JPH09115085A - Rotating device for signal transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for an external motor, reduce the mechanical play of a turntable relative to a load when the turntable is rotated, and to surely transmit signal data regarding a signal source by transmitting and receiving the signal data reagarding the signal source between a base and the turntale in a non-contact state and processing the data. SOLUTION: When electric power is supplied to the stator coil 23b of a motor 23, variation of magnetic flux produced by the stator coil 23b and the magnetic flux of the rotor magnet 23 operate on each other and the turntable 12 rotates on the base 12. Consequently, the angle of rotation of the turntable 12 on the base NO is not limited specially and the turntable 12 can freely rotate. In this case, the signal data regarding the signal source (e.g. video camera) M are transmitted and received as light signal data between the base 10 and turntable 12 in a non-contact state and processed. Therefore, the signal data can securely be sent and received between the base 10 and turntable 12 even if the signal data are digital data, not to mention analog data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a turntable rotatably with respect to a base, and the turntable is provided with a signal source such as a video camera. The present invention relates to a rotating device for signal transmission, which is capable of contactlessly exchanging signal data regarding a signal source.

[0002]

2. Description of the Related Art When a video camera is used to monitor the surroundings, for example, to monitor security, the video camera is installed on a turntable, and the turntable is rotatable with respect to a base. It is like this. As for the video and audio for security shot by a video camera, it is necessary to send signal data as a video signal or audio signal from the rotating base to the base side. In the conventional rotating device for signal transmission of this kind, in order to send the signal data from the rotary base to the base side, it is necessary to pass a transmission path of the signal data through a mechanism portion for rotating the rotary base with respect to the base. is there. Therefore, a flexible printed circuit board is used as a signal data transmission path. A flexible printed circuit board of this kind is set between the rotary table and the base table so as to be loosened so that the rotary table can rotate, for example, 360 ° or more with respect to the substrate.

[0003]

Since such a flexible printed circuit board is set to be considerably longer than the minimum required length between the rotary base and the base so as to be sufficiently loosened, the flexible printed circuit board is It is rarely cut by being directly pulled or twisted. Moreover, the flexible printed circuit board of this type is curled in advance at the rotating portion to reduce the influence of the twist of the flexible printed circuit board itself. However, the amount of rotation of the rotary base with respect to the base is naturally limited, and the limit is that the rotary base can rotate 360 ° with respect to the base.

Instead of using a flexible printed circuit board as such a wired transmission path, a method of transmitting the signal data of the video camera from the rotary base to the base by mechanical contact using a brush or the like is also conceivable. . By using such a contact-type signal transmission path, the rotary base can be rotated several times with respect to the base, but since it is a brush contact type, mechanical contacts naturally exist. Therefore, when the brush of the base is mechanically in contact with the contact ring of the rotating base, a phenomenon such as chattering may occur when the video camera signal is transmitted from the rotating base to the base. As a result, signal deterioration of the signal data of the video camera occurs. Therefore, it is not possible to send analog signal data, especially digital signal data from the rotary base to the base side or vice versa.

When the brush contact type transmission path is used, there is a problem in durability of the brush and the rotating ring.
Moreover, when the brush is weak against changes in humidity and temperature and is rotated for a long period of time, the brush and the ring are chipped, resulting in insulation, which makes it impossible to reliably send signal data, which is not practical. Then, in order to rotate the above-described conventional rotary base with respect to the base, an external motor is used, and the motor is a power transmission component such as a roller, a gear or a belt, and the rotary base is used as the base. It is designed to rotate against. Therefore, since such externally mounted motors and various power transmission components for direct drive are required, the system configuration of the rotating device becomes large, and it is difficult to reduce costs, downsize, and reduce weight.

If power transmission parts such as gears are used,
Control characteristics such as positioning (index) accuracy in the rotational direction deteriorate due to the influence of play such as backlash, and there is a loss of power transmission due to the load of power transmission components, resulting in poor transmission efficiency. Therefore, the present invention has been made to solve the above-mentioned problems, and does not require an external motor, resulting in cost reduction.
(EN) Provided is a rotation device for signal transmission, which can be reduced in size and weight, reduce load and mechanical play when rotating a rotary base, and can reliably transmit signal data regarding a signal source. Has an aim.

