CN1822714A - Electroacustic convertor - Google Patents
Electroacustic convertor Download PDFInfo
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- CN1822714A CN1822714A CN 200610003547 CN200610003547A CN1822714A CN 1822714 A CN1822714 A CN 1822714A CN 200610003547 CN200610003547 CN 200610003547 CN 200610003547 A CN200610003547 A CN 200610003547A CN 1822714 A CN1822714 A CN 1822714A
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Abstract
The invention provided a dynamic electroacoustic transducer almost with a rectangular outer shape, wherein the reproduction band is extended and the sound pressure is improved. An interval between a short side part 14B of a voice coil 14 with a nearly rectangular winding shape and an outer circumferential edge part 12a of a diaphragm 12 is set to be greater than an interval between a long side part 14A of the voice coil 14 and the outer circumferential part 12a. Thus, a coil terminal 14a of the voice coil 14 can easily be conductive and fixed to a terminal member at a position between its short side part 14A and the outer circumferential edge part 12a of the diaphragm 12. Through the configuration above, the rigidity around a region in the vicinity of a fixed part to the short side part 14B of the voice coil 14 in the diaphragm 12 is prone to decrease, but the rigidity is enhanced by forming three beads 12Ad for communicatively connecting an inner side space to an outer side space of the voice coil 14 to the fixed part so that a required vibration characteristic can be ensured to extend the reproduction band and sufficiently ensure the volume of a back pressure space.
Description
Technical field
The present invention relates to the electroacoustic transducing device of so-called power type.
Background technology
Usually, the electroacoustic transducing device of power types such as power type loud speaker is as described in for example " patent documentation 1 ", for having the structure with the lower part: vibrating membrane; Voice coil loudspeaker voice coil, it is fixed on the lower surface of this vibrating membrane; And framework, the outer peripheral edges portion of its fixed support vibrating membrane.
In " patent documentation 2 ", put down in writing a kind of small-sized electroacoustic transducing device, its be arranged in vibrating membrane than the part of fixing voice coil loudspeaker voice coil more by on the locational auxiliary circle top of outer circumferential side, form and extend to fixedly a plurality of strias of the part of voice coil loudspeaker voice coil.
[patent documentation 1] spy opens the 2002-152885 communique
[patent documentation 2] spy opens flat 8-140183 communique
Summary of the invention
Small-sized electroacoustic transducing device mostly is installed on the external equipments such as mobile phone, if its outer shape is set at roughly rectangle, then can improve the installation to external equipment.
Under the situation that adopts this structure,, then the outer shape of vibrating membrane and the winding form of voice coil loudspeaker voice coil also to be set at roughly rectangle if increase the size of vibrating membrane in order to improve acoustic characteristic.At this moment, electroacoustic transducing device is kept on the basis of elongated shape, preferably between the outer peripheral edges portion of the short side part of voice coil loudspeaker voice coil and vibrating membrane, the coil end conducting of voice coil loudspeaker voice coil is being fixed on the terminal component.
Yet, under these circumstances, the fixing near zone of the part of the short side part of voice coil loudspeaker voice coil in the vibrating membrane, compare with the near zone of the part of fixing its long leg branch, rigidity reduces significantly, so following problem is arranged, promptly be difficult to guarantee required vibration characteristics, reproduction band narrows down.
In addition, like this outer shape of vibrating membrane is being set under the roughly rectangular situation, because be difficult to guarantee fully the volume in back pressure space of interior all sides of voice coil loudspeaker voice coil, so also there is the problem that is difficult to improve fully sound press.In addition, general in the electroacoustic transducing device of power type, be provided for accommodating the magnetic loop unit with magnetic gap of voice coil loudspeaker voice coil bottom, but because consider from the aspect of magnetic efficiency, the gap of this magnetic loop unit and voice coil loudspeaker voice coil is set very narrowly, so air comes in the past in the inner space and the outer space of voice coil loudspeaker voice coil by this gap, produces big pressure, therefore produce the problem that back pressure uprises.
