JPH01189057A - Cassette tape recorder - Google Patents

Abstract

PURPOSE:To quickly listen to recorded conversation contents under the state of Cue and to promote the using efficiency by setting a motor speed as >=five times the speed of a reproducing tape at the time of REW. CONSTITUTION:At the time of Cue, switches S1 and S2 are turned on, and a speed control circuit is electrified with a current settled by a resistor R2. The resistor R2 is settled to meet a speed to understand the conversation recorded on the tape at this speed under the Cue state, thus enabling the quick listening. Then, at the time of Rev, the switches S1 and S3 are turned on, and a current settled by the resistor R3 is fed to the speed control circuit. The resistor R3 is settled as such a speed of Rev as >= five times as fast as the reproducing tape speed, so as to carry out Rev.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to motor speed control of cassette tape recorders, particularly microcassette tape recorders.

BACKGROUND OF THE INVENTION A wide variety of micro cassette tape recorders have been developed for use in recording and playing back conversations.

An example of motor speed control of a conventional micro cassette tape recorder will be described below with reference to the drawings.

FIG. 2 shows a circuit block diagram of a conventional micro cassette tape recorder.

In Figure 2, 1 is a playback head, 2 is a playback equalizer amplifier, 3 is a volume adjustment volume, 4 is an output amplifier,
5 is a speaker, 6 is a DC motor.

7 is a governor circuit block for motor control, 8 is a power supply, R
1 is a resistor that makes up the governor circuit, R2 is a resistor that supplies current to the speed control block of the governor circuit. .

This is a high-speed operation switch that is turned ON during fast-forward playback (Cue) and 7-reverse playback (Rev).

The operation of the circuit block configured as described above will be described below.

When the regeneration operation switch S is turned on and in the regeneration state, when the Oue/Rev button is pressed and the high speed switch S2 is turned on, current is supplied to the speed control circuit of the governor circuit 7 through the resistor R2. is,
Mokuro rotates at a speed several times faster than the playback tape speed.

Problems to be Solved by the Invention However, with the above configuration, the tape speed in the cue state was so fast that it was almost impossible to understand the contents of the conversation recorded on the tape. Therefore, in order to enable fast listening, an independent fast listening switch and circuit have been added.

In view of the above-mentioned problems, the present invention has been developed by setting a motor speed that enables fast listening and understanding of the conversation recorded on the tape in the Cuθ state, and increasing the motor speed to several times the same playback speed as before in the Rev state. To provide a cassette tape recorder with improved usability.

Means for Solving the Problems In order to solve the above problems, the cassette tape recorder of the present invention includes an FF switch, a REW switch, an FF speed setting resistor, a REV speed setting resistor,
When operating the F switch and playback switch, the motor speed is set to allow fast listening using the FF speed setting resistor, and when operating the REW switch and playback switch, the motor speed is configured to be 5 times or more compared to the playback tape speed. It is characterized by:

Operation According to the above-described configuration, the present invention applies current to the motor speed control of the governor control block from independently provided circuits at the time of Cue and Rev, so that the content recorded on the tape can be fully understood at Cu0. The speed increases, allowing for fast listening.

EMBODIMENT OF THE INVENTION Hereinafter, a microcassette according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a circuit block diagram of a microcassette tape recorder according to a first embodiment of the present invention. In FIG. 1, 1 is a playback head, 2 is a playback equalizer amplifier, and 3 is a volume adjustment volume.

4 is an output amplifier, 5 is a speaker, and 6 is a DC motor.

γ is the governor circuit for motor control, 8 is the power supply + RI is the resistor for the governor circuit, R2 is the resistor for supplying the entire current to the speed control block of the governor circuit when FF or Cu0 is on + R5 is the speed control of the governor circuit when REW or Rev A resistor for supplying current to the block, 31 is a switch that is turned on during playback, S2 is a switch that is turned on when FF or Cu0, Ss is REV or Re
This is a switch that turns on at v.

The operation of the micro cassette tape recorder configured as described above will be explained with reference to FIG.

When the micro-capacity tape recorder fu, cue is activated, the switches s, , s2 are turned on, and a current set by the resistor R2 flows through the speed control circuit. This resistor R2 is set at a speed that is fast enough to understand the conversation recorded on the tape in the cue state, making it possible to listen quickly. Next, at the time of Rev, switch S,...
S5 is turned on, and the current set by resistor R3 is supplied to the speed control circuit. This resistance R5
Since the speed at the time of Rev is set to several times the reproduction tape speed, the Rev is performed at the same speed as the conventional circuit shown in FIG.

Effects of the Invention As described above, the present invention provides a switch for both FF and Cue, a switch for Rev and RevK, and a switch for FF and Cue.
By providing speed setting resistors RKW and Rev, it is possible to perform fast listening without installing a dedicated switch or circuit when Cu0 is 7--7'v.
-y-da can be realized.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of a microcassette tape recorder according to an embodiment of the present invention, and FIG. 2 is a circuit block diagram of a conventional tape recorder. S2...Switch used for FF and Cue, S
3...Switch for both REW and Rev, R
2... Resistor for speed setting when FF and H cue, R5... Resistor for speed setting when REW and H R67.

Claims (1)

[Claims] A first high-speed operation switch that is used for fast-forward and fast-forward playback, a second high-speed operation switch that is also used for rewind and rewind playback, a playback operation switch, and a motor speed for setting fast-forward and fast-forward playback. and a second resistor for setting the motor speed for rewinding and rewinding playback. The first resistor is selected so as to set the motor speed at a speed that allows the content of the conversation to be understood, and the second
A cassette tape recorder, characterized in that the second resistor is set so that in a rewind playback state caused by the high-speed operation switch and the playback operation switch, the motor speed is five times or more during playback.