WO2004039125A1 - 電気音響変換器およびその製造方法 - Google Patents
電気音響変換器およびその製造方法 Download PDFInfo
- Publication number
- WO2004039125A1 WO2004039125A1 PCT/JP2003/012951 JP0312951W WO2004039125A1 WO 2004039125 A1 WO2004039125 A1 WO 2004039125A1 JP 0312951 W JP0312951 W JP 0312951W WO 2004039125 A1 WO2004039125 A1 WO 2004039125A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- suspension
- diaphragm
- metal plate
- coupled
- Prior art date
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/244—Overlap seam welding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
-
- 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
- H04R9/066—Loudspeakers using the principle of inertia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/07—Suspension between moving magnetic core and housing
Definitions
- Electroacoustic transducer and method for manufacturing the same
- the present invention relates to an electro-acoustic transducer for generating a ringing sound and a ringing vibration used in a mobile communication device such as a mobile phone, and a method of manufacturing the same.
- FIG. 4 is a cross-sectional view of a conventional electric-mechanical / acoustic converter disclosed in Japanese Patent Application Laid-Open No. 2000-153032, and FIG. 5 is an exploded perspective view thereof.
- Diaphragm 1 is joined to frame 2 whose outer periphery is formed by resin molding.
- One end of the voice coil 3 is adhesively bonded to the diaphragm 1.
- An upper plate 6 is adhesively bonded on the magnet 5 adhesively bonded on the yoke 4.
- the yoke 4, the magnet 5, and the upper plate 6 form a magnetic circuit 7, and the other end of the voice coil 3 does not contact the magnetic gap 8 between the yoke 4 and the upper plate 6.
- each of the suspensions 9 a and 9 b connected to the upper and lower sides of the yoke 4 is connected to and supported by the frame 2.
- a resin molded product 9c is provided at the tip of each of the suspensions 9a and 9b by artsert molding and integrally with the suspensions 9a and 9b.
- the resin molded product 9c and the frame 2 are adhesively bonded, and the frame 2 and the suspensions 9a and 9b are bonded.
- the yoke 4 and the suspensions 9a and 9b are joined by laser welding.
- the cover 2 a is joined to the frame 2 and covers the outer periphery of the yoke 4.
- the resonance frequency of the magnetic circuit 7 is set to about 100 Hz, and the resonance frequency of the vibrating part is set to about 1 kHz.
- the user can sense vibration and sense sound with the electro-mechanical / acoustic transducer.
- the magnetic circuit 7 When the frequency of the input signal matches the resonance frequency of the magnetic circuit 7, the magnetic circuit 7 largely vibrates due to resonance. However, since the frequency of the vibration of the diaphragm 1 generated as a reaction of the vibration of the magnetic circuit 7 is low, the user cannot perceive the vibration as sound.
- the diaphragm 1 vibrates greatly due to resonance, and the user senses the vibration as sound.
- the mass of the magnetic circuit 7 is large and the frequency of the input vibration is high, the magnetic circuit 7 cannot follow the high frequency, and the vibration of the magnetic circuit 7 generated as a reaction of the vibration of the diaphragm 1 has a large amplitude. No.
- the yoke 4 is provided with nickel plating and tin plating on the surface thereof in order to secure the coupling strength of the vibrating portion.
- the suspensions 9a and 9b are welded and joined to the yoke 4 by laser irradiation. Variations in bonding strength may occur due to variations in plating thickness and variations in laser irradiation, and the management of processes to suppress the variations is complicated. Disclosure of the invention
- the electroacoustic transducer includes a sound generator, a vibrator, and a housing.
- the sounding unit includes a diaphragm and a voice coil coupled to the diaphragm.
- the vibrating part includes a magnetic circuit having a magnetic gap in which the voice coil is located, and a suspension made of metal having a first end coupled to the magnetic circuit and supporting the magnetic circuit in a vibrating manner.
- the housing includes a metal plate coupled to the outer periphery of the diaphragm and coupled to the second end of the suspension. Metal plate and suspension The electroacoustic transducer is stable and can be produced. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a sectional view of an electroacoustic transducer according to an embodiment of the present invention.
- FIG. 2 is an exploded top view of the electroacoustic transducer according to the embodiment.
- FIG. 3A is a cross-sectional view taken along line 3-3 of the electroacoustic transducer shown in FIG.
- FIG. 3B is a cross-sectional view taken along line 3-3 of another electroacoustic transducer according to the embodiment.
- FIG. 4 is a cross-sectional view of a conventional electromechanical Z acoustic transducer.
