JPS6017065Y2 - tape deck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape deck, and more particularly to a display device for a tape deck.

Display devices for tape decks, especially cassette tape decks where it is difficult to confirm tape running, are used for recording, constant speed running,
Along with a mode display element corresponding to a mode switch such as fast forward, a tape running display device for indicating that the tape is running is provided separately from the mode display element.

However, in such a display device, the mode display element and the tape running display element are separated from each other, making it inconvenient to use, and the increase in the number of display elements complicates the structure.

An object of the present invention is to provide a tape deck that eliminates the above-mentioned drawbacks by using a mode display element for both mode display and tape running display.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of an example of an operating section of a tape deck, and FIG. 2 is a circuit diagram of an example of a display device according to the present invention.

In FIG. 2, reference numeral 1 denotes a switch means for selecting recording, fast forwarding, etc., which is operated in conjunction with, for example, a push-button button 2 shown in FIG.

Any switch of the switch means 1, such as the recording switch S
By closing □, the output of the switch means 1 is supplied to the next-stage control circuit 3, so the control circuit 3 puts each mechanism into the recording state, and also closes one end of the recording state display element L1 of the display means 4. A voltage (Figure 3a) is applied to.

The display element set is in a lighting state because the other end thereof is approximately at the ground level.

Furthermore, as each mechanism enters the recording state, the tape starts running at a constant speed.

As the tape runs, it detects the rotation of the reel shaft, which is composed of a shielding plate with a through hole that rotates in conjunction with the reel shaft, and light emitting and light receiving elements placed opposite each other with the shielding plate in between. As shown in FIG. 3, the reel shaft circuit detection circuit 5 generates a pulse signal, that is, a tape running signal, corresponding to the rotational speed of the reel shaft, that is, the running speed of the tape.

This tape running signal is converted into a waveform as shown in FIG.

The tape running display driving means 8 includes an oscillator 9 that generates a pulse signal of a predetermined period as shown in FIG. It is composed from.

The AND circuit 10 generates an output signal as shown in FIG. 3C in response to the input signal and supplies it to the display means 4.

In the display device having such a configuration, when the recording switch S1 is closed, the recording state is entered and the tape runs at a constant speed, so that the display element L1, which was in the off state, blinks, as shown in FIG. 3f. This indicates that the recording state is in progress and the tape is running.

Furthermore, if, for example, the tape detaches from the reel and wraps around other mechanical parts and becomes unable to run after a period of time T has elapsed after the recording switch S is closed, no output is supplied from the tape running detection means 6. The output terminal of the AND circuit 10 becomes approximately at the ground level, and the display element L1 is turned on, indicating that although recording is in progress, the tape is not being played.

It is clear that after the recording switch S□ is released, the display element L□ is turned off.

It is also possible to use the output signal of the tape running display drive means 8 to drive the automatic stop circuit 11 that immediately stops the operation of the tape deck when an accident occurs such as when the tape becomes unable to run as described above. .

In the above embodiment, the case of a recording operation has been described, but even in the case of other operations such as fast forwarding, the tape running can be similarly displayed by blinking the corresponding mode display element.

Incidentally, even if the tape running speed is high, such as in the case of fast forwarding or rewinding, a constant periodic blinking operation can be obtained regardless of the tape speed.

As explained above, by using the existing mode display element for both mode display and tape running display, the structure of the display section can be simplified and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an example of the operation section of the tape deck;
FIG. 2 is a circuit diagram of an embodiment of a display device according to the present invention;
FIG. 3 is a waveform diagram for explaining the operation of the circuit of FIG. 2. Explanation of symbols of main parts, 1...Switch means,
4...Display means, 5...Reel shaft rotation detection circuit, 6...Tape running detection means, 8...
. . . Tape running display drive means, 9 . . . Oscillator, 10 . . . AND circuit.

Claims (2)

[Scope of utility model registration request] (1) A tape deck having a plurality of mode switches and a plurality of mode display elements that are provided corresponding to the plurality of mode switches and light up in accordance with the operation of these switches, which generates an output when the tape runs. 1. A tape deck comprising: a tape running detecting means; and a tape running display driving means for blinking the mode display element at a constant cycle regardless of the tape running speed in accordance with the output of the tape running detecting means. (2) The tape running display driving means is characterized by comprising an oscillator that generates the pulse signal of a constant period, and an AND circuit that receives the respective outputs of the tape running detecting means and the oscillator. A tape deck according to claim 1 of the utility model registration claim.