CN101426161A - Electroacoustic transducer - Google Patents
Electroacoustic transducer Download PDFInfo
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- CN101426161A CN101426161A CNA2008101752109A CN200810175210A CN101426161A CN 101426161 A CN101426161 A CN 101426161A CN A2008101752109 A CNA2008101752109 A CN A2008101752109A CN 200810175210 A CN200810175210 A CN 200810175210A CN 101426161 A CN101426161 A CN 101426161A
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Abstract
The present invention provides an electric electroacoustic transducer with a voice coil coiled to an approximate rectangular shape. The electroacoustic transducer uses a cheap structure for realizing the increasing of acoustic characteristic and simultaneously increasing the impact resistance capability. At the upper surface of bottom wall (32A) which forms an approximate box-shaped base (32) of magnetic loop unit (18), a positioning component (40) is installed and extends along the magnetic gap. The positioning component (40) forms a strip-plate shape through the notch part (32a) of each corner. The magnet (34) is positioned along the direction of base wall. Therefore the opening shape of notch part of each corner is reduced so that the air in the back space of vibrating film (12) not easily leaks to the outer space of base. Additionally, the stripping of bonding layer between the base wall of base and magnet and the breaking-off of the magnet from the base that are caused the impact load, etc. in the dropping of external device which is loaded with the electroacoustic transducer (10) are prevented.
Description
Technical field
The present invention relates to so-called power type electroacoustic transducing device, especially, relate to the electroacoustic transducing device that voice coil loudspeaker voice coil is wound as the essentially rectangular ring-type.
Background technology
Usually, power type electroacoustic transducing devices such as power type loud speaker constitute, and have: vibrating membrane; Voice coil loudspeaker voice coil, it is fixed on the lower surface of this vibrating membrane; The magnetic loop unit, the magnetic gap of the bottom of this voice coil loudspeaker voice coil is accommodated in its formation; And framework, the outer peripheral edges portion of this magnetic loop unit of its fixed support and vibrating membrane.
In " patent documentation 1 " and " patent documentation 2 ", put down in writing, in this power type electroacoustic transducing device,, be wound as the essentially rectangular ring-type as voice coil loudspeaker voice coil.And in these electroacoustic transducing devices of being put down in writing in this each patent documentation, its magnetic loop unit is by constituting with the lower part: the pedestal of box-shaped (in " patent documentation 2 ", being the metallic yoke) roughly, and it surrounds voice coil loudspeaker voice coil; Magnet, it is bonded and fixed at the upper surface of the underside wall of this pedestal; And yoke (being dull and stereotyped in " patent documentation 2 "), it is fixed on the upper surface of this magnet.
Patent documentation 1: the spy opens communique 2007-No. 60463
Patent documentation 2: the spy opens communique 2004-No. 128822
Summary of the invention
If adopt the electroacoustic transducing device that voice coil loudspeaker voice coil is wound as the essentially rectangular ring-type as mentioned above, then its profile also can be set at essentially rectangular, therefore, can improve the space availability ratio when carrying this electroacoustic transducing device on the external equipment of mobile phone etc.
At this moment, shown in the electroacoustic transducing device shown in Figure 7 of above-mentioned " patent documentation 2 ", if make the roughly structure of the pedestal of box-shaped (being metallic yoke 1), for underside wall and week each bight of facing the wall and meditating form the structure of notch respectively, then can form 4 linearity parts of facing the wall and meditating in its week by bending machining.Thus, compare, its cheapness and dimensional accuracy are formed higherly with form roughly the situation of the pedestal of box-shaped by punch forming.
But, in this electroacoustic transducing device, because via this notch in each bight of box-shaped roughly, the feasible backside space that is positioned at the lower face side of vibrating membrane is communicated with the space outerpace of pedestal, so when the vibrating membrane ring is moving, the air of this backside space is revealed to the space outerpace of pedestal from the notch in each bight.Therefore,, exist the sound press of lowest resonance frequency to rise significantly, can't guarantee the problem of sufficient acoustic characteristic as electroacoustic transducing device.
In addition, in above-mentioned electroacoustic transducing device, fall under the first-class situation in floor at the external equipment that is equipped with this equipment, exist shock loading that the underside wall of pedestal and the tack coat between magnet (the perhaps coating of implementing at magnet surface) are peeled off owing to this moment, thus the problem that magnet comes off from pedestal.
