CN103167388A - Loudspeaker device - Google Patents
Loudspeaker device Download PDFInfo
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- CN103167388A CN103167388A CN2012105551938A CN201210555193A CN103167388A CN 103167388 A CN103167388 A CN 103167388A CN 2012105551938 A CN2012105551938 A CN 2012105551938A CN 201210555193 A CN201210555193 A CN 201210555193A CN 103167388 A CN103167388 A CN 103167388A
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- magnetic circuit
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- speaker unit
- playback side
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Abstract
The invention provides a loudspeaker device, wherein, even if the dimension in a sound reproduction direction is reduced, sound pressure can also be controlled in a wide frequency band area, and clear bass and clear alt can be reproduced, thereby providing excellent sound reproducibility with high sound quality and low cost. In the loudspeaker device, magnetic circuit part is maintained at an external side of a playback side of a frame by the frame, a vibration transfer component is maintained at an internal side of the frame in a moving manner along a sound reproduction direction by the frame. The frame is an integration forming component comprising a concave part, a convex part and a concave space, wherein the concave is used for accepting the magnetic circuit part, the convex part extends to a playback side at the two sides of the concave part, and the concave space is formed in the convex part and recesses to the playback side from the sound reproduction side of the magnetic circuit.
Description
Technical field
The present invention relates to speaker unit.
Background technology
All the time, people use and are arranged on stereo set to be used for the speaker unit with outer cover (enclosure) of sounding.Such speaker unit has the loudspeaker unit of dynamic type, and by the vibration oscillating plate of this loudspeaker unit sounding.
But, in recent years, constantly miniaturization of stereo set and slimming, section is difficult to find the space of the outer cover that large volume is installed within it.Therefore, someone has proposed not need to install the miniature loudspeaker device (for example, referring to patent documentation 1) as the outer cover of separate part.
Fig. 6 is the profile of structure that the speaker unit of prior art is shown.
In figure, the framework of 811 expression speaker units, this framework is one-body molded for to be round flat shape by resin forming, and this framework comprises: the magnetic circuit support portion 817 of the magnetic circuit section of support speaker device; Be used as the side wall portion 812 of the outer circle wall of speaker unit; And with the front end of described magnetic circuit support portion 817 and the front board 816 that combines in interior week of side wall portion 812.
Then, the york piece 834 of ware type shape is installed in 817 inside in described magnetic circuit support portion, holds magnet 841 and dull and stereotyped 842 in the recess of this york piece 834.In addition, the place ahead (top in figure) of 817 arranges oscillating plate 846 in described magnetic circuit support portion.Further, at the back of this oscillating plate 846 fixed coil 843, this coil 843 is arranged in the magnetic gap that forms between the periphery of this flat board 842 and york piece 834.
In addition, in the set of the rear end of described side wall portion 812, periphery as the seal cover 833 of circular slab parts is arranged.By set, described seal cover 833 is arranged, the back of framework 811 is closed, and forms rear space 821 between seal cover 833 and magnetic circuit support portion 817 and front board 816.
And, form a plurality of communicating passage 815 that the rear with oscillating plate 846 is communicated with rear space 821 in described front board 816.In addition, have as the circular slab parts and periphery that be formed with the cover 826 of a plurality of not shown air vent holes in the front end set of described side wall portion 812.By set, described cover 826 is arranged, the front of framework 811 is closed and can prevents that foreign matter from entering.
Thus, framework 811 and seal cover 833 play the effect of outer cover (or housing), therefore can obtain good tonequality.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2003-348679 communique
But in the speaker unit of described prior art, because 817 rear forms rear space 821 holding magnet 841 etc. in the magnetic circuit support portion, so the size of the fore-and-aft direction of framework 811 becomes large.
In recent years, constantly miniaturization such as the stereo set of radiovisor etc. and slimming, particularly, in the stereo set of the slim TV receiving system that uses liquid crystal display, plasma scope etc. etc., section is difficult to find the space that the speaker unit with large-scale framework 811 is installed within it.
But for the thin and small-sized stereo set of slim TV receiving system etc. is installed, if the size of the fore-and-aft direction of framework 811 is shortened with miniaturization, the volume of rear space 821 diminishes, and tonequality descends.
In addition, owing to having front board 816 between the rear of oscillating plate 846 and rear space 821, therefore, even form a plurality of communicating passage 815, can not avoid tonequality to descend.And, because seal cover 833 and framework 811 are independent parts, therefore be difficult to reduce the manufacturing cost of speaker unit.
