Cable winding device and method for assembling cable winding device

Abstract

To provide a cable winding device capable of facilitating winding of flexible flat cable around a shaft body, thereby improving the assemblability thereof.SOLUTION: A cable winding device 1 includes: a flexible flat cable (FFC) 2; a shaft 3 fixing the FFC 2; and an enclosure 4 (a lower case 5 and an upper cover 6) for enclosing the shaft 3 and the FFC 2 wound around the shaft 3. The cable winding device 1 is provided with a shaft body fitting part 7 which can fit the shaft 3 to a specified position inside the lower case 5.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a cable winding device for a flexible flat cable and a method for assembling the cable winding device.

Background Art

[0002] Conventionally, a cable winding device for a flexible flat cable has been known. The cable winding device disclosed in Patent Document 1 has a structure in which a shaft body and a housing are integrally formed, and a flexible flat cable is wound around the shaft body.

[0003] By the way, in a cable winding device having such a structure, the following operations are performed in the assembly process. That is, the flexible flat cable is fixed to the shaft body, and the flexible flat cable is wound around the shaft body.

[0004] In this regard, in the operation of winding the flexible flat cable around the shaft body, it is necessary to wind the flexible flat cable vertically around the shaft body located inside the housing while guiding the flexible flat cable obliquely upward and rotating it. However, such an operation is difficult for an operator due to the difficulty of handling a long strip-shaped object.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to provide a cable winding device capable of easily winding a flexible flat cable around a shaft body, and thus improving the assemblability.

Means for Solving the Problem

[0007] This invention relates to a cable winding device comprising a flexible flat cable, a shaft body for fixing the flexible flat cable, and a housing for accommodating the shaft body and the flexible flat cable wound around the periphery of the shaft body. A shaft body mounting portion is provided to enable the shaft body to be mounted at a predetermined position inside the housing. The housing is composed of a lower case and an upper cover fitted to the lower case to close the opening. The shaft body mounting portion has a fitting portion for fitting the end face of the shaft body and at least the bottom face of the lower case or the back face of the upper cover facing the bottom face. The fitting portion is provided on one side of the opposing faces and includes a fitting recess bored in the fitting direction, and a fitting protrusion provided on the other side of the opposing faces and extending axially along the fitting direction. The fitting recess and the fitting protrusion are inserted and fitted so that the shaft body does not rotate relative to the housing. , only a pair of the fitting recesses and the fitting projections are provided, the cross-sectional shapes of the fitting recesses and the fitting projections are formed in a non-circular shape, a pair of the fitting recesses and the fitting projections are provided on the central axis of the shaft body, and the cross-sectional shapes of the fitting recesses and the fitting projections are formed in a rotationally symmetric shape It is characterized by this.

[0008] The present invention also relates to an assembling method of a cable winding device including a flexible flat cable, a shaft body for fixing the flexible flat cable, and a housing for accommodating the shaft body and the flexible flat cable wound around the periphery of the shaft body. The method includes a step of winding the flexible flat cable around the shaft body to create a cable wound body, and a step of mounting the cable wound body on a shaft body mounting portion provided at a predetermined position inside the housing. The housing is composed of a lower case and an upper cover fitted to the lower case to close an opening. The shaft body mounting portion has a fitting portion for fitting the end face of the shaft body and at least the bottom face of the lower case or the back face of the upper cover facing the bottom face. The fitting portion is provided on one side of the opposing faces and includes a fitting recess bored in the fitting direction, and a fitting protrusion provided on the other side of the opposing faces and extending along the fitting direction and having a shaft shape. In the step of mounting the cable wound body on the shaft body mounting portion, the fitting recess and the fitting protrusion are inserted and fitted so that the shaft body does not rotate with respect to the housing. , only a pair of the fitting recesses and the fitting projections are provided, the cross-sectional shapes of the fitting recesses and the fitting projections are formed in a non-circular shape, a pair of the fitting recesses and the fitting projections are provided on the central axis of the shaft body, and the cross-sectional shapes of the fitting recesses and the fitting projections are formed in a rotationally symmetric shape It is characterized by this.