[0007]

SUMMARY OF THE INVENTION In the present invention, the above object is to provide a base, a signal source, and a turntable rotatably supported with respect to the base; Non-contact signal transmission processing means for converting signal data relating to a signal source into optical signal data and processing the signals in a non-contact manner between the units,
This is achieved by a rotating device for signal transmission, which includes a rotor magnet provided on the base and a motor configured by a stator coil provided on the base for rotating the turntable with respect to the base. It

In the present invention, the base is rotatable with respect to the turntable. The non-contact signal transmission processing means converts the signal data relating to the signal source into optical signal data between the base and the turntable and exchanges them in a non-contact manner for processing. When the stator coil of the motor is energized, the change of the magnetic flux generated by the stator coil and the magnetic flux of the rotor magnet interact with each other, and the rotary base rotates with respect to the base. By doing so, the rotation angle of the turntable with respect to the base is not particularly limited, and the turntable can freely rotate. In this case, since the signal data regarding the signal source is contactlessly exchanged as optical signal data between the base and the rotary base and processed, analog data as well as digital data can be reliably processed. Signal data can be exchanged between the base and the rotary base. Since the stator coil of the motor is provided on the base and the rotor magnet is provided on the turntable, an external motor for rotating the turntable is unnecessary.

[0009]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limitations are given, the scope of the present invention is not limited to these modes unless otherwise specified to limit the present invention.

FIG. 1 shows a preferred embodiment of a rotating device for signal transmission according to the present invention. FIG. 2 is an exploded perspective view of the rotary device for signal transmission of FIG. 1 and 2, a rotary device for signal transmission includes a base 10, a cylindrical rotary base 12, a non-contact power supply unit 14, a non-contact signal transmission processing means 16, and a built-in motor 23. Have The base 10 is also called a lower support, and the turntable 12 is also called an upper turntable. The base 10, the rotary base 12, the non-contact power supply unit 14, and the non-contact signal transmission processing means 16 are also shown in FIG.

In FIGS. 1 and 2, the base 10 is a portion that is placed on or fixed to a predetermined fixing portion F. A bearing (bearing portion) 8, a driving motor 23, a positioning sensor 15 and the like are mounted on the base 10.
The turntable 12 has a shaft 20, which is rotatably supported by a bearing 8 of the base 10.
The shaft 20 is preferably a cylindrical member having a hollow portion 20a. However, it is of course possible to use a transparent member such as plastic for the shaft 20 instead of using a hollow cylindrical member.

A video camera M as a signal source (data creating means) is detachably mounted on the turntable 12. The rotary table 12 of the rotary device for signal transmission is equipped with a video camera M, and when the rotary table 12 rotates with respect to the base 10, for example, a video monitoring device for security or a conference using a so-called television. It can be used as a system.

The motor 23 is set so as to be built in or attached to the rotary base 12 and the base 10. The motor 23 is composed of a stator coil 23b attached to the coil fixing plate 23c of the base 10 and a rotor magnet 23a embedded in the lower portion 12a of the rotary table 12. The coil fixing plate 23c is used for the stator coil 2
3b serves as a stator yoke, and the lower portion 12a of the turntable 12 serves as a rotor yoke of the rotor magnet 23a.

Therefore, the coil fixing plate 23c is made of a magnetically permeable material such as iron (plate), and similarly, the portion 23d of the turntable 12 is also made of a magnetically permeable material such as iron (plate). The rotor magnet 23a has a ring shape as shown in FIG. 2, and is coaxially arranged on the outer peripheral portion of the current generating coil 34. On the other hand, the stator coil 23b is fixed to the upper part of the coil fixing plate 23c as described above. The stator coil 23b has, for example, 6
Individual pieces are provided and are arranged at substantially equal intervals along the circumferential direction. The motor 23 is, for example, an 8-pole brushless motor in which the N poles and the S poles of the rotor magnet 23a are alternately arranged along the circumferential direction.

The stator coil 23b of this motor 23
Is connected to the motor controller 47e, as shown in FIG. The motor control unit 47e is connected to the microcomputer 100, the power supply circuit, and the oscillation circuit 32. From the power supply circuit and the oscillation circuit 32, a motor control unit 47e for energizing the stator coil 23b.
Power is supplied via. The microcomputer 100 operates the stator coils 23b according to a predetermined energization pattern for the stator coils 23b.
Can be instructed to energize. A sensor shielding plate 15a is provided below the turntable 12. The sensor shielding plate 15a enters between the positioning sensors 15 when the rotary table 12 reaches a predetermined position in the rotation direction, and the positioning sensor 15 can output the positioning signal LS of FIG.

