JP2987872B2 - TV camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a camera unit in which one of an adapter unit and a VTR unit is selectively detachably provided, and a camera control unit is connected when the adapter unit is attached. The present invention relates to a technology for adjusting a level of an audio signal transmitted from a camera control unit, with respect to a television camera having a system.

[Summary of the Invention] The present invention is characterized in that one of an adapter unit and a VTR unit is selectively detachably provided at a rear portion of a camera unit, and the VT is attached to the camera unit.
A first sound volume adjusting means which can adjust a recording audio signal level of the VTR unit when the R unit is attached is provided, and a second audio signal level of an operator sent from the camera control unit side can be adjusted in the adapter unit. In a television camera provided with a volume control unit, the television camera is mounted on a shoulder by enabling the first volume control unit to adjust the voice signal level of the operator when the adapter unit is mounted on the camera unit. The volume of the voice of the operator can be easily adjusted even in the shooting state.

2. Description of the Related Art There is a television camera in which one of an adapter unit and a VTR unit is selectively detachably provided in a camera unit. This TV camera shoots alone when the VTR unit is attached,
When the adapter unit is mounted, an external VTR and a camera control unit are connected to the adapter unit via cables, and operators are assigned to the external VTR and the camera control unit.

FIG. 5 shows a photographing state when the VTR unit 3 is mounted. In FIG. 5, a VTR unit 3 is mounted at the rear of the camera unit 1. A viewfinder 4 is attached to the front of the camera unit 1, and a first volume knob 5 is provided on the front of the viewfinder 4. By turning the first volume knob 5, the level of the audio signal recorded in the VTR unit 3 can be adjusted.

FIG. 6 shows a photographing state when the adapter unit 2 is attached. In FIG. 6, an adapter unit 2 is attached to the rear of the camera unit 1. A camera control unit B and an external VTR C are connected to the adapter unit 2 via cables C ₁ and C ₂ , respectively. A headset 8 is connected to the adapter unit 2, and a headset (not shown) is also connected to the camera control unit B so that a cameraman and an operator can communicate with each other. A second volume knob 9 is provided on the upper side of the adapter 2. By turning the second volume knob 9, the level of the audio signal sent from the camera control unit B is adjusted. External VTR C
Is provided with a first volume knob (not shown), and the operator can adjust the level of the recording audio signal by rotating the knob.

When photographing with the adapter unit mounted, the photographer wears the headset 8 and photographs while communicating with the camera control unit B side. The volume from the operator of the camera control unit B is adjusted by rotating the second volume knob 9.

[Problem to be Solved by the Invention] In the shooting with the adapter unit mounted, the cameraman is located behind the television camera A in shooting using a tripod, and the second volume knob 9 is located in front of the cameraman. The adjustment by the rotation can be easily performed. However, when photographing on a shoulder, the second volume knob 9 is positioned almost obliquely above and behind the head of the cameraman, so that there is a disadvantage that the adjustment by turning the knob cannot be easily performed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a television camera capable of easily adjusting the volume of an operator even in a shooting state on a shoulder.

[Means for Solving the Problems] A television camera according to the present invention for solving the above problems,
One of an adapter unit and a VTR unit is selectively detachably provided at the rear of the camera unit, and the camera unit has a first sound volume adjusting unit capable of adjusting a level of a recording audio signal of the VTR unit when the VTR unit is mounted. A sound generator that converts an audio signal sent from the camera control unit into audio is connected to the adapter unit, and the audio signal sent from the camera control unit is connected to the adapter unit. In a television camera provided with a second volume adjusting means capable of adjusting a level, the level of the audio signal sent from the camera control unit side even with the first volume adjusting means when the adapter is mounted on the camera unit. Is adjusted.

[Operation] When taking a picture using a tripod with the adapter mounted, the level of the audio signal sent from the camera control unit is adjusted by operating the second volume control means located in front of the cameraman. When the camera is mounted on the shoulder with the adapter mounted to take a picture, the level of the audio signal is adjusted by operating the first sound volume adjusting means located diagonally forward and above the cameraman.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show one embodiment of the present invention.

