JPS6022749A - Auto-reverse type tape player - Google Patents

Abstract

PURPOSE:To attain the protection of a tape player and at the same time to ascertain the quality of tape by actuating automatically an injection mechanism when a fault occurs during a play. CONSTITUTION:When a tape reverse signal is produced from a generating circuit 12, the 1st counter 10 is reset to start measurement for 5sec. At the same time, the signal is supplied also to the 2nd counter 11 to count 1. The tape reverse signal is not produced for a while as long as a normal actuation is secured. Then the 2nd counter 11 is reset by the output of the counter 10. In case reverse actions are repeated owing to a fault, etc., the counter 11 closes the prescribed count-up before the counter 10 measures for 5sec. Then the counter 11 outputs an ejection signal to a terminal 13. In such a way, the damage of a tape player is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an auto-reverse type tape player, which is configured 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, unless the operator turns off the power to the device or manually ejects it, this state will continue indefinitely, damaging the device.

The present invention improves these drawbacks by providing a function for, for example, automatically reversing the tape within 6 seconds after it has been automatically reversed, and automatically ejecting the tape after this has been repeated six times.

This will be explained below along with examples. In Figure 1,
1o is a tenth counter that counts the above-mentioned 5 seconds, 11 is a 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.

Next, the operation of this embodiment will be explained. Generation circuit 12
If a tape reversal signal occurs, the first counter 10
is reset and starts measuring for 6 seconds. 2nd at the same time
The signal is also applied to the counter 11 of , which counts 1.

If normal operation is performed, the tape reversal signal will not be generated for a while, and the second counter will be reset by the output of the first counter 10.

However, as mentioned above, if the reversal operation is repeated due to a malfunction or the like, the second counter 11 will complete the predetermined count-up and send an eject signal to the terminal 13 before the i-first counter measures 6 seconds. Output. In this way damage to the device can be prevented.

Note that after repeating automatic reversal two or three times during tape winding, if the normal play mode is returned for some reason, 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.

Furthermore, even with the same reversal and operation, it would be unreasonable for the above-mentioned function to operate and automatically eject when the manual reversal 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.

Recently, microcomputers are sometimes used as a means for electronically controlling the players as described above. In this case, the above-mentioned functions can be realized by the software. FIG. 2 shows an example of a flowchart of the program. It should be noted that if the program ROM of the microcomputer has sufficient space, this function can be realized without adding any hardware and is effective.

Although the embodiments have been described above, the present invention is also useful for determining the quality of tape. In addition, even if configured in terms of nodes, it is easy to put it into practical use by simply preparing two types of counters.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of main parts of an autoreno tape player in one embodiment of the present invention, and FIG. 2 is a flowchart in another embodiment. 1o...First counter, 11 ...Second counter.

Claims (3)

[Claims] (1) Auto-reverse type % type % equipped with a means for detecting that the automatic reversal operation in the running direction of the tape is repeated a predetermined number of times within a predetermined period of time, and an ejecting means for automatically ejecting the tape based on the output of the detecting means. (2) Claim 1, characterized in that the ejecting means is provided with means for preventing the automatic ejecting function from working when the reversal is repeated manually.
The auto-reversing tape player described in section. (3) The auto-reverse according to claim 1 or 2, wherein the number of times of automatic reversal and the fixed time in the eject means are changeable, and the automatic reversal is realized by software of a microcomputer including an eject command. type tape player.