JPS587471Y2 - tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a tape recorder, and particularly in a tape recorder in which the recording mode is configured by operating a recording operation button and then operating a playback operation button.

Generally, in a cassette tape recorder, the recording/playback selector switch is switched to the recording side by operating the recording operation button, and then the playback operation button is operated, and the accompanying sliding of the sliding board causes the motor and amplifier to be switched on. The circuit is configured to supply electrical current.

In a tape recorder configured in this manner, when the motor is started, an extremely large transient current flows through the motor circuit such as the electronic governor, causing the power supply voltage to fluctuate, and as a result, noise is recorded on the magnetic tape.

Furthermore, since the rise time of the electric motor is longer than the rise time of the amplifier, the signal will be recorded at a tape speed different from the specified speed while the motor is rotating at a constant speed.

Signals and noise recorded under such conditions cause extremely unpleasant feelings to listeners when played back.

In order to improve the above-mentioned points, conventional methods have been used to keep the electric motor that drives the capstan in constant rotation even when the tape recorder is stopped by turning on the power switch, or to install a delay circuit in the amplifier to keep the electric motor that drives the capstan in constant rotation. A method has been adopted in which the open end spanner is kept in an inoperative state at 1, in which the width of the open end width is kept rotating at a constant speed.

However, in the former method, the motor is constantly rotating, which not only wastes power but also shortens the life of the motor.The latter method requires a separate switching circuit and delay circuit. This has the disadvantage that the number of components constituting the circuit increases and the cost increases.

The present invention aims to provide a device that eliminates such drawbacks, and will be described in detail below with reference to the drawings.

In the drawing, 1 is a motor, 2 is a switch that supplies current to the motor 1 when the switch is closed, and 3 is a control board that is biased in the direction of arrow A by a swing ring 4, and is used for fast forwarding, rewinding, and recording operations. When the button is operated, it is displaced by operation pieces (not shown) provided for each phase, and has the effect of closing the switch 2.

Further, when the playback operation button is operated, the sliding board 5 is displaced in the direction of arrow B by the operation piece of the operation button, and the control plate 3 is also displaced in the direction of arrow B accordingly, and the switch 2 Close it.

The present invention is constructed as described above, and its operation will be explained next.

When a quick forward or rewind operation is performed, the control plate 3 moves in the direction of arrow B against the biasing force of the spring 4, as shown in FIG.
The displacement causes the switch 2 to close.

As a result, current is supplied to the electric motor 1 through the switch 2, and as the electric motor 1 rotates, the drive mechanism is switched to the fast forward or rewind state, and the data recorder is placed in the fast forward or rewind state.

Next, when the regeneration operation button is operated, the sliding board 5 is made to slide in the direction of arrow B as shown in FIG.
Close.

As a result, the electric motor 1 rotates, and the drive mechanism, amplifier, etc. are put into the playback state, and the tape recorder is put into the playback state.

To explain the recording operation, first, when the recording operation button is operated, the recording/playback switch (not shown) is switched from the playback side to the recording side, and at the same time, the control board 3 is displaced in the direction of arrow B. When prompted, the switch 2 is closed as shown in FIG.

Therefore, when this recording operation button is operated, the electric motor is energized and starts rotating.Then, when the playback operation button is operated, the sliding board 5 is displaced in the direction of arrow B, and the recording state of the tape recorder is established. be done.

As explained above, the present invention provides a tape recorder in which the recording state is configured by operating the recording operation button and then operating the playback operation button. Before operation, the electric motor is energized to start the motor, so when the sliding board slides with the operation of the playback operation button and the magnetic head comes into contact with the magnetic tape, the electric motor is already at a constant speed. The magnetic tape is in a rotating state, and noise due to voltage fluctuations caused by starting the electric motor is not recorded on the magnetic tape, and furthermore, signals are not recorded at a tape speed different from the specified speed.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 shows the device in a stopped state, Fig. 2 shows a state in which the fast forward, rewind, or recording operation button is operated, and Fig. 3 shows a state in which the playback operation button is operated. . Explanation of main drawing numbers, 1...Electric motor, 2...
- Switch, 3...control board, 5...sliding board.

Claims (1)

[Scope of utility model registration request] In a tape recorder in which a recording state is configured by operating a recording operation button and then a playback operation button, the tape is displaced by each operation piece during fast-forwarding and rewinding operations, and by a sliding board during playback operations. The device is composed of a control board and a switch that is closed when the control board is displaced to supply current to the electric motor, and the switch is closed by displacing the control board when the recording operation button is operated. A tape recorder featuring