- FIG. 5 is an exploded perspective view of a conventional electric machine Z acoustic transducer. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a sectional view of an electroacoustic transducer according to an embodiment of the present invention
- FIG. 2 is an exploded top view thereof.
- FIG. 3A is a cross-sectional view of the electro-acoustic transducer shown in FIG. 2 taken along line 3-3.
- Diaphragm 11 is connected to first housing 12a whose outer periphery is formed by resin molding.
- One end of the voice coil 13 is adhesively bonded to the diaphragm 11.
- a plate 6 is adhesively bonded on a magnet 15 adhesively bonded on a yoke 14.
- Work 14, magnet 15, and plate 16 form a magnetic circuit 17. The other end of the voice coil 13 does not contact the magnetic gap 18 between the yoke 14 and the plate 16.
- the yoke 14 is composed of a yoke main body 14a made of a magnetic material and a weight portion 14b provided on the outer periphery thereof and having a high specific gravity formed by resin molding mixed with tungsten powder.
- a suspension 19 made of a thin stainless steel plate is integrated with the weight portion 14 b by outsert molding at the time of resin molding, and the vibrating portion 20 is formed by the yoke 14 and the suspension 19.
- the other end of the suspension 19 is combined with a second housing 12 b made of a thin stainless steel plate and joined by laser welding with a YA G laser to form the vibrating section 20 into the housing 12 b It is supported so that it can move up and down.
- the housing 12b is mounted on the housing 12a to form the electroacoustic transducer according to the embodiment.
- a signal is input to voice coil 13.
- the frequency of this input signal matches the mechanical resonance frequency of the vibrating section 20 including the suspension 19 and the magnetic circuit 17, the magnetic circuit 17 vibrates up and down greatly and incorporates an electroacoustic transducer.
- the user of a portable communication device feels the vibration (eg, 130 Hz).
- the frequency of the input signal is an audio frequency of about 500 Hz to 10 kHz, the diaphragm 11 vibrates according to the input signal, and the user senses the vibration as sound.
- the resonance frequency of the vibrating section 20 including the magnetic circuit 17 is set to about 100 Hz, and the resonance frequency of the sound generating section 21 is set to about 1 kHz.
- the user can feel the vibration and sense the sound with the electroacoustic transducer.
- the magnetic circuit 17 vibrates largely due to resonance.
- the frequency of the vibration of the diaphragm 11 generated as a reaction of the vibration of the magnetic circuit 17 is low, the user cannot perceive the vibration as sound.
- the diaphragm 11 vibrates greatly due to resonance, and the user uses the vibration as sound.
- the sound is generally used as a ringer sound as a ringer.
- the magnetic circuit 17 cannot follow the high frequency, and the magnetic circuit 17 generated as a reaction of the vibration of the diaphragm 11 Does not have a large amplitude.
- sound generator 21 has a resonance frequency of about 1 kHz, and a ringer sound of that frequency is used as a ringing sound. If a melody tone is used instead of a ringer tone, The signal is input to the voice coil 13 and the diaphragm 11 emits a melody sound.
- the sound generator 21 has a flat vibration characteristic (sound pressure frequency characteristic) in the audible frequency range of, for example, 500 Hz to 10 kHz, and is set so that the resonance frequency point is not emphasized. Have been.
- the housing 12b is provided with a step portion 12c by drawing, and the other end of the suspension 19 overlaps the flat portion 12 ⁇ of the step portion 12c. They are welded together by laser irradiation from above.
- the flat portion 12 f of the step portion 12 c and the side wall of the second housing 12 b are connected via the connecting portion 12 g. If the step 12c does not have a sufficient area for the welding allowance, as shown in Fig. 3B, at least only the vicinity of the joint with the suspension 19 is further drawn so that the pedestal 1 2 e may be formed. As a result, the welding allowance and the suspension 19 can be easily positioned.
- the amount of laser irradiation is such that the welding marks are visible from the opposite side of the second casing 12b, and the state of the welding marks is used to determine the quality of the joint.
- the position and size of the pedestal 12 e provided by drawing can be arbitrarily set, that is, the weldable portion can be easily set.
- a corner serving as a fulcrum when the suspension 19 signals may be a corner 12 d having a small radius of curvature. This corner stabilizes the vertical vibration of the suspension, and stabilizes the vibration characteristics and resonance frequency of mechanical vibration.
- Welding by YAG laser irradiation can limit the welding location to a very local area, and can limit the effect of heat on the vicinity. Therefore, it is suitable for welding small electronic components.
- Other welding methods using laser irradiation can also weld only the joints.
- the suspension 19 and the second housing 12b are thin plates of stainless steel.