Summary of the invention
The technical problem to be solved in the present invention
The object of the invention is to solve the problem that exists in the speaker unit of described prior art, and such speaker unit is provided: in this speaker unit, framework keeps the framework of magnetic circuit section not only as outer cover but also be used as in its outside; And in this speaker unit, inboard in framework forms recess, this recess is one recessed facing to anti-playback side from the playback side of magnetic circuit section, even the size reduction of playback direction thus, also can control acoustic pressure in the broadband region, and can reproduce the bass of clear (crisp) and limpid alt, audio reproduction is good, tonequality is high, and cost is low.
The technological means that the present invention adopts
to achieve these goals, the invention provides a kind of speaker unit, have: oscillating plate, make the driver element of this vibration plate vibrates, and the framework that is used as the outer cover of the anti-playback side that covers described oscillating plate, described oscillating plate and framework see to have the narrow and elongated flat shape of width from the playback side, described driver element has magnetic circuit section, section cooperates and vibrative driver part with this magnetic circuit, and the vibration transfer member that the vibration of this driver part is sent to described oscillating plate, described magnetic circuit section is being maintained at the outside of the anti-playback side of described framework by described framework, described vibration transfer member by described framework can be maintained at along the mode that the playback direction moves the inboard of described framework, and this framework is for having recess, the integrally formed parts in protuberance and recessed space, its center dant holds described magnetic circuit section, protuberance is side-prominent in the two anti-playbacks of side direction of this recess, and recessed space is formed in this protuberance, and recessed towards anti-playback side from the surface of magnetic circuit section in the playback side.
In other speaker unit of the present invention, further, the face on the anti-playback side of the face on the anti-playback side of described protuberance and described magnetic circuit section flushes basically.
In another other speaker unit of the present invention, further, the perforate that is communicated with the outside is contained at least one the recessed space in the female space.
In other speaker unit more of the present invention, further, described perforate is opened on the face on the anti-playback side of described protuberance.
In other speaker unit more of the present invention, further, described perforate is by being communicated with recessed space along the groove that extends with the direction of playback direction quadrature.
Useful technique effect
Speaker unit according to the present invention has framework, and this framework not only can be used as outer cover but also can be used as in its outside and keeps the framework of magnetic circuit section.Framework has and is formed on its inboard recess, and this recess is one recessed facing to anti-playback side from the playback side of magnetic circuit section.Thus, even the size reduction of playback direction still can be controlled acoustic pressure, and can reproduce bass and limpid alt clearly in the broadband region, audio reproduction is good, and tonequality is improved, and has reduced simultaneously cost.
Description of drawings
Fig. 1 is the stereogram of the speaker unit in the present invention's the 1st embodiment, and (a) figure wherein is the view of seeing from the playback side, and (b) figure is the view of seeing from anti-playback side.
Fig. 2 is two views of the speaker unit in the present invention's the 1st embodiment, and (a) figure wherein is plan view, and (b) figure is the cutaway view along the A-A arrow in (a) figure.
Fig. 3 is the exploded perspective view of the speaker unit from the present invention's the 1st embodiment that the playback side is seen.
Fig. 4 is the exploded perspective view of the speaker unit from the present invention's the 1st embodiment that anti-playback side is seen.
Fig. 5 is three views of the speaker unit in the present invention's the 2nd embodiment, and (a) figure wherein is plan view, and (b) figure is end view, and (c) figure is the cutaway view along the B-B arrow in (a) figure.
Fig. 6 is the cutaway view of structure that the speaker unit of prior art is shown.
Description of reference numerals
10 speaker units
11 housings
12 side plates
13 rear boards
15,815 communicating passage
15a tonequality adjustment hole
16 front boards
The 16a oscillating plate holds peristome
The 16b circumference
17 magnetic circuit support convex
The 17a magnetic circuit supports protruding sidepiece
18 magnetic circuit fixed parts
18a magnetic circuit fixed part holds recess
21,821 rear space
21a is recessed into the space
34 magnetic circuits hold recess
35 end plate sections
The 35a installation portion
35b is board fixedly
The 35c mounting opening
36 coils pass through peristome
37 partition board portion
37a muffler connecting portion
40 magnetic circuit sections
41,841 magnets
41a, 42a centre bore
42,842 flat boards
43 voice coil loudspeaker voice coils
44 bobbins
45 dust caps
46,846 oscillating plates
46a central opening section
46b oscillating plate edge part
The 46c cushion part
48,834 york pieces
The 48a central post portion
50 mufflers
51 bobbin connecting portions
52 electric wires
53 terminals
54 guide plates
The 54a stator
55 arm portions
56 housing connecting portions
The 56a short leg
The 56b long leg
811 frameworks
812 side wall portions
816 front boards
817 magnetic circuit support portions
826 covers
833 seal covers
843 coils
Embodiment
With reference to the accompanying drawings embodiment of the present invention are elaborated.
Fig. 1 is the stereogram of the speaker unit in the present invention's the 1st embodiment.Need to prove, in figure, (a) figure is the view of seeing from the playback side, and (b) figure is the view of seeing from anti-playback side.
