CN1812660B

CN1812660B - Hand-free double-directional loudspeaker for receiver of small telephone and power amplification and control circuit thereof

Info

Publication number: CN1812660B
Application number: CN 200510136514
Authority: CN
Inventors: 颜怀伟; 颜怀玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-29
Filing date: 2005-12-29
Publication date: 2012-04-25
Anticipated expiration: 2025-12-29
Also published as: CN1812660A

Abstract

A two-way loudspeaker being used on micro telephone set and being set with hand free receiver is composed of loudspeaker and its audio control switch, stopping and audio output capacitor, diode, power amplifier tube with its collector and emitter as well as base resistor, input control switch of audio signal and input capacitor of audio signal .It features that the mode of said loudspeaker or receiver can be switched over freely.

Description

Hand-free double-directional loudspeaker for receiver of small telephone and power amplifier thereof and control circuit

Because of the telephone set of the convenience of telephone set hand-free function, production and marketing manufacturer production and marketing at present all is with hand-free function basically, simultaneously, be receiver for different needs such as maintain secrecy must keep the sounding components and parts again.Traditional hand-free function mainly is to realize with corresponding power driving amplifier by installing sounding components and parts loud speaker additional; This has just increased loud speaker and weight thereof and its shared area and volume inevitably; Equally also make machine volume, weight, reliability (true and experience be proof repeatedly all: under the identical prerequisite of other condition, failure rate often always becomes high-positive correlation with the number of component number) and design and the corresponding increase of manufacturing cost inevitably with difficulty; Especially in the face of the development and the consumer market demand general trend of more and more miniaturization, ultra-thinization, ultralightization, then more demonstrate most important property such as its market competitiveness height.Receiver all is the sounding components and parts that impedance is very high, power is very little generally for loud speaker; Therefore it is difficult to replace loud speaker and function thereof; And very big because of the impedance height with the D.C. resistance that line carefully makes its coil, add because of high impedance and make power output very low; These factors add makes its power consumption and heating also just inevitable equally very big together, so its energy utilization efficiency is very low, especially for widely-used, that quantity is extremely huge mobile phone and other audio communication equipment; Energy utilization efficiency is low just to be meaned must strengthen and transmits and receives power, and this just increases amount of electromagnetic radiation, the particularly electromagnetic radiation intensity bigger to human harm inevitably; There are a kind of wide-spread and the what is called of using to replace the receiver of nearly body to reach reducing IVR equipment to comprise that mobile phone is amount of radiation and the intensity of mobile phone and to the extent of injury of human body with ear (plug) machine; Actually this is not so; This way only can be strengthened but not weaken electromagnetic pollution and the harm to human body and surrounding enviroment; Because connect earphone electric wire and earphone voice coil loudspeaker voice coil winding resistance and between them, comprise and this machine between distributed capacitance (amount) between formed mutually one and/or a plurality of newly be equivalent to the capacitance-resistance coupling and with the electromagnetic wave repeat transmitted and the receiver of induction type; Promptly this moment earphone and on line thereof to have served as antenna and the scope more much longer than airborne antenna, that lay of strengthening propagating electromagnetic radiation much also wide; The scope and the intensity of electromagnetic radiation has just been strengthened in the stack of these factors greatly, and the harm nature is just wider more greatly than nearly body earphone; Also have a kind of same wide-spread with use even be exactly to increase so-called radiation proof pad pasting to reach the electromagnetic radiation and harm purpose that weakens audio communication equipment such as mobile phone widely than increasing earphone; This also is a kind of real erroneous tendancy that can realize that is difficult in fact; Because detecting, many authoritys fact proved that most so-called radiation proof pad pastings or other so-called protection film basically do not possess radiation protection ability, seldom even at all can not alleviate any radiation and energy thereof; Even if very can effectively alleviate radiation and harm even so, also transmit and receive signal strength signal intensity with sacrifice is cost; Because can alleviate the means of radiation intensity mainly is nothing but shielding electromagnetic wave; This just must cause transmitting and receiving power with increasing is that cost is offset diaphragm to shielding electromagnetic waves; The amount of electromagnetic radiation and the intensity of can't help consuming energy more and also can positive correlation ground increasing human body because of the increase of amount of electromagnetic radiation and intensity are the extent of injury; Also the increase because of power is also significantly shortened the time that battery life significantly shortens, use the back of at every turn charging; Even if reduce emission and received power to reduce electromagnetic hazard and pollution and battery consumption to improve directivity (the radio wave directivity is very strong); But this just makes that wireless audio communication device orientation property is extremely strong; Speech quality such as sound suddenly big or suddenly small, smudgy, intermittent in addition the conversation fault as repeatedly the broken string etc. functional reliability and other performance are greatly reduced, solution remain add high-power, so its harmful consequences is basic identical; And these factors also all can have a strong impact on the product market competition ability increases the increase (battery of mobile phone is generally all more expensive, tens of at least even up to a hundred yuans) of scrapping the environmental pollution accelerating etc. to produce and use cost because of battery with serious; Increase loud speaker and can effectively reduce the electromagnetic radiation and the harm of and surrounding enviroment next to the shin, but have aforesaid such as increasing not enough problems such as components and parts and volume thereof, area, weight, cost to human body because of answering to die with respect to the remote-wireless that receiver is sayed.Obviously; Innovation sounding components and parts that if can the low radiation hazard of the confidentiality of receiver and loud speaker be combined and be equipped with innovation and can (be prone to) control and drive power amplifier; Then it can not only effectively overcome above-mentioned prior art and Products in Series shortcoming, and its serial main advantages is that advantages such as the market share all are conspicuous all will finally be embodied in the market competitiveness especially.

