CN208971797U - A kind of miniature plate speaker transducer diaphragm structure - Google Patents

Abstract

The utility model provides a kind of miniature plate speaker transducer diaphragm structure, the vibrating diaphragm with the first flat shape being fixed on including periphery on the first coil holder and the second coil holder, the vibrating diaphragm includes first surface and second surface, first coil holder and the second coil holder are located at the first surface and second surface of vibrating diaphragm and are fixedly connected with vibrating diaphragm, coil and/or printed circuit are disposed on vibrating diaphragm, the coil and/or printed circuit are routed by conductor material rule to be formed, the coil and/or the electric current of printed circuit internal flow and the magnetic field orthotropic by permanent magnet generation, the utility model can by Flat vibrating diaphragm loudspeaker size in the case where guaranteeing that sensitivity is greater than 105dB size reduction within 120 square millimeters, Flat vibrating diaphragm loudspeaker is applied to the built-in earplug field being put into people's external auditory canal, make Earplug equally can be realized sound field, phonotape and videotape it is bigger, be full of entire head space and extend to shoulder and reach the quiet effect of abundant sound insulation.

Description

A kind of miniature plate speaker transducer diaphragm structure

Technical field

The utility model relates to panel speaker field more particularly to a kind of miniature plate speaker transducer vibrating diaphragm knots Structure.

Background technique

Electroacoustic loud speaker is classified in a driving manner at present can be roughly divided into coil-moving speaker, electrostatic loudspeaker and plate Formula loudspeaker (also known as such as magnetic type loudspeaker).

(1) coil-moving speaker: most common, the most common loudspeaker, technology is most mature, its driving unit is by forever Voice coil in magnetic field drives the diaphragm oscillations being attached thereto.Coil-moving speaker efficiency is relatively high, can be mostly raising on sound equipment Sound device output driving, and it is reliability and durability, referring to Fig. 1 routine moving-coil earphone working principle diagram.

(2) electrostatic loudspeaker: electrostatic loudspeaker has gossamery vibrating diaphragm, is polarized by High Level DC Voltage, and polarize institute The electric energy needed is also had and to be battery powered by AC conversion.Vibrating diaphragm is suspended on to be formed by two pieces of fixed metal plates (stator) Electrostatic field in, when audio signal is downloaded on stator, electrostatic field changes, drive diaphragm oscillations.Single stator is also can be with Drive vibrating diaphragm, but bimorph transducer to recommend form distortion smaller.The special amplifier that electrostatic loudspeaker must use is by audio Signal is converted into the voltage signal of hundreds of volts, can also be driven by the method that the output end in power amplifier connects transformer Electrostatic loudspeaker, this scheme are widely adopted on the electrostatic loudspeaker of the 1960s and 1970s, it is raised to electrostatic The level of the electrostatic loudspeaker amplifier specially designed is not achieved in the compromise of sound device amplifier valuableness cost, signal quality.It is quiet Electric loadspeaker structure is accurate, and to material requirements height, and mostly, hand assembled is debugged, therefore expensive.Electrostatic loudspeaker is normal It is often considered to be used to provide the audio reproduction of high quality, is mainly used in advanced loudspeaker and speaker.Conventional electrostatic formula loudspeaking The action principle of device is that there is the pole plate of aperture and fixation to generally use pcb plate, metal plate, with the metal of insulating layer two panels Plate) seize conductive vibrating diaphragm formation capacitor on both sides by the arms, by supplying vibrating diaphragm Dc bias and giving the alternating voltage of two electrode audios, The electrostatic force occurred using positive negative electric field is driven diaphragm oscillations and acoustic radiating is gone out.For reduce vibrating diaphragm oscillating mass, The structure of vibrating diaphragm mostly uses greatly insulation film, and plates one layer of very thin electrical conductivity coating on the surface layer of insulation film, as metal, Semiconductor.

