JPS6230Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a memory switch operation display device in a tape recorder.

Generally, tape recorders are equipped with a tape counter that is linked to the running of the tape in order to relatively display the running position of the tape or to display the running time of the tape. A switch is attached to the tape counter that operates when each number wheel shows a predetermined display, and by resetting the counter to zero at the start position of the tape, the start position is stored in the tape counter, and the start position can be stored at any position. There is a so-called memory stop function that operates the switch when the tape is rewound and returned to the start position, and this signal automatically stops tape rewinding at the start position. A control method such as a so-called memory play function is employed, which automatically stops rewinding at the tape start position and automatically switches to a playback state. Such a tape counter switch is generally called a memory switch, and a tape counter having such a memory switch is also called a memory counter.

By the way, tape running modes such as memory stop and memory play are configured so that the operator can select them according to his/her wishes, and the power supply of the control circuit to which the memory switch is connected A memory operation selection switch 1 as shown in Figure 1 is used as a switch.
4 is provided on the operation panel 12 of the tape recorder 10.

On the other hand, in a cassette type tape recorder, etc., a tape end detection mechanism is provided, and the tape rewinding state is automatically stopped by this end detection mechanism.

Therefore, the operator simply desires to rewind the tape and presses the rewind operation button, without checking the input position of the selection switch 14 for memory operation mentioned above and the display of the memory counter, and then rewinding the tape. When rewinding a tape, if the rewinding stops automatically, it cannot be immediately determined whether the rewinding is automatically stopped by the memory switch or by the end of the tape.
In order to know this, one had to check the input position of the selection switch 14 and the display on the memory counter, or check the amount of tape wound, or both. In particular, depending on the type of tape recorder, it may be impossible or difficult to see the winding status of the cassette tape.

In order to solve this problem, as shown in Figure 1, a memory stop indicator lamp 16, which lights up to indicate when the memory switch is activated and rewinding automatically stops, and a tape end detection mechanism are activated. Although it is conceivable to arrange the lamps 17 and the like for occasional display on the operation panel 12, this is not preferable since it requires extra space on the operation panel surface and installation work.

In the figure, reference numeral 18 indicates a display window of the memory counter, and a zero return push button 19 protrudes from the panel surface adjacent to this window.

The present invention solves the above-mentioned problems and was devised by focusing on the zero return push button of the memory counter that is projected on the operation panel of the tape recorder. By providing a light emitting element such as a light emitting diode and inserting this light emitting element in series with a memory switch, when the control circuit for tape running due to the operation of the memory switch is closed, this light emitting element is inserted into the head of the push button. The purpose of this is to display the memory counter-related functions at a position adjacent to the counter display window without requiring special space on the operation panel surface. The object of the present invention is to provide an operation display device that can display the following information.

This will be explained in detail below using an example shown in the drawings.

FIG. 2 shows a memory counter 20 according to the present invention. As is widely known, this counter 20 includes a pulley 21 connected to a tape drive mechanism by a belt or the like, and a drive transmitted through the rotation of this pulley. a memory switch 23 that operates when the highest digit number wheel changes from "0" to "9", and a counter frame that returns all the number wheels to zero all at once. A zero return push button 24 is provided slidably in a groove formed in the side wall. In this embodiment, the memory switch 23 consists of an electric brush that is integrally fixed to the side of the number wheel of the highest digit, and a printed circuit board that is fixed to the counter frame side corresponding to this brush. Two terminals 2 from the board
3a is extending. Of course, the memory switch 23 may be a contact point that operates when all the number wheels coincide with a predetermined position, for example, a "0" display position.

The zero return pushbutton 24 is provided with a light emitting diode 25 inside thereof, and is configured such that light emitted by the diode 25 is displayed from the top of the pushbutton 24. By the way, as a structure in which such a light emitting diode is installed inside the push button, it is possible to embed it integrally with the push button 24, or to mount the light emitting diode directly on the frame side of the counter or indirectly through a bracket member. The fixed diode may be fixed inside the push button, and the inside of the push button may be hollow, and the fixed diode may be contained inside the push button that moves up and down. It is sufficient if it is displayed from the head. Furthermore, since this type of light-emitting diode generally has a light-emitting element encapsulated in a transparent or colored transparent synthetic resin, the encapsulation body itself is molded into the shape of a rod-like push button, and the light-emitting diode itself becomes a push button. Various modifications and changes are possible, including configuring this to be joined to the zero return member main body of the counter.

However, such a memory switch 23
The light emitting diode 25 installed in the zero return push button 24 is inserted in series with the memory operation selection switch 27 as shown in FIG. /or connected to the memory play control circuit 28.

Therefore, if the rewinding operation is performed while the memory operation selection switch 27 is set to the on state, the memory switch 23 is closed and a loop of the control circuit 28 is formed. When the rewinding is automatically stopped, a current flows through the light emitting diode 25, and the head of the push button 24 lights up. This shows that the automatic stop of rewinding is caused by the memory counter.

In the above embodiment, a light emitting diode is provided inside the zero return pushbutton, but it is clear that a light emitting element such as a lamp or a neon tube may be used instead of the light emitting diode.

As described above, according to the present invention, a light emitting element is installed in the zero return push button of the memory counter, and this light emitting element is connected to the tape running control circuit in series with the memory switch. When the rewinding operation is automatically stopped by the memory switch of the memory counter, the light emitting element emits light, and the head of the zero return push button indicates that the automatic rewinding operation was stopped by the memory switch of the memory counter. If the push button lights up and rewinding stops automatically without the push button lighting up, this is not due to the function of the memory counter but to other causes such as the end detection mechanism. This has excellent practical effects in that the most effective operation display can be achieved without requiring extra space on the operation panel surface.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional memory switch operation display device, FIG. 2 is a schematic configuration diagram of a memory counter according to the present invention, and FIG. 3 is a circuit diagram thereof. 20... Memory counter, 23... Memory switch, 24... Zero return push button, 25... Light emitting diode, 27... Memory operation selection switch, 28... Control circuit.

Claims (1)

[Scope of utility model registration request] A plurality of number wheels that move in conjunction with the running of the tape, a memory switch that operates when these number wheels rotate to a predetermined display position, and a zero return push button that returns these number wheels to zero all at once. The push button includes a memory counter including a light emitting element disposed inside the push button, and the memory switch is configured to be connected to a tape running control circuit by closing a memory activation selection switch. The light emitting element is inserted in series with the memory switch, and when the tape running control circuit is closed, the light emitting element emits light to indicate the operating status of the memory switch from the head of the push button. A memory switch operation display device for a tape recorder, characterized in that: