JP2015024771A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a module case of an airbag unit to a seat frame at favorable workability.SOLUTION: In a seat, an airbag unit 10 is attached to a side frame 2F of a seat back 2. In the airbag unit 10, a module case 12 involving the airbag module 11 is attached to a face part 2Fa of the side frame 2F. The module case 12 has, at the face part 2Fa at the outside of the side frame 2F, an engagement part (front-side hook piece 12A and a rear-side hook piece 12F1 of another bracket 12F) which can be engaged in a come-off stoppable state by being assembled from the outside, and attached to the face part 2Fa at the outside of the side fame 2F by the engagement part.

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 a seat frame.

  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.

JP 2000-95052 A

  However, in the above prior art, when attaching the module case to the outer side portion of the side frame, the nut must be fastened by the inner side portion of the side frame, resulting in poor workability. The present invention has been created as a solution to the above problem, and the problem to be solved by the present invention is to allow the module case of the airbag unit to be assembled to the seat frame with good workability. .

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 a seat frame. The airbag unit has a configuration in which a module case containing the airbag module is attached to a surface portion of the seat frame on the seat outer peripheral side. The module case has an engagement portion that can be engaged with a surface portion of the seat frame on the outer periphery side of the seat frame so that the seat frame can be prevented from being detached by being assembled from the outer periphery side of the seat frame. It is attached to the face part.

  Here, the “seat outer peripheral side” in the seat frame refers to the outer peripheral side of the seat shape. That is, taking the side frame on the vehicle outer side of the seat back as an example, when each of the front and rear side edges of the side frame is bent to the inside of the seat, a surface portion facing the outside of the side frame; The surface portion facing the front side and the surface portion facing the rear side are respectively surface portions corresponding to “surface portions on the outer periphery side of the seat”, and the side facing these surface portions is the “sheet outer periphery side”.

  According to the first aspect, the module case can be assembled and attached to the seat frame from the outer periphery side of the seat by the engaging portion. Therefore, when attaching the module case to the seat frame, the work of turning the hand toward the seat inner periphery side of the seat frame is eliminated, so that the attaching operation can be performed with good workability.

  The second invention is the following configuration in the first invention described above. The module case is configured to be attached to the outer surface portion of the side frame outside the seat back of the vehicle. The engaging portion is configured to engage with the side frame in a state in which the side frame can be prevented from coming off in a manner of sandwiching the side frame from the front and rear sides.

  According to this second invention, the module case can be more firmly attached to the side frame outside the seat back of the vehicle.

  The third invention is the following configuration in the first or second invention described above. The engaging portion is configured as a hook that is engaged with a state in which the engaging portion is hooked to both edges of the cross section of the seat frame and is prevented from coming off.

  According to the third aspect, the module case can be easily attached to the seat frame.

  The fourth invention is the following structure in the third invention described above. The engaging portion is formed integrally with the module case and hooked to an edge portion on one side of the cross section of the seat frame, and the engaging portion is formed separately from the module case and has an edge on the other side. And a second hook piece hooked on the portion. The second hook piece is configured to be integrally coupled to the module case after the first hook piece and the second hook piece are hooked on the edge of each side of the seat frame.

  According to the fourth aspect of the invention, the module case can be easily and firmly attached to the seat frame integrally.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is a disassembled perspective view of a module case. It is the III-III sectional view taken on the line of FIG. It is sectional drawing showing the state of the seat back before a module case is attached. It is sectional drawing showing the state which hooked the hook piece of the front side of a module case on the side frame of the seat back. It is sectional drawing showing the state which hooked the rear hook piece of the module case on the side frame of the seat back. 6 is a perspective view illustrating a configuration of a module case of a vehicle seat according to Embodiment 2. FIG. It is sectional drawing showing the state before a module case was attached to the side frame of a seat back. It is sectional drawing showing the state in which the module case was attached to the side frame of the seat back. 6 is a perspective view illustrating a configuration of a module case of a vehicle seat of Example 3. FIG. It is sectional drawing showing the state before a module case was attached to the side frame of a seat back. It is sectional drawing showing the state in which the module case was attached to the side frame of the seat back.

