JPH04226282A - Cable reel - Google Patents

Abstract

PURPOSE:To shorten the length of a needed cable while to prevent the reversal part of the cable from buckling. CONSTITUTION:A flexible cable 32 is wound around the outer tube part 35 and the inner tube part 36 in mutually reverse directions via a reversal part 32a while the reversal part 32a positioned in a turning neutral position is set so as to be apart from a first connector 39 for the purpose of leading out the flexible cable 32 to the exterior of the outer tube part 35.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable reel used in an automobile steering system, etc., for electrically connecting a fixed body and a movable body using a cable.

0002

[Prior Art] A cable reel is a device in which a fixed body and a movable body rotatably attached to the fixed body are connected by a flexible cable. It is used as an electrical connection device between a movable body and a fixed body, which have a finite number of rotations, such as.

Conventionally, as a cable reel of this type, a flat case in which a plurality of conductors are laminated onto a pair of strip-shaped films is placed in a cable storage section provided between a fixed body and a movable body. - A flat cable is loosely stored in a spirally wound state, and one end of this flat cable is attached to an outer cylinder part provided on either the fixed body or the movable body, and the other end is attached to the other member. There are known types that are fixed to the inner cylindrical part.

[0004] When the movable body is rotated, this cable reel winds the flat cable stored in the cable storage part into the inner cylinder part, or winds it into the outer cylinder part depending on the direction of rotation. It can be rolled back to the side. Therefore, in the range where the flat cable is completely rewound to the outer cylinder side, almost no tension is applied to the flat cable, and there is no tension between the relatively rotating fixed body and movable body. Electrical connection can be maintained at all times.

[0005]

[Problems to be Solved by the Invention] The cable reel having the above structure uses the difference in diameter between the outer cylindrical part and the inner cylindrical part to wind in and unwind the flat cable. Assuming that the diameter is constant, the length of the flat cable to be used can be shortened as the difference in diameter increases. However, the diameter of the inner cylinder is uniquely determined by the diameter of the rotating shaft to which the cable reel is attached, for example, the steering shaft of an automobile, while the diameter of the outer cylinder is determined by the diameter of the rotating shaft to which the cable reel is attached, for example, the diameter of the outer cylinder is limited due to the need to downsize the device. Therefore, the difference in diameter between the outer cylinder part and the inner cylinder part cannot be made very large. For this reason, this type of cable
Generally, long flat cables are required, and as is well known, long flat cables are difficult to manufacture, resulting in an increase in the total cost of the cable reel.

The present invention has been made in view of the actual state of the prior art, and its purpose is not only to significantly shorten the length of the required cable, but also to It is an object of the present invention to provide a cable reel that can prevent cable buckling and breakage due to bending fatigue.

[0007]

[Means for Solving the Problems] It is an object of the present invention to provide a concentric fixed-side cable storage groove and a movable-side cable storage groove in a cable storage section defined between a fixed body and a movable body. - A cable storage groove is provided facing the fixed side cable storage groove and the movable side cable storage groove so that cables consisting of a plurality of linear cables are separated and independent from each other. The cable is wound in one direction, and the remaining part is reversed and wound in the opposite direction in the other direction, and the radius of curvature of the reversed part of the cable at the rotational neutral position is large. achieved by.

[0008] It is also an object of the present invention to connect a cable through an inverted part between an inner cylinder part provided on one of the fixed body and the movable body and an outer cylinder part provided on the other. This is achieved by winding the cable in the opposite direction and configuring the reversed portion of the cable to have a large radius of curvature at the neutral rotational position.

[0009]

[Operation] When assembling the cable reel to the steering device of a car, the steering wheel is mostly used at the center of its rotational range, so the movable body that rotates in conjunction with the steering wheel is used. It is also in the rotational neutral position most of the time during use. In this case, bending stress acts on the reversed part of the cable wound in the cable storage part, but since the radius of curvature of the reversed part is designed to be large, There is no risk that the section will buckle or break due to bending fatigue.

In use, when the movable body connected to the steering wheel is rotated in either the forward or reverse direction,
By moving the reversed part in the same direction, the cable
It is fed out in the tightening direction or the unwinding direction.

