JPH0876244A - Pan head device - Google Patents

Abstract

PURPOSE: To realize free panning at 360 deg. or more by transmitting tilt control and camera control signals and output video signals from a power source and a camera by a transmission means provided on a rotary shaft for panning. CONSTITUTION: A circuit module 60 on a pedestal 10 multiplexes the control signal of a tilt mechanism and the camera 32 and the necessary power source. The rotary shaft for panning 16 is hollow and has a single core coaxial structure by arranging a core wire 50 in the rotary shaft 16. A connection conductor 54 always electrically connecting even when the rotation of the core wire 50 is arranged at the upper end of the core wire 50, and output from the circuit module 60 is transmitted to a circuit module 66 regardless of the rotation of a turntable for panning 14. The circuit module 66 drives the tilt mechanism and controls the camera 32. Then, the circuit module 66 modulates and multiplexes the output video signal from the camera 32 and the state signals of the tilt mechanism and the camera 32. Output from the circuit module 66 is transmitted through a transmission path and impressed on the circuit module 60. The circuit module 60 separates and demodulates the video signal from the camera 32 and outputs it to an output terminal 64.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera platform which supports a camera so that its direction can be changed.

[0002]

2. Description of the Related Art A conventional pan / tilt head platform device is
Generally, a tilt mechanism is placed on a pan mechanism, and a camera is fixed on the base of the tilt mechanism. A front view of the conventional example is shown in FIG. 2, and a side view thereof is shown in FIG.

At the center of the pedestal 110 is a pan bearing 112.
Is fixed, and the pan rotating table 1 is attached to the pan bearing 112.
A pan rotation shaft 116 extending downward from the lower surface of 14 is rotatably supported. An arcuate pan rack gear 118 is further fixed to the lower surface of the pan rotary table 114. The pan motor 120 is fixed on the pedestal 110, and the pan rack gear 118 includes the pan motor 12.
The pan pinion gear 122 rotated by 0 meshes. Bread motor 120, that is, a pinion for bread
When the gear 122 rotates, the pan rotary base 114 moves through the pan rack gear 118 and the pan pinion gear 1 moves.
It rotates in the horizontal direction (direction parallel to the surface of the pedestal 110) by an angle corresponding to the rotation amount of 22.

Two tilt bearings 124 and 126 are fixed on the pan rotary base 114 at a predetermined distance. A tilt shaft 128 is passed between the tilt bearings 124 and 126, and a tilt base 130 is attached to the tilt shaft 128. It is fixed.
A video camera 132 is fixed to the upper surface of the tilt base 130, and a tilt rack gear 134 is fixed to the lower surface. A tilt motor 136 is mounted on the pan rotary table 114.
Is fixed, and a tilting pinion gear 138 rotated by a tilting motor 136 meshes with the tilting rack gear 134. When the tilting motor 136, that is, the tilting pinion gear 138 rotates, the tilting base 130 moves vertically through the tilting rack gear 134 by an angle corresponding to the rotation amount of the tilting pinion gear 138 (of the base 110). Rotation in the direction perpendicular to the plane).

On the base 110, a pan motor 120 is mounted.
Also, a motor drive control circuit 140 for driving and controlling the tilt motor 136 is installed, and drive signal lines 142 and 144 are provided.
And a pan motor 120 and a tilt motor 136, respectively. Power and control signals for the motor drive control circuit 140 are externally supplied to the connection terminal 146 of the motor drive control circuit 140. Reference numeral 148 is a cable for the power supply to the video camera 132, control signals (exposure, zoom, focus, etc.), and video signals of captured images.

[0006]

In the conventional example, the drive signal line 144 connecting the motor drive control circuit 140 and the tilting motor 136 limits the rotation of the pan within a certain angle. The video camera cable 148 also physically limits the turnable angle of the pan.

For this reason, for example, when a plurality of people participate in a video conference around a circular table, conventionally, a plurality of cameras using the conventional pan head device are prepared, or
There is no choice but to allow the drive signal line 144 and the cable 148 to allow a pan of 360 ° or more or almost 360 °.

In the former case, not only a video output switcher is additionally required, but also all video cameras must be operated in synchronization in order to prevent the disturbance of the sync signal at the time of switching, which is very expensive. It becomes something. In the latter case, when trying to shoot a participant located beyond the pan limit, the pan must be panned by approximately 360 ° in the opposite direction, which is a problem with immediacy.

