JP2015042517A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to positionally fix a back board to a module case of an air bag unit so as not to block an extension path of an air bag.SOLUTION: The present invention provides a seat 1 for a vehicle in which an air bag unit 10 is attached to a side part of a seat back 2 on a vehicle outer side, and a back board 2B is attached to a back part of the seat back 2. The air bag unit 10 is so configured that an outer wall part 12A of a module case 12 including an air bag module 11 thereof is pushed and developed outwards at the time of expansion and extension of the air bag. The back board 2B is provided in the state such that movement thereof in a seat width direction with respect to the module case 12 is restricted by fitting of an edge part 2Ba thereof on a vehicle outer side into a recess 12D which is formed in a wall part (a posterior wall part 12C) different from the outer wall part 12A of the module case 12.

Description

  The present invention relates to a vehicle seat. Specifically, the present invention relates to a vehicle seat in which an airbag unit is attached to an outer peripheral portion of a seat back and a back board is attached to a back portion of the seat back.

  2. Description of the Related Art Conventionally, a vehicle seat is known in which an airbag unit is provided on a side of a seat back outside the vehicle (Patent Document 1). In the airbag unit, a module case that houses the airbag module is attached to an outer portion of a side frame outside the seat back of the vehicle by a fastening structure including a bolt and a nut. Further, a resin backboard is provided on the back portion of the seat back so as to cover the back of the seat back. The backboard is formed in a state in which the left and right edges are curved forward, and covers a part of both outer side surfaces of the seatback. Specifically, the outer edge of the backboard is attached to a bracket that functions as a module case of the airbag unit and is fixed in position.

JP 2010-184668 A

  However, in the above-described prior art, the edge of the backboard on the vehicle outer side is provided in a state of covering the module case (bracket) from the vehicle outer side, so that the airbag deployment path is easily obstructed. The present invention was devised as a solution to the above problem, and the problem to be solved by the present invention is to provide a module case of an airbag unit with a backboard so as not to obstruct the deployment path of the airbag. The purpose is to be able to fix the position.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
A first invention is a vehicle seat in which an airbag unit is attached to an outer peripheral portion of a seat back and a back board is attached to a back portion of the seat back. The airbag unit is configured such that a specific wall portion of a module case containing the airbag module is pushed open when the airbag is inflated and deployed. A part of the backboard is fitted into a fitting portion formed on a wall portion different from a specific wall portion of the module case, so that the movement in the seat width direction is restricted with respect to the module case. Is provided.

  According to the first aspect of the invention, the fitting portion is formed on the wall portion different from the specific wall portion to be pushed open of the module case, so that the backboard is modularized so as not to obstruct the airbag deployment path. It can be attached to the case in a position fixed in the sheet width direction.

  The second invention is the following configuration in the first invention described above. The airbag unit is provided on the side portion of the seat back, and the wall portion outside the seat of the module case is pushed open to the outside of the seat so that the airbag is inflated and deployed on the front side of the seat. The fitting part is provided in the rear side part of the module case.

  According to the second aspect of the invention, the backboard can be attached in a state in which the position of the backboard is fixed in the seat width direction with respect to the module case so as not to hinder the airbag deployment path.

  The third invention is the following configuration in the second invention described above. The fitting portion is a recess formed in the rear side portion of the module case, and the edge of the backboard is fitted in the recess.

  According to the third aspect of the present invention, the end portion (edge) of the backboard can be attached to the module case in the seat width direction without projecting the backboard from the airbag unit to the seat outer side. The terminal portion (edge) of the backboard can be provided with good appearance so that there is no gap between the module case and the terminal portion.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is the II-II sectional view taken on the line of FIG. It is sectional drawing which shows a mode that the edge part of a backboard is attached to the fitting part of a module case. It is sectional drawing which shows the principal part structure of the vehicle seat of Example 2. FIG. It is sectional drawing which shows a mode that the edge part of a backboard is attached to the fitting part of a module case. FIG. 6 is a cross-sectional view showing a main part structure of a vehicle seat of Example 3.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the seat 1 (vehicle seat) according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the seat 1 of this embodiment is configured as a passenger seat of an automobile, and includes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, and a seat back 2. The headrest portion 4 is a headrest portion formed on the upper portion, and has a head-rest shape. An air bag unit 10 that protects an occupant from a collision when a side collision of the vehicle occurs is attached to a side portion of the vehicle outer side that is the right side of the above-described seat back 2 in the drawing. In the airbag unit 10, when a side collision of the vehicle occurs, the airbag module 11 provided therein receives an electrical signal from the ECU of the vehicle and ignites explosives with an inflator so that the airbag is placed on the side of the seated occupant. It has a configuration of a known side airbag that is deployed so as to be inflated toward the side portion.

