CN102067629B - Electromagnetic converter - Google Patents
Electromagnetic converter Download PDFInfo
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- CN102067629B CN102067629B CN200980122488.2A CN200980122488A CN102067629B CN 102067629 B CN102067629 B CN 102067629B CN 200980122488 A CN200980122488 A CN 200980122488A CN 102067629 B CN102067629 B CN 102067629B
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- oscillating plate
- electromagnetic transducer
- coil pattern
- plate
- frame body
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- 230000004907 flux Effects 0.000 claims abstract description 13
- 239000012528 membrane Substances 0.000 claims description 28
- 230000002787 reinforcement Effects 0.000 claims description 12
- 239000003351 stiffener Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 10
- 230000008093 supporting effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000005405 multipole Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/025—Diaphragms comprising polymeric materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/027—Diaphragms comprising metallic materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/24—Tensioning by means acting directly on free portions of diaphragm or cone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
- H04R9/048—Construction in which the windings of the moving coil lay in the same plane of the ribbon type
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
A hollow inner section is formed when a pair of frames (16, 17) are combined, and a plate (38) which concentrates a magnetic flux is arranged on permanent magnets (32, 33) arranged inside the pair of frames (16, 17). In a diaphragm (21), a coil pattern (21b) which receives the magnetic flux from the plate (38) is formed on the vibrating film (21a), and the vibrating film (21a) having uniform thickness is formed as an uneven solid structure.
Description
Technical field
The present invention relates to permanent magnet and oscillating plate to combine, from audio signal, carry out the electromagnetic transducer of sound reproduction.
Background technology
In the existing electromagnetic transducer that permanent magnet and oscillating plate are combined, there is the electromagnetic transducer that permanent magnet and oscillating plate are configured in opposite directions, there is in addition the electromagnetic transducer that configures padded coaming between permanent magnet and oscillating plate.These permanent magnets, oscillating plate and padded coaming, cover in the mode being sandwiched by the member of framework etc., for example, be arranged on the casing of loud speaker.
The permanent magnet of this electromagnetic transducer has the banded magnet position (also referred to as multipole magnetization pattern) that is alternately configured to opposed polarity with fixed intervals.In addition, oscillating plate be be positioned at permanent magnet board different magnetic poles border gap, be called as the position in opposite directions of part of the neutral region in magnetic field, dispose the member of tortuous coil pattern.While flowing through voice signal in the tortuous coil pattern in oscillating plate configuration, the multipole magnetization pattern generation electromagnetic action of tortuous coil pattern and permanent magnet, according to Lay explicit law not,, oscillating plate vibrates.By this vibration, ambient air vibrates and produces sound wave.The sound wave of this generation radiates to the outside of electromagnetic transducer by the sound radiation hole of perforate in permanent magnet and framework, carries out audio reproduction (for example,, with reference to patent documentation 1).
In addition, disclose following structure, in order to prevent oscillating plate from repeatedly being vibrated, tortuous coil pattern is because metal fatigue breaks, and oscillating plate is given the reinforcements (for example,, with reference to patent documentation 2) such as member by rigidity.
In addition, in the prior art, exist with above-mentioned electromagnetic transducer same structure, replace above-mentioned permanent magnet and the thin speaker that is called as " ガ ム ー ゾ Application " that forms with bar-shaped magnet.In this ガ ム ー ゾ Application type loud speaker, alternately arrange adjacent bar-shaped magnet at interval with regulation with opposed polarity, by the pole configuration of bar-shaped magnet in opposite directions, be identical (the N utmost point and the N utmost point, or the S utmost point and the S utmost point), bar-shaped magnet is configured in central oscillating plate from both forward and reverse directions clamping.Other member forms with the member identical with above-mentioned electromagnetic transducer.Such thin speaker has oscillating plate, this oscillating plate is at the base material evaporation of the formations such as polyester, polyimides or is bonded with on the oscillating plate member of paper tinsel of metallic conductor of copper, aluminium etc., by etch configuration, there is coil pattern (for example,, with reference to non-patent literature 1).This thin speaker also carries out audio reproduction with the identical sound wave generation work of the electromagnetic transducer with above-mentioned.