From the point of view of comparison, the relatively most common coil-moving speaker, late comer's electrostatic loudspeaker has very big advantage: first is that vibration Film can be made very thin extremely light, and such as about 1.35 microns of medium-to-high grade electrostatic loudspeaker vibrating diaphragm thickness of newer generation, this is that moving-coil is raised What the vibrating diaphragm of sound device can not approach anyway.The vibrating diaphragm of current five-star moving-coil speaker also at least 5 microns of thickness, because Moving-coil vibrating diaphragm must keep certain rigidity, in addition voice coil weight is also much larger than electrostatic.The lighter and thinner vibration of electrostatic loudspeaker Film bring is faster speed, more preferably transient response, stronger details expressive force.Second, the vibrating diaphragm of moving-coil speaker without By how to design, vibrating diaphragm stress is all uneven, and there is diaphagras, and the vibrating diaphragm of electrostatic loudspeaker is to be clipped in positive and negative two to put down The vibrating diaphragm of complete plane between row fixed polar plate, the electric field being subject to are substantially uniformity, so can accomplish Linear Driving, are not deposited It is not occurred on electrostatic loudspeaker in this limitation of diaphagras, moving-coil speaker.The structure of third, electrostatic loudspeaker is set It counts, it is big to the area of vibrating diaphragm controlled also than the loudspeaker of moving-coil technology, so electrostatic loudspeaker and moving-coil technology loudspeaker The sensitivity that compares is higher, each details at the scene of can resetting, and distortion is extremely low, and sound quality is also more preferable, sounds ear It is more comfortable.

Electrostatic loudspeaker is also apparent from relative to the shortcomings that moving-coil speaker: firstly, in price, moving-coil speaker skill Art is mature, high reliablity, is the first choice of most loudspeakers, electrostatic loudspeaker complex manufacturing process and its manufacturing technology It rests in the hand of a small number of several companies, so his price is extremely expensive.Secondly, electrostatic loudspeaker is in humidity or dust It is easy to damage when biggish environment, partially even may require that using the user of electrostatic loudspeaker and be equipped with special proof cabinet to protect It deposits, maintenance is more troublesome, and whole system volume weight is all very big, it has not been convenient to it carries, is limited to the manufacture precision of itself, Reliability and service life are lower than conventional moving-coil speaker.In addition, electrostatic loudspeaker volume is big, weight is big, it is difficult to drive, need dedicated Front end just can be used, and every time booting will the preheated one-section time.And electrostatic loudspeaker the most fatal is fixed due to it Distance between son and vibrating diaphragm is limited, the stroke limiting of vibrating diaphragm, and the attainable sound pressure level of institute is big without coil-moving speaker, i.e. low frequency Section is performed poor, referring to fig. 2 conventional electrostatic earphone working principle diagram.

(3) flat panel speaker: the driver of flat panel speaker is similar to the dynamic planar loudspeakers reduced, and planar voice-coil is embedding Enter in frivolous vibrating diaphragm.Magnet concentrates on the one or both sides (push-pull type) of vibrating diaphragm, and vibrating diaphragm vibrates in the magnetic field that it is formed. Flat unit usually provides permanent magnetic field by two pole plates, is printed on fine and closely woven circuit and is placed in magnetic field, and electric signal connects on vibrating diaphragm On printed circuit, positive and negative charge is generated in magnetic field, because of the conductive circuit of entire vibrating diaphragm even print.Circuit internal flow Electric current with by permanent magnet generate magnetic field orthotropic, by the alternating current that circulates in circuit, circuit i.e. generate defer to faraday The power of law, vibrating diaphragm vibrates in vertical direction under this force, to generate vibration, ac current signal is transformed to Voice signal.This principle of sound has the form of relatively big difference to possess many classes similar to anti-electrostatic unit again on technical detail Like the characteristic of anti-electrostatic unit, it can achieve the effect that extension is outstanding, transient state is good, distortion is small.In addition, traditional moving-coil is raised in sense of hearing The sound field of sound device, phonotape and videotape can only concentrate on ear, the region within the scope of skull, and the sound field of flat panel speaker, phonotape and videotape are bigger, Entire head space can be full of and extend to shoulder, sound can it is more true, loose, naturally, referring to Fig. 3 conventional panel earphone Working principle diagram.

In conclusion flat panel speaker can consider the advantages of combining both moving-coil speaker and electrostatic loudspeaker, Possess better performance compared to electrostatic in terms of low frequency, and is also better than moving-coil type in terms of high frequency.Due to panel speaker It is driven without boosting needed for electrostatic loudspeaker, keeps it lower than anti-electrostatic unit using threshold.