[0009] Note that the non-circular shape shall include a polygonal shape that can be fitted at a predetermined phase. For example, a pentagon, a hexagon, etc. Also, a key fitting shape shall be included In addition, the rotationally symmetric shape is a shape that can be fitted at any phase, and includes, for example, a regular polygonal shape in which the lengths of each side are equal and the angles formed by two sides are also equal. That is, a regular pentagon, a regular hexagon, etc. are included. Also, not only a cross shape and a + shape, but also a star (spline) shape, etc. shall be included

[0010] According to the present invention, the flexible flat cable can be easily wound around the shaft body, and thus the assemblability of the cable winding device can be improved.

[0011] Specifically, according to the cable winding device of the present invention, when the shaft body is removed from the housing, it is possible to wind a flexible flat cable around the shaft body. Therefore, when winding the flexible flat cable, there is no need to bypass the peripheral wall portion of the housing. Thus, it is possible to guide the flexible flat cable perpendicular to the shaft body and wind it by rotating the shaft body. Therefore, the flexible flat cable can be easily wound around the shaft body. Also, regarding the automation of the same operation, it is possible to attach the shaft body to the drive shaft and rotate it to wind the flexible flat cable around the shaft body. Therefore, it becomes easy to automate the operation of winding the flexible flat cable around the shaft body. Consequently, it is possible to improve the assemblability of the cable winding device.

[0012] Further, the housing is composed of a lower case and an upper cover that is fitted to the lower case to close the opening, and the shaft body mounting portion has a fitting portion that fits the end face of the shaft body and at least the bottom surface of the lower case or the back surface of the upper cover facing the bottom surface.

[0013] Therefore, the thing obtained by winding the flexible flat cable around the shaft body (the cable winding body described above) can be mounted at a predetermined position on the bottom surface of the lower case or the back surface of the upper cover facing the bottom surface. Therefore, while facilitating the operation of winding the flexible flat cable around the shaft body, it is possible to mount the cable winding body created by this operation as a single disk body. Consequently, it is possible to improve the assemblability of the cable winding device.

[0014] Further, the fitting portion is composed of a fitting recess provided on one side of the opposing surfaces and a fitting protrusion provided on the other side of the opposing surfaces, and the fitting recess and the fitting protrusion are inserted and fitted.

[0015] Therefore, while facilitating the operation of winding a flexible flat cable around the shaft body, it is possible to securely attach the cable winding body as a single disk body with a simple configuration. As a result, the assemblability of the cable winding device can be improved.

[0016] In addition, since only a pair of the fitting recesses and the fitting projections are provided and the cross-sectional shapes of the fitting recesses and the fitting projections are formed in a non-circular shape, the mounting angle of the shaft body can be determined. Then, when mounting the shaft body, the operation of appropriately adjusting the mounting angle of the shaft body becomes unnecessary. Also, the shaft body does not rotate inadvertently after the shaft body is mounted. As a result, the assemblability of the cable winding device can be improved

[0017] In addition, since a pair of the fitting recesses and the fitting projections are provided on the central axis of the shaft body and the cross-sectional shapes of the fitting recesses and the fitting projections are formed in a rotationally symmetric shape, the mounting angle of the shaft body can be changed. Therefore, the winding start position (position in the circumferential direction of the shaft body) of the flexible flat cable wound around the shaft body can be changed. Accordingly, it is possible to stepwise change the maximum payout length of the flexible flat cable. Then, in a cable winding device with different specifications of the maximum payout length of the flexible flat cable, the operation of selecting and winding a flexible flat cable with a different length becomes unnecessary. As a result, the assemblability of the cable winding device can be improved

[0018] As an aspect of the present invention, a flange portion extending in the radially outer direction may be provided at the corner between the peripheral surface and the end surface of the shaft body. Note that the flange portion may be provided at either one of the corners or at both corners.

[0019] According to the present invention, when winding a flexible flat cable around the shaft body, the flexible flat cable can be guided perpendicular to the shaft body by causing the flexible flat cable to follow the flange portion. Therefore, it is possible to wind the flexible flat cable without deviation. Accordingly, the operation of winding the flexible flat cable around the shaft body becomes even easier. In addition, it is possible to prevent the flexible flat cable wound around the shaft body from loosening, deviating, or unraveling. As a result, the assemblability of the cable winding device can be improved.

