JP7636196B2 - Power supply structure and wiring harness for sliding seats - Google Patents

Description

The present invention relates to a power supply structure for a sliding seat for supplying power to the sliding seat. It also relates to a wire harness that is arranged to supply power to the sliding seat.

A sliding seat that moves in the overall length direction of the vehicle is provided on the floor of the passenger compartment of a vehicle such as an automobile. The following Patent Document 1 discloses a power supply structure for a sliding seat for supplying power to the sliding seat. This power supply structure for a sliding seat is disposed on the floor.

JP 2014-3902 A

In the above-mentioned conventional technology, the power supply structure for the sliding seat is disposed on the floor, so there is a risk that the protector device constituting the power supply structure for the sliding seat may be stepped on by an occupant. As a countermeasure, a structure with increased rigidity so that it can withstand being stepped on is considered, but this has the problem of being large. In addition, in the above-mentioned conventional technology, as shown in FIG. 1 of Patent Document 1, the protector device is long and large in the overall length direction of the vehicle.

The present invention was made in consideration of the above circumstances, and aims to provide a power supply structure and wire harness for a sliding seat that can be prevented from being stepped on by passengers and can also be made compact.

The power supply structure for a sliding seat of the present invention, which has been made to solve the above problems, includes an electric wire for supplying power to a sliding seat that is arranged on a floor and moves in the overall length direction of a vehicle, and a protector device for causing the electric wire to follow the movement of the sliding seat in the overall length direction, the protector device being arranged on a side wall of the vehicle such that the electric wire is routed from the side wall toward a seat side portion of the sliding seat, and the protector device further includes a protector body that houses an electric wire middle portion of the electric wire, and a rotor that is provided in the electric wire middle portion. The protector body is formed with a guide opening that is elongated along the entire length direction and a second guide opening that is elongated along the entire length direction , the rotor is formed in a shape that bends the middle of the electric wire at the rotor arrangement position by approximately 90 degrees, and is formed in a shape that allows it to slide freely in the entire length direction guided by at least one of the guide opening and the second guide opening , and is formed in a shape that allows it to rotate freely around an axis extending from the side wall toward the side of the seat by at least one of the guide opening and the second guide opening .

According to the present invention having the features of claim 1, the protector device is disposed on the side wall of the vehicle so that the electric wires are routed from the side wall of the vehicle toward the side of the sliding seat, so that the protector device can be prevented from being stepped on by an occupant. In addition, according to the present invention, the protector device does not need to have the rigidity to withstand being stepped on by an occupant, so that the protector device can be prevented from becoming large.

Furthermore, according to the present invention, since the protector device includes a protector body and a rotor, and since the rotor is slidable and rotatable as described above, it is possible to provide a better structure in which the electric wires are routed from the side wall of the vehicle toward the side of the sliding seat, and in which the electric wires follow the movement of the sliding seat. Details of the operation will be described later in the Examples section. In the Examples section, it can also be seen that the protector device is shorter and smaller in size in the overall length direction of the vehicle than the conventional example.

The present invention described in claim 2 is characterized in that in the power supply structure for a sliding seat described in claim 1, the sliding seat is disposed in the third row counting from the front side in the overall length direction of the vehicle.

According to the present invention having the features of claim 2, it is possible to supply power to the third row seats. Since many third row sliding seats are folded up and stored against the side wall of the vehicle, the power supply structure for the sliding seats of the present invention, which is not located on the floor, can be said to be useful.

The present invention described in claim 3 is characterized in that, in the power supply structure for a slide seat described in claim 1 or 2, the protector main body is formed with the second guide opening at a position opposite the guide opening.

According to the present invention having the features of claim 3, the rotor can slide and rotate freely with respect to the second guide opening formed in the protector body, so that the electric wire can be stably tracked when the sliding sheet moves.

The invention described in claim 4 is characterized in that in the power supply structure for a sliding seat described in claim 3, the protector body is formed with an electric wire housing portion for housing the middle of the electric wire at a position closer to the floor than the position of the guide opening.

According to the present invention having the features of claim 4, the wire storage section is formed on the side where the wire hangs down due to its own weight, etc., so the storage state of the middle of the wire can be stabilized. Note that, contrary to the present invention, if the section is formed above the position of the guide opening, a mechanism for lifting it up, such as a spring member, is required to stabilize the storage state. Therefore, the present invention can stabilize the storage state of the middle of the wire without increasing the number of parts.

