JPH0359496B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an auto-reverse type tape player, which is adapted to automatically eject a cassette tape, micro-cassette tape, etc. in the event of an abnormality.

Normally, in this type of player, when the tape reaches the end during tape play, the rotation detection circuit of the reel stand performs "end detection", automatically reverses the play mode, and returns to the play mode. However, even if a defective cassette tape is played, or if a tape winding problem occurs for some reason, the end detection circuit is activated and the automatic reversal operation is repeated. In this case, the operator must turn off the power to the device or
This state will continue indefinitely unless it is manually ejected, damaging the device.

The present invention improves these drawbacks by providing a function for, for example, automatically reversing the tape within 5 seconds after it has been automatically reversed, and automatically ejecting the tape after this has been repeated 5 times.

This will be explained below along with examples. In FIG. 1, 10 is the first counter that counts the above-mentioned 5 seconds, 11 is the second counter that counts the number of automatic reversals, 12 is a tape reversal signal generation circuit, and 13 is an eject signal output terminal. be.

Next, the operation of this embodiment will be explained. When the tape reversal signal is generated from the generation circuit 12, the first
The counter 10 is reset and starts measuring for 5 seconds. At the same time, the tape inversion signal is applied to the second counter 11, and the second counter 11 counts up. If the tape player is operating normally, no tape reversal signal is generated and the first
The counter 10 of the counter 1 becomes the second counter 1 after 5 seconds have elapsed.
Sends a reset signal to 1.

However, if the automatic reversing operation is repeated due to a malfunction of the tape player, etc., the first
Since the second counter 11 is reset by the tape reversal signal before the second counter 10 counts for five seconds, the second counter 11 cannot be reset.
counts a predetermined number of tape inversion signals and outputs an eject signal to the terminal 13. This eject signal causes the eject mechanism to operate and eject the tape. Therefore, damage to the tape player due to repeated automatic reversal can be prevented.

In addition, if the normal play mode is restored for some reason after repeating automatic reversal two or three times during tape winding, the output of the first counter 10 can be used to reset the second counter 11. It will not be automatically ejected unless there is an abnormality.

Further, even if the same reversing operation is performed, it is unreasonable for the above function to operate and automatically eject when manual reversing operation using the program key is repeated in a short period of time. Therefore, a separate function or circuit for distinguishing between manual reversal and automatic reversal may be provided to prevent the second counter 11 from counting up during manual reversal.

Furthermore, recently, microcomputers are sometimes used as a means for electronically controlling the above-mentioned players. In this case, the above-mentioned functions can be realized by the software. Second
The figure shows an example of a flowchart of the program. Furthermore, the microcomputer program
If there is enough ROM, this function can be implemented without adding any hardware and is effective.

Although the embodiments have been explained above, according to the present invention,
Ejecting is automatically applied in the event of an abnormality during play, which protects the player and is also useful for determining the quality of the tape. Moreover, even if it is constructed in terms of hardware, it is easy to put it into practical use by simply preparing two types of counters.

[Brief explanation of drawings]

FIG. 1 is a block diagram of essential parts of an auto-reversing tape player according to one embodiment of the invention, and FIG. 2 is a flowchart of another embodiment. 10...first counter, 11...second counter.

Claims (1)

[Scope of Claims] 1. A first counter means that is reset by a tape reversal signal generated during automatic reversal operation of the tape running direction and measures a predetermined time; and a first counter means that is reset by the output of the first counter means and measures the tape reversal signal. a second counter means for counting the second counter means;
An auto-reverse type tape player comprising eject means for automatically ejecting the tape in response to an eject signal output when the counter means counts a predetermined number of times. 2. The auto-reverse type tape player according to claim 1, wherein the eject means includes means for distinguishing between manual reversal and automatic reversal, and the second counter is not counted up during manual reversal.