WO2004039122A1 - 振動機能付き電気音響変換器およびその製造方法 - Google Patents
振動機能付き電気音響変換器およびその製造方法 Download PDFInfo
- Publication number
- WO2004039122A1 WO2004039122A1 PCT/JP2002/011062 JP0211062W WO2004039122A1 WO 2004039122 A1 WO2004039122 A1 WO 2004039122A1 JP 0211062 W JP0211062 W JP 0211062W WO 2004039122 A1 WO2004039122 A1 WO 2004039122A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resonance frequency
- frame
- vibration function
- electroacoustic transducer
- suspension
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49005—Acoustic transducer
Definitions
- Electroacoustic transducer with vibration function and method for manufacturing the same
- the present invention relates to an electroacoustic transducer having a vibration function and a method for manufacturing the same.
- FIG. 5A is a top view of the converter
- FIG. 5B is a cross-sectional view.
- the voice coil 10 a of the converter is fixed to the diaphragm 10.
- the magnetic circuit 11 is composed of a magnetic circuit main body 11a for generating a driving force when a current flows through the voice coil 10a, and a weight 11b integrally connected to the magnetic circuit main body 11a. It is configured.
- the weight lib is added for palpating the vibration of the vibrating part 13 to be described later, and if the vibration of the vibrating part 13 is sufficiently obtained, the weight lib is not added. There is also.
- the suspension 12 supports the magnetic circuit body 11 a and the weight 11 b on the frame 16.
- the vibrating part 13 is composed of the magnetic circuit 11 and the suspension 12 described above.
- the diaphragm 10 and the voice coil 10a constitute a mechanical resonance circuit of an acoustic unit. Further, the magnetic circuit 11 and the suspension 12 constitute a mechanical resonance circuit of the vibrating section 13.
- the weight portion 11b is a resin molded product mixed with tantalum powder, and the suspension 12 and the magnetic circuit body 11a are integrated with the weight portion 11b by insert molding.
- the baffle 17 is adhesively bonded to the peripheral edge of the diaphragm 10 and the frame Attached to 16.
- the voice coil 10a Since the voice coil 10a is disposed in the magnetic gap A of the magnetic circuit main body 11a, when an alternating current flows through the voice coil 10a, a driving force corresponding to the current is generated in the voice coil 10a. I do. Since the voice coil 10a is designed to be much lighter than the magnetic circuit 11, the magnetic circuit 11 does not vibrate at most frequencies, and the voice coil 10a vibrates. For this reason, at most frequencies, the diaphragm 10 vibrates and emits sound due to the vibration of the voice coil 10a.
- the mechanical resonance frequency of the vibrating section 13 is set to a frequency lower than the mechanical resonance frequency of the acoustic section because the driving of the vibrating section 13 causes the human body to touch the drive by vibration.
- the vibrating section 13 has a minimum mechanical impedance at the mechanical resonance frequency, and can generate a vibration to such an extent that the human body can be touched by a small driving force.
- the vibration force in this case is determined by the product of the weight of the vibrating section 13 (approximately the weight of the magnetic circuit 11) and the acceleration of the vibrating section 13.
- the mechanical resonance circuit has a sharp resonance (the head becomes high.)
- the problem is that the mechanical resonance frequency of the vibrating part 13 fluctuates with respect to the signal of the resonance frequency for vibrating the vibrating part 13 input to 10a, which appears as a large fluctuation in the vibration force. Variations in the mechanical resonance frequency are caused by variations in the weight of the vibrating portion 13, variations in the material thickness, width, Young's modulus of the suspension 12, and variations in the support position of the suspension 12.
- the present invention solves the above-mentioned problems, and provides an electroacoustic converter with a vibration function capable of reducing the variation in vibration force by adjusting the mechanical resonance frequency of the vibrating portion at low cost and manufacturing the same. It is intended to provide. ⁇ Disclosure of the invention
- An electroacoustic transducer with a vibration function includes a diaphragm, a voice coil attached to the diaphragm, a magnetic circuit provided with a magnetic gap into which the voice coil is fitted, and a suspension that couples the magnetic circuit to a frame.
- An electro-acoustic transducer with a vibration function comprising a vibrating part having a weight for attaching a resonance frequency adjustment to the vibrating part based on the result measured during manufacturing, or a frame based on the above result.
