JP7735922B2 - Cover fastener and seat cover - Google Patents

Description

The present invention relates to a cover fastener and a seat cover. More specifically, it relates to a cover fastener and a seat cover for hooking and fixing a cover skin to a seat frame.

Patent Document 1 discloses a hooking structure for securing the end of a seat cover to a seat frame. Specifically, the seat cover is secured to the seat frame by connecting a resin J-hook to the end of the cover's surface and hooking the J-hook onto the seat frame.

Japanese Patent Application Laid-Open No. 2020-137837

In the above-mentioned conventional technology, the J-hook is attached to the cover surface by stitching. Therefore, when strong tension is applied to the seat cover, stress is concentrated at the stitched area between the cover surface and the J-hook, making it prone to breakage. Therefore, the present invention provides a cover fastener and seat cover that can reduce stress concentration at the joint with the cover surface.

To solve the above problems, the cover fastener and seat cover of the present invention take the following measures.

In other words, the first aspect of the present invention is a cover fastener for hooking and securing the cover skin of a seat cover to a seat frame, comprising: a first member having a covering portion that can be folded over the cover skin; and a second member having a hooking portion that can be hooked onto the seat frame and a clamping portion that can clamp the cover portion together with the folded over cover skin in a U-shaped manner that follows the folded over shape of the cover skin, wherein the first member and the clamping portion each have a pressing portion that presses against each other to clamp the cover skin between them due to the tension applied when the cover skin is pulled by the hooking portion.

According to the first invention, the cover surface, which receives tension from the hook portion, can be locked by being sandwiched between the pressing portions of the cover fasteners that are pressed together by this tension. Therefore, compared to a configuration in which the cover fasteners are attached to the cover surface by sewing, the tensile stress on the cover surface can be more widely distributed.

The second aspect of the present invention is a cover fastener according to the first aspect, in which the covering portion is formed with an insertion claw that can be inserted into a hole formed in the folded portion of the cover skin.

According to the second invention, the cover fastener can be properly positioned relative to the cover surface and firmly attached to prevent it from coming loose.

The third aspect of the present invention is a cover fastener according to the second aspect, in which the insertion claw is fitted into the hole so that movement in the direction along the folded portion is restricted.

According to the third aspect of the invention, the cover fastener can be attached in a state where it is more appropriately positioned relative to the cover surface.

The fourth aspect of the present invention is a cover fastener according to any one of the first to third aspects, wherein the first member and the clamping portion are each formed with a locking claw that engages with each other to prevent them from coming loose when the covering portion is inserted into the clamping portion through a U-shaped opening together with the cover skin that is folded over and covered therewith; the first member is formed with a pressing claw that is pressed against the locking claw of the clamping portion when the tension applied by the hook portion presses the cover skin in the direction of being further inserted into the clamping portion, and the pressing claw and the locking claw of the clamping portion form each of the pressing portions.

According to the fourth aspect of the invention, the configuration of the locking claws on the clamping portion of the second member can be utilized to rationally configure each pressing portion that clamps and locks the cover skin.

The fifth aspect of the present invention is a cover fastener according to any one of the first to third aspects, wherein the first member and the clamping portion are each formed with a locking claw that engages with each other to prevent them from coming loose when the covering portion, together with the cover skin that is folded over, is inserted into the clamping portion through a U-shaped opening, and each of the pressing areas is formed by each of the locking claws.

According to the fifth aspect of the invention, the configuration of each locking claw, which is used to insert and lock the first member into the clamping portion of the second member, can be utilized to rationally configure each pressing portion that clamps and locks the cover skin.

The sixth aspect of the present invention is a cover fastener according to the fifth aspect, wherein the locking claws have a barbed shape that engages with each other to prevent them from coming loose.

According to the sixth aspect, the cover fastener can be more firmly attached to the cover surface.

The seventh aspect of the present invention is a cover fastener according to any one of the first to third aspects, further comprising an integral hinge that connects the first member and the second member by integral molding so that they can move relative to each other.

According to the seventh aspect of the present invention, it is possible to manage the first member and the second member as a single component. Furthermore, after the first member is clamped between the clamping portions of the second member, it is possible to appropriately prevent the first member from sliding sideways along the clamping portions.

An eighth aspect of the present invention is a seat cover having a planar cover skin and a cover hook that is connected to the cover skin and hooked onto a seat frame, wherein the cover hook comprises:
A seat cover comprising: a first member having a covering portion that can be folded over the cover skin; and a second member having a hooking portion that can be hooked onto the seat frame and a clamping portion that can clamp the covering portion together with the cover skin that is folded over in a U-shaped clamping shape that follows the folded shape of the cover skin, wherein the first member and the clamping portion each have a pressing portion that presses against each other to clamp the cover skin between them due to the tension applied to the cover skin by the hooking portion.

