CN2178033Y - Memory type megaphone - Google Patents

Abstract

The utility model relates to a multifunctional megaphone which can directly call, play music, record and replay. The multifunctional megaphone comprises a power supply, a voltage stabilizer, a microphone circuit, a music circuit, an audio frequency amplifier, a control circuit, etc. Especially, a solid recorder composed of a language processor, a dynamic memory, a voltage amplifier, a filter, a power amplifier, etc. is also assembled in the internal structure of the megaphone. The input terminal of the solid recorder is connected with the microphone circuit, and the output terminal is connected with the input terminal of the audio frequency amplifier. The microphone circuit is also connected with the input terminal of the audio frequency amplifier through another path without passing through the recorder. With the memory type megaphone, each function can be arbitrarily selected. The utility model has the advantage of convenient carrying, and is suitable for the occasions that the repeated times are frequent and the propaganda content is single.

Description

Memory type megaphone

The utility model is a kind of portable multi-function megaphone, belongs to electronic technology field.

Existing commercially available megaphone can only the playback while propagandaing directed to communicate, and does not have language to store and playback, repeat continually to propaganda directed to communicate not only make the population dry tongue dry, shout oneself hoarse, also often because of the dull people's agitation that makes.

The utility model purpose provides a kind ofly both can directly propaganda directed to communicate or put the music on, again the multi-functional megaphone that can record and reset.

The utility model memory-type megaphone comprises power supply, pressurizer, microphone circuit, music circuit, audio frequency expander and control circuit etc., and particularly going back assembly in the megaphone internal structure has by language processor (IC ₆), dynamic container (IC ₄, IC ₅), voltage amplifier and filter (IC ₇) and power amplifier (IC ₈) waiting the solid recorder of being formed, its input and microphone circuit join, and its output and audio frequency expander input join, and microphone circuit also joins with audio frequency expander input without recorder with another road.

Use this memory-type megaphone, put pass propaganda directed to communicate in, language processor can carry out audio signal analog-to-digital conversion and deposit stochastic and dynamic container DRAM in.As long as press playback button, just language processor reading number signal from DRAM audio signal restored and be added to the expander input through circuit such as digital-to-analogue conversion, signal amplification, filtering, thereby realize the playback of propagandaing directed to communicate.Only otherwise cut off the electricity supply, the signal that has deposited among the DRAM just can not disappear, thereby can reset repeatedly.In case when propagandaing directed to communicate as fresh content again, the signal that had before deposited in is then erased voluntarily and is noted new signal, need heavily not cry out in order to when needing reset.

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

Fig. 1 is a structured flowchart of the present utility model;

Fig. 2 is a circuit diagram of the present utility model;

Fig. 3 is the three-dimensional diagrammatic sketch of the utility model product.

As shown in Figure 2: in the solid recorder by (IC ₄), (IC ₅), (IC ₆), (IC ₇), (IC ₈), integrated circuit and C ₁₃～C ₂₂Capacitor, R ₈～R ₂₀Resistance, inductance L, LED, MIC and record button AN ₁, playback button AN ₂Deng, (IC ₄) and (IC ₅) be two dynamic containers of DRAM, with identical exit join (CAS).Meet (IC again ₆) (select CAS ₁And CAS ₂) and with (IC ₆) (YYH40) the corresponding function end of language processor dock one by one.Language processor (IC ₆), the F of YYH4D ₀, F ₁Termination inductance L, capacitor C ₁₃, C ₁₄, R ₈With C ₁₅Back one termination (IC in parallel ₆) recording trigger end REC, another termination K _2-2The player button switch AN one end (IC that joins ₆) playback trigger end PLAY, another termination K _2-1, PR is (IC ₆) recording playback state end, current-limiting resistance R joins ₁₈And LED, indicate as the recording playback state.AU1 is (IC ₆) signal input part, meet 1/4LM324(IC ₇) output (14 pin), 1/4LM324 and peripheral cell are formed the backward crossover stream amplifier, and end of oppisite phase (13 pin) is by input resistance R ₂₁Meet C ₁₂M1C.The homophase termination is by R ₁₀And R ₁₁The 1/2V that the voltage divider of forming forms _DDVoltage is setovered.Meet negative feedback resistor R between inverting input (13 pin) and the output (14 pin) ₉AU0 is (IC ₆) audio signal output end, by coupling capacitance C ₁₆Receive by 2/4LM324(IC ₇), C ₁₇～C ₂₀Electric capacity, R ₁₂～R ₁₆The filter circuit that resistance is formed, audio signal is from the output of LM324 the 7th pin, through C ₂₁, R ₁₉With R ₂₀Voltage divider is received amplifier (IC ₈), TDA7050 input amplifying signal is from (IC ₈) (7 pin) through C ₂₂, R ₂₁Meet W; The audio frequency expander is by (IC ₁) power integrated circuit TBA810 and C ₂～C ₇Capacitor, R ₄～R ₇Resistance is formed.(IC ₁) signal input part connect sliding end in the middle of the W, output is with C ₇, R ₇Series connection back ground connection and C ₆The back ground connection of connecting with loud speaker.

Drive when first Curtain ring 12 is moved to the left on the curtain rod 11, cloth curtain 15 is closed.Simultaneously, first Curtain ring 12 drives screen window curtain 14 on the curtain rod 10, moves right, and opens screen window curtain 14.During motor 4 counter-rotatings, screen window curtain 14 closes, and cloth curtain 15 is opened.

In the foregoing description, also can on the Curtain ring 12 of curtain rod 11, only hang half cloth curtain 15(as shown in Figure 3), and second half cloth curtain is hung on the Curtain ring 12 on the curtain rod 10.First Curtain ring 12 of cloth curtain 15 also just becomes first Curtain ring 12 of screen window curtain 14 on the curtain rod 10 like this, when cloth curtain 15 from left and right sides both direction when the centre closes up, screen window curtain 14 retracts half; And when motor 4 counter-rotatings, cloth curtain 15 is when open both sides, and screen window curtain 14 is all pulled on.Certainly curtain rod also can only be provided with one, is used to hang cloth curtain 15.When two root window curtain rods are set, the Curtain ring 12 of the screen window curtain 14 on the curtain rod 10 can also not fixedlyed connected with belt 9, make screen window curtain 14 use hand control, or open never.No matter how to change, all very convenient.

In the foregoing description, the model of motor 4, the shape of bearing support 1,2, the model of belt pulley 5,7 and belt 9 etc. all can change.Belt 9 also can be enclosed within 12 li of a part of Curtain rings, to control the sagging of belt 9.Other also can be equipped with the remote control of motor 4 and infrared facility etc., but in general structure is simple more, and product is practical more.

Claims (2)

1, a kind of memory-type megaphone, comprise power supply, pressurizer, microphone circuit, music circuit, audio frequency expander and control circuit etc., it is characterized in that: also assembly has solid recorder in the megaphone internal structure, its input and microphone circuit join, its output and audio frequency expander input join, and microphone circuit also joins with audio frequency expander input without recorder with another road.

2,, it is characterized in that described solid recorder is by language processor, dynamically institutes such as container, voltage amplifier, filter and power amplifier form according to the memory-type megaphone of claim 1.

Images