CN102082986B - Voice coil and electrodynamic speaker using same - Google Patents
Voice coil and electrodynamic speaker using same Download PDFInfo
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- CN102082986B CN102082986B CN200910226364.0A CN200910226364A CN102082986B CN 102082986 B CN102082986 B CN 102082986B CN 200910226364 A CN200910226364 A CN 200910226364A CN 102082986 B CN102082986 B CN 102082986B
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention provides a voice coil and an electrodynamic speaker. The electrodynamic speaker uses the tabulate voice coil in scroll direction vertical to the vibrating direction of a speaker vibration plate and is long and thin with short diameter being smaller than the long diameter. The electrodynamic speaker has superior voice reproduction capacity and is suitable for being mounted on equipment such as a display. The voice coil is formed by bonding end surfaces of the first and second coils as the tabulate hollow coils by way of making the first coil and second coils consistent with respective scrolls and connecting the bonded first and second coils in series or in parallel by way of flowing voice signal current in a same direction. The hollow coil is formed by winding the flat wire in multiple layers in a non-staggered manner relative to the scrolls and comprises a reinforcing board which is accommodated in an internal peripheral space regulated by an internal peripheral end part formed by bonding the first and second coils. The internal peripheral end part is matched with the external peripheral end part.
Description
Technical field
The present invention relates to the short longilineal voice coil loudspeaker voice coil in a kind of minor axis direction ratio major diameter direction and dynamic speaker.Particularly relate to a kind of sound reproducing capability superior, be applicable to the voice coil loudspeaker voice coil be installed on the equipment such as display and the dynamic speaker using this voice coil loudspeaker voice coil.
Background technology
In the past, in the stereo set installing the display of loud speaker that sound is reproduced etc., required that the space of installing required for loud speaker was miniaturized.Particularly, seeking in longilineal dynamic speaker, due to the structure of magnetic circuit, making elongated shape and there is restriction.In addition, the dynamic speaker of elongated shape (rectangle, Long Circle (comprising ellipse, track type)), when utilizing the oscillating plate area loud speaker magnetic circuit that magnetic flux density that is limited, magnetic gap is high on minor axis direction, the width of magnetic circuit is wider than speaker diaphragm, miniaturization can not be realized, due to above a variety of causes, there is disadvantage in sound reproducing capability.Therefore, the dynamic speaker of various loud speaker magnetic circuit and this loud speaker magnetic circuit of use was proposed to address these problems in the past.
In the past, in order to realize the slimming of dynamic speaker, there is the loud speaker of the actuating force conducting parts possessing the tabular being formed with voice coil loudspeaker voice coil.Such as there is such loud speaker, namely, comprise framework, fixing magnetic circuit on said frame, oscillating plate is on said frame fixed in the mode that can vibrate in the prescribed direction, the actuating force conducting parts be combined with described oscillating plate and the damper supporting described actuating force conducting parts, described magnetic circuit configurations is between the first plane and the second plane, described first plane definition is parallel with described oscillating plate and contacts the plane at least partially of described magnetic circuit, described second plane definition is parallel with described oscillating plate and contacts the plane at least partially of described magnetic circuit, described actuating force conducting parts has the region being formed with voice coil loudspeaker voice coil, the actuating force of the described prescribed direction produced by the electric current flowing into described voice coil loudspeaker voice coil and the effect of magnetic flux that provided by described magnetic circuit is passed to described oscillating plate by described actuating force conducting parts, the position between described first plane and described second plane is combined with described actuating force conducting parts for one end of described oscillator, the position between described first plane and described second plane is combined with described framework (patent documentation 1) for the other end of described oscillator.
In addition, as the loud speaker of actuating force conducting parts with the tabular being formed with voice coil loudspeaker voice coil, such as there is such plane and drive loud speaker, namely, by plane vibration plate, make direction, face be arranged on the back side of this plane vibration plate and the drive plate being formed with coil with plane and being formed the magnet that the coil of this drive plate applies magnetic field along direction of vibration, this drive plate is the printing distributing board (with reference to patent documentation 2) that printing forms coil.
In addition, also square dynamic loudspeaker is had, namely, not there is the actuating force conducting parts of tabular, at the central portion of rectangle or oblong oscillating plate, the voice coil loudspeaker voice coil that the flatwise coil with opposite linearity two sides is formed engages with oscillating plate to make the linearity side of one side relative to the mode of this oscillating plate substantial orthogonality, configures magnetic circuit (with reference to patent documentation 3) in the mode vertical with coil flat horizontal surface with the magnetic flux that this voice coil loudspeaker voice coil links.Or, there is such speaker unit, namely, be provided with: in the prescribed direction can quiveringly by the oscillating plate supported, the voice coil loudspeaker voice coil that the pair of magnets of opposite configuration on the direction vertical with the direction of vibration of the above-mentioned oscillating plate direction parallel with the opposite direction with above-mentioned pair of magnets reels for spool direction, the electric current of above-mentioned voice coil loudspeaker voice coil is engaging with above-mentioned oscillating plate with the part flowed in said reel direction and the vertical direction of above-mentioned direction of vibration, the part configuration opposite with above-mentioned pair of magnets (with reference to patent documentation 4) that electric current flows at other direction.
Patent documentation 1: Japan Patent No. 3891481 publication (Fig. 1 ~ Figure 11)
Patent documentation 2: Japanese Unexamined Patent Publication 58-48194 publication (Fig. 1 ~ Fig. 3)
Patent documentation 3: Japanese Unexamined Patent Publication 59-189398 publication (Fig. 1 ~ Fig. 3)
Patent documentation 4: Japanese Unexamined Patent Publication 2007-129665 publication (Fig. 1 ~ Fig. 9)
But, in the longilineal dynamic speaker that minor axis direction ratio major diameter direction is short, when comprising the planar coil configured in the mode that the spool direction of coil is vertical with the direction of vibration of speaker diaphragm, such as, when having the actuating force conducting parts of the such tabular of above-mentioned patent documentation 1, the weight easily producing speaker vibration system increases and the magnetic flux density of magnetic gap of linearity reduces, as the problem such as reproduction energy rate reduction of the loud speaker of producing sound.On the other hand, such as, when not there is above-mentioned patent documentation 4 such tabular actuating force conducting parts, there is such problem, that is, to be configured in flatwise coil magnetic circuit magnetic gap on the actuating force of partial action, because the rigidity of flatwise coil is not enough, can not fully pass to the speaker diaphragm engaged with flatwise coil, high pass cut off frequency reduces, and can not guarantee sufficient audio reproduction frequency band, as a result, the dynamic speaker that sound reproducing capability is poor is become.