But in panel speaker transducer designs, mass of coil has direct influence for energy converter sounding effect, when When voice coil is heavier, high frequency response can be made low, and keep the resonance cycle of high range low, and when oscillating mass is big, by It is larger in inertia, so that the transient response of sound is deteriorated, therefore usually plate energy converter wishes to obtain lower coil matter in design The coil method of amount, part panel speaker product is made of the good golden material of ductility, coil thickness can be made to reach in this way Nanoscale, big spoke reduce the quality of coil, therefore obtain fabulous transient state and parsing power.But since vibrating diaphragm size limits, The good coil method of its ductility must gather on the vibrating diaphragm in larger size, thus panel speaker be applied to more sound equipment, On the electronic equipment of the larger sizes such as headset, and when vibrating diaphragm size reduction, diaphragm surface product is unable to satisfy enough coils Arrangement, even if diaphragm surface is booked coil circuit, also can still generate distortion phenomenon, therefore, existing mass of coil-thickness Relationship between degree-area can not be applied on the earplug of smaller size.Now with the diminution of platen area, panel speaker Sound quality (sensitivity) can also be decreased obviously therewith, there are no people successfully by Flat vibrating diaphragm loudspeaker application in the current field In can built-in earplug field.

Secondly, mostly flat by placing biggish plate diaphragm unit realization in the wide part of human ear in existing similar products The miniaturized application of plate vibrating membrane loudspeaker is also just not achieved without truly realizing the pleasant effect of diaphragm element and allows ear Plug realizes that sound field, phonotape and videotape as headset are bigger, can be full of entire head space and extend to shoulder, sound is trueer The quiet effect of complete sound insulation is also not achieved in real, loose, natural technical effect.

Meanwhile in the R&D process of loudspeaker, final tuning style is the practical listening by human ear always, this is just Ideal thickness, area, quality or the section of above-mentioned three for meaning to grasp coil circuit need to make a large amount of not collinear Enclose thickness, area, quality vibrating diaphragm, this not only proposes very high requirement to panel speaker manufacturing process, but also researches and develops Cost and R&D cycle are too long, and enterprise is difficult to bear.

Summary of the invention

The purpose of this utility model is to propose a kind of miniature plate loudspeaker transducing for the disadvantage on prior art construction Flat vibrating diaphragm loudspeaker size can guaranteed that sensitivity is greater than by device vibrating diaphragm and loadspeaker structure with the diaphragm for transducer Size reduction is initiative to be applied to be put by Flat vibrating diaphragm loudspeaker within 120 square millimeters in the case where 105dB Built-in earplug field in people's external auditory canal makes earplug equally and can be realized sound field, phonotape and videotape bigger, is full of entire head space simultaneously It extends to shoulder and reaches the quiet effect of abundant sound insulation.

In order to achieve the above object of the invention, a kind of miniature plate speaker transducer vibrating diaphragm of the utility model is by following What technical solution was realized:

A kind of panel speaker diaphragm for transducer structure is fixed on the tool on the first coil holder and the second coil holder including periphery There is the vibrating diaphragm of the first flat shape, the vibrating diaphragm includes first surface and second surface, first coil holder and the second coil holder point Not Wei Yu vibrating diaphragm first surface and second surface and be fixedly connected with vibrating diaphragm, coil and/or printed circuit are disposed on vibrating diaphragm, The coil and/or printed circuit are routed by conductor material rule to be formed, it is characterised in that: the diaphragm for transducer structure gross area is not More than 120 square millimeters and sensitivity is greater than 105dB, and the coil or printed circuit are correspondingly arranged on the first magnetic on the vibrating diaphragm Frame and the second magnet stand respectively correspond on first magnet stand, the second magnet stand and are disposed with the first magnetic element and second magnetic Element, the coil and/or printed circuit are by gas phase or liquid deposition in the first surface and second surface of the vibrating diaphragm And it is correspondingly formed the first subcoil and the second subcoil of series connection and/or parallel line.

The vibrating diaphragm is parallel wave shape wave or staggeredly waveform or ripples are round.

The series connection and/or parallel line can be fabricated to 1-100 layers.

First planar structure of diaphragm for transducer is the rectangle of 10mm × 12mm.

The diaphragm for transducer structure contains the circular membrane that diameter is no more than 12mm.

First subcoil, the second subcoil with a thickness of 50 nanometers to 10 microns, vibrating diaphragm with a thickness of 100 nanometers extremely 20 microns.

