End fixing structure for trim cover of vehicle seat

Abstract

To provide a structure for fixing an end of a trim cover, which can attach the end of the trim cover to the outer peripheral edge of a backboard covering the rear surface of a seat back with good appearance quality and with which the end of the trim cover is hard to come off. [Solution] This is a terminal fixing structure for a trim cover of a vehicle seat. A resin hook (8) attached to the terminal portion of a trim cover (6) has a substantially strip-shaped base portion (9), a folded portion (10) extending opposite the base portion (9), and a connecting portion (11). The base portion (9) is formed with a first thin-walled portion (12) and a second thin-walled portion (13). The terminal portion of the trim cover (6) is connected to a second portion (17) of the base portion (9). The outer peripheral terminal portion of the backboard (7) is formed with a hook portion (20) and a substantially U-shaped recessed groove portion (21) located inward in the in-plane direction from the hook portion (20). With the hook portion (20) inserted between the base portion (9) and the folded portion (10) of the resin hook (8), the base portion (9) is bent by the first thin-walled portion (12) and the second thin-walled portion (13) and inserted into the recessed groove portion (21).

Description

[Technical Field]

[0001] The present invention relates to an end fixing structure for a trim cover of a vehicle seat. [Background technology]

[0002] Conventionally, vehicle seats equipped in vehicles such as automobiles have been known in which an end of a trim cover, which is a covering material, is fixed to the outer peripheral edge of a backboard that covers the rear surface of the seatback. In the vehicle seat described in Patent Document 1, an end of the trim cover is fixed to the outer peripheral edge of a resin seatback frame that constitutes the rear surface of the seatback. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-88411 Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle seat described in the aforementioned Patent Document 1, a resin hook attached to a terminal portion of a trim cover is engaged with a terminal fold portion that is folded outward in a U-shape at a terminal portion of a seatback frame. The cross section of the resin hook that is inserted into the terminal fold portion has a triangular protrusion. This allows the width of the terminal fold portion to be relatively large, improving workability when assembling the resin hook of the trim cover to the terminal fold portion of the seatback frame while reducing gaps and improving appearance quality. However, there is a problem in that the resin hook easily comes off the terminal fold portion when an in-plane force is applied to the trim cover.

[0005] In view of these problems, the object of the present invention is to provide a trim cover terminal fixing structure that can attach the terminal of the trim cover to the outer peripheral edge of the backboard that covers the back of the seat back with good appearance quality and that is less likely to come off. [Means for solving the problem]

[0006] The first invention of the present invention is a terminal fixing structure for a trim cover of a vehicle seat, the seat back having a trim cover that covers the surface of a pad that is a cushioning material, and a backboard that covers the back surface, the terminal portion of the trim cover has a resin hook with a substantially J-shaped cross section attached, the resin hook has a substantially strip-shaped base portion, a folded portion that extends opposite to the base portion, and a connecting portion that connects one end of the base portion in the width direction to the folded portion, the portion of the base portion that does not face the folded portion has a first thin portion that extends parallel to the one end, and a second thin portion that extends parallel to the one end on the other end side of the first thin portion, The terminal portion of the rim cover is connected to the base portion between the second thin portion and the other end, and the peripheral terminal portion of the backboard is formed with a hook portion that can be inserted into the space between the base portion and the folded portion of the plastic hook, and a roughly U-shaped groove portion that extends parallel to the peripheral terminal portion and is located inward in the in-plane direction from the hook portion, with the cross section of the base portion being bent between the first thin portion and the second thin portion and inserted and positioned in the groove portion, thereby attaching the terminal portion of the trim cover to the backboard.

[0007] According to the first aspect of the present invention, the resin hook is arranged in the groove with the hook portion inserted into the space between the base portion and the folded portion of the backboard, and with a portion of the base portion bent between the first thin-walled portion and the second thin-walled portion. At this time, movement of the resin hook toward the other end of the backboard is stopped by the connecting portion abutting against the end of the hook portion, and movement toward the one end is stopped by the portion of the base portion bent between the first thin-walled portion and the second thin-walled portion abutting against the wall of the groove. This allows the resin hook to be firmly attached to the backboard with a high-quality appearance.