Summary of the invention
The present invention researches and develops in order to the problem solving above-mentioned prior art and have, its object is to provide a kind of voice coil loudspeaker voice coil and dynamic speaker, this dynamic speaker uses to have the axial flat coil of the volume vertical relative to the direction of vibration of speaker diaphragm and the short elongated shape dynamic speaker in minor axis direction ratio major diameter direction, sound reproducing capability is outstanding, is applicable to being installed on the equipment such as display.
Voice coil loudspeaker voice coil of the present invention, by respective coil end face is bonded to each other in the mode that respective spool is consistent with the second coil and is formed by the first coil as flat hollow coil, and by the first bonded coil and the second coil are connected in series in the mode that voice signal electric current flows in the same direction or are connected in parallel and are formed, this hollow coil is by pretty good turning up the soil lenticular wire multilayer-wound and being formed relative to spool, comprise stiffener, it is housed in the first coil and the second coil bonds and the inner circumferential space of the inner peripheral end thereof defined of formation, and the peripheral end of this stiffener coordinates with inner peripheral end thereof.
Voice coil loudspeaker voice coil of the present invention, by respective coil end face is bonded to each other in the mode that respective spool is consistent with the second coil and is formed by the first coil as flat hollow coil, and by the first bonded coil and the second coil are connected in series in the mode that voice signal electric current flows in the same direction or are connected in parallel and are formed, this air core coil is by pretty good turning up the soil lenticular wire multilayer-wound and being formed relative to spool, comprise stiffener, its peripheral end and bonding the first coil and the second coil and the inner peripheral end thereof that formed coordinates, the Thickness Ratio of this stiffener is little by the voice coil loudspeaker voice coil gauge of the thickness defined bonding the first coil and the second coil.
Voice coil loudspeaker voice coil of the present invention, the inner peripheral end thereof of the second coil has the internal diameter size larger than the internal diameter size of the inner peripheral end thereof of the first coil, bonds the first coil and the second coil and the inner peripheral end thereof of the voice coil loudspeaker voice coil formed comprises cooperation stage portion joined together by stiffener.
Preferably, voice coil loudspeaker voice coil of the present invention, second coil reduces more than 1 circle by the coiling of the inner peripheral end thereof by the flat hollow coil identical with the first coil turn and is formed, and the inner peripheral end thereof of the second coil has the internal diameter size larger than the internal diameter size of the inner peripheral end thereof of the first coil.
More preferably, voice coil loudspeaker voice coil of the present invention, stiffener comprises the cooperation stage portion coordinating stage portion to coordinate with the inner peripheral end thereof of voice coil loudspeaker voice coil at its peripheral end.
In addition, voice coil loudspeaker voice coil of the present invention, stiffener is formed by resin or nonmagnetic metal.
Preferably, voice coil loudspeaker voice coil of the present invention, first coil and the second coil are formed as comprising the run-track shaped of one group of line part and one group of arc sections or comprise the rectangular-shaped of two groups of line parts, and the peripheral end of stiffener comprises the one group of line part at least coordinated with one group of line part of the first coil and the second coil.
Dynamic speaker of the present invention, comprising: above-mentioned voice coil loudspeaker voice coil; The speaker diaphragm linked with voice coil loudspeaker voice coil; There is the magnetic circuit of the magnetic gap of the linearity of configuration voice coil loudspeaker voice coil; The framework linked with magnetic circuit; The edge of peripheral end framework supporting speaker diaphragm is fixed on peripheral end.
Preferably, dynamic speaker of the present invention, also comprises inner peripheral portion and voice coil loudspeaker voice coil links, peripheral part links with framework or magnetic circuit damper.
Below, effect of the present invention is described.
Voice coil loudspeaker voice coil of the present invention is the voice coil loudspeaker voice coil formed being bonded to each other by respective coil end face in the mode that respective spool is consistent as two the first coils of flat hollow coil with the second coil, and this hollow coil is by pretty good turning up the soil the lenticular wire (comprising square line (angle Line), square line (true corner Line), rectangular lines (ェ ッ ジ ヮ ィ ズ Line)) with rectangular section multilayer-wound and being formed relative to spool.The first coil bonded by bonding agent or paint vehicle etc. and the second coil are connected in series in the mode that voice signal electric current flows in the same direction or are connected in parallel.Therefore, voice coil loudspeaker voice coil of the present invention is formed as the thin tabular that thickness is the twice degree of the thickness size of lenticular wire.Although lenticular wire is had bendingly separately separately hold yielding problem relative to pretty good turn up the soil the first coil of multilayer-wound and the second coil of spool, but as voice coil loudspeaker voice coil of the present invention, respective voice coil loudspeaker voice coil end face is bonded to each other, then can prevent distortion, keep smooth tabular.
Its overall dimensions of voice coil loudspeaker voice coil is formed as longilineal run-track shaped or rectangular-shaped, and one is partly arranged in the magnetic gap of the linearity of magnetic circuit, then can realize the longilineal dynamic speaker that minor axis direction ratio major diameter direction is short.In addition, dynamic speaker of the present invention has the speaker diaphragm linked with voice coil loudspeaker voice coil, the framework linked with magnetic circuit and on framework, fixes its peripheral end to support the edge of the peripheral end of speaker diaphragm, preferably, be provided with inner peripheral portion and voice coil loudspeaker voice coil links, the damper that peripheral part links with framework or magnetic circuit.
