Skin fixation device and skin fixation method

Abstract

Provided is a skin fixation device that allows a skin to be easily attached to a member for fixation, and enhances the engagement force between the skin and the member for fixation.　A skin fixation device (K) includes: an insertion member (20) that is connected to a rear-side skin (T2); and a holding member (10) that is connected to a front-side skin (T1) and into which the insertion member (20) is inserted. An insertion portion (22) has an extension portion (24) that extends in the insertion direction in which the insertion portion (22) is inserted into a holding portion (12). The holding portion (12) includes: a protruding portion (16) that protrudes in an intersecting direction intersecting the insertion direction and restricts the rotation of the insertion portion (22); and an insertion port (19) through which the insertion portion (22) is inserted into the holding portion (12). A fore end portion (24a) in the insertion direction of the extension portion (24) extends linearly, and abuts on the protruding portion (16) from the intersecting direction. The width (H1) of the fore end portion (24a) is smaller than the width (H2) in the intersecting direction of the insertion port (19).

Description

Epidermis fixing device and epidermis fixing method

[0001] The present invention relates to an epidermis fixing device and an epidermis fixing method, and more particularly to an epidermis fixing device having a first fixing member connected to a first epidermis and a second fixing member connected to a second epidermis and into which the first fixing member is inserted, and to an epidermis fixing method in which the first fixing member connected to the epidermis is inserted into a second fixing member provided on a fixed member to fix the epidermis to the fixed member.

[0002] Conventionally, there has been known a skin fixing device that fixes a skin to a padding material (a fixed member) by inserting a first fixing member to which a first skin is connected into a second fixing member to which a second skin is connected. For example, the skin fixing device described in Patent Document 1 has a rotation restricting part that restricts rotation of the insertion part relative to the holding part. The rotation restricting part fits a locking end of the holding part into a recess of the insertion part, thereby preventing the insertion part from falling off the holding part when a force is applied in a direction to pull out the insertion part.

[0003] Japanese Patent Application Laid-Open No. 2020-124442

[0004] In the epidermis fixing device described in Patent Document 1, when inserting the insertion part into the holding part, it was necessary to pull the insertion part while inserting it into the holding part to apply tension to the epidermis. This made the insertion process complicated and stressful, which could make it difficult to perform efficiently. Furthermore, when a large load was applied to the first epidermis, and a force was applied in the direction of pulling the insertion part out, the locking end of the holding part could widen, causing the insertion part to come off the holding part.

[0005] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a skin fixing device and a skin fixing method that can easily attach a skin to a fixed member and increase the engagement force between the skin and the fixed member.

[0006] The above problem is solved by the epidermis fixing device of the present invention, which includes a first fixing member connected to a first epidermis and a second fixing member connected to a second epidermis and into which the first fixing member is inserted, wherein the first fixing member has a first base to which the first epidermis is connected and an insertion portion connected to the first base and inserted into the second fixing member, the second fixing member has a second base to which the second epidermis is connected and a holding portion connected to the second base and into which the insertion portion is inserted, the insertion portion has an extending portion that extends in an insertion direction in which the insertion portion is inserted into the holding portion, the holding portion has a protrusion that protrudes in a transverse direction that intersects the insertion direction and restricts rotation of the insertion portion, and an insertion opening through which the insertion portion is inserted into the holding portion, a tip end of the extending portion in the insertion direction extends linearly and abuts on the protrusion from the transverse direction, and a width of the tip end is smaller than a width of the insertion opening in the transverse direction. With the above configuration, the linearly extending tip end partially abuts the protrusion, making it easier to insert the insertion part into the holding part while restricting rotation of the insertion part. Furthermore, since the width of the tip end is smaller than the width of the insertion opening, the insertion part can be easily inserted into the holding part. Furthermore, the protrusion improves the rigidity of the holding part, preventing plastic deformation of the holding part. Therefore, even if a force acts in the direction of pulling out the insertion part, it is possible to prevent the insertion part from coming off the holding part, and the engagement force between the cover and the fixed member can be increased. Therefore, the cover can be easily attached to the fixed member, and the engagement force between the cover and the fixed member can be increased.

[0007] In this case, the retaining portion may include a first retaining portion extending from the second base portion along the insertion direction and holding the insertion portion from one side in the transverse direction; a second retaining portion extending bent from the first retaining portion and holding the insertion portion from the other side in the transverse direction; a connecting portion connecting the first retaining portion and the second retaining portion and positioned opposite the leading end of the insertion portion in the insertion direction when the insertion portion is held by the retaining portion; and a locking portion provided at an end of the second retaining portion in the insertion direction and locking with the locked portion of the insertion portion in the holding state. The protrusion is provided on the first retaining portion and protrudes from the first retaining portion toward the second retaining portion, and the insertion opening is provided between the locking portion and the first retaining portion in the transverse direction. With this configuration, the protrusion is provided on the first retaining portion, thereby improving the strength of the first retaining portion, which is prone to plastic deformation. When a force acts in a direction to pull out the insertion portion, the load on the first retaining portion is likely to be large. Therefore, by suppressing deformation of the first holding portion, the engagement force between the cover and the fixed member can be further increased. Also, because the locking portion is provided near the insertion opening, it is possible to eliminate the need for complicated operations compared to locking at the back of the holding portion.

[0008] In this case, it is preferable that the extension portion extends linearly from the first base portion toward the first holding portion in the held state so as to be inclined. With the above configuration, since the extension portion extends while being bent from the first base portion toward the first holding portion, the first base portion and the second base portion are arranged parallel to each other in the held state. Therefore, the first skin and the second skin can be attached to the fixed member so as to be in close contact with each other and prevent steps from being formed in the skins.

[0009] In this case, the protrusion may be disposed at a position closer to the connecting portion than the locking portion in the insertion direction. With the above configuration, the insertion portion is locked to the locking portion at the front side and abuts against the protrusion at the rear side, making it easy to insert the insertion portion into the holding portion and to easily engage it.

[0010] In this case, the tip of the insertion portion may be in contact with the connecting portion in the held state. With the above configuration, the insertion portion is held by the holding portion at three points, namely, the tip, the locked portion, and the extending portion, thereby improving the stability of the insertion portion.

[0011] In this case, the holding portion may be provided on the first holding portion and may have a movement suppressing portion that suppresses movement of the first fixing member in the transverse direction in the held state, and the movement suppressing portion may be provided at a position facing the locking portion across the insertion opening in the transverse direction. This configuration can suppress movement of the insertion portion in the transverse direction relative to the holding portion. If the gap between the insertion portion and the holding portion is wide and the insertion portion moves significantly, there is a risk that the holding portion and the insertion portion will come into contact when the second fixing member is released from the first fixing member, causing abnormal noise. Therefore, by suppressing movement of the insertion portion relative to the holding portion with the movement suppressing portion, the generation of abnormal noise can be suppressed.

[0012] In this case, the movement suppressing portion may protrude from the first holding portion toward the second holding portion, and in the held state, a gap may be formed between the protruding end of the movement suppressing portion and the locked portion. With the above configuration, by reducing the gap between the insertion portion and the holding portion while providing a space for insertion, it is possible to make it easier to insert the insertion portion into the holding portion.

