CN105246006A - Surround with anisotropic compliance of loudspeaker and passive radiator - Google Patents

Abstract

The invention relates to an improved design of a surround which is also called an edge or a folding ring. The surround is a flexible connection and suspension component between a vibration component such as a vibrating diaphragm or a vibrating plate and a fixed portion such as a bracket or a sound box wall. The surround is generally made of materials such as rubber, so that the surround is commonly known as a rubber edge. The surround of the loudspeaker and the passive radiator provided with a Z-shaped or S-shaped zigzag flat elastic piece has anisotropic compliance. The surround has great compliance, that is, the surround is soft, in the axial direction, namely, the normal moving direction of the loudspeaker; and the surround has small compliance, that is, the surround is hard, in the horizontal direction. The surround can be used as an airtight suspension supporting system of a vibrating diaphragm of the loudspeaker and the passive radiator, and can also be applied to flexible airtight connection between other vibrating components and a fixed component.

Description

There is the loud speaker of anisotropy compliance and the outstanding limit of passive radiator

Technical field: a kind of outstanding limit (English surround, also " limit ", " ring " is claimed, be the vibrating mass such as vibrating diaphragm, oscillating plate and the standing part such as support, audio amplifier tank wall flexibly connect sprung parts, usually make with materials such as rubber, therefore be commonly called as " rubber edge ") Curve guide impeller: have in a zigzag or the loud speaker of plane shell fragment of S shape complications and the outstanding limit of passive radiator, it has anisotropic compliance, namely in axis, loud speaker proper motion direction, there is large compliance, namely softer.And in the horizontal, outstanding limit has little compliance, namely harder.Can be used as the airtight suspension strut system of loud speaker and passive radiator vibrating diaphragm, the flexibility that also may be used for other vibrating mass and fixed part is tightly connected.

Background technology: carry the universal of sound system along with small-sized, the design of small-size sound box is more prevalent, and research day is many, and in order to miniaturization, passive radiator formula is designed to as first-selection.Correlative study can with reference to US7,568,552, US6,658129, US6, the invention of 658,129 grade Litovsky, Philips and Sahyoun etc.What current design generally adopted is a plate radiator supported with outstanding limit, seldom by traditional loudspeaker type, has the passive radiator playing ripple and the support of outstanding limit simultaneously.And in order to extend the response of low frequency, the tuned frequency of radiator is very low, and thus the quality of radiator is larger, thus, the alone outstanding limit of radiator is carried out suspension strut and just be difficult for very much, the irregular movement of radiator or to wave wobble comparatively obvious, and replaying bass effect is general.Therefore large mass radiation device only determines core by outstanding limit support and control just becomes technological difficulties, is also a focus of research at present simultaneously.

And in loud speaker, in order to adapt to the trend of " thin " " gently " of consumer electronics, adopt without playing ripple, only bringing into use, especially in ultrathin flat panel loudspeaker with the design that outstanding limit hangs centering.But thus, originally primarily of play ripple rise determine core function, just can only be provided by outstanding limit, the requirement determining core ability on outstanding limit is improve a lot.

And my patent application 201410221525.8 formerly, " there is the loud speaker of airtight air chamber and the outstanding limit of passive radiator ", oppositely fit together by two common rubber edges, namely the inside and outside contact site on two limits glues together completely, and in the annular air post formed, the gas-tight bulkhead that uniform four elastomeric materials are made, cuts off and glue together with flexible glue water air tightness with the contact-making surface of upper and lower rubber edge, forms four isolated air-tightness air chambers also completely cut off with the external world mutually.The many air chambers of air-tightness of this design hang limit when being used on passive radiator or active loud speaker, such as, when gluing together upper flat plate oscillating plate, if vibrating mass as oscillating plate have transverse movement trend time, first be that each partition can be stretched or extrude, produce elastic reactance, suppress the transverse movement trend of damping vibration plate.Meanwhile, the transverse movement of oscillating plate can extrude or stretch each air chamber, such as oscillating plate is when an air chamber direction moves downward wherein, and air chamber is below squeezed, and air pressure strengthens, and produces damping force upwards; Air chamber is simultaneously stretched, and air pressure inside reduces, and produces damping force upwards, and the damping force of two air chambers is added synthesis one damping force upwards, cuts off together with the damping force that produces, the motion that damping suppression oscillating plate is downward well with each.

