JPS6164633U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 shows an example of the electrical configuration of an integrated circuit for a small tape recorder according to the present invention and a small tape recorder using this integrated circuit. FIG. 2 is an example of power transmission to the reel shaft of a small tape recorder using the integrated circuit for a small tape recorder according to the present invention. FIG. 3 is an example of a pinch roller/magnetic head position control mechanism for a small tape recorder using the integrated circuit for a small tape recorder according to the present invention. Figure 4 shows the pinch roller according to the present invention.
This is an example of a magnetic head position control circuit. FIG. 5 shows signal waveforms at various parts in FIG. 4. FIG. 6 is an example of a control circuit according to the present invention. 1...Integration for small tape recorders according to the present invention,
2-6...Keyboard switch, 7-11...Flip-flop for state storage, 12...Reset circuit, 1
3... Control circuit, 14... Capstan drive motor control circuit, 15... Pinch roller/magnetic head position control circuit, 16... Auto set circuit, 17... Erroneous erasure prevention circuit, 18... Electric contact, 19... Capstan drive motor, 20-23...Transistor, 2
4... Electric contact, 25... Pinch roller/magnetic head position control motor, 26... Transistor, 27,
29, 32...Switch, 28...Regeneration amplifier, 3
0... Recording amplifier, 31... Bias oscillator, 33
...Latching relay, 34-36...Transistor, 37...Erase head, 38...Magnetic head for recording/reproduction, 39...Microphone, 40...Status display unit, 41...Speaker, 50...Pulley, 51...Belt, 52...Capstan shaft , 53-54...oscillating gear, 55-5
6... Reel shaft gear, 57... Reverse direction, 58... Forward rotation direction, 59... Flywheel, 60... Cassette tape, 61... Fulcrum, 62... Lever, 63... Magnetic head, 64... Pinch roller, 65... Capstan shaft, 66... Electric contact, 67... Spring, 68...
Cam, 69...worm gear, 70...rotating roller,
75~76...monostable multivibrator, 80~
81... Monostable multivibrator.

Amendment September 27, 1980 The scope of claims for utility model registration is amended as follows.

[Claim for Utility Model Registration] A flip-flop that stores the state set by a keyboard switch by which the user specifies the operation of a small tape recorder such as recording, playback, and rewinding, and a reset circuit that resets the flip-flop. , a motor control circuit for driving the carbstan, a pinch roller and magnetic head position control circuit, an auto-set circuit that puts the small tape recorder in a specific state when the power is turned on, and an erroneous erasure prevention circuit.
In an integrated circuit for a small tape recorder, the integrated circuit has a control circuit that controls each of the circuits and also controls each circuit of the tape recorder such as a reproduction amplifier circuit, a recording amplifier circuit, a bias oscillation circuit, etc. (1) the capstan drive motor; (2) The pinch roller and magnetic head position control circuit includes a control circuit that outputs a control signal to control forward and reverse rotation of the motor; (2) a control circuit that outputs a control signal for controlling forward and reverse rotation of the motor; A control circuit that outputs a control signal that subsequently starts the capstan shaft or reel shaft drive motor. (3) a control circuit that uses a small motor, solenoid, etc. to output a control signal that causes circuits other than the pinch roller and the magnetic head control circuit to be inactive while the pinch roller and the magnetic head positioning means are in the operating state; (4) An integrated circuit for a compact tape recorder, comprising: a pinch roller having a delay circuit for delaying a signal from a magnetic head position detecting means; and a magnetic head position control circuit .

Claims (1)

[Claim for Utility Model Registration] A flip-flop that stores the state set by a keyboard switch by which the user specifies the operation of a small tape recorder such as recording, playback, and rewinding, and a reset circuit that resets the flip-flop. , a capstan drive motor control circuit, a pinch roller, a magnetic head position control circuit, an auto-set circuit for setting the small tape recorder to a specific state when the power is turned on, an erroneous erasure prevention circuit, and controlling each of the above-mentioned circuits, and a control circuit for controlling each circuit of the tape recorder, such as a reproduction amplifier circuit, a recording amplifier circuit, and a bias oscillation circuit, wherein: A control circuit that outputs control signals to control forward and reverse rotation. (2) The pinch roller and magnetic head position control circuit includes a control circuit that outputs a control signal to start the capstan shaft or reel shaft driving motor after the pinch roller and magnetic head have completed their positional movement. . (3) A control circuit that uses a small motor, solenoid, or the like to output a control signal that makes circuits other than the pinch roller and magnetic head control circuit inoperative while the pinch roller and magnetic head positioning means are in an operating state. (4) It is characterized by having at least one of the four circuits: the pinch roller, a pinch roller having a delay circuit for delaying a signal from the magnetic head position detection means, and a magnetic head position control circuit. Integrated circuit for small tape recorders.