[0020] As an aspect of the present invention, among the cable winding bodies formed by winding the flexible flat cable around the shaft bodies having different outer diameters, one selected cable winding body may be provided.

[0021] According to the present invention, in a cable winding device with different specifications of the maximum payout length of a flexible flat cable, it is possible to share the housing. Further, in a cable winding device with a short maximum payout length of the flexible flat cable, if the flexible flat cable is wound around a shaft body with a large outer diameter, it is possible to accommodate the flexible flat cable inside the housing at an appropriate density. Thereby, it is possible to prevent the flexible flat cable from hitting the outer peripheral wall of the housing and generating abnormal noise.

[0022] Conversely, in a cable winding device with a long maximum payout length of the flexible flat cable, if the flexible flat cable is wound around a shaft body with a small outer diameter, it is possible to accommodate the flexible flat cable inside the housing at an appropriate density. Thereby, it is possible to prevent the outer peripheral wall of the housing and adjacent flexible flat cables from rubbing against each other and inhibiting smooth winding or payout.

[0023] As an aspect of the present invention, a pair of the fitting concave portions and the fitting convex portions and another pair of the fitting concave portions and the fitting convex portions may be arranged parallel to each other. Note that the cross-sectional shapes of the fitting concave portions and the fitting convex portions are not limited to circular shapes.

[0024] According to the present invention, the mounting angle of the shaft body can be determined. Then, when mounting the shaft body, the operation of appropriately adjusting the mounting angle of the shaft body becomes unnecessary. In addition, the shaft body does not rotate inadvertently after the shaft body is mounted. As a result, it becomes possible to improve the assemblability of the cable winding device.

[0025] As an aspect of the present invention, a pair of the fitting concave portions and the fitting convex portions are provided on the central axis of the shaft body, a plurality of positioning fitting concave portions, which are the other fitting concave portions, are provided concentrically with respect to the central axis of the shaft body, a positioning fitting convex portion, which is the other fitting convex portion, is provided concentrically with respect to the central axis of the shaft body, and any one of the positioning fitting concave portions and the positioning fitting convex portion may be inserted and fitted.

[0026] According to the present invention, the mounting angle of the shaft body can be changed. Therefore, the winding start position (position in the circumferential direction of the shaft body) of the flexible flat cable wound around the shaft body can be changed. Accordingly, it becomes possible to change the maximum payout length of the flexible flat cable step by step. Then, in a cable winding device having different specifications of the maximum payout length of the flexible flat cable, the operation of selecting a flexible flat cable having a different length and winding it becomes unnecessary. As a result, it becomes possible to improve the assemblability of the cable winding device.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

[0028] One embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of the cable winding device 1, FIG. 2 is an exploded perspective view of the cable winding device 1, FIG. 3 is a perspective view of the shaft 3, FIG. 4 is a perspective view of the lower case 5, and FIG. 5 is a perspective view of the upper cover 6.

[0029] Also, FIG. 6 is a flowchart of the assembly process of the cable winding device 1, FIG. 7 is a perspective view showing the situation of creating the cable winding body 10, FIG. 8 is a perspective view showing the situation of mounting the cable winding body 10 on the lower case 5, and FIG. 9 is a perspective view showing the situation of fitting the upper cover 6 to the lower case 5. In the present application, as shown in each drawing, the front - rear direction, the up - down direction, and the left - right direction are defined.

[0030] The cable winding device 1 according to the present invention winds or pays out a flexible flat cable 2 that is routed to a slide seat of an automobile. The flexible flat cable 2 is formed by sandwiching strip - shaped conductors 21 arranged in parallel with a sheet - shaped insulator 22. Hereinafter, the flexible flat cable 2 will be described as FFC2.

[0031] As shown in FIGS. 1 and 2, in addition to the aforementioned FFC 2, the cable winding device 1 includes a shaft 3 and a housing 4. The housing 4 is composed of a lower case 5 and an upper cover 6. Further, the cable winding device 1 is provided with a shaft mounting portion 7 that enables the shaft 3 to be mounted on the bottom surface 5b of the lower case 5. The shaft mounting portion 7 has two fitting portions 71 and 72.