But in further experiment, when finding that " having the loud speaker of airtight air chamber and the outstanding limit of passive radiator " is used in ultrathin flat panel loudspeaker, in thin design, brocade silk thread and the outside lead-in wire of voice coil loudspeaker voice coil, cabling has certain difficulty, is easy to produce abnormal sound, is unfavorable for producing.And the distribution of weight of lead-in wire brings asymmetry in vibrational system, especially affects more remarkable on miniature loudspeaker unit.And in designing without bullet ripple, the core ability of determining of " having the loud speaker of airtight air chamber and the outstanding limit of passive radiator " is still enough, to be improved.

And on passive radiator, further experiment finds the aforesaid outstanding limit with airtight air chamber, the space be still improved.Reason is as follows: in order to obtain low tuned frequency, the quality of radiator is very large, General Purpose Rubber limit cannot support centering completely, even if adopt the outstanding limit design with airtight air chamber of my earlier application aforesaid, support is determined core problem and is greatly improved, but still waving of oscillating plate cannot be avoided completely, still there is certain distortion.

" there is the loud speaker of integrated metal strength members and the outstanding limit of passive radiator " that I proposed on June 19th, 2014, in the earlier application of application number 201410279525.3, propose as shown in Figure 1, outstanding limit add by outstanding limit outer rim, through lug boss, arrive the elastic metal strip of outstanding inner edge, limit, elastic metal strip is positioned at inside, outstanding limit or is fitted in the surface on outstanding limit.The brace summer of elastic metal strip can improve the suppression that the transverse direction of outstanding limit to oscillating plate or vibrating diaphragm does not advise motion effectively.

Through further experiment analysis, find above-mentioned prior art and in first patent and application, still not enough to some extent technically.Make a concrete analysis of as follows, with reference to accompanying drawing 2, the technical scheme of my earlier application of application number 201410279525.3 adopts the mode of elastic metallic spring to strengthen determining core power, and its technique effect is obvious, after common outstanding limit adds upper spring, determine core power and obviously increase.But but find that the compliance on outstanding limit alters a great deal during actual use, hardening a lot, when adopting the internal volume of same oscillating mass and same loudspeaker unit and audio amplifier, namely other condition complete with prerequisite under, the tuned frequency of passive radiator increases a lot, and its reason is hanged after limit added spring exactly, compliance is deteriorated, hardening, and this structure is isotropic on compliance, namely axial and horizontal compliance is identical.In order to reduce tuned frequency, obtain low low-frequency cut-off frequency, lower bass of namely resetting, close with the tuned frequency before adding spring, just must strengthen the oscillating mass 3 ~ 5 times of radiator.

But that thus, strengthens outstanding limit determines core ability,------low frequency variation---strengthens oscillating mass to improve distortion, improves low frequency, and---what the oscillating mass needs after increasing were larger determines core power---determines core effect improved limited.Namely define a vicious circle, the improvement effect that the final elastic hardness strengthening outstanding limit obtains is very limited.

Carefully analyze, can find, currently available technology is all that the elastic hardness strengthening outstanding limit determines core power to improve, that is, it is synchronous that the transverse direction on outstanding limit determines the reinforcement of core power with the change of the axial compliance on outstanding limit, and the compliance on outstanding limit is being axially and laterally isotropic, thus improve and determine core power and will strengthen outstanding limit hardness, improve the tuned frequency under same service condition, low frequency reproduction is deteriorated, minimum playback frequency improves.In order to force down this minimum playback frequency, can only be just strengthen oscillating mass, tuned frequency is forced down.Thus, what after strengthening, the oscillating mass needs of 3 ~ 5 times were larger determines core power to control, and substantially offsets totally originally determining the effect improved effect of core.This defect, in aforesaid prior art, all exists, and in other words, in those skilled in the art's numerous researchs for many years, and the compliance failing to propose outstanding limit should be this key technology point anisotropic.