- the suspension is connected at a plurality of connection positions.
- the present invention is characterized in that the resonance frequency adjusting weight is mounted at a position where the center of gravity of the vibrating portion does not move.
- FIG. 1 is a top view of a vibrating section (before mounting a diaphragm) of one embodiment of the converter of the present invention.
- FIG. 2 is a top view of a vibrating section (before mounting of the diaphragm) of another embodiment.
- FIG. 3 is a cross-sectional view of a welded portion between the suspension and the frame
- FIG. 4 is a top view of a welded portion between the suspension and the frame of another embodiment
- FIG. 5A is a top view of a conventional converter
- FIG. 5B is the same sectional view.
- FIG. 1 is a top view of a vibrating part, which is a main part of an electroacoustic transducer with a vibration function according to one embodiment of the present invention.
- a converter is configured by mounting a resonance frequency adjusting weight on the weight portion.
- the magnetic circuit 11 is composed of a magnetic circuit main body 11a and a weight portion 11b that does not substantially constitute a magnetic circuit, and includes a magnetic circuit 11 and a suspension 12 (hatching portion).
- the vibrating part 13 is formed by.
- the four fixing portions 15 of the frame 16 and the suspension 12 are provided at symmetrical positions, and are bonded by bonding in the present embodiment. However, other known methods such as force crimping, welding, ⁇ It may be performed by attaching.
- the suspension 12 and the magnetic circuit body 11a are integrated by resin molding or the like when the weight portion 11b is formed.
- the weights 1 1 b are provided with two weights 14 for adjusting the resonance frequency of the vibrating section 13 for adjusting the mechanical resonance frequency of the vibrating section 13 at two places.
- the weight 14 is provided on a diagonal line passing through the position of the center of gravity of the magnetic circuit main body 11a and the overlap portion 11b. For this reason, even if the weight 14 is attached, the position of the center of gravity does not move in the plane direction and does not change.
- the mounting position of the weights 14 may be one or more than one as long as the above-mentioned position of the center of gravity is not changed.
- the vibrating section 13 can easily roll when vibrating.
- the vibration circuit 13 is formed by fixing the magnetic circuit 11 to the frame 16 via the suspension 12.
- the voice coil 10a mounted on the dummy diaphragm 10 is fitted into the magnetic gap of the magnetic circuit main body 11a, and a dummy current flows through the voice coil 10a.
- vibration is applied to the mechanical resonance circuit of the vibrating part from outside.
- the mechanical resonance frequency of the vibrating section 13 is measured. Note that the mechanical resonance frequency f. Is calculated by Equation 1 below.
- Equation 1 By measuring the mass (weight) m of the vibrating part in advance from Equation 1, the weight to be added to generate a predetermined resonance frequency in the vibrating part Calculate the weight of 14. This weight to be added 14 divided by the number of mounting locations (2 in this embodiment) is calculated as Attach to each mounting location by gluing etc.
- the transducer 10 is manufactured by fitting the actual diaphragm 10 with the voice coil 10a into the magnetic gap of the magnetic circuit 11 of the voice coil 10a and mounting it on the frame 16.
- the above manufacturing process can be incorporated into a production line and can be automated. In this way, it is possible to manufacture a transducer with a vibration function having the resonance frequency of the vibrating section 13 extremely efficiently and stably.
- the weight 14 it is necessary to set the weight before mounting the weight 14 slightly lighter in advance in order to adjust the mechanical resonance frequency of the vibrating part 13 by additionally mounting the weight 14. It is.
- the mechanical resonance frequency is higher than a predetermined mechanical resonance frequency. This makes it possible to relatively easily set the mechanical resonance frequency at the time of production within a predetermined tolerance of the mechanical resonance frequency.
- FIG. 2 is a top view of a vibrating portion of the converter according to Embodiment 2 of the present invention
- FIG. 3 is a cross-sectional view of a welded portion of the vibrating portion
- FIG. 4 is a top view of a welded portion of the vibrating portion in the developed example.
- the connection between the suspension 12 and the frame 16 is welding.
- four weldable areas are secured as weldable portions 12 a in the circumferential direction of the suspension 12 around the magnetic circuit 11.