[0013] In this case, the length from the first holding portion to the protruding end in the transverse direction may be shorter than the length from the first holding portion to the protruding end of the protrusion. With the above configuration, the insertion space is enlarged, making it easier to insert the insertion portion into the holding portion.

[0014] In this case, the locking portion may have a convex portion that protrudes from the second holding portion side toward the first holding portion side and that locks into a concave portion formed in the locked portion in the holding state, and the convex portion may abut against the concave portion from the cross direction in the holding state. With the above configuration, by abutting the convex portion of the locking portion against the concave portion of the locked portion, it is possible to further restrict rotation of the insertion portion relative to the holding portion.

[0015] In this case, the locked portion may have a locking guide portion for guiding the recessed portion to the protruding portion. With the above configuration, the locking guide portion makes it easier to lock the locking portion to the locked portion, and the cover can be attached to the fixed member more easily.

[0016] In this case, the extension portion may extend linearly and inclined from the first base portion toward the first holding portion in the held state, and the locking guide portion may be an inclined surface formed between the recess on the second holding portion side and the extension portion. With the above configuration, the extension portion extends in a curved manner from the first base portion toward the first holding portion side, so that the first base portion and the second base portion are arranged parallel to each other in the held state. Therefore, the first skin and the second skin can be tightly attached to the fixed member without creating a step in the skin. Furthermore, the locking guide portion makes it easier to lock the locking portion to the locked portion, making it even easier to attach the skin to the fixed member.

[0017] In this case, the width of the tip portion is preferably smaller than the width of the locking guide portion in the transverse direction. With the above configuration, the width of the tip portion is smaller than the width of the locking guide portion, so the insertion portion can be more easily inserted into the holding portion. Furthermore, since the width of the locking guide portion is formed large, the rigidity of the insertion portion can be increased.

[0018] The above-mentioned problem is solved by a method for fixing an upholstery to a fixed member by inserting a first fixing member connected to the upholstery into a second fixing member provided on a fixed member, the method including: an insertion step of inserting an insertion portion of the first fixing member into an interior of a holding portion of the second fixing member through an insertion opening provided on the holding portion of the second fixing member; and an abutting step of abutting an extending portion of the insertion portion, the extending portion extending in an insertion direction in which the insertion portion is inserted into the holding portion, against a protrusion provided on the holding portion that protrudes in a transverse direction intersecting the insertion direction and restricts rotation of the insertion portion, wherein in the insertion step, a tip end of the extending portion having a width smaller than the width of the insertion opening in the transverse direction is inserted through the insertion opening, and in the abutting step, the linearly extending tip end is abutted against the protrusion from the transverse direction. With the above configuration, partial abutment of the linearly extending tip end with the protrusion makes it easier to insert the insertion portion into the holding portion while restricting rotation of the insertion portion. Furthermore, because the width of the tip is smaller than the width of the insertion opening, the insertion portion can be easily inserted into the holding portion, making it easy to attach the cover to the fixed member and increasing the engagement force between the cover and the fixed member.

[0019] In this case, a locking step may be included in which a locking portion having a convex portion provided in the holding portion near the insertion opening and having a concave portion is locked to a locked portion provided in the insertion portion, and in the locking step, the insertion portion is inserted so that a locking guide portion formed between the concave portion and the extension portion overcomes the locking portion, thereby locking the convex portion into the concave portion. With the above configuration, the locking guide portion makes it easier to lock the locking portion to the locked portion, and the cover can be attached to the fixed member more easily.

[0020] According to the present invention, the skin can be easily attached to the fixed member, and the engagement force between the skin and the fixed member can be increased. Also, according to the present invention, the skin can be attached to the fixed member without creating steps in the skin. Also, according to the present invention, the insertion portion can be easily inserted into the holding portion, and can be easily engaged. Also, according to the present invention, the stability of the insertion portion can be improved. Also, according to the present invention, the generation of abnormal noise can be suppressed. Also, according to the present invention, the insertion portion can be easily inserted into the holding portion. Also, according to the present invention, the rotation of the insertion portion relative to the holding portion can be further restricted. Also, according to the present invention, the skin can be more easily attached to the fixed member. Also, according to the present invention, the insertion portion can be more easily inserted into the holding portion. Also, the rigidity of the insertion portion can be increased.

[0021] 1 is a perspective view of a vehicle seat of the present embodiment; FIG. 2 is a perspective view of the vehicle seat as seen from the rear; FIG. 3 is a cross-sectional view of the vehicle seat, showing a state in which an upholstery is attached to a padding material; FIG. 4 is a perspective view of an upholstery fixing device; FIG. 5 is a front view of a holding member; FIG. 6 is a front view of an inserting member; FIG. 7 is a view showing a first step of inserting an inserting portion into a holding portion; FIG. 8 is a view showing a second step of inserting an inserting portion into a holding portion; FIG. 9 is a view showing a third step of inserting an inserting portion into a holding portion; FIG. 10 is a cross-sectional view of an inserting member of a modified example; FIG. 11 is a view explaining the positional relationship between the upholstery fixing device and an airbag device in a vehicle seat of a second embodiment;

[0022] Hereinafter, an embodiment of the present invention will be described with reference to Figures 1 to 9. In the following description, the "front-rear direction" refers to the front-rear direction of the vehicle seat, which is the direction that coincides with the direction of travel when the vehicle is traveling. The "seat width direction" refers to the width direction of the vehicle seat, which is the direction that coincides with the left-right direction as seen by an occupant seated in the vehicle seat. The "up-down direction" refers to the up-down direction of the vehicle seat, which is the direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane.

[0023] First Embodiment As shown in Fig. 1, a vehicle seat S of this embodiment is a seat that is placed on a vehicle body floor and in which a vehicle occupant sits. In this embodiment, the vehicle seat S is used as a front seat corresponding to the front seats of the vehicle. However, the vehicle seat S is not limited to this, and may also be a rear seat of the vehicle, or may be used as a middle seat in the second row or a rear seat in the third row in a vehicle that has three rows of seats in the front-to-rear direction.

[0024] <Overall Structure of the Seat> As shown in Fig. 1, the vehicle seat S is mainly composed of a seat body having a seat back 1, a seat cushion 2, and a headrest 3. The vehicle seat S has a seat frame F provided therein. The seat back 1 and the seat cushion 2 have a pad material P arranged on the seat frame F and a skin T that covers the pad material P.

[0025] As shown in Fig. 1, the seat back 1 is a backrest portion that supports the back of an occupant from behind, and is configured by placing a padding material P on a back frame Fa that forms the skeleton of the seat back 1 and covering it with a skin T. In addition, as shown in Fig. 2, a backboard B is attached to the rear surface of the seat back 1.