[0011]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. 1 and 2 are exploded perspective views of a cable reel according to a first embodiment of the present invention, FIG. 3 is a plan view thereof, FIG. 4 is a longitudinal sectional view thereof, and FIG. 5 is a bottom view of the upper case. , FIG. 6 is a perspective view showing the stored state of the gear, FIG. 7 is an explanatory view showing the winding state of the flexible cable, and FIG. 8 is an explanatory view of the operation of the flexible cable.

As shown in FIGS. 1 to 4, the cable reel consists of a lower case 1, an upper case 2 rotatably held relative to the lower case 1, and both of these. A spacer 3 rotatably held between cases 1 and 2, and this spacer 3
It is generally constructed of a gear 4 for rotationally driving the case 1, and a linear flexible cable 5 wound between the cases 1 and 2.

The lower case 1 has a bottom plate 7 with a center hole 6 in the center, and an inner cylinder part 8 and an outer cylinder part 9 that stand up on the inner and outer peripheries of the bottom plate 7. It is shaped like a cylinder with a bottom. On the bottom plate 7, a plurality of jetties 10 are concentrically arranged around the center hole 6, and adjacent jetties 10 form a plurality of (five in this embodiment) concentric first rows. - A bull storage groove 11 is formed. A cable outlet hole 27 (see FIG. 7) is formed at the bottom of each of the first cable storage grooves 11, and a cable outlet hole 27 (see FIG. 7) is provided at the bottom of each of the first cable storage grooves 11. On the bottom plate 7,
A first rack 12 that meshes with a gear 4, which will be described later, is formed into a ring shape in plan view.

As shown in FIGS. 1 and 5, the upper case 2
has a top plate 14 with a center hole 13 in the center,
It is rotatably connected to the lower case 1 by being snap-fitted to the inside of the inner cylindrical portion 8. Said top plate 1
4 includes a plurality of jetties 1 centered around the center hole 13.
5 are vertically arranged concentrically, and a plurality of (5 in this embodiment) concentric second cable storage grooves 16 are formed by adjacent jetties 15. This second cable storage groove 16 and the first cable storage groove 11 face each other with a spacer 3, which will be described later, in between, and the upper part of each second cable storage groove 16 also has a cable. A bull outlet hole 17 is bored. Furthermore, a second rack 18 having a ring shape in plan view is formed on the periphery of the top plate 14, and the gear 4 meshes with this second rack 18 as well.

The spacer 3 is made of a material with excellent lubricity, such as a synthetic resin molding, and has a disc shape with an opening 19 in a part thereof, and is connected to the first case of the lower case 1. - It is rotatably held between the cable storage groove 11 and the second cable storage groove 16 of the upper case 2. As shown in FIG. 6, a shaft-like body 20 having two arms is inserted into the opening 19, and a first roller 21 and a second roller 22 are rotatably attached to each arm. It is pivoted on. This first roller 2
The gear 4 is press-fitted into one end of the rack 1, and as described above, the gear 4 is connected to the first and second racks 1.
2 and 18, respectively.

The flexible cable 5 is made of a so-called round wire cable in which a conducting wire is covered with an insulator, and in this embodiment, five round wire cables are used. As shown in FIGS. 4 and 7, these flexible cables 5 are wound in each of the first cable storage grooves 11 of the lower case 1, and one end thereof passes through the opening 19. second row
The cable 22 is turned around about half a turn (hereinafter referred to as the turning part 5a), and the other end is wound along each of the opposing second cable storage grooves 16 of the upper case 2. One end of these flexible cables 5 is connected to the lower case 1 through the cable outlet hole 27.
After being bent into a crank shape and fixed in a holder 23 attached to the lower surface of the bottom plate 7 of the lower case 1, the cables are bundled together and connected to the lower connector 24. On the other hand, the other end of these flexible cables 5 is
The holder 2 is led out of the upper case 2 through the cable lead-out hole 17 and is attached to the top surface of the top plate 14 of the upper case 1.
After being bent into a crank shape and fixed within 5, they are bundled together and connected to the upper connector 26. As shown in FIG. 7, the flexible cable 5 has a half-loop bulge at both ends of the flexible cable 5 as it is bent almost at right angles toward the cable outlet holes 17 and 27. A drawer portion 5b is formed.