As the first coil of flat hollow coil and the second coil owing to being formed as run-track shaped or rectangular-shaped, so the inner circumferential space of inner peripheral end thereof defined that the voice coil loudspeaker voice coil their bondings formed has the first coil and the bonding of the second coil and formed.Voice coil loudspeaker voice coil of the present invention comprises and is housed in this inner circumferential space and the stiffener that coordinates with inner peripheral end thereof of peripheral end.The Thickness Ratio of the stiffener of this voice coil loudspeaker voice coil is little by the voice coil loudspeaker voice coil gauge of the thickness defined bonding the first coil and the second coil, not outstanding from inner circumferential space.That is, the gauge of stiffener specific adhesion first coil of this voice coil loudspeaker voice coil and the voice coil loudspeaker voice coil of the second coil is little, so the inner circumferential space do not specified from the inner peripheral end thereof of voice coil loudspeaker voice coil is accommodated wherein highlightedly, strengthens voice coil loudspeaker voice coil.Voice coil loudspeaker voice coil be formed as comprising the run-track shaped of one group of line part and one group of arc sections or comprise two groups of line parts rectangular-shaped in any one shape, the peripheral end of stiffener comprises the one group of line part at least coordinated with one group of line part of the first coil and the second coil.
Therefore, in voice coil loudspeaker voice coil of the present invention, can improve rigidity by arranging this stiffener, the actuating force acted in the part in the magnetic gap of the magnetic circuit being configured in voice coil loudspeaker voice coil fully passes to the speaker diaphragm linked with voice coil loudspeaker voice coil.Its result, uses the dynamic speaker of this voice coil loudspeaker voice coil to improve high pass cut off frequency, guarantees wide audio reproduction frequency band.In addition, stiffener is formed by resin or nonmagnetic metal, can realize with the minimum volume that can be housed in inner circumferential space, so can lightweight be realized, in addition, the size wider than the magnetic gap size of the linearity of the gauge being suitable for voice coil loudspeaker voice coil need not be formed, so high magnetic flux density can be guaranteed.Therefore, it is possible to improve audio reproduction energy rate, form the dynamic speaker that sound reproducing capability is superior.In addition, stiffener, owing to can improve the rigidity of voice coil loudspeaker voice coil, can not bend and the advantage of being out of shape so have flat voice coil loudspeaker voice coil.
In addition, in voice coil loudspeaker voice coil of the present invention, run-track shaped or rectangular-shaped inner peripheral end thereof can comprise the cooperation stage portion joined together by stiffener.Specifically, if the inner peripheral end thereof of the second coil has the large internal diameter size of the internal diameter size of the inner peripheral end thereof of the first coil of specific adhesion, then within it peripheral end portion forms the cooperation stage portion joined together by stiffener.When the second coil reduces more than 1 circle by the coiling of the inner peripheral end thereof making the flat hollow coil identical with the first coil turn and formed, cooperation stage portion joined together by stiffener can be formed by the difference of the internal diameter size of the difference based on these numbers of turn.
In addition, the stiffener of voice coil loudspeaker voice coil of the present invention, can containing the cooperation stage portion coordinating stage portion to coordinate with the inner peripheral end thereof of voice coil loudspeaker voice coil at its peripheral end.Having at peripheral end coordinates the stiffener of stage portion can by easily being formed by ester moulding or by nonmagnetic metal drawings such as aluminium etc.Having at peripheral end coordinates the stiffener of stage portion owing to all coordinating with the inner peripheral end thereof of the first coil and the inner peripheral end thereof of the second coil, so can improve the installation accuracy of stiffener, improves rigidity further.Therefore, voice coil loudspeaker voice coil of the present invention can obtain the raising of reproduction energy rate and the balance of thin-long of the dynamic speaker using this voice coil loudspeaker voice coil, can realize reproducing the outstanding dynamic speaker of tonequality.
Invention effect
The present invention can provide a kind of use to have the dynamic speaker of the volume axial planar coil vertical relative to the direction of vibration of speaker diaphragm, particularly, there is lenticular wire pretty good to turn up the soil multilayer-wound and the run-track shaped coil formed and the short elongated shape dynamic speaker in minor axis direction ratio major diameter direction relative to spool direction, its sound reproducing capability is superior, is applicable to being installed on the loud speaker magnetic circuit on the equipment such as display and dynamic speaker.
Accompanying drawing explanation
Fig. 1 is the figure of the dynamic speaker 1 that the preferred embodiment of the present invention is described.(embodiment 1)
Fig. 2 is the enlarged fragmentary cross section of the structure of the dynamic speaker 1 that the preferred embodiment of the present invention is described.(embodiment 1)
Fig. 3 is the figure of the voice coil loudspeaker voice coil 4 that the preferred embodiment of the present invention is described.(embodiment 1)
Fig. 4 is the profile of the structure of the voice coil loudspeaker voice coil 4A that another preferred implementation of the present invention is described.(embodiment 2)
Fig. 5 is the profile of the structure of the voice coil loudspeaker voice coil 4B that another preferred implementation of the present invention is described.(embodiment 3)
Fig. 6 is the profile of the voice coil loudspeaker voice coil 40 that comparative example is described.(comparative example)
Fig. 7 is the curve chart of the sound pressure frequency characteristic of the dynamic speaker using the voice coil loudspeaker voice coil 4A of embodiment, the voice coil loudspeaker voice coil 40 of comparative example.(embodiment 2, comparative example).
1 dynamic speaker
2 speaker diaphragms
3 edges
4,4A, 4B, 40 coils
41,41a coil
42,42a coil
43,43a, 43b stiffener
5 dampers
6 frameworks
10 magnetic circuits
11,12 yokes
13 magnets
Embodiment
Below, voice coil loudspeaker voice coil preferred embodiment of the present invention and dynamic speaker are described, but the present invention is not limited to these execution modes.
