Seat back

Abstract

To provide a seat back in which it is difficult for a gap to be formed at a mating portion between a board peripheral edge portion of a back board and a back cover.SOLUTION: A seat back 1 includes a cushion body 2 that elastically supports a seated person, a back frame 5 that supports the cushion body 2 from a rear side of a seat, and a back board 6 that is attached to the back frame 5 from the rear side of the seat. The cushion body 2 is configured to be divided into three divided elements, namely a central top plate main 3 and top plate sides 4 on both sides. Each top plate side 4 includes a side pad 4A, a side base material 4B provided on a rear face of the pad, and a side cover 4C that is pulled in so as to cover the side pad 4A from a front side of the seat and at the same time to fix a cover terminal C1 at the periphery to a concave part B1 on a base-material rear side of the side base material 4B. A board peripheral edge portion 6A of the back board 6 serves as an insertion portion that is inserted into the concave part B1 from the rear side of the seat by extending in a manner to bend toward the front side of the seat.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a seat back, and more particularly to a seat back having a back board attached to a back frame from the rear side of the seat. [Background technology]

[0002] Patent Document 1 discloses a configuration in which a backboard is provided on the underside of a seatback. The backboard is attached to a back frame from the rear side of the seat. The peripheral edge of the backboard is attached to the rear side of the seat against the end of the back cover that covers the surface of the seatback, which is pulled into the rear side of the seat. This closes the gap between the peripheral edge of the backboard and the back cover. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-74625 Summary of the Invention [Problem to be solved by the invention]

[0004] As in the configuration described in Patent Document 1, when the peripheral edge of the backboard is simply in contact with the back cover, a gap is likely to form between the two due to bending of either one. Therefore, the present invention provides a seat back that is less likely to form a gap at the joint between the peripheral edge of the backboard and the back cover. [Means for solving the problem]

[0005] To solve the above problems, the seat back of the present invention employs the following means.

[0006] That is, the first invention of the present invention is a seat back having a cushion body that elastically supports a seat occupant, a back frame that supports the cushion body from the back side of the seat, and a back board attached to the back frame from the back side of the seat, wherein the cushion body is divided into three separate elements: a main top board that forms the central part in the seat width direction, and each top board side that forms both side parts in the seat width direction, and each top board side has a side pad that forms a seat pad, a side base material provided on the back surface of the side pad, and a side cover that covers the side pad from the front side of the seat and has a peripheral cover terminal that is pulled in to be fixed into a recess formed in the side base material that is recessed from the back side of the seat, and the board peripheral portion of the back board extends so as to bend toward the front side of the seat and serves as an insertion portion that is inserted into the recess from the back side of the seat.

[0007] According to the first aspect of the present invention, even if there is a discrepancy in the insertion depth of the board peripheral edge into the recess, the board peripheral edge can maintain its mating state with the adjacent cover terminal. Therefore, gaps are less likely to form at the mating portion between the board peripheral edge and the side cover. This configuration can be rationally achieved by utilizing the configuration of the recess formed in each side base material to secure the cover terminal.

[0008] The second invention of the present invention is a seat back according to the first invention, wherein the cover terminal is fixed to the recess so as to have a gap in the seat width direction through which the peripheral portion of the board can be inserted from the back side of the seat, and the peripheral portion of the board is inserted into the gap so as to be aligned with the cover terminal in the seat width direction.

[0009] According to the second aspect of the present invention, the peripheral edge of the board can be inserted into the recess without interfering with the cover terminal, thereby enabling the peripheral edge of the board and the adjacent cover terminal to be more appropriately aligned.

[0010] The third invention of the present invention is a seat back according to the second invention, wherein the cover terminal has a plate-shaped locking plate extending along the cover terminal, and the locking plate is fixed to form the gap in the recess against the tension of the side cover by contacting a rib protruding into the recess from the deepest part of the inner wall of the recess and by catching on a rib protruding into the recess from the wall entrance part of the outer wall.

[0011] According to the third aspect of the present invention, the cover terminal can be fixed in a state where it is held in position within the recess so as to ensure an appropriate gap for inserting the board peripheral portion, thereby enabling the board peripheral portion and the cover terminal to be more appropriately aligned.

[0012] The fourth invention of the present invention is a seat back according to the third invention, wherein the rib protrudes inwardly from the wall entrance side of the inner wall toward the back side of the wall in an inclined manner so as to gradually move the locking plate toward the outer wall as the locking plate is inserted.

