Cushion body

Abstract

The present invention provides a cushion body capable of appropriately reducing a press-in load for fixing an end of a seat cover to a cushion back surface of a seat cushion. The cushion body (1) is provided with a seat cushion (2) and a seat cover (3) covering the seat cushion (2), and the cushion body (1) is provided with a locking groove (2A) formed on the cushion back surface of the seat cushion (2); and a stopper (4) that is sewed to the end (3A) of the seat cover (3) and is press-fitted into the stopper groove (2A). The groove wall of the locking groove (2A) has: a convex groove wall (A1) protruding so as to form a press-in surface of the locking member (4); and concave groove walls (A2) which are arranged in the groove length direction with the convex groove walls (A1) and which are recessed so as not to come into contact with the fasteners (4).

Description

Technical Field

[0001] The present invention relates to a seat cushion body, and more particularly, to a seat cushion body including a seat pad and a seat cover covering the seat pad. Background Art

[0002] Patent Document 1 discloses a structure for securing the end of a seat cover to the hardened back surface of a seat cushion. Specifically, an arrow-shaped barbed fastener is sewn onto the end of the seat cover. The seat cover is secured to the back surface of the seat cushion by press-fitting the fastener into a securing groove formed on the back surface of the seat cushion. Patent Literature

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2015-2780. Summary of the Invention Problems to be solved by the invention

[0004] In the structure described in Patent Document 1, the fastener is a long strip extending along the distal end of the seat cover, resulting in a problem in that the press-fit load into the fastening groove is increased. Therefore, the present invention provides a seat cushion body that can appropriately reduce the press-fit load for fastening the distal end of the seat cover to the back surface of the seat pad. Means for solving problems

[0005] As a means for solving the above-mentioned problems, the seat cushion body of the present invention adopts the following means.

[0006] That is, the first technical solution of the present invention is a seat cushion body having a seat cushion and a seat cover covering the seat cushion, the seat cushion body having: a fixing groove formed on the back side of the cushion of the seat cushion; and a fixing piece sewn to the end of the seat cover and pressed into the fixing groove, the groove wall of the fixing groove having: a convex groove wall protruding in a manner forming a pressing surface of the fixing piece; and a concave groove wall arranged in the groove length direction with the convex groove wall and recessed in a manner to avoid abutting against the fixing piece.

[0007] According to the first aspect, when the stopper is pressed into the stopper groove, the stopper can be pressed only against the convex groove wall without contacting the concave groove wall. As a result, the contact area of ​​the stopper with the groove wall can be reduced, and the press-fitting load can be reduced.

[0008] The second technical solution of the present invention is based on the above-mentioned first technical solution, in which a plurality of convex groove walls are provided in the longitudinal direction of the groove.

[0009] According to the second technical solution, the stopper can abut against the convex groove wall at multiple locations in the groove length direction. As a result, the stopper can abut against the convex groove wall without tilting in the stopper groove, which can appropriately improve assembly and post-assembly retention.

[0010] The third technical solution of the present invention is based on the above-mentioned first technical solution or the second technical solution, and the convex groove wall is provided on the two groove walls of the fixing groove.

[0011] According to the third aspect, the stopper can be brought into partial contact with each groove wall, thereby more appropriately reducing the pressing load of the stopper.

[0012] The fourth technical solution of the present invention is based on the above-mentioned third technical solution, and the convex groove wall is arranged at the opposite position of the two groove walls.

[0013] According to the fourth aspect, the fastener can be held in a sandwiched manner by the convex groove walls located at opposing positions of the two groove walls.

[0014] A fifth technical solution of the present invention is based on the third technical solution, wherein the convex groove walls provided on the two groove walls are arranged so as not to overlap each other in the longitudinal direction of the groove.

[0015] According to the fifth aspect, since the protruding groove walls do not face each other, a large space into which the stopper can be pressed can be ensured between each protruding groove wall and the other groove wall, thereby improving the assembly efficiency of the stopper.

[0016] The sixth technical solution of the present invention is based on the above-mentioned first technical solution or second technical solution. The cross-sectional width of the fixing piece pressed into the fixing groove is greater than the minimum groove width that can be pressed into the fixing groove due to the protrusion of the convex groove wall, and is smaller than the maximum groove width that is widened due to the depression of the groove wall.

[0017] According to the sixth aspect, the amount of engagement of the stopper with respect to the convex groove wall can be appropriately ensured, and contact with the concave groove wall can be appropriately avoided, thereby reducing the press-fitting load.