  The airbag unit 10 described above is provided by being attached to an outer surface portion 2Fa of a side frame 2F that forms a skeleton of the side portion of the seat back 2 on the vehicle outer side (see FIG. 2). Specifically, the airbag unit 10 is provided with a resin module case 12 that encloses the airbag module 11 attached to the outer surface portion 2Fa of the side frame 2F described above from the outside. The module case described above is formed in a vertically long box shape, and is formed in a shape having a long cross-sectional shape in the front-rear direction as shown in FIG. The module case 12 described above is attached to the side frame 2F by attaching two stud bolts 12F arranged in the height direction integrally attached to the rear region of the inner wall portion 12B of the module case 12 to the side frame. After passing through the outer surface 2Fa of 2F, the nut 12G is fastened from the inside of the side frame 2F to the end of each threaded stud bolt 12F.

  As shown in FIG. 3, the edge 2Ba on the vehicle outer side of the backboard 2B that covers the rear surface of the seat back 2 from the rear side is inserted from the rear side of the seat into the mounted module case 12 in the width direction. The position is fixed to the position. By this position fixing, the backboard 2B is fixed so that there is no space between the module case 12 and the seat 2 in the seat width direction of the edge 2Ba outside the vehicle. It is set as the state hold | maintained in the state which covered the back of the back | bag 2 finely.

  Hereinafter, the structure in which the vehicle outer edge 2Ba of the backboard 2B described above is fitted into the module case 12 and fixed in position will be described in detail together with the basic structure of the seat back 2. First, the configuration of the seat back 2 will be described. As shown in FIG. 2, the seat back 2 is assembled so as to be covered with a metal back frame (not shown) that forms a skeleton inside the seat back 2 and a front portion of the back frame. The foamed urethane back pad 2P that receives and absorbs the load of the seated occupant, the cloth back cover 2C that covers the entire surface of the back pad 2P, and the back of the seat back 2 are covered. And a resin backboard 2B attached from the rear side.

  The above-described back frame (only some of the side frames 2F are illustrated) is configured to be assembled in a reverse U-shape in a front view that forms a skeleton along the outer peripheral shape of the seat back 2, and the illustrated seat back The above-described airbag unit 10 is attached to a side frame 2F (outer peripheral portion) that forms a skeleton of the side portion of the vehicle outer side. The above-mentioned side frame 2F is formed of a single vertically long steel plate material, and the front edge and the rear edge thereof are bent in two stages on the inside of the sheet, respectively, so that the edges are It is formed in a shape folded toward the inside of the sheet shape so as not to stand toward the outside of the sheet shape.

  Specifically, the side frame 2F includes an outer surface portion 2Fa that faces the outside of the seat, a front surface portion 2Fb that is bent inward from the front edge of the outer surface portion 2Fa, and a rear surface portion 2Fa. And a rear surface portion 2Fc bent from the side edge to the inside of the sheet. The front surface portion 2Fb was bent from the front edge of the outer surface portion 2Fa to an oblique angle facing the front side of the sheet to the inside of the sheet, and then further bent to an oblique angle where the middle portion was directed to the rear side of the sheet. It is formed in a shape folded in two steps. Thereby, the front surface portion 2Fb is a surface portion (side support portion 2Ps) that obliquely supports the body of a seated occupant of the back pad 2P, which will be described later, by an oblique surface portion that faces the front side inside the seat that is bent at the second stage. ) In a shape that can be supported by the surface straight from the diagonally rear side. Then, the front surface portion 2Fb is folded toward the inner side of the sheet shape so that the bent edge portion is directed toward the rear side of the inner side of the sheet so that the edge does not stand toward the outer side of the sheet shape. It is formed into a shape.