[0032] As shown in FIG. 3, the shaft 3 is formed in a cylindrical shape. The shaft 3 is provided with a slit 31 bored downward from its upper end surface 3t. The slit 31 curves along the outer peripheral surface 3c from the slit inlet on the outer peripheral surface 3c and eventually leads to a slit outlet 3o extending in the left - right direction. The shaft 3 can fix the FFC 2 fitted into the slit 31. Incidentally, the FFC 2 is pulled out upward by being bent obliquely at the slit outlet 3o (see FIG. 7).

[0033] Also, the shaft 3 is provided with fitting holes 34 and 35 bored upward from its lower end surface 3b. The fitting hole 34 constitutes the fitting portion 71 and is formed parallel to the central axis C on the rear side of the slit outlet 3o. The fitting hole 34 has a circular cross - sectional shape and is a bottomed hole that does not penetrate through to the upper end surface 3t of the shaft 3. On the other hand, the fitting hole 35 constitutes the fitting portion 72 and is formed parallel to the central axis C on the front side of the slit outlet 3o. The fitting hole 35 also has a circular cross - sectional shape and is a bottomed hole that does not penetrate through to the upper end surface 3t of the shaft 3.

[0034] As shown in FIG. 4, the lower case 5 is formed in a Q shape when viewed from above. The lower case 5 has a bottom wall portion 51 and a peripheral wall portion 52 extending upward from the outer peripheral end portion of the bottom wall portion 51. The peripheral wall portion 52 is substantially cylindrical, but the right wall portion 52b in the rear portion extends in the left-right direction. Also, the rear wall portion 52r in the right wall portion extends in the front-rear direction and bends to the right to be parallel to the wall portion 52b. Thus, a cable passage 53 extending to the right side is formed in the lower case 5.

[0035] Further, the lower case 5 is provided with fitting shafts 54 and 55 extending upward from its bottom surface 5b. The fitting shaft 54 constitutes a fitting portion 71 and is formed parallel to the central axis C at a position and size corresponding to the fitting hole 34 described above. The fitting shaft 54 has a circular cross-sectional shape and further has a tapered shape in which the diameter increases from the tip side toward the base end side. On the other hand, the fitting shaft 55 constitutes a fitting portion 72 and is formed parallel to the central axis C at a position and size corresponding to the fitting hole 35 described above. The fitting shaft 55 also has a circular cross-sectional shape and further has a tapered shape in which the diameter increases from the tip side toward the base end side.

[0036] Note that there is no wall closing the inner accommodation space at the upper end portion of the lower case 5, and an opening 5o is formed. Also, a plurality of reinforcing ribs 511 spreading radially are provided on the bottom surface 5b of the lower case 5. Further, on the outer peripheral surface (peripheral wall portion 52) of the lower case 5, a fitting receiving portion 521 is provided against which the leading edge of the fitting wall portion 62 described later abuts when the upper cover 6 is fitted. The fitting receiving portion 521 is bent downward in some places and also serves to guide a locking plate portion 65 described later by two fitting receiving portions 521 that are parallel to each other along the vertical direction. A locking claw 522 is provided between the fitting receiving portions 521 extending downward.

[0037] As shown in FIG. 5, the upper cover 6 is formed in a Q shape when viewed from the upper side. The upper cover 6 has a lid wall portion 61 and a fitting wall portion 62 extending downward from the outer peripheral end portion of the lid wall portion 61. The fitting wall portion 62 is substantially cylindrical, but the right wall portion 62b in the rear portion extends in the left-right direction. Also, the rear wall portion 62r in the right wall portion extends in the front-rear direction and bends to the right to be parallel to the wall portion 62b. In this way, a lid portion 63 that covers the cable passage 53 of the lower case 5 described above is formed on the upper cover 6.

[0038] Further, a slit 64 penetrating from the front surface 6f to the back surface 6b is provided on the upper cover 6 from the left portion to the central portion. The slit 64 is for passing the FFC 2 drawn upward from the shaft 3. Furthermore, a locking plate portion 65 extending further downward from the fitting wall portion 62 is provided on the upper cover 6. The locking plate portion 65 is formed parallel to the central axis C at a position corresponding to the locking claw 522 described above. The locking plate portion 65 has a plate width that fits between two fitting receiving portions 521 that are parallel to each other along the vertical direction, and further, a locking hole 652 penetrating from the inner peripheral surface to the outer peripheral surface is formed.

