111 of the cushion material 11, the skin material 12 is provided with a stitched portion 121 that is easily broken by the operation of the airbag.

According to the side airbag device 3 of the present embodiment, the guide plate 5 can be temporarily held by the airbag unit 4 only by inserting the bolt member 43 of the airbag unit 4 into the assembly hole 51 of the guide plate 5. It becomes possible, and it is not necessary to add a process for temporary holding separately, and productivity can be improved. In addition, dimensional variation between the first fastening portion 44 and the second fastening portion 45 is allowed and can be temporarily held. That is, high accuracy is not required for the dimension between the first fastening portion 44 and the second fastening portion 45. This also leads to cost reduction.

S ... Vehicle seat 1 ... Seat back 2 ... Side frame 2a ... Lower half 2b ... Upper half 3 ... Side airbag device 4 ... Air bag unit 40 ... Air bag 43 ... Bolt member 44 ... First fastening portion 44D ... First fastening portion outer diameter 45 ... second fastening portion 45D ... second fastening portion outer diameter 5 ... guide plate 51 ... assembly hole 52 ... reference hole 52a ... first edge 53 ... relief hole 54 ... long side 54a ... second edge 55 ... short side 56 ... deformation promoting part 57 ... notch

Claims (3)

A side airbag device for a vehicle seat in which an airbag unit including a folded airbag is provided along a side frame of the seat back via a guide plate inside a side portion of the seat back of the vehicle seat. Because
The airbag unit includes a first fastening portion that fastens to the side frame,
The guide plate includes a reference hole through which the first fastening portion can be inserted,
The reference hole includes a first edge that protrudes integrally from a peripheral portion toward the center of the reference hole,
When the first edge is inserted through the first fastening portion, the first edge is pushed by the first fastening portion to deform the first fastening portion, and the first fastening portion is fastened by elastic force, A side airbag device for a vehicle seat capable of temporarily holding the airbag unit and the guide plate. The airbag unit includes the substantially cylindrical second fastening portion fastened to the side frame,
The guide plate includes an escape hole through which the second fastening portion can be inserted,
The escape hole is a substantially rectangular shape having a long side parallel to a direction connecting the first fastening portion and the second fastening portion, and a short side extending in a direction perpendicular to the long side, and the long side is It is larger than the outer diameter of the second fastening part, and the short side has a hole shape smaller than the outer diameter of the second fastening part,
The long side is composed of a deformation promoting portion that enables elastic deformation of the long side, and a second edge formed between the deformation promoting portion,
When the second edge is inserted through the second fastening part, the second edge is pushed by the second fastening part to deform the second fastening part, and the second fastening part is fastened by elastic force, The side airbag device for a vehicle seat according to claim 1, wherein the airbag unit and the guide plate can be temporarily held.   The side airbag device for a vehicle seat according to claim 2, wherein the deformation promoting portion is a notch formed in the vicinity of the short side provided on the long side.

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