JPH06339051A - Video camera with safety device - Google Patents

Abstract

PURPOSE:To prevent electric shock at the time of detaching a connecting table while a commercial power supply is inputted by detecting the connection and disconnection of an image pickup means with a camera control unit(CCV), and stopping power source supply from the CCV to the image pickup means at the time of disconnection. CONSTITUTION:A camera head 1 being the image pickup means is connected through a connecting cable 2 with a CCV 3 connected with the commercial power supply. Whether or not the head 1 is connected through a cable 2 with the CCV 3 is detected by a detecting part 7 of the CCV 3. At the time of disconnection, a high voltage power source ON/OFF circuit 11 is turned off by the detection output of an L level from a detecting part 7, and the power source supply from the CCV 3 to a unit 1 is stopped. Thus, even when the commercial power supply is inputted to the CCV 3, the electric shock can be prevented, and a video camera with a safety device can be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera having a safety device.

[0002]

2. Description of the Related Art Conventionally, a camera control unit (CCU
Part) and the camera head part are separated from each other, they are connected by a connection cable. CCU
The section is composed of a transformer circuit or the like that transforms the voltage from the commercial power supply into the voltage used in the camera head section.

The camera head section is composed of an image pickup tube or the like for converting an optical image of a subject from a photographing lens into a video signal. The CCU section and the camera head section are provided with a connection cable and a detachable connector, respectively. With such a configuration, the connection cable can be pulled out even when the commercial power source is on, and there is a risk of electric shock if the pin on the power supply side is touched. In particular, since the image pickup tube is driven by a high voltage, the supplied voltage is high, which is a big problem.

In order to prevent electric shock, in a conventional video camera, a female pin is used for a connector on a power supply side of a CCU section and a connection cable, and an male pin is used for a connector on a power supply side. That is, the number of opportunities for the user to touch the pin on the power supply side has been reduced.

[0005]

However, even in the above case, there is a case where a finger or the like touches the thin conductive material such as metal. The present invention has been made in view of such conventional problems, and does not cause electric shock even if the connection cable between the camera head section and the CCU section is disconnected while the commercial power is on. The purpose is to provide a video camera.

[0006]

In order to solve the above problems, in a video camera with a safety device according to the present invention, an image pickup means for converting an optical image into an electric video signal is provided in the first unit, and A power supply means for supplying power for operating the image pickup means in a second unit separated from the first unit; and the image pickup means and the image pickup means for supplying power to the image pickup means from the power supply means. The power supply means comprises a connection means capable of being electrically connected to the power supply means, and a connection detection means for detecting that the connection means is connected to the image pickup means and the power supply means. Power is supplied only when it is detected that the connection is made by the detection means.

[0007]

As described above, in the present invention, the power supply means is configured to supply power only when the connection means is connected to the image pickup means and the power supply means. It does not supply power.

[0008]

FIG. 1 is a diagram showing the configuration of a video camera according to an embodiment of the present invention. Actually, there are various circuits for controlling the video signal, but this time, only the power supply will be described. In FIG. 1, the video camera of the embodiment is composed of a camera head unit 1, a connection cable 2 and a CCU unit 3.

The camera head unit 1 comprises an image pickup tube 4, a drive circuit 5, and a connector 6. The image pickup tube 4 converts an optical image of a subject from a photographing lens (not shown) into an electric image signal, and requires a high voltage to drive. The drive circuit 5 is a circuit for driving the image pickup tube 4.

The connector 6 is for connecting to the connection cable portion 2, and two of the pins are used for detecting connection. Then, as shown in FIG.
The pin is shorted. The CCU unit 3 is the camera head unit 1.
For supplying a high-voltage power source to the high-voltage power source, and is composed of a high-voltage generating transformer 8, a rectifying circuit 9, a connector 10, a detecting section 7, and a high-voltage power source ON / OFF circuit 11.

The high-voltage generating transformer 8 is a transformer that amplifies the voltage from the commercial power source to a voltage that can be used by the camera head unit 1. The rectifier circuit 9 is a circuit that rectifies the output of the high-voltage generating transformer 8 and is a high voltage power source ON / OF described later.
It is connected to the connector 10 via the F circuit 11. The detection unit 7 detects whether or not the connection cable 2 is connected between the camera head unit 1 and the CCU unit 3, and is configured as shown in FIG. When connected, L
Output a signal. Details will be described later.

The high-voltage power supply ON / OFF circuit 11 is composed of a known relay circuit or the like so as to be turned on and off based on a signal from the detection section 7. The connector 10 is to be connected to the connection cable section 2, and two pins of the connector 10 are used for connection detection and are connected to the detection section 7.
The connection cable portion 2 includes a cable 14 and connectors 12 and 13 provided at both ends of the cable 14,
In addition to transmitting high voltage from U section 3 to camera head section 1,
Also used for connection detection.