Especially, on electroacoustic transducing device with the voice coil loudspeaker voice coil that is wound as the essentially rectangular ring-type, because the profile of its magnet also is essentially rectangular and non-circular, thus with have the common electrical acoustic transformer that is wound as circular voice coil loudspeaker voice coil and compare the problem that exists magnet to come off easily.
And, in electroacoustic transducing device in recent years, require higher acoustic characteristic, in order to realize this requirement, there is the tendency that increases magnet as far as possible and improve the electroacoustic conversion efficiency.Therefore, exist because the problem that the inertial load of the magnet of maximization makes tack coat etc. be more prone to peel off.
The present invention In view of the foregoing proposes, and its purpose is to provide a kind of electroacoustic transducing device, and it utilizes cheap structure on the power type electroacoustic transducing device that voice coil loudspeaker voice coil is wound as the essentially rectangular ring-type, realize the raising of its acoustic characteristic, and improves impact resistance.The present invention is the structure that can utilize bending machining formation pedestal, and, have the structure of the positioning element of regulation by employing, realize above-mentioned purpose.
That is to say, the electroacoustic transducing device that the present invention relates to, it has: vibrating membrane; Voice coil loudspeaker voice coil, it is fixed on the lower surface of this vibrating membrane; The magnetic loop unit, the magnetic gap of the bottom of this voice coil loudspeaker voice coil is accommodated in its formation; And framework, the outer peripheral edges portion of this magnetic loop unit of its fixed support and above-mentioned vibrating membrane,
It is characterized in that,
Above-mentioned voice coil loudspeaker voice coil is wound as the essentially rectangular ring-type,
Above-mentioned magnetic loop unit has: the pedestal of box-shaped roughly, and it surrounds above-mentioned voice coil loudspeaker voice coil; Magnet, it is bonded and fixed at the upper surface of the underside wall of this pedestal; And yoke, it is fixed on the upper surface of this magnet,
In the underside wall of said base and each bight of facing the wall and meditating in week, form notch respectively,
Upper surface at the underside wall of said base is provided with positioning element, and it extends along above-mentioned magnetic gap, and form bar via the notch in above-mentioned each bight tabular, and this positioning element positions above-mentioned magnet on the direction of the underside wall of this pedestal.
So long as form the backside space that makes vibrating membrane and be communicated with the space outerpace of pedestal and get final product, its concrete shape or size are not particularly limited above-mentioned " notch ".
Above-mentioned " positioning element " is tabular and along magnetic gap and via the otch in each bight, can be made of single parts as long as form bar, also can be made of a plurality of parts.
In addition, the concrete structure of the section shape of above-mentioned " positioning element " or material etc. is not particularly limited, for its height, so long as get final product in the scope that also can not interfere with respect to by peak swing at its vibrating membrane of the voice coil loudspeaker voice coil of vibration vibration of membrane and displacement downwards the time, its concrete numerical value is not particularly limited.
In addition, above-mentioned " positioning element " can be the structure of upper surface that is bonded and fixed at the underside wall of pedestal, also can be pressed into pedestal face the wall and meditate in week and magnet between structure.
The effect of invention
Shown in above-mentioned structure, the electroacoustic transducing device that the present invention relates to is as the electroacoustic transducing device of power type and constitute, because its voice coil loudspeaker voice coil is wound as the essentially rectangular ring-type, so can be easily the outer shape of electroacoustic transducing device be set at essentially rectangular.Thereby, can improve the space availability ratio when carrying this electroacoustic transducing device on the external equipments such as mobile phone.
In addition, the electroacoustic transducing device that the present invention relates to, its magnetic loop unit has the roughly pedestal of box-shaped, because this pedestal is to form the structure of otch respectively at its underside wall and all each bights of facing the wall and meditating, so can form 4 straight line portioies of facing the wall and meditating in its week by bending machining.Therefore, compare with form roughly the situation of box-shaped pedestal by punch forming, its can cheapness and dimensional accuracy form higherly.
On this basis, the electroacoustic transducing device that the present invention relates to, because the upper surface at the diapire face of its pedestal is provided with positioning element, its magnetic gap along the magnetic loop unit extends, and form bar via the notch in each bight tabular, on the direction of the underside wall of this pedestal, magnet is being positioned, so, following action effect can be obtained.