An object of the present invention is to provide a pan head device which eliminates such inconvenience.

Another object of the present invention is to provide a pan head device in which the pan angle is not physically limited.

A further object of the present invention is to provide a pan head device capable of panning over 360 °.

[0012]

A pan head device according to the present invention rotatably supports a pan rotation shaft of a pan rotation base on a pedestal, and a tilt base is provided on the pan rotation base. A pan head device for fixing a camera on the tilt table, wherein a drive mechanism of the tilt table, a control signal of the camera and a necessary power source, and a transmission means of an output video signal of the camera are the pan rotation axis. It is characterized by being provided in.

[0013]

With the above means, the tilt control and camera control signals, the power supply and the camera output video signal are transmitted by the transmission means provided on the pan rotation axis, so that the pan range is limited by the cable as in the conventional example. There is no such thing. That is, in principle, a pan of 360 ° or more can be realized.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a structural diagram of a main part of an embodiment of the present invention. In this embodiment, in order to rotatably support the pan rotation base on the pedestal, the pan rotation shaft has a hollow structure, and one conductive core wire (or core rod) is arranged in the pan rotation shaft to form a single core coaxial structure. With this, the power supply, the drive signal for the tilt motor, and the video camera control signal are transmitted from the circuit module on the pedestal to the circuit module on the pan rotation base, and the circuit module on the pan rotation base mounts on the pedestal. The video signal output from the video camera is transmitted to the circuit module. The structure and operation will be described in detail below. However, in order to prevent the drawing from being unduly complicated, in FIG. 1, those not essential for understanding the mechanical structure of the present embodiment, such as the pan motor, the tilt motor, and the bearing of the tilt shaft, are shown. Is omitted.

In FIG. 1, 10 is a pedestal, 12 is a pan bearing, 14 is a pan rotary base, and 16 is a pan rotary shaft. The pan rotation axis 16 is a characteristic element of this embodiment,
In FIG. 1, the internal structure is shown in a sectional view for clarity. Details of the internal structure of the pan rotation shaft will be described later. A pan rack gear having a gear at 360 ° is fixed to the lower surface of the pan rotary base 14. A pan pinion gear similar to the pan pinion gear 122 meshes with the pan rack gear.

Reference numeral 28 is a tilt shaft supported by a tilt bearing (not shown), 30 is a tilt base fixed to the tilt shaft 28, and 32 is a video camera fixed on the tilt base 30. The mechanism for rotating the tilt shaft 28 (that is, the tilt rack gear, the tilt motor, and the tilt pinion gear) is the same as the conventional example.

The internal structure of the pan rotating shaft 16 will be described in detail. The pan rotation shaft 16 is made of a hollow conductive cylinder whose upper and lower ends are open. Inside the pan rotary shaft 16, a core wire (or core rod) 50 that forms a single-core coaxial structure with the pan rotary shaft 16 is erected from the pan bearing 12. Core wire 50
As shown in detail in FIGS. 4 and 5, a ring 52 that rotates according to the rotation of the pan rotating table 14 is provided at the upper end of the core wire 5.
0, the connection conductor 54 that is electrically connected to the core wire 50 is always embedded in the ring 52 regardless of the rotation of the ring 52. A cap 56 is attached on the ring 52 to prevent the ring 52 from falling off. FIG. 4 is a perspective view of the core wire 50 with the ring 52 and the cap 56 removed, and FIG. 5 shows the core wire 50 with the ring 52 and the cap 56.
The perspective view of the assembled state is shown. On the other hand, a connecting conductor 58 extending in the lateral direction is fixed to the lower end of the core wire 50, as shown in FIG.

The multiplexing / demultiplexing circuit module 60 mounted on the pedestal 10 is electrically connected to the connecting conductor 58 via the connecting wire 62 and has a connecting terminal 64 for external connection. On the other hand, the multiplexing / demultiplexing circuit module 66 mounted on the pan rotating table 14 is electrically connected to the connecting conductor 54 via the connecting line 68 and to the video camera 32 via the connecting cable 70. To do.