The key solving above-mentioned vicious circle is exactly while the transverse direction that whether can strengthen outstanding limit determines core power, less change the axial compliance on outstanding limit, namely substantially do not raise tuned frequency, for example, if determining core power strengthens while 5 times, the axial compliance on outstanding limit only reduces 2 times, uses the oscillating mass of twice just can obtain original tuned frequency like this, obtains the minimum playback frequency of same bass.And the core power of determining that the effect of determining core is five times controls the oscillating mass of twice, determining that core is effect improved will be obvious.In other words, be exactly the improvement of the compliance to outstanding limit, desirable scheme should be anisotropic, instead of isotropic, makes outstanding limit have little lateral complication, and has large axial compliance simultaneously.

Summary of the invention: the design that proposition one is new for this reason, adds the plane shell fragment of the zigzag complications that several beryllium-bronzes are made or S shape complications in the bottom on outstanding limit, connect inner edge and the outer rim on outstanding limit.Tortuous strip width is 1 ~ 2MM, and thickness is 0.1 ~ 0.2mm, and to obtain the outstanding limit with anisotropy compliance, further, the lateral complication on outstanding limit is much smaller than axial compliance.Plane shell fragment also can be made with other material such as endurance metal or elastic resin, and plane shell fragment has two terminations and middle tortuous band linkage section.Two terminations connect two parts respectively, and middle zigzag section provides amplitude and the restoring force of movement in vertical direction, and compliance is larger.And at in-plane, interlude provides larger elastic force, suppress the motion in this direction.Be usually used at present in the electron focusing mechanism of the camera lens of digital camera.The dish bullet ripple that early stage loud speaker was also used in history also belongs to the category of this type of plane shell fragment similar, but already replace by cloth matter Wave shape spring wave.

Identical with my earlier application 201410279525.3, the two ends of the zigzag that beryllium-bronze is made or S shape plane shell fragment can become terminals of connecting wire, outboard end can expose the upper surface of outstanding limit outer rim, forms the binding post of loud speaker, with external circuit as power amplifier etc. is connected.Medial extremity can expose the lower surface of oscillating plate, to weld voice coil loudspeaker voice coil wire.So, the terminal of loud speaker and bright and beautiful silk thread can being omitted, also without the need to considering the spatial altitude in traditional design required for bright and beautiful silk thread up-down vibration, also without the need to worrying the problem of routing, thus can reduce the whole height of loud speaker.Lead-in wire reduces the fraction defective caused by bright and beautiful silk thread simultaneously, also can reduce bright and beautiful silk thread wire diameter, because can not significantly vibrate.This point is especially crucial for small diameter loudspeaker, because reduce bright and beautiful silk thread wire diameter to decrease oscillating mass on the one hand, more crucially decreases the symmetric destruction of lead quality to vibrational system.This technique effect is similar with the technique effect bright and beautiful silk thread being woven into the design playing face, Pori, plays the same tune on different musical instruments.But the design also has the effect strengthening determining core simultaneously.And furthermore, being exposed to the outer surface of the outer edge part on outstanding limit, one end (one end near support) of beryllium-bronze S shape plane shell fragment can replace the terminal board of loud speaker, and a thing three is used.

Compared with Litovsky scheme, one is that present design obtains anisotropic outstanding limit compliance, and in Litovsky scheme, the compliance on outstanding limit is isotropic.One is that the design obtains less height, is only equivalent to the thickness (outstanding limit is counter paste, namely outstanding limit is concave upright) of oscillating plate, or is equivalent to oscillating plate thickness and adds outstanding limit height (outstanding limit is just pasted).And the thickness that the height of the oscillating component of Litovsky scheme is oscillating plate adds that outstanding limit height of projection adds the height of projection of brace summer, be about three times of oscillating plate thickness usually like this, under current pursuit design of thin, little situation, this point is particularly crucial.Simultaneously.The zigzag plane shell fragment of the design can be a part for voice coil leads simultaneously, can replace the terminal of loud speaker further, belong to the invention of multiple factor combination.

