CN2183064Y

CN2183064Y - Microphone for karaoke

Info

Publication number: CN2183064Y
Application number: CN 93237972
Authority: CN
Inventors: 郭振民; 陈伟
Original assignee: Gaoyou Huafeng General Electronic Factory; Yangzhou Polytechnic College
Current assignee: Gaoyou Huafeng General Electronic Factory; Yangzhou Polytechnic College
Priority date: 1993-11-22
Filing date: 1993-11-22
Publication date: 1994-11-16
Anticipated expiration: 2003-11-22

Abstract

The utility model relates to a microphone for electroacoustic equipment. The utility model is composed of a microphone head, a microphone casing, a reverberation circuit, a transmitting circuit, a controlling circuit, a direct current power supply and an external connection socket. The microphone has conspicuous reverberation effect under wired or cordless working condition. The reverberation depth can be smoothly regulated between zero to the strongest reverberation. When the reverberation depth is zero, the microphone can be used as a general microphone. Under the cordless working condition, the transmitting distance is far, and can be reached by 80 meters in an open land, and can be reached by more than 30 metres in a room. The microphone is not influenced by the use direction, and has no human body inductive influence. The utility model is suitable for literary singing and household entertainment.

Description

Microphone for karaoke

The utility model relates to a kind of electroacoustic equipment microphone.

Present karaoke OK system generally is made up of independent microphone and the electrical equipment with reverberation circuit, microphone is wired and wireless two kinds, they itself do not have the reverberation function, present many electroacoustic equipments do not have Kara OK function again, want to utilize these electrical equipment to carry out karaoke and obviously can't carry out, on the market microphone with reverberation function has been arranged now, need only and cooperations such as television set, video tape recorder, no matter these electrical equipment had or not karaoke OK system originally, can carry out karaoke.But the reverberation function of this microphone does not have under wired and wireless status, and the reverberation degree of depth fixes, and bad adjusting is subjected to the influence of human body sensing bigger.

Task of the present utility model provides a kind of wireless and wiredly all have a remarkable reverberation effect, reverberation depth-adjustment, long transmission distance and do not have the Microphone for karaoke of human body induction influence.

Task of the present utility model is to realize like this, by the microphone head, the microphone housing, reverberation circuit, radiating circuit, control circuit, DC power supply, the Microphone for karaoke that external socket constitutes, in reverberation circuit, designed low pass amplifying circuit I, delay circuit, clock-pulse circuit, low pass amplifying circuit II, low pass amplifying circuit I is by ic chip 1(RC4558), resistance R 8, R9, R10, capacitor C 5, C6 constitutes, high fdrequency component in the filtering input signal, reduce to disturb and noise, delay circuit is by ic chip 2(MN3207, MN3208), resistance R 12, R13, capacitor C 9, potentiometer W1 constitutes, delay time is by the frequency decision of clock pulse, signal after delaying time from the 7th of ic chip 2, the output of 8 bipods, potentiometer W1 regulates the output balance, clock-pulse circuit is by ic chip 3(MN3102), capacitor C 8, resistance R 11 constitutes, C8, the frequency of the value decision clock pulse of R11, low pass amplifying circuit II is by ic chip 1(RC4558), resistance R 3, R4, R5, R6, capacitor C 10 constitutes, with the clock signal component in the filtering time delayed signal, the audio signal of microphone head output is divided two-way after T1 amplifies in reverberation circuit, one the tunnel through capacitor C 1 every directly, resistance R 4 is isolated the back and is delivered to radiating circuit by capacitor C 11, be called the direct sound wave signal, another road through capacitor C 2 every directly, resistance R 2 is isolated after low pass amplifying circuit I, delay circuit, clock-pulse circuit, low pass amplifying circuit II, divide two the tunnel again after forming time delayed signal, one the tunnel through capacitor C 3 every directly, after isolating, resistance R 14 sends into control circuit, through reverberation depth adjustment potentiometer 4, the generation reverb signal is mixed in resistance R 18 decay backs with the direct sound wave signal, another road through capacitor C 4 every directly, resistance R 7 is isolated after low pass amplifying circuit I, delay circuit, clock-pulse circuit, low pass amplifying circuit II, time-delay again is to form repeatedly time delayed signal.

