CN101803403B - Ultra slim type acoustic transducer - Google Patents
Ultra slim type acoustic transducer Download PDFInfo
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- CN101803403B CN101803403B CN2007801006662A CN200780100666A CN101803403B CN 101803403 B CN101803403 B CN 101803403B CN 2007801006662 A CN2007801006662 A CN 2007801006662A CN 200780100666 A CN200780100666 A CN 200780100666A CN 101803403 B CN101803403 B CN 101803403B
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- 238000010168 coupling process Methods 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 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
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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 built 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 having conductor that electric current flows through to be placed in 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 air gap.That is, when the current signal that comprises various frequencies was applied on 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 using magnet (permanent magnet) and top board (or upper plate) in the yoke of being made by ferrous metal, 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 air gap.Coiler part is attached to vibrating diaphragm, is used for producing on above-below direction by input signal exciting force.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 affects 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 arranged in 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 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 partly is inserted in the air gap between interior annular magnet 3, interior annular roof plate 5 and outer ring magnet 4, outer ring top board 6, is used for preventing magnetic flux bleed-through and magnetic flux vertically being sent to coiler part 7; Vibrating diaphragm 8, coiler part 7 is attached to this vibrating diaphragm; Protective device 9 is for the protection of vibrating diaphragm 8; And phonate hole 10, be formed in 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 upper coupling projection along the place 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 7 of rolling in the form of a ring.Coiler part 7 is attached to the basal surface of vibrating diaphragm 8, until the space between interior annular magnet 3 and outer ring magnet 4.The protective device 9 that is made of metal is in 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 with when the sound of playback or ac signal corresponding to sound are applied to the two ends of coiler part 7, yoke 2, magnet 3 and 4 and top board 5 and 6 consist of closed magnetic circuits.Magnetic flux and coiler part 7 interconnection, and the vibrating diaphragm 8 that is attached with coiler part 7 vibrate together with coiler part 7, the acoustic pressure of the intensity that can hear with generation thereupon.
Yet, because traditional ultra slim type acoustic transducer has a large amount of assemblies, make the stacked structure of this sonic transducer and magnetic circuit 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, descend because the magnetic flux with coiler part 7 interconnection reduces to make acoustic pressure, 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 make by reducing assembly the minimized in size of vertical direction.
Another object of the present invention is to provide a kind of ultra slim type acoustic transducer, and this sonic transducer can prevent that by the volume that increases magnet the magnetic flux interconnection from reducing.
Technical scheme
In order to achieve the above object, provide a kind of ultra slim type acoustic transducer, comprising: the first magnet is vertical magnet; The second magnet is horizontal magnet, and this second magnet forms apart from the first magnet predetermined air gap; The center yoke is with the lower partial coupling of the first magnet; And outer yoke, with the side surface coupling of the second magnet, and be coupled with the center yoke.This ultra slim type acoustic transducer also comprises: coiler part is inserted in described air gap at least in part; Vibrating diaphragm is equipped with coiler part on vibrating diaphragm; Protective device is for the protection of vibrating diaphragm; And framework, be used for supporting at least outer yoke and protective device.
Be formed with the first magnetic circuit in described air gap between the first magnet and the second magnet, and be formed with the second magnetic circuit between the second magnet and the first magnet in center yoke and outer yoke, consist of closed magnetic circuit by the first magnet and the 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; The first magnet is vertical magnet, with the upper partial coupling of core; The second magnet is horizontal magnet, is limiting air gap in described space together with the first magnet, and with the coupling of the inner surface of periphery; Coiler part partly is inserted in described air gap; Vibrating diaphragm is equipped with this coiler part on vibrating diaphragm; Protective device is for the protection of vibrating diaphragm; And framework, be used for supporting at least yoke and protective device.
Be formed with the first magnetic circuit between the second magnet in described space and the first magnet in described air gap, and be formed with the second magnetic circuit in described core and periphery between the first magnet and the second magnet, consist of closed magnetic circuit by the first magnet and the second magnet and yoke.