The cable 14 is a cable of several tens of cores, two of which are used as connection detecting cables. The connector 12 can be connected to the connector 6 and the connector 13 can be connected to the connector 10. The connectors 12 and 13 are
2 pins each are used for connection detection, cable 14
It is connected to the connection detection cable. Further, it goes without saying that they are provided so as to be connected to the pins for detecting the connection of the connectors 6 and 10. FIG. 2 shows a specific embodiment for detecting connection. In this embodiment, the high-voltage power supply ON / OFF circuit 11 is configured to turn on when the output of the detection unit 7 is an L signal and turn off when the output is an H signal.

The operation will be described. For example, when commercial power is supplied and the connection cable 2 is connected to the CCU section 3 and the camera head section 1, the ground and the output terminal inside the detection section 7 are Since it is conducting, it outputs the L signal. The high-voltage power supply ON / OFF circuit 11 is turned on while the L signal is being input, so that the CCU unit 3 supplies power to the camera head unit.

Further, when the commercial power is supplied, the CCU
When power is supplied from the unit 3 to the camera head unit 1,
If the connection cable 2 is disconnected from either the CCU unit 3 side or the camera head unit 1 side, the ground inside the detection unit 7 and the output terminal are not conducted, and the H signal is output. At this time, the high-voltage power ON / OFF circuit 11 is OF
Therefore, the power supply to the camera head unit 1 is stopped, and even if the pin on the power supply side is touched, there is no electric shock.

FIG. 3 shows another embodiment for detecting connection. In this embodiment, the high-voltage power supply ON / OFF circuit 11 is configured to be turned on when the output of the detection unit 7 is an H signal and turned off when it is an L signal. When the connection cable 2 is connected to the CCU unit 3 and the camera head unit 1, the detection unit 7 is connected to the low voltage power supply + Vcc and outputs an H signal, and the CCU unit 3 supplies power to the camera head unit 1. Will be done.

In addition, commercial power is supplied, and the CCU
When power is supplied from the unit 3 to the camera head unit 1,
If the connection cable 2 is disconnected from either the CCU unit 3 side or the camera head unit 1 side, the detection unit 7 disconnects the low voltage power supply + Vcc and outputs an L signal, and the CCU unit 3 outputs the camera head unit 1 Is not powered. The high-voltage power supply ON / OFF circuit 11 is not limited to be installed between the rectifier circuit 5 and the connector 10 as shown in FIG. 1, but may be installed between the commercial power supply and the high-voltage generating transformer 8. However, it may be installed between the high-voltage generating transformer 8 and the rectifying circuit 5.

Further, the mechanism for detecting the connection between the camera head unit 1, the CCU unit 3 and the connection cable 2 is configured like the detecting unit 7, but, for example, a photo sensor, a push switch or the like may be used for the camera head unit 1, the CCU. It may be provided between the connector of the section 3 and the connector of the connection cable 2 to detect the connection. By having such an electric shock prevention function,
There is no risk of electric shock even if the same male pin or female pin is used for the connectors at both ends of the connection cable 2. If the same connector pins at both ends of the connection cable 2 can be used, it is not necessary to confirm which of the camera head 1 and the CCU 3 the connector is connected to, and the usability is improved.

[0019]

As described above, according to the present invention, since the power is supplied only when the connecting means connects the image pickup means and the power supply means, when the connecting means is not connected, Since the power is not supplied, the user does not have to worry about accidental electric shock.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a detection unit 7 of the embodiment.

FIG. 3 is a diagram showing another configuration of the detection unit 7 of the embodiment.

[Explanation of symbols]

 1 ... Camera head part 2 ... Connection cable 3 ... CCU part 4 ... Imaging tube 5 ... Drive circuit 6 ... Connector 7 ... Detection part 8 ... High voltage generation transformer 9 ... Rectifier circuit 10-Connector 11-High voltage power ON / OFF circuit 12,13-Connector 14-Cable

Claims (2)

[Claims] 1. An imaging means for converting an optical image into an electrical video signal in a first unit; and a second unit separate from the first unit for operating the imaging means. Power supply means for supplying power, connection means for electrically connecting the imaging means and the power supply means to supply power from the power supply means to the imaging means, and the connection means for the imaging Means and connection detection means for detecting connection to the power supply means, wherein the power supply means supplies power only when the connection is detected by the detection means. A video camera with a characteristic safety device. 2. The video camera with a safety device according to claim 1, wherein the connecting means is a cable having a plurality of cores, and several cores of the cable are assigned for connection detection.