According to the eighth aspect of the invention, the cover skin, which receives tension from the hook portion, can be locked by being sandwiched between the pressing portions of the cover fasteners that are pressed together by this tension. Therefore, compared to a configuration in which the cover fasteners are joined to the cover skin by sewing, the tensile stress on the cover skin can be more widely distributed.

1 is a perspective view illustrating a configuration of a seat to which a seat cover including a cover fastener according to a first embodiment is applied. 2 is a cross-sectional view taken along line II-II of FIG. 1. FIG. 3 is an enlarged perspective view of a terminal structure of the seat cover corresponding to FIG. 2 . FIG. 10 is a perspective view showing an initial state before the cover fastener is joined to the cover surface. 10 is a side view showing a state in which the insertion claws of the first member are inserted into the holes in the cover skin. FIG. 10 is a side view showing a state in which the second member is inverted and the first member is inserted into the clamping portion. FIG. FIG. 10 is a side view illustrating a state in which the first member is inserted into the clamping portion. FIG. 10 is an enlarged side view of a main part of the cover fastener after assembly. FIG. 5 is an enlarged perspective view corresponding to FIG. 3 and illustrating a schematic configuration of a seat cover including a cover fastener according to a second embodiment. FIG. 2 is an enlarged side view of a main part of the cover fastener. 10 is a cross-sectional view showing a state in which a clamping portion is deformed due to tension applied to the seat cover. FIG. FIG. 10 is an enlarged perspective view corresponding to FIG. 3 and illustrating a schematic configuration of a seat cover including a cover fastener according to a third embodiment. FIG. 2 is an enlarged side view of a main part of the cover fastener.

The following describes an embodiment of the present invention with reference to the accompanying drawings.

(First embodiment)
First, the configuration of a seat cover (cushion cover 3C) equipped with a cover fastener 20 according to a first embodiment of the present invention will be described with reference to Figures 1 to 8. In the following description, when directions such as front, back, up, down, left, and right are indicated, they refer to the respective directions shown in the respective figures. Furthermore, when the term "seat width direction" is used, it refers to the left-right direction of the seat 1, which will be described later. Furthermore, in the following description, when no specific reference figure is indicated or when no reference figure has a corresponding reference symbol, any of Figures 1 to 8 will be referenced as appropriate.

As shown in Figure 1, a seat cover (cushion cover 3C) equipped with a cover fastener 20 according to this embodiment is applied to a seat 1 that constitutes the right-hand seat of an automobile. Specifically, the seat 1 comprises a seat back 2 that forms the backrest for a seated occupant, and a seat cushion 3 that forms the seating area.

Although not specifically shown in the drawings, the seat cushion 3 has a metal cushion frame 3F (seat frame) that forms the internal skeleton, and a urethane foam cushion pad 3P that forms the cushion portion. The seat cushion 3 also has a fabric cushion cover 3C (seat cover) that covers its entire surface. The cushion cover 3C may also be made of leather material such as synthetic leather or natural leather.

The cushion cover 3C is placed over the entire surface of the seat cushion 3, and then its front, rear, left, and right edges are pulled downward and hooked onto the cushion frame 3F. As a result, the cushion cover 3C is stretched over the entire surface of the seat cushion 3, with the cushion pad 3P it covers pressed against the cushion frame 3F.

Specifically, as shown in Figure 2, the cushion cover 3C is configured such that resin cover fasteners 20 are attached to each peripheral edge of the planar cover skin 10 that forms the cover body. Each cover fastener 20 is hooked onto the cushion frame 3F from below, thereby fastening each peripheral edge of the cushion cover 3C to the cushion frame 3F.

As such, the cushion cover 3C is configured to include a cover skin 10 made of a planar fabric member and a resin cover fastener 20 that is joined to the periphery of the cover skin 10 and hooked onto the cushion frame 3F. The cover fastener 20 is not joined to the cover skin 10 by sewing, but is joined by sandwiching the cover skin 10 between its constituent members (first member 21 and second member 22).

The cover fastener 20 and the assembly structure of the cover skin 10 to the cover fastener 20 will be described in detail below. As shown in Figures 3 and 4, the cover fastener 20 is composed of a resin first member 21, a second member 22, and an integral hinge 23A that connects these members so that they can move relative to one another. The first member 21, the second member 22, and the integral hinge 23A are integrally molded together using injection molding, forming them as a single, continuous part.