In still another aspect of the invention, a kind of ultra slim type acoustic transducer is provided, comprises: the first magnetic circuit is formed between the first magnet and the second magnet, this second magnet has the direction of magnetization vertical with the direction of magnetization of the first magnet, and limits air gap together with the first magnet; Coiler part is inserted in this air gap at least in part; Vibrating diaphragm is equipped with this coiler part on vibrating diaphragm; And second magnetic circuit, formed by the path forming section between the second magnet and the first magnet.Consist of closed magnetic circuit by the first magnet, the first magnetic circuit, the second magnet and the second magnetic circuit.
Beneficial effect
According to the present invention, by the volume that makes the first magnet and the second magnet maximize, the length of minor axis part by shortening the first magnet and the second magnet and increase the first magnet and the length of the major axis of the 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 with reference to the accompanying drawings the preferred embodiments of the present invention 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, the first magnet 110, the 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 the first magnet 110 of phonate hole 201.The center yoke 130 and the bottom coupling that is inserted into the outer yoke 140 in framework 100 of the first magnet 110 are installed regularly.Be provided with two the second magnet 120 in the both sides of the first magnet 110.Each second magnet 120 is fixedly secured on the inner surface of outer yoke 140, and defines predetermined air gap 101 together with the first magnet 110.
The part of coiler part 150 is inserted in air gap 101 between the first magnet 110 and the 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 arranged in framework 100.
When input electrical signal, the first magnet 110 and the second magnet 120 produce magnetic field.Due to the magnetic field that magnet 110 and 120 produces, 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 to 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 the second magnet 120 along continuous straight runs of the inner surface of outer yoke 140, and described outer yoke 140 is inserted in framework 100.The 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 the second magnet 120, that is, and and S polarity or N polarity.
By shortening the first magnet 110 and the second magnet 120 in the length on short-axis direction and increasing by the first magnet 110 and the length of the second magnet 120 on long axis direction, promote the magnetic flux interconnection.In addition, the first magnet 110 is set to concordant each other with the second magnet 120.Thus, ultra slim type acoustic transducer according to the present invention makes the minimized in size on vertical direction by simplified assembly but do not reduce magnetic flux interconnection.
The first magnet 110 and the second magnet 120, center yoke 130 and outer yoke 140 consist of the closed magnetic circuit of ultra slim type acoustic transducer.The second magnet 120 have N polarity and closed magnetic circuit that the first magnet 110 has S polarity by forming from being connected to for the first magnetic circuit of the vertical upper surface of the first magnet 110 of magnet and from the first magnet 110 via center yoke 130 with the second magnetic circuit that the outer yoke 140 of center yoke 130 couplings is connected to the second magnet 120 via air gap 101 for the second magnet 120 of horizontal magnet, wherein be placed in the coiler part 150 and magnetic flux interconnection of phonate hole 201.
The first magnet 110 has N polarity and the second magnet 120 has the closed magnetic circuit of S polarity is connected to the first magnetic circuit of the second magnet 120 and forms via the second magnetic circuit that outer yoke 140 is connected to the first magnet 110 from the second magnet 120 via air gap 101 by the top from the first magnet 110.
More specifically, when the second magnet 120 has N polarity and the first magnet 110 has the S polarity chron, as finding on the minor axis surface, for the left half of the second magnet 120 of horizontal magnet has S polarity, right half has N polarity, for the lower part with the first magnet 110 of the vertical magnet of the second magnet 120 vertical symmetry has N polarity, and upper part has S polarity.Therefore, magnetic flux moves to the right from the left side in the second magnet 120, and moves to the bottom from the top in the first magnet 110.