In radiating circuit, designed Colpitts oscillation circuit, frequency multiplier, with ground wire as transmitting antenna, Colpitts oscillation circuit is by transistor T 2, capacitor C 12, C13, C14, C15, resistance R 15, R16, inductance L 1 constitutes, produce the high-frequency signal of 44MHZ～54MHZ, frequency multiplier is by transistor T 3, resistance R 17, capacitor C 17, C18 constitutes, produce the FM signal of 88MHZ～108MHZ, do not establish transmitting antenna in the circuit in addition, the utility model is with the antenna of all ground wires as the emission high-frequency signal, to increase transmitting range, eliminated the human body sensing influence to greatest extent.

In control circuit, designed the reverrberation intensity regulating circuit, function conversion circuit, bleeder circuit, the reverrberation intensity regulating circuit is by reverberation depth adjustment potentiometer 4, resistance R 18 constitutes, realize reverrberation intensity from zero to reverberation the smooth adjustment the strongest, function conversion circuit has designed off-mode, wired operating state and wireless operating state, during wired operating state, pass through function switch, be the reverberation circuit power supply, luminous tube 3 is lighted simultaneously, cut off the radiating circuit working power, reverberation circuit output signal and external socket 5 are linked, constitute the lineman and make state, during wireless operating state, pass through function switch, be reverberation circuit, the radiating circuit power supply, luminous tube 3 is lighted, and external socket can insert input signal, and input signal is through resistance R 20, R21, after the bleeder circuit decay that R22 constitutes, through capacitor C 19 every directly, resistance R 19 is isolated back the mixing with the output signal of reverberation circuit and is delivered to radiating circuit, has constituted wireless operating state.

The 1st pin of ic chip 1 is connected with the 3rd pin of ic chip 2 in the delay circuit through resistance R 8 in the low pass amplifying circuit I, it is the 7th years old, 8 bipods are through the regulating arm of potentiometer W1, capacitor C 7 is connected with resistance R 6 in the low pass amplifying circuit II, the 4th pin of ic chip 3 in the clock circuit, the 2nd pin respectively with the 6th pin of delay circuit ic chip 2, the 2nd pin connects, the 7th foot meridian capacitor C3 of low pass amplifying circuit II ic chip 1, C4, resistance R 7 is connected with the 2nd pin of ic chip 1 in the low pass amplifying circuit I, the 7th foot meridian capacitor C3 of ic chip 1 in the low pass amplifying circuit II, resistance R 14 is connected with the regulating arm of reverberation depth adjustment potentiometer in the control circuit, control circuit is through resistance R 18, the base stage of the transistor T 2 in capacitor C 11 and the Colpitts oscillation circuit is connected, and the collector electrode of its transistor T 2 is connected with the base stage of transistor T 3 in the frequency multiplier through capacitor C 16.

The utility model has realized under wired, wireless operating state significant reverberation effect being arranged all, the reverberation degree of depth can zero to reverberation the smooth adjustment between the strongest, when the reverberation degree of depth is zero, can make common microphone and use, wireless operating state long transmission distance can reach 80 meters in the open ground, indoorly surpass 30 meters, be not subjected to the influence of service orientation, the influence of no human body induction, suitable literature and art is sung and family's self-recreation.

Accompanying drawing 1 is the utility model shape assumption diagram.

Accompanying drawing 2 is the utility model electrical schematic diagram.

In the accompanying drawing: microphone head 1, microphone housing 2, luminous tube 3, reverberation depth adjustment potentiometer 4, external socket 5, function switch K1, transistor T 1, T2, T3, ic chip 1, IC2, IC3, potentiometer W1, resistance R 1-22, capacitor C 1-19, inductance L 1, power supply DC.