That is to say, can utilize the tabular positioning element of bar that disposes via the notch in each bight, reduce to make the opening shape of the notch in each bight that the backside space of vibrating membrane is communicated with the space outerpace of pedestal, thereby the air of backside space can easily not revealed to space outerpace.Therefore, as electroacoustic transducing device, can prevent in advance that the sound press of lowest resonance frequency from rising significantly, thereby can guarantee sufficient acoustic characteristic.At this moment, the amount of suppression that the sound press of lowest resonance frequency rises can carry out suitable adjustment by the thickness of positioning element etc.
In addition, because utilize the positioning element of the upper surface that is arranged at the base bottom surface wall, realization is along the location of the magnet of the direction of this underside wall, so the shock loading in the time of can preventing the whereabouts etc. owing to the external equipment that has carried electroacoustic transducing device is in advance peeled off tack coat between base bottom surface wall and the magnet coating of magnet surface (or be implemented on), thereby magnet comes off from pedestal.
That is to say, in effect under the situation of the load of the underside wall direction of pedestal, the easiest coming off such as tack coat between base bottom surface wall and magnet, but the electroacoustic transducing device that the present invention relates to, because utilize its positioning element to carry out along the magnet location of the direction of base bottom surface wall, even, can prevent in advance that also magnet from coming off from pedestal so act under the situation of this load.
As mentioned above,,, can utilize cheap structure to realize the raising of its acoustic characteristic, improve impact resistance simultaneously for the power type electroacoustic transducing device of outer shape with essentially rectangular according to the present invention.
In addition, in the electroacoustic transducing device that the present invention relates to, by setting positioning element, even under the situation of effect and the shock loading of the direction of the underside wall quadrature of pedestal along its magnetic gap, also can utilize the withstand effect of voice coil loudspeaker voice coil and positioning element, stop the voice coil loudspeaker voice coil excess in displacement.Thus, can prevent in advance that the adhesive segment of voice coil loudspeaker voice coil and vibrating membrane from peeling off.
In said structure, as mentioned above, the material of " positioning element " is not particularly limited, if but its non-magnetic part by for example synthetic resin or aluminium etc. is constituted, then can avoid the magnetic circuit that is formed at the magnetic loop unit being caused dysgenic possibility because positioning element is set.
In said structure,, then the quantity of the parts that must increase newly in order to obtain action effect of the present invention can be suppressed to Min. if constitute " positioning element " by endless member.
On the other hand, in said structure, if constitute " positioning element ", even the dimensional accuracy of then not strict these each parts of control or pedestal etc. can be to extend along magnetic gap with this each component configuration also by 1 pair of U word shape parts or 4 L word shape parts.
In said structure, if constitute face the wall and meditate in the week of positioning element and pedestal between and fill bonding agent respectively between positioning element and the magnet, even then the width setup with positioning element is less than a certain amount of value of magnetic gap width, also can utilize the existence of bonding agent, realization is along the location of the magnet on the direction of the underside wall of pedestal.Thus, can loosen the control of the dimensional accuracy of positioning element or pedestal etc.
In addition, as mentioned above, by constitute face the wall and meditate in the week of positioning element and pedestal between and fill bonding agent respectively between the positioning element magnet, because can increase the bond area of magnet and other parts, thus can improve with the direction of the diapire face quadrature of pedestal on the slip-off preventing performance of magnet under the situation of effect shock loading.
Description of drawings
Fig. 1 is with the vertical view of the state representation of configuration up with electroacoustic transducing device that an embodiment of the invention are related to.
Fig. 2 is II-II line profile of Fig. 1.
Fig. 3 is III-III line profile of Fig. 1.
Fig. 4 is IV-IV line sectional detail drawing of Fig. 1.
Fig. 5 is the oblique view that the magnetic loop unit of above-mentioned electroacoustic transducing device is represented with positioning element.
Fig. 6 is the vertical view that above-mentioned magnetic loop unit is represented with above-mentioned positioning element.
Fig. 7 is the figure identical with Fig. 6 that wants portion of the electroacoustic transducing device that relates to of variation of the above-mentioned execution mode of expression.
Embodiment
Below, use accompanying drawing that embodiments of the present invention are described.