[0026] As shown in Figure 3, a groove Pa extending in the seat width direction is formed in the lower end portions of the seat back 1 and the backboard B in the up-down direction. More specifically, the groove Pa is formed between the front pad material P1 of the seat back 1 and the rear pad material P2 of the backboard B. A skin fixing device K extending longitudinally in the seat width direction is provided in the groove Pa. Specifically, a holding member 10 (corresponding to a second fixing member) of the skin fixing device K, which will be described later, is attached to the groove Pa, and the skin T is fixed to the pad material P by inserting an insert member 20 (corresponding to a first fixing member) of the skin fixing device K into the holding member 10. The skin fixing device K is positioned so as to overlap the back frame Fa (not shown in Figure 3) in the seat front-rear direction.

[0027] 1, the seat cushion 2 is a seating portion that supports the occupant from below, and is configured by placing a pad material P on a cushion frame Fb that forms the skeleton of the seat cushion 2 and covering it with a skin T. The headrest 3 is a head portion that supports the occupant's head from behind, and is configured by placing a pad material on a pillar (not shown) that serves as a core material and covering it with a skin material.

[0028] As shown in FIG. 3 , the cover T is attached to the vehicle seat S so as to cover the padding P under tension. Specifically, the front cover T1 (corresponding to the second cover) on the seat back 1 side is connected to the holding member 10 of the cover fixing device K, and the rear cover T2 (corresponding to the first cover) on the backboard B side is connected to the inserting member 20 of the cover fixing device K. The inserting member 20 is inserted into the holding member 10, and the cover T is attached to the padding P so that the front cover T1 and the rear cover T2 are flush with each other at the lower end of the seat back 1. The flushness of the cover T improves the appearance. The cover T is attached to both the holding member 10 and the inserting member 20 of the cover fixing device K, but it is sufficient if the cover T is attached to at least one of them. For example, the skin T may be provided only on the insert member 20, and the skin T may be attached to the pad material P by engaging the second fixing member with the holding member 10 provided on the pad material P.

[0029] As shown in Fig. 3, the pad material P has a cushion portion formed of a foam, and the cushion portion is covered with a skin T. Examples of the foam include polypropylene bead foam, polyethylene bead foam, polypropylene foam, polyethylene foam, acrylonitrile-styrene foam, ethylene vinyl acetate copolymer resin, urethane foam, etc., or a combination of these. In this embodiment, the pad material P is a polyurethane pad formed by foam molding using a urethane foaming agent.

[0030] <Skin fixing device> As shown in Fig. 3, the skin fixing device K is a device for fixing the skin T to the padding material P, and has a holding member 10 connected to the front skin T1 and an inserting member 20 connected to the rear skin T2. ​​The holding member 10 is connected to the front skin T1 and is provided on the padding material P. The inserting member 20 is connected to the rear skin T2 and is inserted into the holding member 10. The skin T is attached to the padding material P by inserting the inserting member 20 into the holding member 10.

[0031] In this embodiment, the front cover T1 is fixed to the seat back 1 and the rear cover T2 is fixed to the backboard B by the cover fastening device K, but this is not limiting. For example, the cover fastening device K may be provided on the seat back 1 of a vehicle seat S that does not have a backboard B. The cover fastening device K may also be disposed near a rear side airbag in a rear seat. Furthermore, the cover fastening device K may be provided on the seat cushion 2, or on an interior part of a vehicle such as a headrest 3, an armrest, or a vehicle door. The cover fastening device K may also be provided on a fixed member other than the pad material P.

[0032] As shown in FIGS. 4 to 6 , the skin fixing device K is an engaging member extending longitudinally in the seat width direction, and an insertion member 20 is inserted into and engaged with the holding member 10. The skin fixing device K is formed of an elastic resin material, such as polypropylene. In the following description, as shown in FIG. 4 , the direction in which the skin fixing device K extends longitudinally is referred to as the “lengthwise direction.” Furthermore, as shown in FIGS. 3 , 5 , and 6 , the insertion direction in which the insertion member 20 is inserted into the holding member 10, which is the longitudinal direction when the skin fixing device K is viewed from the lengthwise direction, is referred to as the “height direction.” Furthermore, the transverse direction intersecting the insertion direction, which is the short side direction when the skin fixing device K is viewed from the lengthwise direction, is referred to as the “width direction.” Note that, as shown in FIG. 3 , the “width direction” and the “transverse direction” coincide with the front-rear direction of the seat. Furthermore, the “height direction” and the “insertion direction” coincide with the up-down direction of the seat.

[0033] <Retaining Member> As shown in Figures 3 to 5, the retaining member 10 has an inverted J-shaped cross section and includes a retaining base 11 to which the front skin T1 is connected, and a retaining portion 12 connected to the retaining base 11 and into which the retaining member 10 is inserted. The front skin T1 corresponds to the second skin, the retaining member 10 corresponds to the second fixing member, and the retaining base 11 corresponds to the second base. The retaining member 10 is disposed inside the groove portion Pa of the padding material P. Specifically, the front surface of the retaining base 11 is disposed on the rear surface of the front padding material P1. The retaining portion 12 is disposed so as to straddle the front padding material P1 and the rear padding material P2. The retaining member 10 may also be disposed so as to be embedded in the padding material P by insert molding.

[0034] As shown in Fig. 5, the retaining base 11 is a portion that extends linearly in the height direction. The thickness of the retaining base 11 is formed to be thinner than the thickness of the retaining portion 12 (specifically, the first retaining portion 13 described below). As shown in Fig. 3, a front skin T1 is attached to the retaining base 11. More specifically, the front skin T1 is sewn to the middle portion of the retaining base 11 in the height direction by a front sewing thread T1a. When the retaining member 10 is placed on the front pad material P1 of the seat back 1, the front skin T1 is attached to the rear surface of the retaining base 11, extends downward, bends to cover the bottom of the retaining base 11, and is placed on the front pad material P1 so as to extend forward.

[0035] As shown in FIG. 5 , the holding portion 12 has an inverted U-shaped cross section and extends from the holding base 11. As shown in FIG. 3 , the holding portion 12 holds the insertion member 20 when the holding member 10 and the insertion member 20 are engaged. The holding portion 12 includes a first holding portion 13 that holds the insertion member 20 from one side in the transverse direction, a second holding portion 14 that holds the insertion member 20 from the other side in the transverse direction, a connecting portion 15 that connects the first holding portion 13 and the second holding portion 14, a protrusion 16 that restricts rotation of the insertion member 20, a movement suppressing portion 17 that suppresses movement of the insertion member 20 in the transverse direction, a locking portion 18 that locks onto the insertion member 20, and an insertion opening 19 through which an insertion portion 22 (described later) is inserted into the holding portion 12. The first holding portion 13, the second holding portion 14, and the connecting portion 15 are arranged to surround the insertion portion 22 of the insertion member 20 (described later).

[0036] As shown in Fig. 5, the first retaining portion 13 is a portion that extends linearly from the retaining base 11 along the insertion direction (height direction). A protrusion 16 that protrudes toward the inside of the retaining portion 12 is formed at an intermediate portion of the first retaining portion 13 in the height direction. In addition, a movement suppressing portion 17 that protrudes toward the inside of the retaining portion 12 is formed at the lower end of the first retaining portion 13. As shown in Fig. 3, when the retaining member 10 and the insertion member 20 are engaged and the insertion portion 22 is in a retained state held by the retaining portion 12, the first retaining portion 13 holds the insertion portion 22 from one side (front side) in the transverse direction (width direction).