Next, taking as an example the case where the lower case 1 is used as a fixed body and the upper case 2 is used as a movable body, the operation of the cable reel according to the above embodiment will be mainly explained. Figure 8
The explanation will be based on. In addition, FIG. 8 shows each flexible cable 5.
This figure schematically shows one of the parts, and the lower case 1, upper case, spacer 3, etc. are not shown.

FIG. 8(a) shows that one flexible cable 5 is inserted into the first cable storage groove 11 of the lower case 1 and the second cable storage groove 16 of the upper case 2. The cable reel is in a neutral state with approximately the same amount of winding, and the cable reel is in a neutral state in relation to the steering device to which it is attached (i.e., the steering wheel is mostly used near the center of its rotatable range). ), and is most frequently used in such neutral conditions. In this case, as shown in FIG.
a is set to be sufficiently far away from the pull-out portions 5b at both ends, and is designed to prevent the reversible portion 5a from being pressed by the pull-out portions 5b.

When the upper case 2 is rotated a predetermined amount clockwise (in the direction of arrow A in the figure) from the neutral state of FIG. 8(a),
Racks 12 and 18 for lower case 1 and upper case 2, respectively
The gear 4 that meshes with the upper case 2 revolves in the direction of the arrow A by half the amount of rotation of the upper case 2 while rotating counterclockwise (in the direction of arrow B), and the spacer 3 that pivotally supports the gear 4 rotates on its own axis in the counterclockwise direction (in the direction of arrow B). The gear 4 rotates the same amount in the direction of arrow A. Also, the second
The inverted portion 5a of the flexible cable 5 wound about half a turn around the roller 22 is also moved in the direction of arrow A by the same amount as the spacer 3 (that is, half the amount of rotation of the upper case 2). The flexible cable 5 having a length equal to this movement exits the second cable storage groove 16 of the upper case 2 and is wound into the first cable storage groove 11 of the lower case 1.

In this way, move the upper case 2 in the direction of arrow A.
When rotated, the spacer 3, gear 4 and second roller 2
2 rotates by N/2, and the flexible cable 5 for N/2 turns is wound from the second cable storage groove 16 through the opening 19 into the first cable storage groove 11. Thereafter, as shown in FIG. 8(b), all of the flexible cables 5 wound in the second cable storage groove 16 of the upper case 2 are connected to the first case of the lower case 1. The upper case 2 can be rotated in the direction of arrow A until it is wound into the cable storage groove 11, that is, twice the number of turns of the flexible cable 5 wound around the upper case 2.
This position is the end position of the upper case 2 in the clockwise direction.

Contrary to the above, when the upper case 2 is rotated counterclockwise (direction of arrow C) from the state shown in FIG. 8(a), the gear 4 is rotated clockwise (direction opposite to arrow B). The flexible cable 5, which has a length equal to the amount of revolution of the gear 4, is attached to the lower case as shown in FIG. 8(c). - The first cable storage groove 11 of the case 1 passes through the opening 19 and is wound into the second cable storage groove 16 of the upper case 2.

Note that during the above operation, when the inverted part 5a of the flexible cable 5 passes through the drawn-out part 5b, it is pressed by the drawn-out part 5b and the radius of curvature of the inverted part 5a becomes small.
The frequency of this is extremely low, and the reversing part 5
There is no risk that a will buckle or break due to bending fatigue.

In this way, in the above-mentioned embodiment, since it is sufficient to provide the flexible cable 5 for approximately half the required amount of rotation, the flexible cable 5 can be provided in a smaller amount than the conventional product. It is possible to make the cable extremely short and to use an inexpensive round wire cable as the flexible cable 5, making it possible to significantly reduce the total cost of the cable reel. In addition, since the length of the flexible cable 5 used is short, the diameter of the cable storage part can be reduced, and the cable
This is advantageous for downsizing the bull reel.

Further, concentric first cable storage grooves 11 and second cable storage grooves 16 having the same pitch between the grooves are formed on the opposing surfaces of the lower case 1 and the upper case 2, respectively. These cases
Since the spacer 3 is interposed between the flexible cable storage grooves 11 and 16, it is possible to prevent the flexible cables 5 from getting entangled with each other, and also prevent the single flexible cable 5 from becoming entangled. 1 cable storage groove 11 and 2nd cable storage groove 1
It can also prevent entanglement between flexible cables 5 and 5.
The winding and unwinding can be performed smoothly.