Fig. 1 is with the vertical view of the state representation of configuration up with electroacoustic transducing device 10 that an embodiment of the invention are related to.In addition, Fig. 2 is II-II line profile of Fig. 1, and Fig. 3 is III-III line profile of Fig. 1, and Fig. 4 is IV-IV line profile of Fig. 1.
As shown in these figures, this electroacoustic transducing device 10 is small-sized power type loud speaker, and it uses with the state that carries on the external equipment such as mobile phone.This electroacoustic transducing device 10 has overlooks the outer shape that is viewed as the long essentially rectangular of left and right directions summary, and the width setup of its long side direction is about 20mm, and the width setup of short side direction is the value about 15mm.
This electroacoustic transducing device 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, the outer peripheral edges portion of its fixed support vibrating membrane 12; Magnetic loop unit 18, the magnetic gap of the bottom of voice coil loudspeaker voice coil 14 is accommodated in its formation; Cover 20, it covers vibrating membrane 12 from upper side; And 1 pair of terminal component 22, it is fixed on the framework 16.
Vibrating membrane 12 has the outer shape of the essentially rectangular of the profile that is slightly less than electroacoustic transducing device 10.This vibrating membrane 12 is made of the resin parts of Polyetherimide etc.This vibrating membrane 12 forms tabular, and the position forms as top protuberance 12a near its outer peripheral edges, and it extends with the essentially rectangular ring-type for circular-arc section shape upwards.
The winding form of voice coil loudspeaker voice coil 14 is set at essentially rectangular.So-called essentially rectangular is the rectangle that has fillet.This voice coil loudspeaker voice coil 14 is fixing with respect to vibrating membrane 12, bonds near the interior all sides by protuberance 12a above it and carries out.And this voice coil loudspeaker voice coil 14 is via being electrically connected with 1 pair of terminal component 22 from these voice coil loudspeaker voice coil 14 extended 1 pair of voice coil loudspeaker voice coil ends (not shown).
1 pair of terminal component 22 is by constituting with the lower part: 1 couple of welding disk 22A, and it is integrally formed with framework 16 by embedding moulding; And 1 couple of helical spring 22B, it protrudes downwards from framework 16.1 couple of welding disk 22A forms, and exposes to the lower surface of a short side part side of framework 16.In addition, 1 couple of helical spring 22B is configured in 2 bights of a short side part side of framework 16, via being electrically connected of these helical springs 22B realization and external equipment.
The steel plate of plate-like forms cover 20 by forming roughly, has and overlooks the outer shape that is viewed as essentially rectangular.On this cover 20, form sound hole 20a in a plurality of positions.And this cover 20 is bonded and fixed in the outer peripheral edges portion of vibrating membrane 12 in its outer peripheral edges portion, and this vibrating membrane 12 is bonded and fixed on the vibrating membrane support portion 16a of framework 16.
Fig. 5 is that Fig. 6 is its vertical view with the oblique view of magnetic loop unit 18 with positioning element 40 (for these parts as described later) expression.
As shown in these figures, magnetic loop unit 18 is the magnetic loop unit of internal magnetic type, and it has: the pedestal 32 of box-shaped roughly, and it surrounds voice coil loudspeaker voice coil 14; Magnet 34, it is bonded and fixed at the upper surface of the underside wall 32A of this pedestal 32; And yoke 36, it is bonded and fixed at the upper surface of this magnet 34.What is called is box-shaped roughly, is the box-shaped that has fillet.And, in this magnetic loop unit 18, between the outer peripheral face of the inner surface of the 32B that faces the wall and meditates in the week of its pedestal 32 and yoke 36, form above-mentioned magnetic gap.
That is to say that the rectangle extension 2a to utilizing stamping-out to be processed to form utilizes bending machining to bend to the right angle upward, form the 32B that faces the wall and meditates in each week of pedestal 32 thus.And, on sheet metal 2, cut off in the end of its pedestal 32 sides and form pedestal 32 by linking beam 2c 4, these 4 link beam 2c from the notch 32a in each bight of pedestal 32 with radial extension, link residual 2b of thin plate of pedestal 32 and this pedestal 32 of encirclement.
At the upper surface of the underside wall 32A of this pedestal 32, the positioning element 40 that extends along above-mentioned magnetic gap is set.This positioning element 40 via the notch 32a in each bight of pedestal 32 and to form bar tabular, along on the direction (being horizontal direction) of the underside wall 32A of pedestal 32, positions magnet 34.