  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 above-described airbag unit 10 is provided by being attached to the outer surface portion 2Fa of the side frame 2F that forms the skeleton of the side portion of the seatback 2 outside the vehicle. 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 12 can be attached to the side frame 2F as shown in FIGS. 2 to 6 as a pair of upper and lower front hook pieces 12A formed integrally with the module case 12, and to the module case 12. A pair of upper and lower rear hook pieces 12F1 formed in a separate bracket 12F, which are separately formed, are respectively joined to a front edge 2Fd and a rear edge 2Fe which are bent inside the seat of the side frame 2F. After that, the separate bracket 12F is integrally fastened to the module case 12 with bolts 12G. Here, the pair of upper and lower front hook pieces 12A formed on the module case 12 correspond to the “first hook piece” of the present invention, and the pair of upper and lower rear hook parts formed on the separate bracket 12F. Each of the hook pieces 12F1 corresponds to a “second hook piece” of the present invention.

  Hereinafter, the mounting structure of the module case 12 to the side frame 2F 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. 3, 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 The above-described airbag unit 10 is attached to a side frame 2 </ b> F that forms a skeleton on the side of the back 2 outside the vehicle. The side frame 2F described above is formed of a single vertically long steel plate material, and the front edge portion 2Fd and the rear edge portion 2Fe are each bent in two stages on the inner side of the sheet. The edge is formed so as to be folded toward the inside of the sheet shape so that the edge does not 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. The front surface portion 2Fb has a sheet shape so that the bent front edge portion (front edge portion 2Fd) is directed to the rear side inside the sheet so that the edge does not stand toward the outside of the sheet shape. It is formed in the shape folded toward the inside.

  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. Further, the rear surface portion 2Fc has a bent front edge portion (rear side edge portion 2Fe) directed toward the front inside the seat so that the edge does not stand toward the outside of the seat shape. It is formed in a shape folded toward the inside of the sheet 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 formed in a shape that protrudes to the rear side of the seat up to a position that covers the back portion of each side frame through the outer sides of each side frame (only the side frame 2F outside the vehicle is shown). Has been. However, the side support portion 2Ps outside the vehicle on the side where the airbag unit 10 is mounted is partially wide so that a part of the portion that covers the side frame 2F from the outside opens the mounting area of the airbag unit 10. It is formed in a shape that is thinned into a shape penetrating in the direction (thickening portion 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 edge portions of the back cover 2C are connected to the hooks 2Ca attached to the respective edge portions by the rear edge portions of the side frames (the rear edge portion 2Fe of the side frame 2F outside the vehicle). By being hooked on (only shown), it is in a state of being 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 cutout portion 2Pa formed on the pad 2P, a cutout portion 2Cb cut out to partially penetrate in the width direction is formed so as to open the mounting area of the airbag unit 10.

  As shown in FIG. 3, the backboard 2 </ b> B is attached to various portions of a back frame (only a part of the side frames 2 </ b> F) (not shown) after an air bag unit 10 to be described later is attached to the side frame 2 </ b> F outside the vehicle. The clip is inserted from the rear side and attached. The backboard 2B described above is formed in a shape in which the left and right edges are curved forward of the seat, and covers the rear region of each side frame (only the side frame 2F outside the vehicle is shown) from both outsides. It is in the state provided in. Specifically, the backboard 2B has a module case 12 of the airbag unit 10 that is attached to the side frame 2F on the same side as the bulge extending to the front side of the edge portion of the region to which the airbag unit 10 outside the vehicle is attached. It is formed so as to project forward to a position where it hits the rear surface, and is provided in a state in which a fastening portion by a bolt 12G between a module case 12 and a separate bracket 12F described later is covered from the outside.

  Next, a structure for attaching the module case 12 of the airbag unit 10 to the side frame 2F will be described. The module case 12 described above is formed in a vertically long box shape that accommodates the airbag module 11 therein, and a pair of upper and lower front hook pieces 12A formed at the front edge inside the seat, and the module A pair of upper and lower rear hook pieces 12F1 formed on a separate bracket 12F configured separately to be attachable to the case 12, and a front edge 2Fd and a rear edge of the side frame 2F described above, respectively. After being hooked onto 2Fe, the separate bracket 12F is integrally fastened to the module case 12 with bolts 12G, thereby being integrally attached to the side frame 2F.

