CN1812647B - Variable impendance and power type loudspeaker - Google Patents

Abstract

A loudspeaker with variable impedance and power is composed of vibration film and its fixing rack, alloy permanent magnet, hollow magnetic core of internal magnetism ant its corresponding internal voice coil. It is featured as using said rack also as external magnetic pole, using internal spaces of said core to lay double winding voice coils, fixing winding on internal and external wall of movable coil with baseboard for reinforcing fixture.

Description

Impedance and power variable formula loud speaker

Because 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 inevitably, weight, (fact all proves with experience reliability repeatedly: 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 with difficulty of manufacturing cost, especially in the face of more and more miniaturization, ultra-thinization, the development of ultralightization and consumer market demand general trend then more demonstrate most important property such as its market competitiveness height.Receiver generally all is that impedance is very high for loud speaker, the sounding components and parts that power is very little, therefore it is difficult to replace loud speaker and function thereof, and because the impedance height carefully makes the D.C. resistance of its coil very big with line, adding because of high impedance makes power output very low, these factors are added together and make its power consumption and heating also just inevitable equally very big, so its energy utilization efficiency is very low, especially for being extensive use of, the mobile phone that quantity is extremely huge 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 inevitably, particularly to the bigger electromagnetic radiation intensity of human body harm; There is a kind of wide-spread and what is called of using to replace the receiver of nearly body to reach reducing IVR equipment to comprise that mobile phone is the amount of radiation of mobile phone and intensity 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 harm to human body and surrounding enviroment, because connect between the resistance of the electric wire of earphone and earphone voice coil loudspeaker voice coil winding and they, comprise and this machine between distributed capacitance (amount) between formed mutually one and/or a plurality of new be equivalent to the capacitance-resistance coupling and with electromagnetic wave repeat transmitted and the receiver of induction type, namely this moment, earphone and on line thereof were served as the antenna of strengthening propagating electromagnetic radiation, and it is more much longer than airborne antenna, the scope of laying is also much wide, scope and the intensity of electromagnetic radiation has just been strengthened in the stack of these factors greatly, and the harm nature is just bigger wider than nearly body earphone; Also has a kind of same wide-spread and use, even ratio increase earphone is 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, 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 substantially do not possess radiation protection ability, seldom even at all can not alleviate any radiation and energy thereof, even so, even if very can effectively alleviate radiation and harm, also to transmit and receive signal strength signal intensity be cost to sacrifice, because can alleviate the means of radiation intensity and mainly be nothing but the shielding electromagnetic wave, this just must cause strengthening, and to transmit and receive power be that cost is offset diaphragm to shielding electromagnetic waves, can't help consuming energy more, and the amount of electromagnetic radiation and the intensity that also can positive correlation ground increase 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 significantly shortened battery life, the time that use each charging back also significantly shortens, 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 is extremely strong, speech quality such as sound are suddenly big or suddenly small, smudgy, intermittent even conversation fault waits as broken string repeatedly functional reliability and other performance is 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 and serious increasing because of battery scrapped the increase of the environmental pollution that produces and use cost such as accelerating (battery of mobile phone is generally all more expensive, tens of at least even up to a hundred yuans); Increase loud speaker because answering with respect to the remote-wireless that receiver is sayed so can effectively reduce electromagnetic radiation and the harm of and surrounding enviroment next to the skin to human body, but have aforesaid such as increasing not enough problems such as components and parts and volume thereof, area, weight, cost.Obviously, innovation sounding components and parts that the low radiation hazard of the confidentiality of receiver and loud speaker if can be combined and be equipped with innovation and can (easily) control drive power amplifier, then it can not only effectively overcome the serial shortcoming of above-mentioned prior art and product, and its serial main advantages is that advantages such as the market share all are apparent all will finally be embodied in the market competitiveness especially.

Total be exactly impedance and power variable formula loud speaker for one goal of the invention that the present invention designs for the serial problem that solves prior art and product, 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, resistance is big by the superfine number of turns in line footpath is a lot of to change receiver, power consumption and heat production 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; Because of the more true to nature and sensitivity of the little tonequality of the big and integrated distortion of moving-coil space higher, the number of turns few and easily increase line directly thus the resistance energy consumption and the heating littler, but it can bear and export very big audio power, not only solved receiver and decided circle little such as power, the energy consumption height, serious distortion even hoarse unpleasant to hear all difficult problems such as serious noise that the easy distortion of sound causes because the vibrating membrane space is extremely limited when especially sound is big, also magnetic material just can obtain powerful permanent magnetic because 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 extremely easily do very for a short time, very light, very thin but its tonequality, power and sensitivity are but very excellent, thereby solved small-sized that existing product needs to be resolved hurrily, ultra-thin, ultralight, high-power and high tone quality, a serial difficult problem such as high sensitivity has satisfactorily realized the present invention and goal of the invention for a total inventive concept comprehensively.

Accompanying drawing and operation principle and advantage explanation:

Contrast accompanying drawing: Y is loud speaker; V is the magnet of Y; Q is moving (sound) circle of Y, and B is for reinforcing the specially designed backplane level of Q; X is the hollow magnetic core, be the internal magnetic pole of Q; Z is the vibrating membrane of Y, and P is the fixed support of the Z Q outer magnetic pole of holding concurrently; Two group windings of the coil M of Q are respectively FF ' and GG '.

