Extra length absorbing device of wiring member

Abstract

To reduce sliding resistance when a wiring member enters into an extra length absorbing housing.SOLUTION: An extra length absorbing device 50 of a wiring member 40 for absorbing an extra length of the wiring member having an internal support part 44 comprises: an extra length absorbing case 52 for storing an extra length part 41R generated due to the extra length out of the wiring member; and an energization unit 60 for energizing the extra length part inside the extra length absorbing case. The extra length absorbing case comprises a support part 59 for supporting the internal support part, and a peripheral wall 54 surrounding the support part with a space at a distance. The peripheral wall comprises a gateway 54G for the wiring member. The extra length part arranged inside the extra length absorbing case by passing through the gateway, out of the wiring member is a part spirally formed around the support part. The energization unit comprises a rigid body 62 located on an outer peripheral side of the extra length part, and an energization part 70 for energizing the rigid body onto an outer peripheral face of the extra length part.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a wiring member slack take-up device. [Background technology]

[0002] Patent Document 1 discloses a wire harness routing device having an excess length storage section having an entrance through which an excess length of a wire harness is introduced and storing the excess length in a spiral shape, and a guide section arranged in the excess length storage section and contacting the excess length to change the direction in which the excess length enters the excess length storage section to the inside of the excess length storage section. In Patent Document 1, the guide section has a metallic leaf spring-shaped elastic member, and the radially inner side surface of the storage section main body of the elastic member is a contact section that comes into contact with the wire harness. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-44960 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for reducing the sliding resistance when the slack portion of the wire harness enters the slack absorbing portion.

[0005] Therefore, an object of the present disclosure is to reduce the sliding resistance when a wiring member enters a slack absorbing housing. [Means for solving the problem]

[0006] The wiring member slack absorption device disclosed herein is a wiring member slack absorption device that absorbs slack in a wiring member having an internal support part, and comprises: an slack absorption case that houses an slack portion of the wiring member generated by the slack; and a biasing unit that biases the slack portion within the slack absorption case, wherein the slack absorption case includes a support part that supports the internal support part and a peripheral wall that surrounds the support part at a distance, the peripheral wall having an entrance / exit for the wiring member, the slack portion being a part of the wiring member that is disposed within the slack absorption case through the entrance and forms a spiral around the support part, and the biasing unit includes a rigid body located on the outer periphery of the slack portion, and a biasing member that biases the rigid body against the outer periphery of the slack portion. Effect of the Invention

[0007] According to the present disclosure, it is possible to reduce the sliding resistance when the wiring member enters the slack absorbing housing. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a slide sheet and an excess length taking up device according to the first embodiment. [Diagram 2] FIG. 2 is a plan view showing the slack take-up device when the slide sheet is positioned toward the rear. [Diagram 3] FIG. 3 is a plan view showing the slack take-up device when the slide sheet is positioned toward the front. [Figure 4] FIG. 4 is a perspective view showing a slack take-up device. [Diagram 5] FIG. 5 is a perspective view showing a slack take-up device. [Figure 6] FIG. 6 is a plan view showing the slack take-up device. [Figure 7] FIG. 7 is a partially exploded perspective view of the slack take-up device. [Figure 8] FIG. 8 is a plan view showing the slack take-up device. [Figure 9] FIG. 9 is an explanatory view showing the slack taking up operation of the slack taking up device according to the reference example. [Figure 10] FIG. 10 is a plan view showing a slack taking up device according to a modified example. [Figure 11] FIG. 11 is a plan view showing the slack take-up device. [Figure 12] FIG. 12 is a perspective view showing a slack taking up device according to the second embodiment. [Figure 13] FIG. 13 is an exploded perspective view showing the slack taking up device. [Figure 14] FIG. 14 is a plan view showing the slack take-up device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described.

[0010] The slack take-up device for a wiring member according to the present disclosure is as follows.

[0011] (1) A wiring member slack absorption device that absorbs excess length of a wiring member having an internal support portion, comprising: an excess length absorption case that houses an excess portion of the wiring member generated by the excess length; and a biasing unit that biases the excess portion within the excess length absorption case, wherein the excess length absorption case includes a support portion that supports the internal support portion and a peripheral wall that surrounds the support portion at a distance, the peripheral wall having an entrance / exit for the wiring member, the excess portion being a portion of the wiring member that is disposed within the excess length absorption case through the entrance and forms a spiral around the support portion, and the biasing unit includes a rigid body located on the outer periphery of the excess portion, and a biasing member that biases the rigid body against the outer periphery of the excess portion.

[0012] According to this slack absorbing device, when the wiring member enters the slack absorbing case through the entrance, the rigid body presses the outer peripheral surface of the spiral slack portion. This makes it easy to secure a gap between the outer peripheral surface of the spiral slack portion and the peripheral wall. The spiral slack portion can be smoothly deformed to increase its diameter by utilizing the gap, and the slack of the wiring member is smoothly absorbed in the slack absorbing case. In addition, since the rigid body is pressed against the outer peripheral surface of the spiral slack portion, the contact state between the slack portion and the rigid body is stable, and the contact area between the two can be kept small. This makes it possible to reduce the sliding resistance when the wiring member enters the slack absorbing housing.

[0013] (2) In the wiring member slack absorption device of (1), the biasing unit may be disposed in a plurality of positions dispersed in a circumferential direction of the outer peripheral surface of the slack portion.

[0014] In this case, the multiple rigid bodies can bias the outer peripheral surface of the excess length portion at positions that are dispersed and spaced apart in the circumferential direction of the outer peripheral surface of the excess length portion, thereby making it possible to control the position at which the excess length portion forms a spiral at multiple positions on the outer peripheral side.

[0015] (3) In the device for absorbing excess length of a wiring member of (1) or (2), the rigid body may include an inlet-facing rigid body that is arranged at a position opposite the entrance and guides the portion of the wiring member that enters through the entrance from an extension line of the entrance toward the support portion.

[0016] In this case, it is possible to delay the increase in diameter of the excess length near the point where the wiring member enters through the entrance, thereby delaying the timing at which the excess length is pressed against the peripheral wall or the like with a strong force in the portion facing the entrance.

[0017] (4) A wiring member slack absorption device according to any one of (1) to (3), wherein the rigid body is a long member supported so as to be swingable around a pivot shaft portion located on the outer periphery of the slack portion, and the biasing member may include a torsion spring that biases the long member toward the outer periphery of the slack portion by pivoting the long member around the pivot shaft portion.

[0018] This allows the long member to be biased toward the outer circumferential surface of the excess length portion by an inexpensive torsion spring.

[0019] (5) In the wiring member slack absorption device of (4), the central axis of the oscillating shaft portion may be parallel to the axis of the spiral formed by the slack portion, and the elongated member may include a pressing surface that is concave on the side of the slack portion when viewed along the oscillating shaft portion.

[0020] In this case, the diameter of the excess length portion can be made larger by utilizing the recess on the pressing surface on the side of the excess length portion, thereby making it possible to increase the length of excess length absorption by the excess length portion.

[0021] (6) A device for absorbing excess wiring length according to any one of (1) to (3), wherein the rigid body is supported on an outer circumferential side of the excess portion so as to be movable toward and away from the support portion, and the biasing member may include a compression coil spring that biases the rigid body toward the outer circumferential surface of the excess portion.

[0022] This allows the rigid body to be biased toward the outer circumferential surface of the excess length portion by an inexpensive compression coil spring.

[0023] (7) In the wiring member slack take-up device of (6), the biasing member may include a plurality of the compression coil springs.

[0024] In this way, the rigid body is biased by a plurality of compression coil springs, so that the rigid body can move in a stable posture.