  Specifically, as shown in FIG. 2, the module case 12 described above has an inner wall opposite to the outer wall portion 12 </ b> C that is broken and opened when the airbag module 11 in the interior thereof is inflated and deployed. Two hook pieces 12A on the front side described above are disposed in the front edge portion of the portion 12D so as to be spaced apart in the height direction in the upper region and the lower region of the module case 12. A mounting portion 12B for mounting the above-described separate bracket 12F is spaced apart from the upper region and the lower region of the module case 12 in the height direction at the rear edge portion of the inner wall portion 12D of the module case 12. These two positions are formed in a shape protruding in a square plate shape on the rear side.

  As shown in FIGS. 4 to 5, the pair of upper and lower front hook pieces 12 </ b> A described above are hooked from the vehicle outer side to the front edge 2 </ b> Fd of the vehicle outer side frame 2 </ b> F, thereby the side frame 2 </ b> F. It is formed in a shape that engages in a state where it is prevented from coming off. In the module case 12 described above, the pair of upper and lower front hook pieces 12A are hooked on the front edge 2Fd of the side frame 2F outside the vehicle, and then the inner wall 12D is used as a side with the hook as a fulcrum. By rotating so as to press against the outer surface portion 2Fa of the frame 2F, the inner peripheral surfaces of the front hook pieces 12A and the inner wall portion 12D respectively become the front surface portion 2Fb and the outer surface portion 2Fa of the side frame 2F. It is formed in a shape that is set in a state where the surface is in wide contact with each other.

  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.

  As shown in FIG. 2, the separate bracket 12F is formed by integral molding of resin, and is fitted to each mounting portion 12B of the module case 12 described above and is integrally fastened by bolts 12G. The mounting portion 12F2 and a pair of upper and lower rear hook pieces 12F1 that can be hooked from the vehicle outer side to the rear edge 2Fe of the vehicle outer side frame 2F described above are formed. As shown in FIG. 6, the pair of upper and lower rear hook pieces 12F1 described above are hooked from the vehicle outer side to the rear edge 2Fe of the vehicle outer side frame 2F, thereby being attached to the side frame 2F. On the other hand, it is formed so as to engage with the state where it is prevented from coming off.

  The separate bracket 12F described above is attached to the side frame 2F and the module case 12 outside the vehicle as follows. First, in the state where each front hook piece 12A of the module case 12 is hooked on the front edge 2Fd of the side frame 2F, each rear hook piece 12F1 of the separate bracket 12F is moved to the rear of the side frame 2F. Hook the side edge 2Fe from the outside. Next, each attachment portion 12F2 of the separate bracket 12F is placed in the attachment portion 12B of the module case 12 from the outside, and the bolt 12G is inserted from the outside to attach each attachment portion 12B and each attachment portion. 12F2 are fastened together. As a result, the separate bracket 12F is applied in a state where the above-described pair of upper and lower rear hook pieces 12F1 are in wide contact with the rear surface portion 2Fc of the side frame 2F, and each attached portion 12F2 is a module. The module 12 is integrally coupled to the module case 12 in a state where the outer surface of each mounting portion 12B of the case 12 is in wide contact with the outer surface. Before hooking each front hook piece 12A of the module case 12 to the front edge 2Fd of the side frame 2F, the rear hook piece 12F1 of the separate bracket 12F is attached to the rear edge of the side frame 2F. You may make it hook on 2Fe. Even in this case, each mounting portion 12F2 of the separate bracket 12F and each mounting portion 12B of the module case 12 are overlapped in the plate thickness direction, and the bolt 12G is inserted from the outside to attach each mounting portion 12B. And each attached portion 12F2 can be fastened together.

  As a result of the fastening, the module case 12 and the separate bracket 12F are integrally coupled to each other, and these are hooked to the front edge 2Fd and the rear edge 2Fe of the side frame 2F, respectively. The side frame 2F is sandwiched from the front and rear sides, and is attached to the side frame 2F in an integrally coupled state. The bolts 12G are provided at positions where their heads do not protrude from the module case 12 to the outside of the seat because the mounting portions 12B of the module case 12 are formed at the rear edge of the inner wall portion 12D. It is supposed to be.