This positioning element 40 is made of the non-magnetic part of synthetic resin system (for example pet resin (PET) system), and the shape with roughly the same with the winding form of voice coil loudspeaker voice coil 14 is formed extended at both sides with the essentially rectangular ring-type.And this positioning element 40 utilizes adhesive A to be bonded and fixed at the upper surface of the underside wall 32A of pedestal 32 at its lower surface.
At this moment, the width of this positioning element 40 is set at than the smaller value in interval (promptly roughly the same with above-mentioned magnetic gap interval) between the outer peripheral face of the inner surface of the 32B that faces the wall and meditates in the week of pedestal 32 and magnet 34.In addition, the height of this positioning element 40 is set at the value more smaller than its width.Thus, for the voice coil loudspeaker voice coil 14 of displacement downwards, even positioning element 40 can not interfered yet when the peak swing of its vibration owing to the vibration of vibrating membrane 12.
Between the inner surface of the 32B that faces the wall and meditates in week of this positioning element 40 and pedestal 32 and between the outer peripheral face of this positioning element 40 and magnet 34, fill adhesive A respectively.The filling of this adhesive A is when the lower surface with positioning element 40 is bonded and fixed at the upper surface of underside wall 32A of pedestal 32, adhesive A is prolonged to the two sides of positioning element 40 lateral bine surround and carry out.
As described in detail above, the electroacoustic transducing device 10 that the present invention relates to constitutes as the power type loud speaker, because its voice coil loudspeaker voice coil 14 is wound as the essentially rectangular ring-type, so can be easily the profile of electroacoustic transducing device 10 be set at essentially rectangular.Thereby, can improve the space availability ratio when carrying this electroacoustic transducing device 10 on the external equipment of mobile phone etc.
In addition, the electroacoustic transducing device 10 that the present invention relates to, its magnetic loop unit 18 has the roughly pedestal 32 of box-shaped, but because this pedestal 32 is to form the structure of notch 32a respectively on its underside wall 32A and each bight of 32B of facing the wall and meditating in week, so can utilize bending machining to form to face the wall and meditate in its week 4 linearity parts of 32B.Therefore, compare with form roughly the situation of the pedestal 32 of box-shaped by punch forming, its can cheapness and dimensional accuracy form higherly.
And, the electroacoustic transducing device 10 that present embodiment relates to, because the upper surface at the underside wall 32A of its pedestal 32 is provided with positioning element 40, its magnetic gap along magnetic loop unit 18 extends, form bar simultaneously via the notch 32a in each bight tabular, along on the direction of the underside wall 32A of this pedestal 32 magnet 34 being positioned, so can obtain the following effects effect.
That is to say, the positioning element 40 that utilization is provided with via the notch 32a in each bight, can reduce to make the opening shape of the notch 32a in each bight that the backside space of vibrating membrane 12 is communicated with the space outerpace of pedestal 32, thereby the air of backside space can easily not revealed to the space outerpace of pedestal 32.Therefore, as electroacoustic transducing device 10, can prevent in advance that the sound press of lowest resonance frequency from rising significantly, thereby can guarantee sufficient acoustic characteristic.
At this moment, the amount of suppression that the sound press of lowest resonance frequency rises can utilize the thickness etc. of positioning element 40 suitably to adjust.That is to say,, as shown in Figure 4, can make the width up and down of the opening shape on the notch 32a that is formed at each bight, deduct the narrow h1 of width up and down of positioning element 40 thickness for initial width h0 up and down by this positioning element 40 is set.At this moment, by the thickness of increase and decrease positioning element 40, can adjust the value of width h1 up and down.
In addition, because can utilize the positioning element 40 of the upper surface of the underside wall 32A that is arranged on pedestal 32, direction along its underside wall 32A positions magnet 34, so can prevent in advance owing to carried the shock loading of the external equipment whereabouts etc. of electroacoustic transducing device 10, and the tack coat (or coating of implementing on the surface of magnet 34) of 34 of the underside wall 32A of pedestal 32 and magnet is peeled off, thereby magnet 34 comes off from pedestal 32.