[0008] A second invention of the present invention is characterized in that, in the above-mentioned first invention, when the base portion is bent at the first thin-walled portion and the second thin-walled portion and inserted into the groove portion, the dimension of the first portion between the first thin-walled portion and the second thin-walled portion in a direction perpendicular to the first thin-walled portion is set longer than the dimension of the second portion between the second thin-walled portion and the other end portion in a direction perpendicular to the first thin-walled portion and the width dimension of the opening of the groove portion, and the first portion is arranged in abutment against the wall surface of the groove portion facing outward from the seat.

[0009] According to the second aspect of the present invention, the dimension of the first portion in the direction perpendicular to the first thin-walled portion is set longer than the dimension of the second portion in the direction perpendicular to the first thin-walled portion and the width dimension of the opening of the groove, and the first portion is arranged in contact with the wall surface of the groove facing outward from the seat. This makes it more difficult for the resin hook to come off the groove of the backboard when a force is applied toward one end.

[0010] The third invention of the present invention is characterized in that, in the second invention, a standing wall portion is formed on the surface of the first portion opposite the folded portion, extending from the vicinity of the first thin-walled portion in the opposite direction to the folded portion, and the angle formed by the standing wall portion and the first portion is such that, when the first portion is placed in contact with the wall surface, the standing wall portion is approximately flush with the portion of the base portion facing the folded portion.

[0011] According to the third aspect of the present invention, when the base plate is bent at the first thin-walled portion and the second thin-walled portion and inserted into the groove, the upright wall portion is simply pressed, which allows the resin hook to be attached to the backboard with good workability. Furthermore, when the first and second portions of the base plate are placed in the groove, the upright wall portion closes the opening of the groove, improving the appearance quality.

[0012] A fourth aspect of the present invention is characterized in that, in the second aspect, the terminal portion of the trim cover is attached to a surface of the second portion of the resin hook on the folded-back portion side.

[0013] According to the fourth invention, when the base portion is bent between the first thin-walled portion and the second thin-walled portion and inserted into the groove portion, the trim cover is positioned to cover from the outside the vertical wall portion that is positioned to block the opening of the groove portion, so that the resin hook is more firmly attached to the backboard and the appearance quality is also improved. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of an automobile seat to which a trim cover terminal fixing structure according to an embodiment of the present invention is applied, as viewed obliquely from the rear. [Figure 2] FIG. 2 is a cross-sectional view taken along the line II-II of FIG. [Figure 3] FIG. 2 is a perspective view of the resin hook of the embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing a state in which a trim cover is attached to the resin hook of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] A trim cover terminal fixing structure according to one embodiment of the present invention will be described with reference to Figures 1 to 4. In the following description, directions will be described based on the up-down, front-rear, left-right directions shown in each drawing. Here, the up-down, front-rear, left-right directions are determined based on the automobile seat 1 when the automobile seat 1 is attached to the floor F. Here, the automobile seat 1 corresponds to the "vehicle seat" in the claims.

[0016] As shown in FIG. 1, an automobile seat 1 has a seat cushion 2 that supports the buttocks and thighs of a seated occupant, and a seat back 3 that supports the waist and back of the seated occupant.

[0017] The seat cushion 2 is fixed to the floor F. The lower end of the seat back 3 is connected to the rear end of the seat cushion 2 so that the tilt angle can be adjusted.

[0018] As shown in Figure 1, the seat back 3 has a frame 4 that forms the skeleton, a pad 5 that is a cushioning material that is placed over the frame 4, a trim cover 6 that is a skin material that covers the surface of the pad 5, and a backboard 7 that covers the back.

[0019] The trim cover 6 is made by sewing together multiple pieces cut from fabric, leather, etc. into a bag-like shape that opens toward the rear. As shown in Figure 2, a resin hook 8 made of soft resin is attached to the opening end of the trim cover 6. Note that while Figure 2 shows the left opening end, the upper opening end and the right opening end have similar cross-sectional configurations. Hereinafter, the configuration of the left opening end will be described as a representative example.