The present invention described in claim 5 is characterized in that in the power supply structure for a sliding seat described in claim 4, the electric wire storage section is formed in a generally V-shape in side view that is convex toward the floor side.

According to the present invention having the features of claim 5, the wire storage section is generally V-shaped in side view, convex toward the floor, so the middle of the wire fits well, resulting in a more stable storage state.

The present invention described in claim 6 is characterized in that in the power supply structure for a sliding seat described in claim 5, a bending restriction portion is formed in the electric wire housing portion to restrict the bending shape of the middle of the electric wire when the diameter is reduced.

According to the present invention having the features of claim 6, since a bending restriction portion is formed in the electric wire housing portion, the bending shape of the middle of the electric wire can be restricted when the slide sheet moves so that the diameter of the middle of the electric wire is reduced. In other words, it is possible to restrict the middle of the electric wire from being bent too sharply.

The wire harness of the present invention described in claim 7, which has been made to solve the above problems, includes an electric wire for supplying power to a sliding seat that is arranged on a floor and moves in the overall length direction of a vehicle, and a protector device for making the electric wire follow the movement of the sliding seat in the overall length direction, the protector device being formed so as to be capable of being arranged and fixed to a side wall of the vehicle and being capable of routing the electric wire from the side wall toward a seat side portion of the sliding seat, and the protector device further includes a protector body that houses an intermediate portion of the electric wire, and a protector provided in the intermediate portion of the electric wire. and a rotor that is inserted into the protector body and is secured to the protector body by a guide opening that is elongated along the entire length direction and a second guide opening that is elongated along the entire length direction , the rotor is formed in a shape that bends the middle of the electric wire at the rotor installation position by approximately 90 degrees, and is formed in a shape that allows the rotor to slide freely in the entire length direction by being guided by at least one of the guide opening and the second guide opening , and is formed in a shape that allows the rotor to rotate freely around an axis extending from the side wall toward the side of the seat by at least one of the guide opening and the second guide opening .

According to the present invention having the features of claim 7, the protector device is disposed on the side wall of the vehicle so that the electric wires are routed from the side wall of the vehicle toward the side of the sliding seat, so that the protector device can be prevented from being stepped on by an occupant. In addition, according to the present invention, the protector device does not need to have the rigidity to withstand being stepped on by an occupant, so that the protector device can be prevented from becoming large.

Furthermore, according to the present invention, since the protector device comprises a protector body and a rotor, and since the rotor is slidable and rotatable as described above, it is possible to provide a better structure in which the electric wires are routed from the side wall of the vehicle toward the side of the sliding seat, and in which the electric wires follow the movement of the sliding seat.

The present invention has the effect of providing a power supply structure and wire harness for a sliding seat that can be prevented from being stepped on by an occupant and can also be made compact.

1 is a layout diagram showing an embodiment of a power supply structure for a sliding seat and a wire harness according to the present invention. FIG. 2 is a diagram showing a state in which the slide sheet in FIG. 1 is omitted. FIG. 2 is a diagram showing the state in which FIG. 1 is viewed from a side wall of the vehicle. 1 is a perspective view showing a power supply structure for a sliding seat and a wire harness (as viewed from the protector base side). FIG. 5 is a diagram showing a moved state (first moved position) of the rotor and the wire intermediate portion of FIG. 4 . FIG. 5 is a diagram showing a moved state (second moved position) of the rotor and the wire intermediate portion of FIG. 4 . FIG. 5 is a diagram showing a moved state (third moved position) of the rotor and the wire in FIG. 4 . FIG. FIG. 5 is a diagram showing a moved state (fourth moved position) of the rotor and the wire in FIG. 4 . FIG. 6 is an enlarged perspective view of the rotor of FIG. 5 . FIG. 10 is a perspective view of the second rotor component of FIG. FIG. 4 is a perspective view showing a power supply structure for a sliding seat and a wire harness (as viewed from the protector cover side). FIG. 12 is a diagram showing a moved state (first moved position) of the rotor and the wire intermediate portion in FIG. 11 . FIG. 12 is a diagram showing a moved state (second moved position) of the rotor and the wire intermediate portion in FIG. 11 . FIG. 12 is a diagram showing a moved state (third moved position) of the rotor and the wire intermediate in FIG. 11 . FIG. 12 is a diagram showing a moved state (fourth moved position) of the rotor and the wire intermediate portion in FIG. 11 . FIG. 13 is an enlarged perspective view of the rotor of FIG. 12 . FIG. 17 is a perspective view of the first rotor component of FIG.