In so existing electromagnetic transducer, use the oscillating plate of the writing board shape being formed by thin soft polymeric membrane.
Prior art document
Patent documentation
Patent documentation 1: No. 3192372 communiques of Japan Patent
Patent documentation 2: International Publication WO2003/073787 communique
Non-patent literature
The military male Knitting work in Yamamoto, ス ピ ー カ ー シ ス テ system, ラジオJi Intraoperative society, in July, 1997, development was capable.
; in above-mentioned existing electromagnetic transducer; the oscillating plate of the writing board shape that use consists of thin soft polymeric membrane, in the situation that low range is regenerated, has when oscillating plate vibrates oscillating plate to resonate and sends the problem of extraordinary noise.In addition, there is because oscillating plate resonates the problem of poor performance.
The present invention completes in order to solve above-mentioned problem just, and its object is to provide a kind of well behaved electromagnetic transducer that suppresses the generation of extraordinary noise.
Summary of the invention
Electromagnetic transducer of the present invention possesses: a pair of framework forms empty inside when combination; Permanent magnet, is configured in the inside of framework, is provided with the plate that makes flux concentration; And oscillating plate, to accept the mode of the concentrated magnetic flux by plate, in the long size side of vibrating membrane, dispose coil pattern, at the end face of above-mentioned vibrating membrane or bottom surface, dispose the coil pattern that this is linked between the coil pattern of long size side configuration, the even thickness of oscillating plate also forms the stereochemical structure of concaveconvex shape.
According to electromagnetic transducer of the present invention, oscillating plate even thickness also forms the stereochemical structure of concaveconvex shape, can make thus the rigidity of oscillating plate self improve, even in the situation that low range is regenerated, when vibration plate vibrates, be also difficult to produce the resonance of oscillating plate, can suppress the generation of extraordinary noise.In addition, because suppress the resonance of oscillating plate, so can improve performance.
Accompanying drawing explanation
Fig. 1 represents the outward appearance of the electromagnetic transducer of execution mode 1, and Fig. 1 (a) is outward appearance front view, and Fig. 1 (b) and Fig. 1 (c) are outward appearance end views, and Fig. 1 (d) is outward appearance rearview.
Fig. 2 means the cutaway view of structure of the electromagnetic transducer of execution mode 1, and Fig. 2 (a) is the A-A line cutaway view of Fig. 1 (a), and Fig. 2 (b) is the B-B line cutaway view of Fig. 1 (a).
Fig. 3 is the stereoscopic figure of the oscillating plate of execution mode 1.
Fig. 4 means the stereogram of outward appearance of other oscillating plate of the electromagnetic transducer of execution mode 1.
Fig. 5 means the stereogram of outward appearance of other oscillating plate of the electromagnetic transducer of execution mode 1.
Fig. 6 means the stereogram of outward appearance of other oscillating plate of the electromagnetic transducer of execution mode 1.
Fig. 7 means the stereogram of outward appearance of other oscillating plate of the electromagnetic transducer of execution mode 1.
Fig. 8 represents the outward appearance of the electromagnetic transducer of execution mode 2, and Fig. 8 (a) is outward appearance front view, and Fig. 8 (b) and Fig. 8 (c) are outward appearance end views, and Fig. 8 (d) is outward appearance rearview.
Fig. 9 means the cutaway view of structure of the electromagnetic transducer of execution mode 2, and Fig. 9 (a) is the C-C line cutaway view of Fig. 8 (a), and Fig. 9 (b) is the D-D line cutaway view of Fig. 8 (a).
Figure 10 is the stereoscopic figure of the oscillating plate of execution mode 2.
Figure 11 is the stereoscopic figure of other oscillating plate of the electromagnetic transducer of execution mode 2.
Figure 12 is the stereoscopic figure of other oscillating plate of the electromagnetic transducer of execution mode 2.
Figure 13 is the stereoscopic figure of other oscillating plate of the electromagnetic transducer of execution mode 2.