[0025] (8) In the wiring member slack absorption device of (6) or (7), the rigid body may include a pressing surface that is concave on the side of the slack portion when viewed along the axis of the spiral formed by the slack portion.

[0026] In this case, the diameter of the excess length portion can be made larger by utilizing the recess on the pressing surface on the side of the excess length portion, thereby making it possible to increase the length of excess length absorption by the excess length portion.

[0027] (9) In the wiring member slack absorption device of (8), the pressing surface may include a straight surface located at the middle of the pressing surface, and a pair of arcuate surfaces located on both sides of the straight surface.

[0028] As a result, the straight surface comes into contact with the outer peripheral surface of the excess length portion, thereby reducing the contact area between the excess length portion and the pressing surface, and the excess length portion can be smoothly deformed to increase in diameter. Also, the recess formed by the pair of arcuate surfaces can be used to make the excess length portion have a large diameter. This allows the excess length absorption length to be increased.

[0029] (10) In the device for absorbing excess length of a wiring member according to any one of (1) to (9), a protrusion extending in a circumferential direction of the excess length may be formed on a surface of the rigid body that contacts the excess length.

[0030] If a protrusion extending along the circumferential direction of the excess length portion is formed on the rigid body, when the wiring member comes into contact with the pressing surface, it can smoothly come into contact with and slide against the pressing surface.

[0031] [Details of the embodiment of the present disclosure] Specific examples of the wiring member slack take-up device of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0032] [Embodiment 1] Hereinafter, a description will be given of a wiring member slack absorbing device according to embodiment 1. In this embodiment, an example will be described in which the slack absorbing device absorbs slack of a wiring member between a vehicle body and a sliding seat.

[0033] <Prerequisite configuration> An example of a support structure for the sliding sheet 20 and an example of a guide structure for the wiring member 40 will be described. Fig. 1 is a perspective view showing the sliding sheet 20 mounted on the vehicle body 10 and the slack absorbing device 50. Fig. 2 is a plan view showing the slack absorbing device 50 when the sliding sheet 20 is positioned toward the rear. Fig. 3 is a plan view showing the slack absorbing device 50 when the sliding sheet 20 is positioned toward the front. Note that the cover 51 of the slack absorbing device 50 is omitted in Figs. 2 and 3.

[0034] The slack absorbing device 50 according to this embodiment is a device for absorbing slack generated in a wiring member 40 that is wired between a first component and a second component that moves relatively with respect to the first component in a vehicle (not shown) such as an automobile. In other words, when the wiring member 40 is wired between the first component and the second component, the length of the wiring member 40 is set to a size assuming a state in which the wiring fixing point in the first component and the wiring fixing point in the second component are the farthest apart. For this reason, when the two wiring fixing points are close to each other, slack, i.e., slack, may occur in the wiring member 40. The slack absorbing device 50 is a device for absorbing the slack.

[0035] Here, an example will be described in which the combination of the first part and the second part is the vehicle body 10 and the sliding seat 20. The combination of the first part and the second part may be something other than the vehicle body 10 and the sliding seat 20, for example, the combination may be a vehicle body and a sliding door.

[0036] The slide seat 20 is supported movably on the vehicle body 10 as follows. That is, seat rails 12, 13 are supported on the floor of the vehicle body 10. Each of the seat rails 12, 13 is a long and narrow rail extending in the front-rear direction. The seat rails 12, 13 are arranged in parallel and spaced apart in the left-right direction.

[0037] The sliding seat 20 is supported slidably on the floor of the vehicle body 10 via the seat rails 12, 13. For example, the lower part of the sliding seat 20 is fixed to a seat slider that moves along the seat rails 12, 13. The seat slider moves back and forth while being guided by the seat rails 12, 13, thereby enabling the sliding seat 20 to move back and forth in the front-rear direction.

[0038] The sliding seat 20 is provided with electrical equipment. Such electrical equipment is not particularly limited, and may be, for example, an electric reclining device, a seat heater, a sensor for detecting whether an occupant is seated, a sensor for detecting whether a seat belt is fastened, etc. The electrical equipment of the seat may be one type, or two or more types.

[0039] In this embodiment, for convenience of explanation, up and down, front and rear, and left and right may be mentioned. In this case, the side where the slide seat 20 is located with respect to the seat rails 12 and 13 is the upper side, and the side where the seat rails 12 and 13 are located with respect to the slide seat 20 is the lower side. The extending direction of the seat rails 12 and 13 is the front-rear direction, and in this embodiment, the side where the slack absorbing device 50 is located with respect to the seat rails 12 and 13 is the front, and the opposite side is the rear. In addition, left and right are defined based on the above up and down and front and rear. In addition, the slack absorbing device 50 can be installed in various positions regardless of the up and down, front and rear, and left and right positional relationships described in this embodiment.

[0040] The wiring member 40 connects the electrical components of the slide seat 20 to electrical devices of the vehicle body 10. The electrical devices of the vehicle body are not particularly limited, and may be, for example, a battery or an electronic control unit (ECU).

[0041] The wiring member 40 is a bendable wiring member that includes at least one conductive wire. The wiring member 40 may be routed to bend primarily in one plane.

[0042] For example, the wiring member 40 may include at least one coated electric wire and a connecting guide member to which a plurality of links are connected so as to be aligned in a row. Each of the plurality of links may be a frame-shaped member through which at least one coated electric wire can be inserted, and adjacent links may be connected to each other so as to be rotatable mainly around one axis. Adjacent links may be rotatably connected to each other by a thin hinge, or may be rotatably connected to each other by a fitting structure between a shaft portion and a bearing. If the rotation axes between adjacent links are aligned in the same direction, the connecting guide member is path-regulated so as to bend mainly on one plane perpendicular to the rotation axis. At least one coated electric wire is inserted into the connecting guide member and guided, so that the path of at least one coated electric wire is regulated so as to bend mainly on one plane. Such a connecting guide member may be a part called a cable chain, a cable carrier, or a cableveyor (registered trademark).

[0043] If each link member is formed in a flat frame shape, for example, a flat rectangular frame shape, the multiple coated electric wires can be bundled in a flat shape that can be easily bent in the thickness direction of the flat shape.

[0044] The wiring member 40, the path of which is restricted so as to bend mainly on one plane, may not have the above configuration. For example, the wiring member 40 may be a belt-shaped wiring material, for example, a belt-shaped wiring material obtained by welding coated electric wires in parallel to a belt-shaped resin sheet such as a nonwoven sheet, an FFC (Flexible Flat Cable) or an FPC (Flexible Printed Circuits).

[0045] The wiring member 40 does not have to be route-regulated so as to bend mainly on one plane. The wiring member 40 may be configured in such a manner that a plurality of coated electric wires are held in a bundled state by a corrugated tube. The wiring member 40 may be configured in such a manner that a plurality of coated electric wires are bundled in a circular cross-section by an adhesive tape, a cable tie, or the like.

[0046] In this embodiment, the wiring member 40 has a flat band shape and can bend mainly in its thickness direction. In other words, the wiring member 40 is regulated in its path so as to bend mainly on a plane perpendicular to the width direction of the flat band.

[0047] The wiring member 40 may be guided by a wiring guide unit 30 arranged parallel to the seat rails 12, 13 so as to be guided in the front-rear direction in conjunction with the front-rear movement of the sliding seat 20.

[0048] In this embodiment, the wiring guide unit 30 includes a guide portion 32 and a slider 38 .

