CN101803403A - Ultra slim type acoustic transducer - Google Patents
Ultra slim type acoustic transducer Download PDFInfo
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- CN101803403A CN101803403A CN200780100666A CN200780100666A CN101803403A CN 101803403 A CN101803403 A CN 101803403A CN 200780100666 A CN200780100666 A CN 200780100666A CN 200780100666 A CN200780100666 A CN 200780100666A CN 101803403 A CN101803403 A CN 101803403A
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- 238000010168 coupling process Methods 0.000 claims description 16
- 230000008878 coupling Effects 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 230000005415 magnetization Effects 0.000 claims description 5
- 230000001012 protector Effects 0.000 abstract 2
- 230000026683 transduction Effects 0.000 abstract 1
- 238000010361 transduction Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 29
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- 239000002184 metal Substances 0.000 description 3
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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
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
- B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
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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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The present invention discloses a ultra slim type acoustic transducer which is reduced in thickness, wherein a magnetic closed circuit is constituted for acoustic transduction. The ultra slim type acoustic transducer includes a first magnet which is a vertical magnet (110), and a second magnet which is a horizontal magnet (120), and further includes a central yoke (130) coupled to a lower portion of the first magnet, and an outer yoke (140) coupled to a side surface of the second magnet (120) and also coupled to the central yoke (130), for defining an air gap with the first magnet. A part of a coil portion (150) is inserted into the air gap. The ultra slim type acoustic transducer includes a diaphragm (160) with the coil portion (150) mounted thereon, a protector (200) for protecting the diaphragm (160), and a frame (100) for supporting at least the outer yoke (140) and the protector (200).
Description
Technical field
The present invention relates to a kind of ultra slim type acoustic transducer, more specifically, relate to the ultra slim type acoustic transducer that a kind of thickness reduces, wherein made up closed magnetic circuit and be used for the acoustic energy conversion.
Background technology
Generally speaking, (Buddhist comes bright Left Hand Rule to point out: when the conductor that flows through as electric current places magnetic field according to Fo Laiming (Fleming) Left Hand Rule, power is applied on this conductor), loud speaker converts electric energy to mechanical energy by the coiler part that is present in the air gap.That is, when the current signal that comprises various frequencies was applied on the voice coil loudspeaker voice coil, this voice coil loudspeaker voice coil generated mechanical energy according to current strength and frequency level.Thereby the vibrating diaphragm that is attached to coiler part is vibrated, thereby produces the acoustic pressure of the intensity that can hear.
By in the yoke of making by ferrous metal, using magnet (permanent magnet) and top board (or upper plate), the magnetic circuit of loud speaker be designed such that magnetic flux can be present in the interconnection that meets at right angles of coiler part in the air gap.Coiler part is attached to vibrating diaphragm, is used for producing exciting force by input signal on above-below direction.Therefore, the vibrating diaphragm that is attached to framework and limited by this framework is vibrated to produce acoustic pressure.Vibrating diaphragm has various waveforms, with the response characteristic that obtains high-quality and eliminate flexing phenomenon about up-down vibration.The shape of vibrating diaphragm becomes the very big design variable that influences frequency characteristic.
Fig. 1 is the sectional view that traditional ultra slim type acoustic transducer is shown, and Fig. 2 is the structure chart that the closed magnetic circuit of traditional ultra slim type acoustic transducer is shown.
Referring to Fig. 1, traditional ultra slim type acoustic transducer comprises: framework 1; Yoke 2 inserts and is installed in the framework 1; Interior annular magnet 3 and outer ring magnet 4, be used for magnetic force is sent to yoke 2 or receives magnetic force from yoke 2, the direction of magnetization of interior annular magnet 3 and outer ring magnet 4 is a vertical direction, makes magnetic force vertically to be sent to coiler part 7 from interior annular magnet 3 and outer ring magnet 4; Coiler part 7 in the air gap between annular magnet 3, interior annular roof plate 5 and outer ring magnet 4, the outer ring top board 6 in partly being inserted into, is used to prevent magnetic flux bleed-through and magnetic flux vertically is sent to coiler part 7; Vibrating diaphragm 8, coiler part 7 is attached to this vibrating diaphragm; Protective device 9 is used to protect vibrating diaphragm 8; And phonate hole 10, be formed in the protective device 9.
