JPH0644077U - Transmission device between rotating body and fixed body - Google Patents

Abstract

(57) [Summary] [Structure] The winding body portion 11a of the rotating body 11 and the winding body portion of the fixed body 12 are arranged on the same axis with a partition plate 13 which can freely rotate between them. A flat cable 14 having one end fixed to the winding body portion 11a of the rotating body and the other end fixed to the winding body portion of the fixed body is wound around both winding body portions so that a winding direction reversing portion 14c can be formed midway in the longitudinal direction. To do. The partition plate 13 is provided with a cutout portion 15 that allows the winding direction reversal portion 14c to pass therethrough, and a restraining member 16 that regulates the maximum winding diameter of the flat cable 14. [Effect] Since both the rotating body and the fixed body have a structure in which the flat cable is wound around the winding barrel, slack in the flat cable is less likely to occur, and troubles due to the slack in the flat cable can be prevented. The overall outer diameter can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transmission device used for transmitting electric signals, optical signals, etc. between a rotating body and a fixed body.

[0002]

[Prior art]

 FIG. 5 shows a conventional transmission device between a rotating body and a fixed body. In this transmission device, an inner case 1 and an outer case 2 coaxially arranged are rotatably combined with each other, and a winding direction is provided midway in the longitudinal direction in a space formed by the inner case 1 and the outer case 2. This is a structure in which a spirally wound flat cable 3 having an inversion portion 3c is housed. The inner end 3a of the flat cable 3 is fixed to the inner case 1, and the outer end 3b is fixed to the outer case 2.

This device operates as follows. First, when the inner case 1 is rotated in the direction of arrow A while the outer case 2 is fixed from the state of FIG. 5, the flat cable 3 is wound around the inner case 1, and accordingly, the flat cable 3 is rotated. The winding direction reversing portion 3c moves in the direction of the arrow B, and the flat cable 3 wound inside the outer case 2 successively passes through the winding direction reversing portion 3c to be wound on the inner case 1. It is wound around the outer peripheral surface of the cable 3. In this way, the inner case 1 can be rotated in the direction of arrow A until the flat cable 3 is almost completely wound around the inner case 1.

Further, when the inner case 1 is rotated in the direction of arrow C while the outer case 2 is fixed from the state of FIG. 5, the flat cable 3 on the inner case 1 is unwound, and accordingly, the flat cable 3 is wound. The direction reversing portion 3c moves in the direction of arrow D, and the flat cable 3 wound on the inner case 1 is sequentially passed through the winding direction reversing portion 3c and wound on the inner side of the outer case 2. It is rolled up on the inner surface of No. 3. In this way, the inner case 1 can be rotated in the direction of arrow C until the flat cable 3 is almost entirely wound inside the outer case 2.

The transmission device between the rotating body and the fixed body configured as described above has an advantage that a transmission line having high reliability can be configured because there is no sliding connection portion.

[0006]

[Problems to be solved by the device]

 The transmission device configured as described above has no particular problem when the inner case 1 is rotated in the direction of arrow A to wind the flat cable 3 around the inner case 1, but the inner case 1 is rotated in the direction of arrow C. The following problems are likely to occur when the flat cable 3 is unwound from the inner case 1 and wound inside the outer case 2.

That is, when the inner case 1 is rotated in the direction of arrow C, the slack occurs in the flat cable 3 wound around the inner case 1 without the winding direction reversing portion 3c moving in the direction D. When the slack is generated, the slack is accumulated in the space inside the flat cable 3, and the slack eventually interferes with the winding direction reversing portion 3c and becomes unrotatable.

Further, the inner case and the outer case are arranged at the same position in the axial direction, and the structure is such that a spiral wound flat cable having a winding direction reversal part is housed in the space formed between them. However, the overall outer diameter becomes large, and the overall outer diameter may become a problem in relation to the installation space.

[0009]

[Means for Solving the Problems]

 The present invention provides a transmission device between a rotating body and a fixed body, which solves the above problems, and has a structure in which a rotating body and a fixed body having a flat cable winding body are provided. Are arranged on the same axis by shifting in the axial direction, and a partition plate that can freely rotate is placed at the boundary between the winding barrels of both, and one end of the flat cable is fixed to the winding barrel of the rotating body and the other end is fixed. The flat cable is fixed to the winding body of the body, and the flat cable is wound around the winding body of the rotating body and the fixed body to form a winding direction reversal part in the middle of the longitudinal direction. The present invention is characterized in that a notch portion is formed to pass through the winding direction reversal portion of the cable, and a restraint member that restricts the maximum winding diameter of the flat cable is provided.