Embodiment
Below, in order to illustrate in greater detail the present invention, for for implementing mode of the present invention, according to accompanying drawing, describe.
Execution mode 1
Fig. 1 represents the outward appearance of the electromagnetic transducer 10 of embodiments of the present invention 1, Fig. 1 (a) means the front view of the outward appearance of electromagnetic transducer 10, Fig. 1 (b) means the end view of the outward appearance of the electromagnetic transducer 10 of observing from long size side, Fig. 1 (c) means the end view of the outward appearance of the electromagnetic transducer 10 of observing from short size side, and Fig. 1 (d) means the rearview of the outward appearance of electromagnetic transducer 10.
As shown in Fig. 1 (a), Fig. 1 (d), in electromagnetic transducer 10, in framework 15, on two sides, there is the sound radiation hole 15a forming across fixed intervals, as shown in Fig. 1 (b), Fig. 1 (c), framework 15 combines upper side frame body 16 and lower side frame body 17 and form.To have, in order illustrating, at upper side frame body 16 and lower side frame body 17, give upper and lower difference, but as shown in Fig. 1 (a) ~ Fig. 1 (d), the shape of upper side frame body 16 and lower side frame body 17 to be roughly the same, can be also the structure that has made to reverse up and down.
Fig. 2 means the cutaway view of structure of the electromagnetic transducer 10 of embodiments of the present invention 1, and Fig. 2 (a) is the cutaway view of the electromagnetic transducer 10 in situation about cutting off along the A-A line shown in Fig. 1 (a).
As shown in Figure 2 (a) shows, electromagnetic transducer 10 is configured to and comprises: framework 15, oscillating plate 21, oscillating plate supporting member 24, upside permanent magnet 32, downside permanent magnet 33, plate 38.Framework 15 is the body structures that form empty inside when upper side frame body 16 and lower side frame body 17 are combined, and in the empty inside of framework 15, to cover the mode of oscillating plate 21, oscillating plate supporting member 24, permanent magnet 32,33, plate 38, accommodates.
In addition, as shown in Figure 2 (a) shows, by tens of microns, the thin polymeric membrane to hundreds of microns forms oscillating plate 21, so that thickness roughly uniformly vibrating membrane 21a become concaveconvex shape stereochemical structure mode and form, on the surface of vibrating membrane 21a, be formed with the coil pattern 21b being formed by electric conductor.Coil pattern 21b carries out break-through by etching or compacting etc. to the paper tinsel of the electric conductor of copper, aluminium etc. and forms, and is bonded in the surface of vibrating membrane 21a.At the short size end of this oscillating plate 21 and the internal face of lower side frame body 17, oscillating plate supporting member 24 is installed, oscillating plate 21 is supported by lower side frame body 17 in the mode that can vibrate via oscillating plate supporting member 24.
In addition, as shown in Figure 2 (a) shows, at upper side frame body 16 and lower side frame body 17 internal face in opposite directions, dispose permanent magnet 32,33.Permanent magnet 32 is arranged on the internal face of side frame body 16, and permanent magnet 33 is arranged on the internal face of lower side frame body 17, is not configuring permanent magnet 33 with the position of permanent magnet 32 lower side frame body 17 in opposite directions.In addition, do not configuring permanent magnet 32 with the position of permanent magnet 33 upper side frame body 16 in opposite directions.Thus, permanent magnet 32,33 at the internal face in opposite directions of upper side frame body 16 and lower side frame body 17 mutually differently with interconnected and be mounted.
In addition, as shown in Figure 2 (a) shows, in the magnetic pole of permanent magnet 32, the face that is fixed on side frame body 16 is the N utmost point, the face relative with the face that is fixed on upper side frame body 16 is the S utmost point, in the magnetic pole of permanent magnet 33, the face that is fixed on lower side frame body 17 is the S utmost point, and the face relative with the face that is fixed on lower side frame body 17 is the N utmost point.Thus, permanent magnet 32,33 is magnetized in same pole orientation.