[0037] As shown in Fig. 5, the second retaining portion 14 is a portion that bends from the first retaining portion 13 and extends from the connection portion 15, and is disposed at a position facing the first retaining portion 13. A locking portion 18 that protrudes toward the inside of the retaining portion 12 is formed at the lower end portion in the height direction of the second retaining portion 14. As shown in Fig. 3, when the retaining member 10 and the inserting member 20 are engaged with each other and the inserting portion 22 is held by the retaining portion 12 in a retained state, the second retaining portion 14 holds the inserting portion 22 from the other side (rear side) in the transverse direction (width direction).

[0038] 5, the second holding portion 14 has an inclined portion 14a that inclines downward from the connecting portion 15 and moves away from the first holding portion 13, and an extending portion 14b that extends linearly downward from the inclined portion 14a. The holding portion 12 is provided with the inclined portion 14a so that the distance between the first holding portion 13 and the second holding portion 14 narrows toward the connecting portion 15. This allows the holding member 10 to have a compact shape.

[0039] Further, the second holding portion 14 is formed with a connection guide portion 14c that guides the insertion portion 22 to the connection portion 15. Specifically, the connection guide portion 14c that guides the tip 22a of the insertion portion 22 to the connection portion 15 when the insertion portion 22 is inserted into the holding portion 12 is formed on the inner surface of the inclined portion 14a.

[0040] The connection guide portion 14c is an inclined surface that slopes toward the first holding portion 13 as it approaches the connecting portion 15, and is positioned opposite the protrusion guide portion 16a (described later). Because the connection guide portion 14c slopes toward the first holding portion 13 (front side in the width direction) in the insertion direction (upward in the height direction), the tip 22a of the insertion portion 22 is guided toward the connecting portion 15 by the connection guide portion 14c. This allows the insertion portion 22 to be smoothly inserted into the holding portion 12, thereby reducing the number of steps in the skin attachment work and improving work efficiency. Furthermore, because the insertion portion 22 is guided by the connection guide portion 14c when inserted into the holding portion 12, the skin T can be attached by the simple operation of inserting the insertion portion 22 from below upward. This eliminates the need for complex work, and allows for automatic installation by machine as well as manual work.

[0041] As shown in Fig. 5, the connecting portion 15 is a portion that connects the first holding portion 13 and the second holding portion 14. Specifically, the connecting portion 15 extends and curves from the first holding portion 13, and connects to the inclined portion 14a of the second holding portion 14. As shown in Fig. 3, in a holding state in which the insertion portion 22 is held by the holding portion 12, the connecting portion 15 is disposed at a position opposite to the tip 22a of the insertion portion 22 in the insertion direction.

[0042] As shown in Fig. 5, the protrusion 16 is provided on the first retaining portion 13 and is a mountain-shaped portion that protrudes from the first retaining portion 13 toward the second retaining portion 14. Specifically, the protrusion 16 is formed on the inner surface of the first retaining portion 13 near the connecting portion 15. In other words, the protrusion 16 is disposed at a position closer to the connecting portion 15 than the locking portion 18 in the insertion direction. The protrusion 16 is formed with a protrusion guide portion 16a that guides the insertion portion 22 to the connecting portion 15. The protrusion guide portion 16a is a tapered surface that becomes thinner from the first retaining portion 13 side toward the second retaining portion 14 side. In other words, the protrusion guide portion 16a is a lower inclined surface of the mountain-shaped protrusion 16.

[0043] Because the protrusion guide portion 16a is inclined toward the second holding portion 14 in the insertion direction, the tip 22a of the insertion portion 22 is guided by the protrusion guide portion 16a toward the connection portion 15. Therefore, the insertion portion 22 is smoothly inserted into the holding portion 12, which reduces the number of steps in the skin attachment work and improves work efficiency. Furthermore, because the insertion portion 22 is guided by the protrusion guide portion 16a when it is inserted into the holding portion 12, the skin T can be attached by the simple operation of inserting the insertion portion 22 from below toward above.

[0044] 3, the protrusion 16 abuts against the insertion portion 22 of the insertion member 20 to restrict the rotation of the insertion portion 22. More specifically, the protrusion end 16b of the protrusion 16 abuts against a tip end 24a of the extension portion 24 (described later) in the insertion direction from a direction intersecting the insertion direction.

[0045] As shown in Fig. 3, in the holding state in which the insertion portion 22 is held by the holding portion 12, when a force is applied in a direction to pull the insertion portion 22 of the insertion member 20 out of the holding portion 12 of the holding member 10 (downward in the height direction), the tip 22a of the insertion member 20 attempts to rotate toward the first holding portion 13 (front side in the width direction) with the locking portion 18 as a fulcrum. At this time, the tip 24a of the extension portion 24 abuts against the protruding end portion 16b of the protrusion 16, thereby restricting the rotation toward the first holding portion 13. Note that in the holding state, the extension portion 24 does not need to abut against the protrusion 16 at all times. It is sufficient that the rotation is restricted when the extension portion 24 abuts against the protrusion 16 when a force is applied in the direction to pull out the insertion portion 22.

[0046] Furthermore, for example, when inserting the insertion portion 22 into the holding portion 12, if an attempt is made to restrict rotation by inserting it at the deep end (near the connection portion 15), this can be a complicated operation and can reduce work efficiency. In this embodiment, the linearly extending extension portion 24 restricts rotation simply by abutting against the protrusion 16, so the insertion portion 22 can be easily inserted up to the rotation-restricted position. In this way, the protrusion 16 partially abuts against the tip 24a of the extension portion 24 of the insertion portion 22, making it easier to insert the insertion portion 22 into the holding portion 12 while restricting rotation of the insertion portion 22.

[0047] Furthermore, by providing the protrusion 16 on the first retaining portion 13, plastic deformation of the first retaining portion 13 is less likely to occur. More specifically, when a force acts in the direction of pulling out the insertion portion 22, the rotation of the insertion member 20 may apply a force to the first retaining portion 13, causing the first retaining portion 13 to undergo plastic deformation. Here, by forming the protrusion 16 as the starting point of plastic deformation, the rigidity of the first retaining portion 13 can be increased. In this way, the protrusion 16 is provided at a position that suppresses deformation of the retaining member 10, so deformation can be suppressed with a minimal configuration. Therefore, the rigidity of the retaining member 10 can be increased without increasing the thickness of the first retaining portion 13.

[0048] 5, the movement suppressing portion 17 is provided on the first holding portion 13 and is a trapezoidal portion that protrudes from the first holding portion 13 toward the second holding portion 14. Specifically, the movement suppressing portion 17 is formed on the inner surface of the first holding portion 13 near the holding base 11, and is disposed in a position facing the locking portion 18. The movement suppressing portion 17 is formed on its inner end surface with a protruding end portion 17a that faces the insertion portion 22 in the held state, a movement guide portion 17b that guides the insertion portion 22 to the connection portion 15, and a holding positioning portion 17c that positions the front skin T1.