(embodiment 1)
Fig. 1 and Fig. 2 is the figure of the dynamic speaker 1 that the preferred embodiment of the present invention is described.In addition, Fig. 3 is the figure of the voice coil loudspeaker voice coil 4 that the preferred embodiment of the present invention is described.Specifically, Fig. 1 is the stereogram observing dynamic speaker 1 from front face side, and Fig. 2 is the partial enlarged drawing of the section in the minor axis direction of dynamic speaker 1.Fig. 3 (a) is the side view observing voice coil loudspeaker voice coil 4 from minor axis direction, and Fig. 3 (b) is the C-C ' profile of voice coil loudspeaker voice coil 4, and Fig. 3 (c) is the stereogram of voice coil loudspeaker voice coil 4, and Fig. 3 (d) is the expanded view of the structure that voice coil loudspeaker voice coil 4 is described.In addition, as described later, the omission such as structure and internal structure of a part for dynamic speaker 1.In addition, the direction that the straight line (major axis) of point of contact A-O-A ' extends is major diameter direction, and in addition, the direction that the straight line (minor axis) of point of contact B-O-B ' extends is minor axis direction.
The dynamic speaker 1 of the present embodiment is for having the longilineal dynamic speaker that major diameter direction length L1 is about 135.6mm, minor axis direction length L2 is about the speaker diaphragm 2 of the track type of 10mm, although be elongated shape, also there is the oscillating plate area that the circular vibration plate that is about 35mm with bore is equal.Speaker diaphragm 2 is supported in its outer circumference end by edge 3, and the outer circumference end at edge 3 is fixed on framework 6.In addition, link coil 4 at the central portion of speaker diaphragm 2 from rear side, the damper 5 that coil 4 is fixed on framework 6 by outer circumferential side supports and can vibrate.The coil 4 of the present embodiment is the coil of track type, is on the direction that the direction of vibration vibrated relative to speaker diaphragm 2 is substantially vertical, have the axial flat coil of volume.In addition, framework 6 is the elongated shape corresponding with the speaker diaphragm 2 of track type, to be housed on framework 6 fixing magnetic circuit 10 and also to have the narrow elongated shape of the width of minor axis direction below length L2.Therefore, the little equipment of the width of loud speaker is installed in the side etc. that dynamic speaker 1 is the display part being suitable for the equipment such as display and having.Install (not shown) joint 7 of supply voice signal electric current in the rear side of framework 6, a part for magnetic circuit 10 is exposed.
The speaker diaphragm 2 of dynamic speaker 1, in the inner circumferential side of its outer circumference end bonded edge 3, in addition, entreats the back side wherein, and the linking part of the line part 4b inserted into gap shape of a side of run-track shaped coil 4 described later is also thereon bonding by bonding agent.Speaker diaphragm 2 is formed in order to the lightweight realizing speaker diaphragm is shaped at the hot castable resin of bubbling.When the present embodiment, be extruded the hot castable resin foaming sheet material of mould-forming (specifically, polystyrene sheet material) by adopting and having used the vacuum forming process of plug forming (プ ラ グ ァ シ ス ト is shaped), obtain the irregular speaker diaphragm 2 of tool.Namely, the longilineal speaker diaphragm 2 that major diameter direction length L1 is significantly different with minor axis direction length L2, impact due to the diaphagras in major diameter direction easily becomes remarkable, so be formed as minor axis directional profile shape to comprise the shape of roughly U-shaped, form major diameter direction and there is rigid shape.
Edge 3 has flexible blistered rubber by injection in metal pattern in the present embodiment and heating is bubbled and formed.On the major diameter direction of speaker diaphragm 2 with linearity extend track type long limit and formed on the minor face of track type of arc-shaped on minor axis direction, form the free margins be made up of the ripple (or crimping) that wall is thin, with free end bearing speaker diaphragm 2.In addition, on the minor face of track type, the edge in arc-shaped on minor axis direction also can form wall thickness and the fixed edge of not free vibration, with fixed bearing speaker diaphragm 2.Its result, the compliance of the free edge of longilineal speaker diaphragm 2 due to edge 3 on minor axis direction is supported by softness, can flexural vibrations due to the flexibility of the foaming sheet material of the hot castable resin of formation speaker diaphragm 2 on major diameter direction.
Coil 4 has accordingly with magnetic circuit 10 described later to roll up axial flat coil on the direction that the direction of vibration vibrated relative to speaker diaphragm 2 is substantially vertical, is major diameter direction length is about 36.2mm, minor axis direction length is about 8.2mm track type, thickness 4t is about the coil of 0.5mm.Specifically, coil 4 comprises pretty good to turn up the soil the copper strap wire of thickness size 0.12mm × 0.20mm multilayer-wound relative to spool, thickness (41t or 42t=is about 0.25mm) is roughly equal with the thickness size of lenticular wire, and volume layer gauge is about the coil 41 and 42 being formed as flat two hollows and the stiffener described later 43 of 2.3mm.The coil 41 and 42 forming the coil 4 of the present embodiment is respectively the coil of equal turn numbers.Coil 4 is formed to make coil 41 mode consistent with the spool of 42 be bonded to each other by respective coil end face by bonding agent (or paint vehicle), and is connected with the mode tandem of the voice signal electric current that flows in the same direction with 42 by the coil 41 of bonding and is formed.Coil 41 and 42 due to lenticular wire pretty good to be turned up the soil multilayer-wound relative to spool, although so exist and bendingly separately separately hold yielding problem, respective coil end face is bonded to each other, distortion can be prevented, keep smooth tabular.
In the run-track shaped coil 4 of bonding coil 41 and 42, form the line part 4a of a side, line part 4b, the arc sections 4c of a side of the opposing party and the arc sections 4d of the opposing party, form the inner circumferential space 4f as run-track shaped hole in the inner circumferential side of run-track shaped inner peripheral end thereof 4e.Therefore, in coil 4, the peripheral end 43e being housed in the stiffener 43 of this inner circumferential space 4f coordinates with run-track shaped inner peripheral end thereof 4e.It is bonding that the peripheral end 43e of stiffener 43 and the run-track shaped inner peripheral end thereof 4e of coil 4 join merga pass bonding agent.Namely, the peripheral end 43e of stiffener 43 coordinates with the inner peripheral surface of the coiling of the most inner circumferential side of coil 41 and 42.The stiffener 43 of the present embodiment is the aluminium sheet that thickness 43t is about 0.4mm, in the track type that major diameter direction length is about 31.5mm, minor axis direction length is about 3.5mm.The thickness 43t of stiffener 43 due to the voice coil loudspeaker voice coil gauge 4t of the thickness defined of specific adhesion coil 41 and 42 little, so stiffener 43 is not given prominence to from the inner circumferential space 4f of coil 4.Stiffener 43 due to the rigidity of coil 4 can be improved, so suppress flat coil 4 to bend such distortion.In addition, stiffener 43 can be made up of nonmagnetic metal such as copper, hard aluminum or aluminum alloy, but also can be formed by synthetic resin such as ABS, PI, PET.