In addition, as shown in Figure 2 (a) shows, at the relative face of the face with being fixed on side frame body 16 of permanent magnet 32 and at the relative face of the face with being fixed on lower side frame body 17 of permanent magnet 33, mounting has plate 38, plate 38 to separate in the horizontal direction fixing interval alignment arrangements on a straight line.Plate 38 forms with the magnetic of iron plate etc., as the magnetic flux of permanent magnet 32,33 is played a role to the concentrated yoke of adjacent in the horizontal direction plate 38.
And then, as shown in Figure 2 (a) shows, the vibrating membrane 21a of oscillating plate 21, in the mode by between permanent magnet 33 and framework 15, between plate 38 and upper side frame body 16, between plate 38 and lower side frame body 17 and between plate 38, form concaveconvex shape, the rising of the bending of concaveconvex shape and sloping portion form substantially vertical.Coil pattern 21b is forming between framework 15 and plate 38 and between plate 38.By this structure, at the plate 38 by as yoke, make the concentrated position configuration of magnetic force have coil pattern (voice coil) 21b.
Fig. 2 (b) is the cutaway view of the electromagnetic transducer 10 in situation about having cut off along B-B line shown in Fig. 1 (a).As shown in Fig. 2 (b), between the long size end and lower side frame body 17 of oscillating plate 21, oscillating plate supporting member 24 is installed.In addition, as described above, in the short size end of oscillating plate 21, oscillating plate supporting member 24 is also installed.Thus, between the peripheral end of oscillating plate 21 and lower side frame body 17, oscillating plate supporting member 24 is installed, oscillating plate 21 via oscillating plate supporting member 24 in the mode that can vibrate by lower side frame body 17 supportings.
Fig. 3 is the stereogram of outward appearance of observing obliquely the oscillating plate 21 of execution mode 1.
As shown in Figure 3, in oscillating plate 21, vibrating membrane 21a forms the stereochemical structure of concaveconvex shape.On the surface of vibrating membrane 21a, the coil pattern 21b consisting of electric conductor forms meander-shaped.The two ends of coil pattern 21b are connected with outside, to the audio signal of the control part from not shown etc. is supplied with coil pattern 21b.
In addition, as shown in Figure 3, at the peripheral part of oscillating plate 21,21c， overlapping portion, the overlapping portion 21c that is formed with pleated forms vibrating membrane 21a pleated and makes superimposed thickness, can make thus the intensity of oscillating plate 21 peripheral parts improve.
Then, the operation principle for electromagnetic transducer 10 describes.
In electromagnetic transducer 10, between the plate 38 of permanent magnet 32,33 mountings, with high magnetic flux density, produce magnetic field.When coil pattern 21b oscillating plate 21 being supplied with to the electric current as audio signal from outside, by the magnetic flux of 38 of plates and the electric current flowing through in coil pattern 21b, have an effect, plate 38 on permanent magnet 32,33 and the coil pattern 21b electromagnetic coupled of oscillating plate 21, in coil pattern 21b, according to Fleming's rule, produce actuating force.By drive coil pattern 21b, thereby oscillating plate 21 vibrates, and by the vibration of oscillating plate 21, thereby the air in framework 15 vibrates.The vibration of the air in framework 15 is radiated to outside from sound radiation hole 15a as audio frequency vibration.
Then for the structure that improves the rigidity of oscillating plate 21, describe.
As shown in Figure 3, oscillating plate 21, by by formed the stereochemical structure of concaveconvex shape by the thickness vibrating membrane 21a that roughly film forms uniformly, is compared with the oscillating plate of existing writing board shape, and the rigidity of oscillating plate self improves.
In addition, as shown in Figure 3, at the peripheral part of oscillating plate 21, pleated ground forms vibrating membrane 21a, forms superimposed overlapping portion 21c, can make thus the rigidity of oscillating plate 21 peripheral parts improve.
Have again, if the structure that the rigidity of oscillating plate 21 is improved is that other structure also can.
The example of other structure here, improving for the rigidity that makes oscillating plate 21 describes.