On the other hand, this the outer shape of vibrating membrane and the winding form of voice coil loudspeaker voice coil are set in the roughly rectangular electroacoustic transducing device, if as described in above-mentioned " patent documentation 2 ", be on the auxiliary circle top of vibrating membrane, to form to extend to the fixedly structure of a plurality of strias of the part of voice coil loudspeaker voice coil, then can improve in the vibrating membrane the fixedly rigidity of the near zone of the part of the short side part of voice coil loudspeaker voice coil.But under these circumstances, because the rigidity at auxiliary circle top itself also improves, so following problem occurs, promptly its vibration mark does not have surplus, worries can reduce acoustic characteristic on the contrary.
The present invention proposes just in view of the above problems, and its objective is provides a kind of roughly electroacoustic transducing device of the power type of rectangular outer shape that has, and it can realize the expansion of reproduction band and the raising of sound press.
The present invention realizes above-mentioned purpose by form fin (bead) on the regulation position of vibrating membrane.
That is to say that the electroacoustic transducing device that the present invention relates to has: vibrating membrane; Voice coil loudspeaker voice coil, it is fixed on the lower surface of this vibrating membrane; And framework, it is characterized in that from the outer peripheral edges portion of the above-mentioned vibrating membrane of below fixed support,
The outer shape of above-mentioned vibrating membrane is configured to roughly rectangle, simultaneously, the winding form of above-mentioned voice coil loudspeaker voice coil be configured to and the outer peripheral edges portion of above-mentioned vibrating membrane between across the roughly rectangle of predetermined distance,
Interval between the outer peripheral edges portion of the short side part of above-mentioned voice coil loudspeaker voice coil and above-mentioned vibrating membrane is set at than the big value in interval between the outer peripheral edges portion of the long leg branch of above-mentioned voice coil loudspeaker voice coil and above-mentioned vibrating membrane,
In above-mentioned vibrating membrane, fix on the part of short side part of above-mentioned voice coil loudspeaker voice coil, form the fin that at least one inner space that makes above-mentioned voice coil loudspeaker voice coil and outer space are connected.
Above-mentioned " at least one fin " needs only on the part of the short side part of fixing above-mentioned voice coil loudspeaker voice coil in vibrating membrane, so that the mode that the inner space of voice coil loudspeaker voice coil and outer space are connected forms, then concrete structure such as its section shape and formation number is not specially limited.
The effect of invention
Shown in above-mentioned structure, the electroacoustic transducing device that the present invention relates to constitutes the electroacoustic transducing device of power type, but because its vibrating membrane has roughly rectangular outer shape, so electroacoustic transducing device is slenderly formed, thus, can improve installation to external equipments such as mobile phones.
And, the electroacoustic transducing device that the present invention relates to, the winding form of its voice coil loudspeaker voice coil set for and the outer peripheral edges portion of vibrating membrane between across the roughly rectangle of predetermined distance, at this moment, interval between the outer peripheral edges portion of the short side part of voice coil loudspeaker voice coil and vibrating membrane, be set at than the long leg of voice coil loudspeaker voice coil divide and the outer peripheral edges portion of vibrating membrane between the big value in interval, so can be between the outer peripheral edges portion of the short side part of voice coil loudspeaker voice coil and vibrating membrane, the coil end conducting with voice coil loudspeaker voice coil easily is fixed on the terminal component, can make electroacoustic transducing device keep elongated shape thus.
On the other hand, under the situation that adopts this structure, be difficult to guarantee fully in the vibrating membrane the fixedly rigidity of the near zone of the part of the short side part of voice coil loudspeaker voice coil, but in the electroacoustic transducing device that the present invention relates to, in its vibrating membrane, fix on the part of short side part of above-mentioned voice coil loudspeaker voice coil, form the fin that at least one inner space that makes voice coil loudspeaker voice coil and outer space are connected, so can improve the rigidity of this fixed part near zone, can guarantee required vibration characteristics thus, realize the expansion of reproduction band.