Next, the non-contact power supply unit 14 and the non-contact signal transmission processing means 16 will be described with reference to FIGS. 3, 1 and 2. The non-contact power supply unit 14 is provided corresponding to the base 10 and the turntable 12. Non-contact power supply unit 1
Reference numeral 4 denotes a portion that supplies power from the base 10 to the rotary base 12 side in a non-contact manner to the second processing circuit 44 of the non-contact signal transmission processing means 16 and the video camera M. The non-contact signal transmission processing means 16 converts the signal data of the video camera M, which is a signal source, into optical signal data between the base 10 and the rotary base 12 through the hollow portion 20a of the shaft 20 in a non-contact manner for processing. It is the part to do.

First, the structure of the non-contact power supply unit 14 will be described. As shown in FIG. 3, the non-contact power supply unit 14 includes a magnetic field generation coil 30, a power supply circuit and an oscillation circuit 3.
2. It has a current generation coil 34 and a power supply rectification circuit 36. Power supply circuit / oscillation circuit 32 and magnetic field generation coil 30
Are arranged on the base 10 side. Current generating coil 34
The power supply rectifying circuit 36 is arranged on the rotary table 12 side. The magnetic field generating coil 30 (electromagnetic induction type coil) is a ring-shaped coil as shown in FIG.
As shown in FIG. 1, the magnetic field generating coil 30 is fixed to the outside of the shaft 20 via the coil fixing plate 7 by using fixing screws 9 corresponding to the bearings 8. The power supply circuit and the oscillation circuit 32 in FIG. 3 are required power supplies (for example, commercial single-phase AC 1
Power supply from the 00V power supply) to form an oscillating waveform, so that the magnetic field generation coil 30 generates an alternating magnetic field 30a.
Are formed.

On the other hand, an alternating current is induced in the current generating coil 34 of FIG. 3 by the alternating magnetic field 30a. The power supply rectifying circuit 36 of the rotary table 12 converts the alternating current generated by the alternating magnetic field 30a in the current generating coil 34 into a direct current. The power supply rectifier circuit 36 can supply the direct current to the second processing circuit 44 and the video camera M. As described above, the base 10 can supply power to the rotary table 12 in a non-contact manner. The current generating coil 34 is fixed so as to be fitted into the lower portion of the turntable 12. The current generating coil 34 faces the magnetic field generating coil 30 in a non-contact manner at a predetermined interval.

Next, the non-contact signal transmission processing means 16 will be described. The contactless signal transmission processing means 16 of FIG. 3 includes a first processing circuit 40, an optical transmission / reception unit 42, and a second processing circuit 4.
It has 4 mag. The first processing circuit 40 is provided in the base 10. The second processing circuit 44 is provided in the turntable 12. The optical transmitter / receiver 42 is connected to the base 10
And corresponding to the turntable 12.

The optical transmitter / receiver 42 includes a first light emitting portion 45, a second light emitting portion 46, a first light receiving portion 47, and a second light receiving portion 48.
have. The first light emitting portion 45 and the second light receiving portion 48 are arranged on the lower end side of the shaft 20 of the base 10. The first light receiving portion 47 and the second light emitting portion 46 are arranged on the upper end side of the shaft 20 of the rotary table 12. The first light emitting portion 45 is located at a position corresponding to the first light receiving portion 47, and the second light emitting portion 46 is located at a position corresponding to the second light receiving portion 48. First light emitting section 4
5 and the 2nd light emission part 46 can use a light emitting diode, for example. First light emitting section 47 and second light receiving section 48
For example, a phototransistor can be used.

