JPS59132441A - Running display device of magnetic tape - Google Patents

Abstract

PURPOSE:To prevent a tape deck from being damaged due to mistaking a pause for a stop and to eliminate the need for the countermeasure by displaying distinctively the running of a magnetic tape also the stop state and the pause state. CONSTITUTION:The oscillating frequency of an oscillator 6 is changed over into two stages as recording/reproduction and quick traverse/quick reverse to switch the flickering speed of a light emitting body 8. When the tape is not run, the oscillation is stopped and only a part of the light emitting element 8 is lighted by a control circuit (not shown). The switching of up-count and down-count of an up-down counter 7 is performed depending on the running direction of the magnetic tape and the order of lighting of the light emitting element 8 is made in the same direction as the running of tape. The power supply of the light emitting element 8 is supplied from a transistor(TR) 11 except for a D3. The TR11 is turned off only when the tape is in the pause state and turned on in other cases. In flickering the light emitting elements 8 one by one in order at the pause state, only the D3 of the light emitting elements 8 is flickered at the pause state.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic tape running display device Q.
It is an object of the present invention to display not only the running of the magnetic tape but also whether the tape running mechanism is in a stopped state or a temporarily stopped state on the same display device.

Conventional configuration and its problems A conventional travel display device will be explained with reference to the drawings.

FIG. 1 shows an example in which the running display is performed mechanically, in which the rotation of a magnetic tape reel shaft 1 is caused by a belt 2 to rotate a rotary drum 3 having a slit-shaped notch 31L partially formed therein. This rotating drum 3 contains a lamp 4,
Due to the rotation of the rotary drum 3, the light from the lamp 4 leaks through the groove-shaped notch 3a of the rotary drum 3, is guided to the light guide 5, and only a part of the end face of the light guide 6 shines. The speed and direction of the light travel are determined by the speed and direction of rotation of the rotating drum 3.

In this way, since the rotating drum 3 is connected to the reel shaft 1 of the magnetic tape by the belt 2, one rotation of the drum 3 corresponds to the running of the magnetic tape, and the running of the light on the end face of the light guide 5 is as follows. It shows the running direction and running speed of the magnetic tape, and when the magnetic tape is not running, only a part of the end face of the light guide 6 is illuminated.

Fig. 2 shows an example in which the oscillator 6 is connected to an up/down counter 7, and its output is sent to a decoder in order to sequentially turn on and blink a plurality of light emitting elements 8 such as lamps and light emitting diodes. 9 and a drive circuit 10 that drives the light emitting element 8 . The oscillation frequency of the oscillator 6 is changed in accordance with the running speed of the magnetic tape.

For example, the oscillation frequency of the oscillator 6 is switched in two stages depending on the speed of the magnetic tape during playback/recording, fast forwarding, and early spring return, and the point deceleration of the light emitter 8 is switched.

Further, when the tape is not running, excavation is stopped and only a portion of the light emitting elements 8 are lit by a control circuit (not shown).

The up/down counter 7 is switched between a-knob counting and down counting depending on the running direction of the magnetic tape. As a result, the light emitting elements 80 are turned on in the opposite direction, and light runs in the same direction as the tape runs.

Although the conventional system described in FIGS. 1 and 2 can indicate the running state of the magnetic tape, it cannot indicate whether the tape running mechanism such as a tape deck is stopped or temporarily stopped. As is well known, when the tape is stopped, there are two states: a stopped state and a paused state.
In particular, when compact cassette tapes and micro cassette tapes are paused, the recording/playback head is usually inserted into the cassette, and the cassette tape is loaded and
It cannot be removed.

With the conventional method shown in Figures 1 and 2, it is not possible to distinguish between a stopped state and a paused state, so if you forcefully load or remove a cassette tape without knowing the paused state, the set will be interrupted. There is a problem with it being damaged.

OBJECT OF THE INVENTION The present invention solves these conventional problems, and provides a system that not only displays the running of the magnetic tape but also indicates whether the tape running mechanism is stopped or temporarily stopped. The purpose is to display the information.

Structure of the Invention The present invention includes a plurality of light emitting elements, and the light emitting elements blink sequentially as a magnetic tape runs, and the blinking order and point deceleration of the light emitting elements correspond to the running direction and running speed of the magnetic tape. a magnetic tape running display function that changes when the tape running mechanism changes, and when the tape running mechanism that runs the magnetic tape is in a stopped state, only a part of the light emitting element is lit; and when the tape running mechanism is temporarily stopped, the light emitting element is turned on. It is equipped with a function to make some or all of the parts blink, and it is possible to display not only the tape running display but also whether the tape running mechanism is stopped or temporarily stopped on the same display device. Possible 0 Description of Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The configuration from i to the light emitting element 8 in FIG. 3 is the same as that in FIG. 2. The power of the light emitting element 8 is supplied from the transistor 11 except for D3. The transistor 11 operates as a switching element, and is configured to be turned off only when the tape is temporarily stopped, and turned on at other times.

Here, if the light emitting elements 8 are made to blink one by one in the paused state, then the light emitting elements 8
Since power is supplied only to D3 among them, if only D3 of the 5 light emitting elements 8 blinks, it becomes K.

Of course, it is also possible to provide a dedicated oscillator that oscillates at a predetermined cycle during a pause, and use this output to blink a specific light emitting element 8 or all light emitting elements 8. The same effect can be achieved even if the lamp of the configuration shown in FIG. 1 is blinked using the output of the above-mentioned exclusive excavator. In this case, the light guide 6 will act as a display element in FIG. 1.

Effects of the Invention By using the present invention, it is possible to distinguish between the stop state and the pause state, and to display this display on the tape running indicator, so all magnetic tape-related information can be found in one place. You can concentrate on the display, and its functionality is greatly improved.

In addition, the tape deck will not be damaged due to a mistake between the paused state and the stopped state, and there is no need to take measures to prevent this.

[Brief explanation of the drawing]

1 and 2 are perspective views and block diagrams showing a conventional magnetic tape running indicator, and FIG. 3 is a block diagram showing a magnetic tape running indicator according to an embodiment of the present invention. 6...Oscillator, 7...-Updan counter, 8...Display element, 9...Decoder, io...Drive circuit, 11...・・・Transistor for switch.

Claims (1)

[Claims] A magnetic tape comprising a plurality of light emitting elements, the light emitting elements sequentially blinking as the magnetic tape runs, and the blinking order and blinking speed of the light emitting elements correspondingly changing depending on the running direction and running speed of the magnetic tape. a running display function, and when a tape running mechanism for running the magnetic tape is in a stopped state, only a part of the light emitting element is lit; and when the tape running mechanism is in a temporarily stopped state, a part or all of the light emitting element is blinked; What is claimed is: 1. A magnetic tape running display device characterized by having a function of