Adopt this patent design reinforcement hang limit prepare loud speaker can realize without play ripple design, compared with the design playing the loud speaker of ripple with use, the design can be regarded as achieve and play the integrated of ripple and outstanding limit, two elements are united two into one, and the whole height reducing loud speaker (originally has bullet ripple to design ripple of being hit by a bullet and all will leave the spatial altitude being greater than peak swing up and down, namely occupy the height of twice amplitude.And in the design, strengthen outstanding limit, under oscillating plate, only needing the height leaving one times of amplitude because only use.Design height has differed from the height of one times of amplitude herein.) decrease parts and operation simultaneously, reduce fraction defective, eliminate the bullet ripple in traditional design and the operation playing ripple is installed.But the technique effect of the whole height reducing loud speaker is additionally obtained.Belong to the invention of omitting elements.

And as can be seen from citing document, the technical staff of the world-famous major company such as philips, bose is devoted to the centering ability improving outstanding limit for many years always, namely suppress the ability of wobble or rockmode motion.But as can be seen from analysis above, design outstanding limit and there is this key technology point of anisotropic compliance do not have found, but design various scheme, but be all confined to isotropic compliance.Can find out, this design of outstanding limit with anisotropy compliance is not apparent, but creative, belongs to the creationary technological improvement solving puzzlement technical staff technical problem for many years of patent statute.

The scheme of the design can cast directly over inside, outstanding limit the two ends of zigzag plane shell fragment, forms the outstanding limit of integration, only exposes outstanding limit at two ends, facilitate wiring.When being applied on passive radiator, because do not need lead-in wire, surface or inner, outstanding limit can be glued together or be cast in the two ends of plane shell fragment completely.

When being applied to loud speaker, the two ends of the plane shell fragment that metallic conductor is made are exposed outside outstanding limit, play the partial action of voice coil leads.As special case, the lateral ends of S shape plane shell fragment, directly expose the upper surface of the outer edge part on outstanding limit, form splicing ear, that directly plays crimping or grafting exempts from weldering (if outstanding sapwood material adopts heat resistant resin material, also can weld) effect of terminal board, omit terminal.

Further improvement project, also can become one or two parts the plane shell fragment compound of multiple separation, whole be glued on outstanding limit or die casting in outstanding limit.

Further improvement project, can in a zigzag tortuous be replaced by plane shell fragment or historical dish play known in ripple disclosed in any pattern or band strips.

Meanwhile, the outstanding limit of design of the present invention can be the outstanding limit of passive radiator, also can be initiatively, i.e. the outstanding limit of ventional loudspeakers.The shape on outstanding limit also can be other common shape simultaneously: as track type, ellipse and rectangle etc.Meanwhile, the design also can divert from one use to another in office what is the need for simply and will carry out the occasion of damping suppression to the irregular movement of oscillating plate or vibrating mass.By common outstanding limit, the outstanding limit with S shape plane shell fragment of the present invention's design can add that the S shape plane shell fragment of surface bonding is made, also the outstanding limit of band S shape plane shell fragment directly can be made up of mould, wherein surface or inner S shape plane shell fragment can be the parts of voice coil leads, and can replace the terminal board of loud speaker.Zigzag or S shape plane shell fragment can be made with metal materials such as beryllium-bronze, phosphor bronze, spring steel plates, also can make with elastic resin material.And the meander-shaped of common plane shell fragment or pattern can be incorporated in the design simply.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the design of the earlier application of my application number 201410279525.3.

Fig. 2 is the schematic diagram of the metal spring that prior art uses.Be equivalent to the US7 of Litovsky, 568, the brace summer in 552 patents, be also equivalent to the integrated brace summer in my earlier application.T direction is the direction of the desirable lengthwise movement of oscillating plate: axially, and be the direction of oscillating plate irregular movement by line direction in outer end in brace summer: horizontal H.The spring of visible this kind of structure has isotropic compliance, and the elasticity in T and H direction or compliance are equal.