FIG. 6 shows a multiplexer / demultiplexing circuit module 60, 6 connected to each other via a core wire 50 in the pan rotating shaft 16.
6 shows an overall circuit diagram of No. 6. Reference numeral 72 denotes a transmission line including the connection line 68, the connection conductor 54, the core wire 50, the connection conductor 58, and the connection line 62. 74 is a pan motor, 76 is a tilt motor, and 78 is (the connection cable 7 of the video camera 32).
0) for connecting the circuit module 66,
It consists of four terminals for the luminance component, the chromaticity component, the control signal / state signal, and the power source of the video signal.

FIG. 7 shows the internal structure of the circuit module 66. In FIG. 7, reference numeral 212 is an FM modulation circuit for FM-modulating the luminance signal from the video camera 32, and 214 is an F modulation circuit.
A band pass filter (BPF) for removing unnecessary frequency components from the output of the M modulation circuit 212, a frequency conversion circuit 216 for frequency converting the chromaticity signal from the video camera 32 into a low frequency, and a frequency conversion circuit 216 for frequency conversion circuit 216. Is a BPF that removes unnecessary frequency band components from the output of.

Reference numeral 220 denotes a demultiplexing circuit module 60.
The video motor connected to the connection terminal 78 according to the tilt control signal from the tilt motor 76 and the camera control signal (focus, exposure, zoom, white balance, etc.) from the demultiplexing circuit module 60.
A control signal of a signal format suitable for the camera 32 is connected to the connection terminal 78.
And a status signal of the video camera 32 and a status signal of the tilting motor 76 are multiplexed to be sent to the demultiplexing circuit 60 (MCU).

Reference numeral 224 denotes an FSK modulation circuit for performing FSK (frequency shift keying) modulation on a digital signal (status signal) serially output from the MCU 220. Reference numeral 226 denotes B for removing unnecessary frequency components from the FSK modulation circuit 224.
It is PF.

228 is a BPF 214, 218, 226
Is an adder for frequency-multiplexing the output of the above, and its output is connected to (the connecting line 68 of) the transmission line 72 via the buffer amplifier 230, the matching resistor 232 and the capacitor 234 for cutting the direct current.

The connection point between the resistor 232 and the capacitor 234 is applied to the BPF 238 via the buffer amplifier 236. The BPF 238 extracts a predetermined frequency component of FSK modulation. Reference numeral 240 denotes an FSK demodulation circuit that performs FSK demodulation on the output of the BPF 238, the output of which is the MCU 220.
Is applied to

Reference numeral 242 denotes a low-pass capacitor for extracting the DC voltage supplied from the circuit module 60 via the transmission line 72.
A filter (LPF) 244 is a DC- which generates a power supply voltage required for each circuit in the circuit module 66 and the video camera 32 from the DC voltage output from the LPF 242.
It is a DC converter.

A schematic structure of the circuit module 60 is shown in FIG. In FIG. 8, 250 is a buffer amplifier for a signal transmitted from the circuit module 66 via the transmission path 72, and 252 is an FM from the output of the buffer amplifier 250.
BPF for extracting modulated luminance signal, 254 is BPF 252
The FM demodulation circuit for FM demodulating the output of BPF, BPF for extracting the low frequency chromaticity signal from the output of the buffer amplifier 250, 258 for the frequency conversion circuit for frequency converting the output of the BPF 252 to the original frequency band, 260 , BPF for extracting the FSK modulated signal from the output of the buffer amplifier 250, and 262 for an FSK demodulation circuit for FSK demodulating the output of the BPF 260. The output of the FM demodulation circuit 254 is
The luminance output terminal of the connection terminal 64 is applied, and the output of the frequency conversion circuit 258 is applied to the chromaticity output terminal of the connection terminal 64.

The reference numeral 264 supplies a signal (tilt and camera status signal) corresponding to the output signal of the FSK demodulation circuit 262 to the control terminal of the connection terminal 64, and also the connection terminal 6
According to the control signal from 4, drives the pan motor 74,
Further, it is a microcomputer (MCU) that processes (for example, multiplexes) the control signals of the camera 32 and the tilt motor 76 for transmission to the circuit module 66.

Reference numeral 268 denotes a camera 3 from the MCU 264.
2 and a FSK modulation circuit 270 that FSK-modulates the control signals of the tilt motor 76 is a BPF that removes unnecessary frequency components from the output of the FSK modulation circuit 268. BPF
The output of 270 is connected to the transmission line 72 via the buffer amplifier 272 and the matching resistor 274.