That is to say, in effect along under the situation of the load of the direction of the underside wall 32A of pedestal 32, the easiest the peeling off such as tack coat that the underside wall 32A of pedestal 32 and magnet are 34, but the electroacoustic transducing device 10 that present embodiment relates to, realize the location of the magnet 34 on the direction of the underside wall 32A of pedestal 32 because can utilize its positioning element 40, even so under the situation of the above-mentioned load of effect, can prevent in advance that also magnet 34 from coming off from pedestal 32.
As mentioned above,, in the power type electroacoustic transducing device 10 of outer shape, can utilize cheap structure to realize the raising of its acoustic characteristic, improve impact resistance simultaneously with essentially rectangular according to present embodiment.
In addition, in the electroacoustic transducing device 10 that present embodiment relates to, by disposing positioning element 40 along its magnetic gap, even under the situations such as shock loading of effect and the direction of the underside wall 32A quadrature of pedestal 32, also can utilize the withstand effect of voice coil loudspeaker voice coil 14 and positioning element 40, stop the excess in displacement of voice coil loudspeaker voice coil 14.And, can prevent in advance that thus the adhesive segment of voice coil loudspeaker voice coil 14 and vibrating membrane 12 from peeling off.
In addition, in the electroacoustic transducing device 10 that present embodiment relates to, because constitute its positioning element 40, so can not worry the magnetic circuit that is formed in the magnetic loop unit 18 to be caused harmful effect because of this positioning element 40 is set by plastic non-magnetic part.In addition, because this positioning element 40 is made of endless member, so the number of components that must increase newly for the action effect that obtains present embodiment can be suppressed to Min..
In addition, in the electroacoustic transducing device 10 that present embodiment relates to, because its positioning element 40 and pedestal 32 face the wall and meditate in week between the 32B and between this positioning element 40 and the magnet 34, fill adhesive A respectively, even so be less than a certain amount of value of magnetic gap width with the width setup of positioning element 40, also can be by the existence of adhesive A, be implemented in along the location of the magnet 34 on the direction of the underside wall 32A of pedestal 32.And can loosen the control of the dimensional accuracy of positioning element 40 or magnet 34 thus.
In addition, as mentioned above, face the wall and meditate in week between the 32B and the structure of filling adhesive A between this positioning element 40 and the magnet 34 respectively by adopting at positioning element 40 and pedestal 32, because can increase the bond area of magnet 34 and other parts, thus can improve with the direction of the underside wall 32A quadrature of pedestal 32 on the slip-off preventing performance of magnet 34 under the situation of effect shock loading.
In addition, in the above-described embodiment, illustrated that positioning element 40 is made of endless member, but also can replace this endless member, use the parts of the cut roughly C word shape of its part, in this case, also can obtain the action effect identical with above-mentioned execution mode.
Below, describe for the variation of above-mentioned execution mode.
Fig. 7 is the figure identical with Fig. 6 that wants portion of the electroacoustic transducing device that relates to of this variation of expression.
This figure (a) is the figure that the positioning element that the 1st variation relates to is represented with magnetic loop unit 18, and this figure (b) is the figure that the positioning element that the 2nd variation relates to is represented with magnetic loop unit 18.
Shown in this figure (a), the positioning element that the 1st variation relates to is made of 1 couple of U word shape parts 140A, 140B, and they have mutually the same shape.These each U word shape parts 140A, 140B be along the magnetic gap of magnetic loop unit 18, divides to long leg from its short side part and surround and extend, and divides central authorities at its long leg, forms certain clearance between the two.
In addition, material and the section shape of these each U word shape parts 140A, 140B are identical with the positioning element 40 of above-mentioned execution mode.In addition, these each U word shape parts 140A, 140B, with above-mentioned execution mode in the same manner, utilize adhesive A to be bonded and fixed at the upper surface of the underside wall 32A of pedestal 32 at its lower surface, simultaneously, these each U word shape parts 140A, 140B and pedestal 32 face the wall and meditate in week between the 32B and each U word shape parts 140A, 140B and magnet 34 between fill adhesive A respectively.
By adopting the structure of present embodiment,, also can be configured to it is extended along magnetic gap even the dimensional accuracy of each U word shape parts 140A, 140B is not controlled by strictness.
In addition, because these each U word shape parts 140A, 140B all are of similar shape,, can be configured efficiently so there is not the possibility of mistake assembling.
In addition, under the situation of the structure that adopts this variation, because constitute 1 couple of U word shape parts 140A, 140B of positioning element, extend via the notch 32a in each bight, so the air of the backside space of vibrating membrane 12 can easily not revealed to the space outerpace of pedestal 32.