  The above-described positioning structure in the height direction of the module case 12 with respect to the side frame 2F is not particularly illustrated, but various configurations can be applied. For example, a protruding portion that protrudes so as to sandwich the module case 12 in the height direction is provided in the upper and lower regions of the portion of the side frame 2F to which the module case 12 is attached, or a protruding portion is provided on the inner wall portion 12D of the module case 12. And a structure that is inserted into a hole formed in the side frame 2F.

  When the airbag is inflated and deployed from the airbag module 11, the outer wall portion 12C is separated from the rear wall portion by the deployment pressure as shown in the phantom line state of FIG. The break portion 12C1 at the joint with the front wall portion is broken using the joint portion as a fulcrum and pushed outward. At this time, the wall portion 12C on the outside of the module case 12 has no other parts such as the backboard 2B and the bolt 12G arranged in the development path that is pushed open to the outside thereof, so that the movement is not hindered, The airbag can be pushed wide open to a position that does not obstruct the deployment path of the airbag.

  In addition, the separate bracket 12F is configured to be attached to each mounting portion 12B formed to protrude to the rear side of the module case 12, so that the module case is formed in a space that is widely open from the back pad 2P. Since the bolt 12G can be fastened with the bolt 12, the attachment can be performed with good workability.

  Thus, the seat 1 of the present embodiment has a configuration in which the airbag unit 10 is attached to the seat frame (side frame 2F). The airbag unit 10 is configured such that a module case 12 containing the airbag module 11 is attached to a surface portion (outer surface portion 2Fa) of the seat frame (side frame 2F) on the outer peripheral side of the seat. The module case 12 can be engaged with the seat frame (side frame 2F) in a state in which it can be prevented from being detached by assembling from the seat outer peripheral side (seat outer side) to the seat outer peripheral side surface (outer surface 2Fa). Portion (front hook piece 12A and rear hook piece 12F1), and a seat frame (side frame 2F) seat outer peripheral surface portion by an engaging portion (front hook piece 12A and rear hook piece 12F1) It is attached to (outer surface part 2Fa). With such a configuration, the module case 12 is moved from the seat outer peripheral side (the seat outer side) to the seat frame (side frame 2F) by the engaging portions (the front hook piece 12A and the rear hook piece 12F1). Can be assembled and attached. Therefore, when attaching the module case 12 to the seat frame (side frame 2F), the work of turning the hand to the seat inner peripheral side of the seat frame (side frame 2F) is eliminated, so that the attaching operation can be performed with good workability. .

  Specifically, the module case 12 is configured to be attached to the outer surface portion 2Fa of the side frame 2F outside the vehicle of the seat back 2. The engaging portions (the front side hook piece 12A and the rear side hook piece 12F1) are configured to engage with the side frame 2F in a state in which the side frame 2F can be prevented from coming off in a manner of sandwiching the side frame 2F from the front and rear sides. With this configuration, the module case 12 can be more firmly attached to the side frame 2F outside the vehicle of the seat back 2.

  Further, the engaging portions (the front hook piece 12A and the rear hook piece 12F1) are formed on both edges (front edge 2Fd and rear edge 2Fe) of the cross section of the seat frame (side frame 2F). It is configured as a hook that engages in a state where it is hooked and retained. With this configuration, the module case 12 can be easily attached to the seat frame (side frame 2F).

  Further, the engaging portions (the front hook piece 12A and the rear hook piece 12F1) are formed integrally with the module case 12, and are arranged on one side edge (front side cross section of the seat frame (side frame 2F)). The first hook piece (front hook piece 12A) hooked on the edge portion 2Fd) and the module case 12 are formed separately and hooked on the other edge portion (rear edge portion 2Fe). A second hook piece (rear hook piece 12F1). The second hook piece (rear hook piece 12F1) has a first hook piece (front hook piece 12A) and a second hook piece (rear hook piece 12F1) seat frame (side frame 2F). After being hooked on the edge of each side, the module case 12 is integrally coupled. With such a configuration, the module case 12 can be attached to the seat frame (side frame 2F) simply and firmly in an integrated manner.