  On the other hand, after the rear surface portion 2Fc is bent at a substantially right angle from the rear edge of the outer surface portion 2Fa to the inside of the sheet, the bent end portion is further inclined at an oblique angle toward the front side of the sheet. It is formed into a folded shape that is folded in two stages. The above-described rear surface portion 2Fc has a shape in which the width from the bent portion of the first step to the bent portion of the second step is longer than the width of the front surface portion 2Fb. In this portion, the external force received from the rear side of the seat can be widely received and supported. In addition, the rear surface portion 2Fc has a bent front edge (rear edge) facing the front inside the seat so that the edge does not stand toward the outside of the sheet shape. It is formed in a shape folded toward the inside of the shape.

  Here, the inside and outside of the “sheet shape” described above mean the inside and outside of the sheet shape in the width direction, and also the inside and outside of the sheet shape in the front-rear direction. That is, when the above-described side frame 2F outside the vehicle is described as an example, the inner side of the seat shape in the side frame 2F is the outer side located on the outermost side in the width direction of the side frame 2F as viewed in FIG. The area on the right side of the figure from the surface portion 2Fa (the area sandwiched between the opposite side frame (not shown)) is the inner side in the width direction of the seat shape and is located on the outermost side in the front-rear direction of the side frame 2F. A region sandwiched between the front surface portion 2Fb and the rear surface portion 2Fc is the inner side in the front-rear direction of the sheet shape. The other region is the outside of the seat shape in the side frame 2F.

  The back pad 2P is formed by foam-molding a flexible polyurethane foam raw material, and is set on the front portion of the above-described back frame (not shown) (only some side frames 2F are shown), and then covers the entire surface. As described above, the cloth-made back cover 2C is placed and stretched from the front side, so that it is set in a state of being positioned at the front portion of the back frame by the stretching force of the back cover 2C.

  The back pad 2P has a mountain shape on the front side so that a portion that is hung on the front part of the left and right side frames of the back frame (only the side frame 2F outside the vehicle is shown) can support the back of the seated occupant from both outsides. It is formed as a side support portion 2Ps that swells greatly. These side support portions 2Ps are formed on the side frames (vehicles) by forming wires 2Ff (see FIG. 1) projecting forward from the front portions of the left and right side frames of the back frame (only the side frame 2F outside the vehicle is shown). Only the outer side frame 2 </ b> F is illustrated) and is supported from the rear side at a position protruding forward from the front side. By the support by these shaping wires 2Ff, each side support portion 2Ps can strongly support the back of the seated occupant from both outsides.

  Each of the side support portions 2Ps of the back pad 2P described above is bent back toward the rear of the seat so as to cover both outer side surface portions 2Fa of each side frame (only the side frame 2F outside the vehicle is shown). Is formed. However, the side support portion 2Ps outside the vehicle on the side where the airbag unit 10 is mounted has a partial width so that a part of the region covering the side frame 2F from the outside opens the mounting region of the airbag unit 10. It is made into the shape penetrated in the form penetrated in a direction (thickness direction) (through-hole 2Pa).

  As shown in FIG. 3, the back cover 2 </ b> C is attached to the back pad 2 </ b> P from the front side so as to cover the entire surface of the above-described back pad 2 </ b> P, and then the peripheral portion is drawn back to the back frame. By being attached to (only the side frame 2F on the outside of the vehicle is shown), a state of being stretched in a state of being pulled from both the left and right sides and the upper and lower sides so as to closely adhere to the entire surface of the back pad 2P Has been. Specifically, the left and right edges of the back cover 2C are fastened to the hooks 2Ca attached to the edges by the rear edge of each side frame (only the rear edge of the vehicle side frame 2F). By being hooked on (illustrated), it is fixed to each side frame.

  Further, the above-described back cover 2C is not placed on a portion of the back cover 2C that covers the side surface outside the vehicle on which the airbag unit 10 is mounted so that the back cover 2C does not cover the mounting region of the airbag unit 10. Similarly to the through-hole 2Pa formed in the pad 2P, a cut-out portion 2Cb cut out so as to partially penetrate in the width direction is formed so as to open the mounting area of the airbag unit 10.