Furthermore, since the gear 4 is pivotally supported on the spacer 3 and is meshed with the ring-shaped racks 12 and 18 formed on the lower case 1 and the upper case 2, the flexibility is improved. The spacer 3 can be made to follow the movement of the reversing portion 5a of the cable 5, so that no unreasonable force is applied to the flexible cable 5, and from this point of view, it is possible to prevent the flexible cable from being entangled. Rewinding can be performed smoothly.

FIG. 9 is a sectional view of a main part of a cable reel according to another embodiment of the present invention, and parts corresponding to those in FIGS. 1 to 8 are designated by the same reference numerals.

This second embodiment differs from the first embodiment described above in that a reinforcing tube 28 is placed over the longitudinal center of the flexible cable 5, and the rest of the structure is basically the same. are essentially the same. According to this embodiment, the stiffness of the inverted portion 5a of the flexible cable 5 in the neutral state, which is most frequently used, can be increased by the reinforcing tube 28. In other words, the stiffness of the reinforcing tube 28 can be utilized. As a result, the radius of curvature of the inverted portion 5a can be increased, and therefore the effect of preventing buckling and bending fatigue of the flexible cable 5 becomes even more reliable. Note that the inverted portion 5a of the flexible cable 5
As a means of increasing the rigidity of the flexible cable 5, instead of the reinforcing tube 28, the covering tube of the flexible cable 5 itself may be partially thickened, or other reinforcing material may be added to the covering tube of the flexible cable 5 itself. It may be installed inside or outside the box.

FIG. 10 is a sectional view of a main part of a cable reel according to still another embodiment of the present invention, in which parts corresponding to those in FIGS. 1 to 8 are given the same reference numerals.

This third embodiment is similar to the first and second embodiments described above.
The difference from the embodiment is that the bottom plate 7 of the lower case 1 and the upper case 2
A bulge 29 is provided on each of the top plate 14 and the top plate 14 to curve outward and protrude, so that the inverted portion 5a of the flexible cable 5 in the neutral state is located between the bulges 29. Yes, the rest of the configuration is basically the same. In this embodiment, since the radius of curvature of the inverted portion 5a of the flexible cable 5 in the neutral position can be increased by the bulging portion 29, the buckling prevention effect of the flexible cable 5 and The effect of preventing bending fatigue can be ensured.

Note that in each of the above embodiments, the first and second
Although the case where the cable storage grooves 11 and 16 are integrally molded into the lower case 1 and the upper case 2 has been described, the space
It is also possible to provide both cable storage grooves 11 and 16 in the spacer 3 by integrally molding jetties 10 and 15 on both the upper and lower surfaces of the spacer 3, or it is possible to provide both cable storage grooves 11 and 16 in the spacer 3.
16 can also be provided on the spacer 3.

In each of the above embodiments, the gear 4 and the first and second racks 12, 1 are used as driving means for the spacer 3.
8 was explained, but instead of this,
For example, if a rubber roller is pivotally supported on the spacer 3,
It is also possible to bring the roller into rolling contact with the opposing surfaces of the lower case 1 and the upper case 2.

Furthermore, in the above embodiment, the case was explained in which five flexible cables 5 and the same number of first and second cable storage grooves 11 and 16 were used. Needless to say, it is not limited. Furthermore, it is not necessary to wind all the flexible cables in the same direction; it is also possible to wind them in two directions, in the forward and reverse directions.In this case, the flexible cables can be used to Since it is possible to rotationally drive the above-mentioned gear 4 and rollers, driving members such as the gear 4 and rollers are not required.

FIG. 11 is an exploded perspective view showing a partially broken cable reel according to a fourth embodiment of the present invention, and FIG. 12 is a plan view showing a part of the upper case of the cable reel with the upper case omitted. 13 is a longitudinal sectional view of the cable reel.

As shown in these figures, the cable reel according to this embodiment includes a lower case 30 and a lower case 30.
The upper case 31 is rotatably held relative to the upper case 31, and a flexible cable 32 is wound between the upper case 30 and the upper case 31.