As shown in Figure 4, the cover fastener 20, with the exception of the insertion claws 21B (described below), is shaped like a long plate that extends at a constant cross section along the periphery of the cover skin 10. Specifically, as shown in Figures 4 and 5, the first member 21 is configured such that a covering portion 21A is formed at one end of the short side of the long plate, allowing the cover skin 10 to be folded over and covered along that end.

Arrowhead-shaped protrusions 21B are formed at various longitudinal locations on the end surface of the covering portion 21A, where the folded portion 13 of the cover skin 10 is placed. The protrusions 21B are aligned at equal intervals in the longitudinal direction. Each protrusion 21B is inserted into a corresponding hole 13A formed in the folded portion 13 of the cover skin 10.

Each hole 13A is shaped like an elongated hole that fits snugly into the cylindrical portion at the base of each insertion claw 21B, rather than the arrowhead portion at the tip. When each insertion claw 21B is inserted into its corresponding hole 13A, the diameter of the hole 13A is elastically expanded by inserting the arrowhead portion at its tip.

By inserting the insertion claws 21B, the holes 13A are fitted into the cylindrical base portions of the insertion claws 21B. As a result, the first member 21 is positioned relative to the cover skin 10 and is secured against removal.

A locking claw 21C that protrudes diagonally in the thickness direction is formed in the middle of the first member 21 in the short side direction. Furthermore, a pressing claw 21D that protrudes in the thickness direction, the same direction as the locking claw 21C, is formed at the other end of the first member 21 in the short side direction.

The second member 22 is configured such that one end of its long plate in the short direction is formed with a hook portion 22A that is curved with a J-shaped cross section and can be hooked onto the cushion frame 3F described above in Figure 2. The second member 22 is also configured such that the other end of its short direction is formed with a clamping portion 22B that has a U-shaped cross section.

As shown in Figures 6 to 8, the clamping portion 22B is configured so that the cover portion 21A of the first member 21, together with the cover skin 10, can be inserted through its U-shaped opening A to hold them in a clamped state. Specifically, the clamping portion 22B has a top plate B1 that extends from the hook portion 22A to form a flush, flat plate, and a clamping piece B2 that extends in the thickness direction of the top plate B1 from the other end of the top plate B1 in the short direction toward one end of the short direction, with an L-shaped cross section, forming a clamping shape with a U-shaped cross section.

A locking claw B3 is formed at the tip of the clamping piece B2 facing the opening A, narrowing the opening A toward the top plate B1. The width of the opening A between the locking claw B3 and the top plate B1 is set to be wider by approximately the thickness of the cover skin 10 than the thickness of the flat portion of the first member 21 other than where the locking claw 21C and the pressing claw 21D are formed. Furthermore, the distance between the flat portion of the clamping piece B2 other than where the locking claw B3 is formed and the top plate B1 is set to be wider by approximately the thickness of the cover skin 10 than the thickness of the first member 21 where the locking claw 21C is formed.

As shown in Figures 6 and 7, with the above configuration, the second member 22 can be configured to engage with the clamping portion 22B of the first member 21 in a state where it is prevented from slipping out by inserting the cover portion 21A of the first member 21 together with the cover skin 10 through the U-shaped opening A into the clamping portion 22B of the second member 22. Specifically, the first member 21 is pressed from the rear by the pressing claws 21D using a plate-shaped pressing jig T, so that the cover portion 21A of the first member 21 is inserted together with the cover skin 10 into the clamping portion 22B of the second member 22.

At this time, the first member 21 is inserted to a position where its locking claw 21C passes over the locking claw B3 of the clamping portion 22B of the second member 22 in the insertion direction, while its locking claw 21C presses against the locking claw B3 of the clamping portion 22B, bending the clamping piece B2 downward in the illustration. As a result, the first member 21 is prevented from coming out of the clamping portion 22B of the second member 22 in the direction opposite the insertion direction due to the engagement of the locking claws 21C and B3 with each other. Each locking claw 21C and B3 is formed with a hook-like barb so that they can apply a strong retention force to each other.

Assembled as described above, the first member 21 and the second member 22 are held in a state in which the cover skin 10 is sandwiched between them. The specific structure of the cover skin 10 will be described in detail later.

As shown in Figures 4 and 5, integral hinge 23A is configured to connect the end face of the other short end of first member 21 (the end on the side where pressing claw 21D is formed) to the outer surface of the U-shaped connecting portion of clamping portion 22B of second member 22 in a thin plate shape. As a result, as shown in Figures 5 to 7, integral hinge 23A is configured to connect first member 21 and second member 22 so that they can freely move and rotate in directions that bring them closer to or separate from each other, as they flex.