[0020] As shown in Figures 2 to 4, the resin hook 8 has a roughly band-shaped base plate portion 9 with its longitudinal axis extending in the vertical direction, a folded portion 10 extending in the vertical direction opposite the base plate portion 9, and a connecting portion 11 connecting the left end portion, which is one end of the base plate portion 9, to the left end portion, which is one end of the folded portion 10.

[0021] The base plate 9 has a first thin-walled portion 12, a second thin-walled portion 13, and a third thin-walled portion 14. The first thin-walled portion 12, the second thin-walled portion 13, and the third thin-walled portion 14 all extend vertically parallel to the left end portion. The portion between the left end portion and the first thin-walled portion 12 is a hook portion 15, the portion between the first thin-walled portion 12 and the second thin-walled portion 13 is a first portion 16, and the portion between the second thin-walled portion 13 and the right end portion is a second portion 17. The left-right dimensions of the hook portion 15 and the second portion 17 are approximately the same and are set to approximately two-thirds the left-right dimension of the first portion 16. The first thin-walled portion 12 has a generally V-shaped cross section that opens forward, while the second thin-walled portion 13 and the third thin-walled portion 14 have generally U-shaped cross sections that open rearward. The front-rear thickness of the bottom 13a of the second thin-walled portion 13 opposite the opening side is set smaller than the front-rear thickness of the bottom 14a of the third thin-walled portion 14 opposite the opening side. The front-rear thickness of the bottom 14a is approximately half the front-rear thickness of the second portion 17. The first thin-walled portion 12 functions as an integral hinge when the first portion 16 is bent forward relative to the hook portion 15. The second thin-walled portion 13 functions as an integral hinge when the second portion 17 is bent rearward relative to the first portion 16. The third thin-walled portion 14 functions to weaken the third thin-walled portion 14 and facilitate sewing when the end of the trim cover 6 is sewn to the second portion 17 with sewing thread 18. A standing wall portion 19 extending from the right end of the first thin-walled portion 12 toward the right rear is formed on the rear surface of the first portion 16 of the base plate 9. Details of the standing wall portion 19 will be described later. Here, the hook portion 15 corresponds to the "portion facing the folded portion of the base portion" in the claims.

[0022] As shown in Figures 2 to 4, the folded portion 10 is a portion that faces the hook portion 15 of the base portion 9. The left end side is connected to the left end side of the hook portion 15 by a connecting portion 11, and a protrusion 10a that protrudes rearward (toward the hook portion 15) is formed on the rear surface of the right end side (the surface on the hook portion 15 side). When the hook portion 20 of the backboard 7 is inserted between the folded portion 10 and the hook portion 15, the protrusion 10a strongly hits the hook portion 20, thereby more firmly fixing the folded portion 10 to the hook portion 20.

[0023] As shown in FIGS. 1 and 2, the backboard 7 is a resin-molded body having a generally rectangular plate shape with its longitudinal axis extending vertically when viewed from the rear. A rectangular recess 7a is formed in the center, opening toward the rear. A flat plate-shaped hook portion 20 extending leftward is formed at the left end. Similarly, a flat plate-shaped hook portion 20 extending rightward is formed at the right end, and a flat plate-shaped hook portion 20 extending upward is formed at the upper end. The upper left and right hook portions 20 are smoothly connected. A generally U-shaped groove portion 21, whose cross section opens toward the rear, is smoothly connected to the inside of the seat from the upper left and right hook portions 20. The groove portion 21 has an outer wall surface 21a, which is the wall surface facing the outside of the seat, and an inner wall surface 21b, which is the wall surface facing the inside of the seat. An opening 21c is formed between the rear end of the outer wall surface 21a and the rear end of the inner wall surface 21b. 2, the left-right dimension of opening 21c (groove width dimension) is set smaller than the front-rear dimension from opening 21c to the groove bottom (groove depth dimension). Here, outer wall surface 21a corresponds to the "wall surface" in the claims.