Shown in this figure (b), the positioning element that the 2nd variation relates to is made of 4 L word shape parts 240A, 240B, 240C, 240D, and they all are of similar shape.These each L word shape parts 240A, 240B, 240C, 240D are along the magnetic gap of magnetic loop unit 18, from its bight to short side part and long leg branch, in the length range of regulation, extend, divide central authorities, between separately, form the gap in its short side part central authorities and long leg.At this moment, to the protrusion length that short side part and long leg divide, be set at mutually the same value to these each L word shape parts 240A, 240B, 240C, 240D.
In addition, material and the section shape of these each L word shape parts 240A, 240B, 240C, 240D are identical with the positioning element 40 of above-mentioned execution mode.In addition, these each L word shape parts 240A, 240B, 240C, 240D, with the situation of above-mentioned execution mode in the same manner, utilize adhesive A to be bonded and fixed at the upper surface of the underside wall 32A of pedestal 32 at its lower surface, simultaneously, these each L word shape parts 240A, 240B, 240C, 240D and pedestal 32 face the wall and meditate in week between the 32B and each L word shape parts 240A, 240B, 240C, 240D and magnet 34 between fill adhesive A respectively.
Under the situation that adopts this variation, even the dimensional accuracy of not strict each L word shape parts of control 240A, 240B, 240C, 240D also can be configured to they are extended along magnetic gap.
And because these each L word shape parts 240A, 240B, 240C, 240D all are of similar shape, and the length of two direction is set to identical value, so there is not the possibility of mistake assembling, can carry out its configuration efficiently.Especially, when configuration this each L word shape parts 240A, 240B, 240C, 240D, so long as in its scope of not interfering mutually, then can be set and be mutually different shape.
In addition, under the situation of the structure that adopts this variation, because constitute 4 L word shape parts 240A, 240B, 240C, the 240D of its positioning element, the air of the backside space of vibrating membrane 12 extends via the notch 32a in each bight, so can easily not revealed to the space outerpace of pedestal 32.
In above-mentioned execution mode and each variation, situation about positioning element 40, each U word shape parts 140A, 140B, each L word shape parts 240A, 240B, 240C, 240D being bonded and fixed on the underside wall 32A of pedestal 32 describes, but also can be the structure between the outer peripheral face of their face the wall and meditate in week 32B and magnet 34 of being pressed into pedestal 32.
By adopting this structure, even not these positioning elements 40, each U word shape parts 140A, 140B, each L word shape parts 240A, 240B, 240C, 240D and pedestal 32 face the wall and meditate in week between the 32B and these positioning elements 40, each U word shape parts 140A, 140B, each L word shape parts 240A, 240B, 240C, 240D and magnet 34 between fill adhesive A, also can be implemented in the location of the magnet 34 on the direction of the underside wall 32A of pedestal 32.
Especially, in above-mentioned the 1st variation, because be the structure that positioning element is split into 1 couple of U word shape parts 140A, 140B, it is pressed into operation so can easily be carried out, in addition, in above-mentioned the 2nd variation,, be pressed into operation so it can be carried out more easily because be the structure that positioning element is split into 4 L word shape parts 240A, 240B, 240C, 240D.
In addition, in above-mentioned execution mode and each variation, only be an example as the numerical value shown in each key element, can certainly suitably they be set at different values.
In above-mentioned execution mode and each variation, electroacoustic transducing device 10 is illustrated for the situation of loud speaker, but at it is under the situation of the electroacoustic transducing device except loud speaker such as receiver, also can obtain and identical action effect such as above-mentioned execution mode by adopting the structure identical with above-mentioned execution mode.