  Subsequently, the configuration of the seat 1 of Example 2 (vehicle seat: refer to FIG. 1 for the configuration of the seat 1) will be described with reference to FIGS. In this embodiment, as shown in FIG. 7, the front edge 2Fd and the rear edge of the side frame 2F outside the vehicle are respectively provided on the front edge and the rear edge inside the seat of the module case 12. A pair of upper and lower front hook pieces 12 </ b> A and a rear hook piece 12 </ b> H that are elastically hooked on the edge 2 </ b> Fe from the outside are formed. Here, the pair of upper and lower front hook pieces 12A corresponds to the “first hook piece” of the present invention, and the pair of upper and lower rear hook pieces 12H corresponds to the “second hook piece” of the present invention. To do.

  The pair of upper and lower front hook pieces 12A and rear hook pieces 12H described above are applied to press the module case 12 from the outside toward the side frame 2F outside the vehicle, as shown in FIGS. As a result, it is pushed toward the inside of the side frame 2F while being bent so as to be pushed back and forth by the front surface portion 2Fb and the rear surface portion 2Fc of the side frame 2F, and then the front side of the side frame 2F. Deformation is restored when the edge 2Fd or the rear edge 2Fe is exceeded, and the state is put on the front edge 2Fd or the rear edge 2Fe.

  Here, rubber 12J (elastic body) is affixed to the inner wall portion 12D of the module case 12 described above at two positions above and below. As shown in FIG. 9, each rubber 12J pulls the front hook piece 12A and the rear hook piece 12H to the front edge 2Fd and the rear edge 2Fe of the side frame 2F, respectively. It is provided as an elastic member for absorbing a gap generated between the inner wall portion 12D of the module case 12 and the outer surface portion 2Fa of the side frame 2F after being hung. Each rubber 12J pushes the front hook piece 12A and the rear hook piece 12H of the module case 12 to a position beyond the front edge 2Fd and the rear edge 2Fe of the side frame 2F. Each of the front hook piece 12A and the rear hook piece 12H is deformed by being pushed between the inner wall portion 12D and the outer surface portion 2Fa of the side frame 2F. By unloading the pushing force applied to the module case 12 after being put on the side edge 2Fe, the front hook piece 12A and the rear hook piece 12H are attached to the side frame 2F by the elastic force. The front edge 2Fd and the rear edge 2Fe are hooked and held. Due to the elastic force exerted by each rubber 12J, the module case 12 is held in a state of being integrally coupled to the side frame 2F without rattling in the seat width direction. In addition, when the rubber 12J which applies the elastic force in the pushing-back direction to the module case 12 is not set, each of the hook pieces 12A and 12H is tapered to have a tapered shape. The hook pieces 12A and 12H may be easily bent so as to be easily hooked to the front edge 2Fd or the rear edge 2Fe of the side frame 2F.

  Thus, according to the configuration of the present embodiment, the module case 12 can be easily attached to the side frame 2F on the vehicle outer side by a one-touch operation of pushing from the vehicle outer side. 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.

  Thus, the seat 1 of the present embodiment has a configuration in which the airbag unit 10 is attached to the seat frame (side frame 2F). The airbag unit 10 is configured such that a module case 12 containing the airbag module 11 is attached to a surface portion (outer surface portion 2Fa) of the seat frame (side frame 2F) on the outer peripheral side of the seat. The module case 12 can be engaged with the seat frame (side frame 2F) in a state in which it can be prevented from being detached by assembling from the seat outer peripheral side (seat outer side) to the seat outer peripheral side surface (outer surface 2Fa). Portion (front hook piece 12A and rear hook piece 12H), and the surface portion of the seat frame (side frame 2F) on the outer peripheral side of the seat frame by the engaging portion (front hook piece 12A and rear hook piece 12H) It is attached to (outer surface part 2Fa). With this configuration, the module case 12 is moved from the seat outer peripheral side (seat outer side) to the seat frame (side frame 2F) by the engaging portions (the front hook piece 12A and the rear hook piece 12H). Can be assembled and attached. Therefore, when attaching the module case 12 to the seat frame (side frame 2F), the work of turning the hand to the seat inner peripheral side of the seat frame (side frame 2F) is eliminated, so that the attaching operation can be performed with good workability. .