[0010]

[Action]

 In this device, when the rotating body is rotated in the winding direction of the flat cable, the winding direction reversal part of the flat cable is pulled by it and moves in the same direction. The flat cable wound around the coil passes through the winding direction reversal part in sequence and is wound around the winding body of the rotating body. Conversely, when the rotating body is rotated in the direction that unwinds the flat cable wound around the winding body, the flat cable rotates with the maximum winding diameter being restricted by the restraining member, and the winding direction is reversed. As it is pushed out to the winding part, the winding direction reversing part moves in the same direction as the rotating body, whereby the flat cable wound around the winding body part of the rotating body passes through the winding direction reversing part and the winding body of the fixed body. Wrapped around the club. In this way, reciprocating rotation of the rotating body is possible.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 show an embodiment of the present invention. This transmission device includes a rotating body 11 having a winding body portion 11a, a fixed body 12 having a winding body portion 12a, a disk-shaped partition plate 13, and a flat cable 14.

The winding barrels 11a and 12a have the same diameter, and the rotating body 11 and the fixed body 12 are arranged on the same axis by shifting the winding barrels 11a and 12a in the axial direction, and are relatively rotatable. Are combined with. Further, the partition plate 13 is arranged at the boundary between the winding drum portions 11a and 12a, and can freely rotate regardless of the rotating body 11 and the fixed body 12.

The flat cable 14 has one end 14a (see FIG. 3) fixed to the winding body 11a of the rotating body and the other end 14b (see FIG. 3) fixed to the winding body 11b of the fixed body. One end side is wound around the winding body portion 11a of the rotating body and the other end side is wound around the winding body portion 11b of the fixed body so that a winding direction reversing portion 14c is formed in the middle of the direction.

Further, the partition plate 13 has a notch portion 15 that allows the winding direction reversing portion 14a of the flat cable 14 to pass through in a part of the circumferential direction, and regulates the maximum winding diameter of the flat cable 14 on both sides. A restraining member 16 is provided so as to project.

Next, the operation of this device will be described. In FIG. 1, when the rotating body 11 rotates counterclockwise, the flat cable 14 is wound around the winding body 11a (see FIG. 2), so that the flat cable winding direction reversing portion 14c moves counterclockwise. (The moving speed is slower than that of the rotating body 11.) As a result, the flat cable 14 wound around the winding body portion 12a of the fixed body is unwound and passes through the winding direction reversing portion 14c to wind the winding body of the rotating body. The process moves to section 11a. At this time, the partition plate 13 receives a rotational force from the winding direction reversing portion 14c passing through the notch portion 15 and rotates in the same direction as the winding direction reversing portion 14c at the same speed.

On the contrary, when the rotating body 11 rotates in the clockwise direction, the flat cable 14 wound around the winding body portion 11a is unwound while the maximum outer diameter is restricted by the restraining member 13, and is wound. Since it is fed to the direction reversing unit 14c, the winding direction reversing unit 14c moves clockwise (moving speed is slower than that of the rotating body 11), whereby the flat cable 14 that has passed through the winding direction reversing unit 14c is wound on the fixed body 12. It is wrapped around the body 12a. Also at this time, the partition plate 13 receives the rotational force from the winding direction reversing portion 14c passing through the notch portion 15 and rotates in the same direction as the winding direction reversing portion 14c at the same speed.

The reciprocating rotation of the rotating body 11 is performed in this manner. Although the flat cable 14 is wound as shown in FIG. 3 in the above embodiment, the flat cable 14 may be wound as shown in FIG. 4 without being limited to this.

[0018]

[Effect of device]

 As described above, according to the present invention, since both the rotating body and the fixed body have a structure in which the flat cable is wound around the body, the slack of the flat cable is less likely to occur and troubles due to the slack of the flat cable can be prevented. At the same time, the overall outer diameter can be reduced, which is advantageous in that the device can be downsized.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a transmission device between a rotating body and a fixed body according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the transmission device of FIG.

FIG. 3 is a perspective view showing how to wind a flat cable of the transmission device of FIG.

FIG. 4 is a perspective view showing another example of how to wind a flat cable in the transmission device of the present invention.

FIG. 5 is a cross-sectional view showing a conventional transmission device between a rotating body and a fixed body.

[Explanation of symbols]

 11: Fixed body 11a: Winding body part 12: Rotating body 12a: Winding body part 13: Partition plate 14: Flat cable 14c: Winding direction reversing part 15: Notch part 16: Restraint member

Claims (1)

[Scope of utility model registration request] 1. A flat cable winding body having a winding body portion and a fixed body are arranged on the same axis with their winding body portions displaced in the axial direction, and are freely rotated at the boundary between the winding body portions. A possible partition plate is arranged, and one end of the flat cable is fixed to the winding body of the rotating body and the other end is fixed to the winding body of the fixed body, and the flat cable has a winding direction inversion part in the middle of the longitudinal direction. As much as possible, the main body is wound around the winding body of the rotating body and the fixed body, and further, the partition plate is formed with a notch for passing the winding direction reversal portion of the flat cable, and the maximum winding diameter of the flat cable is regulated. A transmission device between a rotating body and a fixed body, which is provided with a restraining member.