Fig. 3 is the signal of the panel speaker that current alone outstanding limit supports.1 is outstanding limit, and 2 is oscillating plates, and 3 is voice coil loudspeaker voice coils, and 4 is voice coil leads, and 5 is terminals, and 7 is audio amplifier wiring, and 8 is audio amplifier tank walls, and 9 is perforation that wiring passes audio amplifier tank wall, and 10 is audio amplifier external spaces, and 11 is spaces in audio amplifier.

Fig. 4 is the schematic diagram of basic scheme of the present invention.The above is the view of the upper surface on outstanding limit, and centre is A-A profile, and here is the view of outstanding limit lower surface.Wherein 1 is outstanding limit, and 6 is the zigzag zig zag plane shell fragments being fitted in outstanding limit lower surface, on four uniform lower surfaces being glued at outstanding limit of zigzag zig zag plane shell fragment.

Fig. 5 is the partial enlargement of Fig. 4 midship section figure.

Fig. 6 is the schematic diagram improved further Fig. 4 scheme of the present invention.Upper and lower surface view and the Fig. 4 on outstanding limit are similar, omit, only draw the profile of plane shell fragment local.1 is outstanding limit, and 6 is the zigzag zig zag plane shell fragments being fitted in surface, outstanding limit, and wherein 6.1 is two terminations that plane shell fragment exposes outstanding limit, in order to connect the terminal of voice coil loudspeaker voice coil and loud speaker respectively,

Fig. 7 is the schematic diagram to the further improvement project of Fig. 6 scheme of the present invention.Upper and lower surface view and the Fig. 4 on outstanding limit are similar, omit, only draw the profile of plane shell fragment local.1 is outstanding limit, and 2 is oscillating plates, and 6 is the zigzag zig zag plane shell fragments below outstanding limit, and wherein 5 is outboard ends that plane shell fragment exposes outstanding limit outer rim outer surface, forms the terminal 5 of loud speaker.6.1 is terminations that plane shell fragment exposes inner edge, outstanding limit lower surface, in order to connect voice coil loudspeaker voice coil.

Fig. 8 is that the present invention uses zigzag zig zag plane shell fragment as the part of voice coil leads, and replaces the outstanding limit of loudspeaker terminal, i.e. Fig. 7 scheme, for the schematic diagram of loud speaker.Wherein, 1 is outstanding limit, and 6 is the built-in zigzag zig zag plane shell fragments in outstanding limit, outstanding limit is stretched out in the termination, inner side 6.1 of 6, for connecting voice coil loudspeaker voice coil, the outboard end of 6 stretches out the upper surface of outstanding limit outer rim, forms terminal 5, replace the terminal of traditional loud speaker, can connect external circuit as power amplifier etc., 5 forms that can be designed as needs, as contact pin, jack, weld tabs etc.3 is voice coil loudspeaker voice coils, and 4 is voice coil leads, and 7 is audio amplifier wiring, and 10 is audio amplifier external spaces, and 11 is spaces in audio amplifier.So font zig zag plane shell fragment serves the effect of part voice coil leads, is designed with the effect played the same tune on different musical instruments with being woven by bright and beautiful silk thread, omits the height that lead-in wire needs to consider, also need not worry the problem of routing into bullet ripple.Voice coil loudspeaker voice coil Wire stick is combined in oscillating plate surface simultaneously, no longer significantly vibrates, thus can reduce wire diameter, reduces oscillating mass, reduces lead-in wire to the symmetric impact of vibrational system simultaneously.

Fig. 9 is the schematic diagram that multiple zigzag zig zag plane shell fragment of the present invention synthesizes discrete component.Four zigzag zig zag plane shell fragments synthesize one, are made up of mould punching beryllium-bronze sheet or other endurance elastic sheet.