[0024] The procedure for attaching the plastic hook 8 connected to the trim cover 6 to the backboard 7 will be described. First, as shown in FIG. 4, the terminal portion of the trim cover 6 is connected by sewing to the second portion 17 of the plastic hook 8 with the sewing thread 18. At this time, with the rear side (back side) of the terminal portion of the trim cover 6 abutting against the front side of the second portion 17, the terminal portion of the trim cover 6 and the third thin-walled portion 14 are sewn together with the sewing thread 18. Next, as shown in FIG. 2, the hook portion 20 of the backboard 7 is inserted between the folded portion 10 and the hook portion 15 of the plastic hook 8. At this time, the rear side (the surface on the opening 21c side) of the hook portion 20 abuts against the front side (the surface facing the folded portion 10) of the hook portion 15. Next, the base portion 9 of the plastic hook 8 is bent at the first thin-walled portion 12 and the second thin-walled portion 13 so that the second thin-walled portion 13 faces forward. Specifically, in the first thin-walled portion 12, the first portion 16 is bent forward relative to the hook portion 15, and in the second thin-walled portion 13, the second portion 17 is bent rearward relative to the first portion 16. Then, by pressing the standing wall portion 19 forward via the trim cover 6, the first portion 16 and the second portion 17 are inserted into the recessed groove portion 21, and the first portion 16 is brought into contact with the outer wall surface 21a. This causes the standing wall portion 19 to become substantially flush with the hook portion 15. That is, the angle between the standing wall portion 19 and the first portion 16 is set so that the first portion 16 is substantially flush with the hook portion 15 when the first portion 16 is brought into contact with the outer wall surface 21a. In other words, in FIG. 2, the angle between the standing wall portion 19 and the first portion 16 is set so that it is substantially equal to the angle formed by a line connecting the outer wall surface 21a and the left and right sides of the opening 21c. 2, the dimension of the standing wall portion 19 extending in the left-right direction is set to be smaller than the dimension obtained by subtracting the thickness dimension of the trim cover 6 from the dimension of a line connecting the left and right sides of the opening 21c.

[0025] The present embodiment configured as described above provides the following advantageous effects. The hook portion 20 of the resin hook 8 is inserted into the space between the folded portion 10 and the hook portion 15 of the base plate portion 9 on the backboard 7, and the base plate portion 9 is partially folded between the first thin-walled portion 12 and the second thin-walled portion 13 and is disposed in the recessed groove portion 21. At this time, movement of the resin hook 8 toward the inside of the seat relative to the backboard 7 is stopped by the connecting portion 11 abutting against the end of the hook portion 20, and movement toward the outside of the seat is stopped by the portion of the base plate portion 9 folded between the first thin-walled portion 12 and the second thin-walled portion 13 abutting against the outer wall surface 21a of the recessed groove portion 21. This allows the resin hook 8 to be firmly attached to the backboard 7 with a high-quality appearance.

[0026] Furthermore, the dimension of the first portion 16 in the direction perpendicular to the first thin-walled portion 12 is set to be longer than the dimension of the second portion 17 in the direction perpendicular to the first thin-walled portion 12 and the width dimension of the opening 21c of the recessed groove portion 21, and the first portion 16 is disposed in contact with the outer wall surface 21a of the recessed groove portion 21. This makes it more difficult for the resin hook 8 to come off the recessed groove portion 21 of the backboard 7 when a force is applied in the seat outer direction.

[0027] Furthermore, when the base plate portion 9 is bent at the first thin-walled portion 12 and the second thin-walled portion 13 and inserted into the recessed groove portion 21, it is only necessary to press the standing wall portion 19, so that the resin hook 8 can be attached to the backboard 7 with good workability. Also, when the first portion 16 and the second portion 17 of the base plate portion 9 are placed in the recessed groove portion 21, the standing wall portion 19 closes the opening 21c of the recessed groove portion 21, improving the appearance quality.