In addition, because utilize these at least one fin, the inner space and the outer space of voice coil loudspeaker voice coil are connected, so even the volume in the back pressure space of interior all sides of voice coil loudspeaker voice coil is little, it is connected with the back pressure space of the outer circumferential side of voice coil loudspeaker voice coil, therefore the situation of the structure that is connected with inner space that only utilizes gap between voice coil loudspeaker voice coil and the magnetic loop unit to make voice coil loudspeaker voice coil and outer space is compared, and can reduce air and come in the past pressure between the inner space of voice coil loudspeaker voice coil and outer space.Thus, because can use inner space and outer space as a back pressure space,, can fully improve sound press thus so can guarantee the volume in back pressure space fully.
Like this, by the present invention, can realize the expansion of reproduction band of electroacoustic transducing device of power type and the raising of sound press.
If in said structure, make and be arranged in the part of vibrating membrane than the more inner all sides of part of fixing above-mentioned voice coil loudspeaker voice coil, for forming the structure of the top bulge that expands upward, more lean on the part than fixing above-mentioned voice coil loudspeaker voice coil in the vibrating membrane on the position of outer circumferential side simultaneously, form the wall portion that upwards erects, form each fin near the mode that extends to from the top bulge wall portion again, then can further improve in the vibrating membrane the fixedly rigidity of the near zone of the part of the short side part of voice coil loudspeaker voice coil.Perhaps, with from above the bulge mode that extends to wall portion form under the situation of each fin, also can further improve in the vibrating membrane the fixedly rigidity of the near zone of the part of the short side part of voice coil loudspeaker voice coil.
Under these circumstances, if make the structure that vibrating membrane is served as reasons central vibration section and the ring-type vibration section that engages with the outer peripheral edges portion of this central authorities vibration section is formed, become these central vibration sections and ring-type vibration section than above-mentioned wall portion structure more by engaging on the position of outer circumferential side, then because can constitute vibrating membrane by central vibration section and the ring-type vibration section that material and thickness differ from one another, have the fixedly rigidity of the central vibration section of the part of voice coil loudspeaker voice coil so can improve, can reduce the rigidity of ring-type vibration section on the other hand.Thus, because can make on the central vibration section and can not produce abnormal vibrations, and make the vibration mark of ring-type vibration section have surplus, guarantee the reproduction band of abundant width so can suppress the rising of lowest resonance frequency, can further improve the acoustic characteristic of electroacoustic transducing device thus.
Description of drawings
Fig. 1 is the plan view of representing under the configuration status up at electroacoustic transducing device that an embodiment of the invention relate to.
Fig. 2 is the II-II line profile of Fig. 1.
Fig. 3 is the III-III line profile of Fig. 1.
Fig. 4 is the IV portion details drawing of Fig. 3.
Fig. 5 is a plan view of representing the vibrating membrane of above-mentioned electroacoustic transducing device with single parts.
Fig. 6 is the sectional side view of manufacturing process of the above-mentioned electroacoustic transducing device of expression, is the figure to represent with the corresponding profile position of Fig. 2.
Fig. 7 is the sectional side view of manufacturing process of the above-mentioned electroacoustic transducing device of expression, is the figure to represent with the corresponding profile position of Fig. 3.
Fig. 8 is the figure the 1st variation, identical with Fig. 5 of the above-mentioned execution mode of expression.
Fig. 9 is the figure the 2nd variation, identical with Fig. 5 of the above-mentioned execution mode of expression.
Embodiment
Below use accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the plan view of representing under the configuration status up at electroacoustic transducing device 10 that an embodiment of the invention relate to.In addition, Fig. 2 is the II-II line profile of Fig. 1, and Fig. 3 is the III-III line profile of Fig. 1.
As shown in these figures, this electroacoustic transducing device 10 is small-sized power type loud speakers, is to use under the state that is equipped on the external equipments such as mobile phone.This electroacoustic transducing device 10 has from the plane sees roughly rectangular outer shape, and the width of its long side direction is set to the value about 20mm, and the width of short side direction is set to the value about 10mm.