[0039] Next, the assembly process of the cable winding device 1 will be described. As shown in FIG. 6, in the assembly process of the cable winding device 1, there are a cable winding body creating process S1, a cable winding body mounting process S2, and an upper cover fitting process S3, and these are performed in order. However, there may be other processes not described in the present application.

[0040] As shown in FIG. 7, the cable winding body creation step S1 is a step of creating the cable winding body 10. In the cable winding body creation step S1, the shaft 3 is attached to the drive shaft S and rotated, and the FFC2 is wound around the shaft 3. With such a configuration, since it is not necessary to bypass the peripheral wall portion 52 of the lower case 5, the FFC2 can be wound around the shaft 3 perpendicularly. In order to wind the FFC2 without deviation, it is preferable to guide the running FFC2 with a guide roller or the like.

[0041] As shown in FIG. 8, the cable winding body mounting step S2 is a step of mounting the cable winding body 10 at a predetermined position inside the lower case 5. In the cable winding body mounting step S2, the shaft 3 at the center of the cable winding body 10 is mounted at a predetermined position on the bottom surface 5b of the lower case 5. Specifically, the fitting hole 34 and the fitting shaft 54 that constitute the fitting portion 71 are fitted, and at the same time, the fitting hole 35 and the fitting shaft 55 that constitute the fitting portion 72 are fitted. With such a configuration, the cable winding body 10 can be mounted as a single disk body.

[0042] As shown in FIG. 9, the upper cover fitting step S3 is a step of fitting the upper cover 6 to the lower case 5. In the upper cover fitting step S3, the upper cover 6 is placed over the lower case 5 on which the cable winding body 10 is mounted and locked to each other. Specifically, the locking plate portion 65 of the upper cover 6 is fitted between two fitting receiving portions 521 that are parallel to each other along the vertical direction and pushed in as it is to hook the locking claw 522 in the locking hole 652. With such a configuration, the opening 5o of the lower case 5 can be closed, and at the same time, the shaft 3 (cable winding body 10) can be pressed so as not to come out by the back surface 6b of the upper cover 6. The back surface 6b of the upper cover 6 is a plane perpendicular to the vertical direction in order to press the shaft 3 (cable winding body 10) with a surface.

[0043] As described above, the cable winding device 1 includes an FFC 2, a shaft 3 for fixing the FFC 2, and a housing 4 (a lower case 5 and an upper cover 6) for accommodating the shaft 3 and the FFC 2 wound around the shaft 3. And the cable winding device 1 is provided with a shaft mounting portion 7 that enables the shaft 3 to be mounted at a predetermined position inside the lower case 5.

[0044] Also, in the assembly process of the cable winding device 1, a cable winding body creating step S1 of winding the FFC 2 around the shaft 3 to create a cable winding body 10, and a cable winding body mounting step S2 of mounting the cable winding body 10 at a predetermined position inside the lower case 5 are performed.

[0045] According to such a cable winding device 1 and its assembly method, the FFC 2 can be easily wound around the shaft 3, and thus the assemblability of the cable winding device 1 can be improved.

[0046] Specifically, according to the cable winding device 1 according to the present invention, it is possible to wind the FFC 2 around the shaft 3 with the shaft 3 removed from the lower case 5. Therefore, when winding the FFC 2, it is not necessary to bypass the peripheral wall portion 52 of the lower case 5, so it is possible to guide the FFC 2 perpendicular to the shaft 3 and wind it by rotating the shaft 3. Therefore, the FFC 2 can be easily wound around the shaft 3. Also, regarding the automation of the same operation, it is possible to attach the shaft 3 to the drive shaft S and rotate it to wind the FFC 2 around the shaft 3. Therefore, it is easy to automate the operation of winding the FFC 2 around the shaft 3. Thus, it is possible to improve the assemblability of the cable winding device 1.

[0047] In addition, in the cable winding device 1, the housing 4 is composed of a lower case 5 and an upper cover 6 that is fitted to the lower case 5 and closes the opening 5o, and the shaft mounting portion 7 has two fitting portions 71 and 72 that fit the lower end surface 3b of the shaft 3 and the bottom surface 5b of the lower case 5.