The lower case 30 has a bottom plate 34 with a center hole 33 in the center, and an outer cylindrical part 35 that stands up on the outer periphery of the bottom plate 34, and is formed into a cylindrical shape with a bottom as a whole. ing. On the other hand, the upper case 31 has a top plate 37 with an inner cylindrical part 36 vertically disposed in the center, and the inner cylindrical part 36 is guided by the center hole 33 and the outer edge of the top plate 37 is guided by the outer cylindrical part 35. As a result, it is rotatably connected to the lower case 30, and the bottom plate 34 and outer cylinder part 35 of the lower case 30 and the top plate 37 and inner cylinder part 36 of the upper case 31 form a ring-shaped cable in plan view. A storage space 38 is defined.

The flexible cable 32 is made of what is called a flat cable, which is made by laminating mutually parallel conducting wires with a pair of insulating films, and in the case of this embodiment, a flat cable in which five conducting wires are buried is used. . Figure 1
2, one end of the flexible cable 32 is connected to a first connector 39 fixed to the inner wall of the outer cylindrical portion 35, and led out to the outside of the lower case 30 via the first connector 39. has been done. On the other hand, the other end of the flexible cable 32 is connected to a second connector 40 fixed to the inner cylindrical portion 36, and led out to the outside of the upper case 31 via the second connector 40. Further, the flexible cable 32 is wound counterclockwise from the first connector 39 to the inner wall of the outer cylinder part 35, and is then reversed into a U-shape (hereinafter referred to as the reversed part 32a), and further It is housed in the space 38 so as to be wound clockwise around the outer wall of the inner cylindrical portion 36 and to reach the second connector 40 . In this case, the flexible cable 32 wound around the inner wall of the outer cylindrical portion 35 is wound with only the portion facing the first connector 39 being slightly biased inward.

Next, the operation of the cable reel according to the fourth embodiment will be described, taking as an example the case where the lower case 30 is used as a fixed body and the upper case 31 is used as a movable body.

FIG. 12 shows a neutral state in which the flexible cable 32 is wound around the outer cylindrical portion 35 of the lower case 30 and the inner cylindrical portion 36 of the upper case 31;
The inverted portion 32a of the first and second connectors 39, 40
The first connector 39 is designed to be sufficiently far away from the first connector 39 so that the first connector 39 does not press the inverted portion 32a. When the upper case 31 is rotated clockwise from the neutral state shown in FIG. 12, the inverted portion 32a of the flexible cable 32
moves clockwise by an amount of rotation smaller than that of the upper case 31, and a flexible cable 32 with a length equal to the amount of rotation is let out from the outer cylinder part 35 side and wound around the inner cylinder part 36 side. Below, the flexible cable 32 wound around the outer cylinder part 35
upper case 31 until all of
can be rotated clockwise, and this position of the upper case 31 is the final position in the clockwise direction.

Contrary to the above, when the upper case 31 is rotated counterclockwise from the position shown in FIG.
The reversible part 32a of No. 2 moves counterclockwise by an amount of rotation smaller than that of the upper case 31, and the flexible cable 32 with a length equal to the amount of rotation is let out from the inner cylindrical portion 36 side, and the outer cylindrical portion 3
It will be rewound to the 5th side. Thereafter, the upper case 31 can be rotated counterclockwise until all of the flexible cable 32 wound around the inner cylindrical part 36 is wound back into the outer cylindrical part 35, and the upper case 31 is rotated in the counterclockwise direction. This is the end position in the clockwise direction.

Note that during the above operation, when the inverted portion 32a of the flexible cable 32 passes through the first connector 39, it is pressed by the first connector 39 and the radius of curvature of the inverted portion 32a becomes somewhat smaller. However, the frequency of this occurrence is small, and there is no risk that the inverted portion 32a will buckle due to the first connector 39, and there is no risk that it will break due to bending fatigue.

As described above, in the fourth embodiment, since the flexible cable 32 is wound in opposite directions around the outer cylindrical part 35 and the inner cylindrical part 36 via the reversible part 32a, the necessary The length of the flexible cable 32 can be extremely shortened, and as a result, the total cost can be reduced and it is advantageous for downsizing.

FIG. 14 is a partially omitted plan view of the upper case of a cable reel according to another embodiment of the present invention, and parts corresponding to those in FIGS. 11 to 13 are given the same reference numerals. be.