Total be exactly the present invention for a series of problems that solve prior art and product design, from hand-free double-directional loudspeaker for receiver of small telephone and the power amplifier and the control circuit of one goal of the invention, existing with principle, scheme and major advantage continue to introduce as after.The present invention directly utilizes receiver and the position that is had thereof, volume, area, weight with it; And get rid of and decide circle and vibrating diaphragm and iron core, change so that the vibrating diaphragm of direct sounding is integrated respectively but wire circle seldom is moving-coil and strong magnetic permanent-magnet alloy replaces, with change receiver lean on the superfine number of turns in line footpath a lot of and resistance is big, power consumption and heat production are all more decide circle generate an electromagnetic field earlier and magnetize iron core, the indirect sounding of vibrating diaphragm is inhaled, put to the suction, the thrust that are produced by the iron core after the magnetization again operation principle and pattern; Big and the little tonequality of integrated distortion, the number of turns few and easy increase line higher with sensitivity more true to nature is directly so resistance energy consumption and heating are littler because of the moving-coil space; But it can bear and export very big audio power; Not only solve receiver and decided serious distortion even hoarse unpleasant to hear all difficult problems such as serious noise that circle is little such as power, energy consumption is high, the easy distortion of sound causes because of the vibrating membrane space is extremely limited when especially sound is big; Also magnetic material just can obtain powerful permanent magnetic because of the superpower magnetic that adopts strong magnetic permanent-magnet alloy and have only needs seldom with same powerful magnetic reserve capability; Make product of the present invention can extremely easily do very for a short time, very gently, very thin but its tonequality, power and sensitivity is very excellent; Thereby small-sized, ultra-thin, the ultralight that has solved that existing product needs to be resolved hurrily, a high-power and serial difficult problem such as high tone quality, high sensitivity; Be equipped with controlled (convenience) control power driving circuit that is prone to again, just satisfactorily realized the present invention and goal of the invention thereof comprehensively from a total inventive concept.

Accompanying drawing and operation principle and advantage explanation:

Contrast accompanying drawing: Y is a loud speaker; V is the magnet of Y; Q ₁, Q ₂And Q ₃Be three moving (sound) independent of each other circles of Y, wherein: Q ₁For interior type moving-coil (is called for short inner ring, Q ₂And Q ₃Similar abbreviation), B is for reinforcing Q ₁And specially designed backplane level, Q ₂Be centre circle, Q ₃Be the outer ring; X is Q ₁And Q ₂The hollow magnetic pole; Z is that the vibrating membrane of Y is a sounding body; P is the fixed support of the Z Q that holds concurrently ₃Magnetic pole; D is a diode; J is a power tube, and c is that output (current collection) utmost point of J, base stage, the e that b is J are the emitter of J; K ₁Be audio signal input control switch, K ₁', K ₁" be respectively K ₁An end; K ₂, K ₃Be respectively Q ₁Two group winding FF ' and the audio input end F of GG ' and the control switchs of G of coil M; K ₄, K ₅Be respectively Q ₂Two group winding HH ' and the audio input end H of II ' and the control switchs of I of coil N; K ₆, K ₇Be respectively Q ₃Two group winding JJ ' and the audio input end J of LL ' and the control switchs of L of coil S; C ₁Be the audio frequency input capacitor; C ₂Be separated direct sum audio frequency output capacitor; R ₁Be power tube J base stage b (biasing circuit, electric current) resistor; R ₂Power supply and loading resistor for c; R ₃Resistor for the working point of the path of e and stable J.