The integral hinge 23A is shaped to connect the first member 21 and the second member 22 with a long, thin plate in the longitudinal direction of the first member 21 and the second member 22. This configuration appropriately prevents the first member 21 from sliding sideways along the clamping portion 22B when the first member 21 is clamped between the clamping portion 22B of the second member 22.

As shown in FIG. 6, the integral hinge 23A has a circumferential length that allows the first member 21 to be set in a relaxed state without tension between the first member 21 and the second member 22, even when the cover portion 21A of the first member 21 is inserted into the clamping portion 22B of the second member 22 and the first member 21 is placed against the top plate B1 from below, away from the U-shaped opening A of the clamping portion 22B of the second member 22. Therefore, as shown in FIGS. 6 and 7, the cover portion 21A of the first member 21 can be easily inserted into the clamping portion 22B of the second member 22.

As shown in Figure 5, the insertion claws 21B of the first member 21 are inserted into the holes 13A of the cover skin 10. Then, as shown in Figures 6 and 7, the first member 21 is inserted into and latched onto the clamping portion 22B of the second member 22, so that the folded portion 13 is set in a state where it is inserted inside the clamping portion 22B. Accordingly, the portion of the cover skin 10 extending from the folded portion 13 toward the tensioning portion 12 that covers the seat cushion 3 (see Figure 1) passes between the covering portion 21A of the first member 21 and the top plate B1 of the second member 22 and is pulled out to the outside through the U-shaped opening A.

The portion of the cover skin 10 extending from the folded portion 13 toward the terminal 11 passes between the covering portion 21A of the first member 21 and the clamping piece B2 of the second member 22, and is then unwound from the U-shaped opening A to the outside. Specifically, the portion of the cover skin 10 extending from the folded portion 13 toward the terminal 11 is covered by the locking claw 21C of the first member 21, which protrudes downward in the illustration, and the locking claw B3, which protrudes upward in the illustration from the clamping piece B2 of the second member 22, and passes between them in a zigzag pattern before being unwound from the U-shaped opening A to the outside.

As a result, the portion of the cover skin 10 extending from the folded portion 13 toward the terminal end 11 passes between the alternately protruding locking claws 21C of the first member 21 and the locking claws B3 of the second member 22, is valley-folded from the folded portion 13, and then mountain-folded, before being unfolded to the outside through the U-shaped opening A. After the above assembly, as shown in Figure 2, the cover skin 10 is stretched over the surface of the seat cushion 3 so that the tensioning portion 12 is pulled in a direction away from the hook portion 22A of the second member 22.

At this time, the cover skin 10 is folded back so that its end 11 overlaps the outer surface of the clamping piece B2, and is set so that it is sandwiched between the tensioning portion 12 and the clamping piece B2. With the above configuration, when the cover skin 10 is tensioned, the cover hook 20 is subjected to tension, being pulled upward in the illustration by the tensioning portion 12 of the cover skin 10, with the hooking portion 22A hooked on the cushion frame 3F as a fulcrum.

As a result, as shown in Figure 8, the cover fastener 20 receives a force from the tensioning portion 12 that pulls the first member 21 to the right in the figure. As a result, the pressing claw 21D of the first member 21 is pressed against the locking claw B3 of the second member 22 from the left in the figure, sandwiching the cover skin 10 (the portion extending from the folded portion 13 toward the terminal 11) therebetween.

As a result of the above action, the cover fastener 20 firmly prevents the terminal 11 from coming loose by having the extension portion 12 of the cover skin 10 clamp the terminal 11 between the clamping piece B2 to lock it from moving, and by having the pressing claw 21D of the first member 21 clamp the cover skin 10 (the portion extending from the folded portion 13 toward the terminal 11) between the locking claw B3 of the second member 22 to lock it from moving.

At this time, the force with which the tensioning portion 12 of the cover skin 10 pinches the terminal 11 between the clamping piece B2 and locks movement is applied widely in a planar or linear manner over the entire longitudinal area along the terminal 11 of the cover skin 10. Furthermore, the force with which the pressing claw 21D of the first member 21 pinches the cover skin 10 (the portion extending from the folded portion 13 toward the terminal 11) between the locking claw B3 of the second member 22 and locks movement is also applied widely in a planar or linear manner over the entire longitudinal area of the cover skin 10.

Therefore, even if strong tension is applied from the tensioned portion 12 of the cover skin 10, localized stress concentration is unlikely to occur in the areas where the locking force is applied, making breakage unlikely. Here, the pressing claw 21D of the first member 21 and the locking claw B3 of the second member 22 against which this pressing claw 21D is pressed each correspond to the "pressing portion" in the present invention.