[0018] According to a seventh aspect of the present invention, in addition to the sixth aspect, the fixing member includes a plurality of arrow-shaped barbs in a press-fitting direction that are hooked on the convex groove wall when pressed into the fixing groove.

[0019] According to the seventh aspect, the pressing load of the fastener can be reduced, and the fastener can be fixed to the fastening groove in a state where it is appropriately prevented from coming off. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a perspective view showing a schematic structure of a seat cushion body according to the first embodiment. Figure 2 This is a perspective view showing a state before the fixing member is pressed into the fixing groove. Figure 3 This is a bottom view of the retaining groove as viewed from the back side of the liner. Figure 4 The state in which the fixing member is pressed into the fixing groove is shown. Figure 3 Corresponding bottom view. Figure 5 yes Figure 4 VV line cross-sectional view. Figure 6 It is a bottom view showing a schematic structure of a seat cushion body according to the second embodiment. Figure 7 It is a bottom view showing a schematic structure of a seat cushion body according to a third embodiment. Figure 8 It is a bottom view showing a schematic structure of a seat cushion body according to a fourth embodiment. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present invention will be described using the accompanying drawings.

[0022] First Implementation Method (Schematic Structure of Cushion Body 1) First, use Figures 1 to 5 The structure of the seat cushion body 1 according to the first embodiment of the present invention will be described. In the following description, when directions such as front, back, top, bottom, left, and right are indicated, these directions are referred to in the respective drawings. In the following description, when no specific reference drawings are indicated or when there are no corresponding symbols in the reference drawings, reference will be made to the respective drawings as appropriate. Figures 1 to 5 Any of the graphs in .

[0023] like Figure 1~Figure 2 As shown, the seat cushion body 1 according to this embodiment is suitable for use as a seat cushion constituting a seating portion of a vehicle seat. The seat cushion body 1 includes a seat pad 2 made of a foamed resin material and a seat cover 3 made of fabric covering the seat pad 2.

[0024] The seat cover 3 covers the seat pad 2 from the pad surface side. And each end 3A of the seat cover 3 is pulled toward the pad back side and fixed to the corresponding fixing groove 2A formed on the pad back side of the seat pad 2. Figure 1~Figure 2 This is a diagram showing the seat pad 2 as viewed from the back side of the pad.

[0025] The seat pad 2 has a surface portion that supports the buttocks and thighs of the seated person and is made of polyurethane foam, whereas the back portion of the seat pad 2 that forms the back of the seat pad is made of polypropylene foam, which is harder than polyurethane foam.

[0026] The seat pad 2 can support the buttocks and thighs of the seat occupant flexibly at its soft pad surface portion by being made into such a structure. In addition, the seat pad 2 widely disperses and bears the load applied by the seat occupant at its hard pad back portion.

[0027] The seat pad 2 has a hard back surface with uneven shapes (not shown) formed thereon to prevent the seat occupant's buttocks from sliding forward as they sink during a vehicle collision, a phenomenon known as "sinking." The retaining groove 2A is formed to extend like a rib on the back surface of the hard pad.

[0028] like Figure 2 As shown, each end 3A of the seat cover 3 is fixed by sewing a resin fixing piece 4 into the corresponding fixing groove 2A from the back side of the cushion. Each fixing piece 4 is composed of a plate-shaped member extending along each end 3A of the seat cover 3.

[0029] In detail, each fixing member 4 is composed of a plate-like member with a T-shaped cross-section, which has: a long plate-like sewing portion 4A, which abuts and is sewn to each end 3A of the seat cover 3; and a long plate-like pressing portion 4B, which extends in a manner upright from the center of the sewing portion 4A and is pressed into each fixing groove 2A.

[0030] Arrow-shaped barbs B1 are formed at the front and middle portions of the press-fit portion 4B to ensure proper engagement with each retaining groove 2A after insertion. Each barb B1 extends symmetrically and obliquely from the press-fit portion 4B in all directions, hooking onto the two walls of each retaining groove 2A. Each barb B1 extends from the press-fit portion 4B in an identical shape. Each retaining member 4 is constructed to extend in a uniform cross-sectional shape in the longitudinal direction (groove length).

[0031] Each fixing groove 2A is configured so that the corresponding fixing member 4 can be pressed into place from the back side of the cushion to secure the fixing member 4 in a position to prevent it from falling out. Each fixing groove 2A is configured so that the corresponding fixing member 4 can be pressed into place with relatively light force, even if the seat cushion 2 forming the groove wall is made of hard polypropylene foam.