Reference numeral 276 denotes a circuit module 6 from the AC power source.
0 is a power supply circuit for generating a power supply voltage for each unit and a power supply voltage to be supplied to the circuit module 66, and the power supply voltage to be supplied to the circuit module 66 is the inductance 2
It is connected to the transmission line 72 via 78.

The operation of the circuits shown in FIGS. 6, 7 and 8 will be described. When connected to an AC power source, the power circuit 276
A power supply voltage is supplied to each part of the circuit module 60, and a DC voltage of a predetermined voltage is also supplied to the circuit module 66 via the inductance 278 and the transmission path 72.

A pan / tilt control signal and a camera control signal (focus, zoom, exposure and white balance control signals) are applied to the control terminal of the external connection terminal 64 from an external circuit. The MCU 264 has an external connection terminal 64
According to the pan control signal of the control signal from the control terminal of
The pan motor 74 is driven, and the tilt control signal and the camera control signal are serially output to the FSK modulation circuit 268 after predetermined processing (format conversion, etc.) for transmission. The FSK modulation circuit 268 sends the control signal from the MCU 264 to FS at 100 kHz / 110 kHz, for example.
K-modulate. The BPF 270 removes unnecessary frequency components from the output of the FSK modulation circuit 268, and the output is buffered.
It is supplied to the circuit module 66 via the amplifier 272, the resistor 274, and the transmission path 72.

In this way, the circuit module 66 is supplied with power and control signals for tilt control and camera control via the transmission line 72.

In the circuit module 66, the LPF 242 extracts the DC voltage from the electric signal from the transmission path 72, and D
The C-DC converter 244 outputs from the output of the LPF 242,
It generates the power supply voltage for each part of the circuit module 66 and the video camera 32. The power supply voltage for the video camera 32 is supplied to the video camera 32 via the connection terminal 78 and the connection cable 70.

The signal transmitted through the transmission line 72 has its DC component cut by the capacitor 234, and is applied to the BPF 238 via the buffer amplifier 236. BPF23
8 has the same pass band as the BPF 270, extracts the modulation data by the FSK modulation circuit 268, and applies it to the FSK demodulation circuit 240. The FSK demodulation circuit 240 uses the BPF2
The output of 38 is FSK demodulated and the demodulation result is supplied to the MCU 220. The FSK demodulation circuit 240 is, for example, a pulse count type FSK demodulator. MCU220 is FSK
Of the control signals serially input from the demodulation circuit 240,
The tilting motor 76 is driven in accordance with the tilt control signal, and regarding the camera control signal, the video camera 32 to be connected is connected.
It is converted into a control signal suitable for the physical and logical control method of and is output to the control terminal of the connection terminal 78.

The video camera 32 is thus
It receives the necessary power supply from the circuit module 66 and externally controlled conditions (ie zoom, focus, exposure,
Under the shutter speed and white balance), the subject is photographed and the video signal is output. The output video signal of the camera 32 is input to the connection terminal 78 of the circuit module 66 via the connection cable 70.

The luminance signal of the video signal from the camera 32 is
The BPF 214 is FM-modulated by the FM modulation circuit 212.
Then, the unnecessary frequency component is removed and applied to the adder 228. On the other hand, the chromaticity signal of the video signal from the camera 32 is frequency-converted by the frequency conversion circuit 216 to a low frequency centered at 1.5 MHz, for example, and unnecessary frequency components are removed by the BPF 218 and applied to the adder 228.

The camera 32 can also output various status signals (a signal indicating the end of external control, a reply to an inquiry, etc.) to the outside, and this status signal is output to the connection cable 70 and the connection terminal 78 of the circuit module 66. Via the MCU 220. The MCU 220 is also supplied with a status signal regarding the tilt operation. The MCU 220 converts these status signals into a predetermined format for transmission and serially outputs them to the FSK modulation circuit 224. The FSK modulation circuit 224
The signal from the MCU 220 is, for example, 300 kHz / 31
FSK modulation is performed at 0 kHz. The output of the FSK modulation circuit 224 has an unnecessary band removed by the BPF 226 and the adder 2
28 is applied.