[0049] 3, the movement suppressing portion 17 is provided at a position facing the locked portion 23 of the insertion portion 22 in the held state, and suppresses movement in the transverse direction in the held state. Furthermore, in the held state, a gap SP is formed between the protruding end 17a of the movement suppressing portion 17 and the locked portion 23. More specifically, when a force is applied in a direction to pull out the insertion portion 22 in the held state, the inclined surface 23c of the locked portion 23 (described later) abuts against the protruding end 17a of the movement suppressing portion 17 from the transverse direction, thereby suppressing movement in the transverse direction.

[0050] 5, in the transverse direction, a length H3 from the first retaining portion 13 to the protruding end 17a is shorter than a length H4 from the first retaining portion 13 to the protruding end 16b of the protrusion 16. In this way, by reducing the thickness of the movement suppressing portion 17 and enlarging the insertion space (insertion opening 19), it is possible to make it easier to insert the insertion portion 22 into the retaining portion 12. Furthermore, by increasing the thickness of the protrusion 16, plastic deformation of the first retaining portion 13 can be further suppressed.

[0051] For example, if the gap SP between the holding portion 12 and the insertion portion 22 is large, there is a risk that the insertion portion 22 will come into contact with the holding portion 12 when the insertion portion 22 is pulled out, causing abnormal noise. In this embodiment, the movement suppression portion 17 narrows the gap SP between the holding portion 12 and the insertion portion 22, thereby suppressing the generation of abnormal noise. Furthermore, by providing a space in the holding portion 12 for inserting the insertion portion 22 while reducing the gap SP between the holding portion 12 and the insertion portion 22, it is possible to make it easier to insert the insertion portion 22 into the holding portion 12.

[0052] The movement guide portion 17b is a tapered surface that becomes narrower from the first holding portion 13 side toward the second holding portion 14 side. In other words, the movement guide portion 17b is a lower inclined surface of the trapezoidal movement suppressing portion 17. Because the movement guide portion 17b is inclined toward the second holding portion 14 side in the insertion direction, the tip 22a of the insertion portion 22 is guided toward the connection portion 15 by the movement guide portion 17b. Therefore, the insertion portion 22 is smoothly inserted into the holding portion 12, which reduces the number of steps in the skin attachment work and improves work efficiency. Furthermore, because the insertion portion 22 is guided by the movement guide portion 17b when inserted into the holding portion 12, the skin T can be attached by the simple operation of inserting the insertion portion 22 from below toward above.

[0053] The holding positioning portion 17c is the lower end surface of the trapezoidal movement suppressing portion 17. As shown in Fig. 3, when the front skin T1 is attached to the holding base 11, the front attachment end T1b of the front skin T1 abuts against the holding positioning portion 17c from below, thereby determining the attachment position. In this way, the attachment position of the front skin T1 is determined by the holding positioning portion 17c, so that the front skin T1 can be attached without misalignment when sewn to the holding member 10. Furthermore, when the insert member 20 is engaged with the holding member 10, the skin T can be attached to the pad material P so that the front skin T1 and the rear skin T2 are flush with each other on the outer surface of the seat.

[0054] 5, the locking portion 18 is provided at the lower end of the second holding portion 14 in the height direction. Specifically, the locking portion 18 protrudes from the second holding portion 14 side toward the first holding portion 13 side, and is disposed at a position facing the movement suppressing portion 17. Since the locking portion 18 is provided near the insertion opening 19 in the holding portion 12 (on the near side in the insertion direction), the locking portion 18 can be easily locked to the locked portion 23.

[0055] 3, in the held state, the locking portion 18 is locked to the locked portion 23 of the insertion portion 22. More specifically, the locking portion 18 has a protrusion 18a that is locked to a recess 23a formed in the locked portion 23 in the held state.

[0056] As shown in Fig. 6, the protrusion 18a protrudes toward the insertion opening 19 at the locking portion 18. As shown in Fig. 3, the protrusion 18a abuts against the recess 23a in the transverse direction in the held state. Specifically, the protruding end surface 18b of the protrusion 18a abuts against the inner surface of the recess 23a, and the locking portion 18 is locked to the locked portion 23. Furthermore, the upper end surface 18c of the protrusion 18a abuts against the inner surface of the recess 23a, and the locking portion 18 is locked to the locked portion 23. In this way, by abutting the protrusion 18a against the recess 23a, it is possible to restrict rotation of the insertion portion 22 around the locking portion 18 as a fulcrum when a force is applied in the direction of pulling out the insertion portion 22.

[0057] The insertion opening 19 is a gap extending in the longitudinal direction for inserting the insertion portion 22 into the inside of the holding portion 12. The insertion opening 19 is provided in the transverse direction between the locking portion 18 and the movement suppressing portion 17 of the first holding portion 13. In other words, the movement suppressing portion 17 is provided at a position opposing the locking portion 18 with the insertion opening 19 interposed therebetween in the transverse direction.

[0058] <Insertion Member> As shown in Figures 3, 4, and 6, the insertion member 20 has a generally I-shaped cross section and includes an insertion base 21 to which the rear skin T2 is connected, and an insertion portion 22 connected to the insertion base 21 and inserted into the holding member 10. The rear skin T2 corresponds to the first skin, the insertion member 20 corresponds to the first fixing member, and the insertion base 21 corresponds to the first base. The insertion member 20 is inserted into the holding portion 12 of the holding member 10 and disposed inside the padding P. Specifically, the insertion base 21 is disposed between the holding base 11 and the rear padding P2, with the rear surface of the insertion base 21 abutting against the front surface of the rear padding P2. The insertion portion 22 is inserted into the holding portion 12 of the holding member 10 and engaged with the engaging portion 18.

[0059] As shown in Fig. 6, the insertion base 21 is a portion that extends linearly in the height direction. The thickness (length in the width direction) of the insertion base 21 is formed to be thicker than the holding base 11. As shown in Fig. 3, a rear skin T2 is attached to the insertion base 21. More specifically, the rear skin T2 is sewn to the middle part of the insertion base 21 in the height direction with a rear sewing thread T2a. When the insertion member 20 is inserted into and engaged with the holding member 10, the rear skin T2 is attached to the front surface of the insertion base 21 and extends downward, bends to cover the bottom of the insertion base 21, and is placed on the rear pad material P2 so as to extend rearward.

[0060] As shown in Fig. 6, the insertion portion 22 is a portion that extends upward from the insertion base portion 21. As shown in Fig. 3, the insertion portion 22 is inserted from below upward, and is held by the holding portion 12 at a position where the tip 22a of the insertion portion 22 faces the connection portion 15. The insertion portion 22 has an engaged portion 23 that is engaged with the holding portion 12 in the held state, and a linear extending portion 24 that extends in the insertion direction in which the insertion member 20 is inserted into the holding member 10.

[0061] 6, the locked portion 23 is provided at the lower end of the insertion portion 22 (between the insertion base 21 and the extension portion 24), and is a portion with which the locking portion 18 of the holding portion 12 locks in the held state. The locked portion 23 is formed with a recess 23a for locking with the protrusion 18a of the locking portion 18, a locking guide portion 23b for guiding the recess 23a to the protrusion 18a, a sloped portion 23c formed on the front side of the recess 23a, and an insertion positioning portion 23d for positioning the rear skin T2.