As depicted in figs. 1 and 2, interior annular magnet 3 and outer ring magnet 4 vertically are magnetized on yoke 2, and magnetic force being sent with meeting at right angles to coiler part 7, and interior annular roof plate 5 and outer ring top board 6 are stacked on magnet 3 and 4 successively.Interior annular magnet 3 and outer ring magnet 4 have opposite polarity N or S.
Vibrating diaphragm 8 is coupled with the coupling projection at the place, upper edge of the horizontal surface that upwards is formed on framework 1.The signal of telecommunication corresponding with the sound for the treatment of playback or sound is applied to the two ends of the coiler part of rolling in the form of a ring 7.Coiler part 7 is attached to the basal surface of vibrating diaphragm 8, the space between interior annular magnet 3 and outer ring magnet 4.The protective device 9 that is made of metal is in the top and framework 1 coupling of vibrating diaphragm 8, with up-down vibration space and the protection vibrating diaphragm 8 of guaranteeing vibrating diaphragm 8.
In above-mentioned traditional ultra slim type acoustic transducer, when being applied to the two ends of coiler part 7 with the sound for the treatment of playback or the corresponding ac signal of sound, yoke 2, magnet 3 and 4 and top board 5 and 6 constitute closed magnetic circuits.Magnetic flux and coiler part 7 interconnection, and the vibrating diaphragm 8 that is attached with coiler part 7 is with coiler part 7 vibrations, to produce the acoustic pressure of the intensity that can hear thereupon.
Yet, because traditional ultra slim type acoustic transducer has a large amount of assemblies, making that the stacked structure of this sonic transducer and magnetic circuit are thick, this has increased the unit cost of producing.If interior annular magnet 3, outer ring magnet 4 and the interior annular roof plate 5 and the outer ring top board 6 that are stacked on magnet 3 and 4 are removed, to reduce the thickness of traditional ultra slim type acoustic transducer, then owing to the magnetic flux with coiler part 7 interconnection reduces to make acoustic pressure to descend, this has reduced the Performance And Reliability of traditional ultra slim type acoustic transducer.
Summary of the invention
Technical problem
Therefore, the invention is intended to solve foregoing problems of the prior art.An object of the present invention is to provide a kind of ultra slim type acoustic transducer, this sonic transducer can be by reducing the minimized in size that assembly makes vertical direction.
Another object of the present invention provides a kind of ultra slim type acoustic transducer, and this sonic transducer can prevent that the magnetic flux interconnection from reducing by the volume that increases magnet.
Technical scheme
In order to achieve the above object, provide a kind of ultra slim type acoustic transducer, comprising: first magnet is vertical magnet; Second magnet is horizontal magnet, and this second magnet forms apart from first magnet predetermined air gap; The center yoke is with the lower part coupling of first magnet; And outer yoke, with the coupling of the side surface of second magnet, and be coupled with the center yoke.This ultra slim type acoustic transducer also comprises: coiler part is inserted in the described air gap at least in part; Vibrating diaphragm is equipped with coiler part on the vibrating diaphragm; Protective device is used to protect vibrating diaphragm; And framework, be used for supporting at least outer yoke and protective device.
Between first magnet and second magnet, in described air gap, be formed with first magnetic circuit, and between second magnet and first magnet the center yoke and outside be formed with second magnetic circuit in the yoke, constitute closed magnetic circuit by first magnet and second magnet, center yoke and outer yoke.
