WO2011013462A1 - Transducteur électroacoustique comportant une fonction de vibration - Google Patents

Transducteur électroacoustique comportant une fonction de vibration Download PDF

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Publication number
WO2011013462A1
WO2011013462A1 PCT/JP2010/060203 JP2010060203W WO2011013462A1 WO 2011013462 A1 WO2011013462 A1 WO 2011013462A1 JP 2010060203 W JP2010060203 W JP 2010060203W WO 2011013462 A1 WO2011013462 A1 WO 2011013462A1
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WO
WIPO (PCT)
Prior art keywords
frame
vibration
fixed
electroacoustic transducer
suspension
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Application number
PCT/JP2010/060203
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English (en)
Japanese (ja)
Inventor
宙軌 加藤
政人 船木
Original Assignee
三洋電機株式会社
三洋精密株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社, 三洋精密株式会社 filed Critical 三洋電機株式会社
Publication of WO2011013462A1 publication Critical patent/WO2011013462A1/fr

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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

Definitions

  • the present invention relates to an electroacoustic transducer with a vibration function including a diaphragm that generates sound waves and a suspension that generates mechanical vibrations.
  • mobile terminal devices such as mobile phones and PDAs are used to notify the user of incoming calls by generating a buzzer sound or melody sound, or switching the device housing to vibrate without producing a sound. It is configured to.
  • a structure in which a speaker for generating sound similar to a small speaker and a vibration generator that generates vibration by rotating an eccentric weight with a small motor has been adopted.
  • incorporating both the speaker and the vibrator in this manner is disadvantageous in terms of downsizing and cost reduction of the device. Therefore, in recent years, a multi-function vibration actuator, which is a magnetically driven actuator that generates both sound and vibration with a single one, has been used. Such a multifunction vibration actuator is disclosed.
  • a voice coil 18 joined to the diaphragm 11 includes a yoke 103, a magnet 104, a plate 105, and a weight 9, and an inner peripheral surface of the yoke 103 and an outer peripheral surface of the magnet 104 and the plate 105.
  • the magnetic gap 35 to be formed is sandwiched between the gaps.
  • the yoke 103 may double as the yoke.
  • the magnetic circuit 17 is attached to the suspension 19 and can vibrate mechanically.
  • the outer peripheral portion of the diaphragm 13 is attached to the frame 12, and the frame 12 is directly connected to the suspension 19 to which the magnetic circuit 17 is attached. Therefore, when the electroacoustic transducer with a vibration function is continuously operated, the natural frequency (f0) of the mechanical vibration is changed due to the deterioration of the bonding material 4 or the like, and the vibration of the mechanical vibration is reduced. In addition, there is a problem that reliability is impaired.
  • the present invention aims to realize an electroacoustic transducer with a vibration function that solves the above-mentioned problems.
  • An electroacoustic transducer with a vibration function includes a frame, a diaphragm fixed to the frame, a voice coil fixed to a lower side of the diaphragm, and a magnetic circuit fixed to the frame.
  • the magnetic circuit unit is formed with a magnetic gap, and the voice coil maintains a gap in the magnetic gap.
  • the diaphragm is sandwiched and acoustically vibrated by the magnetic circuit unit, The magnetic circuit unit is mechanically vibrated by the suspension, and the suspension is fixed to the frame via a buffer member.
  • the buffer member is made of a metallic ring, and the ring is fixed to the frame by a bonding material.
  • the ring and the suspension are fixed by laser welding.
  • the ring is integrated with the frame.
  • the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed while minimizing the change in the resonance frequency during continuous operation, and the initial vibration can be provided over a long period of time. Further, since the suspension bonding material does not adhere, a natural vibration f0 of mechanical vibration as designed can be obtained. Further, by integrating the ring and the frame, the manufacturing process can be facilitated and the time can be shortened, and the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed.
  • FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 2 is an enlarged view of the vicinity of a frame according to Embodiment 1.
  • FIG. It is sectional drawing of the electroacoustic transducer with a vibration function which concerns on Embodiment 2 of this invention. It is sectional drawing of the electroacoustic transducer with a vibration function of a prior art example. It is a frame vicinity enlarged view of the electroacoustic transducer with a vibration function of a prior art example. It is a graph of the continuous load test which concerns on Embodiment 1 of this invention. It is a graph of the continuous load test which concerns on a prior art example.
  • FIG. 1 is a perspective view illustrating a configuration of an electroacoustic transducer 10 according to the first embodiment. This has an outer diameter of ⁇ 10 to ⁇ 20 mm and an overall height t of 3 to 5 mm. However, the size can be freely changed depending on the equipment.
  • FIG. 2 is a cross-sectional view of the electroacoustic transducer shown in FIG. 1 taken along line AA ′.