[0049] An elongated guide space 32P extending in the front-rear direction is formed in the guide portion 32. The cross-sectional shape of the guide space 32P (the shape of a cross section perpendicular to the longitudinal direction) is larger than the cross-sectional shape of the wiring member 40. By being inserted into the guide space 32P, the wiring member 40 can move forward and backward in a constant posture in conjunction with the forward and backward movement of the slide sheet 20.

[0050] For example, the wiring member 40 is inserted into the guide space 32P with its width direction aligned along the up-down direction. This allows the wiring member 40 to move in the front-rear direction within the guide space 32P with its width direction aligned along the up-down direction.

[0051] The slider 38 is supported by the guide portion 32. The slider 38 is capable of reciprocating between a first position P1 and a second position P2. The first position P1 is the position of the slider 38 when the sliding seat 20 is located near the rear ends of the seat rails 12, 13. The second position P2 is the position of the slider 38 when the sliding seat 20 is located near the front ends of the seat rails 12, 13.

[0052] The lower end of the slider 38 is movably supported by the guide portion 32 , and the upper end of the slider 38 protrudes above the guide portion 32 .

[0053] One end of the wiring member 40 is connected to the slider 38 within the guide space 32P. The middle portion of the wiring member 40 passes through the guide space 32P and is introduced from an entrance of the guide part 32. In this embodiment, the entrance is located at the front end of the guide part 32.

[0054] An extension wiring member, for example, a coated electric wire, extending from one end of the wiring member 40 is led from the lower end of the slider 38 through the slider 38 to the upper end of the slider 38, extends from the upper end of the slider 38 and is connected to the electrical equipment of the slide seat 20.

[0055] As the slider 38 moves back and forth, one end of the wiring member 40 moves back and forth within the guide space 32P. As one end of the wiring member 40 moves back and forth within the guide space 32P, a portion of the wiring member 40 close to the slider 38 moves back and forth within the guide space 32P along the guide space 32P. When the slider 38 is located at the second position P2 close to the entrance, the length of the wiring member 40 that can be accommodated within the guide space 32P is shorter than the length of the wiring member 40 that can be accommodated within the guide space 32P when the slider 38 is located at the first position P1 far from the entrance. Therefore, when the slider 38 moves from the first position P1 to the second position P2, the wiring member 40 of a difference length obtained by subtracting the former length from the latter length is pushed out from the entrance of the guide part 32. Conversely, when the slider 38 moves from the second position P2 to the first position P1, the wiring member 40 of the difference length is pulled into the guide part 32 from outside the entrance of the guide part 32.

[0056] The slack absorbing device 50 of the wiring member 40 is disposed at a position facing the entrance of the guide portion 32. The portion of the wiring member 40 pushed out from the entrance of the guide portion 32 can be pushed into the slack absorbing device 50. The portion of the wiring member 40 that was pushed into the slack absorbing device 50 can be pulled into the guide portion 32.

[0057] <Wiring component excess length absorption device> The slack absorbing device 50 for the wiring member 40 will be described in more detail. Figures 4 and 5 are perspective views showing the slack absorbing device 50. Figure 6 is a plan view showing the slack absorbing device 50. Figure 7 is a partially exploded perspective view of the slack absorbing device 50.

[0058] The slack taking up device 50 includes a slack taking up case 52 and a biasing unit 60 .

[0059] The portion of the wiring member 40 protruding from the entrance of the guide portion 32 is accommodated in the slack absorbing case 52 as the slack portion 41R. A part of the extending direction of the slack portion 41R is accommodated in the slack absorbing case 52 and is supported at a fixed position by a support portion 59 away from the entrance of the guide portion 32. The portion of the slack portion 41R supported at a fixed position by the support portion 59 is the internal support portion 44. The internal support portion 44 may be, for example, an end portion of the connecting guide member opposite the end connected to the slider 38.

[0060] The slack absorbing case 52 is a case that houses the slack portion 41R of the wiring member 40 that protrudes from the entrance of the guide portion 32. More specifically, the slack absorbing case 52 includes a bottom portion 53, a peripheral wall 54, and a support portion 59. The slack absorbing case 52 may be, for example, a resin molded product.

[0061] The bottom portion 53 is formed in a plate shape, here in a shape in which a rectangular plate portion is connected to a semicircular plate portion.

[0062] The support portion 59 is located inside the outer peripheral edge of the bottom portion 53. More specifically, the support portion 59 is located at the center of curvature of the arc-shaped edge of the semicircular plate-shaped portion of the bottom portion 53. The support portion 59 is tubular and protrudes from one main surface of the bottom portion 53, and a slit 59S is formed in a part of the circumferential direction. The internal support portion 44 of the wiring member 40 is sandwiched between the slit 59S, so that the internal support portion 44 is supported at a fixed position by the support portion 59. Preferably, a convex portion is formed on one of the inner surface of the slit 59S and the internal support portion 44, and a concave portion into which the convex portion fits is formed on the other. In this case, the convex portion fits into the concave portion, so that the internal support portion 44 is more reliably supported at a fixed position by the support portion 59.

[0063] An opening 53h1 is formed in a portion of the bottom 53 that is surrounded by the internal support portion 44. The wiring 41 extending from the internal support portion 44 of the wiring member 40 is led to the outside through the opening 53h1.

[0064] An opening for work 53h2 may be formed in an area of ​​the bottom 53 adjacent to the opening for drawer 53h1. The opening for work 53h2 is preferably larger than the opening for drawer 53h1. The opening for drawer 53h1 and the opening for work 53h2 may be connected via a narrow slit 53f2s through which the wiring for drawer 41 can pass. In this case, after the connector at the tip of the wiring for drawer 41 is passed through the opening for work 53h2, the wiring for drawer 41 can be disposed in the opening for drawer 53h1 through the slit 53f2s. This allows the wiring member 40 to be easily incorporated into the slack absorbing case 52.

[0065] The peripheral wall 54 protrudes from the outer periphery of the bottom portion 53 toward one main surface of the bottom portion 53, and surrounds the support portion 59 with a gap therebetween.

[0066] An entrance 54G for the wiring member 40 is formed in the peripheral wall 54. The wiring member 40 is pushed into the slack absorbing case 52 or pulled out from the slack absorbing case 52 through the entrance 54G. Since a gap is formed between the support portion 59 and the peripheral wall 54, the part of the wiring member 40 that is accommodated in the slack absorbing case 52 through the entrance 54G can draw a spiral around the support portion 59. The part of the wiring member 40 that is accommodated in the slack absorbing case 52 and forms a spiral around the support portion 59 is the slack portion 41R. The length of the slack portion 41R varies depending on the position of the slider 38. If the slider 38 is located at a position P2 close to the slack absorbing case 52, the slack portion 41R is long. If the slider 38 is located at a position P2 far from the slack absorbing case 52, the slack portion 41R is short.

[0067] In the present embodiment, the peripheral wall 54 includes a first wall portion 55, a second wall portion 56, a third wall portion 57, and an arc-shaped wall portion 58.

[0068] The first wall portion 55 is formed in a rectangular plate shape extending along the edge of the square plate portion of the bottom portion 53 opposite to the semicircular plate portion.

[0069] The second wall portion 56 and the third wall portion 57 extend along two edges of the rectangular plate-shaped portion of the bottom portion 53 that are adjacent to the semicircular plate-shaped portion.

[0070] The second wall portion 56 is formed in a rectangular plate shape, and is continuous with one end of the first wall portion 55. The first wall portion 55 and the second wall portion 56 are erected along edges sandwiching one corner of the rectangular plate portion of the bottom portion 53 on the side opposite to the semicircular plate portion.