  The backboard 2B is constructed from the rear side by using clips at various locations on a back frame (not shown) (not shown) after an airbag unit 10 to be described later is attached to the side frame 2F outside the vehicle. It is supposed to be plugged in and attached. The above-described backboard 2B is formed such that the left and right side edges (only the vehicle outer edge 2Ba is shown) are curved toward the front side of the seat, and each side frame (only the vehicle outer side frame 2F is shown). Is provided in a state of being applied from both outer sides to a side surface portion (back cover 2C covering the rear side region) of each side support portion 2Ps of the back pad 2P that covers the outer side from both outer sides.

  Specifically, as shown in FIG. 3, the backboard 2 </ b> B described above has an edge 2 </ b> Ba that covers the installation area of the module case 12 outside the vehicle formed on the wall 12 </ b> C on the rear side of the module case 12 described later. By being fitted into the recess 12D from the rear side, the position is fixed in the sheet width direction. The operation of fitting the outer edge 2Ba of the backboard 2B into the recess 12D of the module case 12 is performed by using the clip (not shown) of the backboard 2B described above for the back frame (only some side frames 2F are shown). In order to attach and attach to various places, it is performed together during the work of attaching to the back frame from the back side. By the fitting, the backboard 2B is held in a state of being positioned with a good appearance so that no gap is formed between the outer edge 2Ba of the vehicle and the module case 12. Here, the rear wall portion 12C of the module case 12 described above corresponds to the “wall portion different from the specific wall portion” of the present invention.

  Next, the configuration of the module case 12 of the airbag unit 10 will be described. As shown in FIG. 1, the module case 12 is formed in a vertically long box shape that accommodates the airbag module 11 therein, and the airbag module 11 inside the module case 12 is inflated and deployed as shown in FIG. 2. Stud bolts 12F protruding toward the inner side of the seat are integrally connected to two positions in the height direction on the inner wall portion 12B opposite to the outer wall portion 12A that is opened by breaking. It is the composition which was made. As shown in FIG. 2, the above-described module case 12 is formed by inserting the above-described stud bolts 12F into the side frames 2F and fastening them with the nuts 12G so that the inner wall portion 12B is the outer surface portion of the side frame 2F. It is in a state of being fixedly provided in a state where the surface is in wide contact with 2Fa.

  Then, when the module case 12 is assembled to the side frame 2F as described above, there is a protruding piece 12E that protrudes forward from the front outer edge of the box shape. Then, the back cover 2P is applied from the outside to the back cover 2C covered by the side support portion 2Ps outside the vehicle. As a result, the edge of the cutout portion 2Cb of the back cover 2C is covered with a good appearance from the outside so as not to be exposed to the outside by the protruding piece 12E. 2, when the airbag is inflated and deployed from the airbag module 11, the outer wall portion 12A is moved to the rear wall portion 12C by the deployment pressure. The break portion 12A1 at the joint with the front wall portion is broken with the joint portion as a fulcrum to be pushed outward. Here, the outer wall portion 12A described above corresponds to a “specific wall portion” of the present invention.

  Here, in the rear wall portion 12C of the module case 12, the recessed portion that can be fitted into the vehicle outer edge 2Ba of the backboard 2B described above from the rear side and fixed in the seat width direction. 12D is formed. The recess 12D is formed such that a groove shape opened to the rear side of the seat extends in the height direction. Specifically, the recess 12D is formed in a shape in which the cross section is tapered in a tapered manner on the front side by the outer slope 12D1 and the inner slope 12D2 that are inclined to the front side formed in the rear wall portion 12C. Has been. The opening width of the recess 12D formed by the outer slope 12D1 and the inner slope 12D2 is formed so as to be wider than the width (thickness) of the outer edge 2Ba of the backboard 2B. As a result, the recess 12D is formed on the vehicle outside of the backboard 2B from the wide opening formed by the outer slope 12D1 and the inner slope 12D2 when the vehicle outer edge 2Ba of the backboard 2B is fitted from the rear side of the seat. The edge 2Ba can be widely received inside.