[0048] According to such a cable winding device 1, the one obtained by winding the FFC 2 around the shaft 3 (the cable winding body 10 described above) can be mounted at a predetermined position on the bottom surface 5b of the lower case 5. Therefore, while facilitating the operation of winding the FFC 2 around the shaft 3, it is possible to mount the cable winding body 10 created by this operation as a single disk body. As a result, the assemblability of the cable winding device 1 can be improved.

[0049] In addition, in the cable winding device 1, the fitting portions 71 and 72 are composed of fitting holes 34 and 35 provided on the lower end surface 3b of the shaft 3 and fitting shafts 54 and 55 provided on the bottom surface 5b of the lower case 5, and the fitting holes 34 and 35 and the fitting shafts 54 and 55 are inserted and fitted.

[0050] According to such a cable winding device 1, while facilitating the operation of winding the FFC 2 around the shaft 3, it is possible to reliably mount the cable winding body 10 as a single disk body with a simple configuration. As a result, the assemblability of the cable winding device 1 can be improved.

[0051] In addition, in the cable winding device 1, a pair of fitting holes 34 and fitting shafts 54 and another pair of fitting holes 35 and fitting shafts 55 are arranged parallel to each other. Note that the cross-sectional shapes of the fitting holes 34 and 35 and the fitting shafts 54 and 55 are circular, but are not limited thereto.

[0052] According to such a cable winding device 1, the mounting angle of the shaft 3 can be determined. Then, when mounting the shaft 3, the operation of appropriately adjusting the mounting angle of the shaft 3 becomes unnecessary. Further, the shaft 3 will not rotate inadvertently after the shaft 3 is mounted. As a result, it is possible to improve the assemblability of the cable winding device 1.

[0053] In the correspondence between the configuration of this invention and the foregoing embodiment, the cable winding device of this invention corresponds to the cable winding device 1, Similarly hereinafter, The flexible flat cable corresponds to the FFC 2, The shaft body corresponds to the shaft 3, The end face of the shaft body corresponds to the lower end face 3b, The housing corresponds to the housing 4, The lower case corresponds to the lower case 5, The bottom surface of the lower case corresponds to the bottom surface 5b, The upper cover corresponds to the upper cover 6, The back surface of the upper cover corresponds to the back surface 6b, The shaft body mounting portion corresponds to the shaft body mounting portion 7, The cable winding body corresponds to the cable winding body 10, The fitting recess corresponds to the fitting holes 34, 35, The fitting convex portion corresponds to the fitting shafts 54, 55, The fitting portion corresponds to the fitting portions 71, 72, The step of creating the cable winding body corresponds to the cable winding body creation step S1, The step of mounting the cable winding body at a predetermined position inside the housing corresponds to the cable winding body mounting step S2. However, this invention is not limited only to the configuration of the foregoing embodiment, and many embodiments can be obtained.

[0054] For example, in the cable winding device 1, the outer peripheral surface 3c of the shaft 3 is formed in a cylindrical shape except for the slit inlet described above. However, as shown in FIG. 10, a flange portion 36 extending in the radially outer direction may be provided at the corner between the outer peripheral surface 3c of the shaft 3 and its respective end surfaces 3t, 3b. Note that the flange portion 36 may be provided at the corner on either one side or at the corners on both sides.

[0055] According to the cable winding device 1 according to such an embodiment, when the FFC 2 is wound around the shaft 3, the FFC 2 can be guided perpendicular to the shaft 3 by making the FFC 2 follow the flange portion 36. Therefore, it is possible to wind the FFC 2 without deviation. Accordingly, the operation of winding the FFC 2 around the shaft 3 becomes easier. In addition, it is possible to prevent the FFC 2 wound around the shaft 3 from loosening, deviating, or coming off. As a result, it is possible to improve the assemblability of the cable winding device 1.

