JPS6313271B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a player for a disc-shaped medium (hereinafter referred to as a "video disc") containing video and audio information, and particularly to a player for effectively operating a video disc containing an educational program. Regarding a video disc player suitable for.

When using a video disk containing a language practice program for educational use, for example, follow the teacher's instructions on the playback screen to forcibly or voluntarily stop the playback screen, repeat the pronunciation practice, and then restart it. It is convenient to be able to immediately resume playback from where it was previously stopped. for that purpose,
It is desirable to provide the player with a configuration for a pause function.

Furthermore, some video disc players are capable of repeat playback. For example, on a TED video disc, one frame worth of video signals is recorded per revolution of a spiral recording track (groove), and in a video disc player, it is necessary to stop feeding the pick-up that reproduces the signal from the disc. Therefore, substantial still image playback can be realized. At this time, the pick-up moves a little in the radial direction along the recording track, and when it reaches its elastic limit, the needle skips, returns to its original position, and starts tracing along the recording track again. That is, by repeating this operation, substantial still image reproduction can be performed.

Still image playback is not limited to the TED format, but can also be realized with video discs of other formats (eg, VLP format).

Although some known tape recorders have such a pause function, such a configuration cannot easily be applied to a video disc player, which has a significantly different mechanism.

Video discs are designed so that they can be loaded into and unloaded from players without touching them directly. During this loading or unloading, the means for driving the video disk must stop rotating. This is necessary to prevent the video disc from being blown away by the rotary table that constitutes the driving means when the video disc is not fixed to the driving means, and causing the peripheral side of the video disc to hit the surrounding wall and be damaged. has been done. Therefore,
When the stop button of the player is controlled, the power supply to the driving means is cut off, and at the same time, a brake is applied to the driving means.

Conventional players of this type are not equipped with a structure for a pause function, so in order to realize a function similar to this function, the drive means must be temporarily stopped by controlling the stop button, and then It was necessary to control the play button to drive the drive means again. Therefore, there is an undeniable drawback that the play operation is delayed by the so-called rise time until the drive means exhibits stable rotation. Therefore, it is effective to realize a video disc player with a pause function.

By the way, the pause operation can be performed either arbitrarily by the user or automatically in response to a cue signal recorded on a video disc. On the other hand, some video disk players are capable of repeat playback, and there is a risk that a cue signal will be detected against the user's will during repeat playback, resulting in a pause state.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a video disc player that eliminates the above-mentioned disadvantages. Next, one embodiment will be described with reference to the drawings.

FIG. 1 is an external configuration diagram of a player according to the present invention. The left half of this player is provided with mechanisms for loading, unloading, and driving the video disc, and the right half is provided with mechanisms related to its control system. The details are the invention related to the applicant's earlier application (Japanese Patent Application Laid-Open No. 11714/1983)
The operating procedure will be briefly explained below. Press the power switch 1 to put the player into operation, set the rotary knob 2 to position A, open the lid 3 toward you to create a space for inserting the envelope, and insert the envelope containing the video disc in the space (not shown). Insert it once and then remove it immediately. Only the video disc is then left in the space.

Next, when the knob 2 is rotated to the C position, the video disc is fixed to a drive means (not shown) and loading is completed until the knob 2 reaches the B position. At the same time, a pick-up (not shown) is brought from its rest position to a position facing the outermost circumference of the video disk. Next, when the play button 4 is pressed, the play switch 7 that supplies power 6 to the motor 5 constituting the driving means is turned on (see Fig. 7), and the play lever 8 is pushed against a return spring (not shown). , the play lever is moved from the reference position to the operating position shown in the second figure and locked in that position by the locking means 9.

In conjunction with this movement of the play lever, the pickup is lowered so as to come into pressure contact with the video disk (not shown), and the worm 10 connected to the drive means is connected to the pickup feeding drum 11. This drum 11 can be controlled by the knob 2 when the worm 10 is not connected, but when it is connected as shown in the figure, the drum 11 becomes uncontrollable due to the load, and instead is fed at a constant speed by the motor 5. will be done.

Further, in conjunction with the movement of the play lever 3, the brake lever 12 is also rotated counterclockwise around its support shaft 12a against a return spring (not shown), thereby moving the brake rod 13 in the direction of the arrow. The application of the brake to the pressing drive means is released.

During this play operation, press the select button 14.
When the select lever 15 supporting the worm 10 slides downward on the play lever 8, the worm 10 is temporarily removed from the feed drum 11, and during that period the pick-up stops feeding and the same signal is output. So-called repeat playback, in which playback is performed repeatedly, becomes possible. After this period has elapsed, the game returns to normal play mode.

Next, when the stop button 16 is controlled, the lock lever 17 constituting the lock means 9 is rotated counterclockwise around its support shaft 17a against the spring 18, releasing the lock and releasing the play lever. 8 to return to the standard position. In conjunction with this, the pickup is moved away from the video disk, and the worm 10 is moved away from the feed drum 11.
, the key of the safety lever described later is removed, and the brake rod 13 is returned to its original position.

Of course, the play switch 7 is also opened. All mechanisms are then returned to a ready-to-play state.

Next, when the knob 2, which was located between C and D and displayed the play position, is returned to position A via positions C and B, the pick-up is returned to its rest position, and the disc drive means is moved to the position where the disc is Release.

Then, when an empty envelope is inserted into the envelope input space, the video disk can be re-stored therein according to the input operation, and unloading is completed when the envelope is then taken out.

When this player is in the playing state as shown in FIG. 2, when the pause button 19 shown in FIG. 1 is pressed, the indicator light 20 lights up to display the pause action,
The command is applied to flip-flop 22 through OR gate 21 as shown in FIG. 6, and energizes solenoid 23 and relay 24 until a pause release command is received.