Fig. 4 means other the stereogram of outward appearance of oscillating plate 21 of the electromagnetic transducer 10 of execution mode 1, replaces the overlapping portion 21c of Fig. 3, is formed with the coil pattern 21d that strengthens use.The coil pattern 21d that strengthens use between the coil pattern 21b of oscillating plate 21, be oscillating plate 21 convex form surface long dimensional directions and form with the short dimensional directions of long dimensional directions approximate right angle, electric separated with coil pattern 21b and form.
Fig. 5 means other the stereogram of outward appearance of oscillating plate 21 of the electromagnetic transducer 10 of execution mode 1, replaces the reinforcement coil pattern 21d of Fig. 4, is formed with reinforcement 21e.Reinforcement 21e between the coil pattern 21b on oscillating plate 21 surfaces, be that the short dimensional directions of the convex form upper surface of oscillating plate 21 is formed with groove shape.
Fig. 6 means other the stereogram of outward appearance of oscillating plate 21 of the electromagnetic transducer 10 of execution mode 1, replaces the overlapping portion 21c of Fig. 3, is formed with stiffener 21f.The material that stiffener 21f is equal by the material with oscillating plate 21 or proportion is little forms, and to link the mode each other of adjacent long size end of the convex form of oscillating plate 21, arranges, and the convex form of oscillating plate 21 is strengthened.
Fig. 7 means other the stereogram of outward appearance of oscillating plate 21 of the electromagnetic transducer 10 of execution mode 1, replaces the stiffener 21f of Fig. 6, is provided with stiffener 21g.The material that stiffener 21g is equal by the material with oscillating plate 21 or proportion is little forms, and in the internal face of convex form or the outside wall surface setting of convex form of oscillating plate 21, the convex form of oscillating plate 21 is strengthened.Have again, although not shown, in the situation that stiffener 21g is set along the internal face of oscillating plate 21, permanent magnet 32,33 and plate 38 become to be cut apart or the structure of incised notch, even if become oscillating plate 21 vibrations, the structure that stiffener 21g does not also contact with plate 38, permanent magnet 32,33.
As mentioned above, according to the electromagnetic transducer 10 of execution mode 1, oscillating plate 21 forms the stereochemical structure of concaveconvex shape by the thickness vibrating membrane 21a that roughly film forms uniformly, and the coil pattern 21b of the magnetic flux that acceptance is concentrated by plate 38 forms on vibrating membrane, can make thus the rigidity of oscillating plate 21 self improve, even in the situation that low range is regenerated, oscillating plate 21 is difficult to produce the resonance of oscillating plate 21 when vibration, can obtain the effect of the generation that can suppress extraordinary noise.In addition, because suppress the resonance of oscillating plate 21, so the effect that performance performance improves.
In addition, according to the electromagnetic transducer 10 of execution mode 1, by the peripheral part at oscillating plate 21, vibrating membrane 21a is formed to pleated, form superimposed overlapping portion 21c, thereby the rigidity of oscillating plate 21 peripheral parts improves and oscillating plate 21 is indeformable, can obtain the effect of the generation of further inhibition extraordinary noise.
In addition, according to the electromagnetic transducer 10 of execution mode 1, surface by the convex form at oscillating plate 21 is formed with the reinforcement coil pattern 21d separated with coil pattern 21b electricity, thereby the rigidity of oscillating plate 21 improves and oscillating plate 21 is indeformable, can obtain the effect of the generation that suppresses extraordinary noise.
In addition, according to the electromagnetic transducer 10 of execution mode 1, by between the coil pattern 21b on oscillating plate 21 surfaces, be the reinforcement 21e that the upper surface of convex form is formed with groove shape, thereby the rigidity of oscillating plate 21 improves and oscillating plate 21 is indeformable, can obtain the effect of the generation that suppresses extraordinary noise.
In addition, according to the electromagnetic transducer 10 of execution mode 1, stiffener 21f, 21g that material equal by the material with by with oscillating plate 21 or that proportion is little forms strengthen the convex form of oscillating plate 21, thereby the rigidity of oscillating plate 21 improves and oscillating plate 21 is indeformable, can obtain the effect of the generation that suppresses extraordinary noise.