Therefore, even if the cover surface 10 is made of a material with relatively low tear strength, such as a low-basis-weight fabric or nonwoven fabric, or a thin film-like resin (polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), olefin-based thermoplastic elastomer (TPO), etc.), the cover surface 10 can be properly attached to the seat cushion 3 using the cover fastener 20.

Furthermore, when removing the cover skin 10 from the cover fastener 20, it can be easily removed by simply opening the clamping portion 22B of the second member 22 and pulling out the first member 21. Therefore, compared to a configuration in which the cover skin 10 is integrally joined to the cover fastener 20 by sewing, they can be easily disassembled and recycled.

Furthermore, the cover fastener 20 can be easily positioned by inserting it through the hole 13A provided in the cover surface 10. Therefore, the assembly work can be easily performed without requiring advanced sewing skills.

To summarize the above, the cover fastener 20 and cushion cover 3C according to this embodiment have the following configuration. Note that the reference numerals in parentheses below correspond to the respective components shown in the above embodiment.

In other words, the cover fastener (20) is a fastener for hooking and securing the cover skin (10) of the seat cover (3C) to the seat frame (3F). The cover fastener (20) has a first member (21) having a covering portion (21A) that can be folded over the cover skin (10), and a second member (22) having a hooking portion (22A) that can be hooked onto the seat frame (3F) and a clamping portion (22B) that can clamp the covering portion (21A) together with the cover skin (10) in a U-shaped clamping shape that follows the folded over shape of the cover skin (10).

The first member (21) and the clamping portion (22B) each have pressing portions (21D, B3) that press the cover surface (10) against each other to sandwich it due to the tension applied to the cover surface (10) by the hook portion (22A). With the above configuration, the cover surface (10), which receives tension from the hook portion (22A), can be locked by being sandwiched between the pressing portions (21D, B3) of the cover fastener (20), which press against each other due to this tension. Therefore, compared to a configuration in which the cover fastener (20) is joined to the cover surface (10) by stitching, the tensile stress applied to the cover surface (10) can be more widely distributed.

In addition, the covering portion (21A) is formed with an insertion claw (21B) that can be inserted into a hole (13A) formed in the folded portion (13) of the cover skin (10). This configuration allows the cover fastener (20) to be properly positioned relative to the cover skin (10) and firmly connected to prevent it from slipping out.

Furthermore, the insertion claw (21B) is fitted into the hole (13A) so that movement in the direction along the folded portion (13) is restricted. This configuration allows the cover fastener (20) to be more appropriately positioned relative to the cover skin (10).

The first member (21) and the clamping portion (22B) are each formed with locking claws (21C, B3) that engage with each other to prevent them from coming loose when the covering portion (21A) is inserted into the clamping portion (22B) through the U-shaped opening together with the cover skin (10) that is folded over. The first member (21) is formed with a pressing claw (21D) that is pressed against the locking claw (B3) of the clamping portion (22B) when the cover skin (10) is pressed further into the clamping portion (22B) by the tension applied by the hook portion (22A). The pressing claw (21D) and the locking claw (B3) of the clamping portion (22B) form each pressing portion (21D, B3).

With the above configuration, the configuration of the locking claw (B3) of the clamping portion (22B) of the second member (22) can be utilized to rationally configure each pressing portion (21D, B3) that clamps and locks the cover skin (10).

The cover fastener (20) also includes an integral hinge (23A) that connects the first member (21) and the second member (22) so that they can move relative to each other through integral molding. This configuration makes it possible to manage the first member (21) and the second member (22) as a single component. Furthermore, after the first member (21) is clamped between the clamping portions (22B) of the second member (22), it is possible to appropriately prevent the first member (21) from sliding sideways along the clamping portions (22B).

The seat cover (3C) also includes a planar cover skin (10) and a cover hook (20) that is connected to the cover skin (10) and hooked onto the seat frame (3F). The cover hook (20) includes a first member (21) having a covering portion (21A) that can be folded over the cover skin (10), and a second member (22) having a hooking portion (22A) that can be hooked onto the seat frame (3F) and a clamping portion (22B) that can clamp the covering portion (21A) together with the cover skin (10) in a U-shaped manner that follows the folded shape of the cover skin (10).

The first member (21) and the clamping portion (22B) each have pressing portions (21D, B3) that press the cover surface (10) against each other to sandwich it due to the tension applied to the cover surface (10) by the hook portion (22A). With the above configuration, the cover surface (10), which receives tension from the hook portion (22A), can be locked by being sandwiched between the pressing portions (21D, B3) of the cover fastener (20), which press against each other due to this tension. Therefore, compared to a configuration in which the cover fastener (20) is joined to the cover surface (10) by stitching, the tensile stress applied to the cover surface (10) can be more widely distributed.