Further specify the utility model in conjunction with the accompanying drawings.The audio signal of microphone head 1 output divides two the tunnel on its collector electrode after transistor T 1 amplifies, one the tunnel through capacitor C 1 every directly, resistance R 1 is isolated the back and is delivered to radiating circuit as the direct sound wave signal, another road through capacitor C 2 every directly, resistance R 2 is sent into low pass amplifying circuit I ic chip 1(RC4558 after isolating) the 2nd pin, high fdrequency component in this circuit filtering input signal, reduce and disturb and noise, the signal of its output enters the ic chip 2(MN3207 of delay amplification circuit, MN3208) the 3rd pin, delay time is by the frequency decision of clock pulse, by ic chip 3(MN3102), capacitor C 8, capacitor C 8 in the clock-pulse circuit that resistance R 11 is formed, the frequency of the value decision clock pulse of resistance R 11, signal after delaying time from the 7th of ic chip 2, the output of 8 bipods, potentiometer W1 regulates the output balance, from the time delayed signal of potentiometer W1 centre cap output through capacitor C 7 every directly entering low pass amplifying circuit II, clock signal component in the filtering time delayed signal, from ic chip 1(RC4558) the 7th pin output time-delay acoustical signal, this signal is divided into two the tunnel again, one the tunnel through capacitor C 3 every directly, resistance R 14 is isolated after the generation reverb signal is mixed in reverberation depth adjustment potentiometer 4 in the control circuit and resistance R 18 decay backs with aforesaid direct sound wave signal, this signal is sent into radiating circuit when wireless operating state, another road through capacitor C 4 every directly, after isolating, resistance R 7 delivers to low pass amplifying circuit I, delay time again to form repeatedly time delayed signal, the mixing ratio that reverberation depth adjustment potentiometer 4 in the control circuit is regulated between time delayed signal and the direct sound wave signal, thus the reverberation degree of depth regulated.The reverberation sound signal enters the base stage of the transistor T 2 in the radiating circuit and comprises the Colpitts oscillation circuit of transistor T 2, produce the high-frequency signal of 44～54MHZ here, frequency of oscillation is by capacitor C 13, the value decision of inductance L 1, the output signal of transistor T 2 is coupled to the frequency multiplier that comprises transistor T 3 through capacitor C 16, produce the FM signal of 88～108MHZ, this signal is from capacitor C 17, earth point between the C18 is launched by ground wire, the utility model emission high-frequency signal does not add transmitting antenna, but the ground wire in the whole circuit as antenna, thereby increased transmitting range, eliminated the influence of human body sensing to greatest extent, in control circuit, reverberation depth adjustment potentiometer 4, resistance R 18 constitutes reverberation depth adjustment circuit, when the travelling arm of reverberation depth adjustment potentiometer 4 is in topmost, reverberation is the strongest, when being in bottom, reverberation is zero, function switch K1 finishes the switching of function, when K switch 1 is allocated to position 2, be wired operating state, this moment, the battery anode linked to each other " 0 " end through K switch 1-1 with " 2 " end, connect light-emitting diode and reverberation circuit, light-emitting diode is lighted, radiating circuit is in off state, the reverberation circuit output signal is held short circuit to " 0 " end and " 2 " through K1-2, link with an end of external connection socket 5, constituted wired operating state, when K switch 1 is allocated to position 3, be wireless operating state, at this moment, the battery anode is through K switch 1-1, " 0 " end of K1-3 links to each other with " 3 " end, connected light-emitting diode, reverberation circuit and radiating circuit, light-emitting diode is lighted, can import outer signal from external socket 5, outer signal is by resistance R 20, R21, the bleeder circuit decay that R22 constitutes after capacitor C 19 every directly, resistance R 19 is isolated, hold " 0 " end by function switch K1-2 and " 3 " communicates to mix with the output signal of reverberation circuit and delivers to radiating circuit, constituted wireless operating state, the utility model working power voltage 6V.