- the laser is irradiated on the surface opposite to the surface on which the laser is irradiated, in such an amount that the welding marks can be visually recognized. As described above, the quality of welding can be determined based on the welding marks.
- the determination of welding based on this welding mark can also be applied to the confirmation of welding of other parts having a thin metal sheet, whereby the thin metal sheet is securely welded, and a device equipped with the part can be manufactured stably.
- the shape of the inner periphery of the above-mentioned corner of the step portion 12c tends to be an arc due to drawing.
- the corner 12d is formed by reducing the radius of curvature of the arc. If the radius of curvature of the corner 12 d changes by more than 1.0 mm when the suspension 19 is driven up and down, the mechanical resonance frequency S changes. Therefore, it is difficult to set a welding position for obtaining a predetermined resonance frequency.
- the radius of curvature of the corner portion 12d is preferably less than 1.0 mm, and more preferably 0.8 mm or less, because more stable vibration characteristics can be obtained.
- a corner portion 12d having a predetermined radius of curvature may not be formed depending on the material of the second housing 12b.
- a thin plate made of the same material as the housing 12b and the suspension 19 may be interposed between the step portion 12b and the suspension 19 and welded. Thereby, it is not necessary to form the corner 12 d having the predetermined radius of curvature.
- welding is performed using a YAG laser. If welding marks can be left on the opposite side of the joint by laser irradiation, the state of welding can be visually recognized even by using another laser such as a semiconductor laser.
- the electro-acoustic transducer according to the present embodiment includes one type of suspension 19, as in the conventional electro-mechanical / acoustic transducer shown in FIG. May be used.
- the two steps 12c have different heights, and the above two types of suspensions are respectively joined.
- the productivity is extremely excellent, and the suspension and the housing are stably joined.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/499,189 US7316289B2 (en) | 2002-10-25 | 2003-10-09 | Electro-acoustic transducer and method of manufacturing transducer |
AU2003271142A AU2003271142A1 (en) | 2002-10-25 | 2003-10-09 | Electroacoustic transducer and process for producing the same |
KR1020047010145A KR100592930B1 (ko) | 2002-10-25 | 2003-10-09 | 전기 음향 변환기 및 그 제조 방법 |
EP03751407A EP1453354A4 (en) | 2002-10-25 | 2003-10-09 | ELECTRIC ACOUSTIC CONVERTER AND PROCESS FOR ITS MANUFACTURE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002310761A JP3891094B2 (ja) | 2002-10-25 | 2002-10-25 | 振動機能付き電気音響変換器およびその製造方法 |
JP2002-310761 | 2002-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004039125A1 true WO2004039125A1 (ja) | 2004-05-06 |
Family
ID=32171059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/012951 WO2004039125A1 (ja) | 2002-10-25 | 2003-10-09 | 電気音響変換器およびその製造方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7316289B2 (ja) |
EP (1) | EP1453354A4 (ja) |
JP (1) | JP3891094B2 (ja) |
KR (1) | KR100592930B1 (ja) |
CN (1) | CN1685759A (ja) |
AU (1) | AU2003271142A1 (ja) |
TW (1) | TWI292279B (ja) |
WO (1) | WO2004039125A1 (ja) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3966318B2 (ja) * | 2004-09-09 | 2007-08-29 | セイコーエプソン株式会社 | 電気光学装置及び電子機器 |
KR100661921B1 (ko) * | 2005-04-15 | 2006-12-27 | 삼성전기주식회사 | 진동 및 음향 발생장치와 이에 사용되는 요크 |
US7565949B2 (en) * | 2005-09-27 | 2009-07-28 | Casio Computer Co., Ltd. | Flat panel display module having speaker function |