The first processing circuit 40 in the base 10 is connected to the microcomputer 100, and the transmitting circuit 4
0a, a receiving circuit 40b, a data modulating circuit 40c, and a data demodulating circuit 40d. Microcomputer 1
An external device 110 is connected to 00, and the external device 1
The signal data SD from 10 is the microcomputer 1
00, a predetermined modulation is applied by the data modulation circuit 40c, and the optical signal data P is transmitted by the transmission circuit 40a.
As D, light is emitted from the first light emitting unit 45 to the first light receiving unit 47 side. Further, the receiving circuit 40b receives the optical signal data PD1 from the second light emitting section 46 received by the second light receiving section 48, and the data demodulation circuit 40d demodulates the optical signal data PD1 and the microcomputer 1
It is supposed to be sent to 00. The demodulated signal data is sent to the external device 110 side as a video signal and / or an audio signal.

Next, the second processing circuit 44 includes a transmission circuit 44.
a, a receiving circuit 44b, a data modulating circuit 44c, and a data demodulating circuit 44d. The video camera M is connected to the second light emitting unit 46 via the data modulation circuit 44c and the transmission circuit 44a. The first light receiving unit 47 is connected to the video camera M via the receiving circuit 44b and the data demodulating circuit 44d. The signal data from the video camera M is modulated by the data modulation circuit 44c and then converted into the optical signal data PD1 by the transmission circuit 44a.
As a result, the second light emitting unit 46 is caused to output the optical signal data PD.
The light is emitted in response to 1 and is sent to the second light receiving unit 48 side. In addition, the first light emitting unit 45 to the first light receiving unit 4
The optical signal data PD1 received by 7 is demodulated by the data demodulating circuit 44d via the receiving circuit 44b and sent to the video camera M as, for example, video camera control signal data.

Next, the above-mentioned motor 23 is connected to the power supply circuit in the power supply circuit and the oscillation circuit 32 via the motor control section 47e. This motor 23
The rotary table 12 is for rotating (indexing) at a predetermined angle with respect to the base table 10 for positioning. In this case, the sensor shielding plate 15a of the rotary table 12 of FIG. 1 turns the sensor output of the positioning sensor 15 from ON to OFF, and the positioning signal LS is given to the motor control unit 47e. It is supposed to stop immediately.

Next, the operation of the rotating device for signal transmission will be described with reference to FIGS. A video camera M is attached on the turntable 12. The power supply circuit and the oscillator circuit 32 are connected to a commercial power supply. First, when an image signal and an audio signal are to be obtained by the video camera M for surveillance for security, the external device 11
0 is signal data S for the microcomputer 100
Send D. The microcomputer 100 modulates the signal data SD with the data modulation circuit 40c, and the transmission circuit 4
The optical signal data PD is changed by 0a. Optical signal data P
D is sent from the first light emitting unit 45 to the first light receiving unit 47. The optical signal data PD is received by the receiving circuit 44b via the first light receiving section 47, demodulated into signal data by the data demodulating circuit 44d, and given to the video camera M. As a result, the video camera M performs an operation of shooting a predetermined image.

The video signal and audio signal obtained by the video camera M are modulated by the data modulation circuit 44c,
The optical signal data PD1 is converted by the transmission circuit 44a. The optical signal data PD1 is sent from the second light emitting unit 46 and received by the second light receiving unit 48. The optical signal data PD1 received by the second light receiving unit 48 is received by the receiving circuit 40b,
The data is demodulated by the data demodulation circuit 40d and sent to the microcomputer 100 side. And microcomputer 1
00 sends the demodulated signal data to an external device 110 such as a video conference system.

At this time, the motor control unit 47 of FIG. 3 receives power from the power supply circuit in the power supply circuit and the oscillation circuit 32 to drive the motor 23 so that the video camera M faces the predetermined direction. The stator coil 2 of this motor 23
3b is energized according to a predetermined energization pattern, so that a change in magnetic flux occurs. The change in the magnetic flux of the stator coil 23b interacts with the magnetic flux of the magnetic field generated by the rotor magnet 23a, so that the turntable 12 integrated with the rotor magnet 23a rotates (indexes) with respect to the base 10 by a predetermined angle. . The microcomputer 100 instructs the motor controller 47e to instruct the angle of the motor 23.
Based on the command signal sent to the. When the sensor blocking plate 15a blocks the light from the light emitting section of the positioning sensor 15, the positioning sensor 15 sends a positioning signal LS to the motor control section 47e, and the motor 23 stops immediately. In this way, the rotary base 12 is stopped at a predetermined position with respect to the base 10, and the video camera M is accurately oriented in a predetermined direction.