The adder 228 includes BPFs 214, 218,
The output of 226 is added, that is, frequency-multiplexed, and the output is applied to the transmission line 72 via the buffer amplifier 230, the matching resistor 232 and the capacitor 234, transmitted through the transmission line 72 and supplied to the circuit module 60. .

FIG. 9 shows the frequency allocation of each signal transmitted through the transmission path 72.

The multiplexed signal transmitted from the circuit module 66 to the circuit module 60 via the transmission line 72 is transmitted to the BPFs 252, 256 and 2 via the buffer amplifier 250.
Applied to 60. The BPF 252 outputs F from the multiplexed signal.
The M-modulated luminance signal is extracted, the BPF 256 extracts the low-frequency converted chromaticity signal, and the BPF 260 extracts the FSK-modulated data. The FM demodulation circuit 254 FM demodulates the output of the BPF 252, and the output (luminance component) is output to the outside via the luminance terminal of the external connection terminal 64. The frequency conversion circuit 258 raises the output of the BPF 256 to the original frequency band, and the output (chromaticity component) is output to the external connection terminal 64.
It is output to the outside through the chromaticity terminal of. The FSK demodulation circuit 262 FSK demodulates the output of the BPF 260 and applies the demodulation result to the MCU 264. In this way, the MCU2
The information of the state of the camera 32 and the information of the result of the tilt control are supplied to 64, and these information and the information of the result of the pan control are formed into a predetermined format and the external connection terminal 6
Output to the outside through the control terminal of No. 4.

The frequency conversion circuit 216 and the frequency conversion circuit 258 may have the same circuit configurations as the processing circuit at the time of recording the chromaticity signal and the processing circuit at the time of reproduction in the VHS type video recording / reproducing apparatus.

The grounds of the circuit modules 60 and 66 will be briefly described. Circuit module 60 on pedestal 10
Is connected to a pan rotating bearing 12 made of a metal having a cylindrical shape. The pan rotary bearing 12 and the core wire 50 form a part of a single-core coaxial transmission line. The pan rotary shaft 16 is also made of a cylindrical metal, and the pan rotary shaft 16 and the core wire 50 form the rest of the single-core coaxial transmission line. Pan rotary shaft 16 and pan rotary bearing 1
2 has a structure of slidingly contacting each other while maintaining electrical contact with each other. Therefore, if the ground of the circuit module 66 on the pan rotation base 14 is connected to the pan rotation shaft 16,
The ground can be shared between the circuit modules 60 and 66.

As is well known, the transmission impedance of the single-core coaxial transmission line is as shown in FIG. 10, and can be easily calculated. Set the matching resistances 232 and 274 to 75
Ω, and the non-dielectric constant of the medium between the core wire and the outer conductor is 1
(I.e., air), b / a = 3.49, so that the core wire 50 and the pan rotation shaft 16 satisfy this relationship.
Also, the inner diameter of the pan rotary bearing 12 may be determined.

Needless to say, if the video camera 32 is of a type that outputs a composite video signal, the frequency conversion circuits 216 and 258 and the BPF 21 are required.
8,256 is unnecessary. The frequency allocation of the signal transmitted through the transmission line 72 in this case is as shown in FIG.

In this embodiment, the connecting conductor 54 rotatable by the ring 52 is arranged at the upper end of the core wire 50 and the connecting conductor 58 is fixed at the lower end thereof. The connection conductor may be rotatably electrically connected by a mechanism.

In the above embodiment, the power supply voltage and the predetermined signal are taken out from the core wire 50 in the lateral direction, but the same effect can be obtained by taking them out in the axial direction as shown in FIG. FIG. 12 shows a cross-sectional view of the transmission line portion of the second embodiment in which another structure is adopted as the transmission line 72.

In FIG. 12, 310 is a pedestal, 312 is a conductive pan bearing, 314 is a pan rotary table, 316.
Is a conductive and hollow pan rotary shaft, 318 is a pan rack gear having gears all around, 320 is a pan rotary shaft 31
6 is a core wire (or core rod) arranged in 6. Core wire 320
Coaxial connectors 322 and 324 are arranged at both ends of the. Core wires 322a, 3 of the coaxial connectors 322, 324
24a is always electrically connected to the core wire 320. However,
As shown in FIG. 13, the tip of the core wire 322a is on a hemisphere,
The end surface of the core wire 320 facing the core wire 322a is a hemispherical recess that can receive the hemispherical portion. On the other hand, the core wire 324 a is connected to the core wire 320 with a tenon. The outer conductor 322b of the coaxial connector 322 is the pan rotary bearing 31.
2 is always electrically connected, and the outer conductor 324b of the coaxial connector 324 is always electrically connected to the pan rotation shaft 316. Insulators 326, 328, and 330 fix the core wires 320, 322a, and 324a to the illustrated positions, respectively.