Second Embodiment
Next, the configuration of a seat cover (cushion cover 3C) equipped with a cover fastener 20 according to a second embodiment of the present invention will be described with reference to Figures 9 to 11. As shown in Figure 9, in the cushion cover 3C equipped with the cover fastener 20 according to this embodiment, the cover skin 10 is assembled to the cover fastener 20 as follows.

That is, the portion of the cover skin 10 extending from the folded portion 13 toward the terminal end 11 passes between the covering portion 21A of the first member 21 and the top plate B1 of the second member 22 and is pulled out from the U-shaped opening A. Furthermore, the portion of the cover skin 10 extending from the folded portion 13 toward the tensioning portion 12 that covers the seat cushion 3 (see Figure 1) passes between the covering portion 21A of the first member 21 and the clamping piece B2 of the second member 22 and is pulled out from the U-shaped opening A.

More specifically, as shown in Figure 10, the portion of the cover skin 10 extending from the folded portion 13 toward the tensioned portion 12 is fitted over the locking claw 21C of the first member 21, which protrudes downward in the figure, and the locking claw B3, which protrudes upward in the figure from the clamping piece B2 of the second member 22, and passes between them in a zigzag pattern before being extended to the outside through the U-shaped opening A.

As a result, the portion of the cover skin 10 extending from the folded portion 13 toward the tensioned portion 12 passes between the alternately protruding locking claws 21C of the first member 21 and the locking claws B3 of the second member 22, is valley-folded from the folded portion 13, and then mountain-folded, before being unfolded to the outside through the U-shaped opening A. After the above assembly, the cover skin 10 is tensioned over the surface of the seat cushion 3 so that the tensioned portion 12 is pulled in a direction away from the hook portion 22A of the second member 22 (see Figure 1).

With the above configuration, as shown in Figure 9, when the cover skin 10 is stretched, the cover hook 20 is subjected to tension pulled upward in the figure by the tensioning portion 12 of the cover skin 10, with the hook portion 22A hooked on the cushion frame 3F as a fulcrum. As a result, as shown in Figure 10, the cover hook 20 is subjected to a force from the tensioning portion 12 that pulls the first member 21 to the left in the figure. As a result, the locking claw 21C of the first member 21 is pressed against the locking claw B3 of the second member 22 from the right in the figure, with the cover skin 10 (the portion extending from the folded portion 13 toward the tensioning portion 12) sandwiched between them.

As a result of the above action, the cover fastener 20 firmly prevents the terminal 11 from coming off by having the locking claw 21C of the first member 21 pinch the cover skin 10 (the portion extending from the folded portion 13 toward the tensioned portion 12) between the locking claw B3 of the second member 22, locking it from moving. At this time, the force that pinches the cover skin 10 (the portion extending from the folded portion 13 toward the tensioned portion 12) between the locking claws 21C and B3 to lock it from moving is applied widely, either planarly or linearly, across the entire longitudinal length of the cover skin 10.

As a result, localized stress concentration on the cover skin 10 is less likely to occur, making it less likely to break. Here, each of the locking claws 21C, B3 corresponds to the "pressure area" of the present invention.

However, in the configuration of this embodiment, the tension applied from the tensioning portion 12 of the cover skin 10 causes the clamping piece B2 of the second member 22 to receive a force in a direction that opens it from the top plate B1. Therefore, as shown in FIG. 11, if excessive tension is applied from the tensioning portion 12 of the cover skin 10, the clamping piece B2 of the second member 22 will deform so as to open it from the top plate B1, making it easier for the first member 21 to slip out of the opening A of the clamping portion 22B to the left in the figure.

Also, as shown in FIG. 9, in this embodiment, the assembly of the cover skin 10 differs from that shown in the first embodiment, and accordingly, the integral hinge 23B is positioned as follows. That is, the integral hinge 23B is configured in a thin plate shape to connect the end face of the other short end of the first member 21 (the end on the side where the pressing claw 21D is formed) to the inner surface of the top plate B1 extending outside the U-shape of the clamping portion 22B of the second member 22. Even with this configuration, the integral hinge 23B can flex and freely move and rotate the first member 21 and the second member 22 in directions that bring them closer to or farther away from each other.

Other than the above, the configuration is substantially the same as the configuration shown in the first embodiment. Therefore, the same components as those shown in the first embodiment will be assigned the same reference numerals and detailed descriptions will be omitted.