[0056] Further, as described above, in the cable winding device 1, a structure is adopted in which a pair of fitting holes 34 and fitting shafts 54 and another pair of fitting holes 35 and fitting shafts 55 are arranged parallel to each other. However, as shown in FIG. 11, a pair of fitting holes 34 and fitting shafts 54 are provided on the central axis C of the shaft 3, and a plurality of positioning fitting holes 35, which are other fitting holes, are provided concentrically with respect to the central axis C of the shaft 3. A positioning fitting shaft 55, which is another fitting shaft, is provided concentrically with respect to the central axis C of the shaft 3, and any one of the positioning fitting holes 35 and the positioning fitting shaft 55 may be inserted and fitted.

[0057] According to the cable winding device 1 according to such an embodiment, the mounting angle of the shaft 3 can be changed (see the arrow R in FIG. 11). Therefore, the winding start position of the FFC 2 wound around the shaft 3 (the position in the circumferential direction of the shaft 3) can be changed. Accordingly, it becomes possible to stepwise change the maximum payout length of the FFC 2. Then, in the cable winding device 1 having specifications with different maximum payout lengths of the FFC 2, it is not necessary to select the FFC 2 having different lengths and wind it. As a result, it is possible to improve the assemblability of the cable winding device 1.

[0058] However, if the mounting angle of the shaft 3 is changed, the phase of the FFC 2 drawn out from the shaft 3 upward will change. Therefore, for the upper cover 6, it is necessary to use one corresponding to the mounting angle of the shaft 3. That is, for the drilling direction of the slit 64, it is necessary to use one corresponding to the mounting angle of the shaft 3. Even considering this point, since the shaft 3 and the lower case 5 are common, it is possible to improve the assemblability.

[0059] Also, as described above, in the cable winding device 1, a structure is adopted in which a pair of fitting holes 34 and fitting shafts 54 and another pair of fitting holes 35 and fitting shafts 55 are arranged parallel to each other. However, as shown in FIG. 12, only a pair of fitting holes 34 and fitting shafts 54 may be provided, and the cross-sectional shapes of the fitting holes 34 and fitting shafts 54 may be formed in a non-circular shape. The non-circular shape shall include a polygonal shape that can be fitted at a predetermined phase. For example, a regular pentagon, a regular hexagon, etc. Also, a key fitting shape shall be included.

[0060] According to the cable winding device 1 according to such an embodiment, the mounting angle of the shaft 3 can be determined. Then, when mounting the shaft 3, it is not necessary to appropriately adjust the mounting angle of the shaft 3. Also, the shaft 3 will not rotate inadvertently after the shaft 3 is mounted. As a result, it is possible to improve the assemblability of the cable winding device 1.

[0061] Further, as described above, in the cable take-up device 1, a structure is adopted in which a pair of fitting holes 34 and fitting shafts 54 and another pair of fitting holes 35 and fitting shafts 55 are arranged parallel to each other. However, as shown in FIG. 13, a pair of fitting holes 34 and fitting shafts 54 may be provided on the central axis C of the shaft 3, and the cross-sectional shapes of the fitting holes 34 and fitting shafts 54 may be formed in a rotationally symmetric shape. The rotationally symmetric shape is a shape that can be fitted at any phase, and includes, for example, a regular polygonal shape in which the lengths of all sides are equal and the angles formed by two sides are also equal. That is, it includes a regular pentagon, a regular hexagon, etc. Further, not only a cross shape and a plus shape but also a star (spline) shape and the like are included.

[0062] According to the cable take-up device 1 according to such an embodiment, the mounting angle of the shaft 3 can be changed (see the arrow R in FIG. 13). Therefore, the winding start position (position in the circumferential direction of the shaft 3) of the FFC 2 wound around the shaft 3 can be changed. Accordingly, it becomes possible to stepwise change the maximum payout length of the FFC 2. Then, in the cable take-up device 1 having different maximum payout lengths of the FFC 2, it is not necessary to select and wind the FFC 2 having different lengths. As a result, the assemblability of the cable take-up device 1 can be improved.

[0063] Furthermore, as described above, in the cable take-up device 1, among the cable winding bodies 10 created by winding the FFC 2 around the shafts 3 having different outer diameters, one selected cable winding body 10 may be provided.