Miniature plate speaker transducer vibrating diaphragm provided by the utility model, structure are formed using the concatenated mode of multi-coil The plate diaphragm for transducer coil of composite construction is changed by the length and area of two kinds of coils of control come control coil control The sound property of energy device, keeps low, high frequency response and transient state more balanced, therefore reaches in the premise for guaranteeing size and sensitivity Under further realize good sound effect.

Detailed description of the invention

Fig. 1 is conventional moving-coil earphone working principle diagram.

Fig. 2 is conventional electrostatic earphone working principle diagram.

Fig. 3 is conventional panel earphone working principle diagram.

Fig. 4 is the utility model embodiment diaphragm structure schematic diagram.

Fig. 5 is the utility model embodiment diaphragm structure floor map.

Fig. 6 is the utility model embodiment diaphragm structure plane decomposition schematic diagram.

Fig. 7 is the utility model embodiment diaphragm structure perspective view of the explosion.

Fig. 8 is the utility model embodiment loadspeaker structure earplug application perspective view of the explosion.

Fig. 9 is the sensitivity test curve graph in embodiment 1 on rectangle diaphragm structure after machine.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing, in order to the understanding of technical staff of the same trade:

As shown in Figure 4-Figure 6, label respectively indicates: fastening screw 1, outline border 2, the first magnetic element 3, the first magnet stand 4, One coil holder 5, vibrating diaphragm 6, the second coil holder 7, the second magnetic element 8, the second magnet stand 9, fixinig plate 10.

Embodiment 1:

Shown in Figure 7, Fig. 7 is the utility model embodiment diaphragm structure perspective view of the explosion.The present embodiment proposes first A kind of miniature plate speaker transducer diaphragm structure is fixed on having on the first coil holder 5 and the second coil holder 7 including periphery The vibrating diaphragm 6 of first flat shape, the vibrating diaphragm 6 include first surface and second surface, and the shape of the vibrating diaphragm 6 is rectangle, having a size of The rectangle vibrating diaphragm of 10mm × 12mm, according to real work need size can be further arranged to 1mm × 12mm to 10mm × The difference size such as 1mm, such as 5mm × 8mm；2mm×3mm；4mm × 7mm etc. is not more than 120 square millimeters of size；6 periphery of vibrating diaphragm Outline border 2 is passed through by fastening screw 1 to be fixed on frame, then is connect with fixinig plate 10.Coil is laid on the vibrating diaphragm 6 And/or printed circuit, the is fixed by the first coil holder 5, the second coil holder 7 and the first magnet stand 4, the second magnet stand 9 between frame and vibrating diaphragm 6 One magnetic element 3, the second magnetic element 8 and coil and/or printed circuit, by gas phase or liquid deposition in the vibrating diaphragm 6 On first surface and/or second surface and it is correspondingly formed the first subcoil and/or the second sub-line of series connection and/or parallel line Circle, the first subcoil and the second subcoil are routed by conductor material rule and are formed, and are set to the center of the vibrating diaphragm 6；It can To be further adjusted to the only arrangement of single side coil or the two-sided arrangement for having coil according to design sensitivity.The One subcoil, the second subcoil are in full of twists and turns spiral shape or reciprocating and staggered shape structure.First subcoil is set to described second The two sides of subcoil, and first subcoil and the second subcoil vibrating diaphragm projection in the plane be not overlapped, uniformly It is laid on vibrating diaphragm 6.Meanwhile first the voice coil assembly that constitutes of subcoil and the second subcoil around the rotation pair of the center of the vibrating diaphragm Claim.

Above-described embodiment is applicant in the energy found finally after creative theoretical correction and prolonged research Enough balance vibrating diaphragm size is less than 120 square millimeters and ideal earphone of the sensitivity greater than 105dB makes structure, such as the rectangle of Fig. 9 Sensitivity test curve graph on diaphragm structure after machine.Further it not only can guarantee enough stabilizations under vibrational state, but also As far as possible reduce mass of coil under the premise of, wherein the first subcoil, the second subcoil with a thickness of 50 nanometers to 10 microns, vibration Film with a thickness of 100 nanometers to 20 microns, can not be more preferably 50 nanometers to 1 micron in the case where save the cost.

Bar magnet in magnetic element uses ferro-aluminum boron magnetic stripe, in indenting arrangement, further, since the utility model Vibrating diaphragm in the case where size reduction, sensitivity is not substantially reduced, thus can also guarantee total harmonic distortion rate one Under the premise of fixed, ferro-aluminum boron magnets further are replaced using ferrite lattice to reduce cost.

