JPH0541088U - Transmission device between rotating body and fixed body - Google Patents

Abstract

(57) [Summary] [Structure] Use of the band-shaped transmission line 11 inside the upper part in the usage state of the fixed case 12, which consists of the band-shaped transmission line 11 wound in a spiral shape, the fixed case 12, and the rotating case 13. A spring member (14) for pressing the outer peripheral surface of the upper part in the state downward with spring pressure was attached. [Effect] Since the band-shaped transmission line is pushed downward by gravity and the spring member in the case, free movement is suppressed,
It is possible to prevent the generation of abnormal noise. Since the spring member only needs to lightly press the band-shaped transmission line, which is biased downward by its own weight, from the upper part, a small spring pressure is required and the rotational operation force can be lightened. Since the spring pressure is applied in one direction from the fixed case side, unevenness in the rotational operation force does not occur.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transmission device used for transmitting an electric signal, an optical signal, electric power or the like between a rotating body and a fixed body.

[0002]

[Prior Art]

 Conventionally, for example, when transmitting a signal between a steering shaft side (rotating body) and a column side (fixed body) of an automobile, a transmission device as shown in FIGS. 7 and 8 is used ( No. 62-168581 gazette).

This transmission device includes a band-shaped transmission line 11 wound in a spiral shape, a fixed case 12 arranged on the outer peripheral side thereof, and a rotating case 13 arranged on the inner peripheral side. The fixed case 12 is attached to a fixed body, and the rotating case 13 is attached to a rotating body that rotates in the fixed body. The outer end of the strip-shaped transmission line 11 is attached to the fixed case 12, is pulled out from it and connected to the equipment on the fixed body side, and the inner end of the strip-shaped transmission line 11 is attached to the rotating case 13 and pulled out therefrom. Connected to the device on the rotating body side.

With the above structure, the rotating case 13 can rotate in both directions with respect to the fixed case 12 within a range in which the band-shaped transmission line 11 can be tightened and unrolled. Therefore, the signal can be transmitted between the fixed body and the fixed body. This transmission device has the advantage that it can form a highly reliable transmission line because it has no sliding contact portion.

[0005]

[Problems to be solved by the device]

 The spirally wound band-shaped transmission line 11 is wound around the rotating case 13 when it is tightened to the limit, and conversely when it is unfolded to the limit, the elastic properties of its own inside the fixed case 12. It will be in a state where it sticks to, and is stable, respectively, but when it is in the middle, it can move freely in cases 12, 13 and becomes an unstable state.

For this reason, when this device is used by incorporating it into an automobile or the like, when the band-shaped transmission lines are subjected to vibration while in a middle state, collision occurs between the band-shaped transmission lines or between the band-shaped transmission lines and the case. There is a drawback that an abnormal noise is generated and the user feels uncomfortable.

As a means for eliminating the abnormal noise, a spring member for pushing the inner peripheral surface or the outer peripheral surface of the spirally wound band-shaped transmission line in the radial direction is provided in the fixed case or the rotating case to prevent the band-shaped transmission line from moving. A method of suppressing free movement has been proposed (Japanese Utility Model Publication No. 3-55686). However, while this method is effective in preventing abnormal noise, it is liable to cause problems such as heavy rotational operation force and uneven rotational operation force.

[0008]

[Means for Solving the Problems]

 The present invention provides a transmission device between a rotating body and a fixed body that solves the above problems. As shown in FIG. 8, this type of transmission device is used in a state in which it is perpendicular to the rotation center axis A of the rotating body. Therefore, when the rotation center axis A is inclined like the steering shaft of an automobile, The band-shaped transmission line 11 in the intermediate state is biased downward in the cases 12 and 13 due to gravity.

Therefore, the present invention is provided with a band-shaped transmission line wound in a spiral shape, a fixed case arranged on the outer peripheral side thereof, and a rotating case arranged on the inner peripheral side, and the outer end portion of the band-shaped transmission line is provided. Is attached to the fixed case, the inner end is attached to the rotating case, and the rotating case is rotatable with respect to the fixed case. It is characterized in that a spring member is attached which pushes the outer peripheral surface of the upper part of the wound band-shaped transmission line downward with spring pressure.