CN101304622A (zh) * | 2007-05-09 | 2008-11-12 | 富准精密工业(深圳)有限公司 | 电声装置的音膜结构及其制备方法 |
TWI437798B (zh) * | 2009-12-30 | 2014-05-11 | Hon Hai Prec Ind Co Ltd | 彈片及採用該彈片之音圈馬達 |
CN201839419U (zh) * | 2010-05-10 | 2011-05-18 | 瑞声声学科技(深圳)有限公司 | 多功能振动器件 |
JP2012010148A (ja) * | 2010-06-25 | 2012-01-12 | Sanyo Electric Co Ltd | 電気音響変換装置 |
CN201995121U (zh) * | 2010-12-21 | 2011-09-28 | 瑞声光电科技(常州)有限公司 | 振动发声装置 |
CN102256196B (zh) * | 2011-01-26 | 2015-06-03 | 歌尔声学股份有限公司 | 微型动圈式电声转换器及其组装方法 |
CN102413413B (zh) * | 2011-12-17 | 2015-01-21 | 歌尔声学股份有限公司 | 电声换能器的制造方法 |
KR101410393B1 (ko) * | 2012-09-25 | 2014-06-23 | 주식회사 에스제이앤에스 | 스피커 프레임 및 이를 구비한 스피커 |
CN103763667B (zh) * | 2013-12-31 | 2017-10-13 | 瑞声声学科技(深圳)有限公司 | 多功能电声器件 |
CN108322869B (zh) * | 2018-01-24 | 2021-01-15 | 瑞声科技(新加坡)有限公司 | 发声器件 |
CN109362022B (zh) * | 2018-11-02 | 2020-12-11 | 歌尔股份有限公司 | 一种发声装置及其加工方法以及耳机 |
CN209390333U (zh) * | 2018-12-28 | 2019-09-13 | 瑞声科技(新加坡)有限公司 | 一种发声装置 |
CN110177324B (zh) | 2019-05-15 | 2021-01-08 | 维沃移动通信有限公司 | 扬声器及终端设备 |
GB2591344B (en) * | 2020-01-07 | 2022-06-22 | Tymphany Acoustic Tech Ltd | Non-dispensing manufacturing process for making speaker and speaker thereof |
RU2746715C1 (ru) * | 2020-08-14 | 2021-04-19 | Общество С Ограниченной Ответственностью "Синеморе" | Плоский низкочастотный громкоговоритель |
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JPH117285A (ja) * | 1997-06-18 | 1999-01-12 | Sanyo Electric Co Ltd | 振動式報知器に用いる板バネ、音響・振動併用式報知器及び携帯型電子機器 |
JP2001104881A (ja) * | 1999-10-08 | 2001-04-17 | Hitachi Media Electoronics Co Ltd | 振動発生装置及びそれを用いた携帯用端末機器、携帯用通信機器 |
JP2001300422A (ja) * | 2000-04-21 | 2001-10-30 | Citizen Electronics Co Ltd | 多機能変換器とその駆動方法 |
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US5528697A (en) * | 1991-05-17 | 1996-06-18 | Namiki Precision Jewel Co., Ltd. | Integrated vibrating and sound producing device |
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WO2004039122A1 (ja) * | 2002-10-24 | 2004-05-06 | Matsushita Electric Industrial Co., Ltd. | 振動機能付き電気音響変換器およびその製造方法 |
-
2002
- 2002-10-25 JP JP2002310761A patent/JP3891094B2/ja not_active Expired - Fee Related
-
2003
- 2003-10-09 CN CNA2003801000672A patent/CN1685759A/zh active Pending
- 2003-10-09 US US10/499,189 patent/US7316289B2/en not_active Expired - Fee Related
- 2003-10-09 WO PCT/JP2003/012951 patent/WO2004039125A1/ja active Application Filing
- 2003-10-09 EP EP03751407A patent/EP1453354A4/en not_active Withdrawn
- 2003-10-09 AU AU2003271142A patent/AU2003271142A1/en not_active Abandoned
- 2003-10-09 KR KR1020047010145A patent/KR100592930B1/ko not_active IP Right Cessation
- 2003-10-17 TW TW092128928A patent/TWI292279B/zh active
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JPH117285A (ja) * | 1997-06-18 | 1999-01-12 | Sanyo Electric Co Ltd | 振動式報知器に用いる板バネ、音響・振動併用式報知器及び携帯型電子機器 |
JP2001104881A (ja) * | 1999-10-08 | 2001-04-17 | Hitachi Media Electoronics Co Ltd | 振動発生装置及びそれを用いた携帯用端末機器、携帯用通信機器 |
JP2001300422A (ja) * | 2000-04-21 | 2001-10-30 | Citizen Electronics Co Ltd | 多機能変換器とその駆動方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1453354A4 * |
Also Published As
Publication number | Publication date |
---|---|
US7316289B2 (en) | 2008-01-08 |
AU2003271142A1 (en) | 2004-05-13 |
CN1685759A (zh) | 2005-10-19 |
TWI292279B (en) | 2008-01-01 |
US20050018869A1 (en) | 2005-01-27 |
JP2004147161A (ja) | 2004-05-20 |
EP1453354A1 (en) | 2004-09-01 |
KR20040068356A (ko) | 2004-07-30 |
JP3891094B2 (ja) | 2007-03-07 |
TW200420169A (en) | 2004-10-01 |
KR100592930B1 (ko) | 2006-06-26 |
EP1453354A4 (en) | 2010-09-01 |
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