[0071] The third wall portion 57 includes an arc-shaped surface 57f facing the support portion 59. The arc-shaped surface 57f is formed along an arc centered on the central axis of the support portion 59. A gap through which the wiring member 40 can pass is formed between the other end of the first wall portion 55 and the third wall portion 57, and the gap serves as an entrance / exit 54G.

[0072] The inner surface of the other end of the first wall portion 55 forms a part of the inner circumferential surface of the entrance 54G. The surface of the third wall portion 57 facing the other end of the first wall portion 55 faces the inner surface of the other end of the first wall portion 55 with a gap therebetween. A groove through which the wiring member 40 can pass is formed between the first wall portion 55 and the third wall portion 57. The wiring member 40 pushed out of the guide portion 32 passes through the entrance 54G and is pushed into the slack absorption case 52 while maintaining the same posture as in the guide portion 32.

[0073] The arc-shaped wall portion 58 is formed in a plate shape extending along an arc-shaped edge of the semicircular plate portion of the bottom portion 53 on the opposite side to the rectangular plate portion. In other words, the arc-shaped wall portion 58 is shaped in such a way that a rectangular plate portion is bent into a semicircular arc. Both ends of the arc-shaped wall portion 58 are connected to the second wall portion 56 or the third wall portion 57 on the opposite side to the first wall portion 55. The inner surface of the arc-shaped wall portion 58 is an arc-shaped surface 58f formed along an arc centered on the central axis of the support portion 59.

[0074] The arcuate surface 57f and the arcuate surface 58f are connected to each other so as to draw about 3 / 4 of a circle.

[0075] The biasing unit 60 biases the excess length portion 41R in the excess length absorbing case 52. The biasing unit 60 includes a rigid body 62 and a biasing member .

[0076] The rigid body 62 may be rigid enough to bias the wiring member 40 while maintaining the initial shape at the contact portion with the wiring member 40. The rigid body 62 may be a rigid body made of resin, metal, or the like.

[0077] The rigid body 62 is located on the outer circumferential side of the excess length portion 41R. The rigid body 62 is supported on the support portion 59 so as to be movable toward and away from the support portion 59.

[0078] More specifically, the rigid body 62 is located at an entrance corner between the first wall portion 55 and the second wall portion 56. The rigid body 62 faces the entrance 54G at the entrance corner.

[0079] The rigid body 62 is a long member supported to be able to swing around the swing shaft 53P1 located on the outer periphery side of the excess length portion 41R. The swing shaft 53P1 is a rod-shaped protrusion protruding into a portion of the bottom portion 53 within the recessed angle portion. The central axis of the swing shaft 53P1 is parallel to the axis of the spiral formed by the excess length portion 41R and also parallel to the central axis of the support portion 59. A hole 62h into which the swing shaft 53P1 fits is formed at the base end of the rigid body 62. The swing shaft 53P1 fits into the hole 62h, so that the base end of the rigid body 62 is supported to be able to swing around the swing shaft 53P1. The rigid body 62 swings around the swing shaft 53P1, so that the portion of the rigid body 62 that is closer to the tip side than the base end can move toward and away from the excess length portion 41R.

[0080] More specifically, the rigid body 62 includes a pressing surface 62f that is recessed toward the excess length portion 41R when viewed along the pivot shaft portion 53P1. The pressing surface 62f may be an arcuate surface, or may be an arcuate surface having the same radius of curvature as the arcuate surfaces 57f and 58f.

[0081] In this embodiment, the rigid body 62 has a rectangular plate-like portion curved in an arc in the thickness direction. The inner peripheral surface of the rigid body 62 is an arc-shaped pressing surface 62f. The arc-shaped surfaces 57f, 58f and the pressing surface 62f may extend along the circumferential direction of a circle centered on the central axis of the support portion 59.

[0082] As described above, the rigid body 62 is disposed at a position facing the entrance 54G. The base end of the rigid body 62 is disposed at a position closer to the entrance 54G than the tip. When the tip of the rigid body 62 is farthest from the support portion 59, the tip of the rigid body 62 is in contact with the second wall portion 56. The posture of the rigid body 62 in this state may be called a separated posture. In this state, the tip of the rigid body 62 is located closer to the support portion 59 side than on the extension line of the entrance 54G. That is, the pressing surface 62f is inclined so as to move away from the extension line of the entrance 54G as it moves away from the entrance 54G.

[0083] By the rigid body 62 swinging around the swing shaft portion 53P1, the tip of the rigid body 62 can approach the support portion 59 (see FIG. 8). When the tip of the rigid body 62 approaches the support portion 59, the rigid body 62 may be nearly perpendicular to the first wall portion 55.

[0084] The state in which the slider 38 is located at the first position P1 is the state in which the length of the excess length portion 41R is the shortest. In this state, the excess length portion 41R is smallest, and the tip of the rigid body 62 is closest to the support portion 59. The posture of the rigid body 62 in this state may be referred to as the closest posture.

[0085] The wiring member 40 passing through the entrance 54G and entering the slack absorbing case 52 curves inwardly while facing the rigid body 62, and is pressed against the pressing surface 62f at a position close to the tip of the rigid body 62. When the wiring member 40 presses the pressing surface 62f, the rigid body 62 can assume a posture inclined from the extension line of the entrance 54G toward the support portion 59 as it moves away from the entrance 54G. Therefore, the wiring member 40 is guided along the pressing surface 62f away from the extension line of the entrance 54G (i.e., the first wall portion 55) toward the support portion 59.

[0086] In this respect, rigid body 62 is an example of an entrance-facing rigid body that is arranged at a position facing entrance 54G and guides the portion of wiring member 40 entering through entrance 54G from the extension line of entrance 54G toward support portion 59.

[0087] The biasing member 70 is a member that biases the rigid body 62 toward the outer peripheral surface of the excess length portion 41R. In this embodiment, the biasing member 70 is a torsion spring that biases the rigid body 62 toward the outer peripheral surface of the excess length portion 41R by swinging the rigid body 62 around the swing shaft portion 53P1. A torsion spring is a torsion coil spring that generates a rotational moment by a repulsive force against a torsion of a coil portion. In this embodiment, the biasing member 70 includes a coil portion 70a, and a first end 70b and a second end 70c that extend radially outward from the coil portion 70a.

[0088] A coil support shaft portion 53P2 protrudes from the bottom portion 53 adjacent to the swing shaft portion 53P1, and the coil support shaft portion 53P2 is inserted into the coil portion 70a. This allows the coil portion 70a of the biasing member 70 to be supported at a fixed position adjacent to the swing shaft portion 53P1. The first end 70b of the biasing member 70 is pressed against the inner surface of the first wall portion 55, and the second end 70c is pressed against the surface of the rigid body 62 opposite to the pressing surface 62f. A groove 62g (see FIG. 7) into which the first end 70b or the second end 70c fits may be formed in the rigid body 62 or the first wall portion 55.

[0089] The biasing member 70 is disposed between the first wall portion 55 and the rigid body 62 in a twisted state so as to bias the first end 70b and the second end 70c in the direction away from each other. Therefore, the biasing member 70 swings the rigid body 62 around the swing shaft portion 53P1, and biases the tip of the rigid body 62 toward the outer circumferential surface of the excess length portion 41R.

[0090] The biasing member 70 may be a leaf spring, rubber, or the like.

[0091] The slack absorbing device 50 may include a lid 51 that closes the opening of the slack absorbing case 52 on the opposite side to the bottom 53 (see FIG. 1).

[0092] <Operation> The operation of the slack absorbing device 50 will be described. When the slider 38 is located at the second position P2 close to the slack absorbing device 50, the length of the slack portion 41R is at its maximum. In this state, the outer diameter of the slack portion 41R is at its maximum, and it spreads widely inside the slack absorbing case 52. For example, the outer peripheral surface of the slack portion 41R spreads along the inner surfaces of the arcuate surfaces 57f, 58f and the pressing surface 62f. The rigid body 62 is pushed outward by the slack portion 41R and is in a separated position.