Claims

1, a kind of by the microphone head, the microphone housing, reverberation circuit, radiating circuit, control circuit, the Microphone for karaoke that DC power supply and external socket are formed, it is characterized in that being provided with in the reverberation circuit low pass amplifying circuit I, delay circuit, clock-pulse circuit and low pass amplifying circuit II, in radiating circuit, be provided with Colpitts oscillation circuit, frequency multiplier, with the transmitting antenna of all ground wires as high-frequency signal, be provided with the reverberation regulating circuit in the control circuit, the bleeder circuit of function conversion circuit and external input signal, the 1st pin of ic chip 1 (RC4558) ic chip 2 (MN3207 in resistance R 8 and delay circuit in the low pass amplifying circuit I, MN3208) the 3rd pin connects, it is the 7th years old, 8 bipods are through the regulating arm of potentiometer W1, capacitor C 7 is connected with resistance R 6 in the low pass amplifying circuit II, the 4th pin of ic chip 3 (MN3102) in the clock circuit, the 2nd pin respectively with the 6th pin of delay circuit ic chip 2, the 2nd pin connects, the 7th foot meridian capacitor C3 of low pass amplifying circuit II ic chip 1, C4, resistance R 7 is connected with the 2nd pin of ic chip 1 in the low pass amplifying circuit I, the 7th foot meridian capacitor C3 of ic chip 1 in the low pass amplifying circuit II, resistance R 14 is connected with the regulating arm of reverberation depth adjustment potentiometer in the control circuit, control circuit is through resistance R 18, the base stage of the transistor T 2 in capacitor C 11 and the Colpitts oscillation circuit is connected, and the collector electrode of its transistor T 2 is connected with the base stage of transistor T 3 in the frequency multiplier through capacitor C 16.

2, Microphone for karaoke according to claim 1, the audio signal that it is characterized in that 1 output of microphone head is after transistor T 1 amplifies, one road signal is delivered to control circuit through capacitor C 1, resistance R 1, and low pass amplifying circuit I, delay circuit, clock-pulse circuit, low pass amplifying circuit II are delivered to through capacitor C 2, resistance R 2 in another road.

3, Microphone for karaoke according to claim 1 and 2, it is characterized in that the time delayed signal that forms in the reverberation circuit is divided into two the tunnel, one routing capacitance C3, resistance R 14 are sent into control circuit, through reverberation depth adjustment potentiometer 4, mix with the direct sound wave signal resistance R 18 decay backs, and another road send low pass amplifying circuit I, delay circuit, clock-pulse circuit, low pass amplifying circuit II to delay time again through capacitor C 4, resistance R 7.

4, Microphone for karaoke according to claim 1 is characterized in that low pass amplifying circuit I is made of ic chip 1, resistance R 8, R9, R10, capacitor C 5, C6.

5, Microphone for karaoke according to claim 1 is characterized in that clock-pulse circuit is made of ic chip 3, capacitor C 8, resistance R 11, the frequency of the value decision clock pulse of capacitor C 8, resistance R 11.

6, Microphone for karaoke according to claim 1 is characterized in that delay circuit is made of ic chip 2, resistance R 12, R13, capacitor C 9, potentiometer W1, and delay time is by the frequency decision of clock pulse, and potentiometer W1 regulates the output balance.

7, Microphone for karaoke according to claim 1 is characterized in that low pass amplifying circuit II is made of ic chip 1, resistance R 3, R4, R5, R6, capacitor C 10.

8, Microphone for karaoke according to claim 1 is characterized in that the reverberation regulating circuit is made of reverberation depth adjustment potentiometer 4, resistance R 18, and reverberation depth adjustment potentiometer 4 is fixed on the microphone housing.

9, Microphone for karaoke according to claim 1, it is characterized in that the bleeder circuit in the control circuit is made of resistance R 20, R21, R22, external input signal is decayed after capacitor C 19 is delivered to radiating circuit by function switch K1 every straight, resistance R 19 after isolating through bleeder circuit.