In figure, the speaker unit in 10 expression the present embodiment, it uses for being arranged in the various stereo sets such as radiovisor, broadcast receiver receiving system, PC, CD player, DVD player, game machine.Thereby speaker unit is to drive the sound-producing device of reproducing audio signal by the signal of telecommunication.Speaker unit 10 in the present embodiment can miniaturization, therefore, in general, can be arranged on slim TV receiving system, pocket pc, the PDA(Personal Digital Assistant that has used liquid crystal display, plasma scope etc.), portable game machine etc. is slim or compact electric apparatus, electronic equipment etc. in and use.This speaker unit can be arranged in any position of electrical equipment any kind, arbitrary size, electronic equipment etc. and use.
Need to prove, in the present embodiment, the term of the directions such as expression up, down, left, right, before and after of using with action for the formation of various piece that speaker unit 10 is described is not absolute but relative, suitable at speaker unit 10 or its parts when being posture shown in figure, but, when the posture of speaker unit 10 or its parts changes, should change according to the variation of posture to make an explanation.
Described speaker unit 10 has: magnetic circuit section 40, and it has the driver element for reproducing audio signal and sounding; Thereby the oscillating plate 46 by this magnetic circuit section 40 vibration sounding; And as the housing 11 of framework, described framework is not only as the framework of each parts that keep all sections 40 of magnetic circuit as described and oscillating plate 46 etc., but also as surround the outer cover of oscillating plate 46 in anti-playback side (side opposite with a side of sounding).Need to prove, described driver element also has the parts such as voice coil loudspeaker voice coil 43 and bobbin 44 etc. described later.
In addition, when plane projection face was seen, described speaker unit 10 was elongated microscler, perhaps can be the ellipse with major axis and minor axis from playback side (side of sounding).In other words, speaker unit 10 on the whole, it is for the size of vertically (long axis direction), the size of Width (short-axis direction) is short.
Described housing 11 is generally the integrally formed parts that are made of resins such as synthetic resin, but housing 11 also can be made of metals such as aluminium, steel, copper, or can be made of the composite material that resin, carbon, metal etc. are composited.In addition, described housing 11 has front board 16, side plate 12, rear board 13 and end plate section 35.Rear board 13 on anti-playback side forms the bottom, and the major part of front board 16 is in the upper shed of playback side.In other words, housing 11 is the shape of container with bottom, and for for the size of vertically (long axis direction), and the size of Width (short-axis direction) is short the container-like parts in the end.Need to prove, be formed with as the magnetic circuit towards the recessed recess of playback side at the middle body of the long axis direction of the anti-playback side of described housing 11 and hold recess 34, the both sides that this magnetic circuit holds the long axis direction of recess 34 relatively become as the magnetic circuit support convex 17 towards the side-prominent protuberance of anti-playback.Described magnetic circuit section 40 is accommodated in described magnetic circuit in the outside of housing 11 and holds in recess 34.
Like this, magnetic circuit section 40 exposes in the outside of housing 11, and the heat that therefore can be effectively magnetic circuit section 40 be produced is discharged in extraneous air, and particularly magnetic circuit section 40 is overheated thereby can prevent speaker unit 10.
In addition, form rear space 21 described later in the inside of described magnetic circuit support convex 17, and, form the tonequality adjustment hole 15a as perforate in being arranged on described magnetic circuit and holding at least one of rear board 13 of recess 34 both sides, wherein said perforate is positioned at the outboard end of the communicating passage 15 that described rear space 21 is communicated with the outside of housing 11.
Further, the terminal 53 that conducts with voice coil loudspeaker voice coil 43 described later is set around the tonequality adjustment hole 15a of described rear board 13.This terminal 53 is inserted into counterpart terminal, be used for being sent to from the electric audio signal of audible signal generating device voice coil loudspeaker voice coil 43, the audible signal generating device of the amplifier that wherein said counterpart terminal and the electrical equipment that speaker unit 10 is installed, electronic equipment etc. have etc. is connected.Need to prove, the position of described terminal 53 not necessarily must around the tonequality adjustment hole 15a of rear board 13, also can arrange arbitrarily.
In addition, described magnetic circuit section 40 has: the magnet 41 of rectangular tabular or highly low cube-shaped profile; And be arranged on york piece 48 on the face of anti-playback side of this magnet 41.The permanet magnet of described magnet 41 for being made of the high material of coercive force, described york piece 48 is for forming the parts of magnetic circuit, such as being made of the high material of the magnetic susceptibilities such as soft iron.Need to prove, the part of exposing in anti-playback side of the magnet 41 in described york piece 48 has the shape of rectangular flat shape.In this part, make the size of its long axis direction slightly shorter than the size of the long axis direction of magnet 41 like this, and the short-axis direction of the size of its short-axis direction and magnet 41 measure-alike or slightly shorter than the size of the short-axis direction of magnet 41.In addition, described magnetic circuit section 40 has rectangular flat shape or highly low cube-shaped profile on the whole, and is received and is arranged on the described magnetic circuit with about rectangular flat shape or highly low cube-shaped profile and hold in recess 34.