Damper 5 arranges cut out portion (slotted section) on laminal resin plate, comprise the inner side fixed part linked with coil 4, the outside fixed part linked with framework 6 and the damper of the movable part of the arm of fixed part and outside fixed part inside linking.Specifically, damper 5, for thickness being about the PC resin plate punch process of 0.2mm and the parts that formed, has the gap of inserting the arc sections 4c of coil 4 or the stiffener 43 of arc sections 4d and coil 4 and being fixed at inner side fixed part.Damper 5 is linked by bonding agent and coil 4 or framework 6.In addition, damper 5 can be the damper formed by resin injection molding, in addition, also can be the fabric with flexible fiber for base material carrys out impregnated phenolic resin and be shaped.
Framework 6 be with the shape of speaker diaphragm 2 accordingly injection molding be longilineal basket resin, there is the installing hole of the substantially rectangular fixed part of built-in edge 3, the fixed part of fixing magnetic circuit 10, the linking part linking these fixed parts, the window portion specified between multiple linking part and (not shown) erection joint.Therefore, the speaker vibration system be made up of speaker diaphragm 2, edge 3, coil 4 and damper 5 can be supported quiveringly relative to framework 6 and magnetic circuit 10.In addition, framework 6 also can be the metal framework carrying out drawing to steel plate and formed.
Magnetic circuit 10 by formed linearity magnetic gap 14 yoke 11 and 12, by yoke 11 and 12 clamp the bar-shaped magnet 13 with rectangular section form.The magnet 13 of the present embodiment is bar-shaped rare earth element magnet, is magnetized to each plane linked from yoke 11 or 12 and has different magnetic poles, so produce the magnetic field of high magnetic flux density in the magnetic gap 14 of linearity.The each parts forming magnetic circuit 10 are fixed by bonding agent.In addition, magnetic circuit 10 is also fixed on by bonding agent on the fixed part of framework 6.Magnetic circuit 10 has the elongated shape magnetic circuit that major diameter direction length is about 31.0mm, minor axis direction length is about the overall dimension of 5.7mm, there is the size that can be housed in the inner side of framework 6 when roughly its entirety is observed above, so, dynamic speaker 1 thin-long can be made.In addition, as long as magnetic circuit 10 is at the magnetic gap 14 forming linearity, the structure of the present embodiment is just not limited to.
In the dynamic speaker 1 of the present embodiment, coil 4 configures the line part 4a of a run-track shaped side at the magnetic gap 14 kinds of the linearity of magnetic circuit 10, and the line part 4b of the opposing party is attached at the central portion of speaker diaphragm 2.In addition, the arc sections 4c of a side and the arc sections 4d of the opposing party and stiffener 43 link damper 5 described later.In the present embodiment, two coils 41 and 42 forming the bonding of coil 4 are connected in series in the mode of the voice signal electric current that flows in a same direction each other in the part (the line part 4a of the line part 4a of a side of such as coil 41 and a side of coil 42) bonded.Certainly, coil 41 and 42 also can be connected in parallel.In addition, the wire (of (not shown) that be connected with coil 4 ?yarn Line) by (not shown) joint be fixed on framework 6 with weld from joint to the lead-out wire that coil 4 is drawn and make it conducting, acoustic current-meter is supplied to coil 4.Wherein, wire also can by arranging grommets and conducting to joint on speaker diaphragm 2.
When supplying voice signal electric current to the coil 4 on dynamic speaker 1, to be configured at magnetic circuit 10 linearity magnetic gap 14 in the line part 4a effect actuating force of a side of coil 4.This coil 4, by arranging the above-mentioned stiffener 43 be engaged between the line part 4a of a side and the line part 4b of the opposing party, is strengthened coil 41 and 42 and is improved rigidity.Therefore, actuating force in the part (the line part 4a of a side of coil 4) in the magnetic gap 14 of the magnetic circuit 10 being configured in coil 4 is acted on by the speaker diaphragm 2 fully passed on the line part 4b of the opposing party being attached at coil 4.Its result, uses the dynamic speaker 1 of this coil 4 to improve high pass cut off frequency, guarantees wide audio reproduction frequency band.
In addition, stiffener 43 is made up of resin or nonmagnetic metal, owing to can realize with the minimum volume be housed in inner circumferential space, so can lightweight be realized, in addition, need not be larger than the magnetic gap size of the linearity of the gauge 4t of applicable coil 4, high magnetic flux density can be guaranteed.The stiffener 43 of the present embodiment is the run-track shaped flat board of handling ease, but also can arrange through hole or thinning, to realize lightweight.Therefore, it is possible to raising Sound reproduction efficiency, form the dynamic speaker 1 that sound reproducing capability is superior.
(embodiment 2)
Fig. 4 illustrates to replace the coil 4 of preceding embodiment to form the figure of another coil 4A of dynamic speaker 1, the C-C ' profile suitable with Fig. 3 (b) of preceding embodiment.The coil 4A of the present embodiment is that to have the structure same with the coil 4 of preceding embodiment, comprise coil 41a and 42a of two hollows and stiffener 43a described later, have the shape of roughly the same overall dimension be flat coil.Wherein, coil 4A is different from the coil 4 of preceding embodiment in the different this point of size forming the size 41r of inner peripheral end thereof of coil 41a of hollow of a side of run-track shaped inner peripheral end thereof 4e, size 42r, the thickness 43t of stiffener 43a of the inner peripheral end thereof of the coil 42a of the hollow of the opposing party, the peripheral end 43e of stiffener 43a.Therefore, common part uses identical Reference numeral, it illustrates omission.