This fifth embodiment differs from the fourth embodiment described above in that a reinforcing tube 41 is placed over the inverted portion 32a of the flexible cable 32 at the rotational neutral position to provide a reinforcing portion. The rest of the configuration is basically the same. According to this embodiment, the rigidity of the inverted portion 32a of the flexible cable 32 in the neutral state, which is most frequently used, can be increased by the reinforcing tube 41. In other words, the rigidity of the reinforcing tube 41 is utilized to increase the rigidity of the inverted portion The radius of curvature of the flexible cable 32a can be increased, so that the buckling prevention effect and the bending fatigue prevention effect of the flexible cable 32 are further ensured. In this case, as a means of increasing the rigidity of the inverted portion 32a of the flexible cable 32, instead of the reinforcing tube 41, the covering tube of the flexible cable 32 itself may be partially thickened, or other reinforcing materials may be used. may be provided inside and outside the covering tube of the flexible cable 5 itself to serve as a reinforcing portion.

FIG. 15 is a plan view showing a part of the upper case of a cable reel according to still another embodiment of the present invention, with parts corresponding to those in FIGS. 11 to 13 designated by the same reference numerals. There is.

This sixth embodiment is similar to the fourth and fifth embodiments described above.
The difference from the embodiment is that the outer cylinder part 35 of the lower case 30 is provided with a bulge part 35a that curves and protrudes outward, and a part of the inverted part 32a of the flexible cable 32 in the neutral state is a bulge part. 35a, and the rest of the configuration is basically the same. In this embodiment, since the radius of curvature of the inverted portion 32a of the flexible cable 32 in the neutral position can be increased by the bulging portion 35a, the buckling prevention effect of the flexible cable 32 and the The effect of preventing bending fatigue can be ensured. Note that instead of providing the bulge 35 on the outer cylindrical portion 35, a bulge that curves and protrudes toward the center is provided on the inner cylindrical portion 36 of the upper case 31, so that the inverted portion of the flexible cable 32 in the neutral state is A part of the bulge 32a may be located within this bulge, or the bulge 35a on the outer cylindrical portion 35 side and the bulge portion on the inner cylindrical portion 36 side may be used together.

Further, in the fourth to sixth embodiments described above, a flat cable was used as an example of the flexible cable 32, but instead of that, the so-called round wire cable exemplified in the first to third embodiments may be used. It is also possible to use a flexible cable, in which case a plurality of round wire cables may be integrated into a band shape depending on the number of circuits required.

Furthermore, in the first to sixth embodiments,
The lower case 1 (or 30) is a fixed body, and the upper case 2 (
31) is used as a movable body, but on the contrary, it is also possible to use the upper case as a fixed body and the lower case as a movable body.

[0048]

[Effects of the Invention] As explained above, according to the present invention,
The required length of the cable can be significantly shortened, and by increasing the radius of curvature of the reversed part of the cable at the neutral rotational position, the cable is prevented from buckling and breaking. It is possible to provide a cable reel that is inexpensive and highly reliable.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a cable reel according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the cable reel according to the first embodiment of the present invention.

FIG. 3 is a plan view of the cable reel shown in FIGS. 1 and 2;

FIG. 4 is a longitudinal cross-sectional view of FIG. 3;

5 is a bottom view of the upper case shown in FIG. 1. FIG.

FIG. 6 is a perspective view showing the gear in a stored state.

FIG. 7 is an explanatory diagram showing a winding state of a flexible cable.

FIG. 8 is an explanatory diagram of the operation of the flexible cable.

FIG. 9 is a sectional view of a main part of a cable reel according to a second embodiment of the present invention.

FIG. 10 is a sectional view of a main part of a cable reel according to a third embodiment of the present invention.

FIG. 11 is an exploded perspective view of a cable reel according to a fourth embodiment of the present invention.

FIG. 12 is a plan view showing the upper case of the cable reel shown in FIG. 11 with a portion omitted.

13 is a longitudinal sectional view of the cable reel shown in FIG. 11. FIG.

FIG. 14 is a plan view, with a part omitted, of the upper case of the cable reel according to the fifth embodiment of the present invention.

FIG. 15 is a plan view, with a part omitted, of the upper case of the cable reel according to the sixth embodiment of the present invention.