  The recessed portion 12D moves and guides the vehicle outer edge 2Ba of the backboard 2B received in the opening toward the inner side of the recessed portion 12D by the inclined shape of the outer inclined surface 12D1 or the inner inclined surface 12D2. It is supposed to be. The recess 12D regulates the movement of the edge 2Ba in the seat width direction by applying the vehicle outer edge 2Ba of the backboard 2B to the outer slope 12D1 or the inner slope 12D2 in the recess 12D by the guidance. It is supposed to be kept in the state. In this embodiment, the backboard 2B is moved to the front side to the position where it is attached to the back frame (only some of the side frames 2F are shown) using the clip (not shown) described above. The edge 2Ba abuts on the outer slope 12D1 in the above-described recess 12D, and the backboard 2B is attached to the back frame by the clip (not shown) and is fixed to the outer slope 12D1, that is, in a state where it is fixed. The movement in the sheet width direction with respect to the module case 12 is held in a restricted state.

  The backboard 2B is moved forward to the mounting position using the clip (not shown) with respect to the back frame (only some of the side frames 2F are shown), whereby the outer edge 2Ba of the vehicle is removed. Is abutted against the outer slope 12D1 or the inner slope 12D2 in the recess 12D, and then is abutted and locked to both the outer slope 12D1 and the inner slope 12D2 by further movement of the backboard 2B. It may be softly formed so as to enter while being bent to a position. As described above, the vehicle outer edge 2Ba of the backboard 2B abuts and is engaged with both the outer slope 12D1 and the inner slope 12D2 in the recess 12D, so that the seat width of the vehicle outer edge 2Ba of the backboard 2B. Bidirectional movement of directions can be more effectively suppressed. The backboard 2B itself is attached to the back frame (only a part of the side frames 2F is shown) by the above-described clip (not shown), so that the movement in the seat width direction with respect to the back frame is regulated. It is supposed to be retained.

  The edge 2Ba on the vehicle outer side of the above-described backboard 2B can be housed in a recess 12D formed in the wall 12C on the rear side of the module case 12 by the above-described attachment. It is set as the state arrange | positioned in the area | region of 12C rear side. Therefore, even when the airbag is inflated and deployed and the outer wall portion 12A of the module case 12 is pushed outward, the backboard 2B and the backboard 2B are attached to the module case 12 on the push-out deployment path. Since there is no structure portion, the outer wall portion 12A of the module case 12 can be widely pushed open to a position where the airbag deployment path is not hindered without hindering the push-open movement.

  As described above, the seat 1 of the present embodiment has a configuration in which the airbag unit 10 is attached to the side portion (outer peripheral portion) of the seat back 2 outside the vehicle, and the back board 2B is attached to the back portion of the seat back 2. ing. The airbag unit 10 is configured such that an outer wall portion 12A (specific wall portion) of a module case 12 containing the airbag module 11 is pushed outward when the airbag is inflated and deployed. The backboard 2B is fitted into a recess 12D (fitting portion) formed in a rear wall portion 12C different from the outer wall portion 12A of the module case 12 in the vehicle outer edge portion 2Ba. The module case 12 is provided in a state in which movement in the sheet width direction is restricted.

  As described above, the recess 12D is formed on the rear wall portion 12C different from the outer wall portion 12A on which the module case 12 is pushed open, so that the backboard 2B can be mounted so as not to obstruct the airbag deployment path. The module case 12 can be attached in a state of being fixed in the sheet width direction. In addition, the backboard 2B can be attached to the module case 12 in a state in which the terminal portion (the vehicle outer edge 2Ba) is positioned in the seat width direction without projecting the backboard 2B from the airbag unit 10 to the seat outer side. The terminal portion of the backboard 2B (the vehicle outer edge 2Ba) can be provided with good appearance so that there is no gap between the module case 12 and the terminal portion.

  In addition, since the recess 12D is formed into a tapered cross-sectional shape by the outer slope 12D1 and the inner slope 12D2, the vehicle outer edge 2Ba of the backboard 2B can be inserted to a position where it abuts against either surface. The position of the edge portion 2Ba can be fixed in a state in which movement in both the seat width directions is restricted, and movement in the front-rear direction can also be restricted. Therefore, it is possible to more appropriately suppress the fluttering of the outer edge 2Ba of the backboard 2B.