In another aspect of this invention, provide a kind of ultra slim type acoustic transducer, comprising: yoke, have core and periphery, this periphery limits around the space of core symmetry; First magnet is vertical magnet, with the top coupling of core; Second magnet is horizontal magnet, limits air gap with first magnet in described space, and with the coupling of the inner surface of periphery; Coiler part partly is inserted in the described air gap; Vibrating diaphragm is equipped with this coiler part on vibrating diaphragm; Protective device is used to protect vibrating diaphragm; And framework, be used for supporting at least yoke and protective device.
In described air gap, be formed with first magnetic circuit between second magnet in described space and first magnet, and between first magnet and second magnet, in described core and periphery, be formed with second magnetic circuit, constitute closed magnetic circuit by first magnet and second magnet and yoke.
In still another aspect of the invention, a kind of ultra slim type acoustic transducer is provided, comprises: first magnetic circuit is formed between first magnet and second magnet, this second magnet has the direction of magnetization vertical with the direction of magnetization of first magnet, and limits air gap with first magnet; Coiler part is inserted in this air gap at least in part; Vibrating diaphragm is equipped with this coiler part on the vibrating diaphragm; And second magnetic circuit, form part by the path between second magnet and first magnet and form.Constitute closed magnetic circuit by first magnet, first magnetic circuit, second magnet and second magnetic circuit.
Beneficial effect
According to the present invention, the length of the volume maximization by making first magnet and second magnet, the minor axis part by shortening first magnet and second magnet and increase first magnet and the length of the major axis of second magnet part, this ultra slim type acoustic transducer can amplify the sound of playback or the output level of sound.
In addition, according to the present invention, the assembly of the enough minimum numbers of this ultra slim type acoustic transducer energy obtains high tonequality.
Description of drawings
Fig. 1 is the sectional view that traditional ultra slim type acoustic transducer is shown;
Fig. 2 is the structure chart that the closed magnetic circuit of traditional ultra slim type acoustic transducer is shown;
Fig. 3 is the exploded perspective view that illustrates according to the ultra slim type acoustic transducer of first embodiment of the invention;
Fig. 4 is the mounted inside figure that illustrates according to the part of the ultra slim type acoustic transducer of first embodiment of the invention;
Fig. 5 is the sectional view that illustrates according to the short-axis direction of the ultra slim type acoustic transducer of first embodiment of the invention;
Fig. 6 is the sectional view that illustrates according to the long axis direction of the ultra slim type acoustic transducer of first embodiment of the invention;
Fig. 7 is the structure chart that illustrates according to the part of the closed magnetic circuit of the ultra slim type acoustic transducer of first embodiment of the invention;
Fig. 8 is the front perspective view that illustrates according to the ultra slim type acoustic transducer of first embodiment of the invention;
Fig. 9 is the rear perspective view that illustrates according to the ultra slim type acoustic transducer of first embodiment of the invention;
Figure 10 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of second embodiment of the invention;
Figure 11 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of third embodiment of the invention;
Figure 12 is the sectional view that illustrates according to the part of the ultra slim type acoustic transducer of third embodiment of the invention; And
Figure 13 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of fourth embodiment of the invention.
Embodiment
Hereinafter, describe the preferred embodiments of the present invention with reference to the accompanying drawings in detail.
Fig. 3 is the exploded perspective view that illustrates according to the ultra slim type acoustic transducer of first embodiment of the invention, and Fig. 4 is the mounted inside figure that illustrates according to the part of the ultra slim type acoustic transducer of first embodiment of the invention.
As shown in Figure 3 and Figure 4, the ultra slim type acoustic transducer according to first embodiment of the invention comprises framework 100, first magnet 110, second magnet 120, center yoke 130, outer yoke 140, coiler part 150, vibrating diaphragm 160, terminal 170 and protective device 200.In Fig. 4, the major axis of A-A ' expression ultra slim type acoustic transducer, and the minor axis of B-B ' expression ultra slim type acoustic transducer.
