JPS6025699Y2 - Tape recorder with copy function - Google Patents

Description

[Detailed description of the invention] This invention relates to a tape recorder with a copying function that can copy records from a recorded cassette to another cassette. This allows a tape recorder to have a copying function while retaining its circuit configuration.

In the same case, there is a first cassette mounting section for playback only and a second cassette mounting section for normal recording and playback.
A cheap recorder has been proposed which has a copying function that allows signals reproduced in a cassette mounting section to be recorded on a cassette mounted in a second cassette mounting section.

Normally, when considering this type of tape recorder, the first cassette mounting section is used only for playback, so the first cassette mounting section is equipped with an amplifier for playback only, and the second cassette mounting section is used for signal and playback as usual. It is common to provide a recording/reproducing amplifier that can switch to

The purpose of this invention is to have a copying function that allows copying to be performed using only a normal recording/playback amplifier attached to the second cassette loading section, and also allows it to be used as a tape recorder with normal recording/playback functions. Provide tape recorders.

In this invention, first and second changeover switches are provided on the input and output sides of an equalizer amplifier that constitutes a normal recording/reproduction amplifier, and the first changeover switch switches between the copying state and the normal state. When the first changeover switch at the waist selects the playback head of the first cassette installation part so that the playback head installed in the installation part is switched between the normal side and the second changeover switch changes the equalizer circuit. The second changeover switch selects the playback equalizer and operates the equalizer amplifier as a playback amplifier, and when the first changeover switch selects the normal side, the second changeover switch selects the playback and recording equalizer and operates the recording/playback switch side. With this configuration, a common equalizer amplifier can be used for copying, normal recording, and reproduction.

One embodiment will be described in detail below with reference to the drawings.

The figure shows an embodiment of a tape recorder having a copying function according to this invention.

In the figure, reference numeral 1 indicates a first cassette mounting section for reproduction only, and stone tool 2 indicates a second cassette mounting section for normal recording and reproduction.

A read-only head 3 is mounted on the first cassette mounting section 1, and a recording/reproducing head 4 is mounted on the second cassette mounting section 2.

5 indicates an erase head. On the other hand, 6 is an equalizer amplifier, 7
8 is a preamplifier, 8 is a low frequency amplifier, and 9 is a speaker, which have the same configuration as that provided in a normal tape recorder.

In this invention, first and second changeover switches 10a are provided on the input and output sides of the equalizer amplifier 6.

10b.

The first changeover switch 10a is switched between a state in which the read-only head 3 mounted on the first cassette mounting section 1 is selected and a normal state.

That is, the read-only head 3 is connected to the fixed contact C of the first changeover switch 10a, and the movable contact of the first recording/reproduction changeover switch lla is connected to the other fixed contact N.

In a normal tape recorder, the movable contact of the first recording/playback switch 11a is directly connected to the input of the equalizer amplifier 6, but in this invention, the movable contact of the first record/playback switch 11a is
a first changeover switch 10 between the equalizer amplifier 6 and the equalizer amplifier 6.
A is inserted so that the reproduction-only head 3 can be switched between a state in which it is selected and a normal state.

On the other hand, the second changeover switch 10b is the first changeover switch 10a.
When the first selector switch 10a selects the reproduction-only head 3, a part of the output of the equalizer amplifier 6 is fed back to the input side of the equalizer amplifier 6 through the reproduction equalizer circuit 12.

Further, when the first changeover switch 10a selects the normal side, the second changeover switch 10b also selects the normal side.

That is, one end of the reproduction equalizer 12 is connected to the fixed contact C of the second changeover switch 10b, and the third one is connected to the other fixed contact N.
The movable contact of the recording/reproduction changeover switch 11b is connected.

One end of the reproduction equalizer 12 is connected to one fixed contact P of the third recording/reproduction changeover switch llb, and one end of the recording equalizer 13 is connected to the other fixed contact R.

The output of the equalizer amplifier 6 is amplified to a predetermined level by a preamplifier 7, which is also supplied with a preamplifier 7, and then a part of it is sent to a speaker 9, where it is amplified by a low frequency amplifier 8, and another part is amplified by a preamplifier 7. is a recording signal path 17 including a high frequency emphasis circuit 14
is supplied to one fixed contact P of the second recording/reproduction changeover switch llc.

One end of the recording/reproducing head 4 is connected to this fixed contact P, and the movable contact of the switch 11c is grounded.

The other end of the recording/reproducing head 4 is a second recording/reproducing selector switch l.
lc and the fixed contact R of the first recording/reproduction switching switch lla,
! :Connected to P.