[0093] Furthermore, when the slider 38 is positioned at the second position P2, the excess portion 41R may expand widely to the point where it contacts the inner surfaces of the arcuate surfaces 57f, 58f, or may expand to a size just short of contacting the inner surfaces.

[0094] From this state, the slider 38 moves toward the first position P1. Then, the wiring member 40 housed in the slack absorbing device 50 is pulled out into the guide portion 32. Then, as shown in FIG. 8, the outer diameter of the slack portion 41R becomes smaller in the slack absorbing device 50. That is, in the slack portion 41R, the number of turns of the wiring member 40 does not change, but the length of each turn becomes shorter. This allows the wiring member 40 of the required length to be fed into the guide portion 32 as the slider 38 moves. In this state, the rigid body 62 is in the closest position.

[0095] When the slider 38 is in the first position P1, the excess portion 41R may be tightly wound around the support portion 59, or may be wound so that there is a gap between each turn.

[0096] When the slider 38 moves from the first position P1 to the second position P2, the wiring member 40 in the guide portion 32 is pushed into the slack absorbing device 50 through the entrance 54G. The pushed wiring member 40 faces the rigid body 62 facing the entrance 54G and pushes the rigid body 62 toward the isolated posture. This causes the rigid body 62 to move from the closest posture toward the isolated posture. At the same time, the wiring member 40 is guided by the pressing surface 62f from the extension line of the entrance 54G toward the support portion 59, while drawing a spiral in the slack absorbing case 52. Therefore, in the initial stage when the wiring member 40 is pushed into the slack absorbing device 50, the wiring member 40 is prevented from suddenly expanding to the maximum outer diameter in the peripheral wall 54 (see the slack portion 41R indicated by the two-dot chain line in FIG. 8).

[0097] Since the rigid body 62 is biased toward the closest position by the biasing member 70, the rigid body 62 can gradually move from the closest position toward the separated position as the wiring member 40 is pushed in. Therefore, the maximum outer diameter of the surplus length portion 41R gradually increases, and can absorb the surplus length of the wiring member 40.

[0098] When the wiring member 40 is housed in the slack absorbing case 52 to the maximum extent, the slack portion 41R expands to the maximum outer diameter and can absorb the slack of the wiring member 40.

[0099] 9 shows, as a reference example, a slack absorbing device 550 without a biasing member 70. In this case, in the initial stage of pushing the wiring member 40 into the slack absorbing device 550, the slack portion 41R may expand to a large outer diameter, and most of the outer circumferential surface of the slack portion 41R may be pressed against the inner circumferential surface of the peripheral wall 554 of the slack absorbing device 550 (see force F1). This increases the frictional force between the outer circumferential surface of the slack portion 41R and the inner circumferential surface of the peripheral wall 554. This increases the force required to push the wiring member 40 toward the slack absorbing device 550, and there is a possibility that the slack of the wiring member 40 may not be pushed into the slack absorbing device 550 well.

[0100] In the present embodiment, the outer peripheral surface of the excess length portion 41R is biased toward the support portion 59 by the rigid body 62, so that the outer diameter of the excess length portion 41R can gradually increase. Therefore, the excess length of the wiring member 40 can be smoothly absorbed.

[0101] <Effects, etc.> According to the slack absorbing device 50 for the wiring member 40 configured as described above, when the wiring member 40 enters the slack absorbing case 52 through the entrance 54G, the rigid body 62 presses the outer peripheral surface of the spiral slack portion 41R. This makes it easy to secure a gap between the outer peripheral surface of the spiral slack portion 41R and the peripheral wall 54. The spiral slack portion 41R can be smoothly deformed to gradually increase its diameter by utilizing the gap, and the slack of the wiring member 40 is smoothly absorbed in the slack absorbing case 52. In addition, since the rigid body 62 is pressed against the outer peripheral surface of the spiral slack portion 41R, the contact state between the slack portion 41R and the rigid body is stable, and the contact area between them can be kept small. This makes it possible to reduce the sliding resistance when the wiring member 40 enters the slack absorbing case 52. Since the sliding resistance when the wiring member 40 enters the slack absorbing case 52 is stable, the change in the movement resistance of the slider 38 can be suppressed.

[0102] In addition, the rigid body 62 is disposed at a position facing the entrance 54G, and guides the portion of the wiring member 40 entering through the entrance 54G toward the support portion 59 from an extension line of the entrance 54G. This makes it possible to delay the increase in diameter of the slack portion 41R near the point where the wiring member 40 enters through the entrance 54G. This makes it difficult for the wiring member 40 to be pressed against the peripheral wall 54 with a strong force on the extension line of the entrance 54G, and the wiring member 40 can smoothly enter the slack absorption case 52.

[0103] Moreover, the rigid body 62 is a long member supported to be able to swing about a swing shaft portion 53P1 located on the outer circumferential side of the excess length portion 41R, and the biasing member 70 includes a torsion spring that biases the rigid body 62 toward the outer circumferential surface of the excess length portion 41R by swinging the rigid body 62 about the swing shaft portion 53P1. Therefore, the rigid body 62 can be biased toward the outer circumferential surface of the excess length portion 41R by an inexpensive torsion spring.

[0104] In addition, the rigid body 62 includes a pressing surface 62f that is recessed on the side of the excess length portion 41R when viewed along the pivot shaft portion 53P1, so that the recess of the pressing surface 62f can be used to make the excess length portion 41R have a large diameter. This allows the excess length absorption length of the excess length portion 41R to be increased.

[0105] <Modifications based on the first embodiment> A modified example based on the first embodiment will be described. Fig. 10 and Fig. 11 are plan views showing a slack absorption device 150 according to the modified example. In Fig. 10, the slack of the wiring member 40 is at its maximum, and the slack portion 41R has its maximum outer diameter. In Fig. 11, the slack of the wiring member 40 is at its minimum, and the slack portion 41R has its minimum outer diameter.

[0106] The slack absorbing device 150 according to this modification has a rectangular bottom 153 instead of the bottom 53. Also, instead of the arc-shaped wall 58, a partial rectangular wall 158 with one side open is provided to match the shape of the edge of the bottom 153. The partial rectangular wall 158 has a pair of side walls continuing to both ends of the rectangular, elongated plate-like wall, and the pair of side walls are continuing to the second wall and third wall. Therefore, the peripheral wall 154 corresponding to the peripheral wall 54 is formed in a rectangular frame shape.

[0107] Further, in addition to the above-mentioned urging unit 60, additional urging units 160, 160 are provided. The additional urging units 160 are disposed at a position obtained by rotating the urging unit 60 about the central axis of the support portion 59. One additional urging unit 160 is disposed at a position obtained by rotating the urging unit 60 90 degrees about the central axis of the support portion 59 on the opposite side to the entrance 54G. In other words, one additional urging unit 160 is positioned inside one corner of the partial rectangular wall portion 158 (the corner facing the entrance 54G).

[0108] The other additional urging unit 160 is disposed at a position obtained by rotating the urging unit 60 by another 180 degrees around the central axis of the support portion 59 in the opposite direction to the entrance 54G. In other words, the other additional urging unit 160 is located inside the other corner of the partial rectangular wall portion 158 (the corner facing the urging unit 60).

[0109] Therefore, the urging unit 60 and the additional urging units 160, 160 are disposed in a dispersed manner in the circumferential direction of the outer circumferential surface of the excess length portion 41R.

