JPS5933651A - Automatic music selector of cassette tape - Google Patents

Abstract

PURPOSE:To prevent the damage of a cassette half due to a reproducing head, by detecting the loading of a cassette tape and starting the traveling of the tape with a delay given by a delaying means for a period of loading the tape. CONSTITUTION:When a cassette tape is almost loaded, a current is supplied from a power supply Vcc through a detecting switch SW1. Then the input voltage of an inverter 2 is gradually increased via an integration circuit 1, and the output of the inverter 2 becomes negative with a delay equivalent to the time during which the loading of tape is over. A delayed pulse signal is supplied to a gate circuit 4 via a differential circuit 3, and at the same time a signal is also supplied to the circuit 4 from an automatic music selecting circuit. Then the output of the circuit 4 is supplied to a review terminal of a mechanism control circuit 6 via an inverter 5. A mechanism 7 has a review action by the output of the circuit 6. This prevent the damage of a cassette half due to a reproducing head.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic music selection device for cassette tapes.

Conventional automatic music selection devices for cassette tapes have been configured to automatically switch to automatic music selection operation as soon as the cassette half is loaded into the playing position, but it is detected that the cassette half is being loaded securely. Before the switch was activated, the playback head moved and hit the cassette half before the cassette half was in place.1 The mechanism shifted to automatic song selection without the cassette half being securely loaded. First, it has the disadvantage of causing an accident that may cause the mechanism to malfunction.

The present invention has been made to solve the above-mentioned drawbacks, and is accomplished by detecting the loading of the cassette tape and starting the running operation of the cassette tape after a delay by means of delay means for a period of approximately 7 days when loading is approximately completed.

The present invention will be explained by way of one embodiment.

FIG. 1 is a block diagram showing one embodiment of the present invention. When a cassette tape is put into a cassette tape storage case of an automatic cassette tape playing device and loaded into the automatic playing device, a horned half detection switch SW is provided as a detection means for detecting a cassette tape stored in a playing position.

When the cassette tape is approximately loaded into the playing position, the presence of the cassette half is detected. As for the detection means, optical means, '' or mechanical means can be used. When the cassette tape is almost loaded, the detection switch SWt is closed and the integration circuit 1 performs integration. Current is supplied from the power supply Vcc to the resistor R1 and capacitor C1 of the integrating circuit through the overload detection switch swf, and the input voltage of the inverter 2 gradually increases. After the detection switch SWf closes, the output of the inverter 2 becomes negative after a delay that is longer than the time required to ensure that the cassette tape is loaded and locked, and that loading is approximately completed. When the detection switch 5-Wl is closed, the motor for driving the mechanism (not shown) is activated, and when loading of the cassette tape is almost completed, the rotational speed of the motor rises to the steady rotational speed L7, and the mechanism can be driven normally at any time. become a state. When the output of the inverter 2 becomes negative, a delayed input voltage (pulse signal) is generated in the gate circuit 4 through the capacitor C2 and resistor R2 of the differentiating circuit 3. A signal from an automatic music selection circuit 8 instructing an automatic music selection operation is also applied to the gate circuit 4. The output of the gate circuit 4 is applied to the inverter 5, and the output of the inverter 5 is applied as a negative pulse signal 7 to the review terminal of the mechanism control circuit 6, which causes the mechanism 7 to operate as a review. The structure is made up of:

When automatically selecting songs for karaoke, etc., instruct automatic song selection (using an automatic song selection button, etc., not shown).

When the cassette tape is loaded into the storage case and stored in the performance position, the cassette top is detected (7), and when the detection switch SWj is closed, the motor starts rotating and the cassette tape is locked in the L/play position. After approximately one to several seconds, the mechanism enters review operation and rewinds the tape.

When you specify which song to select, the number of songs or gaps between songs is automatically counted from the beginning of the tape, and the 1V mode is set so that the review operation will not start unless the specified song is stored in the playing position for the specified time. By doing this, you can stop the storage of the cassette tape midway, prevent it from shaking during storage, causing the tape to get caught up in the drive unit, or damaging the old head by putting it on the cassette half, and the mechanism. The dog is protected and the automatic selection action ensures the effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of essential parts for explaining the operation of an embodiment of the present invention. SWl is a detection switch, 1 is an integration circuit, 2- and 5-digit inverters, 3-digit differential circuit, 4 is a gate circuit, 6-digit mechanism controller, troll circuit, 7 is a mechanism, and 8-digit automatic music selection circuit. Applicant: Nippon Columbia Co., Ltd.

Claims (1)

[Claims] A cassette tape storage case into which a cassette tape is loaded in an automatic P-curve device for cassette tapes, and a detection means for detecting a loaded cassette half stored in seven performance positions;
It has a delay means that shifts to the automatic song selection operation after a period of time when loading is approximately completed from the time detected by the detection means, and the tape running operation is performed after a period of time when loading is completed after loading the cassette tape. An automatic music selection device for cassette tapes.