The power supply structure for a sliding seat is configured with an electric wire for supplying power to a sliding seat (third seat) that is disposed on the floor and moves in the overall length direction of the vehicle, and a protector device for causing the electric wire to follow the movement of the sliding seat in the overall length direction. The protector device is disposed on the side wall so that the electric wire is routed from the side wall of the vehicle toward the side of the sliding seat.

The protector device is configured with a protector body that houses the middle of the electric wire, and a rotor that is provided in the middle of the electric wire. The protector body is formed with a guide opening that is elongated and opens along the overall length direction. The rotor is formed in a shape that bends the middle of the electric wire at approximately 90 degrees at the rotor installation position. The rotor is also formed in a shape that allows it to slide freely in the overall length direction guided by the guide opening. Furthermore, the rotor is formed in a shape that allows it to rotate freely around an axis that extends from the side wall toward the side of the sheet within the guide opening.

Below, the embodiment will be described with reference to the drawings. Figure 1 is a layout diagram showing one embodiment of the power supply structure for a sliding seat and the wire harness of the present invention. Also, Figure 2 is a diagram showing the state of Figure 1 without the sliding seat, Figure 3 is a diagram showing the state of Figure 1 as viewed from the side wall of the vehicle, Figure 4 is a perspective view of the power supply structure for a sliding seat and the wire harness, Figures 5 to 8 are diagrams showing the movement state of the rotor and the intermediate electric wire of Figure 4, Figure 9 is an enlarged perspective view of the rotor of Figure 5, Figure 10 is a perspective view of the second rotor part of Figure 9, Figure 11 is a perspective view of the power supply structure for a sliding seat and the wire harness, Figures 12 to 15 are diagrams showing the movement state of the rotor and the intermediate electric wire of Figure 11, Figure 16 is an enlarged perspective view of the rotor of Figure 12, and Figure 17 is a perspective view of the first rotor part of Figure 16.

<Regarding the power supply structure for a sliding seat 1 and the wire harness 2>
1, the power supply structure for a sliding seat 1 is a structure for supplying power and transmitting signals to a sliding seat 3 of a vehicle such as an automobile using a wire harness 2. The power supply structure for a sliding seat 1 and the wire harness 2 are provided for electrically connecting a power source and an ECU (electronic control unit) mounted on the vehicle to electronic devices and various sensors provided on the sliding seat 3.

In this embodiment, the sliding seat 3 refers to a seat that is arranged on the floor 4 of the vehicle interior and moves in the vehicle's overall length. The sliding seat 3 refers to a seat arranged in the third row counting from the front of the vehicle's overall length, i.e., a third seat. Although not shown, the sliding seat 3 can be folded up and stored toward the side wall panel 6 that constitutes the vehicle's side wall 5. The vehicle is not limited to automobiles, and may be, for example, a train, as long as the sliding seat 3 slides along the side wall panel 6. In FIG. 1, the sliding seat 3 shown by the solid line is in the rearmost position (the position when pulled all the way back), and the sliding seat 3 shown by the two-dot chain line is in the state of movement to the frontmost position (the position when pulled all the way forward).

In Fig. 1 and Fig. 2, the main structural part 7 of the power supply structure for a sliding seat 1 is disposed on the side wall panel 6 of the side wall 5. The main structural part 7 is also the main structural part 7 of the wire harness 2. In Fig. 2, a rail 8 is provided on the side wall panel 6. The rail 8 is formed so as to extend straight in the overall length direction of the vehicle. A slider 9 is provided on the rail 8 so as to be able to slide freely. The slider 9 is connected to the sliding seat 3 (see Fig. 1). The slider 9 moves in the overall length direction in a state in which it accompanies the sliding seat 3. The slider 9 is formed with a part for drawing out the downstream electric wire intermediate 15 (described later with reference to Fig. 9) that is arranged on the sliding seat 3 (reference numerals omitted, see Fig. 2).