Be received and be arranged on magnetic circuit in described magnetic circuit section 40 and hold under state in recess 34, the face of its anti-playback side (that is, the face of the anti-playback side of york piece 48) flushes basically with the face of the anti-playback side of rear board 13.In addition, for described magnetic circuit section 40, the size of its long axis direction is held the size of long axis direction of recess 34 than magnetic circuit slightly short, and the short-axis direction of the size of its short-axis direction and housing 11 measure-alike or slightly shorter than the size of the short-axis direction of housing 11, therefore can positively be contained in magnetic circuit and be held in recess 34, and can be projected into the outside from side plate 12.
Thus, even in the situation that the inside of electrical equipment, electronic equipment etc. is installed the narrow space of speaker unit 10 and do not exceed the size of fore-and-aft direction (playback direction) of housing 11 more than needed, also can install and use speaker unit 10.
Need to prove, described housing 11 has towards the side-prominent cantilever-shaped magnetic circuit fixed part 18 of anti-playback.The free end of this magnetic circuit fixed part 18 forms uncinus, and is separately positioned on the two ends that magnetic circuit holds the long axis direction of recess 34.Then, the forming the magnetic circuit fixed part corresponding to the position of magnetic circuit fixed part 18 and hold recess 18a of magnetic circuit support convex 17, thereby absorb magnetic circuit fixed part 18 hold the displacement in the long axis direction outside of recess 34 towards magnetic circuit.Be contained in magnetic circuit and hold on the face of anti-playback side that magnetic circuit section 40 uncinuses by magnetic circuit fixed part 18 in recess 34 hang over magnet 41 and be lockable, do not break away from thereby magnet 41 can not hold recess 34 from magnetic circuit.Therefore, need not use the installations such as screw, joint just can be easily with parts and positively magnetic circuit section 40 is arranged on housing 11.
Form oscillating plate described later and hold peristome 16a in described front board 16, and oscillating plate 46 is accommodated in this oscillating plate and holds in peristome 16a.When seeing from plane projection face, this oscillating plate 46 be shaped as elongated rectangle, perhaps for having the ellipse of major axis and minor axis, and the short-axis direction of the size of its short-axis direction and housing 11 measure-alike or slightly shorter than the size of the short-axis direction of housing 11.Therefore, from the playback side of speaker unit 10, front board 16 is positioned at the outside of the long axis direction of oscillating plate 46, board 16 before existing hardly outside the short-axis direction of oscillating plate 46.Need to prove, the effect of the part performance dividing plate outside the long axis direction that is positioned at oscillating plate 46 of front board 16 is used for preventing from turning back to the playback side from anti-playback side sound out.
Described oscillating plate 46 has: the central opening 46a of section, the oscillating plate edge part 46b that is connected with the peripheral part one that forms in the central and the cushion part 46c that is connected with the periphery one of this oscillating plate edge part 46b.In the described central opening 46a of section, accommodate the dust cap 45 of the leading section that is arranged on aftermentioned bobbin 44.In addition, described oscillating plate edge part 46 has the section configuration for the bending that improves flexibility.Need to prove, the flat shape of described oscillating plate edge part 46b is the shapes such as ellipse with major axis and minor axis.Further, described cushion part 46c is flat-shaped part, and its outer peripheral edges are shaped as elongated rectangular four jiaos of shapes of cutting sth. askew and forming.
In addition, described end plate section 35 has installation portion 35a.This installation portion 35a is parallel with described front board 16, and has the fixedly board 35b that longitudinally extends outward from described end plate section 35, and mounting opening 35c.The part that the not shown loud speaker component for fixing that described fixedly board 35b is with the electrical equipment that speaker unit 10 is installed, electronic equipment etc. have is connected.Further, the part of described mounting opening 35c for inserting for set parts such as bolt, screws.Need to prove, the shape of described installation portion 35a and size can suitably change according to shape and the size at the position that speaker unit 10 is installed in the framework of electrical equipment, electronic equipment etc.For example, the diameter of described mounting opening 35c can change according to the external diameter of the set parts such as bolt, screw.In addition, shape and the size of the shape of described fixedly board 35b and the size loud speaker component for fixing that can have according to described electrical equipment, electronic equipment etc. change.
The below describes the internal structure of above-mentioned speaker unit 10.