[0013] According to the fourth aspect of the present invention, by inserting the locking plate into the recess, the ribs can move it toward the outer wall of the recess, ensuring a gap into which the board's peripheral edge can be inserted. In addition, the ribs can guide the board's peripheral edge inserted into the recess so that it approaches the locking plate. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view illustrating a schematic configuration of a seat back according to a first embodiment. [Figure 2] This is an exploded perspective view with the backboard removed to the rear. [Figure 3] FIG. 2 is a partial rear view of the seat back with the backboard removed. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. [Figure 5] FIG. 10 is a partial rear view of the seat back with the backboard attached. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] FIG. 7 is an enlarged view of part VII in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0016] First Embodiment (Outline of seat back 1) First, the configuration of a seat back 1 according to a first embodiment of the present invention will be described with reference to Figures 1 to 7. In the following description, when directions such as front, back, up, down, left, and right are indicated, they refer to the directions shown in each figure.

[0017] Furthermore, when a direction, such as the "seat width direction," is indicated with the word "seat," it refers to the respective direction relative to the seat back 1. Furthermore, in the following description, when a specific reference drawing is not shown or when there is no reference symbol corresponding to the reference drawing, any of Figures 1 to 7 will be referred to as appropriate.

[0018] As shown in Fig. 1, the seat back 1 according to this embodiment is configured as a backrest portion of an automobile seat. The seat back 1 has a cushion body 2 that elastically supports the back of a seated occupant, and a metal back frame 5 that supports the cushion body 2 from the rear side (back side) of the seat. The seat back 1 also has a resin backboard 6 that covers the rear surface of the seat back 1.

[0019] The cushion body 2 is configured to be divided into three divided elements: a main top plate 3 that forms the center portion in the seat width direction, and each side top plate 4 that forms both side portions in the seat width direction. By dividing the cushion body 2 in this way, parts can be replaced according to the specifications for each divided element.

[0020] The main top panel 3 and each side top panel 4 are individually assembled to the back frame 5 from the seat surface (front side). As shown in Figs. 2 to 4, each side top panel 4 has a side pad 4A made of urethane foam and a side base material 4B made of resin that is assembled so as to contact the back side of the side pad 4A.

[0021] Each side table top 4 also has a fabric side cover 4C that covers the side pad 4A. The side cover 4C is placed over the side pad 4A from the front side (the pad surface). The cover terminals of the side cover 4C, which form the periphery of the top, bottom, left, and right sides, are pulled into the back side (rear side) of the side base material 4B and fixed to the periphery of the base material.

[0022] As a result, the side cover 4C is integrated with the side base material 4B so as to enclose the side pad 4A between the side cover 4C and the side base material 4B. As a result, the side base material 4B is fixed in a state of being in contact with the back surface of the side pad 4A via the side cover 4C.

[0023] Each of the top side panels 4 is assembled to the back frame 5 with the side pads 4A, side base materials 4B, and side covers 4C assembled as a single unit as described above. Specifically, each of the top side panels 4 is set so that its side base materials 4B are in contact with the back frame 5 from the seat front side, and the top side panels 4 are fastened together with clips and bolts (not shown).

[0024] In each side top panel 4, the cover terminal C1 forming the outer peripheral edge of the side cover 4C in the seat width direction is fixed to a recess B1 formed along the peripheral edge of the side base material 4B and recessed from the back side of the base material via a vertically elongated resin locking plate C2 sewn along the peripheral edge. The recess B1 is formed to extend along the outer peripheral edge of the base material 4B in the seat width direction.

[0025] The locking plate C2 is formed in a vertically long plate shape with a uniform cross section extending along the cover end C1. As shown in Fig. 4, the locking plate C2 is inserted into the recess B1 from the rear side of the seat, and is fixed in the recess B1 against the tension of the side cover 4C so as not to come off.

[0026] Specifically, the edge of the locking plate C2 opposite to the edge of the base end sewn to the cover terminal C1 (free end) is inserted into the recess B1 from the back side of the seat, whereby the locking plate C2 is abutted against the rib B2 protruding from the right inner wall of the recess B1 and is inserted into the back of the recess B1 while being guided along the rib B2 so as to approach the left outer wall.

[0027] The rib B2 is shaped so that its protrusion into the recess increases at an angle from the wall entrance side (rear side) of the inner wall of the recess B1 toward the back side (front side). The rib B2 is formed at multiple locations in the height direction on the right inner wall.

[0028] When the locking plate C2 is inserted into the recess B1, a concave notch C3 formed on the left side surface of the edge on the base end side of the plate fits into a triangular protrusion B3 that protrudes into the recess from the wall inlet (rear) of the left outer wall of the recess B1 (see FIG. 7). In other words, because the locking plate C2 is subjected to tension from the side cover 4C, the edge on the base end side is subjected to a force that presses it against the left outer wall of the recess B1.