[0110] According to the slack absorbing device 150 of this modification, when the slider 38 is located at the second position P2 close to the slack absorbing device 150, the length of the slack portion 41R is at its maximum. In this state, the outer diameter of the slack portion 41R is at its maximum and spreads widely inside the slack absorbing case 52. Therefore, the rigid bodies 62 of the urging unit 60 and the additional urging units 160, 160 are pushed outward by the slack portion 41R and are in a separated position. For example, the outer peripheral surface of the slack portion 41R spreads along the inner surfaces of the arcuate surface 57f and the pressing surfaces 62f of the rigid bodies 62.

[0111] From this state, the slider 38 moves toward the first position P1. Then, the wiring member 40 housed in the slack absorbing device 150 is pulled out into the guide portion 32, and the outer diameter of the slack portion 41R becomes smaller, as shown in Fig. 11. In this state, the rigid bodies 62 are brought into contact with the outer circumferential surface of the slack portion 41R by the biasing member 70, and are in the closest position.

[0112] When the slider 38 moves from the first position P1 to the second position P2, the wiring member 40 in the guide portion 32 is pushed into the slack absorbing device 150 through the entrance 54G. The pushed wiring member 40 moves in a spiral motion toward the rigid body 62 of the urging unit 60 facing the entrance 54G and toward the rigid bodies 62 of the two subsequent additional urging units 160. As the wiring member 40 is pushed in, the outer diameter of the slack portion 41R tends to increase, so that the rigid bodies 62 are pushed toward the isolated posture. As a result, the rigid bodies 62 tend to move from the closest posture toward the separated posture. At the same time, the wiring member 40 draws a spiral motion in the slack absorbing case 52 while being guided toward the support portion 59 side, that is, toward the center of the spiral, by the pressing surfaces 62f of the rigid bodies 62. Therefore, in the initial stage when the wiring member 40 is pushed into the slack taking up device 150, the wiring member 40 is prevented from suddenly expanding to the maximum outer diameter within the peripheral wall 154 (see the slack portion 41R indicated by the two-dot chain line in FIG. 11).

[0113] Since the rigid body 62 is biased toward the support portion 59 by the biasing member 70, the rigid body 62 can gradually move from the closest position toward the remote position as the wiring member 40 is pushed in. Therefore, the maximum outer diameter of the surplus length portion 41R gradually increases, and can absorb the surplus length of the wiring member 40.

[0114] When the wiring member 40 is housed in the slack absorbing case 52 to the maximum extent, the slack portion 41R expands to the maximum outer diameter and can absorb the slack of the wiring member 40.

[0115] According to this modification, the multiple rigid bodies 62 can bias the outer peripheral surface of the excess portion 41R at positions distributed in the circumferential direction of the outer peripheral surface of the excess portion 41R. This allows the position of the spiral of the excess portion 41R to be controlled at multiple positions on the outer peripheral side. For example, the operation of increasing the outer diameter of the excess portion 41R can be controlled so that the center of the spiral of the excess portion 41R approaches the support portion 59, or so that the size of the gap between the outer peripheral surface of the excess portion 41R and the peripheral wall 154 is kept constant in the circumferential direction of the outer peripheral surface of the excess portion 41R.

[0116] [Embodiment 2] An explanation will be given of a slack absorbing device 250 for a wiring member 40 according to the second embodiment. Fig. 12 is a perspective view showing the slack absorbing device 250. Fig. 13 is an exploded perspective view showing the slack absorbing device 250. In the second embodiment, explanations of configurations common to the first embodiment will be omitted, and differences from the first embodiment will be mainly explained.

[0117] The slack absorbing device 250 can be used as a device for absorbing the slack of the wiring member 40 extending from the slide sheet 20, similarly to the first embodiment.

[0118] The slack take-up device 250 includes a slack take-up case 252 and a biasing unit 260 .

[0119] The slack absorbing case 252 is a case that accommodates the slack portion 41R of the wiring member 40. The slack absorbing case 252 includes a bottom portion 253, a peripheral wall 254, and a support portion 59. The slack absorbing case 252 may be, for example, a resin molded product.

[0120] The bottom portion 253 is formed in a plate shape, here a rectangular plate shape.

[0121] The support portion 59 may be the same as the support portion 59 described in the embodiment 1. The support portion 59 is located at the center of the bottom portion 253. As in the embodiment 1, the internal support portion 44 of the wiring member 40 can be supported by the support portion 59.

[0122] The peripheral wall 254 protrudes from the outer periphery of the bottom portion 253 toward one main surface of the bottom portion 253, and surrounds the support portion 59 with a gap therebetween.

[0123] An opening 254G for the wiring member 40 is formed in the peripheral wall 254. The wiring member 40 is pushed into the slack absorbing case 252 or pulled out from the slack absorbing case 252 through the opening 254G.

[0124] In this embodiment, the peripheral wall 254 is formed in a rectangular frame shape extending along the periphery of the rectangular plate-shaped bottom portion 253. An entrance 254G through which the wiring member 40 can pass is formed in one of the four corners of the peripheral wall 254.

[0125] The peripheral wall 254 includes a straight wall portion 255 , an opposing wall portion 256 , and an opposite straight wall portion 257 .

[0126] The straight wall portion 255 extends from the entrance 254G along one straight edge of the periphery of the rectangular plate-shaped bottom portion 253. The opposite straight wall portion 257 extends along one straight edge of the periphery of the rectangular plate-shaped bottom portion 253 that faces the straight wall portion 255. The opposing wall portion 256 extends along one straight edge of the periphery of the rectangular plate-shaped bottom portion 253 that faces the entrance 254G. The opposing wall portion 256 connects an end of the straight wall portion 255 and an end of the opposite straight wall portion 257 on the opposite side of the entrance 254G.

[0127] A portion of peripheral wall 254 facing straight wall portion 255 across opening 254G is formed thicker than other portions, and an arc-shaped surface 254f facing support portion 59 is formed on the inner peripheral surface of the thick portion. Arc-shaped surface 254f is formed so as to follow an arc centered on the central axis of support portion 59.

[0128] The excess length portion 41R can grow or shrink in a spiral shape within the space surrounded by the peripheral wall 254, thereby absorbing the excess length and sending out the absorbed excess length of the wiring member 40 to the outside.

[0129] The biasing unit 260 biases the excess length portion 41R in the excess length absorbing case 252. The biasing unit 260 includes a rigid body 262 and a biasing member 270.

[0130] The rigid body 262 may be rigid enough to bias the wiring member 40 while maintaining the initial shape at the contact portion with the wiring member 40. The rigid body 262 may be a rigid body made of resin, metal, or the like.

[0131] The rigid body 262 is located on the outer circumferential side of the excess length portion 41R. The rigid body 262 is supported on the support portion 59 so as to be movable toward and away from the support portion 59.

[0132] More specifically, the rigid body 262 is located inside the peripheral wall 254 so as to face the entrance 254G.

[0133] The rigid body 262 is supported on the outer circumferential side of the excess length portion 41R so as to be movable toward and away from the support portion 59.

[0134] In this embodiment, the rigid body 262 includes an arc-shaped portion 263 that forms a partial arc shape, and movable support portions 264 located on both ends of the arc-shaped portion 263. The rigid body 262 may be configured, for example, by a resin part molded with a mold.

[0135] The arc-shaped portion 263 has a shape in which a long and narrow plate-like portion is bent to form an arc so as to be convex toward the outer periphery. The surface of the arc-shaped portion 263 on the support portion 59 side forms a pressing surface 262f that is recessed on the excess portion 41R side when viewed along the axial direction of the support portion 59.