[0028] In addition, the terminal portion of the trim cover 6 is attached to the surface of the second portion 17 of the resin hook 8 on the side of the folded portion 10. As a result, when the base portion 9 is folded at the first thin portion 12 and the second thin portion 13 and inserted into the recessed groove portion 21, the trim cover 6 is arranged to cover from the outside the standing wall portion 19 that is arranged to close the opening 21c of the recessed groove portion 21, so that the resin hook 8 is attached more firmly to the backboard 7 and the appearance quality is also improved.

[0029] Although specific embodiments have been described above, the present invention is not limited to those external appearances and configurations, and various modifications, additions, and deletions are possible within the scope of the present invention. For example, the following can be mentioned.

[0030] 1. In the above embodiment, the ends of the trim cover 6 are fixed via the resin hooks 8 to the upper left and right ends of the backboard 7. However, this is not limiting, and the end of the trim cover 6 may be fixed via the resin hooks 8 to at least one of the upper, lower, left, or right ends of the backboard 7.

[0031] 2. In the above embodiment, the present invention is applied to an automobile seat 1, but it may also be applied to seats for airplanes, ships, railway vehicles, and the like. [Explanation of symbols]

[0032] 1. Automobile seats (vehicle seats) 3 Seat back 4 frames 5 Pad 6 Trim Cover 7 Backboard 8 Resin Hooks 9. Circuit board 10 Folded section 11 Connecting part 12 1st thin section 13 2nd thin section 15 Hook part (part facing the folded part of the board) 16 Part 1 17 Part 2 18 Sewing thread 19 Vertical wall 20 Hook 21 Groove 21a Exterior wall (wall) 21c aperture

Claims

1. A terminal fixing structure for a trim cover of a vehicle seat, The seat back has a trim cover that covers the surface of a pad that is a cushioning material, and a back board that covers the back surface, A resin hook having a substantially J-shaped cross section is attached to the end portion of the trim cover, The resin hook has a substantially strip-shaped base portion, a folded portion extending opposite to the base portion, and a connecting portion connecting one end of the base portion in the width direction to the folded portion. In the portion of the substrate that does not face the folded portion, a first thin-walled portion extending parallel to the one end and a second thin-walled portion extending parallel to the one end on the other end side of the first thin-walled portion are formed. an end portion of the trim cover is coupled to the base portion between the second thin portion and the other end portion; The outer peripheral end portion of the backboard is formed with a hook portion that can be inserted into the space between the base portion and the folded portion of the resin hook, and a substantially U-shaped groove portion that extends inward in the in-plane direction from the hook portion and parallel to the outer peripheral end portion, having an opening with a cross-section facing rearward. A terminal fixing structure for a trim cover of a vehicle seat, in which the hook portion is inserted into the space between the base portion and the folded portion of the resin hook, and the base portion is bent at the first thin portion and the second thin portion and inserted and positioned into the groove portion, thereby attaching the terminal portion of the trim cover to the backboard.

2. In claim 1, When the base portion is bent at the first thin-walled portion and the second thin-walled portion and inserted into the groove portion, the dimension of the first portion, which is the portion between the first thin-walled portion and the second thin-walled portion, in a direction perpendicular to the first thin-walled portion is set longer than the dimension of the second portion, which is the portion between the second thin-walled portion and the other end, in a direction perpendicular to the first thin-walled portion and the width dimension of the opening of the groove portion, and the first portion is arranged in contact with the wall surface of the groove portion facing toward the outside of the seat.

3. In claim 2 a standing wall portion extending from a vicinity of the first thin portion in a direction opposite to the folded portion is formed on a surface of the first portion opposite to the folded portion, The angle between the vertical wall portion and the first portion is such that, when the first portion is positioned in contact with the wall surface, the vertical wall portion is substantially flush with the portion of the base plate portion that faces the folded portion, in a terminal fixing structure for a trim cover of a vehicle seat.

4. In claim 2 The end portion of the trim cover is attached to a surface of the second portion of the resin hook on the side of the folded-back portion.

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