In the first magnetic circuit, magnetic flux flows to the S utmost point of the upper surface that is formed on the first magnet 110 from the N utmost point of the right half that is formed on the second magnet 120 via air gap 101.In the second magnetic circuit, magnetic flux flows to the N utmost point of the lower part that is formed on the first magnet 110 from the S utmost point of the upper part that is formed on the first magnet 110, pass the center yoke 130 and the outer yoke 140 that are coupled to regularly the first magnet 110, and flow into the S utmost point of the left half that is formed on the second magnet 120.The first magnetic circuit and the second magnetic circuit consist of closed magnetic circuit.In this closed magnetic circuit, magnetic force even interconnects with sweep 152 weak, coiler part 150, and it is uniform making magnetic flux density.
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, the second magnet (120; Referring to Fig. 4) in couples with the outer yoke (140 that is inserted in framework 100; Referring to Fig. 4) inner surface coupling.The center yoke 130 that is coupled to regularly the first magnet 110 is coupled to outer yoke (140 regularly; Referring to Fig. 4) basal surface, wherein, the first magnet 110 is by air gap 101 and the second magnet (120; Referring to Fig. 4) separate.Be positioned at and be attached to outer yoke (140 fully; Referring to Fig. 4) 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) insertion space and rear 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, the element identical with the element of first embodiment of the invention uses identical label.
Figure 10 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of second embodiment of the invention.The first magnet 110 that in the vertical direction is magnetized is attached to center yoke 130, and a pair of the 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 the first magnet 110 adheres to and be coupled to outer yoke 140 is installed.Except the top board 190 that further arranges on the top of the first magnet 110, identical in above and other assembly of the second embodiment and the first embodiment.
In a second embodiment, will have N polarity and the first magnet 110 has the closed magnetic circuit of S polarity describes to the second magnet 120.As finding on the minor axis surface, the left half of the second magnet 120 has S polarity, and the right half of the second magnet 120 has N polarity, and the upper part of the first magnet 110 has S polarity, and its underpart has N polarity.
Therefore, in the first magnetic circuit, when with coiler part 150 interconnection, magnetic flux flows to the S utmost point of the first magnet 110 via air gap 101 and is formed on top board 190 on the first magnet 110 from the N utmost point of the right half that is formed on the second magnet 120.In the second magnetic circuit, magnetic flux is from top board 190, flow to the N utmost point of the lower part that is formed on the first magnet 110 from the S utmost point of the upper part that is formed on the first magnet 110, pass center yoke 130 and outer yoke 140, and flow into the S utmost point of the left half that is formed on the second magnet 120.The first magnetic circuit and the second magnetic circuit consist of closed magnetic circuit.In this closed magnetic circuit, magnetic force even interconnects with sweep 152 weak, coiler part 150, and it is uniform making magnetic flux density.
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 the first magnet 110, identical in the assembly of the ultra slim type acoustic transducer of the 3rd embodiment and coupling process and the first embodiment.Particularly, the upper surface of the first magnet 110 is set to the upper surface lower than the second magnet 120.
In the 3rd embodiment, the second magnet 120 had N polarity and the first magnet 110 has the closed magnetic circuit of S polarity describes.The left half of the second magnet 120 has S polarity, and its right half has N polarity, and the upper part of the first magnet 110 has S polarity, and its underpart has N polarity.
Therefore, in the first magnetic circuit, when with coiler part 150 interconnection, magnetic flux flows to the S utmost point of the upper part that is formed on the first magnet 110 from the N utmost point of the right half that is formed on the second magnet 120 via air gap 101.Due to the upper part of the first magnet 110 be set to relatively low, so promoted magnetic flux to flow in the first magnetic circuit.In the second magnetic circuit, magnetic flux flows to the N utmost point of the lower part that is formed on the first magnet 110 from the S utmost point of the upper part that is formed on the first magnet 110, pass center yoke 130 and outer yoke 140, and flows into the S utmost point of the left half that is formed on the second magnet 120.The first magnetic circuit and the second magnetic circuit consist of closed magnetic circuit.In this closed magnetic circuit, magnetic force even interconnects with sweep 152 weak, coiler part 150, and it is uniform making magnetic flux density.