[0032] Below, Figure 2 Taking the illustrated set of structures as an example, the structures of the respective fixing grooves 2A and the respective fixing members 4 pressed into the fixing grooves 2A will be described in detail. The other sets of fixing grooves 2A and fixing members 4 have the same structures.

[0033] like Figure 3As shown in FIG. 2 , the groove wall of the fixing groove 2A is not flatly extended along the groove length direction, but is formed into a concave-convex shape with dam-like convex groove walls A1 protruding at various locations. Figure 4~Figure 5 As shown, these convex groove walls A1 form the pressing surface when the stopper 4 is pressed in.

[0034] like Figure 3 As shown, the fixing groove 2A is formed by each protruding groove wall A1, and the other groove walls are formed as groove walls A2 that are relatively recessed relative to the protruding groove walls A1. Each groove wall A2 is formed to form a flat surface extending flush with each other in the groove length direction in each groove wall of the fixing groove 2A.

[0035] Each convex groove wall A1 is configured to protrude from each concave groove wall A2 in the same shape. Each convex groove wall A1 is formed into a horizontally long shape with a protruding width in the groove length direction being greater than its protruding length. Figure 2 As shown, each convex groove wall A1 is formed to have a uniform cross-sectional shape over substantially the entire region in the groove depth direction of the fixing groove 2A.

[0036] like Figure 3 Specifically, four protruding groove walls A1 are formed at two locations along the groove length of each wall of the fixing groove 2A. Each pair of protruding groove walls A1 aligned along the groove length of each wall of the fixing groove 2A are spaced apart from each other along the groove length. The protruding groove walls A1 formed on each wall of the fixing groove 2A are positioned so as to face each other along the groove width.

[0037] The dimension between the convex groove walls A1 facing each other in the groove width direction, i.e., the minimum groove width W2, is smaller than Figure 4~Figure 5 The maximum cross-sectional width W1 of the press-fit portion 4B of the stopper 4 is the dimension between the two front ends of each barb B1. Figure 4 As shown, the maximum groove width W3, i.e., the dimension between the groove walls A2 facing each other in the groove width direction, formed in each groove wall of the fixing groove 2A is larger than the cross-sectional width W1 of the fixing member 4. The plate thickness of the press-fit portion 4B of the fixing member 4 is smaller than the minimum groove width W2.

[0038] By setting such a structure, the barbs B1 of the fixing member 4 are pressed against the inner surface of the convex groove wall A1 by inserting the press-fit portion 4B of the fixing member 4 into the fixing groove 2A. Figure 5 As shown, the stopper 4 is pressed into the groove by the press-in portion 4B, so that the barbs B1 are elastically narrowed by contact with the inner surface of the convex groove wall A1 and pressed into the groove along the inner surface of the convex groove wall A1.

[0039] The press-fit portion 4B of the fastener 4 is pressed into the retaining groove 2A until its sewn portion 4A is pressed against the back surface of the seat pad 2. This causes the barbs B1 to engage with the inner surfaces of the protruding groove walls A1, acting as wedges to restrict the fastener 4 from moving out of the retaining groove 2A. As a result, the distal end 3A of the seat cover 3, sewn to the fastener 4, is secured to the back surface of the seat pad 2.

[0040] like Figure 4 Specifically, the fastener 4 is held in a state of being pressed and clamped in the groove width direction at two locations along the groove length direction by the four convex groove walls A1.

[0041] The retaining member 4 contacts only the protruding groove walls A1 formed in a portion of the retaining groove 2A, not the recessed groove walls A2. Therefore, compared to a structure where the retaining member 4 has a large contact area with the retaining groove 2A's groove walls over the entire length of the groove, the retaining member 4 can be pressed into the retaining groove 2A with a smaller insertion load. Furthermore, after being pressed into place, the retaining member 4 is properly held in place by the wedging action created by the hooking of the two barbs B1, preventing it from being pulled out of the retaining groove 2A due to tension on the seat cover 3.

[0042] In summary, the seat cushion body 1 according to the present embodiment has the following structure: In addition, the reference numerals in parentheses below are reference numerals corresponding to the respective structures shown in the above embodiment.

[0043] That is, the seat cushion body (1) has a seat pad (2) and a seat cover (3) covering the seat pad (2). The seat cushion body (1) has: a fixing groove (2A) formed on the back of the pad of the seat pad (2); and a fixing piece (4) sewn to the end (3A) of the seat cover (3) and pressed into the fixing groove (2A). The groove wall of the fixing groove (2A) has: a convex groove wall (A1) protruding in a manner forming a pressing surface of the fixing piece (4); and a concave groove wall (A2) arranged in the groove length direction with the convex groove wall (A1) and recessed in a manner to avoid contact with the fixing piece (4).