Light transmission / reception in the light transmission / reception unit 42 is performed through the hollow portion 20a of the shaft 20 in FIG. 1, so that the transmission / reception can be surely performed in a non-contact manner. The positioning sensor 15 shown in FIG. 1 uses a so-called photo coupler having a light emitting portion and a light receiving portion that receives light from the light emitting portion.
Not limited to this, a rotary encoder, a rotary potentiometer, a magnet, a magnetic sensor, or the like may be used as a means for positioning the rotary base 12 at a predetermined position with respect to the base 10. Further, by applying a lubricant such as silicon oil between the shaft 20 and the bearing 8 of FIG. 1 or by using a material having a good slidability as the material of the shaft 20, for example, a fluororesin (polytetrafluoroethylene), The load on the rotating table 12 is reduced when the rotating table 1 is rotated.
The rotation of 2 can be performed smoothly.

In the above-described embodiment, the video camera M is used for security, but the rotating device for signal transmission can be used, for example, in a so-called video conference system. So in a video conference,
In order to direct the camera to a normal seat, it is necessary to direct the video camera M to each seat A, B, C, ... At a predetermined angle (for example, θ = 30 °) as shown in FIG. In this case, for each angle corresponding to each seat A, B, C,
By setting a plurality of rotary positioning means 15b composed of a combination of the positioning sensor 15 and the sensor shielding plate 15a, the video camera M can be swiftly attached to the intended seat.
Can be turned.

As described above, according to the embodiment of the present invention, the video camera is set as the signal source on the turntable, and the turntable 12 and the video camera M are oriented in, for example, a video conference system. The video information and audio information can be surely and quickly turned to the intended seat. In addition to the video conference system, the embodiment of the present invention can be applied to, for example, a security system that monitors an intruder or the like as described above. Further, the rotary table 12 and the video camera M thereof can be smoothly and semi-permanently rotated up to a predetermined angle of 360 ° or more by an actuator such as a drive motor, and the object can be monitored or automatically tracked. In the embodiment of the present invention, unlike the conventional one, the rotation angle is not particularly limited, and the signal data is exchanged between the rotary base 12 and the base 10 via the optical transmitter / receiver 42 in a non-contact manner. Therefore, not only analog type signal data but also digital signal can be surely exchanged.

Further, in the embodiment of the present invention, so-called electric power can be supplied from the base 10 to the rotary base 12 in a non-contact manner, so that a connection is made as compared with the conventional mechanical contact type. Power can be supplied stably without any failure. Further, in the past, a flexible printed circuit board was used to send a signal, but in the embodiment of the present invention, since the flexible printed circuit board does not need to be reversed to return the twist, the rotary table is indexed. It is possible to freely rotate in the clockwise direction and the counterclockwise direction with respect to the target value for achieving the target value, and to reach the target value faster. Since the non-contact power supply unit and the non-contact signal transmission processing means do not hinder the rotation of the rotary base and the base, the rotation load is smaller than that of the conventional one, and the rotary base can rotate at high speed and position at high speed. . In other words, even if the rotary table is rotated in the desired direction as much as possible, the signal data can be transmitted and the power can be supplied in a non-contact manner, and the rotary table can smoothly rotate without changing from the initial state.

As described above, in the embodiment of the present invention, it is not necessary to attach an external motor to the rotary base and the base, and to provide a power transmission component for direct drive, and the rotary base 12 and the base. Since the motor can be set almost in the table 10, the external motor is not required, the rotating device can be made smaller and lighter, and the number of parts can be reduced, so that the cost can be reduced. Can be achieved. Moreover, since it is not necessary to adopt a direct drive structure using direct drive parts such as gears,
A reduction in load and mechanical play such as backlash can be achieved. Therefore, the characteristics of the movement control in the rotation direction of the turntable with respect to the base are improved. By the way, the present invention is not limited to the above-described embodiment of the present invention, and as described above, the shaft 20 has a cylindrical shape or a transparent shape as shown in FIG. 1, and the shaft 20a has, for example, the first light emission shown in FIG. Part 45
And the optical path of the first light receiving portion 47, and the second light emitting portion 46 and the second
It suffices that a hole is formed only in the optical path of the light receiving section 48 of the above.