Figure 13 is the stereogram that illustrates according to the part of the ultra slim type acoustic transducer of fourth embodiment of the invention.Comprise framework 100, the first magnet 110, the second magnet 120, yoke 130, coiler part 150, vibrating diaphragm 160, terminal 170 and protective device 200 according to the ultra slim type acoustic transducer of fourth embodiment of the invention.
In the 4th embodiment, the second magnet 120 had N polarity and the first magnet 110 has the closed magnetic circuit of S polarity describes.As finding on the minor axis surface, the left half of the second magnet 120 has S polarity, and its right half has N polarity, and the upper part of the first magnet 110 has S polarity, and its underpart has N polarity.
In the 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 of the upper part that is formed on the first magnet 110 via air gap 101.In the second magnetic circuit, magnetic flux flows to the N utmost point of the lower part that is formed on the first magnet 110 from the S utmost point of the upper part that is formed on the first magnet 110, pass core 132 and the periphery 133 of yoke 130, and flow into the S utmost point of the left half that is formed on the second magnet 120.This process is carried out repeatedly.In this closed magnetic circuit, magnetic force even interconnects with sweep 152 weak, coiler part 150, and it is uniform making magnetic flux density.
In the fifth embodiment of the present invention, closed magnetic circuit is made of the first magnet, the second magnet and path forming section.Except the forming section of path, identical in the assembly of the 5th embodiment and coupling process and the first embodiment.The 5th embodiment is not in the situation that have figure to be described in detail.
In the 5th embodiment, the first flux path is formed on the second magnet (120; Referring to Fig. 7) and the first magnet (110; Referring to Fig. 7) between air gap (101; Referring to Fig. 7) in, and the second magnetic flux routed path forming section (not shown) forms, this path forming section is with the first magnet (110; Referring to Fig. 7) be connected to the second magnet (120; Referring to Fig. 7).The first magnetic circuit and the second magnetic circuit consist of closed magnetic circuit.In this closed magnetic circuit, magnetic force even with weak, coiler part (150; Referring to Fig. 7) sweep (152; Referring to Fig. 7) interconnection, it is uniform making magnetic flux density.
Industrial applicibility
According to the present invention, in ultra slim type acoustic transducer, for the first magnet 110 of vertical magnet, be the 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 the first magnet 110 and the second magnet 120 is maximized, so the output level of the sound of playback or sound is amplified, but reduced the total quantity of assembly.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 be made by those skilled in the art various changes and modification in the spirit and scope of the present invention as described in the appended claims.
Claims (19)
1. ultra slim type acoustic transducer comprises:
The first magnet, this first magnet is vertical magnet;
The second magnet, this second magnet is horizontal magnet, and forms apart from the first magnet predetermined air gap is arranged;
The center yoke, the bottom coupling of this center yoke and the first magnet;
Outer yoke, the side surface coupling of this outer yoke and the second magnet, and be coupled with the center yoke;
Coiler part, this coiler part are inserted in described air gap at least in part;
Vibrating diaphragm is equipped with described coiler part on this vibrating diaphragm;
Protective device is for the protection of 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, be formed with the first magnetic circuit in described air gap between the first magnet and the second magnet, and be formed with the second magnetic circuit between the second magnet and the first magnet in described center yoke and outer yoke, consist of closed magnetic circuit by the first magnet and the second magnet, center yoke and outer yoke.
3. ultra slim type acoustic transducer as claimed in claim 2, wherein, in described the first magnetic circuit, magnetic flux flows between the upper surface of the side of the second magnet and the first magnet.
4. ultra slim type acoustic transducer as claimed in claim 1, wherein, described the second magnet is formed on two side surfaces of the first magnet in couples.