  Specifically, the module case 12 is configured to be attached to the outer surface portion 2Fa of the side frame 2F outside the vehicle of the seat back 2. The engaging portions (the front side hook piece 12A and the rear side hook piece 12H) are configured to engage with the side frame 2F in a state in which the side frame 2F can be prevented from coming off in a manner of sandwiching the side frame 2F from the front and rear sides. With this configuration, the module case 12 can be more firmly attached to the side frame 2F outside the vehicle of the seat back 2.

  Further, the engaging portions (the front hook piece 12A and the rear hook piece 12H) are formed on both edges (front edge 2Fd and rear edge 2Fe) of the cross section of the seat frame (side frame 2F). It is configured as a hook that engages in a state where it is hooked and retained. With this configuration, the module case 12 can be easily attached to the seat frame (side frame 2F).

  Subsequently, the configuration of the seat 1 of Example 3 (vehicle seat: refer to FIG. 1 for the configuration of the seat 1) will be described with reference to FIGS. In this embodiment, as shown in FIG. 10, the front surface portion 2Fb and the rear surface portion of the side frame 2F outside the vehicle are respectively provided on the front edge portion and the rear edge portion inside the seat of the module case 12. A pair of upper and lower front claw pieces 12K and a rear claw piece 12L that are elastically hooked to the 2Fc from the outside are formed. Here, the pair of upper and lower front claw pieces 12 </ b> K and the rear claw piece 12 </ b> L each correspond to an “engagement portion” of the present invention. In this embodiment, as shown in FIGS. 11 to 12, the front surface portion 2Fb of the side frame 2F is bent at a substantially right angle from the front edge of the above-described outer surface portion 2Fa to the inside of the seat, and further bent. The tip end portion thus formed is bent to an oblique angle facing the back side of the sheet, and is formed into a mountain-folded shape in two stages.

  The pair of upper and lower front claw pieces 12K and rear claw pieces 12L described above are arranged so as to press the module case 12 from the outside toward the side frame 2F outside the vehicle, as shown in FIGS. As a result, the engaging claws 12K1 and 12L1 formed at the front end portions and projecting inwardly from each other are pushed back and forth by the front surface portion 2Fb and the rear surface portion 2Fc of the side frame 2F. Until the position that matches the respective engagement holes 2Fb1 and 2Fc formed in the front surface portion 2Fb and the rear surface portion 2Fc of the side frame 2F. By being pushed in, these pushed and deformed deformations are returned, and the respective engagement claws 12K1, 12L1 are moved to the respective engagement holes 2Fb1, 2Fc1. It becomes a state of being hooked in. As a result, the module case 12 does not rattle in the seat width direction, the height direction, or the front-rear direction with respect to the side frame 2F, and is integrally coupled.

  Thus, according to the configuration of the present embodiment, the module case 12 can be easily attached to the side frame 2F on the vehicle outer side by a one-touch operation of pushing from the vehicle outer side. 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.

  Thus, the seat 1 of the present embodiment has a configuration in which the airbag unit 10 is attached to the seat frame (side frame 2F). The airbag unit 10 is configured such that a module case 12 containing the airbag module 11 is attached to a surface portion (outer surface portion 2Fa) of the seat frame (side frame 2F) on the outer peripheral side of the seat. The module case 12 can be engaged with the seat frame (side frame 2F) in a state in which it can be prevented from being detached by assembling from the seat outer peripheral side (seat outer side) to the seat outer peripheral side surface (outer surface 2Fa). Part (front claw piece 12K and rear claw piece 12L), and a seat frame (side frame 2F) on the outer peripheral side of the seat frame by the engaging part (front claw piece 12K and rear claw piece 12L) It is attached to (outer surface part 2Fa). With such a configuration, the module case 12 is placed on the seat frame (side frame 2F) from the seat outer peripheral side (seat outer side) by the engaging portions (front claw pieces 12K and rear claw pieces 12L). Can be assembled and attached. Therefore, when attaching the module case 12 to the seat frame (side frame 2F), the work of turning the hand to the seat inner peripheral side of the seat frame (side frame 2F) is eliminated, so that the attaching operation can be performed with good workability. .