Fig. 2 is two plan views of the speaker unit in the present invention's the 1st embodiment, Fig. 3 is the exploded perspective view of the speaker unit from the present invention's the 1st embodiment that the playback side is seen, Fig. 4 is the exploded perspective view of the speaker unit from the present invention's the 1st embodiment that anti-playback side is seen.In addition, in Fig. 2, (a) figure is plan view, and (b) figure is the cutaway view along the A-A arrow in (a) figure.
As shown in the figure, magnetic circuit section 40 also has the flat board 42 as top board on the face of the playback side that is arranged on magnet 41.The rectangular tabular shape of this flat board 42, the same with york piece 48, be also the parts that form magnetic circuit, and should flat board 42 such as being consisted of by the high material of the magnetic susceptibilities such as soft iron.In addition, described magnet 41 has the centre bore 41a that through-thickness (vertical direction in (b) figure of Fig. 2) runs through its center, and described dull and stereotyped 42 also have the centre bore 42a that through-thickness (vertical direction in (b) figure of Fig. 2) runs through its center.Under dull and stereotyped 42 states that are arranged on magnet 41, the centre bore 41a of magnet 41 is concentric with dull and stereotyped 42 centre bore 42a.Need to prove, preferably, the diameter of dull and stereotyped 42 centre bore 42a is less than the diameter of the centre bore 41a of magnet 41.
In addition, york piece 48 has from its center vertically along the extended columned central post portion 48a of playback side direction.Under york piece 48 was arranged on state on magnet 41, described central post portion 48a was inserted in the centre bore 41a of magnet 41 and in dull and stereotyped 42 centre bore 42a.Between the outer peripheral face of the inner peripheral surface of the centre bore 42a of this flat board 42 and the central post portion 48a of york piece 48, formed space becomes magnetic gap, is provided as the voice coil loudspeaker voice coil 43 of coil in this magnetic gap.
The parts of this voice coil loudspeaker voice coil 43 for forming like this: the wire that will be made of the high material of conductivity such as copper etc. is wrapped in through-thickness (fore-and-aft direction) (namely, the outer peripheral face of the rearward end of the cylindric bobbin 44 that playback direction (vertical direction in (b) figure of Fig. 2)) extends, this voice coil loudspeaker voice coil plays the effect of driver part.And described voice coil loudspeaker voice coil 43 has the cylindrical shape of thin thickness on the whole, and with through-thickness (that is, playback direction) movably mode be arranged in described magnetic gap.
In addition, described bobbin 44 is as the vibration transfer members, forwards extends from the front end of described voice coil loudspeaker voice coil 43, and connects at its leading section and be the roughly dust cap 45 of disk-like member.And, be connected with the bobbin connecting portion 51 of muffler 50 at the lateral surface of described bobbin 44.Need to prove, the housing connecting portion 56 of described muffler 50 is connected with housing 11.Thus, described voice coil loudspeaker voice coil 43 is retained as not with the two sides of above-mentioned magnetic gap (that is, playing the outer peripheral face of the central post portion 48a of the inner peripheral surface of centre bore 42a of flat board 42 of magnetic pole effect and york piece 48) and moves along the playback direction contiguously.
Need to prove, electric wire 52 is installed on bobbin 44.This electric wire 52 is used for electric audio signal is sent to voice coil loudspeaker voice coil 43, and a not shown end is connected with voice coil loudspeaker voice coil 43, and the other end is connected with terminal 53.Described electric wire 52 total lengths are longer, in Fig. 3 and Fig. 4 because illustrated relation only shows a part.
Further, the lateral surface of described bobbin 44 is connected to the inner peripheral of the central opening 46a of section of oscillating plate 46.Need to prove, described oscillating plate 46 is arranged on more the place ahead (that is, being arranged on the playback side) of described muffler 50.The cushion part 46c of described oscillating plate 46 is such as by EVA(ethylene-vinyl acetate copolymer resins) etc. have a flexibility material consist of, the set and be arranged on the circumference 16b that oscillating plate on the front board 16 that is formed at housing 11 holds peristome 16a by sticker etc. of its back.Thus, oscillating plate 46 is kept can not hindering vibration simultaneously by front board 16.
As shown in Figure 4, magnetic circuit holds recess 34 and is such recess: this recess is by with front board 16 partition board portion 37 parallel with rear board 13 and with these partition board portion 37 quadratures and support protruding sidepiece 17a along the pair of magnetic circuits that the playback direction is extended and be divided into three parts.Need to prove, be provided with along magnetic circuit near the central authorities of the protruding sidepiece 17a of each magnetic circuit support and support the magnetic circuit fixed part 18 that protruding sidepiece 17a extends.