[0136] The pressing surface 262f includes a straight surface 262f1 located in the middle of the pressing surface, and a pair of arcuate surfaces 262f2 located on both sides of the straight surface 262f1.

[0137] The linear surface 262f1 is a surface that is observed as a straight line when viewed along the axial direction of the support portion 59. The linear surface 262f1 may be a flat surface, or may be a surface on which protrusions or slits are formed along the extending direction of the linear surface 262f1.

[0138] The pair of arc-shaped surfaces 262f2 are surfaces that extend in an arc shape from both ends of the linear surface 262f1. The arc-shaped surface 262f2 is a surface that is observed to be arc-shaped when viewed along the axial direction of the support portion 59. The arc-shaped surface 262f2 may be a smooth surface that extends in an arc shape, or a surface on which protrusions or slits are formed along the extension direction of the arc-shaped surface 262f2. The arc-shaped surface 262f2 may be a surface that forms an arc shape with the central axis of the support portion 59 as the center of curvature. The pair of arc-shaped surfaces 262f2 may be arranged along the circumferential direction of the same circle.

[0139] In this embodiment, the pressing surface 262f is formed with a protrusion 262fp along its extension direction. More specifically, the multiple protrusions 262fp extend in parallel with each other at intervals. The excess portion 41R is disposed on the inner circumferential side of the pressing surface 262f. The protrusion 262fp extends along the circumferential direction of the outer circumferential surface of the excess portion 41R to be pressed.

[0140] The pair of movable support portions 264 protrude outward from both ends of the arc-shaped portion 263. A guide protrusion 264P protrudes from each of the pair of movable support portions 264. A guide slit 256G is formed in the bottom portion 253 on the movement path of the guide protrusion 264P.

[0141] The head of the guide protrusion 264P is formed wider than the base end side portion thereof. The end of the guide slit 256G on the entrance / exit 254G side is formed wider than the other portion.

[0142] The pair of guide protrusions 264P are fitted into the guide slit 256G at the end of the guide slit 256G on the entrance / exit 254G side. Thereafter, the guide protrusions 264P move toward the opposing wall 256 of the guide slit 256G, thereby preventing the guide protrusions 264P from coming out of the guide slit 256G.

[0143] The rigid body 262 is disposed at a position on the opposing wall portion 256 side of the bottom portion 253. In this state, the pair of guide protrusions 264P are guided by the guide slits 256G, and the outward surfaces of the pair of movable support portions 264 can be guided facing the inner surfaces of the straight wall portion 255 and the opposite straight wall portion 257.

[0144] As a result, the rigid body 262 is supported at a position on the side of the slack absorbing case 252 opposite the entrance 254G so as to be movable toward and away from the support portion 59.

[0145] When the rigid body 262 is at the farthest position from the support portion 59, the part of the arc-shaped portion 263 opposite to the linear surface 262f1 is in contact with the opposing wall portion 256. The position of the rigid body 262 in this state may be referred to as a separated position. In this state, one of the arc-shaped surfaces 262f2 is located at a linear opposing position from the entrance 254G, and the linear surface 262f1 extends continuously from the arc-shaped surface 262f2 so as to move away from the linear extension line of the entrance 254G, and the other arc-shaped surface 262f2 is located at the end of the linear surface 262f1. The wiring member 40 pushed in from the entrance 254G is guided so as to move away from the linear extension line of the entrance 254G along the pressing surface 262f and return to the entrance 254G side by passing around the support portion 59.

[0146] The wiring member 40 comes into contact with the protrusions 262fp formed on the pressing surface 262f, thereby reducing the contact area between the pressing surface 262f and the wiring member 40. This allows the wiring member 40 to slide smoothly and move on the pressing surface 262f.

[0147] The rigid body 262 can approach the support portion 59 in the same posture. When the length of the excess portion 41R is at its shortest, the position where the rigid body 262 is closest to the support portion 59 may be referred to as the closest position. In this state, the excess portion 41R forms a spiral around the support portion 59 within the space surrounded by the pressing surface 262f that is recessed relative to the support portion 59.

[0148] The rigid body 262 is an example of an entrance-facing rigid body that is disposed at a position facing the entrance 254G and guides the portion of the wiring member 40 that enters through the entrance 254G from the extension line of the entrance 254G toward the support portion 59.

[0149] The biasing member 270 is a member that biases the rigid body 262 toward the outer circumferential surface of the excess length portion 41R. In this embodiment, the biasing member 270 includes a compression coil spring 272 that biases the rigid body 262 toward the outer circumferential surface of the excess length portion 41R. More specifically, the biasing member 270 includes a plurality of compression coil springs 272 (two in this example).

[0150] The compression coil spring is assembled into the slack take-up device 250 in the following manner.

[0151] That is, spring receiving portion 252R is formed on the inside of a corner where straight wall portion 255 and opposing wall portion 256 of slack absorbing case 252 intersect, and on the inside of a corner where opposite straight wall portion 257 and opposing wall portion 256 intersect. Spring receiving portion 252R has an arc-shaped concave surface on which an end of a compression coil spring can be disposed.

[0152] A spring support protrusion 264PS protrudes from each of the pair of movable support parts 264 toward the opposing wall part 256. The spring support protrusion 264PS is formed in a protruding shape that allows an end part of a compression coil spring 272 to be fitted therein.

[0153] With the rigid body 262 assembled in the slack absorbing case 252, the spring support protrusions 264PS of the pair of movable support parts 264 are inserted into one end of the compression coil spring 272, and the other end of the compression coil spring 272 is disposed on the concave surface of the spring receiving part 252R. As a result, the pair of compression coil springs 272 urge the rigid body 262 from the separated position toward the close position.

[0154] The biasing member may include only one compression coil spring. The biasing member may be a leaf spring, rubber, or the like.

[0155] According to the slack absorbing device 250 of the second embodiment, when the length of the slack portion 41R is at its maximum, the rigid body 262 is pushed outward by the slack portion 41R and is located at the separated position. In this state, the slack portion 41R can expand in a spiral shape with a large diameter inside the pressing surface 262f.

[0156] 14, the outer diameter of the surplus length portion 41R becomes smaller inside the slack absorption device 250. Then, the biasing member 270 presses the rigid body 262 toward the support portion 59, so that the rigid body 262 moves to the closest position while remaining in contact with the outer peripheral surface of the reduced surplus length portion 41R.

[0157] Thereafter, the wiring member 40 is pushed into the slack absorbing device 250 through the entrance 254G. The pushed wiring member 40 faces one of the arc-shaped surfaces 262f2 of the rigid body 262 facing the entrance 254G, and pushes the rigid body 262 toward the isolated position. This causes the rigid body 262 to move from the closest position toward the isolated position. At the same time, the wiring member 40 is guided from one of the arc-shaped surfaces 262f2 to the other arc-shaped surface 262f2 via the linear surface 262f1, and toward the support portion 59 side from the linear extension of the entrance 254G. As the wiring member 40 is pushed into the slack absorbing device 250, the outer diameter of the slack portion 41R gradually increases.

[0158] That is, in the initial stage when the wiring member 40 is pushed into the slack absorbing device 250, the wiring member 40 is prevented from suddenly expanding to the maximum outer diameter within the peripheral wall 254 (see slack portion 41R indicated by a two-dot chain line in FIG. 14). Then, the slack portion 41R gradually increases its outer diameter while gradually moving the rigid body 262 from the closest position toward the farthest position, gradually absorbing the slack. Therefore, the slack portion 41R can smoothly absorb the slack.

