JPS60176A - Video camera device - Google Patents

Abstract

PURPOSE:To allow the device to be adapted to any type of VTR by opening a serial data line and a serial clock/tally line at the changeover of polarity of a video recording line. CONSTITUTION:Terminal numbers 3, 4 and 6 indicate respectively the serial data line, the serial clock/tally line and the REC line. When a voltage polarity changeover switch 16 is turned on, a transistor (TR)15 is turned off, a level of a point A goes to H and then a TR14 is turned on and the terminals 3, 4 are connected to a VTR. On the other hand, when the switch 16 is turned off, the TR15 is turned off, the level of the point A goes to L and then the TRs 13, 14 are turned off, the terminals 3, 4 are disconnected from the camera main body. Since the point A is at L level in this case, the level of the terminal 6 is controlled to be H level at the PLAY mode and to L/H level depending on the turning on/off of the switch 17 at the REC mode. Thus, the camera device is adapted to any type of VTR.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a video camera device.

Structure of the conventional example and its problems As shown in FIG.
is usually composed of 1Q lines (1o bins), each of which has a different function.

That is, Nα1 is lN10UT of the video signal, Na2
．． 8.9 is ground, Nα3 is serial data, 4 is serial clock/tally, NnS is standby/(audio 2h), Nα6 is recording (RHO), Nα7
is an audio line, and Nα1o is a power line.

In this case, if the video camera body 11 and the VTR 12 form a pair, the VTR t2 can be remote-controlled from the video camera body 11 side.

Here, 6 bins are for recording (REC) control, and there are two types: low at playback (PLAY), R11 at stop, high at start, and vice versa.

Therefore, if a polarity changeover switch is provided on the side of the camera body 11, the camera can be adapted to either PLAY or H VTR by changing the switch.

However, there are some VTRs that cannot be connected with this alone. This is because the state of the 3.4-pin VTR side circuit changes depending on the individual VTR (model), and in the case of a VTR with 4-pin set to H, the camera body 11 will not record.

OBJECTS OF THE INVENTION The present invention eliminates these drawbacks and provides a video camera device that is compatible with any type of VTR.

Structure of the Invention In order to achieve the above object, the present invention provides 3.4 when switching polarity.
The bins, that is, the serial data line and the serial clock/tally line are also switched.

Description of examples Hereinafter, an embodiment will be explained with reference to FIGS. 2 to 4.

Figures 2 and 3 show the basic configuration, and Figure 2 shows the +
START FIG. 3 shows the -start state. In the figure, 11 is the inverter, a is the camera body side, b
indicates the VTR side.

FIG. 4 shows the specific configuration of this embodiment, and shows the angle between 13° and 14°.
16 is a transistor, 16 is a voltage polarity switch,
17 is an RKC start/stop switch, and 18 is a control circuit, which operates as shown in the following table.

In the above configuration, if switch 16 is on, transistor 16 is off, point A is H, therefore transistor B, 14 is on, and terminals 3 and 4 are at V.
Connected to TR.

On the other hand, when the switch 16 is turned off, the transistor 15 is turned on and the point A becomes L, so the transistor 13.1
4 is turned off, and terminals 3 and 4 of the camera body and VTR can be opened. Also, since this point is L, the No. 6 terminal can be controlled to H1RF during PLAY, ON/OFF of the switch 17 at 0 o'clock, and L/H. Therefore, it can be adapted to any VTR.

Effects of the Invention As described above with reference to embodiments, according to the present invention, when switching the polarity of terminal 6 (RKC line), terminal 3 (serial data line) and terminal 4 (serial clock/tally line) are opened. This makes it possible to expand the range of VTR compatibility, which is advantageous in practice.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing the connection state between a video camera device and a VTR, FIGS. 2 and 3 are diagrams showing the principle configuration of a video camera device in an embodiment of the present invention, and FIG. 4 is a specific configuration thereof. It is a diagram. 13.14.15 Mountain-mount transistor, 16... Mountain voltage polarity changeover switch, 17... RKC start/stop switch, 18... Control circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4-1α-dimension-b-

Claims (1)

[Claims] A switch for changing the polarity of a recording line in a cable connected to a magnetic recording/playback device, and a serial data line. A video camera device provided with switches connected in series to serial clock/tally lines and turned on and off by the above switches.