In FIG. 2, a guide opening 10 is formed in the side wall panel 6. The guide opening 10 on the side wall panel 6 side is formed in a long and narrow opening along the overall length of the vehicle. At the position of the guide opening 10 on the side wall panel 6 side (on the back side of the side wall panel 6), as shown in FIG. 3, the main structural parts 7 of the power supply structure for a sliding seat 1 and the wire harness 2 are provided. The main structural parts 7 will be described below.

<Regarding the main structural portion 7 of the power supply structure 1 for a sliding seat and the wire harness 2>
4 and 11, the main structural portion 7 of the power supply structure 1 for a sliding seat and the wire harness 2 is configured to include electric wires 11 routed from the power source and ECU (electronic control unit) to the sliding seat 3, and a protector device 12 for causing the electric wires 11 to follow the movement of the sliding seat 3 in the above-mentioned overall length direction. The side of the main structural portion 7 visible in FIG. 4 is fixed to the back surface of the side wall panel 6.

<Regarding Electric Wire 11>
In Fig. 4, Fig. 5, and Fig. 9, the electric wire 11 is configured so as to be able to supply power to the slide sheet 3 (see Fig. 1). The electric wire 11 in this embodiment is formed so as to be collectively covered with a sheath (this is an example). The electric wire 11 has flexibility, and is adapted to have a shape such as a 90-degree bend or a sagging shape due to its own weight. The protector device 12 is disposed in the electric wire intermediate portion 13, which is the middle of the electric wire 11. With regard to the electric wire intermediate portion 13, the upstream side of the protector device 12 (the side where the power source and the like are present) is referred to as the upstream electric wire intermediate portion 14. Also, the downstream side of the protector device 12 (the side where the slide sheet 3 is arranged) is referred to as the downstream electric wire intermediate portion 15. The upstream electric wire intermediate portion 14 and the downstream electric wire intermediate portion 15 are fixed at the position where they are pulled out from the protector device 12, for example, using a cable tie or the like. 8 and 15 is secured within the protector device 12. The length of the intermediate wire 13 within the protector device 12 is significantly shorter than that of Patent Document 1 (the protector device 12 is smaller in size than that of Patent Document 1).

<Regarding the protector device 12>
4 and 11, the protector device 12 is disposed in the wire middle 13 so that the wire 11 follows the movement of the sliding sheet 3 (see FIG. 1) in the above-mentioned full length direction. The protector device 12 is fixed to the back surface of the side wall panel 6 (see FIG. 3). The protector device 12 is also fixed in accordance with the position of the guide opening 10 on the side wall panel 6 side. Such a protector device 12 is configured to include a protector body 16 made of resin and a rotor 17 also made of resin.

<Regarding the protector body 16>
4, 5, 11, and 12, the protector body 16 is configured to include a protector base 18 and a protector cover 19 that fits onto the protector base 18. The protector body 16 thus configured is formed into the illustrated shape, having a rotor slide portion 20, an electric wire housing portion 21, and a panel fixing portion (not shown).

The rotor slide section 20 is formed in a portion where the rotor 17 can slide freely in the full length direction while "swinging" as described later. To explain in more detail, the rotor slide section 20 is formed such that a guide opening 22 is formed on the protector base 18 side, and a second guide opening 23 is formed on the protector cover 19 side, and the rotor 17 slides in the full length direction while "swinging" by these guide openings 22 and second guide opening 23. The guide opening 22 is formed in a portion that opens elongatedly along the full length direction. The guide opening 22 is positioned to match the position of the guide opening 10 (see FIG. 2) on the side wall panel 6 side. The second guide opening 23 is formed in a portion that opens elongatedly along the full length direction like the guide opening 22. The second guide opening 23 is positioned opposite the guide opening 22. The guide opening 22 and the second guide opening 23 are formed to open in accordance with the sliding amount (length, distance) of the slide sheet 3 (see FIG. 1).

The above "oscillation" refers to the manner in which the rotor 17 moves in the rotational direction around the axis CL. In other words, the manner in which the rotor 17 moves as shown in Figures 5 to 8 and Figures 12 to 15 is called "oscillation." The axis CL is an axis that extends straight from the side wall 5 (see Figure 1) toward the seat side portion 33 of the sliding seat 3 (see Figure 1), and the direction in which this axis CL extends is perpendicular to the overall length direction and the up-down direction.