Preferably, the first subcoil length is the m power times of the 10 of the second subcoil length, wherein 0≤m≤5； The projected area of first subcoil is the s power times of the 10 of the second subcoil projected area, -3≤s≤6；Same projection area The first subcoil quality be the second subcoil quality 10 n times side times, wherein -3≤n≤5, wherein m, s, n are immeasurable Guiding principle parameter.

Connection type for electric connection structure based on existing coil and conducting wire, is known to the skilled person technology, Therefore details are not described herein.

Embodiment 2

The present embodiment provides another diaphragm for transducer structures and the difference of embodiment 1 to be: vibrating diaphragm is circular membrane, directly Diameter is 12mm, can also further be set as needed into 1mm, 2mm, 5mm, 10mm, 11mm etc. no more than 12mm other are straight Diameter size, magnet shape are toroidal magnet, ring magnet or spiral shape magnet, relatively structure in embodiment 2, square in embodiment 1 The manufacturing process of shape vibrating diaphragm is simpler, advantage of lower cost, is preferred embodiment.

Embodiment 3

The present embodiment provides a kind of loudspeakers with the diaphragm for transducer in embodiment 1 or embodiment 2, and structure is as schemed Shown in 8, Fig. 8 is the utility model embodiment loadspeaker structure earplug application perspective view of the explosion, provided in this embodiment a kind of flat Board-like earplug, has earphone cable, earplug shell and built-in plate diaphragm unit, and plate diaphragm unit therein is such as implemented above Described in 2 content of example 1 and embodiment, details are not described herein.

It should be noted that the above content is combination specific embodiments to further detailed made by the utility model Illustrate, and it cannot be said that specific embodiment of the present utility model is only limitted to this, under the guidance of above-described embodiment, art technology Personnel can carry out various improvement and deformations on the basis of the above embodiments, and these are improved or deformation to fall in this practical new In the protection scope of type.

Claims (6)

1. a kind of miniature plate speaker transducer diaphragm structure, is fixed on the first coil holder and the second coil holder including periphery Vibrating diaphragm with the first flat shape, the vibrating diaphragm include first surface and second surface, first coil holder and the second coil holder It is located at the first surface and second surface of vibrating diaphragm and is fixedly connected with vibrating diaphragm, coil and/or printing electricity are disposed on vibrating diaphragm Road, the coil and/or printed circuit are routed by conductor material rule and are formed, the coil and/or printed circuit internal flow Electric current with by permanent magnet generate magnetic field orthotropic, pass through the alternating current that circulates in coil and/or printed circuit, circuit i.e. produce The raw power for deferring to Faraday's law, vibrating diaphragm vibrates in vertical direction under this force, so that vibration is generated, the permanent magnetism Body be ferrite lattice and/or；Ferro-aluminum boron magnets, it is characterised in that: the diaphragm for transducer structure gross area is no more than 120 squares of millis Rice and sensitivity are greater than 105dB, and the coil and/or printed circuit are correspondingly arranged on the first magnet stand and the second magnetic on the vibrating diaphragm Frame respectively corresponds on first magnet stand, the second magnet stand and is disposed with the first magnetic element and the second magnetic element, the line Circle and/or printed circuit on the first surface of the vibrating diaphragm and are correspondingly formed series connection and/or simultaneously by gas phase or liquid deposition First subcoil on line road.

2. miniature plate speaker transducer diaphragm structure according to claim 1, which is characterized in that the vibrating diaphragm is flat Traveling wave shape wave or staggeredly waveform or ripples are round.

3. miniature plate speaker transducer diaphragm structure according to claim 1, which is characterized in that it is described series connection and/ Or parallel line can be fabricated to 1-100 layers.

4. miniature plate speaker transducer diaphragm structure according to claim 1, which is characterized in that the energy converter vibration The structure of the first plane of film is the rectangle of 10mm × 12mm.

5. miniature plate speaker transducer diaphragm structure according to claim 1, which is characterized in that the energy converter vibration Membrane structure contains the circular membrane that diameter is no more than 12mm.

6. miniature plate speaker transducer diaphragm structure according to claim 2, which is characterized in that first sub-line Circle with a thickness of 50 nanometers to 10 microns, vibrating diaphragm with a thickness of 100 nanometers to 20 microns.