This electroacoustic conversion 10 has: vibrating membrane 12; Voice coil loudspeaker voice coil 14, it is fixed on the lower surface of this vibrating membrane 12; Framework 16, it is from the 12a of outer peripheral edges portion of below fixed support vibrating membrane 12; The magnetic gap of the bottom of voice coil loudspeaker voice coil 14 is accommodated in magnetic loop unit 18, its formation; Outer cover 20, it covers vibrating membrane 12 from upper side; And 1 pair of terminal component 22, they are fixed on the framework 16.
Fig. 4 is the IV portion details drawing of Fig. 3, and Fig. 5 is a plan view of representing vibrating membrane 12 with single parts.
As shown in these figures, vibrating membrane 12 is made of central vibration section 12A and ring-type vibration section 12B, has the roughly rectangular outer shape slightly littler than the outer shape of electroacoustic transducing device 10.The vibration section 12A of central authorities has roughly rectangular outer shape long on the long side direction of electroacoustic transducing device 10.On the other hand, ring-type vibration section 12B has the roughly rectangular outer shape than the big circle of central vibration section 12A, forms the endless member that surrounds central vibration section 12A along whole periphery with roughly the same width.And this ring-type vibration section 12B circumference 12Ba within it upward engages with the 12Aa of outer peripheral edges portion of central vibration section 12A.
These central vibration section 12A and ring-type vibration section 12B constitute by the parts with light transmission, and ring-type vibration section 12B is by constituting than the low parts of central vibration section 12A rigidity.Specifically, central vibration section 12A is made of the hard resin parts such as Polyetherimide that for example have the thickness about 50 μ m, and ring-type vibration section 12B is made of the soft resin parts such as polyurethane that for example have the thickness about 100 μ m.
The joint of these central vibration section 12A and ring-type vibration section 12B is by having used the bonding of ray hardening type adhesive A to carry out.That is to say, this joint is by applied the ray hardening type adhesive A that is produced sclerosis by radiation of visible light on the upper surface of the 12Aa of outer peripheral edges portion of central vibration section 12A after, the 12Ba of inner peripheral portion of ring-type vibration section 12B is folded on the 12Aa of this outer peripheral edges portion from upper side, under this state from above (perhaps from the below) irradiation visible light carry out.
Voice coil loudspeaker voice coil 14 is fixing with respect to vibrating membrane 12, is on the position of all sides in deflection of junction surface between central vibration section 12A and the ring-type vibration section 12B from it, by bonding the carrying out of having used above-mentioned ray hardening type adhesive A.
Voice coil loudspeaker voice coil 14, its winding form is set to roughly rectangle.The long leg of voice coil loudspeaker voice coil 14 divides 14A, near interior all sides of the 12Aa of outer peripheral edges portion of central vibration section 12A, in the mode that parallels with the 12Aa of this outer peripheral edges portion, extends with linearity.On the other hand, the short side part 14B of voice coil loudspeaker voice coil 14, from the inside all lateral deviations of the 12Aa of outer peripheral edges portion of central vibration section 12A on position to a certain degree, in the mode that slowly swells to outer circumferential side, with circular-arc extension.And, a pair of coil end 14a of this voice coil loudspeaker voice coil 14, a pair of corner part from the both ends of a limit part 14A being arranged in this voice coil loudspeaker voice coil 14 begins, and extends out to the outer circumferential side of pair of short edges part 14B.
Be arranged in central vibration section 12A than the fixing part of the more inner all sides in position of voice coil loudspeaker voice coil 14, form the top bulge 12Ab that expands upward.This top bulge 12Ab has the section shape of linearity on the long side direction of electroacoustic transducing device 10, on the other hand, on its short side direction, have the circular-arc section shape that side upward slowly swells.And the outer peripheral edges portion of this top bulge 12Ab forms along the long leg of voice coil loudspeaker voice coil 14 and divides the pair of straight wire wall 12Ab1 of portion of 14A and along a pair of circular-arc wall 12Ab2 of portion of its short side part 14B.