Coil 4A is formed to make the consistent mode of the spool of coil 41a with 42a be bonded to each other by respective coil end face by bonding agent (or paint vehicle).The copper strap wire that thickness is of a size of 0.12mm × 0.20mm by coil 41a and 42a respectively not to stagger ground multilayer-wound relative to spool.Run-track shaped its number of turn of coil 41a is about 25 circles, and the size 41r as the inner peripheral end thereof of the distance of the inner circumferential space 4f specified between the line part 4a and the line part 4b of the opposing party of a side is about 3.5mm.In addition, run-track shaped its number of turn of coil 42a of the opposing party is about 22 circles, size 42r as the inner peripheral end thereof of the distance of the inner circumferential space 4f specified between the line part 4a and the line part 4b of the opposing party of a side is about 4.7mm, and the internal diameter size 42r of the inner peripheral end thereof of coil 42a is larger than the internal diameter size 41r of the inner peripheral end thereof of coil 41a.The number of turn of the inner peripheral end thereof of the flat hollow coil identical with the coil 41a number of turn is reduced by 3 circles and is formed by coil 42a.Its result, the inner peripheral end thereof 4e that the coil 4A of the present embodiment is formed to bond coil 41a and 42a and is formed comprises the cooperation stage portion joined together by stiffener 43.
Namely, the cooperation stage portion of the inner peripheral end thereof 4e of coil 4A is formed by the difference in size of internal diameter size 41r and 42r of coil 41a and the 42a inner peripheral end thereof separately bonded.When the coil utilizing the number of turn identical forms coil 41a and 42a, can by the coiling wraparound of the inner peripheral end thereof of the coil of a side to reduce more than 1 circle.Therefore, as shown in Figure 4, the stiffener 43a forming the coil 4A of the present embodiment coordinates the inner peripheral end thereof 4e of stage portion to coordinate with comprising of coil 4A.That is, the inner peripheral surface of the coiling of the peripheral end 43e of stiffener 43a and the coil end face of several circle coilings of the most inner circumferential side of coil 41a and the most inner circumferential side of coil 42b coordinates.
Stiffener 43a is only about half of, aluminium sheet that thickness 43t be about 0.2mm thinner than comparative example formerly, and be about 31.5mm in major diameter direction length, minor axis direction length is about the run-track shaped of 4.7mm.Because the voice coil loudspeaker voice coil gauge 42t of the Thickness Ratio coil 42a of the stiffener 43a of the present embodiment is little, so stiffener 43a does not give prominence to from the inner circumferential space 4f of coil 4A.Stiffener 43a due to the rigidity of coil 4 can be improved, so suppress flat coil 4 to bend such distortion.In addition, stiffener 43a improves rigidity, so the actuating force acted on the line part 4a of the side in the magnetic gap 14 of the magnetic circuit 10 being configured in coil 4A fully passes to the speaker diaphragm 2 on the line part 4b of the opposing party being attached at coil 4A owing to strengthening coil 41a and 42b.Its result, uses the dynamic speaker 1 of this coil 4A to improve high pass cut off frequency, guarantees wide audio reproduction frequency band.In addition, because stiffener 43a can be thin more only about half of than comparative example formerly, so lightweight can be realized further.If the lightweight of the speaker vibration system comprising coil 4A can be realized, then can improve Sound reproduction efficiency, the outstanding dynamic speaker of sound reproducing capability 1 can be realized.
(embodiment 3)
Fig. 5 illustrates that the coil 4A of the embodiment that can replace formerly forms the figure of another coil 4B of dynamic speaker 1, is the C-C ' profile suitable with Fig. 4 of embodiment formerly.The coil 4B of the present embodiment is that to have the structure identical with the coil 4A of embodiment formerly, comprise coil 41a and 42a of two hollows and stiffener 43b described later, have the shape of roughly the same overall dimension be flat coil.Wherein, coil 4B formed the size 41r of inner peripheral end thereof of coil 41a of hollow of a side of run-track shaped inner peripheral end thereof 4e, the inner peripheral end thereof of the coil 42a of the hollow of the opposing party size 42r different and consistent with the coil 4A of embodiment formerly on this aspect of cooperation stage portion forming inner peripheral end thereof 4e.On the other hand, the shape of the stiffener 43b of coil 4B is different from the shape of the stiffener 43a of the coil 4A in first embodiment.Therefore, common part uses identical Reference numeral, it illustrates omission.
Stiffener 43b is only about half of, aluminium sheet that thickness 43t be about 0.2mm thinner than the stiffener 43 of comparative example formerly, is about 31.5mm, minor axis direction length is about the run-track shaped of 4.7mm in major diameter direction length.In addition, stiffener 43b, as shown in the figure, comprises the cooperation stage portion coordinating stage portion to coordinate with the inner peripheral end thereof 4e of coil 4B at its peripheral end 43e.Namely, in the cooperation stage portion of the inner peripheral end thereof 4e of the coil 4B of coil 41a and 42a of formation two hollows, the corresponding cooperation stage portion be formed on the peripheral end 43e of stiffener 43b is combined with.Stiffener 43b, owing to forming the cooperation stage portion of standing shape on peripheral end 43e, so compare with the stiffener 43a of embodiment formerly, can improve rigidity further.
Like this, stiffener 43b, owing to improving the rigidity of coil 4B further, so flat coil 4 can be suppressed to bend such distortion, and can strengthen coil 41a and 42b and improve rigidity.Its result, in dynamic speaker 1, acts on the actuating force on the line part 4a of a side of the coil 4B in the magnetic gap 14 of the magnetic circuit 10 being configured in coil 4B, by the speaker diaphragm 2 fully passed on the line part 4b of the opposing party being attached at coil 4B.Use the dynamic speaker 1 of coil 4B can improve high pass cut off frequency further, guarantee wide audio reproduction frequency band.