Be used for magnetic force is transmitted the top that is fixedly attached to center yoke 130 by first magnet 110 of phonate hole 201.The center yoke 130 and the bottom coupling that is inserted into the outer yoke 140 in the framework 100 of first magnet 110 are installed regularly.Be provided with two second magnet 120 in the both sides of first magnet 110.Each second magnet 120 all is fixedly secured on the inner surface of outer yoke 140, and defines predetermined air gap 101 with first magnet 110.
The part of coiler part 150 is inserted in the air gap 101 between first magnet 110 and second magnet 120.Fixing by protective device 200 and framework 100 with the vibrating diaphragm 160 of coiler part 150 couplings, terminal 170 inserts and is installed in the framework 100.
When input electrical signal, first magnet 110 and second magnet 120 produce magnetic field.Because magnet 110 and 120 magnetic fields that produced, coiler part 150 reciprocating motions make to attract and repel repeatedly to occur.Vibrating diaphragm 160 vibrates along with the vibration of coiler part 150, to produce acoustic pressure thereupon.Terminal 170 provides and being electrically connected of assembly, and protective device 200 protection vibrating diaphragms 160 are not subjected to external action, and framework 100 supports outer yoke 140 or terminal 170 and protective devices 200, with the up-down vibration space of maintenance vibrating diaphragm 160.
Fig. 5 is the sectional view that illustrates according to the short-axis direction of the ultra slim type acoustic transducer of first embodiment of the invention, Fig. 6 is the sectional view that illustrates according to the long axis direction of the ultra slim type acoustic transducer of first embodiment of the invention, and Fig. 7 is the structure chart that illustrates according to the part of the closed magnetic circuit of the ultra slim type acoustic transducer of first embodiment of the invention.Particularly, Fig. 5 is the sectional view along line A-A ' (major axis) intercepting shown in Figure 4, and Fig. 6 is the sectional view along line B-B ' (minor axis) intercepting shown in Figure 4.
With reference to Fig. 5, Fig. 6 and Fig. 7, close attachment is geomagnetic into N polarity or S polarity to second magnet, 120 along continuous straight runs of the inner surface of outer yoke 140, and described outer yoke 140 is inserted in the framework 100.First magnet 110 that is coupled to the top of center yoke 130 vertically is magnetized, and has the polarity with the polarity vertical symmetry of second magnet 120, that is, and and S polarity or N polarity.
By shortening first magnet 110 and second magnet 120 in the length on the short-axis direction and increase by first magnet 110 and the length of second magnet 120 on long axis direction, promote the magnetic flux interconnection.In addition, first magnet 110 is set to concordant each other with second magnet 120.Thus, ultra slim type acoustic transducer according to the present invention is by simplified assembly but do not reduce magnetic flux interconnection, makes minimized in size on the vertical direction.
More specifically, when second magnet 120 has N polarity and first magnet 110 has the S polarity chron, as finding on the minor axis surface, for the left half of second magnet 120 of horizontal magnet has S polarity, right half has N polarity, for the lower part with first magnet 110 of the vertical magnet of second magnet, 120 vertical symmetry has N polarity, and top has S polarity.Therefore, magnetic flux moves to the right from the left side in second magnet 120, and moves to the bottom from the top in first magnet 110.
In first magnetic circuit, magnetic flux flows to the S utmost point of the upper surface that is formed on first magnet 110 via air gap 101 from the N utmost point of the right half that is formed on second magnet 120.In second magnetic circuit, magnetic flux flows to the N utmost point of the lower part that is formed on first magnet 110 from the S utmost point on the top that is formed on first magnet 110, pass the center yoke 130 and the outer yoke 140 that are coupled to first magnet 110 regularly, and flow into the S utmost point of the left half that is formed on second magnet 120.First magnetic circuit and second magnetic circuit constitute closed magnetic circuit.In this closed magnetic circuit, magnetic force in addition with sweep more weak, coiler part 150 152 interconnection, make that magnetic flux density is uniform.