Be arranged in the annulus of the outer circumferential side of the vibration section 12A of these central authorities top bulge 12Ab, form the planar portions 12Ac that the upper surface with voice coil loudspeaker voice coil 14 connects.Divide 12Ac1 with the adjacent long leg of the linearity wall 12Ab1 of portion of top bulge 12Ab among this planar portions 12Ac, form, on its Width central portion, carry out and being adhesively fixed of voice coil loudspeaker voice coil 14 with the width wideer slightly than the coiling thickness of voice coil loudspeaker voice coil 14.On the other hand, with the adjacent short side part 12Ac2 of the circular-arc wall 12Ab2 of portion of top bulge 12Ab,, within it on the circumference, carry out and being adhesively fixed of voice coil loudspeaker voice coil 14 among this planar portions 12Ac to form than the wide a lot of width of the coiling thickness of voice coil loudspeaker voice coil 14.
On each short side part 12Ac2 in the planar portions 12Ac of central vibration section 12A, form 3 fin 12Ad.These 3 fin 12Ad have trapezoidal section shape, on the short side direction of electroacoustic transducing device 10 across uniformly-spaced on its long side direction, extending.These fins 12b makes the inner space of voice coil loudspeaker voice coil 14 and outer space be connected at the upper side of this voice coil loudspeaker voice coil 14 near extending to the 12Aa of outer peripheral edges portion of central vibration section 12A from the circular-arc wall 12Ab2 of portion of top bulge 12Ab thus.
Outer circumferential side at the planar portions 12Ac of central vibration section 12A becomes the 12Ae of wall portion along whole peripheral shape, and the 12Aa of outer peripheral edges portion of central thus vibration section 12A exceeds one section than its planar portions 12Ac.Thus, the bonding station of central vibration section 12A and ring-type vibration section 12B, be set in than on the square on the upper side position, the fixed position of voice coil loudspeaker voice coil 14 and vibrating membrane 12.
Ring-type vibration section 12B, the part between its 12Ba of inner peripheral portion and its outer peripheral edges portion (being the 12a of outer peripheral edges portion of vibrating membrane 12) forms the top bulge 12Bb that extends with ring-type, and the section shape of this top bulge 12Bb is up circular-arc.
Pair of terminal parts 22 form with framework 16 by produced by insert molding.This pair of end subassembly 22, its part is formed on the welding disk that exposes on the upper surface of bottom wall portion, this bottom wall portion is positioned at the long side direction both sides of framework 16 16b of central opening portion, and in addition, other not shown parts form in the mode that exposes on the outer surface of framework 16.And, etc. by hot pressing from voice coil loudspeaker voice coil 14 extended each coil end 14a and fix with respect to the welding disk conducting of these terminal components 22.
The steel plate of counter disk constitutes outer cover 20 by forming roughly, has to see roughly rectangular outer shape from the plane.And this outer cover 20 by common bonding agent B, by the 20a of its outer peripheral edges portion, is adhesively fixed on from the below and is fixedly supported on the 12a of outer peripheral edges portion of the vibrating membrane 12 on the vibrating membrane support portion 16a of framework 16.As this common bonding agent B, can adopt cyanoacrylate the moment bonding agent, utilize airborne moisture to produce the bonding agent of sclerosis or make solvent gasification carrying out bonding bonding agent etc.In addition, on a plurality of positions of outer cover 20, form louver 20b.
Fig. 6 and Fig. 7 are the sectional side views of manufacturing process of expression electroacoustic transducing device 10, are the figure to represent with Fig. 2 and the corresponding profile position of Fig. 3.
As shown in these figures, vibrating membrane 12 its should the vibration section 12A of central authorities and ring-type vibration section 12B engage in advance and finish under the state of vibrating membrane 12, with respect to voice coil loudspeaker voice coil 14 and framework 16 and be fixed.