For example, a microphone 15 is connected as a recording signal source to the other fixed contact R of the first recording/reproduction changeover switch lla.

Note that 16 is an AC bias source. According to the above configuration, when the first and second changeover switches 10a and 10b are connected to the fixed contact C, the reproduction-only head 3 is connected to the equalizer amplifier 6, and the signal reproduced by the reproduction-only head 3 is The signal is supplied to an equalizer amplifier 6.

At this time, a part of the output of the equalizer amplifier 6 is fed back to the input side of the equalizer amplifier 6 through the reproduction equalizer 12 by the second changeover switch 10b.

Therefore, the equalizer amplifier works as a regenerative amplifier, and the signal reproduced by the reproducing head 3 is equivalently amplified by the equalizer amplifier 6, and its output is supplied to the preamplifier 7.
The output of the preamplifier 7 is supplied through the high frequency emphasis circuit 14 to the fixed contact P of the second recording/reproduction changeover switch 11C.

At this time, the recording/reproduction changeover switches 11a, 11b, 11c
are in rolling contact with the recording side R in conjunction with each other.

Therefore, the other end of the recording/reproducing head 4 is grounded through the movable contact of the switch 11C.

Eventually, the signal reproduced from the read-only head 3 is supplied to the recording/reproducing head 4, and the signal is recorded on the cassette mounted in the second cassette mounting section 2 and copied.

On the other hand, when the first and second changeover switches 10a and 10b are in contact with the fixed contact N, the input of the equalizer amplifier 6 is input from the reproduction signal of the recording/reproduction head 4 or from the microphone 1.
5 signals are supplied.

That is, the recording/reproduction changeover switches lla to 11c are set to the reproduction side P.
If the signal is connected to the input of the equalizer amplifier 6, the reproduction signal of the recording/reproduction head 4 is supplied to the input of the equalizer amplifier 6. At this time, the reproduction equalizer 12 is connected to the equalizer amplifier 6, and the equalizer amplifier 6 operates as a reproduction amplifier. Playback sound can be emitted.

Further, when the recording/reproducing changeover switches 11a to 11c are switched to the recording side R, the microphone 15 is connected to the input of the equalizer amplifier 6, and the output of the preamplifier 7 is connected to the recording/reproducing head 4.
is supplied and recorded.

As explained above, according to this invention, the equalizer amplifier 6 and the preamplifier 7, which are provided in a normal tape recorder,
In addition to the low frequency amplifier 8, the first and second changeover switches 10a
, 10b, the electrical circuit of a tape recorder having a copying function can be constructed, and the electrical circuit can be constructed simply.

Therefore, a tape recorder with a copying function can be manufactured at low cost.

[Brief explanation of the drawing]

The figure is a connection diagram showing an embodiment of this invention. 1: First cassette mounting section for playback only, 2: Second cassette mounting section for recording and playback, 3: Head for playback only, 4: Recording/playback head, 6: Equalizer amplifier, 10a: First changeover switch, 10b: Second cassette mounting section. 2-way switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A. A first cassette mounting section for playback only; B. A second cassette mounting section capable of recording and playback; C. A playback-only head provided on the first cassette mounting section; D. 2. A recording/reproducing head provided on the cassette mounting section; E; a first recording/reproducing selector switch for selectively extracting either the reproduction signal of the recording/reproducing head or the signal to be recorded given from the recording signal source; In conjunction with the first recording/reproducing selector switch, when the first recording/reproducing selector switch takes out the reproduced signal from the recording/reproducing head, the terminal on the side to which the signal to be recorded and the AC bias signal applied to the recording/reproducing head are applied is grounded. a second recording/reproducing selector switch that connects the other end of the recording/reproducing head to a common potential when the first recording/reproducing selector switch selects a recording signal source; The movable contact is connected to the recording equalizer circuit with the first recording/reproducing selector switch in conjunction with the recording/reproducing selector switch selecting the recording signal source and the first recording/reproducing selector switch selecting the recording/reproducing head. a third recording/reproducing selector switch whose movable contact selects an equalizer for reproduction; a first selector switch that selects and applies the signal to the input terminal of the equalizer amplifier; and (1) the first selector switch provided on the output side of the equalizer amplifier selects the reproduction signal of the reproduction-only head provided in the first cassette mounting section; The output terminal of the equalizer amplifier is connected to the equalizer circuit for reproduction in the state, and the output terminal of the equalizer amplifier is a second changeover switch connected to the movable contact of the third reproduction changeover switch; J an amplifier that amplifies the output of the equalizer amplifier to drive a speaker; A tape recorder that has a recording signal path that provides recording signals to the head and a copying function that prevents the recording from occurring.