Fig. 8 is the front perspective view that illustrates according to the ultra slim type acoustic transducer of first embodiment of the invention, and Fig. 9 is the rear perspective view that illustrates according to the ultra slim type acoustic transducer of first embodiment of the invention.
As shown in Fig. 8 and Fig. 9, second magnet (120; Referring to Fig. 4) in couples with the outer yoke (140 that is inserted in the framework 100; Referring to Fig. 4) inner surface coupling.The center yoke 130 that is coupled to first magnet 110 regularly is coupled to outer yoke (140 regularly; Referring to Fig. 4) basal surface, wherein, first magnet 110 is by the air gap 101 and second magnet (120; Referring to Fig. 4) separate.Be positioned at and be attached to outer yoke (140 fully; Referring to Fig. 4) the center yoke 130 and second magnet (120 of basal surface; Referring to Fig. 4) between the air gap 101 of preliminary dimension as coiler part (150; Referring to Fig. 5) the insertion space and the back phonate hole.The protective device 200 that is made of metal is guaranteed the oscillation space of vibrating diaphragm 160, and protection comprises other assembly of framework 100.
In the following description, use identical label with the element components identical of first embodiment of the invention.
Figure 10 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of second embodiment of the invention.First magnet 110 that in the vertical direction is magnetized is attached to center yoke 130, and a pair of second magnet 120 that is magnetized in the horizontal direction is attached to and is inserted into framework (100; Referring to Fig. 4) in the inner surface of outer yoke 140.The bottom that the center yoke 130 of first magnet 110 adheres to and be coupled to outer yoke 140 is installed.Except the top board 190 that further is provided with on the top of first magnet 110, identical among above and other assembly of second embodiment and first embodiment.
In a second embodiment, will have N polarity and first magnet 110 has the closed magnetic circuit of S polarity describes to second magnet 120.As finding on the minor axis surface, the left half of second magnet 120 has S polarity, and the right half of second magnet 120 has N polarity, and the top of first magnet 110 has S polarity, and its underpart has N polarity.
Therefore, in first magnetic circuit, when with coiler part 150 interconnection, magnetic flux flows to the S utmost point of first magnet 110 via air gap 101 and is formed on top board 190 on first magnet 110 from the N utmost point of the right half that is formed on second magnet 120.In second magnetic circuit, magnetic flux is from top board 190, flow to the N utmost point of the lower part that is formed on first magnet 110 from the S utmost point on the top that is formed on first magnet 110, pass center yoke 130 and outer yoke 140, and inflow is formed on the S utmost point of the left half of second magnet 120.First magnetic circuit and second magnetic circuit constitute closed magnetic circuit.In this closed magnetic circuit, magnetic force in addition with sweep more weak, coiler part 150 152 interconnection, make that magnetic flux density is uniform.
Figure 11 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of third embodiment of the invention, and Figure 12 is the sectional view that illustrates according to the part of the ultra slim type acoustic transducer of third embodiment of the invention.
Figure 12 is the sectional view of looking from C direction shown in Figure 11.Except the height of first magnet 110, identical among the assembly of the ultra slim type acoustic transducer of the 3rd embodiment and coupling process and first embodiment.Particularly, the upper surface of first magnet 110 is changed to the upper surface that is lower than second magnet 120.
In the 3rd embodiment, second magnet 120 had N polarity and first magnet 110 has the closed magnetic circuit of S polarity describes.The left half of second magnet 120 has S polarity, and its right half has N polarity, and the top of first magnet 110 has S polarity, and its underpart has N polarity.