The contrast accompanying drawing is further introduced structure, function and innovation advantage: loud speaker Y is because adopting the permanent magnetism ferromagnetic material, so its magnet V does very thinly, magnetic core X also makes hollow type, this has just alleviated weight and volume greatly; In addition, because of magnetic core be hollow type, so available in it space as lay moving-coil Q and activity space, this makes loud speaker miniaturization more with regard to having saved moving-coil and movable a lot of spaces that should account in addition thereof again; Moreover, but moving coil winding of the present invention is coil change traditional single line list around single group series connection for double-wire spaced two groups and can be singly be absolute coil with the independent winding of multiple usage such as serial or parallel connection again and purposes, make every group of coil in, external diameter and weight with effectively (namely produce and cutting magnetic line) line length and exert oneself size and the uniformity and resistance (comprising D.C. resistance and AC impedance) etc. and volume with the increase power output and reduce that distortion namely improves the closely-related serial important indicator of tonequality (see below and state) and data are all accomplished highly consistent simultaneously, and these significant drawback of traditional voice coil loudspeaker voice coil and too far behind to catch up just, (D.C. resistance reduces power output and generates heat because of direct power consumption as the D.C. resistance of its single coil and energy consumption thereof, even the thing of burning voice coil loudspeaker voice coil also happens occasionally, be not rare, comparatively speaking AC resistance be impedance generally do not consume energy do not generate heat yet) only be 1/2 of tradition series connection voice coil loudspeaker voice coil, be under receiver or hands-free state, all can only appoint one group of voice coil loudspeaker voice coil to reduce volume and economize on electricity to prolong battery service time and life-span when only needing small volume, voice coil loudspeaker voice coil D.C. resistance in parallel only be tradition 1/4 of the voice coil loudspeaker voice coil of connecting when the big volume of needs, these are because the number of turns of each of two absolute coils and D.C. resistance only are 1/2 of its series coil, be equivalent to strengthen one times of line footpath because of parallel connection again simultaneously, its D.C. resistance is reduced by half again, when needs utmost point amount of bass, also can connect, this shows its adaptability, applicability and bag (holding concurrently) capacitive is very wide very strong, advantage is more also important really, because these major function of most audio communication instruments and places of use value just; The 4th, not only make coil diameter increasing and direction also outside because expanding, magnetic core is designed to the hollow magnetic core and moving-coil is designed to inner ring and corresponding internal layer winding thereof, particularly inner ring of the present invention is attached on the speech coil framework inwall because of coil, can be difficult to rub with magnetic core by the protective effect of the voice coil loudspeaker voice coil outer wall of no winding, unless the degree that friction seriously all is worn through to outer wall, and the probability that this possibility namely takes place is very little, but also be the backplane level B of an about 0.1-1mm Bao Kehou in addition in the voice coil loudspeaker voice coil bottom to strengthen support force, add in the direct firmly splicing of voice coil loudspeaker voice coil top and vibrating membrane even the general, external form voice coil loudspeaker voice coil and vibrating membrane be being made of one and strong resistance to deformation directly, these also are the serial important distinct advantages that the present invention just may have, so can prevent effectively that the real core magnetic core of magnetic seam formula loud speaker that common traditional double-deck magnetic pole constitutes is because of moving-coil coil long-term motion and heating or the dilatancy and because of fastener such as Luo silk nail or the binding agent of collision or fixing double-deck magnetic pole such as glue is loosening makes double-deck magnetic pole produce displacement of making moist, make the friction of coil and magnetic core and the little distortion of sound and when coil covering (because of the enamelled wire enamelled coating very thin and descended by thermal softening or sex change such as adhesive force in addition break wait very easy to be very fast) by the magnetic core worn-off after the powerful noise of generation] or dual-purpose space operation formula, distortion and displacement and adverse consequences thereof have not only effectively been prevented, weight and/or volume have also effectively been alleviated, and efficiently utilized inner magnet field force and density of line of magnetic force far above the outside, magnetic flux density is also far above the magnetic signature of outside, even this only can produce more weak alternating magnetic field and magnetic force with regard to making moving-coil only pass to light current, (homo-polarity magnetic repels each other but it interacts at the powerful constant permanent magnetic with the permanent magnet generation, the coupling of heteropolarity magnetic force) time, also can produce same powerful suction to it because of powerful permanent magnetic, repulsion and enlarged markedly the active force of (being equal to amplification), thereby strengthened the movable energy of moving-coil, vibrating membrane that its promotion is bonded as one with it is that the energy of sounding body Z is also grown simultaneously, that is less alternating magnetic field (power) can be by means of stronger permanent magnetic, only needing to consume less sounding power is that portion of energy that cost just can be at an easy rate also converts the strength of part permanent magnetic to sounding required consumption namely promotes the moving kinetic energy of voice coil loudspeaker voice coil and vibrating membrane fortune (shaking) and is converted into further therefrom that to promote kinetic energy that air fortune (shaking) moves be the acoustic energy of sounding, thereby available less input power also can obtain big volume, that is increased the power output of moving-coil, that is to say that less alternation magnetic force can be amplified by stronger permanent magnetic, so available less input power obtains bigger power output and can make further frivolous small-sized and high-qualityization of loud speaker of the present invention and power driving circuit and corresponding components and parts thereof, the electric energy and the caloric value that consume are also littler because of the increase of power output according to the law of conservation of energy principle, receive thereby significantly reduce, send out power and caloric value and battery and power consumption and environmental pollution and use cost, as because only needing less sounding input power, just making only needs very little audio input signal just can reach the conversation purpose, be equivalent to improve machine sensitivity and speech quality as reducing correspondent tropism and broken string etc., this just can make emission and received power all can two-wayly reduce, mean no matter be quantity and the transmitting power of cell site and transmitter thereof or receiving equipment namely with it the transmitting-receiving power of corresponding IVR receiving equipment can both two-wayly reduce; Fixing (holder) frame P of the vibrating membrane Z of loud speaker Y and voice coil loudspeaker voice coil Q makes with magnet with wide and parallel, and because of its with magnet with wide and parallel, be again that using with magnet is that the identical permanent magnetic material of hollow magnetic core is made and with the powerful permanent magnetic force of tool, so be also used as outer magnetic pole and invigoration effect in permanent magnetic and the effect of moving-coil, magnetic force strengthening effect to inner ring extremely significantly and further makes the frivolous miniaturization of loud speaker, thereby make the overall volume of loud speaker and weight reduce to bottom line, these favorable factors all further reduce the volume of the mobile phone of the especially extensive production and marketing use of complete machine more effectively, weight, caloric value and energy resource consumption and environmental pollution and use cost are as the receipts of extending battery life and minimizing cell site's quantity and (transmitting power) scale and emission and receiving equipment, send out that power etc. causes to environmental pollutions such as the electromagnetic hazard of human body and refuse battery quantity, and reduce the battery power consumption and prolong the battery stand-by time that (frivolous miniaturization is fundamental mark with improving the market competitiveness, and lower calorific value is frivolous small-sized basic prerequisite) etc. serial significant advantage.