And then, by being formed generally perpendicularly the riser portions of the concaveconvex shape of oscillating plate 21, thereby can make the magnetic gap of 32,33 of permanent magnets narrow, can increase the magnetic flux density of magnetic circuit.
Execution mode 2
In execution mode 1, for the structure that a plurality of permanent magnets 32,33 are set, be illustrated, but in execution mode 2, for by the compact in size of electromagnetic transducer 10 structure use Fig. 8 ~ Figure 13 to describe.Have, for fear of the repetition of explanation, for the structure identical with execution mode 1, the description thereof will be omitted to give same-sign again.
Fig. 8 represents the outward appearance of the electromagnetic transducer 10 of embodiments of the present invention 2, Fig. 8 (a) means the front view of the outward appearance of electromagnetic transducer 10, Fig. 8 (b) means the end view of the outward appearance of the electromagnetic transducer 10 of observing from long size side, Fig. 8 (c) means the end view of the outward appearance of the electromagnetic transducer 10 of observing from short size side, and Fig. 8 (d) means the rearview of the outward appearance of electromagnetic transducer 10.
As shown in Figure 8 (a), in upper side frame body 16, together with sound radiation hole 15a, at the central portion of upper side frame body 16, be formed with the sound radiation hole 15b larger than sound radiation hole 15a, sound radiation hole 15b is the size roughly the same with the convex form of oscillating plate 21.
As shown in Fig. 8 (b) and Fig. 8 (c), upper side frame body 16 is writing board shapes, and to cover the one side of lower side frame body 17 and to form the mode of empty inside and form, oscillating plate 21 exposes to outside from the sound radiation hole 15b of upper side frame body 16.
As shown in Fig. 8 (d), at lower side frame body 17, be formed with sound radiation hole 15a, do not form sound radiation hole 15b.
Fig. 9 means the cutaway view of structure of the electromagnetic transducer 10 of embodiments of the present invention 2, and Fig. 9 (a) is the cutaway view of the electromagnetic transducer 10 in situation about cutting off along the C-C line shown in Fig. 8 (a).
As shown in Fig. 9 (a), in upper side frame body 16, at central portion, be formed with sound radiation hole 15b, the interval that separates regulation with sound radiation hole 15b is formed with sound radiation hole 15a.
In addition, as shown in Fig. 9 (a), permanent magnet 33 is fixed in the central configuration with upper side frame body 16 internal face in opposite directions of lower side frame body 17, and at the face relative face fixing with side frame body under quilt 17 of permanent magnet 33, mounting has the plate 38 as yoke.Yoke 38 configures on a straight line in the horizontal direction of upper side frame body 16, and upper side frame body 16 between produce the magnetic field that magnetic flux density is high.
And then, as shown in Fig. 9 (a), vibrating membrane 21a form by between permanent magnet 33 and lower side frame body 17, between plate 38 and upper side frame body 16, with the convex form of plate 38 position in opposite directions, in addition, between plate 38 and upper side frame body 16, be formed with coil pattern 21b.
Fig. 9 (b) is the cutaway view of the electromagnetic transducer 10 in situation about having cut off along D-D line shown in Fig. 8 (a).As shown in Figure 9 (b), the upper surface of the convex form of oscillating plate 21 is given prominence to and exposes from the sound radiation hole 15b of upper side frame body 16.
Have again, about the operation principle of electromagnetic transducer 10, same with execution mode 1.
Then for the structure that improves the rigidity of oscillating plate 21, describe.
Figure 10 is the stereogram of observing obliquely the oscillating plate 21 of execution mode 2.
As shown in figure 10, oscillating plate 21 is by being formed the stereochemical structure of concaveconvex shape by the thickness vibrating membrane 21a that roughly film forms uniformly, and on vibrating membrane, be formed with the coil pattern 21b that accepts the magnetic flux concentrated by plate 38, compare with the oscillating plate of existing writing board shape thus, the rigidity of oscillating plate self improves.
