CN2265573Y

CN2265573Y - Shared listening device for cassette recorder

Info

Publication number: CN2265573Y
Application number: CN 95227781
Authority: CN
Inventors: 刘培
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-08
Filing date: 1995-12-08
Publication date: 1997-10-22
Anticipated expiration: 2005-12-08

Abstract

The utility model relates to a shared listening device for a cassette recorder. A shared listening circuit arranged on a common cassette recorder additionally, and the listening sound effect is controlled by the mutual contact of people. The utility model is composed of the shared listening circuit formed by connecting an additional power supply, the normally open contact of a shared listening switch TQ, a resistor R, a relay J and an insulated gate field effect transistor in series, the normally closed contact of the shared listening switch TQ additionally arranged on a power circuit controlled by a starting machine key of the prime machine, and the normally open contact 1 J connected in parallel with a group of relays J on both ends of the normally closed contact. The utility model has the advantages of synchro listening control, game function and simple structure. The utility model is suitable for the cassette recorders to use.

Description

A kind of same device for tone frequencies of cassette recorder

The utility model relates to and a kind ofly installs one additional with listening a circuit on common cassette recorder, and by the same device for tone frequencies of the cassette recorder of physiognomy mutual connection touch-control system hearing effect.

Existing cassette recorder, the people is with earphone, press start key PLAY after, music promptly begins normal output to be listened to, this cassette recorder often can only be listened to separately by a people, two people can't listen to together the time simultaneously, and function singleness.

The purpose of this utility model is to overcome deficiency of the prior art and proposes a kind of by two operators' hand or touching from replacing the fuselage switch of other position, with two operators' wish control music unlatching, stop, reach control and listen to, improve sensitivity and purpose simple to operate synchronously, play the effect of game function and music to two people's two-way exchanges.

The purpose of this utility model is achieved in that the same tin of circuit that is composed in series by additional supply V2, normally opened contact, resistance R, relay J, the isolated gate FET MOS of the same switch TQ of listening constitutes, its repeat circuit links to each other with the drain electrode of isolated gate FET, establish together current potential end points b at the grid of isolated gate FET, establishing together current potential end points a with listening between switch TQ and the resistance R.The source electrode of isolated gate FET links to each other with the negative pole of additional supply, and lead of affix on original earphone cord, a termination two switch end points a or b, the other end are connected on the outside and human body contact position of earphone.Power circuit to former cassette recorder start key control improves, and promptly connects one with the normally closed contact of listening switch TQ on former circuit, and touches at this, the normally opened contact 1J of a some two ends group relay J in parallel.After pressing the start key PLAY on the sound-track engraving apparatus.Music is normally exported, if press with listening key promptly with after listening switch TQ.Disconnect the normally opened contact closure with the normally closed contact of listening switch TQ, the power circuit outage of former cassette recorder start key control, music is promptly ended, and enters same listen state this moment, can substitute the human body switch by two operators' contact and control the unlatching of music, stops; After two people's contacts, the positive voltage of additional supply passes to this person by a people's earphone, passes to the contact people again.And, promptly form path, and add positive voltage at the grid of isolated gate FET at a and b two-end-point to the earphone that contacts the people, and source electrode is a no-voltage, so additional supply all is added in two ends, grid source, so raceway groove conducting between drain-source, relay closes, the power circuit energising of former cassette recorder start key control, music output, after two people separated, raceway groove disappeared between drain-source, the relay decompression discharges, and cassette recorder quits work.

The utility model is by two operators' hand or touching from replacing the fuselage switch of other position, and with two operators' wish control music unlatching, stop, have that control is listened to synchronously, highly sensitive, operation and advantage of simple structure, in the occasion of not having outside big stereo set or band, can be for two people's galliard accompaniment, cassette recorder after the improvement has increased the musical background function that two people jump galliard, realizes that two human world emotions and music are to the two-way exchange game function.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the same tin of circuit diagram that the utility model adds on former machine.

Fig. 2 is the improvement figure of the utility model to former machine circuit figure.

Fig. 3 is the utility model output plug, jack wiring diagram.

As shown in Figure 1, the same tin of circuit that the utility model is composed in series by additional supply, with the normally opened contact, resistance R, relay J, the isolated gate FET MOS that listen switch TQ and on the power circuit of former cassette recorder start key control, setting up with the normally closed contact of listening switch TQ, and in the normally opened contact 1J of these two ends, contact group relay J in parallel formation, wherein in tin circuit, relay links to each other with the drain electrode of isolated gate FET, establish together current potential end points b at the grid of isolated gate FET, establishing together current potential end points a with listening between switch TQ and the resistance R.The source electrode of isolated gate FET links to each other with the negative pole of additional supply, is in high impedance status between the grid source because of isolated gate FET, so going back on the isolated gate FET in the parallel connection with the normally closed contact of listening switch TQ.

As shown in Figure 3, lead of affix on original earphone cord, a termination end points a or a b, the other end are connected on the outside and human body contact position of earphone, can install the conductive rubber ring additional herein for improving electric conductivity, make it to link to each other with people's ear.

As shown in Figure 2, power circuit to former cassette recorder start key control improves, promptly on former circuit one of series connection with the normally closed contact of listening switch TQ, and at the normally opened contact 1J of these two ends, contact group relay J in parallel, V1 is the fuselage power supply among the figure, after pressing the start key PLAY on the sound-track engraving apparatus, music is normally exported, if press with listening key promptly with after listening switch TQ, disconnect with the normally closed contact of listening switch TQ, the normally opened contact closure, (normally closed contact of TQ is seen Fig. 2, and normally opened contact is seen Fig. 1).The power circuit outage of former cassette recorder start key control, music is promptly ended, and enters same listen state this moment, can substitute subunit switch by two operators' contact and control the unlatching of music, stops (being a point and contacting that b is ordered among Fig. 1); After two people's contacts, the positive voltage of additional supply passes to this person by a people's earphone, the this person passes to the contact people again, and receive the contact people earphone, promptly form path at a and b two-end-point, make auxiliary voltage pass through earphone → human body (a point) → human body (b point) → earphone and constitute path, be added on the grid of isolated gate FET, this moment, source electrode was a no-voltage, and the grid source of isolated gate FET is in high impedance status, so the positive voltage of additional supply all is added in grid and source electrode two ends, make raceway groove conducting between drain-source the two poles of the earth, relay closes, the power circuit energising of former cassette recorder start key control, music output, after two people separated, raceway groove disappeared between drain-source, and the relay decompression discharges, the power circuit outage of former cassette recorder start key control, cassette recorder quits work.

Claims

1, a kind of same device for tone frequencies of cassette recorder, the same tin of circuit that is composed in series by additional supply, with the normally opened contact, resistance R, relay J, the isolated gate FET MOS that listen switch TQ and on the power circuit of former cassette recorder start key control, setting up with the normally closed contact of listening switch TQ, and, it is characterized in that in the normally opened contact 1J of these two ends, contact group relay J in parallel formation:

A, with listening in the circuit, relay links to each other with the drain electrode of isolated gate FET, establish together current potential end points b at the grid of isolated gate FET, establishing together current potential end points a with listening between switch TQ and the resistance R, the source electrode of isolated gate FET links to each other with the negative pole of additional supply, and listens the normally closed contact of switch TQ in parallel connection on the isolated gate FET together, lead of affix on original earphone cord, one termination end points a or b, the other end are connected on the outside and human body contact position of earphone

In b, the improvement power circuit to former cassette recorder start key control, one of series connection is with the normally closed contact of listening switch TQ, and at the normally opened contact 1J of these two ends, contact group relay J in parallel on former circuit.