The electric wire housing 21 is formed in a portion that houses the electric wire intermediate 13. Such an electric wire housing 21 is disposed on the floor 4 (see FIG. 1) side of the rotor slide portion 20. It is also possible to dispose the electric wire housing 21 on the upper side of the rotor slide portion 20, but in this case, for example, a spring part or the like is required to prevent the housed electric wire intermediate 13 from sagging due to its own weight, so the structure of this embodiment is of course preferable. The electric wire housing 21 is formed in a generally V-shape in side view that is convex toward the floor 4 side. Since the electric wire housing 21 is generally V-shaped in side view that is convex toward the floor 4 side, as shown in FIG. 6 and FIG. 13, the housed state of the electric wire intermediate 13 can be improved. In addition, the housed state of the electric wire intermediate 13 can be stabilized. A bend restricting portion 24 is formed on the protector base 18 side of the electric wire housing 21. The bend restricting portion 24 is formed in the illustrated shape as a portion that restricts the bend shape of the wire intermediate portion 13 when the diameter of the wire intermediate portion 13 is reduced (see FIG. 12). The bend restricting portion 24 may be formed on the protector cover 19 side. The reference symbol 25 in the wire housing portion 21 indicates a wire outlet. The wire intermediate portion 14 is pulled out from the wire outlet 25.

<Regarding rotor 17>
4 to 17, the rotor 17 is attached to the electric wire intermediate portion 13 closer to the downstream electric wire intermediate portion 15 in such a state that the electric wire intermediate portion 13 is bent 90 degrees. The rotor 17 is configured to include a first rotor part 26 and a second rotor part 27 that fit together. The first rotor part 26 is formed into the illustrated shape having a first tubular portion 28 and a lid portion 29. The first tubular portion 28 is formed into a cylindrical shape. The electric wire intermediate portion 13 is inserted into the first tubular portion 28. The first tubular portion 28 is formed so as to be inserted into the guide opening 22 and guided slidably and rotatably in the above-mentioned overall length direction. The lid portion 29 is formed in a portion that covers a housing portion 30 of the second rotor part 27, which will be described later.

The second rotor part 27 is formed in the illustrated shape and has a storage section 30 and a second tubular section 31. The storage section 30 has an electric wire pull-out section 32. The storage section 30 is formed in a generally groove-shaped (approximately box-shaped) section that stores the electric wire intermediate section 13 so that it is pulled out from the electric wire pull-out section 32. The second tubular section 31 is formed to be inserted into the second guide opening 23 and guided so as to be slidable and rotatable in the overall length direction.

<Movement of the rotor 17 and the wire intermediate portion 13>
The following describes the movement state of the rotor 17 and the wire intermediate portion 13 when the slide sheet 3 is moved from its rearmost position (the position when pulled all the way back) to its frontmost position (the position when pulled all the way forward) as shown in FIG. 1.

First, in the first moving position, the rotor 17 is in the state shown in Figures 4, 5, 11, and 12. That is, the rotor 17 is in a state in which the first tubular portion 28 and the second tubular portion 31 are located at the rear ends of the guide opening 22 and the second guide opening 23, and the cover portion 29 and the storage portion 30 are in a state in which the electric wire pull-out portion 32 faces the front ends of the guide opening 22 and the second guide opening 23. At this time, the bending state of the electric wire middle portion 13 is restricted by the bending restriction portion 24.

Next, in the second movement position, the rotor 17 is in the state shown in Figures 6 and 13. That is, the rotor 17 slides and rotates at the same time, so that the wire pull-out section 32 faces diagonally downward. At this time, the wire middle section 13 is bent so as to come into contact with the slope of the wire housing section 21.

Next, in the third movement position, the rotor 17 is in the state shown in Figures 7 and 14. That is, the rotor 17 slides and rotates at the same time, so that the wire pull-out portion 32 faces downward. At this time, the wire middle portion 13 is bent and raised above the inclined surface of the wire housing portion 21.

Finally, in the fourth movement position, the rotor 17 is in the state shown in Figures 8 and 15. That is, the rotor 17 slides and rotates at the same time, so that the first tubular portion 28 and the second tubular portion 31 are positioned at the front ends of the guide opening 22 and the second guide opening 23. At this time, the wire middle portion 13 extends diagonally and almost straight.

Note that when the slide seat 3 is moved from the frontmost position to the rearmost position, the above process is reversed, so a detailed explanation will be omitted here.