[0029] Therefore, due to the tension of the side cover 4C, the edge of the locking plate C2 that is inserted is brought into contact with the rib B2 from the left side, and the notch C3 at the base end is hooked onto the rib B3 of the recess B1. As a result, the locking plate C2 is fixed to the recess B1 with a gap T formed in the seat width direction between it and the right inner wall of the recess B1.

[0030] 2 and 5 to 6, the backboard 6 is attached to the back frame 5 from the rear side of the seat. Specifically, the backboard 6 is attached integrally to the back frame 5 by inserting clips (not shown) attached to multiple locations on the front part of the backboard 6 into the back frame 5 from the rear side of the seat.

[0031] The multiple clips (not shown) are attached to an intermediate portion of the board closer to the center, rather than to the board peripheral portion 6A of the backboard 6. Therefore, the board peripheral portion 6A of the backboard 6 is spaced apart from the assembly points of the multiple clips (not shown).

[0032] Specifically, the left and right board peripheral portions 6A of the backboard 6 extend away from the assembly points with multiple clips (not shown) in the seat width direction and are shaped to bend toward the seat surface (front side) from the middle. Therefore, the left and right board peripheral portions 6A of the backboard 6 are relatively easy to bend when subjected to external force.

[0033] The reason for this is that the left and right board peripheral portions 6A are spaced apart from the locations where the backboard 6 is attached to the back frame 5 by a plurality of clips (not shown). However, these left and right board peripheral portions 6A are inserted into the recesses B1 formed in the side base materials 4B of each of the table top side panels 4 described above when the backboard 6 is attached to the back frame 5.

[0034] 7, specifically, each board peripheral portion 6A is inserted into a gap T formed in the recess B1 of the corresponding side base material 4B between the locking plate C2 and the right inner wall of the recess B1. As a result, each board peripheral portion 6A fits into the recess B1, and is set in a mated state with the adjacent side cover 4C as if they were connected.

[0035] Specifically, the peripheral edge 6A of each board is guided toward the cover terminal C1 connected to the locking plate C2 by contacting the rib B2 formed on the inner wall of each recess B1. As a result, the peripheral edge 6A of each board can be brought toward the cover terminal C1 of the adjacent side cover 4C, thereby narrowing the gap between them. Even if there is a discrepancy in the insertion depth of the peripheral edge 6A of each board into the recess B1, it can maintain its mating state with the cover terminal C1 of the side cover 4C.

[0036] To summarize the above, the seat back 1 according to this embodiment has the following configuration: Note that the reference numerals in parentheses below correspond to the respective components shown in the above embodiment.

[0037] That is, the seat back (1) has a cushion body (2) that elastically supports the seat occupant, a back frame (5) that supports the cushion body (2) from the rear side of the seat, and a back board (6) that is attached to the back frame (5) from the rear side of the seat. The cushion body (2) is configured to be divided into three divided elements: a main top plate (3) that forms the center part in the seat width direction, and side top plates (4) that form both side parts in the seat width direction.

[0038] Each tabletop side (4) has a side pad (4A) that forms a seat pad and a side base material (4B) attached to the back surface of the side pad (4A). Each tabletop side (4) also has a side cover (4C) that covers the side pad (4A) from the front side of the seat and has a peripheral cover terminal (C1) that is retracted so as to be fixed into a recess (B1) formed in the side base material (4B) that is recessed from the back side of the seat. The board peripheral portion (6A) of the backboard (6) extends so as to bend toward the front side of the seat and serves as an insertion portion that is inserted into the recess (B1) from the back side of the seat.

[0039] According to the above configuration, even if there is a discrepancy in the insertion depth of the board peripheral portion 6A relative to the recessed portion B1, the board peripheral portion 6A can maintain its mating state with the adjacent cover end C1. Therefore, gaps are less likely to form at the mating portion between the board peripheral portion 6A and the side cover 4C. This configuration can be rationally achieved by utilizing the configuration of the recessed portion B1 formed in each side base material 4B to secure the cover end C1.

[0040] Furthermore, the cover end (C1) is fixed to the recess (B1) so as to provide a gap (T) in the sheet width direction that allows the board peripheral portion (6A) to be inserted from the back side of the sheet. The board peripheral portion (6A) is inserted into the gap (T) so as to be aligned with the cover end (C1) in the sheet width direction. With this configuration, the board peripheral portion (6A) can be inserted into the recess (B1) without interfering with the cover end (C1). As a result, the board peripheral portion (6A) and the adjacent cover end (C1) can be more appropriately aligned.