Described partition board portion 37 is the inside and outside rectangular flat shape part that separates with housing 11, with respect to the playback direction, partition board portion 37 between front board 16 and rear board 13, and with the face of dull and stereotyped 42 playback side (it is to be contained in the face that magnetic circuit holds the playback side of the magnetic circuit section 40 in recess 34) adjacency.As mentioned above, hold and be arranged on magnetic circuit in magnetic circuit section 40 and hold under state in recess 34, face on the anti-playback side of magnetic circuit section 40 is basically to flush with face on the anti-playback side of rear board 13, therefore with respect to the playback direction, the distance between partition board portion 37 and rear board 13 equates substantially with the size of the thickness direction of magnetic circuit section 40.
In described partition board portion 37, form through-thickness and run through its central coil by peristome 36.As shown in (b) figure of Fig. 2, the almost whole inside that all is positioned at housing 11 of bobbin 44, namely, be positioned at the playback side with respect to partition board portion 37, but, at least the rear end part of voice coil loudspeaker voice coil 43 passes coil and extends towards the playback side with respect to partition board portion 37 by peristome 36, and thus, this part arrives by peristome 36 magnetic gap that is positioned at the playback side with respect to coil.
In addition, as shown in Figure 3, form at the periphery of the playback side of partition board portion 37 the muffler connecting portion 37a that extends towards the playback side with respect to partition board portion 37.In the one side of the playback side of this muffler connecting portion 37a, set has the housing connecting portion 56 of muffler 50 by sticker.
In the present embodiment, the integrally formed flat part of described muffler 50 for being consisted of by resins such as nylon, described muffler 50 has: the bobbin connecting portion 51 of circular (that is, flange shape); Housing connecting portion 56 around this bobbin connecting portion 51 rectangular ring on every side; And a pair of arm portions 55 of the slightly S-shaped shape that described bobbin connecting portion 51 and housing connecting portion 56 are coupled together.Need to prove, described housing connecting portion 56 comprises the pair of short edges 56a of section that extends along the short-axis direction of housing 11 and a pair of long leg 56b that extends along the long axis direction of housing 11, and arm portions 55 is connected with each short leg 56a.
Described arm portions 55 is smooth strip-shaped members, but, can bring into play flexibility by making flat shape bend to slightly S-shaped shape, thereby be connected in the end on bobbin connecting portion 51 and be connected between end on the short leg 56a of housing connecting portion 56 and can stretch.Therefore, the bobbin 44 that is connected in bobbin connecting portion 51 can move along the playback direction together with voice coil loudspeaker voice coil 43 and oscillating plate 46.Thus, oscillating plate 46 can vibrate unfetteredly.
Need to prove, form the guide plate 54 of guiding electric wire 52 and the stator 54a of securing electric lines 52 on the face of the playback side of described muffler 50.Thus, electric wire 52 is maintained on the face of playback side of muffler 50.Need to prove, described guide plate 54 and stator 54a can suitably omit.
On the playback side with respect to oscillating plate 46, rear space 21 is formed on the inside of housing 11, to be used as sound space.This rear space 21 is for supporting protruding sidepiece 17a, oscillating plate 46, bobbin 44 and magnetic circuit section 40 space around delimiting by side plate 12, rear board 13, end plate section 35, partition board portion 37, magnetic circuit.Therefore, housing 11 plays the effect of outer cover, and this can give full play to the performance of speaker unit 10.
In addition, the both sides of the long axis direction of the partition board portion 37 in described rear space 21 are formed with face with respect to dull and stereotyped 42 playback side (it is the face of the playback side of magnetic circuit section 40) towards the recessed recessed space 21a of playback side.Should recessed space 21a be the space corresponding with the inner space of magnetic circuit support convex 17.Need to prove, as previously mentioned, the face of the anti-playback side of magnetic circuit section 40 flushes basically with the face of the anti-playback side of rear board 13, so the degree of depth of the female space 21a, that is, the size of the playback direction of recessed space 21a equates substantially with the size of the thickness direction of magnetic circuit section 40.
Like this, by forming a pair of recessed space 21a, become large as the volume of the rear space 21 of the sound space of the anti-playback side of oscillating plate 46.Therefore, even the overall dimension of speaker unit 10 is little, also can make as the volume of the housing 11 of outer cover (namely, play the volume of the rear space 21 of sound space effect) become large, therefore can reproduce bass and limpid alt clearly, the audio reproduction change is good, and tonequality is improved.
In the present embodiment, the tonequality adjustment hole 15a of board 13 after being formed at is set at least one of a pair of recessed space 21a.
In having the speaker unit of outer cover, the volume V of outer cover (unit: rise) is represented by following formula (1):
V=(355 * a
4)/(α * f
2* m) ... formula (1)
Wherein, a is that (unit: cm), α is coefficient, and f is that (unit: Hz), m is the quality (unit: g) of vibration system to lowest resonance frequency for the equivalent redius of oscillating plate area.In addition, in the loud speaker with the tonequality adjustment hole that is formed on outer cover, the recommendation of factor alpha is more than 0.5.