FIG. 1 shows a camera system in the case of using a television camera A in which an adapter unit 2 is attached to a camera unit 1. In FIG. 1, a camera unit 1 of a television camera A has a built-in image pickup device and a recording microphone (not shown) protrudingly provided so that a video signal and an audio signal can be taken. A viewfinder 4 is provided on the upper surface of the camera unit 1.
A first sound volume knob 5 serving as a first sound volume adjusting means is provided on the front side of. The first volume knob 5 can adjust the level of an audio signal recorded in the VTR unit when the VTR unit is mounted, and also controls the audio signal sent from the camera control unit B when the adapter unit 2 is mounted as described below. The level can be adjusted. Camera unit 1
Is provided with a shoulder pad 6 and a tripod support means (not shown). Furthermore, the camera unit 1
A slide mounting portion (not shown) is provided on the rear surface of the device, and one of the adapter portion 2 and the VTR portion is selectively removably provided by sliding in the direction of the arrow in FIG. In this embodiment, an adapter unit 2 is mounted.

A camera control unit B and an external VTR C are connected to the adapter unit 2 via cables c ₁ and c ₂ , respectively. A video signal and the like are guided from the camera unit 1 to the camera control unit B via the adapter unit 2 and a control signal can be output to the camera unit 1 via the adapter unit 2. Camera control unit B
Is connected to the headset 7, and audio signals are transmitted so that the operator can communicate with the cameraman of the television camera A. A video signal and an audio signal are guided from the camera unit 1 to the external VTR C via the adapter unit 2, and the recording levels of these signals are adjusted by the operator. Also, a headset 8 is connected to the adapter unit 2, and the cameraman can communicate with the operator of the camera control unit B by the headset 8 as described above. Headsets 7 and 8 are provided with headphones 7a and 8a, which are sound generators, and microphones 7b and 8b.

Further, a second volume knob 9 serving as a second volume adjusting means is protruded from the rear surface of the adapter section 2. The second volume knob 9 functions as a dedicated volume adjusting means for the headset 8 when the VTR unit is mounted, and also selectively functions as a volume adjusting unit as described below even when the adapter unit 2 is mounted.

FIG. 2 shows a circuit diagram for adjusting the volume of the headset 8 of the television camera A. In FIG. 2, when the first volume knob 5 and the second volume knob 9 are rotated, each variable resistor VR ₁ ,
The mover position of VR ₂ is displaced, and the voltage value appearing on the mover fluctuates. The voltage of each mover is set by the switch SW
Are connected to the terminals a and b, respectively, and one of the voltages is selected by the changeover switch SW. This changeover switch SW
Are provided in the adapter section 2 so that they can be manually switched. The output of the changeover switch SW is guided to the level adjustment circuit 10 as a control signal. An audio signal sent from the camera control unit B is guided to the level adjustment circuit 10, and the level of the audio signal is varied based on the control signal. The audio signal output from the level adjustment circuit 10 is guided to the headset 8.

 Hereinafter, the operation of the above configuration will be described.

As shown in FIG. 1, when photographing using a tripod with the adapter unit 2 mounted, the switch SW is positioned at the terminal b.
Photographer wears headset 8 and wears TV camera A
And shoots while communicating with the operator of the camera control unit B. When communicating with the operator, when the volume of the headphones 8a of the headset 8 is large or small, the volume from the operator is adjusted by turning the second volume knob 9 of the adapter unit 2. Since the second volume knob 9 is located in front of the cameraman, the operation can be easily performed.

In addition, when photographing with the adapter unit 2 mounted on the shoulder as shown in FIG. 1, the switch SW is positioned at the terminal a. And, when communicating with the operator as above,
When the volume of the headphone 8a of the headset 8 is large or small, turning the first volume knob 5 of the camera unit 1 adjusts the volume from the operator. 1st volume knob 5
Can be operated without much difficulty because it is located diagonally forward of the cameraman.