To summarize the above, the cover fastener and cushion cover 3C according to this embodiment have the following configuration. Note that the reference numerals in parentheses below correspond to the respective components shown in the above embodiment.

That is, the first member (21) and the clamping portion (22B) are each formed with locking claws (21C, B3) that engage with each other to prevent them from coming loose when the covering portion (21A) is inserted into the clamping portion (22B) through the U-shaped opening along with the cover skin (10) that is folded over. Each locking claw (21C, B3) forms each pressing portion (21C, B3). With the above configuration, the configuration of each locking claw (21C, B3) for inserting and locking the first member (21) into the clamping portion (22B) of the second member can be utilized to rationally configure each pressing portion (21C, B3) that clamps and locks the cover skin (10).

In addition, each locking claw (21C, B3) has a barbed shape that allows them to engage with each other to prevent them from coming loose. This configuration allows the cover fastener to be more firmly attached to the cover skin (10).

(Third embodiment)
Next, the configuration of a seat cover (cushion cover 3C) equipped with a cover fastener 20 according to a third embodiment of the present invention will be described with reference to Figures 12 and 13. As shown in Figure 12, in the cushion cover 3C equipped with the cover fastener 20 according to this embodiment, the shape of the second member 22 and the assembly of the cover skin 10 to the cover fastener 20 are as follows.

That is, the second member 22 has a hook portion 22A, which is curved with a J-shaped cross section and hooked onto the cushion frame 3F, extending from the top plate B1 of the clamping portion 22B to the side opposite the side where the U-shaped opening A is formed. Furthermore, the portion of the cover skin 10 that extends from the folded portion 13 toward the tension portion 12 that covers the seat cushion 3 (see Figure 1) passes between the covering portion 21A of the first member 21 and the top plate B1 of the second member 22 and is pulled out to the outside through the U-shaped opening A.

The portion of the cover skin 10 extending from the folded portion 13 toward the terminal 11 passes between the covering portion 21A of the first member 21 and the clamping piece B2 of the second member 22, and is then unwound from the U-shaped opening A. Specifically, as shown in FIG. 13 , the portion of the cover skin 10 extending from the folded portion 13 toward the terminal 11 is covered by the locking claw 21C of the first member 21, which protrudes downward in the illustration, and the locking claw B3, which protrudes upward in the illustration from the clamping piece B2 of the second member 22, and passes between them in a zigzag pattern before being unwound from the U-shaped opening A.

As a result, the portion of the cover skin 10 extending from the folded portion 13 toward the terminal end 11 passes between the alternately protruding locking claws 21C of the first member 21 and the locking claws B3 of the second member 22, is valley-folded from the folded portion 13, and then mountain-folded before being unfolded to the outside through the U-shaped opening A. After the above assembly, the cover skin 10 is stretched over the surface of the seat cushion 3 so that the tensioning portion 12 is pulled in a direction away from the hook portion 22A of the second member 22 (see Figure 1).

With the above configuration, as shown in FIG. 12, when the cover skin 10 is tensioned, the cover hook 20 is pulled upward in the figure by the tensioning portion 12 of the cover skin 10, with the hook portion 22A hooked on the cushion frame 3F as a fulcrum. As a result, as shown in FIG. 13, the cover hook 20 is subjected to a force from the tensioning portion 12 that pulls the first member 21 to the right in the figure. As a result, the locking claw 21C of the first member 21 is pressed against the locking claw B3 of the second member 22 from the left in the figure, with the cover skin 10 (the portion extending from the folded portion 13 toward the terminal 11) sandwiched between them.

As a result of the above action, the cover hook 20 firmly prevents the end 11 from coming off by having the locking claw 21C of the first member 21 pinch the cover skin 10 (the portion extending from the folded portion 13 toward the end 11) between the locking claw B3 of the second member 22, locking it from moving. At this time, the force that pinches the cover skin 10 (the portion extending from the folded portion 13 toward the end 11) between the locking claws 21C and B3 to lock it from moving is applied widely, either planarly or linearly, across the entire longitudinal length of the cover skin 10. This makes it less likely for localized stress concentrations to occur on the cover skin 10, making it less likely to break.

Other than the above, the configuration is substantially the same as the configuration shown in the first embodiment. Therefore, the same components as those shown in the first embodiment will be assigned the same reference numerals and detailed descriptions will be omitted.

Other Embodiments
Although the present invention has been described above using three embodiments, the present invention can be embodied in various forms in addition to the above embodiments.

1. The cover fastener and seat cover of the present invention can be applied to automobile seat cushions as well as other seat components such as seat backs and ottomans. They can also be widely applied to seats used in non-automotive vehicles such as trains, as well as non-vehicle vehicles such as aircraft and ships. They can also be applied to seats installed in various facilities, such as sports facilities, theaters, concert halls, and event venues, as well as non-vehicle seats such as massage seats.