With the above structure, the pan rotating shaft 316, the core wire 320 and the coaxial connector 324 rotate as the pan rotary base 314 rotates, but the core wire 322a becomes the core wire 320 while the coaxial connector 322 remains stationary. Keep electrical connection. Further, the pan rotary shaft 316 is always electrically connected to the pan rotary bearing 312 while rotating.
As a result, the transmission path between the coaxial connector 322 and the coaxial connector 324 can always be maintained regardless of the rotation of the pan rotary table 314.

Another embodiment of the transmission path between the circuit modules 60 and 66 will be described with reference to FIG. In the embodiment shown in FIG. 14, a signal is transmitted between the circuit modules 60 and 66 by microwaves or light, and power is supplied from the circuit module 60 to the circuit module 66 by pressing a slider against a cylindrical conductor. To adopt. Specifically, in FIG. 14, reference numeral 410 is a pedestal, 412 is a hollow pan bearing, 414 is a pan rotary base, 416 is a hollow pan rotary shaft, and 418 is a pan rack gear having gears all around. Is. Reference numerals 420 and 422 denote light emitting / receiving elements (or microwave oscillating elements), which can mutually transmit signals by light or microwave through the hollow portions of the pan rotation bearing 412 and the pan rotation shaft 416. By the light emitting / receiving elements 420 and 422,
Control signals and status signals are mutually transmitted between the circuit modules 60 and 66.

The reference numeral 424 is fixed to the pan rotary table 414, and as shown in FIG. 15, two concentric cylindrical conductors 4 are provided.
The cylindrical body 426 including 24a and 424b is in pressure contact with the conductor 424a (or 424b), and the circuit module 6
It is a slider that constantly supplies a power supply voltage from 0. Power supply from the circuit module 60 to the circuit module 66,
Conductors 424a and 424b are used for the ground connection between both circuit modules 60 and 66.

In the transmission line according to this embodiment, it is necessary to add an optical modulator / demodulator (or microwave modulator / demodulator) to the circuit modules 60 and 66. Needless to say, the LPF 242 and the inductance are It becomes unnecessary.

When optical space transmission is used, the pan rotation axis 4
16 and the pan rotary bearing 412 need only be in mechanical sliding contact with each other, and no electrical connection is required. When using microwave transmission, electrical contact between the pan rotary shaft 416 and the pan rotary bearing 412 is essential, and the inner surfaces of the two must be mirror-finished to prevent microwave attenuation.

Video camera 32, circuit module 66
And when the power consumption of the tilt motor 76 is small,
The power required by these can be supplied by light.

[0055]

As can be easily understood from the above description, according to the present invention, the signal transmission between the pan rotating base and the pedestal is provided in the pan rotating shaft. There are no restrictions, and you can freely pan the camera.

[Brief description of drawings]

FIG. 1 is a side view of one embodiment of the present invention.

FIG. 2 is a front view of a conventional example.

FIG. 3 is a side view of a conventional example.

FIG. 4 is an exploded perspective view of a core wire 50, a ring 52, and a cap 56 of this embodiment.

FIG. 5 is a perspective view of a core wire 50, a ring 52, and a cap 56 in use according to the present embodiment.

FIG. 6 is an overall circuit diagram of this embodiment.

FIG. 7 is a schematic block diagram of a circuit module 66.

8 is a schematic block diagram of a circuit module 60. FIG.

9 is a frequency allocation of a signal on the transmission path 72. FIG.

10 is a characteristic impedance explanatory view of a single-core coaxial structure including a core wire 50 and a pan rotary shaft 16 or a pan rotary bearing 12. FIG.

FIG. 11 is a frequency allocation of a signal on a transmission line 72 in the case of a composite video signal.

FIG. 12 is a cross-sectional view of another structural example of the transmission line 72.

