WO2014073448A1 - Suspension structure of multifunctional vibration actuator - Google Patents
Suspension structure of multifunctional vibration actuator Download PDFInfo
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- WO2014073448A1 WO2014073448A1 PCT/JP2013/079573 JP2013079573W WO2014073448A1 WO 2014073448 A1 WO2014073448 A1 WO 2014073448A1 JP 2013079573 W JP2013079573 W JP 2013079573W WO 2014073448 A1 WO2014073448 A1 WO 2014073448A1
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- suspension
- vibration actuator
- magnetic circuit
- arms
- suspensions
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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
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/027—Electrical or mechanical reduction of yoke vibration
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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
- H04R2400/00—Loudspeakers
- H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
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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
- H04R2400/00—Loudspeakers
- H04R2400/07—Suspension between moving magnetic core and housing
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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
Definitions
- the present invention comprises a sound reproducing unit by attaching a diaphragm provided with a voice coil to a housing, and a magnetic circuit unit having a magnet and a yoke is supported in the housing by a suspension having two arms.
- the present invention relates to a multi-function vibration actuator having a dynamic structure in which the voice coil is disposed in a magnetic gap formed by the magnetic circuit unit.
- Cited Document 1 Japanese Patent Application Laid-Open No. 2007-275776
- Cited Reference 2 there is a multi-function vibration actuator described in Patent 4939300 (hereinafter referred to as Cited Reference 2) that has been provided with a sound reproduction function using the same dynamic structure. It provides a structure that can respond to impacts.
- the structure described in the cited document 2 uses the same suspension as the structure described in the cited document 1 for supporting the magnetic circuit unit. For this reason, when miniaturizing components that have been required in recent years, it is difficult to maintain the processing accuracy of the suspension, and it is difficult to stabilize the magnetic circuit unit during sound reproduction in which only the diaphragm is resonated. . This is because, unlike the structure described in the cited document 1, the voice coil described in the cited document 2 is fixed to the diaphragm on the premise that it vibrates.
- the multi-function vibration actuator described in the present application is a multi-function vibration actuator having a two-suspension structure with two arms, which improves the stability of the magnetic circuit section and reduces the size.
- Another object of the present invention is to provide a multifunctional vibration actuator that can obtain good sound quality and vibration characteristics.
- the first aspect of the present invention uses a structure in which the arms of the suspension are different from each other in the multi-function vibration actuator having the two-arm suspension structure with two arms.
- the technical feature is that the arm shape of the first suspension and the arm shape of the second suspension are different from each other.
- the multi-function vibration actuator is technically characterized in that the directions of the arms between the suspensions are different from each other.
- the multi-function vibration actuator according to the first aspect of the present invention has a two-arm suspension with two arms while maintaining the sound quality when the sound reproducing unit is driven even when downsized.
- the stability of the magnetic circuit portion due to the structure can be improved. More specifically, by making the shapes of the arms related to the two suspensions different from each other, each suspension can be functioned in a form suitable for each fixed position. In other words, it is possible to maintain the voice coil diameter for the suspension on the voice coil side, and to support the magnetic circuit unit stably on the suspension on the bottom side of the magnetic circuit unit. The voice coil diameter is maintained along with the development, and the magnetic circuit section can be stabilized.
- this multi-function vibration actuator secures the arm length by using two arms for the outer dimensions that are reduced in size as the size is reduced, and improves the durability against fatigue failure.
- the arm length is shortened and the amplitude is reduced due to the reduction in the diameter of the suspension with three arms, and the stability is due to the number of suspension arms with two arms.
- the structure is suitable for miniaturization and diameter reduction.
- the shape of the suspension is simplified, and it is possible to maintain the mass productivity and processing accuracy of the suspension even when the diameter is reduced.
- the two suspensions described above can suppress the vibration that occurs when an impact from the side is applied, the effect of improving the impact resistance provided by the structure described in the cited document 2 is improved. It can be obtained by the support structure of the part.
- the behavior of the magnetic circuit section can be further stabilized with respect to the above effect. More specifically, with the structure in which the magnetic circuit unit is sandwiched between the two suspensions, the displacement and force directions in the two suspensions are aligned with respect to suspension competition that occurs when the magnetic circuit unit is driven. This makes it possible to eliminate the torsional moment generated in the magnetic circuit part due to the competition during the driving.
- the perspective view of the multifunctional vibration actuator used in the embodiment of the present invention is a cross-sectional side view taken along line A-A ′ of the multi-function vibration actuator shown in FIG. 1. Plan view of the suspension shown in FIG.
- FIG. 1 is an overall perspective view of a multi-function vibration actuator used in the first embodiment of the present invention
- FIG. 2 is an exploded perspective view
- FIG. 3 is a side sectional view taken along line AA 'in
- FIG. 4 and FIG. 4 are plan views of the suspension shown in FIG.
- the multi-function vibration actuator used in the present embodiment comprises a sound reproducing unit by a diaphragm 2 to which a voice coil 3 is attached, and a magnet 6 and a yoke made of a magnetic material. 7.
- a magnetic circuit unit is configured by the pole piece 5 and the voice circuit 3 is fixed in the magnetic gap g of the magnetic circuit unit by fixing the magnetic circuit unit in the cover 11 via two suspensions 4 and 10 having different arm shapes.
- the weight 9 uses a mounting structure in which the weight 9 is provided on the outer periphery of the yoke 7 of the magnetic circuit portion via the weight case 8.