[0044] According to the above structure, when the stopper (4) is pressed into the stopper groove (2A), the stopper (4) can be pressed only against the convex groove wall (A1) without contacting the concave groove wall (A2). As a result, the contact area of ​​the stopper (4) with the groove wall can be reduced, and the pressing load can be reduced.

[0045] In addition, a plurality of convex groove walls (A1) are provided in the groove length direction. According to the above structure, the stopper (4) can be brought into contact with the convex groove wall (A1) at a plurality of locations in the groove length direction. As a result, the stopper (4) can be brought into contact with the convex groove wall (A1) in a manner that does not tilt within the stopper groove (2A), thereby appropriately improving the assembly performance and the retention performance after assembly.

[0046] In addition, the convex groove wall (A1) is provided on both groove walls of the fixing groove 2A. According to the above structure, the fixing member (4) can be partially abutted against each groove wall. As a result, the pressing load of the fixing member (4) can be more appropriately reduced.

[0047] In addition, the convex groove wall (A1) is provided at a position where the two groove walls face each other. According to the above structure, the stopper (4) can be held in a sandwiched manner by the convex groove wall (A1) located at a position where the two groove walls face each other. Thus, the stopper (4) can be held so as not to tilt in the stopper groove (2A).

[0048] In addition, the cross-sectional width (W1) of the stopper (4) pressed into the stopper groove (2A) is larger than the minimum groove width (W2) of the stopper groove (2A) that is narrowed by the protrusion of the convex groove wall (A1), and smaller than the maximum groove width (W3) that is widened by the depression of the concave groove wall (A2). According to the above structure, the amount of engagement of the stopper (4) with respect to the convex groove wall (A1) can be appropriately ensured, and the contact with the concave groove wall (A2) can be appropriately avoided to reduce the press-in load.

[0049] In addition, the stopper (4) has a plurality of arrow-shaped barbs (B1) in the pressing direction that are hooked on the convex groove wall (A1) by being pressed into the stopper groove (2A). According to the above structure, the pressing load of the stopper (4) can be reduced, and the stopper (4) can be fixed to the stopper groove (2A) in a state that is appropriately prevented from coming off.

[0050] Second Implementation Method Next, use Figure 6 The structure of the seat cushion body 1 according to the second embodiment of the present invention will be described. In this embodiment, a total of three convex groove walls A1 are formed on each groove wall of the fixing groove 2A.

[0051] Specifically, two protruding groove walls A1 are formed on one side of the retaining groove 2A, aligned along the groove's length. Furthermore, one protruding groove wall A1 is formed on the other side of the groove. This single protruding groove wall A1 is positioned between the two protruding groove walls A1 formed on the other side of the groove. Specifically, the two protruding groove walls A1 formed on one side of the groove and the single protruding groove wall A1 formed on the other side of the groove are arranged so as not to overlap along the groove's length.

[0052] By arranging the convex groove walls A1 so that they do not face each other in the groove width direction, a large space is ensured between each convex groove wall A1 and the opposing groove wall (concave groove wall A2) into which the press-fit stopper 4 can be inserted. This improves the ease of assembly of the stopper 4. The structure other than the above is identical to that shown in the first embodiment, and thus the same reference numerals are used, and detailed descriptions are omitted.

[0053] Third Implementation Method Next, use Figure 7 The structure of a seat cushion body 1 according to a third embodiment of the present invention will now be described. In this embodiment, a protruding groove wall A1 is formed on each groove wall of the fixing groove 2A. Each protruding groove wall A1 is formed at positions facing each other in the groove width direction (i.e., at positions where they overlap in the groove length direction).

[0054] Thus, even if only one protruding groove wall A1 is formed on each groove wall, the protruding groove wall A1 can be used to press the stopper 4 in the groove width direction for fixation. The structure other than the above is the same as that shown in the first embodiment, and thus the same reference numerals are used and detailed description is omitted.

[0055] Fourth Implementation Method Next, use Figure 8 The structure of the seat cushion body 1 according to the fourth embodiment of the present invention will be described. In this embodiment, a convex groove wall A1 is formed only on one groove wall of the fixing groove 2A, and no convex groove wall A1 is formed on the other groove wall (only a concave groove wall A2 is formed).