In the trial target of the speaker unit 10 of the present embodiment that the inventor makes, V is 0.0223 liter, and a is 2.3cm, and f is 240Hz, and m is 1.8g.In these value substitution following formulas (1), factor alpha is 4.3.
Therefore, can find out, in the speaker unit 10 in the present embodiment, coefficient a can obtain good audio reproduction and tonequality in the recommendation scope.
Need to prove, in example shown in the figure, only in (b) figure of Fig. 2, the recessed space 21a on right side has tonequality adjustment hole (perforate) 15a, but, also only the recessed space 21a in the left side has tonequality adjustment hole 15a, perhaps can all have tonequality adjustment hole 15a at the recessed space 21a of the left and right sides.
Need to prove, in example shown in the figure, this tonequality adjustment hole 15a is shaped as roughly T font, and still, its shape is not limited to roughly T font, but can have any shape.In addition, the area of tonequality adjustment hole 15a also can suitably be set.
Thus, the rear space 21 that plays the outer cover effect is passed through tonequality adjustment hole 15a and is communicated with the outside.Therefore, the length by regulating tonequality adjustment hole 15a, cross sectional shape, cross-sectional sizes etc. can be controlled the acoustic pressure of various frequency bands.Particularly, can improve the tonequality of low frequency band.
like this, in the present embodiment, speaker unit 10 has oscillating plate 46, make the driver element of oscillating plate 46 vibrations, and the housing that plays the outer cover effect 11 that covers the anti-playback side of oscillating plate 46, oscillating plate 46 and housing 11 see to have the narrow and elongated flat shape of width from the playback side, driver element has magnetic circuit section 40, cooperate and vibrative voice coil loudspeaker voice coil 43 with magnetic circuit section 40, and the bobbin 44 that the vibration of voice coil loudspeaker voice coil 43 is sent to oscillating plate 46, magnetic circuit section 40 is maintained at the outside of housing 11 at anti-playback side place by housing 11, bobbin 44 by housing 11 with along the playback direction movably mode be maintained on housing 11, the parts that housing 11 is formed as one, and have the magnetic circuit that holds magnetic circuit section 40 and hold recess 34, hold the both sides of recess 34 at magnetic circuit towards the side-prominent magnetic circuit support convex 17 of anti-playback, and in the 17 interior formation of magnetic circuit support convex, from the playback side of magnetic circuit section 40 one facing to the recessed recessed space 21a of anti-playback side.
Like this, need not use the separate part such as framework etc., only just can keep driver element and oscillating plate 46 with integrally formed housing 11, thereby can reduce number of spare parts, make assembling easily, reduce the cost of speaker unit 10.In addition, cover the anti-playback side of oscillating plate 46 with integrally formed housing 11, therefore improved the function as outer cover, even adopt the narrow and elongated shape of width, the speaker unit 10 that also can obtain to have good audio reproduction, high tone quality.Further, because recessed space 21a is set to from the playback side one of magnetic circuit section 40 recessed facing to anti-playback side, even therefore with the size reduction of the playback direction of speaker unit 10 with miniaturization, also can make the volume as the housing 11 of outer cover become large, can reproduce bass and limpid alt clearly, the audio reproduction change is good, and tonequality is improved.
In addition, the face of the anti-playback side of magnetic circuit support convex 17 flushes basically with the face of the anti-playback side of magnetic circuit section 40.Therefore, though with the size reduction of the playback direction of speaker unit 10 with miniaturization, also can make the size of the playback direction of recessed space 21a become large.
Further, at least one the recessed space in recessed space 21a comprises the communicating passage 15 that is communicated with the outside.Thus, the acoustic pressure of various frequency bands can be controlled, particularly, the tonequality of low frequency band can be improved.
The below describes the present invention's the 2nd embodiment.Need to prove, about the structure identical with the 1st embodiment, be marked with identical Reference numeral and omit its description.In addition, about the action identical with described the 1st embodiment and identical effect, also omit its description.
Fig. 5 is three views of the speaker unit in the present invention's the 2nd embodiment.Need to prove, in Fig. 5, (a) figure is plan view, and (b) figure is end view, and (c) figure is the cutaway view along B-B arrow in (a) figure.
In the present embodiment, at least one the recessed space 21a in a pair of recessed space 21a has the communicating passage 15 as groove.The end of the anti-playback side of this communicating passage 15 in recessed space 21a is along extending with the direction of the playback direction quadrature long axis direction of housing 11 (specifically, for).Then, tonequality adjustment hole (perforate) 15a is formed on the side (being formed on specifically, the side of end plate section 35) of magnetic circuit support convex 17.In addition, tonequality adjustment hole 15a's is shaped as essentially rectangular.