[0062] 3, the recess 23a has a concave cross section and is provided at a position facing the locking portion 18 of the holding portion 12 in the held state. In the held state, the protrusion 18a of the locking portion 18 is locked into the recess 23a. By locking the protrusion 18a into the recess 23a, the insertion portion 22 is less likely to come off the holding portion 12 when a force acts in the direction of pulling out the insertion portion 22 and the insertion portion 22 rotates around the recess 23a as a fulcrum.

[0063] Furthermore, for example, when inserting the insertion portion 22 into the holding portion 12, if an attempt was made to lock the insertion portion 22 at the far end of the insertion (near the connection portion 15) to prevent rotation, this would be a complicated operation and could reduce work efficiency. In this embodiment, the locking portion 18 is locked to the locked portion 23 at the near end in the insertion direction (toward the insertion base 21), making it possible to easily insert the insertion portion 22 into the holding portion 12 while restricting rotation of the insertion portion 22. Furthermore, because the locking portion 18 is provided at the near end in the insertion direction, the insertion member 20 can be easily removed from the holding member 10 by widening the locking portion 18 rearward in the width direction when removing the insertion portion 22 from the holding portion 12.

[0064] As shown in Figure 6, the locking guide portion 23b is an inclined surface formed between the recess 23a on the second holding portion 14 side and the extending portion 24. The width H1 of the tip end 24a of the extending portion 24 is smaller than the width H5 of the locking guide portion 23b in the transverse direction. Because the tip end 24a is formed to be thin, the insertion portion 22 can be inserted even more easily. In addition, because the locking guide portion 23b is formed to be thick, the rigidity of the insertion portion 22 can be increased.

[0065] 3, in the held state, the locking guide portion 23b is positioned opposite the extending portion 14b of the second holding portion 14. The locking guide portion 23b is inclined toward the first holding portion 13 in the insertion direction, and therefore guides the recessed portion 23a onto the protruding portion 18a. Therefore, the protruding portion 18a of the locking portion 18 is smoothly locked into the recessed portion 23a of the locked portion 23, which reduces the number of steps in the skin attachment work and improves work efficiency.

[0066] As shown in Fig. 6, the inclined surface 23c is an inclined surface formed between the recess 23a on the second holding portion 14 side and the insertion positioning portion 23d. As shown in Fig. 3, in the holding state, the inclined surface 23c is positioned opposite the protruding end 17a of the movement suppressing portion 17. In the holding state, the inclined surface 23c, together with the movement suppressing portion 17, suppresses the widthwise movement of the recess 23a. The inclined surface 23c suppresses the widthwise movement of the recess 23a, while allowing for a compact shape. Furthermore, since the inclined surface 23c is inclined so as to connect the recess 23a and the insertion positioning portion 23d, the rigidity of the locked portion 23 can be increased.

[0067] As shown in Fig. 6, the insertion positioning portion 23d is the lower end of the sloped portion 23c and determines the position of the rear skin T2. ​​Specifically, as shown in Fig. 3, when the rear skin T2 is attached to the insertion base 21, the rear attachment end T2b of the rear skin T2 abuts against the insertion positioning portion 23d from below, thereby determining the attachment position. In this way, the attachment position of the rear skin T2 is determined by the insertion positioning portion 23d, so that the rear skin T2 can be attached without misalignment when sewn to the insert member 20. Furthermore, as described above, when the insert member 20 is engaged with the holding member 10, the skin T can be attached to the padding P so that the front skin T1 and the rear skin T2 are flush with each other on the outer surface of the seat.

[0068] As shown in Fig. 6, the extension portion 24 has a generally I-shaped cross section, extends linearly from an upper portion of the locked portion 23 in the insertion direction (upward in the height direction), and is inclined forward in the width direction. As shown in Fig. 3, in the held state, the extension portion 24 extends linearly and inclined from the insertion base 21 toward the first holding portion 13. When the insertion portion 22 is inserted into the holding portion 12, the upper end of the extension portion 24 (tip 22a of the insertion portion 22) is guided by the movement guide portion 17b, the protrusion guide portion 16a, and the connection guide portion 14c, and is inserted to a position facing the connection portion 15.

[0069] The tip 24a of the extension 24 in the insertion direction (specifically, the flat surface of the extension 24 on the first holding portion 13 side) extends linearly. The tip 24a abuts against the protrusion end 16b of the protrusion 16 from the intersecting direction. In this manner, the tip 24a of the extension 24 extending linearly (the tip 22a side of the insertion portion 22) abuts against the protrusion 16, restricting rotation. The partial abutment of the extension 24 against the protrusion 16 makes it easier to insert the insertion 22 into the holding portion 12, while restricting rotation of the insertion 22.

[0070] 3, the width H1 of the tip 24a is smaller than the width H2 of the insertion opening 19 in the transverse direction. Because the thickness of the tip 24a of the extension 24 is small, the insertion portion 22 can be easily inserted into the holder 12. Furthermore, the tip 22a of the insertion portion 22 abuts against the connection portion 15 in the held state. Therefore, the insertion portion 22 is held by the holder 12 at three points, the tip 22a, the locked portion 23, and the extension 24, in the held state, thereby improving stability.

[0071] Furthermore, the extension portion 24 is bent toward the first holding portion 13 relative to the insertion base 21 in the insertion direction. Therefore, in the held state, the holding base 11 and the insertion base 21 are parallel to each other along the insertion direction, so that the front skin T1 and the rear skin T2 are tightly attached to each other, and the skin T can be attached to the pad material P without creating any steps in the skin T.

[0072] In this way, by reducing the thickness of the tip 24a of the extension portion 24, the insertion portion 22 can be easily inserted into the holding portion 12. Furthermore, by the protrusion 16 partially abutting the tip 24a of the insertion portion 22, it is possible to restrict rotation of the insertion portion 22 while facilitating insertion of the insertion portion 22 into the holding portion 12. Furthermore, the protrusion 16 improves the rigidity of the holding portion 12, thereby preventing plastic deformation of the holding portion 12. Therefore, even if an external force acts in a direction that moves the epidermis T away from the pad material P (fixed member), it is possible to prevent the insertion portion 22 from coming off the holding portion 12, and the engagement force between the epidermis T and the pad material P can be increased.

[0073] <Coverage Fixing Method> Next, a coverage fixing method for fixing the coverage T to the padding material P (corresponding to the fixed member) will be described. Specifically, the coverage fixing method for fixing the coverage T to the padding material P by inserting an inserting member 20 (corresponding to a first fixing member) connected to the coverage T into a holding member 10 (corresponding to a second fixing member) provided on the padding material P will be described with reference to Figures 7A to 7D. The coverage fixing method includes an "insertion step" of inserting the insertion portion 22 of the inserting member 20 into the holding portion 12 of the holding member 10 through an insertion opening 19 provided in the holding portion 12; an "abutment step" of abutting the extending portion 24 extending in the insertion direction against the protruding portion 16 that protrudes in the intersecting direction and restricts rotation of the insertion portion 22; and an "engagement step" of engaging the engaging portion 18 with the engaged portion 23. It is also possible to abut the extending portion 24 against the protruding portion 16, and then engage the locking portion 18 with the locked portion 23, or to abut the extending portion 24 against the protruding portion 16, and then engage the locking portion 18 with the locked portion 23. The "abutting step" and the "locking step" may be performed simultaneously.