  • an electroacoustic transducer 10 includes a frame 1, a diaphragm 2, a voice coil 21, a magnetic circuit 3, a suspension 5, and a buffer member 6.
  • the magnetic circuit 3 includes a weight 9.
  • the magnetic circuit 3 can be used without the weight 9.
  • the voice coil 21 fixed to the lower side of the diaphragm 2 is prepared.
  • a recess is formed in the yoke 31, and a disk-shaped magnet 33 is fixed to the recess with an adhesive.
  • a disk-shaped plate 32 is fixed to the upper surface of the magnet 33 with an adhesive.
  • a ring-shaped magnetic gap portion 35 is formed between the inner peripheral surface of the recess of the yoke 31, the outer peripheral surface of the plate 32, and the magnet 33.
  • the shapes of the yoke 31 and the magnet 33 are arbitrary, and a track shape, a square shape, and the like are also possible. Thereafter, the weight 9 is fixed to the yoke 31 to form the magnetic circuit 3, and the suspension 5 is further fixed.
  • a metallic ring 6, which is a buffer member 6, is fixed to the lower side portion of the cylindrical frame 1 with a bonding material 4.
  • the shape of the frame 1 can be changed.
  • the magnetic circuit 3 is suspended in the frame 1 by fixing the suspension 5 to the ring 6 by laser welding.
  • the suspension 5 is indirectly fixed to the frame 1 after the ring 6 is fixed to the frame 1 with the bonding material 4, the bonding material 4 does not adhere to the suspension 5. Furthermore, even if the bonding material 4 droops at worst, it does not reach the suspension 5 due to the thickness of the ring 6. As described above, the suspension 5 is not directly connected to the frame 1 because the bonding material 4 protrudes from the suspension 5 when the bonding material 4 is applied, and the natural frequency f0 of the mechanical vibration varies. is there. Further, if the bonding material 4 is attached to the suspension 5, the natural frequency f0 of the mechanical vibration changes when the electroacoustic transducer with a vibration function is continuously operated, causing a problem in reliability. The change data of the natural frequency f0 of the mechanical vibration will be described later.
  • the magnet cover 36 is fixed to the lower part of the frame 1.
  • the magnet cover 36 is formed with an air vent hole 37, and even if the magnetic circuit 3 vibrates, the magnetic circuit 3 can move smoothly because the air escapes.
  • the diaphragm 2 to which the voice coil 21 is connected is fixed to the upper part of the frame 1. At this time, the voice coil 21 is sandwiched with a gap in the magnetic gap 35 of the magnetic circuit 3. Further, the diaphragm cover 7 may be fixed at the same time. Next, as shown in FIG. 1, the voice coil 21 is connected to the external electrode terminal 8 for exchanging signals with the outside.
  • the electroacoustic transducer with vibration function 10 is completed, and two vibration systems are formed inside the cylindrical frame 1.
  • the first vibration system is composed of the suspension 5 and the magnetic circuit 3
  • the second vibration system is composed of the diaphragm 2 and the voice coil 21.
  • the first vibration system has a natural frequency f0 of about 150 Hz to 200 Hz, and the second vibration system can reproduce sound in an audible band of 300 Hz to 20 kHz.
  • the first vibration system resonates and a mechanical vibration that can be experienced is emitted. Further, by supplying an alternating current having a natural frequency of the second vibration system to the pair of external electrode terminals 8, the second vibration system resonates and audible acoustic vibration (ringer sound, melody sound) is emitted. .
  • the second embodiment eliminates the bonding material 4 used in the first embodiment by using the frame 11 in which the ring 6 is integrally formed with the frame 1 of the first embodiment. Other than that, it manufactured similarly to Embodiment 1.
  • FIG. By integrating the ring 6 into the frame 11, there is no bonding material 4, so it does not adhere to the suspension 5, and the natural frequency f 0 of mechanical vibration does not change. Furthermore, the manufacturing process is easy and the process time can be reduced.
  • Table 1 shows test results in continuous operation at the natural frequency f0 of the mechanical vibration of the suspension 5 in the first embodiment of the present invention and the conventional example.
  • FIG. 7 shows a change in the first embodiment
  • FIG. 8 shows a conventional example with respect to a change in acceleration of mechanical vibration from 130 Hz to 170 Hz.
  • the frequency at which the acceleration becomes maximum is the natural frequency f0.
  • a Sin wave having the lowest resonance frequency f0 of mechanical vibration is continuously loaded, and it is confirmed that there is no characteristic change or destruction. Measurement is performed with an applied voltage of 0.35 V and a weight of 80 g. At this time, the weight to be loaded varies depending on the model.
  • the change of the natural frequency f0 after 168 hours is 1 Hz, which is a slight change of 0.6% compared to before the test.
  • the frequency is similarly 5 Hz, which is greatly changed by 3% compared to before the test.
  • Embodiment 1 of the present invention there is little fluctuation in the natural frequency f0 even during continuous operation.
  • the mechanical vibration can continue to be stable over a long period of time.
  • each part structure of this invention is not restricted to the said embodiment, A various deformation
  • transformation is possible within the technical scope as described in a claim, and is not limited to the embodiment mentioned above.