[0159] Moreover, before the excess length portion 41R reaches its maximum outer diameter, a part of the outer circumferential surface of the excess length portion 41R contacts a part of the linear surface 262f1 of the pressing surface 262f. Therefore, while the excess length portion 41R is growing, the contact area between the outer circumferential surface of the excess length portion 41R and the pressing surface 262f can be reduced, and the excess length portion 41R can slide smoothly against the pressing surface 262f. From this point of view, the excess length portion 41R can grow smoothly without being hindered by contact with the pressing surface 262f.

[0160] Therefore, according to the slack absorbing device 250 for the wiring member 40, when the wiring member 40 enters the slack absorbing case 252 through the entrance 254G, the rigid body 262 is pressed against the outer peripheral surface of the spiral slack portion 41R, so that the contact state between the slack portion 41R and the rigid body is stable and the contact area between them can be kept small. This makes it possible to reduce the sliding resistance when the wiring member 40 enters the slack absorbing case 252. Since the sliding resistance when the wiring member 40 enters the slack absorbing case 252 is stable, it is possible to suppress changes in the movement resistance of the slider 38.

[0161] In addition, rigid body 262 is disposed at a position facing entrance 254G, and guides the portion of wiring member 40 entering through entrance 254G toward support portion 59 from an extension line of entrance 254G. This makes it possible to delay the increase in diameter of surplus length portion 41R near the point where wiring member 40 enters via entrance 254G. This makes it difficult for wiring member 40 to be pressed against peripheral wall 254 with a strong force on the extension line of entrance 254G, and wiring member 40 can smoothly enter into slack length absorption case 252.

[0162] In addition, the rigid body 262 is supported on the outer circumferential side of the excess length portion 41R so as to be able to move toward and away from the support portion 59, and the biasing member 270 includes a compression coil spring 272 that biases the rigid body 262 toward the outer circumferential surface of the excess length portion 41R, so that the rigid body 262 can be biased toward the outer circumferential surface of the excess length portion 41R by the inexpensive compression coil spring 272.

[0163] If the biasing member 270 includes a plurality of compression coil springs 272, the plurality of compression coil springs 272 bias the rigid body 262 at separate positions, so that the rigid body 262 can move in a stable posture. This stabilizes the contact state between the rigid body 262 and the excess length portion 41R, and the size of the excess length portion 41R can be changed stably.

[0164] In addition, since the rigid body 262 includes the pressing surface 262f that is concave on the side of the excess length portion 41R, the concave portion of the pressing surface 262f can be used to make the excess length portion 41R have a large diameter. This allows the excess length absorption length of the excess length portion 41R to be increased.

[0165] The pressing surface 262f includes a straight surface 262f1 and a pair of arcuate surfaces 262f2 located on both ends of the straight surface 262f1. The straight surface 262f1 comes into contact with the outer circumferential surface of the excess length portion 41R, thereby reducing the contact area between the excess length portion 41R and the pressing surface 262f, and the excess length portion 41R can be deformed to smoothly increase its diameter. The recess formed by the pair of arcuate surfaces 262f2 can be used to increase the diameter of the excess length portion 41R. This increases the excess length absorption length of the excess length portion 41R.

[0166] Furthermore, since the protrusions 262fp are formed on the pressing surface 262f, the wiring member 40 can smoothly slide and move on the pressing surface 262f.

[0167] [Other variations] The configurations described in the above embodiments and modifications can be appropriately combined as long as they are not mutually inconsistent. For example, in the second embodiment, a plurality of urging units 260 including a rigid body 262 and an urging member 270 may be provided at different positions on the outer periphery of the extra length portion 41R. In the first embodiment, a protrusion may be formed on the pressing surface 62f of the rigid body 62. [Explanation of symbols]

[0168] 10. Body 12, 13 Seat rail 20 Slide Sheet 30 Wiring guide unit 32 Guide section 32P Guide Space 38 Slider 40 Wiring materials 41 Wiring for drawer 41R extra length 44 Internal support part 50, 150, 250, 550 Excess length absorber 51 Lid 52, 252 Extra length absorption case 53, 153, 253 bottom 53P1 Swing shaft 53P2 Coil support shaft 53f2s Slit 53h1 Drawer opening 53h2 Working opening 54, 154, 254, 554 Peripheral wall 54G, 254G entrance / exit 55 1st wall section 56 Second wall section 57 Third wall 57f, 58f, 254f arcuate surface 58 Arc-shaped wall section 59 Support part 59S Slit 60, 260 Actuation unit 62, 262 Rigid body 62f, 262f Pressing surface 62g groove 62h hole 70, 270 biasing member 70a Coil section 70b 1st end 70c 2nd end 158 Partial square wall 160 Additional Power Unit 252R Spring bearing part 255 Straight wall 256 Opposing wall 256G Guide slit 257 Opposite side straight wall 262f1 straight surface 262f2 arcuate surface 262fp protrusion 263 Arc part 264 Movable support part 264P Guide protrusion 264PS Spring support protrusion P1 1st position P2 2nd position

Claims

1. A wiring member slack absorbing device that absorbs slack in a wiring member having an internal support portion, comprising: a slack absorption case that accommodates a slack portion of the wiring member caused by the slack; a biasing unit for biasing the excess length portion in the excess length absorbing case; Equipped with The slack absorbing case includes a support portion that supports the internal support portion, and a peripheral wall that surrounds the support portion with a gap therebetween, The peripheral wall has an entrance / exit for the wiring member, the surplus length portion is a portion of the wiring member that is disposed in the surplus length absorption case through the opening and that forms a spiral around the support portion, The biasing unit includes: A rigid body located on an outer circumferential side of the excess length portion; a biasing member that biases the rigid body against an outer peripheral surface of the excess portion; A wiring member slack absorption device comprising:

2. 2. The wiring member slack take-up device according to claim 1, A wiring member slack absorption device, wherein the biasing units are disposed in a plurality of positions dispersed in a circumferential direction of the outer peripheral surface of the slack portion.

3. 3. The wiring member slack take-up device according to claim 1, further comprising: The rigid body is arranged at a position opposite the entrance and includes an entrance-facing rigid body that guides the portion of the wiring member that enters through the entrance from an extension line of the entrance to the support portion side.

4. 3. The wiring member slack take-up device according to claim 1, further comprising: the rigid body is a long member that is swingably supported around a swing shaft portion that is located on an outer circumferential side of the excess length portion, The biasing member includes a torsion spring that biases the elongated member toward an outer peripheral surface of the excess portion by swinging the elongated member around the swing shaft portion.

5. 5. The wiring member slack take-up device according to claim 4, The central axis of the swing shaft portion is parallel to the axis of the spiral formed by the excess portion, The long member includes a pressing surface that is recessed on the side of the excess length portion when viewed along the pivot shaft portion.

6. 3. The wiring member slack take-up device according to claim 1, further comprising: the rigid body is supported on an outer circumferential side of the excess portion so as to be movable toward and away from the support portion, The biasing member includes a compression coil spring that biases the rigid body toward an outer peripheral surface of the excess portion.

7. 7. The wiring member slack take-up device according to claim 6, The biasing member includes a plurality of the compression coil springs.

8. 7. The wiring member slack take-up device according to claim 6, The rigid body includes a pressing surface that is recessed toward the excess length portion when viewed along the axis of the spiral formed by the excess length portion.

9. 9. The wiring member slack take-up device according to claim 8, The pressing surface includes a straight surface located in the middle of the pressing surface, and a pair of arcuate surfaces located on both sides of the straight surface.

10. 3. The wiring member slack take-up device according to claim 1, further comprising: A wiring member slack absorbing device, wherein a protrusion extending along a circumferential direction of the slack portion is formed on a surface of the rigid body that contacts the slack portion.

Images