At this moment, voice coil loudspeaker voice coil 14 its each coil end 14a conductings in advance of maintenance are fixed on the state on each terminal component 22, and keep utilizing support fixture 100 to concern the state that is positioned and supports with respect to framework 16 with the position of regulation.Then, under this state, on the vibrating membrane support portion 16a of the upper surface of voice coil loudspeaker voice coil 14 and framework 16, apply respectively after the ray hardening type adhesive A, on the vibrating membrane support portion 16a of the upper surface of these voice coil loudspeaker voice coils 14 and framework 16, place vibrating membrane 12, make each ray hardening type adhesive A sclerosis from top irradiation visible light, thus, simultaneously vibrating membrane 12 is adhesively fixed on voice coil loudspeaker voice coil 14 and the framework 16.
As detailed above, the electroacoustic transducing device 10 that present embodiment relates to constitutes the power type loud speaker, but,, can improve installation thus to external equipments such as mobile phones so electroacoustic transducing device 10 is slenderly formed because its vibrating membrane 12 has roughly rectangular outer shape.
And, the electroacoustic transducing device 10 that the present invention relates to, the winding form of its voice coil loudspeaker voice coil 14 be set to and the 12a of outer peripheral edges portion of vibrating membrane 12 between across the roughly rectangle of predetermined distance, but at this moment, because the interval between the 12a of outer peripheral edges portion of the short side part 14B of voice coil loudspeaker voice coil 14 and vibrating membrane 12, be set to the value that long leg greater than voice coil loudspeaker voice coil 14 divides the interval between the 12a of outer peripheral edges portion of 14A and vibrating membrane 12, so can be between the 12a of outer peripheral edges portion of the short side part 14B of voice coil loudspeaker voice coil 14 and vibrating membrane 12, the coil end 14a conducting with voice coil loudspeaker voice coil 14 easily is fixed on the terminal component 22, can make electroacoustic transducing device 10 keep elongated shape thus.
On the other hand, under the situation that adopts such structure, be difficult to guarantee fully in the vibrating membrane 12 the fixedly rigidity of the near zone of the part of the short side part 14B of voice coil loudspeaker voice coil 14, but in the electroacoustic transducing device 10 that present embodiment relates to, because in its vibrating membrane 12 fixedly on the part of the short side part 14B of voice coil loudspeaker voice coil 14, formation makes the inner space of voice coil loudspeaker voice coil 14 and 3 fin 12Ad that outer space is connected, so can improve the rigidity of this fixed part near zone, can guarantee required vibration characteristics thus and enlarge reproduction band.
In addition, become the structure that the inner space that makes voice coil loudspeaker voice coil 14 and outer space are connected because utilizing these 3 fin 12Ad, so although the volume in the back pressure space of interior all sides of voice coil loudspeaker voice coil 14 is quite little, but because it is connected with the back pressure space of the outer circumferential side of voice coil loudspeaker voice coil 14, therefore with the gap that only utilizes voice coil loudspeaker voice coil 14 with magnetic loop unit 18 situation of the structure that inner space and outer space be communicated with is compared, can be reduced air and come in the past pressure in the inner space of voice coil loudspeaker voice coil 14 and outer space.Thus, because can use inner space and outer space as 1 back pressure space,, can improve sound press fully thus so can guarantee the volume in back pressure space fully.
Thus,, in the electroacoustic transducing device 10 of power type, can enlarge reproduction band, and improve sound press according to present embodiment.
And, the electroacoustic transducing device 10 that present embodiment relates to, because be positioned in its vibrating membrane 12 than the fixing part of the more inner all sides of part of voice coil loudspeaker voice coil 14, form the top bulge 12Ab that expands upward, simultaneously, in vibrating membrane 12 than the part of fixing voice coil loudspeaker voice coil 14 more by on the position of outer circumferential side, form the 12Ae of wall portion that erects upward, each fin 12Ad forms near the mode that the circular-arc wall 12Ab2 of portion from the bulge 12Ab of top extends to the 12Ae of wall portion, so can further improve in the vibrating membrane 12 the fixedly rigidity of the near zone of the part of the short side part 14B of voice coil loudspeaker voice coil 14.