The thickness 43t of the stiffener 43b of the present embodiment due to can the voice coil loudspeaker voice coil gauge 4t of thickness defined of specific adhesion coil 41a and 42a little, so the option of the material thickness of stiffener 43b increases, and can lightweight be realized simultaneously.Namely, if as shown in this embodiment, at the peripheral end 43e of stiffener 43b, cooperation stage portion is set, only make the voice coil loudspeaker voice coil gauge 42t of the Thickness Ratio coil 42a of the cooperation stage portion of the peripheral end 43e of stiffener 43b little, then the thickness 43t of the stiffener 43b of the present embodiment can select from the scope that voice coil loudspeaker voice coil gauge 42t is large, the thickness 4t of specific adhesion coil 41a and 42a is little than coil 42a.Like this, stiffener 43b gives prominence to due to the inner circumferential space 4f not from coil 4B, so in dynamic speaker 1b, need not widen the size of the magnetic gap 14 of the linearity of magnetic circuit 10, can guarantee high magnetic flux density.
Fig. 6 is the figure of the coil 40 that the comparative example corresponding with the coil 4 of embodiment is formerly described.Specifically, Fig. 6 (a) is the C-C ' profile suitable at Fig. 3 (b) of first embodiment with the coil 40 of comparative example, and Fig. 6 (b) is the stereogram of the coil 40 of comparative example.The coil 40 of comparative example compares with the coil 4 of embodiment formerly, is the voice coil loudspeaker voice coil without stiffener 43.Namely, the coil 40 of comparative example is that the coil 41 of flat two hollows by being formed as equal turn numbers respectively to be formed to make coil 41 mode consistent with the spool of coil 42 be bonded to each other by respective coil end face by bonding agent (or paint vehicle) with 42 and the coil 41 and 42 the bonded voice coil loudspeaker voice coil that is connected in series in the mode that voice signal electric current flows in the same direction and formed.
Therefore, the inner circumferential space 4f as run-track shaped hole is formed in the inner circumferential side of the run-track shaped inner peripheral end thereof 4e of the coil 40 of comparative example.The coil 40 of comparative example is not owing to having the stiffener improving rigidity, its result, in the dynamic speaker of coil 40 using comparative example, the actuating force acted on the line part 4a in the magnetic gap 14 of the magnetic circuit 10 being configured in coil 40 can not by the speaker diaphragm 2 fully passed on the line part 4b of the opposing party being attached at coil 40.
Fig. 7 is the curve chart of the sound press frequency characteristic of the dynamic speaker 1 using the voice coil loudspeaker voice coil 4A of embodiment and the voice coil loudspeaker voice coil 40 of comparative example.As shown by the solid line, use the dynamic speaker 1 of the coil 4A of embodiment to improve high pass cut off frequency, guarantee wide audio reproduction frequency band.On the other hand, shown in dotted line, in the dynamic speaker 1 of voice coil loudspeaker voice coil 40 using comparative example, high pass cut off frequency reduces, and produces high peak value, can not guarantee wide audio reproduction frequency band near about 6kHz.
Use the coil 4 of embodiment, the dynamic speaker 1 of 4A or 4B that coil is provided with stiffener, so the rigidity of voice coil loudspeaker voice coil improves, comprise the Stability Analysis of Structures of the vibrational system of speaker diaphragm 2.Its result, even the longilineal dynamic speaker that the action of the dynamic speaker of the present embodiment 1 vibrational system is easily unstable, also can suppress voice coil loudspeaker voice coil contact the magnetic gap 14 of magnetic circuit 10 and produce the problem that noise causes action failure such.
In the coil 4,4A or 4B of embodiment, the inner peripheral end thereof 4e of stiffener 43,43a or 43b and coil run-track shaped is formed run-track shaped accordingly.Wherein, stiffener can be the rectangular-shaped of the link run-track shaped line part 4a of a side and the line part 4b of the opposing party.Stiffener also can be other shapes corresponding with the shape of the inner peripheral end thereof of coil, and such as, when coil is rectangular-shaped, the stiffener improving rigidity further also can be rectangular-shaped.
In addition, in above-mentioned dynamic speaker 1, flat coil 4 is supported by the damper 5 be integrally formed and can vibrate, but also can be the damper 5 of other modes.Such as, damper 5 can be the damper that the end side in the major diameter direction of coil 4 can be vibrated by damper 51 and 52 supporting of other modes, and damper 5 also can not be able to be arranged under repressed situation in rocking of coil 4.
(utilizability in industry)
Dynamic speaker of the present invention as the loudspeaker applications be built in the images such as display, stereo set, also can not only can be applied in the game machine such as electronic game machine, vending machine establishing the casing of the loud speaker of producing sound in having.In addition, the dynamic speaker with loud speaker magnetic circuit of the present invention due to the speaker system of little with overall width, small-sized and slim casing producing sound can be realized, so be particularly suitable for the limited for motor vehicle loud speaker of installation space.
Claims (9)
1. a voice coil loudspeaker voice coil, by respective coil end face is bonded to each other in the mode that respective spool is consistent with the second coil and is formed by the first coil as flat hollow coil, and by this bonded first coil and this second coil are connected in series in the mode that voice signal electric current flows in the same direction or are connected in parallel and are formed, described hollow coil is by pretty good turning up the soil lenticular wire multilayer-wound and being formed relative to described spool
Comprise stiffener, it is housed in and is bonded to each other by the coil end face of this first coil and this second coil and the inner circumferential space of inner peripheral end thereof defined that formed, and the peripheral end of this stiffener coordinates with described inner peripheral end thereof,
Described voice coil loudspeaker voice coil is when dynamic speaker uses, and the coil in described voice coil loudspeaker voice coil has the axial flat coil of the volume vertical relative to the direction of vibration of speaker diaphragm.
2. a voice coil loudspeaker voice coil, by respective coil end face is bonded to each other in the mode that respective spool is consistent with the second coil and is formed by the first coil as flat hollow coil, and by this bonded first coil and this second coil are connected in series in the mode that voice signal electric current flows in the same direction or are connected in parallel and are formed, described hollow voice coil loudspeaker voice coil is by pretty good turning up the soil lenticular wire multilayer-wound and being formed relative to described spool
Comprise stiffener, the peripheral end of this stiffener with the coil end face of this first coil and this second coil to be bonded to each other and the inner peripheral end thereof that formed coordinates, the Thickness Ratio of this stiffener is little with the gauge of this voice coil loudspeaker voice coil of the thickness defined of this second coil by bonding this first coil
Described voice coil loudspeaker voice coil is when dynamic speaker uses, and the coil in described voice coil loudspeaker voice coil has the axial flat coil of the volume vertical relative to the direction of vibration of speaker diaphragm.