Therefore, in first magnetic circuit, when with coiler part 150 interconnection, magnetic flux flows to the S utmost point on the top that is formed on first magnet 110 via air gap 101 from the N utmost point of the right half that is formed on second magnet 120.Because it is relatively low that the top of first magnet 110 is changed to, so in first magnetic circuit, promoted magnetic flux to flow.In second magnetic circuit, magnetic flux flows to the N utmost point of the lower part that is formed on first magnet 110 from the S utmost point on the top that is formed on first magnet 110, pass center yoke 130 and outer yoke 140, and inflow is formed on the S utmost point of the left half of second magnet 120.First magnetic circuit and second magnetic circuit constitute closed magnetic circuit.In this closed magnetic circuit, magnetic force in addition with sweep more weak, coiler part 150 152 interconnection, make that magnetic flux density is uniform.
Figure 13 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of fourth embodiment of the invention.Ultra slim type acoustic transducer according to fourth embodiment of the invention comprises framework 100, first magnet 110, second magnet 120, yoke 130, coiler part 150, vibrating diaphragm 160, terminal 170 and protective device 200.
In the 4th embodiment, second magnet 120 had N polarity and first magnet 110 has the closed magnetic circuit of S polarity describes.As finding on the minor axis surface, the left half of second magnet 120 has S polarity, and its right half has N polarity, and the top of first magnet 110 has S polarity, and its underpart has N polarity.
In first magnetic circuit, the N utmost point of the right half of second magnet 120 of magnetic flux from be formed on space 134 flows to the S utmost point on the top that is formed on first magnet 110 via air gap 101.In second magnetic circuit, magnetic flux flows to the N utmost point of the lower part that is formed on first magnet 110 from the S utmost point on the top that is formed on first magnet 110, pass the core 132 and the periphery 133 of yoke 130, and flow into the S utmost point of the left half that is formed on second magnet 120.This process is carried out repeatedly.In this closed magnetic circuit, magnetic force in addition with sweep more weak, coiler part 150 152 interconnection, make that magnetic flux density is uniform.
In the fifth embodiment of the present invention, closed magnetic circuit forms part by first magnet, second magnet and path and constitutes.Except the path forms part, identical among the assembly of the 5th embodiment and coupling process and first embodiment.The 5th embodiment is described in detail under the situation of figure not having.
In the 5th embodiment, first flux path is formed on second magnet (120; Referring to Fig. 7) and first magnet (110; Referring to Fig. 7) between air gap (101; Referring to Fig. 7) in, and the second magnetic flux routed path forms the formation of part (not shown), this path forms part with first magnet (110; Referring to Fig. 7) be connected to second magnet (120; Referring to Fig. 7).First magnetic circuit and second magnetic circuit constitute closed magnetic circuit.In this closed magnetic circuit, magnetic force in addition with more weak, coiler part (150; Referring to Fig. 7) sweep (152; Referring to Fig. 7) interconnection, make that magnetic flux density is uniform.
Industrial applicibility
According to the present invention, in ultra slim type acoustic transducer, for first magnet 110 of vertical magnet, be second magnet 120, center yoke 130 and the outer yoke 140 formation closed magnetic circuits of horizontal magnet.Because the amount of the horizontal surface of first magnet 110 and second magnet 120 is maximized,, but reduced the total quantity of assembly so the output level of the sound of playback or sound obtains amplification.Therefore, the assembly of the enough minimum numbers of this ultra slim type acoustic transducer energy obtains high tonequality.In the prior art, magnetic flux is sent to coiler part 150 with the right angle.According to the present invention, outer yoke 140 and center yoke 130 are set, so that magnetic flux density is even.
Although described the preferred embodiments of the present invention, it should be understood that, the invention is not restricted to these preferred embodiments, but can in the spirit and scope of the present invention as described in the appended claims, make various changes and modification by those skilled in the art.
Claims (20)
1. ultra slim type acoustic transducer comprises:
First magnet, this first magnet is vertical magnet;
Second magnet, this second magnet is horizontal magnet, and forms apart from first magnet predetermined air gap is arranged;
The center yoke, the bottom coupling of this center yoke and first magnet;
Outer yoke, the side surface of this outer yoke and second magnet is coupled, and is coupled with the center yoke;
Coiler part, this coiler part are inserted in the described air gap at least in part;
Vibrating diaphragm is equipped with described coiler part on this vibrating diaphragm;
Protective device is used to protect described vibrating diaphragm; And
Framework is used for supporting at least described outer yoke and described protective device.