In addition, the electroacoustic transducing device 10 that present embodiment relates to, because its vibrating membrane 12 is made of central vibration section 12A and the ring-type vibration section 12B that engages with the 12Aa of outer peripheral edges portion of the vibration section 12A of these central authorities, these central vibration section 12A and ring-type vibration section 12B are more engaging by on the position of outer circumferential side than wall portion, so can constitute vibrating membrane 12 with central vibration section 12A and the ring-type vibration section 12B that material and thickness differ from one another.At this moment, in the present embodiment, because central vibration section 12A is made of the hard resin parts, ring-type vibration section 12B is made of the soft resin parts simultaneously, so can improve and have the fixedly rigidity of the central vibration section 12A of the part of voice coil loudspeaker voice coil 14, on the other hand, can reduce the rigidity of ring-type vibration section 12B.Thus, do not produce abnormal vibrations on the central vibration section 12A and make the vibration mark of ring-type vibration section 12B have surplus because can make, guarantee the reproduction band of abundant width so can suppress the rising of lowest resonance frequency, can further improve the acoustic characteristic of electroacoustic transducing device 10 thus.
In the above-described embodiment, illustrated 3 fin 12Ad on the short side direction of electroacoustic transducing device 10 across uniformly-spaced and the situation of on its long side direction, extending.But, as shown in Figure 8, also can adopt following structure, promptly the circular-arc wall 12Ab2 of portion from the bulge 12Ab of top forms in the mode of radial extension to the 12Ae of wall portion, perhaps, as shown in Figure 9, also can adopt following structure, promptly the mode that extends to the 12Ae of wall portion with the circular-arc wall 12Ab2 of portion from the bulge 12Ab of top forms.Under the situation that adopts such structure, also can improve in the vibrating membrane 12 the fixedly rigidity of the part near zone of the short side part 14B of voice coil loudspeaker voice coil 14.
In addition, in the above-described embodiment, illustrated that electroacoustic transducing device 10 is situations of the miniature loudspeaker about Breadth Maximum 20mm, but under the situation of big or small in addition loud speaker, or under the situation of the electroacoustic transducing device beyond this loud speaker of picture receiver etc., also can obtain the action effect identical by adopting the structure identical with above-mentioned execution mode with above-mentioned execution mode.
Claims (4)
1. electroacoustic transducing device, it has: vibrating membrane; Voice coil loudspeaker voice coil, it is fixed on the lower surface of this vibrating membrane; And framework, it is characterized in that from the outer peripheral edges portion of the above-mentioned vibrating membrane of below fixed support,
The outer shape of above-mentioned vibrating membrane is configured to roughly rectangle, simultaneously, the winding form of above-mentioned voice coil loudspeaker voice coil be set and the outer peripheral edges portion of above-mentioned vibrating membrane between across the roughly rectangle of predetermined distance,
Interval between the outer peripheral edges portion of the short side part of above-mentioned voice coil loudspeaker voice coil and above-mentioned vibrating membrane, be set at than the long leg of above-mentioned voice coil loudspeaker voice coil divide and the outer peripheral edges portion of above-mentioned vibrating membrane between the big value in interval,
In above-mentioned vibrating membrane, fix on the part of short side part of above-mentioned voice coil loudspeaker voice coil, form the fin that at least one inner space that makes above-mentioned voice coil loudspeaker voice coil and outer space are connected.
2. electroacoustic transducing device as claimed in claim 1 is characterized in that,
Be arranged in the part of above-mentioned vibrating membrane, form the top bulge that expands upward than the more inner all sides of part of fixing above-mentioned voice coil loudspeaker voice coil,
Part than fixing above-mentioned voice coil loudspeaker voice coil in above-mentioned vibrating membrane is more leaned on the position of outer circumferential side, forms the wall portion that erects upward,
Above-mentioned each fin forms near the mode that extends to above-mentioned wall portion from above-mentioned top bulge.