- the mechanical resonance circuit of the vibrating section 13 is completed in a semi-finished product without the diaphragm 10, and the mechanical resonance frequency can be measured. It is. Therefore, in the same manner as in the first embodiment, a fabrication for obtaining a predetermined mechanical resonance frequency from a difference between a mechanical resonance frequency measured by mounting the dummy diaphragm 10 with the voice coil 10a and the predetermined mechanical resonance frequency is performed. Process.
- the welding fixed position of the suspension 12 and the frame 16 is calculated to obtain a predetermined mechanical resonance frequency. That is, the suspension 12 and the frame 16 are welded and fixed in advance, and the position obtained by the calculation is fixed again by welding to change the length of the suspension 12 that substantially supports the vibrating portion 13. By this operation, the mechanical resonance frequency is set to a predetermined value.
- the first welding fixed position is set in advance to be lower than the predetermined mechanical resonance frequency. Specifically, it is important that the support of the suspension 12 is made longer, and after the measurement of the mechanical resonance frequency, welding and fixing are again performed to obtain a predetermined mechanical resonance frequency. As a result, it is possible to relatively easily set the mechanical resonance frequency within a predetermined tolerance during production.
- FIG. 4 shows a development example of the present embodiment, in which the weldable portion 12a is extended in the circumferential direction of the suspension 12 in the above-described second embodiment.
- the portion 12b is further widened in the radial direction.
- the welding position for setting a predetermined mechanical resonance frequency is the initial welding position.
- the width direction is widened to obtain stable welding conditions.
- the mechanical resonance frequency is about 120 Hz for a 20 mm square size product
- a fine adjustment of about 0.2 to 0.4 mm is required to change the resonance frequency by 2 Hz. Therefore, there is a possibility of overlapping and welding.
- the width of the suspension of the weldable portion 1 2 b larger than the width of the other portions, the influence of the weldable portion 1 2 b on the overall compliance of the suspension 12 b is reduced.
- the change amount of the welding position can be set large. With such a configuration, the welded portions are prevented from overlapping.
- the suspension 12 has been described assuming that the weight portion 11 b side is integrated with resin molding, and that only the frame 16 and the suspension 12 are welded and fixed.
- the present invention is not limited to the above description, and the weight portion 11 b may be formed of a weldable metal such as iron and fixed to the suspension 12 by welding. In that case, it is also possible to set a predetermined mechanical resonance frequency between the suspension 12 and the weight portion 11b. However, in terms of productivity, it is more efficient to perform welding and fixing between the easily fixed frame 16 and suspension 12.
- the mechanical resonance frequency of the vibrating portion of the transducer is measured at least after the assembly of the individual vibrating portions to the frame is completed, and the predetermined value is determined from the difference from the predetermined mechanical resonance frequency.
- the method for setting the mechanical resonance frequency of the above has been described.
- the vibrating section in which the weight / suspension is previously integrated with the magnetic circuit can be supplied extremely stably.
- a sample of one or more vibrating parts in the same lot should be extracted, and the vibrating parts of this sample should be incorporated into the frame as in each of the above embodiments to determine the resonance frequency adjustment weight and determine the welding fixed position.
- the vibrating parts of this sample should be incorporated into the frame as in each of the above embodiments to determine the resonance frequency adjustment weight and determine the welding fixed position.