FIG. 13 is an enlarged view of a connecting portion of core wires 320 and 322a.

FIG. 14 is a cross-sectional view of yet another structure of the transmission line 72.

FIG. 15 is a structural diagram of a cylindrical body 424 for supplying power.

[Explanation of symbols]

10: Pedestal 12: Pan Bearing 14: Pan Rotating Platform 16: Pan Rotating Axis 28: Tilt Axis 30: Tilt Platform 32: Video Camera 50: Core Wire (or Core Bar) 52: Ring 54: Connection Conductor 56: Cap 58: Connection conductor 60: Multiplexing / separating circuit module 62: Connection line 64: Connection terminal for external connection 66: Multiplexing / separating circuit module 68: Connection line 70: Connection cable 72: Transmission line 74: Pan motor 76: Tilt Motor 78: Video / camera connection terminal 110: Pedestal 112: Pan bearing 114: Pan rotary base 116: Pan rotary shaft 118: Pan rack gear 120: Pan motor 122: Pan pinion gear 124, 126 : Tilt bearing 128: Tilt shaft 130: Tilt base 132: Video camera 134: Tilt rack YA 136: Tilt motor 138: Tilt pinion gear 140: Motor drive control circuit 142, 144: Drive signal line 146: Connection terminal 148: Video camera cable 212: FM modulation circuit 214: Bandpass filter (BPF) ) 216: frequency conversion circuit 218: BPF 220: microcomputer (MCU) 224: FSK modulation circuit 226: BPF 228: adder 230: buffer amplifier 232: matching resistor 234: capacitor 236: buffer amplifier 238: BPF 240: FSK demodulation circuit 242: Low-pass filter (LPF) 244: DC-DC converter 250: Buffer amplifier 252: BPF 254: FM demodulation circuit 256: BPF 258: Frequency conversion circuit 260: BPF 262: FSK Demodulation circuit 264: Microcomputer (MCU) 268: FSK modulation circuit 270: BPF 272: Buffer amplifier 274: Matching resistor 276: Power supply circuit 278: Inductance 310: Pedestal 312: Pan bearing 314: Pan rotary base 316: Pan Rotating shaft 318: Bread rack gear 320: Core wire (or core rod) 322, 324: Coaxial connector 322a, 324a: Coaxial connector 322, 324 core wire 322b, 324b: Coaxial connector 322, 324 outer conductor 326, 328, 330: Insulator 410: Pedestal 412: Pan bearing 414: Pan rotary base 416: Pan rotary shaft 418: Pan rack gear 420, 422: Light emitting / receiving element (or microwave oscillating element) 424: Cylindrical body 424a , 424b: concentric cylindrical guide Electric body 426: Slider

Claims (6)

[Claims] 1. A pan head device in which a pan rotation shaft of a pan rotation base is rotatably supported by a pan rotation bearing fixed to a base, a tilt base is provided on the pan rotation base, and a camera is fixed on the tilt base. A pan head device characterized in that a drive mechanism for the tilt base, a control signal for the camera, a necessary power supply, and a transmission means for transmitting an output video signal of the camera are provided on the pan rotation axis. 2. The pan rotary shaft and the pan rotary bearing are hollow, and the transmission means uses a core wire inserted through the hollow part of the pan rotary shaft and the pan rotary bearing as a central conductor, and the pan rotary shaft and The pan head device according to claim 1, wherein the pan rotary bearing has a single-core coaxial structure having an outer conductor. 3. The pan / tilt head device according to claim 2, wherein the transmission means further comprises an electrical connection means that is in sliding contact with the core wire to electrically connect the core wire. 4. A circuit module for modulating / demodulating and multiplexing various signals transmitted by the transmitting means is arranged on the pedestal and the pan rotary table.
The pan head device according to the item. 5. The pan head according to claim 1, wherein the drive mechanism for the tilt table and the power source for the camera are transmitted from the pedestal side to the pan rotary table side via the transmission means. apparatus. 6. A signal for transmitting the control signal of the drive mechanism of the tilt base and the camera from the pedestal side to the pan rotation base side, and the output video signal of the camera from the pan rotation base side to the pedestal side, by the transmission means. The pan / tilt head device according to claim 1, comprising a transmission means and a power transmission means for supplying power required for the tilt base drive mechanism and the camera from the pedestal side to the pan rotation base side.