In the above embodiment, the video camera is taken as an example of the signal source, but the signal source is not limited to this. For example, other precision equipment such as a television monitor may be set on the rotary base, or various sensors may be set on the rotary base. It is of course possible to set to. Therefore, in the embodiment of the present invention, the signal source is not particularly limited, and various types such as precision instruments and sensors can be adopted. Examples of precision instruments include, for example, surveying instruments, astronomical telescopes, binoculars, mobile phones, and the like.

[0033]

As described above, according to the present invention,
Since an external motor is not required, cost reduction, size reduction and weight reduction can be achieved, load and mechanical play at the time of rotating the rotary table can be reduced, and signal data regarding the signal source can be reliably transmitted.

[Brief description of the drawings]

FIG. 1 is a diagram showing a preferred embodiment of a rotating device for signal transmission of the present invention.

FIG. 2 is an exploded perspective view of the embodiment shown in FIG.

FIG. 3 is a diagram showing a base, a turntable, and other elements of the embodiment of FIG.

FIG. 4 is a diagram showing an example of positioning of a camera provided on a turntable.

[Explanation of symbols]

 8 Bearings 10 Base 12 Rotation Table 14 Non-contact Power Supply Section 15 Positioning Sensor 15a Sensor Blocking Plate 15b Rotation Positioning Means 16 Non-contact Signal Transmission Processing Means 20 Axis 20a Axis Hollow 23 Motor 23a Rotor Magnet 23b Stator Coil 30 Magnetic Field Generating coil (magnetism generating coil) 32 Power supply circuit and oscillating circuit 34 Current generating coil 36 Power supply rectifying circuit 40 First processing circuit 42 Optical transmitter / receiver section 44 Second processing circuit 45 First light emitting section 46 Second light emitting section 47 First light receiving section 48 Second light receiving section M Video camera (signal source)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Oshima 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (8)

[Claims] 1. A base, a rotary base provided with a signal source and rotatably supported with respect to the base, and signal data relating to the signal source between the base and the rotary base converted into optical signal data. A non-contact signal transmission processing means for exchanging and processing in a non-contact manner, a rotor magnet provided on the base for rotating the rotary base with respect to the base, and a stator coil provided on the rotary base. A rotating device for signal transmission, comprising: a configured motor. 2. The rotating device for signal transmission according to claim 1, further comprising a non-contact power supply unit for supplying power from the base to the rotary base in a non-contact manner. 3. A non-contact power supply unit, a magnetic field generating coil arranged on a base, and a circuit arranged on the base for generating an AC magnetic field by supplying power from a commercial power supply to the magnetic field generating coil. , A current generating coil that is arranged on the turntable and generates a current by the alternating magnetic field generated by the magnetic field generating coil of the base, and a rectifier circuit that is arranged on the turntable and rectifies the current generated by the current generating coil The rotation device for signal transmission according to claim 2, further comprising: 4. The non-contact signal transmission means comprises an optical transmitter / receiver for exchanging signal data relating to a signal source in a contactless manner. The optical transmitter / receiver comprises a first light emitting portion arranged on a base and a rotary base. A first light emitting portion for receiving the optical signal data from the first light emitting portion,
Light receiving section, a second light emitting section arranged on the turntable, and a second light receiving section arranged on the base for receiving optical signal data from the second light emitting section.
Of the light receiving part of and the signal data from the outside is processed and given to the first light emitting part,
A first processing circuit for processing the optical signal data from the second light receiving section, and processing the signal data related to the signal source to the second light emitting section to process the optical signal data from the first light receiving section. A second processing circuit, wherein the second processing circuit is provided with a current rectified by the rectifying circuit for driving.
A rotation device for signal transmission according to item 1. 5. The base has a bearing portion, the rotary base has a shaft, and the rotary base is rotatable with respect to the base by holding the shaft of the rotary base on a bearing of the base. The rotation device for signal transmission according to claim 1. 6. The rotary device for signal transmission according to claim 5, wherein the shaft of the rotary table is hollow so as to pass the optical signal data of the optical transceiver. 7. The rotating device for signal transmission according to claim 5, wherein the shaft of the turntable is a transparent member for passing the optical signal data of the optical transceiver. 8. The rotating device for signal transmission according to claim 1, further comprising a positioning sensor for giving a stop command to the motor side when the rotary base reaches a predetermined position.