JPS63179439A - Magnetic tape running controller - Google Patents

Abstract

PURPOSE:To reduce the time of blank skip processing by reversing the tape running in detecting a connection tape or a tape end at the fast forwarding motor after the end of music of one side, afterwards, selecting the reproduction mode. CONSTITUTION:A control section 1 decides whether or not the blank skip (B.S) mode is selected and decides whether or not the reproduction mode is selected in case of the B.S mode, and decides the generation of an interblock detection signal and the elapse of the generated time in case of the reproducing mode. When all of them are decided as YES, the fast forwarding mode, that is, the blank skip operation is initiated. Then the no recording state is decided again, and the presence of the detection signal from a connection tape detection circuit 2 is decided, then the connection tape detection signal is detected, then the reverse mode reversing the tape running is obtained and the reproduction mode is attained. Thus, the fast forwarding is reduced and the fast forwarding and rewinding are not required. Thus, the waiting time at the no recording part after the end of the music is reduced, and irritation of a listener is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic tape running control device, and particularly to a magnetic tape running control device suitable for application to a tape playback device equipped with a blank skip function.

[Summary of the Invention] The end of the tape is detected by optically detecting the white connecting tape connected to the start and end ends of the tape wound on the reel or by other means.

Upon this detection, the drive mechanism during fast forwarding is released and reversed, and the playback operation is started to quickly perform the blank skip operation.

[Prior Art] In recent years, tape players have been developed that have a so-called blank skip function that fast-forwards relatively long unrecorded portions at the tape end and tape start during tape playback.

This blank skip function, for example, detects a blank (usually a 5 to 10 second unrecorded part) after the last recorded song on side A, and fast-forwards the tape, and when the tape reaches the end. At the same time, switch to reverse mode and fast forward again.

Then, when the beginning of the first song is detected, the tape is rewound by the amount corresponding to the overrun, and then the eight sides are played back. The user can select whether or not to use this function.

By providing such a function, it is possible to shorten the waiting time in the unrecorded section after the end of a song, and eliminate the listener's sense of irritation.

[Problems to be solved by the invention] However, in the conventional magnetic tape running control device, A
Between the end of the last song on side 8 and the playback of the first song on side 8, as shown in Figure 5, side A plays ■ → Fast forward ■ → Reverse ■ → B
Since the mode is changed and driven at each stage of fast forwarding → overrun rewind → B side playback, it takes a considerable amount of time to start playing the reverse side, although it is called blank skipping. was.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic tape running control device that is capable of reducing the time required for blank skip processing.

[Means for solving the problem] The above object is achieved by reversing the tape running upon detecting the connected tape or the end of the tape in the fast forward mode after the end of one side, and then switching to the playback mode. .

[Function] In the fast-forward mode after one side ends, the connected tape detection circuit or the tape end detection circuit detects the timing of reversal of tape running. As a result, the tape in the fast-forward state is reversed and can immediately enter the playback state, so there is no need for fast-forwarding on the reverse side due to blank skipping and rewinding for the overrun.

[Embodiments of the Invention] Eleven magnetic tape running control devices according to the present invention will be described in detail below.

FIG. 1 shows an embodiment of the present invention, in which a control section 1 serving as the center of control is configured using a microcomputer, and this control section 1 includes a connected tape detection circuit 2, an unrecorded detector 3, and a drive mechanism. 4 are connected. Connection tape detection circuit 2
The white connecting tape 53 used to connect the magnetic tape section 51 and the leader tape section 52 at the end of the magnetic tape 50 is optically detected. The sensor section includes a light emitting element 21 that irradiates light onto the tape surface, and a light receiving element 22 that receives light reflected from the light emitting element 21 on the surface of the connecting tape 53 and converts it into electricity. The output of this light receiving element 22 is amplified by an operational amplifier 23 and then output at a binary level.

The non-recording detector 3 generates an output signal ranging from H level to H level when the output of the playback head 6 disappears and a silent state occurs.

The WI7A moving mechanism 4 also includes a pinch roller drive unit 41. which suppresses or releases the pinch roller. It is configured to include an FF/REW gear drive unit 42 that combines gears for fast forwarding or rewinding the tape, and a motor direction switching unit 43 for reversing the tape direction, each of which is controlled by the control unit 1. Ru.