Abstract

Lors du fonctionnement en continu d'un transducteur électroacoustique comportant une fonction de vibration, apparaissaient des altérations telles un changement de la fréquence propre (f0) de la vibration mécanique, et se posaient des problèmes tels une altération des vibrations mécaniques ainsi qu'une perte de fiabilité. Selon l'invention, un transducteur électroacoustique comportant une fonction de vibration est équipé: d'un cadre; d'une membrane fixée sur ledit cadre; d'une bobine acoustique fixée sur le côté inférieur de ladite membrane; et d'une suspension qui tout en étant fixée sur le cadre, maintient en permettant un mouvement vertical une partie circuit magnétique. Ladite suspension est caractéristique en ce qu'elle est fixée sur le cadre par l'intermédiaire d'un élément d'amortissement.
PCT/JP2010/060203 2009-07-29 2010-06-16 Transducteur électroacoustique comportant une fonction de vibration WO2011013462A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-176368 2009-07-29
JP2009176368 2009-07-29

Publications (1)

Publication Number Publication Date
WO2011013462A1 true WO2011013462A1 (fr) 2011-02-03

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ID=43529127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/060203 WO2011013462A1 (fr) 2009-07-29 2010-06-16 Transducteur électroacoustique comportant une fonction de vibration

Country Status (1)

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WO (1) WO2011013462A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11192455A (ja) * 1997-10-30 1999-07-21 Matsushita Electric Ind Co Ltd 電気−機械−音響変換器及びその製造法
JP2001259525A (ja) * 2000-03-23 2001-09-25 Namiki Precision Jewel Co Ltd 電磁誘導型アクチュエータ装置
JP2003198680A (ja) * 2001-12-28 2003-07-11 Nec Tokin Corp 移動体通信機器と多機能振動アクチュエータの搭載方法
JP2005269497A (ja) * 2004-03-22 2005-09-29 Namiki Precision Jewel Co Ltd 多機能型振動アクチュエータ及び携帯端末機器
JP2006325198A (ja) * 2005-04-19 2006-11-30 Citizen Electronics Co Ltd 電磁エキサイタ
JP2007175570A (ja) * 2005-12-27 2007-07-12 Namiki Precision Jewel Co Ltd 多機能型振動アクチュエータ
WO2008093728A1 (fr) * 2007-02-02 2008-08-07 Namiki Seimitsu Houseki Kabushikikaisha Actionneur oscillant multifonction
JP2008244710A (ja) * 2007-03-27 2008-10-09 Citizen Electronics Co Ltd 電気音響変換器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11192455A (ja) * 1997-10-30 1999-07-21 Matsushita Electric Ind Co Ltd 電気−機械−音響変換器及びその製造法
JP2001259525A (ja) * 2000-03-23 2001-09-25 Namiki Precision Jewel Co Ltd 電磁誘導型アクチュエータ装置
JP2003198680A (ja) * 2001-12-28 2003-07-11 Nec Tokin Corp 移動体通信機器と多機能振動アクチュエータの搭載方法
JP2005269497A (ja) * 2004-03-22 2005-09-29 Namiki Precision Jewel Co Ltd 多機能型振動アクチュエータ及び携帯端末機器
JP2006325198A (ja) * 2005-04-19 2006-11-30 Citizen Electronics Co Ltd 電磁エキサイタ
JP2007175570A (ja) * 2005-12-27 2007-07-12 Namiki Precision Jewel Co Ltd 多機能型振動アクチュエータ
WO2008093728A1 (fr) * 2007-02-02 2008-08-07 Namiki Seimitsu Houseki Kabushikikaisha Actionneur oscillant multifonction
JP2008244710A (ja) * 2007-03-27 2008-10-09 Citizen Electronics Co Ltd 電気音響変換器

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