In addition, as shown in figure 10, at the peripheral part of oscillating plate 21, pleated ground forms vibrating membrane 21a, forms superimposed overlapping portion 21c, can make thus the rigidity of oscillating plate 21 peripheral parts improve.
Have again, with execution mode 1 similarly, if the structure that the rigidity of oscillating plate 21 is improved is that other structure also can.
Other structure of the rigidity raising that makes oscillating plate 21 here, is shown.
Figure 11 means other the stereogram of outward appearance of oscillating plate 21 of the electromagnetic transducer 10 of execution mode 2, replaces the overlapping portion 21c of Figure 10, is formed with the coil pattern 21d that strengthens use on the convex form surface of oscillating plate 21.
Figure 12 means other the stereogram of outward appearance of oscillating plate 21 of the electromagnetic transducer 10 of execution mode 2, replaces the reinforcement coil pattern 21d of Figure 11, is formed with reinforcement 21e.Reinforcement 21e between the coil pattern 21b on oscillating plate 21 surfaces, be that the short dimensional directions of convex form upper surface is formed with groove shape.
Figure 13 means other the stereogram of outward appearance of oscillating plate 21 of the electromagnetic transducer 10 of execution mode 2, replaces the overlapping portion 21c of Figure 10, is provided with stiffener 21g.Stiffener 21g is arranged on the internal face of the convex form of oscillating plate 21, and the convex form of oscillating plate 21 is strengthened.
As mentioned above, according to the electromagnetic transducer 10 of execution mode 2, can obtain the effect identical with the electromagnetic transducer 10 of execution mode 1, and can obtain the effect of the compact in size that makes electromagnetic transducer 10.
Have again, in execution mode 1,2, recorded the coil pattern 21b that is formed with meander-shaped on the surface of oscillating plate 21, but can be also on the two sides of vibrating membrane 21a, to form the structure of coil pattern 21b.In addition can be also at oscillating plate 21, to imbed the structure of coil pattern 21b.
In addition, in execution mode 1,2, show permanent magnet 12,13 and be the example of the situation of 3 row and 1 row, but other columns also can, by similarly forming oscillating plate 21, can obtain same effect.
In addition, show at vibrating membrane 21a and the example strengthened with coil pattern 21d is set, at vibrating membrane 21a, forms the example of the reinforcement 21e of groove shape, the stiffener 21f forming at peripheral part or the inner setting material equal by the structure member with oscillating plate 21 or that proportion is little of oscillating plate 21, the example of 21g, but use separately respectively, a plurality of uses, or constitute also can, can obtain same effect.
In addition, in order to illustrate, at upper side frame body 16 and lower side frame body 17, give upper and lower difference, but the structure that has made to reverse up and down also can.
In addition, each figure representing in embodiments of the present invention to describe intelligibly and exaggerates expansion and represent in order to hold, and the relation of the thickness of each structure etc. is from actual different.
In industry, utilize possibility
As mentioned above, electromagnetic transducer of the present invention can make the rigidity of oscillating plate self improve, even in the situation that low range is regenerated, when vibrating, oscillating plate is difficult to occur the resonance of oscillating plate, can suppress the generation of extraordinary noise, and can suppress the resonance of oscillating plate, can improve performance, therefore be applicable to the loud speaker of audio system etc.
Claims (5)
1. an electromagnetic transducer, wherein, possesses:
A pair of framework forms empty inside when combination;
Permanent magnet, is configured in the inside of described framework, is equipped with the plate that makes flux concentration; And
Oscillating plate, by the vibrating membrane of even thickness, form the stereochemical structure of concaveconvex shape, and in the long size side of described vibrating membrane, dispose and accept by the coil pattern of the concentrated magnetic flux of described plate, in end face or the bottom surface of described vibrating membrane, dispose the coil pattern that this is linked between the coil pattern of long size side configuration.
2. electromagnetic transducer according to claim 1, is characterized in that, is formed with ，Gai overlapping portion, overlapping portion described vibrating membrane is formed to pleated superimposed in the long size two ends of described oscillating plate periphery.