2. ultra slim type acoustic transducer as claimed in claim 1, wherein, between first magnet and second magnet, in described air gap, be formed with first magnetic circuit, and between second magnet and first magnet described center yoke and outside be formed with second magnetic circuit in the yoke, constitute closed magnetic circuit by first magnet and second magnet, center yoke and outer yoke.
3. ultra slim type acoustic transducer as claimed in claim 2, wherein, described first magnetic circuit is formed between second magnet and first magnet.
4. ultra slim type acoustic transducer as claimed in claim 1, wherein, described second magnet is formed on two side surfaces of first magnet in couples.
5. as the described ultra slim type acoustic transducer of arbitrary claim in the claim 1 to 4, wherein, be provided with top board on the top of described first magnet.
6. ultra slim type acoustic transducer as claimed in claim 5, wherein, described first magnetic circuit is formed between second magnet and the top board.
7. as the described ultra slim type acoustic transducer of arbitrary claim in the claim 1 to 4, wherein, the upper surface of first magnet is changed to the upper surface that is lower than second magnet.
8. ultra slim type acoustic transducer comprises:
Yoke, this yoke has core and periphery, and this periphery limits around the space of this core symmetry;
First magnet, this first magnet are the vertical magnet with the coupling of the top of this core;
Second magnet, this second magnet is horizontal magnet, this horizontal magnet limits air gap with first magnet in described space, and with the coupling of the inner surface of described periphery;
Coiler part, this coiler part partly are inserted in the described air gap;
Vibrating diaphragm is equipped with described coiler part on this vibrating diaphragm;
Protective device is used to protect described vibrating diaphragm; And
Framework is used for supporting at least described yoke and described protective device.
9. ultra slim type acoustic transducer as claimed in claim 8, wherein, in described air gap, be formed with first magnetic circuit between second magnet in described space and first magnet, and between first magnet and second magnet, in described core and periphery, be formed with second magnetic circuit, constitute closed magnetic circuit by first magnet and second magnet and yoke.
10. ultra slim type acoustic transducer as claimed in claim 9, wherein, described first magnetic circuit is formed between second magnet and first magnet in the space.
11. ultra slim type acoustic transducer as claimed in claim 8, wherein, described second magnet is formed on two side surfaces of first magnet in couples.
12., wherein, be provided with top board on the top of described first magnet as the described ultra slim type acoustic transducer of arbitrary claim in the claim 8 to 11.
13. ultra slim type acoustic transducer as claimed in claim 12, wherein, described first magnetic circuit is formed between second magnet and described top board in the described space.
14. a ultra slim type acoustic transducer comprises:
First magnetic circuit, this first magnetic circuit are formed between first magnet and second magnet, and this second magnet has the direction of magnetization vertical with the direction of magnetization of this first magnet, and limit air gap with this first magnet;
Coiler part, this coiler part are inserted in the described air gap at least in part;
Vibrating diaphragm is equipped with described coiler part on this vibrating diaphragm; And
Second magnetic circuit, this second magnetic circuit forms part by the path between second magnet and first magnet and forms, and constitutes closed magnetic circuit by first magnet, first magnetic circuit, second magnet and second magnetic circuit.
15. ultra slim type acoustic transducer as claimed in claim 14, wherein, described first magnet is vertical magnet, and described second magnet is horizontal magnet.
16. ultra slim type acoustic transducer as claimed in claim 14, wherein, described path forms part and is connected between first magnet and second magnet.
17. as the described ultra slim type acoustic transducer of arbitrary claim in the claim 14 to 16, wherein, described first magnetic circuit is formed between second magnet and first magnet.