Embodiment

Embodiment 1

With reference to accompanying drawing 7 and Fig. 8 and Fig. 4, by four 0.1mm thick × the uniform external diameter that is cast in of the zigzag zig zag plane shell fragment of the wide beryllium-bronze tape of 2mm is that the rubber of 50mm hangs limit lower surface, wherein the outboard end of two beryllium bronze bands stretches out the upper surface of outstanding limit outer rim, form the pillar base type crimp type terminal 5 that two Φ 2 × 1mm are high, can power amplifier be connected.The lower surface of outstanding limit inward flange is stretched out in the termination, inner side of beryllium-bronze plane shell fragment, forms the wiring position 6.1 that the wide 5mm of 2mm is high, for welding voice coil loudspeaker voice coil wire.Voice coil loudspeaker voice coil wire is to the lower surface of oscillating plate on speech coil framework, and be glued on the lower surface of oscillating plate, at the edge of oscillating plate, voice coil loudspeaker voice coil wire bonds is on the wiring position, inner side 6.1 of beryllium-bronze.So, make two inches of loud speakers, thickness much smaller than conventional design, and without the worry of bright and beautiful silk thread routing.And zig zag plane shell fragment strengthens horizontal centering ability in a zigzag, bass has clear improvement, and distortion reduces.And be positioned at the terminal of loud speaker upper surface, can be as shown in Figure 8, directly at audio amplifier space outerpace 10 internal wiring, do not need after the internal wiring of audio amplifier inner space 11, to pass audio amplifier wall as shown in Figure 3 as traditional design, form the through wires hole 9 on tank wall, air-tightness must be carried out to through wires hole 9 and mend glue or other encapsulation process, prevent gas leakage, operate more difficult.The design's easy-to-connect, can not destroy the air-tightness of audio amplifier, also need not worry the problem of the bad generation noise of cabling in audio amplifier.

Embodiment 2

With reference to figure 4, with mould, four zigzag zig zag plane shell fragments are cast in rubber and hang in limit, form the outstanding limit with four plane shell fragments as shown in Figure 4.Edge gluing will be hanged on plate vibration plate, form the passive radiator with the outstanding limit that plane shell fragment is strengthened.Actual use, successful, the tonequality of replaying bass significantly promotes, and distortion obviously reduces.

Although above embodiment hangs limit for circle, obviously the present invention can be used in the design on any non-circular outstanding limit, as track type, on the outstanding limit of ellipse and rectangle.The shape of the projection on outstanding limit can be any curved surface simultaneously, and being not limited to semicircle shape, also can be ellipse, parabola etc.And the pattern of plane shell fragment can be the plane shell fragment of any known similar functions or the design of dish bullet ripple.

Claims (5)

1. the outstanding limit for loud speaker or passive radiator, it is characterized in that, at the lower surface on outstanding limit, have more than one reinforcement to hang zigzag plane shell fragment that core ability is determined on limit, two terminations of plane shell fragment are fitted in inner edge and the outer rim on outstanding limit respectively, and be flexuose tortuous tape between the two ends of plane shell fragment, plane shell fragment makes outstanding limit have anisotropic compliance, namely axial compliance is large, and lateral complication is little.

2. outstanding limit according to claim 1, be further characterized in that, the lower surface on outstanding limit is stretched out at the two ends of the zigzag plane shell fragment be made up of endurance conductors such as beryllium-bronzes, form two wiring positions, connect terminal and the voice coil loudspeaker voice coil of loud speaker respectively, the signal of telecommunication arrives voice coil loudspeaker voice coil via terminal, in a zigzag plane shell fragment.

3. outstanding limit according to claim 1, be further characterized in that, described zigzag plane shell fragment is made up of endurance conductors such as beryllium-bronzes, the outboard end of plane shell fragment exposes the upper surface of the outer rim on outstanding limit in a zigzag, form the terminal of loud speaker, the signal of telecommunication arrives voice coil loudspeaker voice coil through the outboard end of zigzag plane shell fragment, in a zigzag plane shell fragment.

4. outstanding limit according to claim 1, is further characterized in that, described more than one zigzag plane shell fragment can be suppressed by mould, makes the plane shell fragment of the disjunctor of integration.

5. outstanding limit according to claim 1, is further characterized in that, the tortuous tape of zigzag of described zigzag plane shell fragment can be substituted by zigzag pattern or the style of other common plane shell fragment any.