About the formation of other side, for example, although the shape of the each several parts such as installation portion 35a or size are different with aforementioned the 1st embodiment, identical with the 1st embodiment in fact, therefore omit its description.
In the trial target of the speaker unit 10 of the present embodiment that the inventor makes, V is 0.0114 liter, and a is 1.93cm, and f is 210Hz, and m is 0.7g.In these value substitution following formulas (1), factor alpha is 14.0.
Therefore, can find out, in the speaker unit 10 in the present embodiment, factor alpha thereby can obtain good audio reproduction and tonequality also in the scope of recommendation.
Like this, in the present embodiment, the communicating passage 15 with groove function is along extending with the direction of playback direction quadrature, and the tonequality adjustment hole 15a of outboard end that is positioned at communicating passage 15 is at the lateral opening of magnetic circuit support convex 17.
Like this, the length by regulating communicating passage 15 and tonequality adjustment hole 15a, cross sectional shape, cross-sectional sizes etc. can be controlled the acoustic pressure of various frequency bands.
Need to prove, the present invention is not limited to above-mentioned embodiment, can carry out various distortion based on aim of the present invention, and these also are not precluded within outside the scope of the invention.
Industrial usability
The present invention is applicable to speaker unit.
Claims (5)
1. a speaker unit, is characterized in that,
(a) this speaker unit has: oscillating plate; Make the driver element of this vibration plate vibrates; And the framework that is used as the outer cover of the anti-playback side that covers described oscillating plate;
(b) described oscillating plate and framework see to have the narrow and elongated flat shape of width from the playback side;
(c) described driver element has: magnetic circuit section; Section cooperates and vibrative driver part with this magnetic circuit; And the vibration transfer member that the vibration of this driver part is sent to described oscillating plate, described magnetic circuit section is maintained at the outside of the anti-playback side of described framework by described framework, described vibration transfer member by described framework with along the playback direction movably mode be maintained at the inboard of described framework; And
(d) parts that are formed as one of this framework and having: the recess that holds described magnetic circuit section; The two side-prominent protuberances of the anti-playback of side direction at this recess; And form in this protuberance, from the playback side one of described magnetic circuit section facing to the recessed recessed space of anti-playback side.
2. speaker unit according to claim 1, wherein, the face of the anti-playback side of described protuberance flushes basically with the face of the anti-playback side of described magnetic circuit section.
3. speaker unit according to claim 1 and 2, wherein, at least one the recessed space in the female space comprises the perforate that is communicated with the outside.
4. speaker unit according to claim 3, wherein, described perforate is opened on the face of the anti-playback side of described protuberance.
5. speaker unit according to claim 3, wherein, described perforate is by being communicated with the female space along the groove that extends with the direction of playback direction quadrature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011276759A JP5714477B2 (en) | 2011-12-19 | 2011-12-19 | Speaker device |
| JP2011-276759 | 2011-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103167388A true CN103167388A (en) | 2013-06-19 |
| CN103167388B CN103167388B (en) | 2016-10-05 |
Family
ID=48590062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210555193.8A Expired - Fee Related CN103167388B (en) | 2011-12-19 | 2012-12-19 | Speaker unit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5714477B2 (en) |
| CN (1) | CN103167388B (en) |
| TW (1) | TWI549526B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106465018A (en) * | 2014-06-26 | 2017-02-22 | Toa株式会社 | Speaker unit and speaker comprising that speaker unit |
| CN109076278A (en) * | 2017-04-26 | 2018-12-21 | 华为技术有限公司 | A kind of horn assembly, electronic equipment and the method for installing horn assembly in the electronic device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6251881B2 (en) * | 2013-07-24 | 2017-12-27 | パナソニックＩｐマネジメント株式会社 | SPEAKER SYSTEM, ELECTRONIC DEVICE USING THE SAME, AND MOBILE DEVICE |
| TWI706677B (en) * | 2019-04-19 | 2020-10-01 | 友達光電股份有限公司 | Display device |
| CN118900390B (en) * | 2024-10-08 | 2025-02-11 | 瑞声光电科技(常州)有限公司 | Loudspeaker |
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| CN106465018B (en) * | 2014-06-26 | 2019-07-19 | Toa株式会社 | Loudspeaker unit and the loudspeaker for having the loudspeaker unit |
| CN109076278A (en) * | 2017-04-26 | 2018-12-21 | 华为技术有限公司 | A kind of horn assembly, electronic equipment and the method for installing horn assembly in the electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201334579A (en) | 2013-08-16 |
| TWI549526B (en) | 2016-09-11 |
| JP2013128199A (en) | 2013-06-27 |
| CN103167388B (en) | 2016-10-05 |
| JP5714477B2 (en) | 2015-05-07 |
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