FIG. 3 shows another example of the volume control circuit of the headset 8. 3 Figure 2 circuit differs from the Figure is a point obtained by the switched in conjunction with the changeover switch SW to another changeover switch SW _1. That is, other changeover switches SW
Reference numeral ₁ designates whether the microphone 8b of the headset 8 is on / off or remote. The on / off is selected at the terminal c and the remote is selected at the terminal d. When ON / OFF is selected, the microphone 8b can be turned on / off by a switch (not shown) of the adapter unit 2, and when remote is selected, the switch of the camera unit 1 (not shown) can be used. The microphone 8b can be turned on and off. The output of the other switches SW ₁ is derived as a switching control signal to the change-over switch SW through a two level conversion circuits 11 and 12. The changeover switch SW is terminal b position when the other switches SW ₁ is located at the c terminal position, the changeover switch SW is controlled to be located a terminal position when located at the d terminal position. In FIG. 3, reference numeral 13 denotes a level conversion and control direction conversion circuit.

The on-off of the microphone 8b Het set 8 in the case of shooting with a tripod is performed using the switch adapter unit 2 (not shown), the other switches SW ₁ is located in the c terminal position. Then, the changeover switch SW is positioned at the terminal b, so that the volume of the headset 8 can be adjusted by the second volume knob 9 of the adapter unit 2. Since when photographing put the shoulder on and off the microphone 8b headset 8 is performed using the camera unit 1 switches (not shown), the other switches SW ₁ is located in the d terminal position. Then, since the changeover switch SW is located at the terminal a position, the volume of the headset 8 can be adjusted by the first volume knob 5 of the camera unit 1.

FIG. 4 shows still another example of the volume control circuit of the headset 8. The In Figure 4, in conjunction with the first volume control 5 to mover displacement of the variable resistor VR _1, the voltage is directed to the armature is input to the adder circuit 14 via a level converter and a control direction conversion circuit 13 ing. The mover of the variable resistor VR ₂ is displaced in conjunction with the second volume knob 9,
The voltage guided to the mover is also input to the adding circuit 14. The addition circuit 14 adds both input signals and outputs this output to the level adjustment circuit 10 as a control signal.

In this circuit, the volume of the headset 8 is varied by operating either the first volume knob 5 or the second volume knob 9. Therefore, in shooting using a tripod, the adapter unit 2 is used.
The camera unit 1 is used for shooting with the second volume knob 9 on the shoulder.
The volume can be adjusted by rotating the first volume knob 5.

[Effects of the Invention] As described above, according to the present invention, one of the adapter unit and the VTR unit is selectively detachably provided at the rear of the camera unit,
The camera unit is provided with a first sound volume adjusting means capable of adjusting a recording audio signal level of the VTR unit when the VTR unit is mounted, and the adapter unit is provided with an audio signal of an operator sent from the camera control unit. In the television camera provided with the second volume adjusting means capable of adjusting the level, in a state where the adapter section is attached to the camera section, the first sound volume adjusting section can adjust the voice signal level of the operator. This provides an effect that the volume of the voice of the operator can be easily adjusted not only at the time of photographing using the tripod in the state of wearing the unit but also at the time of photographing placed on the shoulder.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a schematic diagram of a camera system using a television camera with an adapter unit, FIG. 2 is a circuit diagram of a headset volume control circuit, FIG. 3 is a headset volume control circuit diagram showing another example, FIG. 4 is a headset volume control circuit diagram showing still another example, and FIGS. 5 and 6 show a conventional example.
FIG. 5 is a schematic diagram of a television camera equipped with a VTR unit, and FIG. 6 is a schematic diagram of a camera system configured using a television camera equipped with an adapter unit. 1 Camera section, 2 Adapter section, 3 VTR section, 5
... First volume knob (first volume adjustment means), 7a, 8a
Headphones (sound generator), 9 ... second volume knob (second
Volume control means), A: TV camera, B: Camera control unit.

Claims (1)

(57) [Claims] An adapter unit and a VTR unit are selectively detachably provided at a rear portion of a camera unit.
A first sound volume adjusting means for adjusting a level of a recording audio signal of the VTR unit when the R unit is mounted is provided, and a sound generator for converting an audio signal sent from a camera control unit into audio is provided in the adapter unit. A television camera provided with a second volume adjusting means capable of adjusting the level of the audio signal sent from the camera control unit side to the adapter section, wherein the adapter section is mounted on the camera section. A television camera characterized in that the first sound volume adjusting means can also adjust the level of the audio signal sent from the camera control unit.