[0064] According to the cable take-up device 1 according to such an embodiment, in the cable take-up device 1 having different maximum payout lengths of the FFC 2, it is possible to make the lower case 5 and the upper cover 6 common. Further, in the cable take-up device 1 having a short maximum payout length of the FFC 2, if the FFC 2 is wound around a shaft 3 having a large outer diameter, the FFC 2 can be accommodated inside the lower case 5 at an appropriate density. Thereby, it is possible to prevent the FFC 2 from hitting the outer peripheral wall 42 of the lower case 5 and generating abnormal noise.

[0065] On the contrary, in a cable winding device where the maximum payout length of FFC2 is long, if FFC2 is wound around a shaft 3 with a small outer diameter, it becomes possible to accommodate FFC2 at an appropriate density inside the lower case 5. This can prevent the outer peripheral wall 42 of the lower case 5 and adjacent FFC2s from rubbing against each other and inhibiting smooth winding or payout.

Explanation of Signs

[0066] 1…Cable winding device 2…Flexible flat cable 3…Shaft 4…Housing 5…Lower case 6…Upper cover 7…Shaft mounting part 10…Cable winding body 34…Fitting hole 35…Fitting hole 54…Fitting shaft 55…Fitting shaft 71…Fitting part 72…Fitting part 3b…Lower end face of the shaft 5b…Bottom surface of the lower case 6b…Back surface of the upper cover S1…Cable winding body creation process S2…Cable winding body mounting process

Claims

1. A flexible flat cable, a shaft body for fixing the flexible flat cable, and a cable winding device including a housing for housing the shaft body and the flexible flat cable wound around the shaft body, wherein a shaft body mounting portion is provided to enable mounting of the shaft body at a predetermined location inside the housing, the housing is composed of a lower case and an upper cover fitted to the lower case to close an opening, the shaft body mounting portion has a fitting portion that fits the end face of the shaft body and at least the bottom face of the lower case or the back face of the upper cover facing the bottom face, the fitting portion is provided on one side of the opposing faces and includes a fitting recess bored in the fitting direction, and a fitting protrusion that is shaft-shaped, provided on the other side of the opposing faces and extending along the fitting direction, the fitting recess and the fitting protrusion are inserted and fitted so that the shaft body does not rotate relative to the housing, only a pair of the fitting recesses and the fitting protrusions are provided, the cross-sectional shapes of the fitting recess and the fitting protrusion are formed in a non-circular shape, a pair of the fitting recesses and the fitting protrusions are provided on the central axis of the shaft body, and the cross-sectional shapes of the fitting recess and the fitting protrusion are formed in a rotationally symmetric shape cable winding device.

2. The cable winding device according to claim 1, wherein a flange portion extending in the radially outer direction is provided at a corner between the peripheral surface and the end face of the shaft body.

3. The cable winding device according to claim 1 or 2, comprising one selected cable winding body among cable winding bodies created by winding the flexible flat cable around the shaft body having different outer diameters.

4. A method for assembling a cable winding device including a flexible flat cable, a shaft body for fixing the flexible flat cable, and a housing for housing the shaft body and the flexible flat cable wound around the shaft body, the method including: a step of winding the flexible flat cable around the shaft body to create a cable winding body; and a step of mounting the cable winding body on a shaft body mounting portion provided at a predetermined location inside the housing, wherein the housing is composed of a lower case and an upper cover fitted to the lower case to close an opening. ​ ​ ​ ​ ​ The shaft body mounting portion has a fitting portion that fits the end face of the shaft body and at least the bottom surface of the lower case or the back surface of the upper cover facing the bottom surface. The fitting portion is provided on one side of the opposing surfaces and includes a fitting recess bored in the fitting direction, and a fitting protrusion that is shaft-shaped, provided on the other side of the opposing surfaces and extending along the fitting direction. In the step of mounting the cable winding body to the shaft body mounting portion, the fitting recess and the fitting protrusion are inserted and fitted so that the shaft body does not rotate with respect to the housing. Only a pair of the fitting recesses and the fitting protrusions are provided. The cross-sectional shapes of the fitting recess and the fitting protrusion are formed in a non-circular shape. A pair of the fitting recesses and the fitting protrusions are provided on the central axis of the shaft body. The cross-sectional shapes of the fitting recess and the fitting protrusion are formed in a rotationally symmetric shape Assembly method of a cable take-up device.

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