2. The first and second members that make up the cover fastener may be separate, separate components that are not connected to each other by an integral hinge. The first and second members may also be connected to each other by a flexible member such as a strap.

3. The covering portion of the first member may not have positioning insertion tabs that are inserted into the holes in the cover skin, and may simply be configured so that the cover skin is folded over.

1 Seat 2 Seat back 3 Seat cushion 3F Cushion frame (seat frame)
3P Cushion Pad 3C Cushion Cover (Seat Cover)
REFERENCE SIGNS LIST 10 Cover skin 11 End 12 Extension portion 13 Folded portion 13A Hole portion 20 Cover latching tool 21 First member 21A Cover portion 21B Insertion claw 21C Lock claw (pressing portion)
21D Pressing claw (pressing area)
22 Second member 22A Hook portion 22B Clamping portion B1 Top plate B2 Clamping piece B3 Locking claw (pressing portion)
A Opening 23A Integral hinge 23B Integral hinge T Pressing jig

Claims (7)

A cover fastener for hooking and fixing the cover skin of a seat cover to a seat frame,
a first member having a covering portion that can be folded over to cover the cover skin;
a second member having a hook portion that can be hooked onto the seat frame and a clamping portion that can clamp the covering portion together with the cover skin that is folded over in a U-shaped clamping shape that follows the folded-over shape of the cover skin,
The first member and the clamping portion are each formed with a pressing portion that presses the cover skin against each other so as to sandwich the cover skin between them by tension generated when the cover skin is pulled from the hook portion ,
The cover fastener has an insertion claw formed on the covering portion that can be inserted into a hole formed in the folded portion of the cover skin . The cover fastener according to claim 1,
The cover fastener is configured such that the insertion claw is fitted into the hole so that movement in a direction along the folded portion is restricted . A cover fastener for hooking and fixing the cover skin of a seat cover to a seat frame,
a first member having a covering portion that can be folded over to cover the cover skin;
a second member having a hook portion that can be hooked onto the seat frame and a clamping portion that can clamp the covering portion together with the cover skin that is folded over in a U-shaped clamping shape that follows the folded-over shape of the cover skin,
The first member and the clamping portion are each formed with a pressing portion that presses the cover skin against each other so as to sandwich the cover skin between them by tension generated when the cover skin is pulled from the hook portion,
The first member and the clamping portion are each formed with a locking claw that engages with the first member and the clamping portion so as to be prevented from coming off each other by inserting the covering portion together with the cover skin that is folded over into the clamping portion through a U-shaped opening,
A pressure claw is formed on the first member, which is pressed in the direction of being further inserted into the clamping portion by the tension applied by the hook portion to the cover surface, and is pressed against the locking claw of the clamping portion, and each of the pressing areas is formed by the pressure claw and the locking claw of the clamping portion . A cover fastener for hooking and fixing the cover skin of a seat cover to a seat frame,
a first member having a covering portion that can be folded over to cover the cover skin;
a second member having a hook portion that can be hooked onto the seat frame and a clamping portion that can clamp the covering portion together with the cover skin that is folded over in a U-shaped clamping shape that follows the folded-over shape of the cover skin,
The first member and the clamping portion are each formed with a pressing portion that presses the cover skin against each other so as to sandwich the cover skin between them by tension generated when the cover skin is pulled from the hook portion,
The first member and the clamping portion are each formed with a locking claw that engages with the first member and the clamping portion so as to be prevented from coming off each other by inserting the covering portion together with the cover skin that is folded over into the clamping portion through a U-shaped opening,
A cover latching device in which each of the pressing portions is formed by each of the locking claws . The cover fastener according to claim 4 ,
The cover fastener has a barbed shape in which the locking claws are hooked together so as to be prevented from coming off . A cover fastener for hooking and fixing the cover skin of a seat cover to a seat frame,
a first member having a covering portion that can be folded over to cover the cover skin;
a second member having a hook portion that can be hooked onto the seat frame and a clamping portion that can clamp the covering portion together with the cover skin that is folded over in a U-shaped clamping shape that follows the folded-over shape of the cover skin,
The first member and the clamping portion are each formed with a pressing portion that presses the cover skin against each other so as to sandwich the cover skin between them by tension generated when the cover skin is pulled from the hook portion,
The cover fastener further includes an integral hinge that connects the first member and the second member by integral molding so that they can move relative to each other . A seat cover having the cover fastener according to any one of claims 1 to 6 .