[0010]

[Advantage] By doing so, the strip-shaped transmission line in the intermediate state is pushed downward by gravity and spring pressure, and is stabilized in a state of being biased downward in the case, so that the strip-shaped transmission line can be moved with a small spring pressure. It is suppressed, and the generation of abnormal noise can be prevented. Also, since the spring pressure is small, the rotational operation force is light, and since the spring pressure is applied in a fixed direction from the fixed case side, there is no unevenness in the rotational operation force.

[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 is also the same as the conventional one in that the band-shaped transmission line 11 wound in a spiral shape is housed between the fixed case 12 on the outer peripheral side and the rotating case 13 on the inner peripheral side. A feature of this transmission device is that a spring member 14 is attached to the inside of the upper part of the fixed case 12 in use, in which the spring outer peripheral surface of the spirally wound band-shaped transmission line 11 in use is pressed downward by spring pressure. is there.

The spring member 14 has a shape as shown in FIG. 4, the base end of which is fixed to the upper part of the fixed case 12 in use, and the end of which is attached to the outer peripheral surface of the spirally wound transmission line 11. The strip-shaped transmission line 11 is pressed downward by the elastic force due to the contact. It is preferable to use a liquid crystal polymer plate having a thickness of about 0.5 mm as the spring member 14, but other spring materials such as polyester, stainless steel, and phosphor bronze can also be used.

The band-shaped transmission line 11 is as shown in FIG. 1 when it is in an intermediate state, as shown in FIG. 2 when it is tightened, and as shown in FIG. 3 when it is unrolled. In other words, when the belt-shaped transmission line 11 is in the intermediate state, it is pushed down by gravity and the spring member 14 and its free movement is suppressed, so that abnormal noise due to collision can be prevented and gravity is used, so that the spring is used. The spring pressure of the member 14 may be light, and the rotational operation force can be lightened. Further, since the spring pressure is applied in one direction from the fixed case 12 side, unevenness in the rotational operation force does not occur.

FIG. 5 shows another embodiment of the present invention. In this transmission device, two spring members 14 having a shape as shown in FIG. 6 are attached to the inside of the upper portion of the fixed case 12 in use, and the spring pressure pushes the upper outer peripheral surface of the strip-shaped transmission line 11 downward. It was done like this. The other configurations and operations are the same as those in the above-described embodiment, and thus the description thereof will be omitted.

[0015]

[Effect of the device]

 As described above, according to the present invention, the spirally wound band-shaped transmission line is pushed downward in the case by gravity and the spring member, and the free movement is suppressed. This eliminates the collision of cases and prevents the generation of abnormal noise. Further, since the spring member only needs to lightly press the band-shaped transmission line, which is biased downward by its own weight, from the upper part, a small spring pressure is required and the rotational operation force can be lightened. Furthermore, the spring pressure is applied in one direction from the fixed case side, so there is no unevenness in the rotational operation force.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a transmission device according to an embodiment of the present invention when a strip-shaped transmission line is in an intermediate state.

FIG. 2 is a cross-sectional view of the device of FIG. 1 when the strip-shaped transmission line is in a tightly wound state.

FIG. 3 is a cross-sectional view of the device of FIG. 1 when the strip-shaped transmission line is in a rolled-up state.

4 is a perspective view of a spring member used in the apparatus of FIG.

FIG. 5 is a cross-sectional view of a transmission device according to another embodiment of the present invention when a strip-shaped transmission line is in an intermediate state.

6 is a perspective view of a spring member used in the apparatus of FIG.

FIG. 7 is a sectional view of a conventional transmission device in a direction perpendicular to an axis.

8 is a sectional view in the axial direction of the device of FIG. 7 in use.

[Explanation of symbols]

11: Band-shaped transmission line 12: Fixed case 13: Rotating case
14: Spring member

Claims (1)

[Scope of utility model registration request] 1. A band-shaped transmission line wound in a spiral shape, a fixed case arranged on the outer peripheral side thereof, and a rotating case arranged on the inner peripheral side, the outer end of the band-shaped transmission line being a fixed case. In the transmission device in which the inner end is attached to the rotating case, and the rotating case is rotatable with respect to the fixed case, the main case is wound inside the upper portion of the fixed case in a used state. A transmission device between a rotating body and a fixed body, characterized in that a spring member is attached to push an upper outer peripheral surface downward with a spring pressure when the strip-shaped transmission line is used.