  Specifically, the module case 12 is configured to be attached to the outer surface portion 2Fa of the side frame 2F outside the vehicle of the seat back 2. The engaging portions (the front claw piece 12K and the rear claw piece 12L) are engaged with each side of the side frame 2F by the engagement claw 12K1 and 12L1 so that the side frame 2F is sandwiched from the front and rear sides. It is configured. With this configuration, the module case 12 can be more firmly attached to the side frame 2F outside the vehicle of the seat back 2.

  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. Moreover, the structure of this invention is applicable also to a seat cushion and a headrest other than the seat back of a vehicle seat.

  The module case may be made of metal. Further, the module case only has to be configured to be assembled from the seat outer peripheral side to the seat outer peripheral side (seat-shaped outer peripheral side) surface portion of the seat frame. For example, in the side frame on the vehicle outer side of the seat back, the side frame When the front and rear side edges of each side frame are bent inward (the shape shown in the first to third embodiments), the outer side surface portion of the same side frame (the outer side) Surface part 2Fa: refer to Examples 1 to 3), surface part facing the front side (front surface part 2Fb: refer to Examples 1 to 3), surface part facing the rear side (rear surface part 2Fc: refer to Examples 1 to 3) ) May be assembled from the outer periphery side (outer side, front side, and rear side) of the seat. Further, the seat outer peripheral side surface portion of the seat frame to which the module case is attached does not necessarily have to be formed in a planar shape so as to make a wide surface contact with the module case. For example, the seat portion is warped with respect to the module case. It may be a rounded shape.

1 seat (vehicle seat)
2 seat back 2F side frame 2Fa outer surface 2Fb front surface 2Fb1 engagement hole 2Fc rear surface 2F1 engagement hole 2Fd front edge 2Fe rear edge 2Ff shaping wire 2P back pad 2Ps side support 2Pa meat Pull-out part 2C Back cover 2Ca Fastening hook 2Cb Cut-out part 2B Backboard 3 Seat cushion 4 Headrest part 10 Air bag unit 11 Air bag module 12 Module case 12A Front hook piece (first hook piece)
12B Mounting portion 12C Outer wall portion 12C1 Breaking portion 12D Inner wall portion 12E Projection piece 12F Separate bracket 12F1 Rear hook piece (second hook piece)
12F2 Mounted part 12G Bolt 12H Rear hook piece (second hook piece)
12J rubber 12K front claw piece (engagement part)
12K1 engagement claw 12L rear claw piece (engagement part)
12L1 engaging claw

Claims (4)

A vehicle seat having an airbag unit attached to a seat frame,
The airbag unit is configured such that a module case containing the airbag module is attached to a surface portion on the seat outer periphery side of the seat frame,
The module case has an engaging portion that can be engaged with a surface portion of the seat frame on the outer periphery side of the seat frame so that the seat frame can be prevented from being detached by assembling from the outer periphery side of the seat frame. A vehicle seat characterized by being attached to a surface portion on the outer periphery side of the seat. The vehicle seat according to claim 1,
The module case is configured to be attached to an outer surface portion of a side frame on the vehicle outer side of a seat back, and the engaging portion is in a state that can be prevented from being detached from the side frame in a manner of sandwiching the side frame from the front and rear sides. A vehicle seat characterized by being configured to engage. The vehicle seat according to claim 1 or 2,
The vehicle seat according to claim 1, wherein the engagement portion is configured as a hook that is engaged with a state in which the engagement portion is hooked to both edges of a cross section of the seat frame and is prevented from being detached. The vehicle seat according to claim 3,
The engaging portion is formed separately from the module case, and a first hook piece that is integrally formed with the module case and hooked to an edge on one side of a cross section of the seat frame. A second hook piece that is hooked to an edge on the other side, wherein the second hook piece is connected to each side of the seat frame by the first hook piece and the second hook piece. A vehicle seat characterized by being configured to be integrally coupled to the module case after being hooked on an edge.

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