C ₂An end and K ₂-K ₇An end be electrically connected, C ₂The other end and negative pole and c and the R of D ₂An end be electrically connected K ₂-K ₇The other end be electrically connected respectively with own corresponding F-L end, each end of F '-L ' is direct with power supply-it is ground connection that (bearing) utmost point is electrically connected, the positive pole of D and K ₁An end K ₁' be electrically connected K ₁Other end K ₁" be electrically connected with b, K ₁With R ₁And C ₁An end be electrically connected R ₁And R ₂The other end and power supply+extremely be electrically connected C ₁The other end be electrically connected (omission), R with this machine audio-source output ₃An end and e be electrically connected, R ₃Other end ground connection.

Embodiment and operation principle of the present invention and advantage supplementary notes: contrast accompanying drawing; So loud speaker Y because of adopt permanent magnetism ferromagnetic material its magnet V and magnetic core X all do very thin, general 0.2-0.5cm even more (surpass) thin promptly enough, magnetic core X makes hollow type and will move (sound) and enclose Q ₁And/or Q ₂The unsettled the top that is placed in magnetic core is that magnetic pole place, moving-coil wall are to keep 0.1-0.2mm intermittently to be advisable with magnet core wall; The magnetic line of force at magnetic pole place is the most concentrated, the die magnetic force of density is the most powerful because have only; The degree of depth of laying with facial planes in the voice coil loudspeaker voice coil winding and magnetic core topmost the plane flush basically, to ensure the voice coil loudspeaker voice coil Shi Douke cutting magnetic line and produce maximum promotion vibrating membrane and be synchronized with the movement that thereby to obtain the maximal audio power output be max volume for the power of i.e. vibration to greatest extent that no matter moves up and down; The shape of vibrating membrane can be that matrix, convex, plane, round, square type or other Any shape or its combined shaped all can; Present embodiment is that further conserve space adopts plane, but this to be not the present invention can only adopt planar shaped (down with); Diode D with power greater than the silicon of 0.1W, withstand voltage any kind greater than 6V or germanium diode all can, present embodiment adopts good and cheap and the most widely used 1N4004 and 1N4007 etc.; Power tube J with power greater than the PNP of 0.3W, withstand voltage any kind greater than 20V or NPN pipe all can, accompanying drawing adopts 0.5-1W, withstand voltage 25-50V NPN type, gets final product on the contrary as adopting positive-negative-positive power supply polarity and NPN type; Audio signal input control switch K ₁With the two group switches of the miniature hilted broadsword of any kind such as press-key lock fixed pattern, dial type, Electronic Control as touch or press-type etc. all can, present embodiment adopts push type, use operating maintenance etc. more simple and convenient; With K ₁As a same reason, voice coil loudspeaker voice coil K switch ₂-K ₇Also with miniature press-key lock fixed pattern but use hilted broadsword simply connected formula instead and get final product; Capacitor C ₁With the non-polar condenser of capacity greater than 0.1 μ F, withstand voltage 6-10 volt, present embodiment adopts 0.3 μ F6.3 volt; Capacitor C ₂With capacity greater than the nonpolarity or electrolytic capacitor of 1 μ F all can, present embodiment adopts 10 μ F10 volt electrolytic capacitor; R ₁And R ₂Resistance with the difference at double of concrete power tube J and parameter such as multiplication factor etc. and mains voltage variations broad, obviously also just can not be in advance with concrete mode such as embodiment and stipulate its occurrence, so state reference value R ₁200 Europe-20K and R ₂20 Europe-2K use only for reference; But this does not influence the described those skilled in the art of Patent Law at all and implements this patent; Because at the selected back of concrete power tube, its product description or consult reference book such as handbook and all can obtain the concrete parameter of each item accurately, the adjustment resistance value makes parameter reach optimum range also to be the most basic prerequisite general knowledge and test a large amount of and commonly used to be arranged equally and the detailed introduction of method of adjustment and reference book, product description etc. and record and belong to general knowledge together; As previously mentioned, because of R ₃Function mainly be stable operating point and serve as insurance (resistance) thread; And the promptly in most cases little in normal operation big variation of these functions, so it is less demanding to accuracy and accuracy; In most cases resistance is all very suitable in the interval in 0.5-2 Europe, too low stability and safety effect is poor, too high important parameters such as amplifying power influence to loud speaker and the power tube power output and the latter is bigger; All the other situation and accompanying drawing and explanation thereof, advantage are introduced similar, no longer repeat superfluous stating.