Claims (9)
1. electroacoustic transducing device, it has: vibrating membrane; Voice coil loudspeaker voice coil, it is fixed on the lower surface of this vibrating membrane; The magnetic loop unit, the magnetic gap of the bottom of this voice coil loudspeaker voice coil is accommodated in its formation; And framework, the outer peripheral edges portion of this magnetic loop unit of its fixed support and above-mentioned vibrating membrane,
It is characterized in that,
Above-mentioned voice coil loudspeaker voice coil is wound as the essentially rectangular ring-type,
Above-mentioned magnetic loop unit has: the pedestal of box-shaped roughly, and it surrounds above-mentioned voice coil loudspeaker voice coil; Magnet, it is bonded and fixed at the upper surface of the underside wall of this pedestal; And yoke, it is fixed on the upper surface of this magnet,
In the underside wall of said base and each bight of facing the wall and meditating in week, form notch respectively,
Upper surface at the underside wall of said base is provided with positioning element, it extends along above-mentioned magnetic gap, and form bar via the notch in above-mentioned each bight tabular, and this positioning element positions above-mentioned magnet on the direction of the underside wall of this pedestal with respect to this pedestal.
2. electroacoustic transducing device as claimed in claim 1 is characterized in that,
Above-mentioned positioning element is made of non-magnetic part.
3. electroacoustic transducing device as claimed in claim 1 is characterized in that,
Above-mentioned positioning element is made of endless member.
4. electroacoustic transducing device as claimed in claim 2 is characterized in that,
Above-mentioned positioning element is made of endless member.
5. electroacoustic transducing device as claimed in claim 1 is characterized in that,
Above-mentioned positioning element is made of 1 pair of U word shape parts.
6. electroacoustic transducing device as claimed in claim 2 is characterized in that,
Above-mentioned positioning element is made of 1 pair of U word shape parts.
7. electroacoustic transducing device as claimed in claim 1 is characterized in that,
Above-mentioned location division is made of 4 L word shape parts.
8. electroacoustic transducing device as claimed in claim 2 is characterized in that,
Above-mentioned location division is made of 4 L word shape parts.
9. as any described electroacoustic transducing device in the claim 1 to 4, it is characterized in that,
Between facing the wall and meditating in the week of above-mentioned positioning element and said base and between above-mentioned positioning element and the above-mentioned magnet, fill bonding agent respectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007282512A JP2009111792A (en) | 2007-10-30 | 2007-10-30 | Electroacoustic transducer |
| JP2007282512 | 2007-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101426161A true CN101426161A (en) | 2009-05-06 |
Family
ID=40616447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101752109A Pending CN101426161A (en) | 2007-10-30 | 2008-10-30 | Electroacoustic transducer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009111792A (en) |
| CN (1) | CN101426161A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626535B (en) * | 2009-08-17 | 2014-06-18 | 瑞声声学科技(深圳)有限公司 | Sounder |
| CN106537937A (en) * | 2014-07-15 | 2017-03-22 | 诺基亚技术有限公司 | Sound transducer |
| CN109195078A (en) * | 2018-08-09 | 2019-01-11 | 瑞声科技(新加坡)有限公司 | Microphone device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003037892A (en) * | 2001-07-26 | 2003-02-07 | Matsushita Electric Ind Co Ltd | Speaker |
| JP2004128822A (en) * | 2002-10-01 | 2004-04-22 | Sanyo Electric Co Ltd | Speaker unit |
| JP2007060463A (en) * | 2005-08-26 | 2007-03-08 | Star Micronics Co Ltd | Electroacoustic transducer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004356976A (en) * | 2003-05-29 | 2004-12-16 | Matsushita Electric Ind Co Ltd | Speaker |
| JP2005323094A (en) * | 2004-05-07 | 2005-11-17 | Kenwood Corp | Speaker unit |
-
2007
- 2007-10-30 JP JP2007282512A patent/JP2009111792A/en active Pending
-
2008
- 2008-10-30 CN CNA2008101752109A patent/CN101426161A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003037892A (en) * | 2001-07-26 | 2003-02-07 | Matsushita Electric Ind Co Ltd | Speaker |
| JP2004128822A (en) * | 2002-10-01 | 2004-04-22 | Sanyo Electric Co Ltd | Speaker unit |
| JP2007060463A (en) * | 2005-08-26 | 2007-03-08 | Star Micronics Co Ltd | Electroacoustic transducer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626535B (en) * | 2009-08-17 | 2014-06-18 | 瑞声声学科技(深圳)有限公司 | Sounder |
| CN106537937A (en) * | 2014-07-15 | 2017-03-22 | 诺基亚技术有限公司 | Sound transducer |
| CN109195078A (en) * | 2018-08-09 | 2019-01-11 | 瑞声科技(新加坡)有限公司 | Microphone device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009111792A (en) | 2009-05-21 |
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Application publication date: 20090506 |