[0074] 7A , in the "insertion step," the worker inserts the tip 24a of the extension portion 24 through the insertion opening 19 and inserts the extension portion 24 into the holding portion 12. More specifically, the worker grips the insertion base 21 to which the rear skin T2 is connected, and inserts the tip 24a from the insertion opening 19 upward into the holding portion 12. At this time, the tip 22a of the insertion portion 22 is guided inside the holding portion 12 by the movement guide portion 17b of the movement suppressing portion 17 and abuts against the protrusion guide portion 16a.

[0075] 7B, the operator inserts insertion portion 22 further upward. At this time, tip 22a of insertion portion 22 is guided toward connecting portion 15 by protrusion guide portion 16a of protrusion 16. Furthermore, convex portion 18a of locking portion 18 is guided into concave portion 23a by locking guide portion 23b of locked portion 23.

[0076] 7C , in the "contact step," the operator inserts the insertion portion 22 further upward. The tip 22a of the insertion portion 22 is further guided toward the connecting portion 15 by the protruding end portion 16b of the protruding portion 16 while elastically deforming. At this time, the linearly extending tip portion 24a contacts the protruding end portion 16b of the protruding portion 16 from the intersecting direction. Furthermore, as the second holding portion 14 elastically deforms, the convex portion 18a of the locking portion 18 is further guided into the concave portion 23a by the locking guide portion 23b of the locked portion 23.

[0077] As shown in Figure 7D, in the "locking step," the operator inserts the insertion portion 22 further upward. The tip 22a of the insertion portion 22 is guided by the connection guide portion 14c and inserted to a position facing the connection portion 15. At this time, the tip 24a of the extension portion 24 abuts against the protruding end portion 16b. The tip 22a of the insertion portion 22 then abuts against the connection portion 15. The operator then inserts the insertion portion 22 so that the locking guide portion 23b passes over the locking portion 18, and locks the convex portion 18a into the concave portion 23a. In other words, the convex portion 18a of the locking portion 18 locks into the concave portion 23a so as to pass over the locking guide portion 23b of the locked portion 23.

[0078] In this way, the extending portion 24 of the inserting portion 22 is inserted into the holding portion 12, the tip portion 24a abuts against the protruding end portion 16b in the cross direction, and the convex portion 18a is locked in the concave portion 23a, thereby establishing a held state and attaching the skin T to the padding material P. In the held state, the inserting portion 22 is held by the holding portion 12 at three points: the tip portion 22a, the locked portion 23, and the extending portion 24, thereby improving the stability of the inserting portion 22 in the held state. Note that in the held state, the front skin T1 and the rear skin T2 are in contact with each other between the holding base 11 and the inserting base 21.

[0079] In the "insertion step," the tip 24a of the extension 24, which has a width H1 smaller than the width H2 of the insertion opening 19 in the transverse direction, is inserted through the insertion opening 19, so that the operator can easily insert the insertion portion 22 into the holding portion 12. Furthermore, when inserting the insertion portion 22 into the holding portion 12, the insertion portion 22 is guided by the movement guide portion 17b, the protrusion guide portion 16a, and the connection guide portion 14c, so that the upholstery T can be attached even more easily.

[0080] In the "abutting step," the worker abuts the linearly extending tip portion 24a against the protrusion 16 from the cross direction. In the "locking step," the worker inserts the insertion portion 22 so that the locking guide portion 23b formed between the recess 23a and the extension portion 24 passes over the locking portion 18, thereby locking the protrusion 18a into the recess 23a. Therefore, the worker can easily insert the insertion member 20 from below to above into the holding member 10 so that the insertion portion 22 is held by the holding portion 12. This eliminates the need for a complex insertion operation, such as rotating the insertion member 20 at the back side of the holding portion 12 (near the connection portion 15) to engage it. Furthermore, because the insertion portion 22 is simply inserted from below to above, it can be installed automatically by machine, rather than manually.

[0081] <Modified Example of Epidermis Fixing Device> Next, a modified example of the epidermis fixing device K1 will be described with reference to Fig. 8. Note that a description of the configuration that overlaps with that of the above-described epidermis fixing device K will be omitted. The inserting member 30 of the epidermis fixing device K1 has a different shape from the inserting member 20 of the epidermis fixing device K. The inserting member 30 has an inserting base 31 to which the rear epidermis T2 is connected, and an inserting portion 32 connected to the inserting base 31 and inserted into the holding member 10.

[0082] 8, the insertion base 31 is a portion that extends linearly in the height direction. A rear skin T2 is attached to both front and rear surfaces of the insertion base 31. More specifically, the rear skin T2 is sewn to the middle of the insertion base 31 in the height direction with a rear sewing thread T2a.

[0083] As shown in Figure 8, the insertion portion 32 is a portion that extends upward from the insertion base 31 and has an engaging portion 33 that engages with the holding portion 12 in the held state, and a linear extension portion 34 that extends in the insertion direction in which the insertion member 30 is inserted into the holding member 10.

[0084] 8, the locked portion 33 has a concave cross section and includes a recess 33a for engaging with the protrusion 18a of the locking portion 18, a slope 23c formed on the front side of the recess 33a, and an insertion positioning portion 33d for positioning the rear skin T2. ​​As described above, since no slope (slope 23c of the inserting member 20) is formed on the upper portion of the recess 33a, the inserting portion 32 can be made even more compact.

[0085] Second Embodiment Next, a vehicle seat S2 of a second embodiment will be described with reference to Fig. 9. Description of configurations that overlap with those of the above-described vehicle seat S will be omitted. In the vehicle seat S2, the upholstery fixing device K is disposed in a groove portion Pa near the airbag device 40 in the rear seat.

[0086] 7, the airbag device 40 includes an airbag 41, an inflator 42 that supplies gas to the airbag 41, a base 43 to which the airbag 41 and the inflator 42 are attached, a fastener 44 that fastens the base 43 to a seat frame F, and a webbing 45 that guides the deployment of the airbag 41. The airbag device 40 is attached to the seat frame F with the fastener 44 such as a bolt, and is housed inside a pad material P. When gas is ejected from the inflator 42 and the airbag 41 is guided by the webbing 45 to inflate, the pad material P ruptures at the rupture portion Pb, the skin T is cut open, and the airbag 41 deploys outward.

[0087] The skin fixing device K is disposed in a groove portion Pa at the rear of the airbag device 40 in the seat front-rear direction. In other words, the skin fixing device K is provided on the pad material P on the side opposite to the side where the airbag 41 deploys (the side of the breaking portion Pb). As described above, the holding portion 12 of the holding member 10 has a space between the first holding portion 13 and the second holding portion 14 that narrows toward the connecting portion 15, so the skin fixing device K is configured in a compact shape. Therefore, the compact skin fixing device K can improve the freedom of arrangement of the airbag device 40. Furthermore, by improving the engaging force of the skin fixing device K, it is possible to further prevent the skin T from coming off the pad material P even when the airbag device 40 is activated due to a vehicle collision.