3. electromagnetic transducer according to claim 1, is characterized in that, is formed with the reinforcement coil pattern separated with described coil pattern electricity on the surface of described oscillating plate.
4. electromagnetic transducer according to claim 1, is characterized in that, is formed with the reinforcement of groove shape in the part that does not form coil pattern on described oscillating plate surface.
5. electromagnetic transducer according to claim 1, is characterized in that, is provided with the stiffener that the stereochemical structure of described oscillating plate is strengthened.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2009/001871 WO2010122605A1 (en) | 2009-04-23 | 2009-04-23 | Electromagnetic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102067629A CN102067629A (en) | 2011-05-18 |
| CN102067629B true CN102067629B (en) | 2014-02-12 |
Family
ID=42978753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980122488.2A Expired - Fee Related CN102067629B (en) | 2009-04-23 | 2009-04-23 | Electromagnetic converter |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4553984B1 (en) |
| KR (1) | KR101057842B1 (en) |
| CN (1) | CN102067629B (en) |
| WO (1) | WO2010122605A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5328691B2 (en) | 2010-02-22 | 2013-10-30 | 三菱電機エンジニアリング株式会社 | Electromagnetic transducer |
| JP6499408B2 (en) * | 2014-07-02 | 2019-04-10 | クラリオン株式会社 | Speaker device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1640187A (en) * | 2002-02-28 | 2005-07-13 | 古河电气工业株式会社 | Planar speaker |
| CN1943272A (en) * | 2005-01-28 | 2007-04-04 | 松下电器产业株式会社 | Electrokinetic electro-acoustic converter and electronic device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT325694B (en) * | 1973-09-14 | 1975-11-10 | Akg Akustische Kino Geraete | ELECTRODYNAMIC CONVERTER, IN PARTICULAR SOUND CONVERTER |
| JPS5094917A (en) * | 1973-12-22 | 1975-07-29 | ||
| JPS5094917U (en) | 1973-12-26 | 1975-08-08 | ||
| JPH0360045U (en) * | 1989-10-18 | 1991-06-13 | ||
| IT236251Y1 (en) * | 1997-12-24 | 2000-08-08 | So Ge A M S P A | BOTTLE WITH CHOKE REGION WITH FACILITATED GRIP |
| JPH11192627A (en) * | 1997-12-30 | 1999-07-21 | Beishin Kogyo Kk | Synthetic resin molded product prevented from having sink by foaming, and molding thereof |
| JP4361580B2 (en) * | 2002-06-24 | 2009-11-11 | パナソニック株式会社 | Speaker diaphragm and speaker |
| KR100547357B1 (en) * | 2004-03-30 | 2006-01-26 | 삼성전기주식회사 | Speaker for mobile terminal and manufacturing method thereof |
| JP3841222B1 (en) * | 2005-01-28 | 2006-11-01 | 松下電器産業株式会社 | Electrodynamic electroacoustic transducer and electronic equipment |
-
2009
- 2009-04-23 KR KR1020107028523A patent/KR101057842B1/en active IP Right Grant
- 2009-04-23 JP JP2010517103A patent/JP4553984B1/en not_active Expired - Fee Related
- 2009-04-23 WO PCT/JP2009/001871 patent/WO2010122605A1/en active Application Filing
- 2009-04-23 CN CN200980122488.2A patent/CN102067629B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1640187A (en) * | 2002-02-28 | 2005-07-13 | 古河电气工业株式会社 | Planar speaker |
| CN1943272A (en) * | 2005-01-28 | 2007-04-04 | 松下电器产业株式会社 | Electrokinetic electro-acoustic converter and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110008340A (en) | 2011-01-26 |
| JPWO2010122605A1 (en) | 2012-10-22 |
| JP4553984B1 (en) | 2010-09-29 |
| KR101057842B1 (en) | 2011-08-19 |
| WO2010122605A1 (en) | 2010-10-28 |
| CN102067629A (en) | 2011-05-18 |
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