FIG. 2 is a perspective view showing the arrangement of the head section and the cassette. The playback head (or recording/playback head) 11 is arranged so that it can move back and forth toward the cassette according to the tape height of the tape cassette 10, and capstans 12 are provided on both sides of the playback head (or recording/playback head) 11.
Pinch rollers 14 and 15 are arranged opposite to and 13.

Depending on the running direction, only one of the pinch rollers 14 and 15 comes into pressure contact with the capstan via the tape.

A connection tape detection circuit 2 is provided between the reverse side pinch roller 15 and the head 11, and each component is mounted on a small printed circuit board.

Note that the entire circuit does not need to be disposed at this location, and only the sensor section may be provided.

Next, the operation of the above configuration will be explained with reference to the flowchart of FIG.

The control unit 1 monitors each of the non-recording detection signal, the connected tape detection signal, the tape running state signal, and the mode selection signal (whether or not the blank skip mode is selected) at predetermined time intervals.

First, in step 31, the control unit 1 performs a blank skip (B
, S) determine whether mode 31 is selected;
If it is the playback mode, it is determined whether the recording mode is the playback mode (step 32). If the playback mode is the playback mode, the generation of the no-recording detection signal and the elapsed time of its occurrence are determined in steps 33 and 34. If both are determined as YES, the mode enters fast forward (FF) mode, that is, blank skip operation (
Step 35).

Next, the non-recording state is determined again (step 36), and the presence or absence of a detection signal from the connected tape detection circuit 2 is determined (step 37). If a connected tape detection signal is detected, the tape is switched to reverse mode in which the tape running is reversed. (step 38), and then enters playback mode. Note that if it is determined in step 36 that the state is other than a non-recording state,
Since this means that the recorded song is not the last song but the middle song, the playback mode is entered after rewinding once (step 40).

By employing such a blank skip process, the fast-forward time shown in FIG. 5 is shortened, and the fast-forward time shown in FIG. Therefore, the number of tape running mode switches can be reduced from five stages to three stages, thereby making it possible to shorten the playback start time of the reverse song, reduce switching noise, and reduce discomfort.

FIG. 4 shows another embodiment of the present invention, in which a tape end detection circuit 16 is provided in place of the connected tape detection circuit 2 of FIG. To detect the end of the tape, a plurality of permanent magnets 17 are arranged on the reel base so as to rotate together with the reel.

This is done by arranging the electromagnetic transducer 18 close to the permanent magnet 17. In the figure, 19.degree. 20 is a plunger for driving the pinch rollers 14 and 15.

While the tape is running, the reel base rotates, the permanent magnet 17 rotates, and the electromagnetic transducer 18 generates pulse voltages at intervals corresponding to the rotation speed. The output voltage of this element 18 is subjected to signal processing by the tape end detection circuit 16 and then output to the control section 1.

Incidentally, the blank skip processing in the embodiment of FIG. 4 is as follows:
In FIG. 3, step 37 is "Connected tape detected?"
Instead of processing, "Tape end detected?" is replaced.

[Effects of the Invention] As explained above, according to the present invention, the number of mechanism switching stages in blank skip can be reduced, so the playback start time of the first song on the reverse side can be brought forward, and the number of switching sounds generated can be reduced. can be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the peripheral portion of the head, FIG. 3 is a flow chart showing blank skip processing in the present invention, FIG. 4 is a block diagram showing another embodiment of the present invention, and FIG. 5 is a conventional FIG. 3 is an explanatory diagram showing blank skip processing. 1... Control unit, 2... Connection tape detection circuit. 3... No recording detector, 4... Drive mechanism, 5... Magnetic tape. 6... Head, 16... Tape end detection circuit. 17...Permanent magnet. 18...Tape end detection circuit. 21... Light emitting element. 22... Light receiving element. 52... Connection tape. Patent applicant Clarion Co., Ltd. Figure 3 Figure 4

Claims (3)

[Claims] (1) In a magnetic tape player equipped with a blank skip function that fast-forwards when a non-recording state of a certain length or more is detected during playback of a magnetic tape and starts the next track, the end of the magnetic tape A magnetic tape running device comprising: a tape end detection means for detecting a tape end; and a control means that reverses the tape running when a detection signal by the means is generated during a blank skip mode and then puts the tape into a playback state. Control device. (2) The magnetic tape running control device according to claim 1, wherein the terminal end of the magnetic tape is a connecting tape that connects a magnetic tape section and a leader tape section. (3) The magnetic tape running control device according to claim 1, wherein the end portion of the magnetic tape is the end of the magnetic tape.