18., wherein, be provided with top board on the top of described first magnet as the described ultra slim type acoustic transducer of arbitrary claim in the claim 14 to 16.
19. ultra slim type acoustic transducer as claimed in claim 18, wherein, described first magnetic circuit is formed between second magnet and the top board.
20. ultra slim type acoustic transducer as claimed in claim 14, wherein, described second magnet is formed on the both sides of first magnet in couples.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2007-0095546 | 2007-09-19 | ||
| KR20070095546 | 2007-09-19 | ||
| KR1020070106870A KR100965740B1 (en) | 2007-09-19 | 2007-10-23 | Ultra slim type acoustic transducer |
| KR10-2007-0106870 | 2007-10-23 | ||
| PCT/KR2007/005297 WO2009038246A1 (en) | 2007-09-19 | 2007-10-26 | Ultra slim type acoustic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101803403A true CN101803403A (en) | 2010-08-11 |
| CN101803403B CN101803403B (en) | 2013-06-05 |
Family
ID=40696630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007801006662A Expired - Fee Related CN101803403B (en) | 2007-09-19 | 2007-10-26 | Ultra slim type acoustic transducer |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100965740B1 (en) |
| CN (1) | CN101803403B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263090A (en) * | 2015-10-26 | 2016-01-20 | 胡强 | Double-coil bone conduction sensor |
| CN108760895A (en) * | 2018-04-13 | 2018-11-06 | 沈阳工业大学 | Electromagnetic acoustic elasticity modulus measurement transducer structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101369330B1 (en) | 2013-02-15 | 2014-03-06 | 주식회사 이엠텍 | Slim protector and slim microspeaker module having the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0650308A1 (en) * | 1993-10-25 | 1995-04-26 | Star Micronics Co., Ltd. | Electroacoustic transducer and method of fabricating the same |
| CN1356016A (en) * | 1999-06-11 | 2002-06-26 | 株式会社Fps | Flat acoustic transducer |
| WO2007020925A1 (en) * | 2005-08-17 | 2007-02-22 | Fuji Electric Device Technology Co., Ltd. | Electro-acoustic transducer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4419352B2 (en) | 2001-07-26 | 2010-02-24 | パナソニック株式会社 | Speaker |
| JP3896970B2 (en) * | 2003-01-31 | 2007-03-22 | 松下電器産業株式会社 | Speaker |
| JP4078322B2 (en) | 2004-03-11 | 2008-04-23 | ホシデン株式会社 | speaker |
| JP4600024B2 (en) * | 2004-12-15 | 2010-12-15 | パナソニック株式会社 | Speaker and method for manufacturing the speaker |
-
2007
- 2007-10-23 KR KR1020070106870A patent/KR100965740B1/en not_active IP Right Cessation
- 2007-10-26 CN CN2007801006662A patent/CN101803403B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0650308A1 (en) * | 1993-10-25 | 1995-04-26 | Star Micronics Co., Ltd. | Electroacoustic transducer and method of fabricating the same |
| CN1356016A (en) * | 1999-06-11 | 2002-06-26 | 株式会社Fps | Flat acoustic transducer |
| WO2007020925A1 (en) * | 2005-08-17 | 2007-02-22 | Fuji Electric Device Technology Co., Ltd. | Electro-acoustic transducer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263090A (en) * | 2015-10-26 | 2016-01-20 | 胡强 | Double-coil bone conduction sensor |
| CN108760895A (en) * | 2018-04-13 | 2018-11-06 | 沈阳工业大学 | Electromagnetic acoustic elasticity modulus measurement transducer structure |
| CN108760895B (en) * | 2018-04-13 | 2020-11-06 | 沈阳工业大学 | Electromagnetic ultrasonic elastic modulus measuring transducer structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101803403B (en) | 2013-06-05 |
| KR100965740B1 (en) | 2010-06-24 |
| KR20090030188A (en) | 2009-03-24 |
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