[0041] The cover terminal (C1) also has a plate-shaped locking plate (C2) extending along the cover terminal (C1). The locking plate (C2) is fixed to the recess (B1) against the tension of the side cover (4C) by contacting a rib (B2) protruding into the recess from the deepest part of the inner wall of the recess (B1) and by engaging with a barb (B3) protruding into the recess from the wall inlet part of the outer wall. This configuration allows the cover terminal (C1) to be fixed in the recess (B1) in a state where it is held in position so as to properly secure the gap (T) for inserting the board peripheral portion (6A). As a result, the board peripheral portion (6A) and the cover terminal (C1) can be more properly aligned.

[0042] Furthermore, the rib (B2) slopes upward from the wall entrance side of the inner wall toward the back of the wall so that the locking plate (C2) gradually moves toward the outer wall as it is inserted. According to the above configuration, by inserting the locking plate (C2) into the recess (B1), the rib (B2) moves it toward the outer wall of the recess (B1), ensuring a gap (T) into which the board peripheral portion (6A) can be inserted. Furthermore, the rib (B2) can guide the board peripheral portion (6A) inserted into the recess (B1) so that it approaches the locking plate (C2).

[0043] Other Embodiments Although one embodiment of the present invention has been described above, the present invention can be embodied in various forms other than the above embodiment.

[0044] 1. The seat back of the present invention is applicable to seats installed in vehicles such as automobiles and trains, as well as seats installed in vehicles other than vehicles such as airplanes and ships. The seat back is also applicable to seats other than vehicles.

[0045] 2. The means for attaching the backboard to the back frame may be other means such as hooks or screws in addition to clips.

[0046] 3. The side base material of each table top side may be made of metal in addition to resin. Each table top side may be attached to the back frame by the side base material, or may be attached to the back frame by hooking the cover terminals of the side covers. In other words, the side covers may be attached to the back frame by fixing some of their cover terminals in recesses in the side base material and hooking the other cover terminals on the back frame.

[0047] The structure for fixing the cover terminal of the side cover to the recess of the side base material is not limited to fixing using a locking plate. For example, the cover terminal may be fixed to the recess by hooking a resin hook sewn to the cover terminal into a hook hole formed in the recess of the side base material.

[0048] Alternatively, a hook may be provided in the recess of the side base material, and a slit formed in the cover end may be hooked onto this hook to secure the cover in place. Alternatively, the cover end may be glued to the recess of the side base material to secure the cover in place. The side cover may be made of fabric or leather, such as synthetic leather or natural leather.

[0049] The recesses of the side substrate may be formed in the substrate peripheral portion of the side substrate, or may be formed in the intermediate portion away from the substrate peripheral portion. [Explanation of symbols]

[0050] 1 seat back 2 cushion body 3 Main top 4 Top side 4A Side Pad 4B Side Base Material B1 recess B2 Rib B3 Return 4C side cover C1 Cover Terminal C2 Locking Plate C3 notch 5 Back Frame 6 Backboard 6A Board edge T-gap

Claims

1. A seat back having a cushion body that elastically supports a seated occupant, a back frame that supports the cushion body from the back side of the seat, and a back board that is attached to the back frame from the back side of the seat, The cushion body is divided into three divided elements: a main top plate forming a central portion in the seat width direction, and side top plates forming both side portions in the seat width direction; Each of the top panel sides has a side pad forming a seat pad, a side base material provided on the back surface of the side pad, and a side cover that covers the side pad from the front side of the seat and has a peripheral cover terminal that is retracted so as to be fixed into a recess formed in the side base material and recessed from the back side of the seat, The seat back has a board peripheral portion of the backboard that extends in a curved manner toward the seat surface and serves as an insertion portion that is inserted into the recess from the back side of the seat.

2. 2. The seat back according to claim 1, The cover terminal is fixed to the recess so as to have a gap in the sheet width direction that allows the board peripheral portion to be inserted from the back side of the sheet, The seat back is inserted into the gap so that the peripheral edge of the board is aligned with the cover end in the seat width direction.

3. 3. The seat back according to claim 2, The cover terminal has a plate-shaped locking plate extending along the cover terminal, and the locking plate is fixed to the recess against the tension of the side cover by contacting a rib that protrudes into the recess from the deepest part of the inner wall of the recess and by catching on a rib that protrudes into the recess from the wall entrance part of the outer wall.

4. 4. The seat back according to claim 3, The rib protrudes into the recess of the inner wall from the wall entrance side toward the back side of the wall in a sloping manner so that the rib gradually approaches the outer wall as the locking plate is inserted.

Images