5. as the described ultra slim type acoustic transducer of arbitrary claim in claim 1 to 4, wherein, divide on the top of described the first magnet to be provided with top board.
6. ultra slim type acoustic transducer as claimed in claim 5, wherein, described the first magnetic circuit is formed between the second magnet and top board.
7. as the described ultra slim type acoustic transducer of arbitrary claim in claim 1 to 4, wherein, the upper surface of the first magnet is set to the upper surface lower than the 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;
The first magnet, this first magnet are the vertical magnet with the upper partial coupling of this core;
The second magnet, this second magnet is horizontal magnet, this horizontal magnet is limiting air gap in described space together with the first magnet, and with the coupling of the inner surface of described periphery;
Coiler part, this coiler part partly are inserted in described air gap;
Vibrating diaphragm is equipped with described coiler part on this vibrating diaphragm;
Protective device is for the protection of 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, be formed with the first magnetic circuit between the second magnet in described space and the first magnet in described air gap, and be formed with the second magnetic circuit in described core and periphery between the first magnet and the second magnet, consist of closed magnetic circuit by the first magnet and the second magnet and yoke.
10. ultra slim type acoustic transducer as claimed in claim 9, wherein, in described the first magnetic circuit, magnetic flux flows between the upper surface of the side of the second magnet and the first magnet.
11. ultra slim type acoustic transducer as claimed in claim 8, wherein, described the second magnet is formed on two side surfaces of the first magnet in couples.
12. as the described ultra slim type acoustic transducer of arbitrary claim in claim 8 to 11, wherein, divide on the top of described the first magnet to be provided with top board.
13. ultra slim type acoustic transducer as claimed in claim 12, wherein, described the first magnetic circuit is formed between the second magnet and described top board in described space.
14. a ultra slim type acoustic transducer comprises:
The first magnet;
The second magnet, described the second magnet forms apart from described the first magnet predetermined air gap, and have the direction of magnetization vertical with the direction of magnetization of described the first magnet, and be formed with the first magnetic circuit in the described air gap between described the first magnet and described the second magnet;
The center yoke, the bottom coupling of described center yoke and described the first magnet;
Outer yoke, the side surface coupling of described outer yoke and described the second magnet, and be coupled with the center yoke;
Coiler part, this coiler part are inserted in described air gap at least in part;
Vibrating diaphragm is equipped with described coiler part on this vibrating diaphragm; And,
Be formed with the second magnetic circuit between the second magnet and the first magnet in described center yoke and outer yoke.
15. ultra slim type acoustic transducer as claimed in claim 14, wherein, described the first magnet is vertical magnet, and described the second magnet is horizontal magnet.
16. as the described ultra slim type acoustic transducer of arbitrary claim in claim 14 to 15, wherein, in described the first magnetic circuit, magnetic flux flows between the upper surface of the side of the second magnet and the first magnet.
17. as the described ultra slim type acoustic transducer of arbitrary claim in claim 14 to 15, wherein, divide on the top of described the first magnet to be provided with top board.
18. ultra slim type acoustic transducer as claimed in claim 17, wherein, described the first magnetic circuit is formed between the second magnet and top board.
19. ultra slim type acoustic transducer as claimed in claim 14, wherein, described the second magnet is formed on the both sides of the 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 CN101803403A (en) | 2010-08-11 |
| CN101803403B true 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) |
Families Citing this family (3)
| 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 |
| CN105263090B (en) * | 2015-10-26 | 2019-01-11 | 苏州登堡电子科技有限公司 | Double-round formula bone conduction sensor |
| CN108760895B (en) * | 2018-04-13 | 2020-11-06 | 沈阳工业大学 | Electromagnetic ultrasonic elastic modulus measuring transducer structure |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090030188A (en) | 2009-03-24 |
| CN101803403A (en) | 2010-08-11 |
| KR100965740B1 (en) | 2010-06-24 |
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