CN2157647Y

CN2157647Y - Hand loudspeaker capable of recording and playback

Info

Publication number: CN2157647Y
Application number: CN93203381U
Authority: CN
Inventors: 李庆元; 孔径一
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-23
Filing date: 1993-02-23
Publication date: 1994-02-23
Anticipated expiration: 2003-02-23

Abstract

The utility model relates to a hand loudspeaker capable of recording and playback, which is suitable for the occasions that the content is brief and the repeated calling is needed. The hand loudspeaker capable of recording and playback is composed of a casing, a battery, a microphone, an electronic music module, an amplifier, a power amplifier, a loudspeaker, an indicator light and a function selecting switch. The hand loudspeaker capable of recording and playback is characterized in that a voice recording and playback module, a dynamic memory module, a recording and playback button are also arranged, wherein, when recording, audio signals produced at the two ends of the microphone are converted into data signals through the voice recording and playback module and are stored in the dynamic memory module through a data line; when playing, the stored data signals are taken out from the dynamic memory module and are converted into the audio signals by the voice recording and playback module through the data line. The audio signals are amplified through the power amplifier, and are played by the loudspeaker.

Description

Hand loudspeaker capable of recording and playback

The utility model relates to a kind of capable of recording and playing hand-hold type megaphone, is particularly useful for the occasion of propagandaing directed to communicate that content is brief, repeat.

At present, known hand-hold type megaphone (referring to Fig. 2), mainly be made of casing, battery (E1, E2), microphone (MIC), electronic music module (IC4), amplifier (IC1), power amplifier (IC5), indicator light (LED1) and functional select switch (S3-1, S3-2), circuit connecting relation is as follows:

Microphone a, b two ends and amplifier in IC1 2. 3. pin be connected, output IC1 1. pin links to each other with volume control potentiometer R3 through the functional select switch S3-2 contact that amplifies, the center head of R3 through capacitor C 1 and power amplifier input IC5 8. pin be connected output IC5

Pin is connected with loud speaker (SP), and IC5 1. pin links to each other with an end and the indicator light LED1 of the mains switch S1 that amplifies, and the other end of LED1 is through current-limiting resistance R1 ground connection, another termination battery E2 of S1; The power end IC4 of electronic music module Pin links to each other with battery E1 through functional select switch S3-1, and output IC4 2. pin links to each other with S3-2 music contact, the 3. pin ground connection of IC4; IC1's The equal ground connection of 10. pin of pin, IC5.

Existing hand-hold type megaphone is after energized, and the microphone sound of will propagandaing directed to communicate is converted to audio electrical signal and amplifies through amplifier, also is sound by loud speaker again, and so just having finished propagandas directed to communicate amplifies.It is little, in light weight that it has a volume, characteristic of low energy consumption and the function of propagandaing directed to communicate and amplifying and playing electronic music.But it can not be recorded, and need through being everlasting content brief and repeat propaganda directed to communicate the time, the people that propagandas directed to communicate just have to cry out same section words again and again repeatedly.

The purpose of this utility model provides a kind of capable of recording and playing hand-hold type megaphone.It has not only that volume is little, in light weight, characteristic of low energy consumption and the function of propagandaing directed to communicate and amplifying and playing electronic music, and brief the propagandaing directed to communicate of recording playback content repeatedly.

The purpose of this utility model is achieved in that it mainly is made of casing, battery, microphone, voice recording-reproducing assembly, dynamic memory, electronic music module, amplifier, power amplifier, loud speaker, indicator light and functional select switch.Voice recording-reproducing assembly and dynamic memory are connected between microphone and the amplifier by coupling circuit.With the audio electrical signal of microphone generating, be converted to data-signal by voice recording-reproducing assembly and deposit dynamic memory in, so just finished Recording Process.And then from dynamic memory, take out the data-signal that deposits in by voice recording-reproducing assembly again and be converted to audio electrical signal and send into the amplifier amplification, be reduced to sound through loud speaker, finished the playback process so again.Just reach the purpose of rerecording and resetting as long as repeat above two processes.Simultaneously, it has still kept the characteristics and the function of known hand-hold type megaphone.

Owing to adopt such scheme, make capable of recording and playing hand-hold type megaphone have that volume is little, in light weight, characteristic of low energy consumption and propagandaing directed to communicate amplifies and play on the basis of electronic music function, has increased the critical function that recording playback is repeatedly briefly propagandaed directed to communicate.

Below in conjunction with accompanying drawing the utility model is further specified:

Fig. 1 is an electrical schematic diagram of the present utility model.

Fig. 2 is the electrical schematic diagram of existing hand-held megaphone.