[Explanation of symbols]

1, 30 Lower case (fixed body) 2, 31 Upper case (movable body) 3 Spacer 4 Gear 5, 32 Flexible cable 5a, 32a Reversing part 5b Drawer part 10, 15 Jetty 11 1st Cable storage groove (fixed side cable storage groove)
12 First rack 16 Second cable storage groove (movable side cable storage groove)
17, 27 Cable outlet hole 18 Second rack 19 Opening 28, 41 Reinforcement tube (reinforcement layer) 29, 35a
Swelling part 35 Outer cylinder part 36 Inner cylinder part 38 Space 39 First connector 40 Second connector

Claims (6)

[Claims] Claim 1: A fixed body, a movable body rotatably attached to the fixed body, and a cable stored in a cable storage section defined by the fixed body and the movable body. In the cable reel, one end of the cable is fixed to the fixed body and led out to the outside, and the other end is fixed to the movable body and led out to the outside. A concentric fixed side cable storage groove and a movable side cable storage groove are provided facing each other, and the cables consisting of a plurality of linear cables are separated and independent from each other. The cable is wound around one of the cable storage groove and the movable side cable storage groove, and the remaining part is reversed and wound in the opposite direction to the other, and the cable is wound to the outside. A cable reel characterized in that each lead-out portion is shifted relative to a reversal portion of the cable at a rotational neutral position. 2. A fixed body, a movable body rotatably attached to the fixed body, and a cable stored in a cable storage section defined by the fixed body and the movable body. In the cable reel, one end of the cable is fixed to the fixed body and led out to the outside, and the other end is fixed to the movable body and led out to the outside. A concentric fixed side cable storage groove and a movable side cable storage groove are provided facing each other, and the cables consisting of a plurality of linear cables are separated and independent from each other. The cable is wound in the opposite direction in either the cable storage groove or the movable side cable storage groove, and the inverted part of the cable at the neutral rotation position is reinforced with higher rigidity than other parts. A cable reel characterized by having layers. 3. A fixed body, a movable body rotatably attached to the fixed body, and a cable stored in a cable storage section defined by the fixed body and the movable body. In the cable reel, one end of the cable is fixed to the fixed body and led out to the outside, and the other end is fixed to the movable body and led out to the outside. A concentric fixed side cable storage groove and a movable side cable storage groove are provided facing each other, and the cables consisting of a plurality of linear cables are separated and independent from each other. The cable is wound around one of the cable storage groove and the movable side cable storage groove, and the remaining part is reversed and wound around the other in the opposite direction, and the fixed body and the movable body are wound. A cable reel characterized in that each opposing surface is provided with a bulge portion projecting outward, and the reversal portion of the cable at a rotational neutral position is located within the bulge portion. . 4. A fixed body, a movable body rotatably attached to the fixed body, and a cable stored in a cable storage section defined by the fixed body and the movable body, In a cable reel in which one end of the cable is fixed to the fixed body and led out to the outside, and the other end is fixed to the movable body and led out to the outside, the cable is provided on either the fixed body or the movable body. The cable is wound in opposite directions around the inner cylindrical part and the outer cylindrical part provided on either of the other through the inverted part, and each lead-out part of the cable to the outside is connected to the inverted part of the cable in the rotational neutral position. A cable reel characterized by being shifted. 5. A fixed body, a movable body rotatably attached to the fixed body, and a cable stored in a cable storage section defined by the fixed body and the movable body, In a cable reel in which one end of the cable is fixed to the fixed body and led out to the outside, and the other end is fixed to the movable body and led out to the outside, the cable is provided on either the fixed body or the movable body. A reinforcing part that is wound in opposite directions around an inner cylinder part and an outer cylinder part provided on either one of the other parts via an inverted part, and has a higher rigidity than other parts at the inverted part of the cable at a rotational neutral position. A cable reel characterized by being provided with. 6. A cable storage device comprising a fixed body, a movable body rotatably attached to the fixed body, and a cable stored in a cable storage section defined by the fixed body and the movable body, In a cable reel in which one end of the cable is fixed to the fixed body and led out to the outside, and the other end is fixed to the movable body and led out to the outside, the cable is provided on either the fixed body or the movable body. The inner cylindrical part and the outer cylindrical part provided on either the other are wound in opposite directions via a reversal part, and a bulging part is provided on the circumferential surface of at least one of the inner cylindrical part and the outer cylindrical part, and this A cable reel characterized in that an inverted portion of the cable at a rotational neutral position is located within the bulge.