JPS609943Y2 - remote control operation circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control operation circuit for a video tape recorder that serves both as a playback operation means and a frame advance operation means.

It is preferable to operate the video tape recorder during playback while watching the television screen, and it is extremely effective to employ a remote controller for special playback in the video tape recorder.

However, a remote controller that is provided with a plurality of operation buttons corresponding to each special playback function is required to have an increased number of operation buttons as the number of operation functions increases, which inevitably increases costs.

Therefore, in view of the above-mentioned points, the present invention proposes a remote control operation circuit characterized by reducing the number of operation buttons and associated mechanisms by using both the playback button and the frame advance button. It is.

The present invention will be described below with reference to an illustrative embodiment.

FIG. 1 is a circuit diagram showing one embodiment of the present invention, in which the figure number 1 surrounded by dotted lines shows a remote control device, and 2 shows a capstan drive circuit of a video tape recorder. No. S□ is a play switch that is closed when the play/frame forward button is pressed, S2 is a stop switch that is closed when the stop button is pressed, S3 is a still switch that is closed when the still image playback button is pressed, and S4 is 3
Figure number 2 in the capstan drive circuit 2 each represents a cue switch that is closed when the double speed playback button is pressed.
0 is set by play output a□ and stop output a
The first flip-flop (first
storage means), 21 is still output a3 during play mode
set by queue output aJ and stop output a
The second flip-flop (second
storage means), 22 is the cue output a during the play mode,
a third flip-flop, 2 set by the review output a3 and reset by the stop output a2;
3 is a standard playback servo that derives its output only in play mode, 24 is a monostable multi (pulse drive means) that is triggered by the play output a□ in still playback mode, and 25 is a triple-speed playback that derives its output in cue mode. Servo and M represent capstan motors, respectively.

FIG. 2 shows the operation sequence of this embodiment as a flow diagram, and the circuit operation of FIG. 1 will be explained below in accordance with the thick line path of FIG. 2 and the waveform explanatory diagram of FIG. 3.

First, when the play switch S□ is closed, the first flip-flop 20 is set and the low level output P is input to the standard playback servo circuit 23.
3 operates the capstan motor M.

Next, when the cue switch S is closed, the third flip-flop 22 is set, and the set outputs activate the triple reproduction servo circuit 25 and deactivate the standard reproduction servo circuit 23. The capstan motor M is driven at three times the normal speed.

Further, when the still playback switch S3 is closed, the third flip-flop 22 is reset and the triple speed playback servo circuit 25 is made inactive, and the second flip-flop 21 is set to replace the third flip-flop output. The second flip-flop output Q2 deactivates the standard reproduction servo circuit 23 and stops tape running.

Next, in the steel mode, when the play switch S0 is closed, the monostable multi-circuit 24 is triggered every time the play switch S0 is closed, and the monostable multi-output Q is applied to the first transistor Tr□, so that the level can be changed. The capstan motor M is driven by the emitter output for a certain period (1 frame) to enable frame-by-frame playback.

After that, when the stop switch S2 is closed, a reset pulse is applied to the first, second, and third flip-flops 20, 21, and 22 to set the stop mode.

In this embodiment, the operation order was explained in the order of BRAYMO-TALK, 1-mode → still mode → frame advance mode → stop mode, but from the circuit of this embodiment shown in FIG. It is self-evident that modes can be set in this order, so explanation will be omitted.

Therefore, according to the present invention, the play mode is set by closing the play switch from the stop mode, and frame-by-frame reproduction is possible by closing the play switch from the still mode.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is an explanatory diagram of the operating order, and FIG. 3 is an explanatory diagram of the main waveforms. Explanation of main drawing numbers, S engineering...Play switch, S
3...Still switch, 1...Remote control device, 2...Capsun drive circuit, 20.
...first flip-flop (first storage means),
21... Second flip-flop (second storage means), 23... Standard reproduction servo circuit, 24...
...Monostable multi (pulse drive means).

Claims (1)

[Scope of utility model registration request] a remote control device having at least a play switch linked to a normal playback operation and a stealth switch linked to a still playback operation; a first storage means for storing a closed circuit of the play switch; a second storage means for detecting closing of the stealth switch;
a standard regeneration servo circuit which is activated by the storage operation of the storage means and deactivated by the storage operation of the second storage means to cause the capstan motor to run at a constant speed; A remote control operation circuit comprising a capstan drive circuit including a pulse drive means that interlocks with the capstan motor to drive the capstan motor by a certain amount intermittently.