  Next, the configuration of the seat 1 of Example 2 (vehicle seat: see FIG. 1 for the configuration of the seat 1) will be described with reference to FIGS. In the present embodiment, the vehicle outer edge portion 2Ba of the backboard 2B can be fitted from the rear side to the vehicle outer edge portion of the rear wall portion 12C of the module case 12, and the position can be fixed in the seat width direction. A fitting portion 12H having a recess 12H1 is formed so as to protrude to the rear side of the seat. The fitting portion 12H has the same edge portion by inserting the vehicle outer edge 2Ba of the backboard 2B from the rear side of the seat into a recess 12H1 formed on the rear surface portion protruding rearward of the seat. 2Ba can be held in a fixed state in the sheet width direction. The recess 12H1 is formed in a shape that allows the vehicle outer edge 2Ba of the backboard 2B to be loosely fitted, and by fitting the edge 2Ba into the interior thereof, the edge 2Ba is formed in the seat width direction. The position can be held so as not to rattle. Further, the depth of the recess 12H1 is deeper than the depth at which the vehicle outer edge 2Ba of the backboard 2B is fitted, and does not hinder the fitting of the vehicle outer edge 2Ba of the backboard 2B. The fitting up to a predetermined depth position can be allowed. In addition, since it is the same as the structure shown in Example 1 about another structure, the same code | symbol is attached | subjected about what is the same structure, and description is abbreviate | omitted.

  Subsequently, the configuration of the seat 1 of Example 3 (vehicle seat: see FIG. 1 for the configuration of the seat 1) will be described with reference to FIG. In this embodiment, when the airbag unit 10 has a frontal collision of the vehicle, the airbag module 11 provided therein receives an electrical signal from the ECU of the vehicle and ignites explosives with an inflator. It is the structure which expand | deploys so that it may inflate toward the passenger | crew who seats on the back side seat of the seat 1. FIG. In the airbag unit 10 described above, the module case 12 that encloses the airbag module 11 is installed at a position closer to the upper side of the center in the width direction in the back surface portion (outer peripheral portion) of the seat back 2. A part of the backboard 2B that covers the back portion of the seat back 2 (protrusion 2Bb) is in the recess 12N1 of the fitting protrusion 12N formed on the lower wall 12M of the module case 12. By being inserted from the back side of the sheet, the position is fixed in the recess 12N1 in the sheet width direction. Here, the fitting protrusion 12N corresponds to the “fitting portion” of the present invention.

  Specifically, in the airbag unit 10 described above, the wall portion 12J on the front side of the module case 12 is applied from the rear side to the bracket 2Fd that is bridged between the two side frames 2F of the seat back 2, and is bolted (module The stud bolt 12J1 protruding from the front wall portion 12J of the case 12 is passed through the bracket 2Fd and fastened by a nut 12J2) and fixed. In the airbag unit 10 described above, the rear wall portion 12K of the module case 12 containing the airbag module 11 is pressed to the rear side when the airbag is inflated and deployed. The break portion 12K1 between the upper wall portion 12L and the upper wall portion 12L is broken using the joint portion as a fulcrum to be pushed open to the rear side.

  In the backboard 2B, the upper edge 2Be applied to the installation area of the module case 12 in the center in the width direction is formed on the lower wall 12M of the module case 12 by the insertion structure of the protrusion 2Bb described above. The protrusion 12N is inserted into the recess 12N1 and is fixed in the sheet width direction. Here, the rear wall portion 12K of the module case 12 described above corresponds to the “specific wall portion” of the present invention, and the lower wall portion 12M of the present invention “the wall portion different from the specific wall portion” of the present invention. It corresponds to. The recess 12N1 is formed in a shape that allows the upper edge 2Be of the backboard 2B to be loosely fitted, and by fitting the edge 2Be into the interior thereof, the edge 2Be is moved in the seat width direction. The position can be held so as not to be loose. Further, the depth of the recess 12N1 is deeper than the depth into which the upper edge 2Be of the backboard 2B is fitted, and has a predetermined depth without hindering the fitting of the edge 2Be of the backboard 2B. The fitting to the position can be permitted. In addition, since it is the same as the structure shown in Example 1 about another structure, the same code | symbol is attached | subjected about what is the same structure, and description is abbreviate | omitted.