[0056] The stopper 4 is configured so that it abuts only against the protruding groove wall A1 on the side of the groove wall where the protruding groove wall A1 is formed, and abuts against the entire length of the groove on the other side of the groove wall where the protruding groove wall A1 is not formed. Even with this configuration, the contact area between the stopper 4 and the side of the groove wall where the protruding groove wall A1 is formed can be reduced, thereby reducing the press-fitting load.

[0057] It should be noted that in this embodiment, since the protruding groove wall A1 is only provided on one groove wall, the minimum groove width W2 of the retaining groove 2A, which is narrowed by the protrusion of the protruding groove wall A1, is the dimension between the inner surface of the protruding groove wall A1 and the concave groove wall A2 it faces. The structure other than the above is the same as that shown in the first embodiment, and thus the same reference numerals are used, and detailed description is omitted.

[0058] Regarding Other Implementation Methods As mentioned above, although embodiment of the present invention was demonstrated using four embodiments, this invention can be implemented in various forms other than the above-mentioned embodiment.

[0059] 1. The seat cushion body of the present invention can be applied to seats for vehicles other than automobiles, such as railways, in addition to automobile seats. Furthermore, the seat cushion body can also be applied to seats for vehicles other than automobiles, such as airplanes and ships.

[0060] In addition, the seat cushion body can be applied to seats other than vehicles, such as seats installed in various facilities such as sports facilities, theaters, concert venues, and event venues, massage seats, etc. In addition, the seat cushion body can be applied to seat backs in addition to seat cushions.

[0061] 2. The convex groove wall may protrude in any shape, as long as it forms a press-fit surface for the retaining member. Besides a prismatic shape, it may also protrude in a semicircular, triangular, or trapezoidal columnar shape with a cross-section tapering toward the groove. Furthermore, the convex groove wall may protrude in any other shape, such as a structure where the surface of the protruding tip is curved in an undulating manner along the longitudinal direction of the groove.

[0062] The protruding groove walls may be provided in a number or arrangement other than the patterns shown in the above embodiments. For example, a plurality of protruding groove walls may be provided on only one groove wall, arranged in a pattern along the groove length. Furthermore, depending on the length of the retaining groove and retaining member, three or more protruding groove walls may be provided on each groove wall or on one groove wall. When multiple protruding groove walls are provided, the shapes and sizes of the protruding groove walls do not need to be identical. Description of Reference Numerals

[0063] 1 cushion body 2 seat pads 2A fixing groove A1 convex groove wall A2 groove wall 3 seat covers 3A terminal 4 stop firmware 4A suture 4B press-fit part B1 Barb W1 section width W2 minimum slot width W3 maximum slot width.

Claims

1. A seat cushion body comprising a seat pad and a seat cover covering the seat pad, The cushion body has: a fixing groove formed on a back surface of the seat cushion; as well as A fixing member is sewn to the end of the seat cover and pressed into the fixing groove. The groove wall of the fixing groove has: a convex groove wall protruding in a manner forming a pressing surface of the stopper; as well as The groove wall is aligned with the convex groove wall in the groove length direction and is recessed in a manner to avoid contact with the stopper.

2. The seat cushion body according to claim 1, wherein: A plurality of convex groove walls are provided in the length direction of the groove.

3. The cushion body according to claim 1 or 2, wherein: The convex groove wall is arranged on the two groove walls of the fixing groove.

4. The seat cushion body according to claim 3, wherein: The convex groove wall is arranged at the opposite positions of the two groove walls.

5. The seat cushion body according to claim 3, wherein: The convex groove walls provided on the two groove walls are arranged so as not to overlap with each other in the groove length direction.

6. The seat cushion body according to claim 1 or 2, wherein: The cross-sectional width of the fixing member pressed into the fixing groove is larger than the minimum groove width of the fixing groove narrowed by the protrusion of the convex groove wall, and smaller than the maximum groove width widened by the depression of the concave groove wall.

7. The cushion body according to claim 6, wherein: The fixing member includes a plurality of arrow-shaped barbs in a press-fitting direction that are hooked on the convex groove wall when pressed into the fixing groove.

8. A cushion body comprising: a seat cushion having a retaining groove formed on a back surface of the cushion; a seat cover configured to cover the seat cushion; as well as The fixing member is configured to be sewn to the end of the seat cover and pressed into the fixing groove. The groove wall of the fixing groove has: a convex groove wall protruding in a manner forming a pressing surface of the stopper; as well as The groove wall is aligned with the convex groove wall in the groove length direction and is recessed in a manner to avoid contact with the stopper.

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