3. electroacoustic transducing device as claimed in claim 1 is characterized in that,
Be arranged in the part of above-mentioned vibrating membrane, form the top bulge that expands upward than the more inner all sides of part of fixing above-mentioned voice coil loudspeaker voice coil,
Part than fixing above-mentioned voice coil loudspeaker voice coil in above-mentioned vibrating membrane is more leaned on the position of outer circumferential side, forms the wall portion that erects upward,
Above-mentioned each fin forms in the mode that extends to above-mentioned wall portion from above-mentioned top bulge.
4. as claim 2 or 3 described electroacoustic transducing devices, it is characterized in that,
Above-mentioned vibrating membrane is made of central vibration section and the ring-type vibration section that engages with the outer peripheral edges portion of this central authorities vibration section,
These central vibration sections and ring-type vibration section are more to engage by on the position of outer circumferential side than above-mentioned wall portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005041761 | 2005-02-18 | ||
| JP2005041761A JP4567484B2 (en) | 2005-02-18 | 2005-02-18 | Electroacoustic transducer |
| JP2005-041761 | 2005-02-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1822714A true CN1822714A (en) | 2006-08-23 |
| CN1822714B CN1822714B (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610003547 Expired - Fee Related CN1822714B (en) | 2005-02-18 | 2006-02-13 | Electroacustic convertor |
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| Country | Link |
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| JP (1) | JP4567484B2 (en) |
| CN (1) | CN1822714B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105308986A (en) * | 2013-04-01 | 2016-02-03 | 日本先锋公司 | Speaker device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5082401B2 (en) * | 2006-11-17 | 2012-11-28 | 株式会社Ｊｖｃケンウッド | Speaker manufacturing method, speaker and speaker manufacturing jig |
| EP2343911B1 (en) * | 2008-10-27 | 2016-02-10 | Panasonic Intellectual Property Management Co., Ltd. | Speaker, speaker manufacturing method and speaker manufacturing jig |
| US8682021B2 (en) | 2009-02-09 | 2014-03-25 | Sanyo Electric Co., Ltd. | Speaker unit and portable information terminal |
| JP2012080209A (en) | 2010-09-30 | 2012-04-19 | Sanyo Electric Co Ltd | Diaphragm, speaker unit, and portable information terminal |
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| JPS5978795U (en) * | 1982-11-18 | 1984-05-28 | 松下電器産業株式会社 | rectangular cone speaker |
| JPS6137689U (en) * | 1984-08-13 | 1986-03-08 | パイオニア株式会社 | speaker |
| JP4000793B2 (en) * | 2001-07-13 | 2007-10-31 | オリエントサウンド株式会社 | Square speaker |
| JP4419352B2 (en) * | 2001-07-26 | 2010-02-24 | パナソニック株式会社 | Speaker |
| JP3896900B2 (en) * | 2002-05-28 | 2007-03-22 | ソニー株式会社 | Speaker device |
| JP4557495B2 (en) * | 2003-02-18 | 2010-10-06 | シチズン電子株式会社 | Electroacoustic transducer |
-
2005
- 2005-02-18 JP JP2005041761A patent/JP4567484B2/en active Active
-
2006
- 2006-02-13 CN CN 200610003547 patent/CN1822714B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105308986A (en) * | 2013-04-01 | 2016-02-03 | 日本先锋公司 | Speaker device |
| CN105308986B (en) * | 2013-04-01 | 2018-11-16 | 日本先锋公司 | Speaker unit |
| CN109327771A (en) * | 2013-04-01 | 2019-02-12 | 日本先锋公司 | Speaker unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1822714B (en) | 2011-10-19 |
| JP4567484B2 (en) | 2010-10-20 |
| JP2006229657A (en) | 2006-08-31 |
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