<About the effects>
As described above with reference to Figs. 1 to 17, the power supply structure for a sliding seat 1 and the wire harness 2 according to an embodiment of the present invention can supply power to the sliding seat 3 (third seat). In addition, the power supply structure for a sliding seat 1 and the wire harness 2 can prevent the protector device 12 from being stepped on by an occupant because the main structural part 7 is disposed on the side wall panel 6 of the side wall 5. If the protector device 12 can be prevented from being stepped on by an occupant, it is not necessary to provide the protector device 12 with the conventional rigidity, and therefore the size of the protector device 12 can be prevented from being increased. In addition, as can be seen from the above description of the moving state and the illustrated shape, the protector device 12 can be made smaller than the conventional one.

Of course, the present invention can be modified in various ways without departing from the spirit of the invention.

REFERENCE SIGNS LIST 1...power supply structure for sliding seat, 2...wire harness, 3...sliding seat, 4...floor, 5...side wall, 6...side wall panel, 7...main structural portion, 8...slider, 10...guide opening, 11...electric wire, 12...protector device, 13...intermediate wire, 14...upstream intermediate wire, 15...downstream intermediate wire, 16...protector body, 17...rotor, 18...protector base, 19...protector cover, 20...rotor slide portion, 21...electric wire accommodating portion, 22...guide opening, 23...second guide opening, 24...bending restriction portion, 25...electric wire outlet, 26...first rotor part, 27...second rotor part, 28...first tubular portion, 29...lid portion, 30...accommodating portion, 31...second tubular portion, 32: Electric wire pull-out portion; 33: Sheet side portion; CL: Shaft

Claims (7)

a protector device for causing the electric wire to follow the movement of the sliding seat in the full-length direction of the vehicle, the protector device including: an electric wire for supplying electric power to the sliding seat that is disposed on the floor and moves in the full-length direction of the vehicle;
the protector device is disposed on the side wall such that the electric wire is routed from the side wall of the vehicle toward a seat side portion of the sliding seat,
Furthermore, the protector device includes a protector body that accommodates a middle portion of the electric wire, and a rotor that is provided in the middle portion of the electric wire, the protector body has a guide opening that is elongated along the entire length direction and a second guide opening that is elongated along the entire length direction , the rotor is formed in a shape that bends the middle portion of the electric wire at a position where the rotor is arranged by approximately 90 degrees, and is formed in a shape that is slidable in the entire length direction by being guided by at least one of the guide opening and the second guide opening, and is formed in a shape that is rotatable around an axis extending from the side wall toward the side portion of the seat by at least one of the guide opening and the second guide opening. The power supply structure for a sliding seat according to claim 1,
The slide seat is disposed in a third row counting from the front in the overall length direction of the vehicle. The power supply structure for a sliding seat according to claim 1 or 2,
The protector body has the second guide opening formed at a position opposite to the guide opening.
A power supply structure for a slide sheet. The power supply structure for a sliding seat according to claim 3,
the protector body is formed with an electric wire accommodating portion for accommodating an intermediate portion of the electric wire at a position closer to the floor than the position of the guide opening. The power supply structure for a sliding seat according to claim 4,
The power supply structure for a sliding seat, wherein the electric wire accommodating portion is formed in a generally V-shape in a side view so as to be convex toward the floor side. The power supply structure for a sliding seat according to claim 5,
The power supply structure for a slide seat, wherein a bending restriction portion is formed in the electric wire accommodating portion to restrict a bending shape of a middle portion of the electric wire when the diameter of the wire is reduced. a protector device for causing the electric wire to follow the movement of the sliding seat in the overall length direction of the vehicle, the protector device being configured so that it can be disposed and fixed to a side wall of the vehicle, and also configured so that the electric wire can be routed from the side wall toward a seat side portion of the sliding seat,
the protector device further comprises a protector body that accommodates a middle portion of the electric wire, and a rotor that is provided in the middle portion of the electric wire, the protector body being formed with a guide opening that is elongated along the overall length direction and a second guide opening that is elongated along the overall length direction , the rotor being formed in a shape that bends the middle portion of the electric wire at a position where the rotor is disposed by approximately 90 degrees, and is formed in a shape that is slidable in the overall length direction by being guided by at least one of the guide opening and the second guide opening, and is formed in a shape that is rotatable around an axis extending from the side wall toward the side portion of the seat by at least one of the guide opening and the second guide opening.

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