  As mentioned above, although embodiment of this invention was described using the three Examples, this invention can be implemented with various forms other than the said Example. For example, the “vehicle seat” of the present invention may be a seat applied to a vehicle other than an automobile such as a railway vehicle, in addition to a seat constituting a passenger seat of an automobile, and may also be an aircraft, a ship, etc. The present invention can be widely applied to seats used for various vehicles.

  Further, the module case and the backboard may be made of metal. In addition, the fitting part that allows the position of the part of the backboard formed in the module case to be fixed in the seat width direction is formed on a wall part that is different from the specific wall part that is pushed open when the airbag is inflated and deployed. What is necessary is just to be formed, and you may form in wall parts other than the wall part shown in each Example mentioned above. The fitting portion is configured to receive a part of the backboard from the back side of the seat, and to receive a part of the backboard in the height direction to restrict movement in the seat width direction. It may be. In addition, the fitting portion receives a part of the backboard in the seat width direction and is in contact with the backboard, and fixes another part of the backboard to a part such as a frame of the seatback by a fixing means such as a clip. Accordingly, a configuration may be adopted in which a portion of the backboard in a state of being in contact in the seat width direction is fixed and held in the seat width direction by the rigidity of the backboard.

  Further, the fitting part may be any part that is configured to be fitted in a state in which a part of the backboard is fixed in the position in the seat width direction by insertion. In relation, it may be formed of a shape other than the recess. Further, the fitting portion may not completely restrain movement of a part of the fitted backboard in the seat width direction, and the movement of the part of the fitted backboard in the sheet width direction is fixed. It may function as what suppresses within the range.

  In addition, as shown in each of the above-described embodiments, the airbag unit is installed in a shape that fits in the outer shape of the seat back, as well as protruding outside the outer shape of the seat back, in the outer periphery of the seat back. It may be provided. Further, the airbag unit only needs to be provided on the outer periphery of the seatback, and is provided on the side of the seatback on the vehicle inner side so that the airbag is inflated toward the side of the seated occupant. The airbag may be provided so as to be inflated toward an occupant sitting on the rear side seat, provided at a location near the lower side of the back portion of the seat back, or the like.

1 seat (vehicle seat)
2 Seat back 2F Side frame 2Fa Outer surface 2Fb Front surface 2Ff Rear surface 2Ff Shaped wire 2Fd Bracket 2P Back pad 2Ps Side support 2Pa Through hole 2C Back cover 2Ca Fastening hook 2Cb Cutout 2B Backboard 2Ba Edge Part 2Bb Protrusion part 3 Seat cushion 4 Headrest part 10 Airbag unit 11 Airbag module 12 Module case 12A Outer wall part (specific wall part)
12A1 Breaking portion 12B Inner wall portion 12C Rear wall portion (a wall portion different from a specific wall portion)
12D Recess 12D1 Outside slope 12D2 Inside slope 12E Projection piece 12F Stud bolt 12G Nut 12H Fitting 12H1 Recess 12J Front wall 12J1 Stud bolt 12J2 Nut 12K Rear wall (specific wall)
12K1 Breaking portion 12L Upper wall portion 12M Lower wall portion (a wall portion different from a specific wall portion)
12N Fitting protrusion (fitting part)
12N1 recess

Claims (3)

An air bag unit is attached to the outer periphery of the seat back, and a vehicle seat in which a back board is attached to the back of the seat back,
The airbag unit has a configuration in which a specific wall portion of a module case containing the airbag module is pushed open when the airbag is inflated and deployed.
Part of the backboard is fitted into a fitting portion formed on a wall portion different from the specific wall portion of the module case, so that movement in the seat width direction with respect to the module case is restricted. A vehicle seat, characterized in that it is provided in the state of being made. The vehicle seat according to claim 1,
The airbag unit is provided at a side portion of the seat back, and a wall portion outside the seat of the module case is pushed open to the outside of the seat so that the airbag is inflated and deployed toward the front side of the seat. ,
The vehicle seat, wherein the fitting portion is provided on a rear side portion of the module case. The vehicle seat according to claim 2,
The vehicle seat according to claim 1, wherein the fitting portion is a recess formed in a rear side portion of the module case, and an edge portion of the backboard is fitted into the recess.

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