Embodiment and operation principle of the present invention and advantage supplementary notes: contrast accompanying drawing, loud speaker Y is because adopting the permanent magnetism ferromagnetic material, so its magnet V and magnetic core X all do very thinly, general 0.2-0.5cm in addition more (surpass) thin namely enough, magnetic core X makes hollow type and will move the unsettled the top that is placed in magnetic core of (sound) circle Q is the magnetic pole place, the moving-coil wall is to keep 0.1-0.2mm intermittently to be advisable with magnet core wall, because have only the magnetic line of force at magnetic pole place the most concentrated, the die magnetic force of density is the most powerful, the degree of depth of laying topmost flushes on the plane with magnetic core substantially with facial planes in the voice coil loudspeaker voice coil winding, to ensure the voice coil loudspeaker voice coil Shi Douke cutting magnetic line and produce the maximum promotion vibrating membrane i.e. power of vibration that is synchronized with the movement to greatest extent that no matter moves up and down, thereby obtaining the maximal audio power output is max volume, the shape of vibrating membrane can be 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.

The present invention also has following serial main advantages: because the voice coil loudspeaker voice coil of loud speaker of the present invention is the separate double winding, can or be used in combination by single usefulness, series, parallel between each winding and changes impedance and power, but therefore double as receiver; And have ultra-thin, ultralight, subminaturization (can do also little also light also thin more much than receiver earphone) and high sensitivity, high effect and high-output power and tonequality grace, the serial great innovation of the little grade of distortion and advantage, these advantages are for realization and satisfy the frivolous miniaturization of product, especially the melodious grace of tonequality and consumer's needs at any time and likes and freely select arbitrarily to converse and 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 that so-called ear (plug) machine etc. popular in the great mobile phone of correction such as consumption alleviates radiation and to user's erroneous tendancies such as harm, not only bother inconvenience because using earphone, and because the earphone line is equivalent to and to have prolonged radiation real in having increased radiation and harmfulness.

The present invention integrates above-mentioned serial main advantages, so tool applications well and market prospects, as except 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)

1. an impedance and power variable formula loud speaker, its feature is as follows: the inside and outside magnetic pole of tool, hollow magnetic core, hollow magnetic core adopt permanent magnetic material to make; Vibrating membrane fixed support material is identical with the hollow magnetic core, makes with the hollow magnetic core with wide and parallel double as outer magnetic pole; Type moving-coil in the inner incorporeity magnetic core of hollow magnetic core, the inner placement; The independent spaced double winding of interior type moving-coil tool, double winding are with being connected, and the double winding list is used, serial or parallel connection uses, thereby realize loudspeaker impedance and power conversion by the usage quantity of change winding and impedance and the power of bind mode change winding; The winding of interior type moving-coil is fixed on its inwall, and backplane level is arranged at interior type moving-coil bottom; Double winding shares inside and outside wall and the backplane level of vibrating membrane and outer magnetic pole and moving-coil.