[0088] <Other Embodiments> The cover fastening device K may be used to attach a cover that covers a center armrest. In this case, the cover fastening device K may be attached to the rear end of the center armrest. As described above, by configuring the cover fastening device K in a compact shape, it is possible to make the center armrest easier to rotate.

[0089] In the above embodiment, a vehicle seat used in an automobile was described as a specific example, but the present invention is not limited to this and can be used for various types of seats, such as two-wheeled vehicle seats, vehicle seats for trains and buses, vehicle seats for airplanes and ships, as well as office chairs for work, wheelchairs, and child seats in shopping carts.

[0090] In this embodiment, the vehicle seat according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and of course, the present invention also includes equivalents thereof.

[0091] S, S2 Vehicle seat P Pad material (fixed member) P1 Front pad material P2 Rear pad material Pa Groove portion Pb Fracture portion T Cover T1 Front cover (second cover) T1a Front sewing thread T1b Front attachment end portion T2 Rear cover (first cover) T2a Rear sewing thread T2b Rear attachment end portion K, K1 Cover fixing device B Backboard F Seat frame Fa Back frame Fb Cushion frame 1 Seat back 2 Seat cushion 3 Headrest 10 Retaining member (second fixing member) 11 Retaining base (second base) 12 Retaining portion 13 First retaining portion 14 Second retaining portion 14a Inclined portion 14b Extension portion 14c Connection guide portion 15 Connection portion 16 Protrusion 16a Protrusion guide portion 16b Projecting end portion 17 Movement suppressing portion 17a Projecting end portion 17b Movement guide portion 17c Holding and positioning portion 18 Locking portion 18a Convex portion 18b Projecting end surface 18c Upper end surface 20 Inserting member (first fixing member) 21 Inserting base portion (first base portion) 22 Inserting portion 22a Tip portion 23 Locked portion 23a Recessed portion 23b Locking guide portion 23c Sloped portion 23d Insertion positioning portion 24 Extension portion 24a Tip portion 30 Inserting member 31 Inserting base portion 32 Inserting portion 33 Locked portion 33a Recessed portion 33d Insertion positioning portion 34 Extension portion 40 Airbag device 41 Airbag 42 Inflator 43 Base portion 44 Fixing device 45 Webbing SP Gap

Claims

1. A skin fixing device having a first fixing member connected to a first skin and a second fixing member connected to a second skin and into which the first fixing member is inserted, wherein the first fixing member has a first base to which the first skin is connected and an insertion portion connected to the first base and inserted into the second fixing member, the second fixing member has a second base to which the second skin is connected and a holding portion connected to the second base and into which the insertion portion is inserted, the insertion portion has an extending portion extending in an insertion direction in which the insertion portion is inserted into the holding portion, the holding portion has a protrusion protruding in a transverse direction intersecting the insertion direction to regulate rotation of the insertion portion, and an insertion opening through which the insertion portion is inserted into the holding portion, a tip portion of the extending portion in the insertion direction extends linearly and abuts on the protrusion portion from the transverse direction, and a width of the tip portion is smaller than a width of the insertion opening in the transverse direction.

2. The epidermis fixing device according to claim 1, characterized in that the holding portion has: a first holding portion extending from the second base portion along the insertion direction and holding the insertion portion from one side in the transverse direction; a second holding portion extending in a bent manner from the first holding portion and holding the insertion portion from the other side in the transverse direction; a connection portion connecting the first holding portion and the second holding portion, which is located at a position facing the tip of the insertion portion in the insertion direction in a holding state in which the insertion portion is held by the holding portion; and a locking portion provided at an end of the second holding portion in the insertion direction and locking with the locked portion of the insertion portion in the holding state, the protrusion portion being provided on the first holding portion and protruding from the first holding portion towards the second holding portion, and the insertion opening being provided between the locking portion and the first holding portion in the transverse direction.

3. The epidermis fixing device according to claim 2, characterized in that said extension portion extends linearly and inclined from said first base portion toward said first holding portion in said holding state.

4. The skin fixing device according to claim 2, wherein the protrusion is disposed at a position closer to the connecting portion than the locking portion is to the inserting direction.

5. The epidermis fixing device according to claim 2, characterized in that the tip of said insertion portion abuts against said connecting portion in said held state.

6. The epidermis fixing device according to claim 2, characterized in that the holding portion has a movement suppressing portion that is provided on the first holding portion and suppresses movement of the first fixing member in the transverse direction in the held state, the movement suppressing portion being provided at a position opposite the locking portion across the insertion opening in the transverse direction.

7. The epidermis fixing device according to claim 6, characterized in that the movement suppressing portion protrudes from the first holding portion toward the second holding portion, and in the held state, a gap is formed between the protruding end of the movement suppressing portion and the engaged portion.

8. The epidermis fixing device according to claim 7, characterized in that the length from said first holding portion to said protruding end in said cross direction is shorter than the length from said first holding portion to the protruding end of said protruding portion.

9. The epidermis fixing device according to claim 2, characterized in that the engaging portion has a convex portion that protrudes from the second holding portion side towards the first holding portion side and engages with a concave portion formed in the engaged portion in the holding state, and the convex portion abuts against the concave portion from the intersecting direction in the holding state.

10. The skin fixing device according to claim 9, wherein the engaged portion has an engagement guide portion for guiding the recessed portion to the protruding portion.

11. The epidermis fixing device according to claim 10, characterized in that the extension portion extends linearly and inclined from the first base portion toward the first holding portion in the held state, and the engagement guide portion is an inclined surface formed between the recess on the second holding portion side and the extension portion.

12. The epidermis fixing device according to claim 10, wherein the width of said tip portion is smaller than the width of said engaging guide portion in the cross direction.

13. A method for fixing an epidermis to a fixed member by inserting a first fixing member connected to an epidermis into a second fixing member provided on a fixed member, comprising: an insertion step of inserting an insertion portion of the first fixing member into an interior of a holding portion of the second fixing member through an insertion opening provided in the holding portion; and an abutting step of bringing an extending portion provided on the insertion portion and extending in an insertion direction in which the insertion portion is inserted into the holding portion into contact with a protrusion provided on the holding portion and protruding in a transverse direction intersecting the insertion direction to regulate rotation of the insertion portion, wherein in the insertion step, a tip portion of the extending portion having a width smaller than the width of the insertion opening in the transverse direction is inserted through the insertion opening, and in the abutting step, the tip portion extending linearly is abutted against the protrusion from the transverse direction.

14. A method for fixing a skin according to claim 13, further comprising a locking step of locking a locking portion provided in the holding portion near the insertion opening and having a convex portion, with a locked portion provided in the insertion portion and having a concave portion, wherein in the locking step, the insertion portion is inserted so that a locking guide portion formed between the concave portion and the extension portion overcomes the locking portion, and the convex portion is locked in the concave portion.

Images