- the stabilization of the mechanical resonance frequency of the vibrating section can be efficiently achieved when manufacturing an electroacoustic transducer having a vibration function. Therefore, it is possible to provide an inexpensive electro-acoustic transducer having a vibration function with stable quality, and it is an industrially effective dog.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN02802569.5A CN100512508C (zh) | 2002-10-24 | 2002-10-24 | 带有振动功能的电音响变换器及其制造方法 |
PCT/JP2002/011062 WO2004039122A1 (ja) | 2002-10-24 | 2002-10-24 | 振動機能付き電気音響変換器およびその製造方法 |
EP02773005.0A EP1562397B1 (en) | 2002-10-24 | 2002-10-24 | Electroacoustic transducer with vibration function and its manufacturing method |
US10/380,281 US7082668B2 (en) | 2002-10-24 | 2002-10-24 | Electro-acoustic transducer having vibrating function and method of manufacturing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/011062 WO2004039122A1 (ja) | 2002-10-24 | 2002-10-24 | 振動機能付き電気音響変換器およびその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004039122A1 true WO2004039122A1 (ja) | 2004-05-06 |
Family
ID=32170781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/011062 WO2004039122A1 (ja) | 2002-10-24 | 2002-10-24 | 振動機能付き電気音響変換器およびその製造方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7082668B2 (ja) |
EP (1) | EP1562397B1 (ja) |
CN (1) | CN100512508C (ja) |
WO (1) | WO2004039122A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3891094B2 (ja) * | 2002-10-25 | 2007-03-07 | 松下電器産業株式会社 | 振動機能付き電気音響変換器およびその製造方法 |
DE602004013604D1 (de) * | 2003-08-19 | 2008-06-19 | Matsushita Electric Ind Co Ltd | Lautsprecher |
JP4475993B2 (ja) * | 2004-03-22 | 2010-06-09 | 並木精密宝石株式会社 | 多機能型振動アクチュエータ及び携帯端末機器 |
CN101601309B (zh) * | 2007-02-02 | 2014-06-25 | 并木精密宝石株式会社 | 多功能型振动促动器 |
JP5007413B2 (ja) * | 2007-07-19 | 2012-08-22 | 並木精密宝石株式会社 | サスペンション構造 |
US9185492B2 (en) * | 2009-04-10 | 2015-11-10 | Immerz, Inc. | Systems and methods for acousto-haptic speakers |
CN101902115B (zh) * | 2009-05-25 | 2013-02-13 | 三星电机株式会社 | 线性振动器 |
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 |
CN202004956U (zh) * | 2010-12-31 | 2011-10-05 | 瑞声光电科技(常州)有限公司 | 发声器 |
EP3987823A1 (en) | 2019-08-30 | 2022-04-27 | Google LLC | Suspension for moving magnet actuator |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000217182A (ja) * | 1999-01-21 | 2000-08-04 | Kenwood Corp | 加振ウ―ハ |
JP2001239211A (ja) * | 2000-02-29 | 2001-09-04 | Citizen Electronics Co Ltd | 多機能型発音体およびその製造方法 |
EP1215934A2 (en) | 2000-12-15 | 2002-06-19 | Citizen Electronics Co., Ltd. | Multifunction acoustic device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3704977B2 (ja) | 1998-11-20 | 2005-10-12 | 松下電器産業株式会社 | 電気−機械−音響変換器 |
JP3538043B2 (ja) * | 1998-11-26 | 2004-06-14 | 東京パーツ工業株式会社 | 耐衝撃性良好な電磁型変換器 |
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 |
US7003130B2 (en) * | 2003-01-29 | 2006-02-21 | Samsung Electro-Mechanics Co., Ltd. | Resonance frequency correction method and vibration speaker |
US7421088B2 (en) * | 2003-08-28 | 2008-09-02 | Motorola, Inc. | Multifunction transducer |
-
2002
- 2002-10-24 CN CN02802569.5A patent/CN100512508C/zh not_active Expired - Fee Related
- 2002-10-24 US US10/380,281 patent/US7082668B2/en not_active Expired - Lifetime
- 2002-10-24 EP EP02773005.0A patent/EP1562397B1/en not_active Expired - Fee Related
- 2002-10-24 WO PCT/JP2002/011062 patent/WO2004039122A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000217182A (ja) * | 1999-01-21 | 2000-08-04 | Kenwood Corp | 加振ウ―ハ |
JP2001239211A (ja) * | 2000-02-29 | 2001-09-04 | Citizen Electronics Co Ltd | 多機能型発音体およびその製造方法 |
EP1215934A2 (en) | 2000-12-15 | 2002-06-19 | Citizen Electronics Co., Ltd. | Multifunction acoustic device |
JP2002186074A (ja) * | 2000-12-15 | 2002-06-28 | Citizen Electronics Co Ltd | 多機能型発音体 |
Also Published As
Publication number | Publication date |
---|---|
CN1543752A (zh) | 2004-11-03 |
CN100512508C (zh) | 2009-07-08 |
US20040081331A1 (en) | 2004-04-29 |
EP1562397B1 (en) | 2013-12-04 |
EP1562397A1 (en) | 2005-08-10 |
US7082668B2 (en) | 2006-08-01 |
EP1562397A4 (en) | 2009-02-18 |
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