Due to the operation of the solenoid, the plunger 25 is suctioned as shown by the arrow in FIG. 9 is released, the play lever 8 is returned from its operating position to its reference position, and the same operation as the above-mentioned stop operation is performed. However, since the other arm 27b of the pause lever acts to prevent the brake lever 12 from returning, it prevents the application of a braking action to the driving means including the motor 5.

Further, when the play lever 8 returns, the play switch 7 is opened to cut off the power supply to the motor 5, but the switch 25 of the relay 24, which is activated at the same time as the power supply to the solenoid 23, is closed. continues to supply power to the motor (see Fig. 7). Therefore, stable rotation of the motor is guaranteed in the same way as during play operation, and on the other hand, when the pick-up is released from pressure contact with the video disk (that is, the playback output is cut off), the automatic feed of the pick-up is released. , is set in a so-called pause state. At this time, the safety lever 28 attached to the pause lever 27 so as to be able to slide thereon is lifted upward together with the pause lever, and as shown in FIG. The knob 2 is guided to the recess of the cam 29 provided in the knob 2, and the knob 2
cannot be moved beyond the play motion area (between C and D in FIG. 1). This means that the knob 2, which can be moved freely during the pose, is
This is to prevent the video disk from being moved to the A position and being unfixed by the video disk drive means. This keying operation is also possible when the play lever 8 is in the operating position, that is, in the normal play mode, because the pawl 8a pushes the safety lever 28 upward against the spring 30. I have to.

The relay 24 is configured to operate a squelch circuit (not shown) in the pause mode, so that noise during the pause does not appear on the speaker or screen.

To release the above pause state, the play button 4 may be controlled to set the play mode. As a result, the flip-flop 22 is reversed and the power supply to the solenoid 23 and the relay 24 is cut off to release the pause state, and the above-mentioned play state is set. That is, since the attraction of the plunger 23 is released when the play lever 8 moves to its operating position, the play lever can be locked by the locking means.

Further, the brake lever 12 is supported by the play lever 8 instead of the arm 27b of the pause lever, and the brake release state is maintained continuously.

In this way, when the player is in the play state, the player can enter the pause mode by simply pressing the pause button 19, and can be canceled by controlling the play button 4, so the viewer can play at any point in the program. You can easily stop the playing motion, practice repeating the pronunciation, and then immediately resume playback from where it was previously stopped.

The above-mentioned pause movements are performed at the discretion of the viewer, but in the present invention, they are
By recording the cue signal, it is possible to force the robot to take a pause action according to the program.

That is, a cue signal is recorded in a recording track corresponding to a playback screen on which a pause action is desired (for example, the last few frames of a portion instructing pronunciation practice). For recording cue signals, (a) For example, outside the video and audio carrier bands,
(b) A method of adding a cue signal to a position of 0.4 MHz, (b) A method of adding a cue signal to a position outside the audible frequency band of an audio signal, for example, 30 KHz, (c) A method of adding a cue signal to a position of a horizontal or vertical blanking period of a video signal. Any method such as adding a cue signal can be adopted.
In addition, the cue signal is recorded over at least one rotation of the disk (that is, one frame on a TED disk), and to prevent malfunctions, it is recommended that the cue signal be recorded over several rotations. desirable.

Then, as shown in Fig. 6, the cue signal is detected by the detector 31 (in the case where the cue signal is recorded for several revolutions, for example, when the cue signal is detected for two consecutive revolutions) ), the pause state can be set by supplying the cue signal pulse, which is the detection output, to the OR gate 21 through the switch 32. That is,
Pause mode setting means is configured to detect the cue signal, stop the transfer of the pickup, and cut off the playback output.

Now, since the video disk player is put into a pause state using the cue signal stored in this way, there is a possibility that repeat playback (still image playback) may not be possible even if the screen is the one the user desires. There is. For example, as described above, if a cue signal is recorded in the last few frames of the part instructing pronunciation practice, this part cannot be repeatedly played.

Therefore, the switch 32, which responds to the control of the select button 14, prevents the playback of the cue signal from falling into a pause state when in the select state.

Note that the detector 31 must be configured as appropriate depending on the method of recording the cue signal, but since this is recognized as obvious to those skilled in the art, the explanation thereof will be omitted.

Although the above explanation is about a video disc and a video disc player according to the so-called TED method, the present invention is not limited to the TED method, and can be applied to other video disc methods (for example, the optical VLP method). It goes without saying that the present invention can be applied to video disc players of the following types.

As described above, the present invention is effective in preventing the user from entering a pause state against his or her will during repeat playback.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of the player of the present invention. Figures 2 and 3 are plan views of the main parts of the operating system; Figure 2 shows the play state, Figure 3 shows the pause state, Figure 4 is a perspective view of the Bose lever, and Figure 5. 6 is a plan view of the keying mechanism, FIG. 6 is a pause operation control circuit diagram, and FIG. 7 is a motor power supply circuit. 5... Motor, 4... Play button, 8... Play lever, 16... Stop button, 27... Pause lever, 19... Pause button, 31... Cue signal detector.

Claims (1)

[Claims] 1. A driving means for rotationally driving a disk-shaped medium containing video information, audio information, and cue signals;
a pick-up for obtaining playback output from the disk-shaped medium; a pick-up transfer means for moving the pick-up in a radial direction of the disk-shaped medium in a play mode; and a select mode setting means for stopping the transfer of the pick-up in response to an instruction from a select button. , the Cue from the playback output
A video camera comprising: pause mode setting means for detecting a signal to stop the transfer of the pickup and cut off the playback output; and switch means for prohibiting operation of the pause mode setting means in response to operation of the select button. disk player.