MIC microphone among Fig. 1, IC1 amplifier, IC2 voice recording-reproducing assembly, IC3 dynamic memory, IC4 electronic music module, IC5 power amplifier, LED1 amplify power supply indicator, LED2 recording state indicator light, R1, R2 current-limiting resistance, R3 volume control potentiometer, C1 coupling capacitance, SP loud speaker, S1 amplify mains switch, S2 recording maintained switch, S3-1, S3-2 functional select switch, E1, E2 battery, AN1 record button, AN2 player button.

As shown in Figure 1, a kind of capable of recording and playing hand-hold type megaphone of the utility model, constitute by casing, battery, microphone, electronic music module, amplifier, power amplifier, loud speaker, indicator light and functional select switch, it is characterized in that also being provided with voice recording-reproducing assembly (IC2), dynamic memory module (IC3), record button (AN1) and player button (AN2), wherein microphone a, b two ends and IC2 5., 6. pin is connected, IC2 10.～ Pin successively with IC3 1.～7., 9.～ Pin links to each other, the recording playback contact of the 8. pin connection function selector switch S3-1 of IC3, IC3's Pin ground connection; The 7. pin of IC2 connects current-limiting resistance R2, the end of another termination recording state indicator light LED2 of R2, the recording playback contact of another termination S3-1 of LED2, the 8. pin of IC2 connects the end of record button AN1, the recording playback contact of another termination S3-1 of AN1, the 9. pin of IC2 connects the end of player button AN2, the recording playback contact of another termination S3-1 of AN2, the power end of IC2 3. pin links to each other with the recording playback contact of S3-1, and the output of IC2 1. pin links to each other with the recording playback contact of functional select switch S3-2; The recording playback contact of the termination S3-1 of recording maintained switch S2, the other end of S2 is connected with battery E1 is anodal.

As shown in Figure 1, when the mains switch that amplifies (S1) was connected, (LED1) was bright for the power supply indicator that amplifies, and (S3-1 S3-2) pushes when amplifying the position, and can propaganda directed to communicate amplifies with functional select switch.(S3-1 when S3-2) pushing the music position, can play electronic music with functional select switch.(S3-1, when S3-2) pushing the recording playback position, it is bright to press record button (AN1) recording state indicator light (LED2), begins recording with functional select switch.During End of Tape, record indicator extinguishes.Just begin the last recording of resetting by player button (AN2).

(S3-1 S3-2) when the recording position, connects recording maintained switch (S2) and can keep the last recording, can not keep otherwise record, and the volume of broadcast can control with volume control potentiometer (R3) as required when functional select switch.

Main components and parts are as follows among the utility model embodiment:

IC1 operational amplifier LM324

IC2 voice recording-reproducing assembly QXM22

IC3 dynamic memory DRAM4256

IC4 electronic music module KD15

IC5 power amplifier TBA801

S3-1, S3-2 toggle switch 2 * 3D

Claims

1, a kind of capable of recording and playing hand-hold type megaphone, constitute by casing, battery, microphone, electronic music module, amplifier, power amplifier, loud speaker, indicator light and functional select switch, microphone a, b two ends and amplifier in IC1 are 2., 3. pin is connected, output IC1 1. pin links to each other with volume control potentiometer R3 through the functional select switch S3-2 contact that amplifies, the center head of R3 through capacitor C 1 and power amplifier input IC5 8. pin be connected output IC5

Pin is connected with loud speaker (SP), and IC5 1. pin links to each other with an end and the indicator light LED1 of the mains switch S1 that amplifies, and the other end of LED1 is through current-limiting resistance R1 ground connection, another termination battery E2 of S1; The power end IC4 of electronic music module

Pin is connected with battery E1 through functional select switch S3-1, and output IC4 2. pin links to each other with S3-2 music contact, the 3. pin ground connection of IC4; IC1's

The equal ground connection of 10. pin of pin, IC5, it is characterized in that also being provided with voice recording-reproducing assembly (IC2), dynamic memory module (IC3), record button (AN1) and player button (AN2), wherein a of microphone, b two ends respectively with IC2 5., 6. pin is connected, IC2 10.～ Pin successively with IC3 1.～7., 9.～

Pin links to each other, the recording playback contact of the 8. pin connection function selector switch S3-1 of IC3, IC3's

Pin ground connection; The 7. pin of IC2 connects current-limiting resistance R2, the end of another termination recording state indicator light LED2 of R2, the recording playback contact of another termination S3-1 of LED2, the 8. pin of IC2 connects the end of record button AN1, the recording playback contact of another termination S3-1 of AN1, the 9. pin of IC2 connects the end of player button AN2, the recording playback contact of another termination S3-1 of AN2, the power end of IC2 3. pin links to each other with the recording playback contact of S3-1, and the output of IC2 1. pin links to each other with the recording playback contact of functional select switch S3-2; The recording playback contact of the termination S3-1 of recording maintained switch S2, the other end of S2 is connected with battery E1 is anodal.