3. voice coil loudspeaker voice coil as claimed in claim 1 or 2, is characterized in that:
The inner peripheral end thereof of described second coil has the internal diameter size larger than the internal diameter size of the inner peripheral end thereof of described first coil, bonds this first coil and this second coil and the described inner peripheral end thereof of described voice coil loudspeaker voice coil that formed comprises cooperation stage portion joined together by described stiffener.
4. voice coil loudspeaker voice coil as claimed in claim 3, is characterized in that:
Described second coil reduces more than 1 circle by the coiling of the inner peripheral end thereof by the flat hollow coil identical with described first coil turn and is formed, and the inner peripheral end thereof of the second coil has the internal diameter size larger than the internal diameter size of the inner peripheral end thereof of described first coil.
5. voice coil loudspeaker voice coil as claimed in claim 3, is characterized in that:
Described stiffener peripheral end described in it comprises the described cooperation stage portion coordinating stage portion to coordinate with the described inner peripheral end thereof of described voice coil loudspeaker voice coil.
6. voice coil loudspeaker voice coil as claimed in claim 1 or 2, is characterized in that:
Described stiffener is formed by resin or nonmagnetic metal.
7. voice coil loudspeaker voice coil as claimed in claim 1 or 2, is characterized in that:
Described first coil and described second coil are formed as comprising the run-track shaped of one group of line part and one group of arc sections or comprise the rectangular-shaped of two groups of line parts, and the described peripheral end of described stiffener comprises the one group of line part at least coordinated with this group of line part of this first coil and this second coil.
8. a dynamic speaker, comprising:
Voice coil loudspeaker voice coil as described in as described in any one of claim 1 ~ 7;
The speaker diaphragm linked with this voice coil loudspeaker voice coil;
There is the magnetic circuit of the magnetic gap of the linearity for configuring this voice coil loudspeaker voice coil;
The framework linked with this magnetic circuit; With
Peripheral end is fixed on the edge of the peripheral end this framework supporting this speaker diaphragm,
Described dynamic speaker uses to have the axial flat coil of the volume vertical relative to the direction of vibration of speaker diaphragm and the short elongated shape dynamic speaker in minor axis direction ratio major diameter direction.
9. dynamic speaker as claimed in claim 8, is characterized in that:
Also comprise inner peripheral portion and described voice coil loudspeaker voice coil links, peripheral part links with described framework or described magnetic circuit damper.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910226364.0A CN102082986B (en) | 2009-11-26 | 2009-11-26 | Voice coil and electrodynamic speaker using same |
| JP2010001399A JP5311061B2 (en) | 2009-11-26 | 2010-01-06 | Voice coil and electrodynamic speaker using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910226364.0A CN102082986B (en) | 2009-11-26 | 2009-11-26 | Voice coil and electrodynamic speaker using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102082986A CN102082986A (en) | 2011-06-01 |
| CN102082986B true CN102082986B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910226364.0A Expired - Fee Related CN102082986B (en) | 2009-11-26 | 2009-11-26 | Voice coil and electrodynamic speaker using same |
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| Country | Link |
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| JP (1) | JP5311061B2 (en) |
| CN (1) | CN102082986B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104811871A (en) * | 2015-04-27 | 2015-07-29 | 协康利电机(深圳)有限公司 | Voice coil and wiring method of voice coil |
| US11789489B2 (en) | 2017-12-07 | 2023-10-17 | Sony Corporation | Vibration system, speaker apparatus and video displaying apparatus |
| KR102061173B1 (en) * | 2018-08-07 | 2020-02-11 | 임성진 | Flat type and rectangle slim speaker having slim magnetic circuit core |
| CN111200778B (en) * | 2018-11-20 | 2021-08-31 | 乔旸电子股份有限公司 | Thin type loudspeaker with voice coil having wave-bouncing function |
| CN112040378B (en) * | 2020-09-02 | 2021-08-31 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker, voice coil manufacturing method and coil winding device |
| CN112040379B (en) * | 2020-09-02 | 2021-10-29 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker, voice coil manufacturing method and coil heating device |
| CN112040377B (en) * | 2020-09-02 | 2021-08-31 | 瑞声新能源发展(常州)有限公司科教城分公司 | Loudspeaker, voice coil manufacturing method and coil winding device |
| CN115278482A (en) * | 2021-04-29 | 2022-11-01 | 高创(苏州)电子有限公司 | Voice coil and loudspeaker |
| WO2024168641A1 (en) * | 2023-02-16 | 2024-08-22 | 瑞声光电科技(常州)有限公司 | Loudspeaker unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007129665A (en) * | 2005-11-07 | 2007-05-24 | Sony Corp | Speaker apparatus |
| CN101472211A (en) * | 2007-11-02 | 2009-07-01 | 安桥株式会社 | Voice coil assembly, loudspeaker using the same, and method for producing the same |
| CN201336724Y (en) * | 2008-12-19 | 2009-10-28 | 尼开电机(上海)有限公司 | Spiral type chip loudspeaker coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4899718U (en) * | 1972-02-25 | 1973-11-24 | ||
| WO2010097930A1 (en) * | 2009-02-26 | 2010-09-02 | パイオニア株式会社 | Voice coil for speaker device, and speaker device |
-
2009
- 2009-11-26 CN CN200910226364.0A patent/CN102082986B/en not_active Expired - Fee Related
-
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- 2010-01-06 JP JP2010001399A patent/JP5311061B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007129665A (en) * | 2005-11-07 | 2007-05-24 | Sony Corp | Speaker apparatus |
| CN101472211A (en) * | 2007-11-02 | 2009-07-01 | 安桥株式会社 | Voice coil assembly, loudspeaker using the same, and method for producing the same |
| CN201336724Y (en) * | 2008-12-19 | 2009-10-28 | 尼开电机(上海)有限公司 | Spiral type chip loudspeaker coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5311061B2 (en) | 2013-10-09 |
| JP2011114857A (en) | 2011-06-09 |
| CN102082986A (en) | 2011-06-01 |
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