Serial main advantages below the present invention also has: freely switch and switch extremely and make things convenient for freely, can switch to receiver arbitrarily at any time or the loud speaker mode need not dropped calls because the present invention integrates receiver and loud speaker and function and ability thereof; Serial great innovation and advantages such as single loud speaker double as receiver and ultra-thin, ultralight, subminaturization (can do also little also gently also thin more much than receiver earphone) and high sensitivity, high effect and high-output power and tonequality grace, distortion are little; These advantages freely are selected arbitrarily to converse for the needs at any time and the hobby that realize and satisfy melodious grace of product frivolous miniaturization, especially tonequality and consumer and the crucial serviceability and the consumption demand aspect of many decision market shares such as Music Appreciation mode provide very big convenience and competitiveness; As be beneficial to and correct that so-called ear (plug) machine alleviates radiation and to user's erroneous tendancies such as harm, because of not only bother inconvenience and reality like aforementioned use earphone for having increased radiation and harmfulness.

The present invention integrates above-mentioned serial main advantages; So tool applications well and market prospects; As except that the above and mobile phone etc. require the frivolous small-sized low energy consumption lower calorific value application, such as wide too with the application in frivolous small-sized high tone quality electronic applications such as the notebook computer in the huge market of tool, sounding electronic dictionary and products thereof with mobile phone.

Claims

1. hand-free double-directional loudspeaker for receiver of small telephone, its characteristic is following: the inside and outside magnetic pole of tool, vibrating membrane fixed support double as outer magnetic pole; The independent spaced double winding of moving-coil tool; The double winding of moving-coil uses inside and outside magnetic pole simultaneously; The double winding of moving-coil connects in the same way; The double winding list of moving-coil is used, serial or parallel connection uses, and the impedance and the power of the usage quantity of change winding and bind mode change winding are realized loudspeaker impedance and Power Conversion; Moving-coil comprises centre circle, outer ring and interior type moving-coil; The winding of centre circle and outer ring is made inside and outside each single layer coil; Tool hollow magnetic core, type moving-coil in the inner placement of hollow magnetic core, backplane level is arranged at interior type moving-coil bottom.

2. the power amplifier of the described hand-free double-directional loudspeaker for receiver of small telephone of claim 1 and control circuit, its characteristic is following: audio frequency output capacitor (C ₂) an end and audio frequency input control switch (K ₂), (K ₃), the end of (K4), (K5), (K6), (K7) is electrically connected, audio frequency output capacitor (C ₂) the other end be connected with the negative electricity of diode (D), the collector electrode (c) of the negative pole of diode (D) and power tube (J) is electrically connected, the collector electrode (c) and the resistor (R of power tube (J) ₂) an end be electrically connected audio frequency input control switch (K ₂), (K ₃), the other end of (K4), (K5), (K6), (K7) respectively with the double-winding voice-coil of own corresponding loud speaker (Y) (Q1, Q2, coil Q3) (M) two organize windings (FF ', GG '; HH ', II ', JJ ', LL ') audio input end (F), (G), (H), (I), (J), (L) be electrically connected; The double-winding voice-coil of loud speaker (Y) (Q1, Q2, two group windings of coil Q3) (M) (FF '; GG ', HH ', II '; Audio output JJ ', LL ') (F '), (G '), (H '), (I '), (J '), (L ') ground connection, the positive pole of diode (D) and audio signal input control switch (K ₁) an end (K _{1 '}) be electrically connected audio signal input control switch (K ₁) the other end (K _{1 "}) be electrically connected audio signal input control switch (K with the base stage (b) of power tube (J) ₁) with the resistor (R of the base stage (b) of power tube (J) ₁) be electrically connected the resistor (R of the base stage (b) of power tube (J) ₁) and audio frequency input capacitor (C ₁) an end be electrically connected the resistor (R of the base stage (b) of power tube (J) ₁) the other end be electrically connected resistor (R with the positive terminal (+) of power supply ₂) the other end be electrically connected audio frequency input capacitor (C with the positive terminal (+) of power supply ₁) the other end be electrically connected the emitter (e) and the resistor (R of power tube (J) with this machine audio-source output ₃) an end be electrically connected, resistor (R ₃) other end ground connection.

3. the power amplifier of the said hand-free double-directional loudspeaker for receiver of small telephone of claim 2 and control circuit is characterized in that power tube is positive-negative-positive or NPN type.

4. the power amplifier of the said hand-free double-directional loudspeaker for receiver of small telephone of claim 2 and control circuit is characterized in that diode is silicon or germanium diode.