- the drive structure of the multi-function vibration actuator in the present embodiment vibrates the sound reproducing unit and the magnetic circuit unit by an input signal to the voice coil 3. That is, by setting the input signal in a frequency band near the resonance frequency of the sound reproduction unit, the sound reproduction due to the vibration of the diaphragm 2 is set in a frequency band near the resonance frequency of the magnetic circuit unit, thereby causing the vibration of the magnetic circuit unit.
- Each sensory vibration output is possible.
- by using these synthesized waveforms as input signals it is possible to simultaneously output sound reproduction and bodily sensation vibration output.
- the upper suspension 4 provided on the diaphragm side and the lower suspension 10 provided on the bottom surface side of the magnetic circuit are the same two-arm suspension, but the thicknesses of the arms r1 and r2 are changed. It has a shape.
- the multi-function vibration actuator described in the present embodiment has the effect of improving the stability of the magnetic circuit unit while maintaining the sound quality of the sound reproduction unit at the time of sound reproduction by the frequency band and occurrence of body vibration. I was able to get it.
- This effect is an effect that only a multifunctional vibration actuator that performs sound reproduction and generation of sensation vibration has, in contrast to a vibration actuator that generates only sensation vibration.
- the upper suspension 4 increases the diameter of the voice coil serving as a driving source and thereby
- the lower suspension 10 provides the effect of reducing the overall diameter while enabling improvement in sound quality and vibration characteristics, and improvement in durability and stability, respectively.
- the spring characteristics of both suspensions are set close to each other depending on the arm shape and the arm length, and together with the effect of the suspensions 4 and 10, the amplitude maintenance of the magnetic circuit portion inside the cover 11 is referred to. An effect was also obtained.
- the upper suspension 4 and the lower suspension 10 have a structure in which two arms are provided and a three-dimensional shape is used. For this reason, it was possible to suppress the vibration of the magnetic circuit section against the impact in the lateral direction due to dropping or the like while suppressing the installation space of the suspension which is increased by using two suspensions.
- the number of arms is two, the arm length can be secured even when the size is reduced, and the suspension can be prevented from being broken due to fatigue.
- the two suspensions are arranged such that the extending directions of the arms r1 and r2 are opposite to each other, thereby eliminating the competition between the two suspensions caused by the above three-dimensional shape.
- a structure in which the weight 9 is attached to the yoke 7 via the weight case 8 is used. Therefore, it is possible to flatten the frequency characteristics while using a high specific gravity material with low workability such as tungsten as the material of the weight 9. More specifically, the distance t between the outer circumference of the magnetic circuit section and the inner wall of the cover is limited, and it is necessary for the outer circumference of the magnetic circuit section to flatten the frequency characteristics by using air above and below the magnetic circuit section as a damper. By supplementing the dimensional accuracy of the weight case 8 with the weight case 8, it is possible to provide the effects of using the high specific gravity material and flattening the frequency characteristics.
Abstract
[Problem] To provide a multifunctional vibration actuator that is capable of achieving a good sound quality and vibration characteristics even when the size and diameter thereof are reduced. [Solution] A structure comprising two two-armed suspensions, by which amplitude and durability can be ensured even when the diameter is reduced, is utilized, and the shapes of the suspensions are formed different from each other in order to secure the diameter of a voice coil serving as a driving source. Consequently, a multifunctional vibration actuator that not only stabilizes behaviors of a magnetic circuit part but also improves acoustic characteristics can be provided.
Description
本発明は、ボイスコイルを設けたダイアフラムをハウジングに取り付けることで音響再生部を構成し、２本のアームを有するサスペンションによってマグネットとヨークとを有する磁気回路部を前記ハウジング内に支持することで、前記ボイスコイルを前記磁気回路部が形成する磁気空隙に配置したダイナミック構造の多機能型振動アクチュエータに関する。
The present invention comprises a sound reproducing unit by attaching a diaphragm provided with a voice coil to a housing, and a magnetic circuit unit having a magnet and a yoke is supported in the housing by a suspension having two arms. The present invention relates to a multi-function vibration actuator having a dynamic structure in which the voice coil is disposed in a magnetic gap formed by the magnetic circuit unit.
現在、携帯電話に代表される移動体通信機器には振動アクチュエータが一部の機種に搭載されており、使用者に対して、マナーモードとして着信を振動によって知らせる事が可能となっている。この様な振動アクチュエータのうち代表的なものとしては、特開２００７－２７５７７６（以下引用文献１として記載）に記載されたダイナミック構造の振動アクチュエータが挙げられる。引用文献１記載の構造は、サスペンションの固定構造を技術的特徴としており、ボイスコイルの上側にサスペンション固定部を設ける事によってサスペンションの有効長を最大にすることを可能としている。
Currently, some mobile communication devices represented by mobile phones are equipped with vibration actuators in some models, and it is possible to notify the user of incoming calls by vibration in the manner mode. A typical example of such a vibration actuator is a vibration actuator having a dynamic structure described in Japanese Patent Application Laid-Open No. 2007-275776 (hereinafter referred to as Cited Document 1). The structure described in the cited document 1 has a technical feature of a suspension fixing structure, and it is possible to maximize the effective length of the suspension by providing a suspension fixing portion on the upper side of the voice coil.
また、同じダイナミック構造を用いて音響再生機能を付与したものとしては特許４９３９３００（以下引用文献２として記載）に記載された多機能型振動アクチュエータがあり、ストッパー部を改良することによって多方向からの衝撃に対応できる構造を提供している。
In addition, there is a multi-function vibration actuator described in Patent 4939300 (hereinafter referred to as Cited Reference 2) that has been provided with a sound reproduction function using the same dynamic structure. It provides a structure that can respond to impacts.
上述した利点を有している一方で、引用文献２に記載の構造は、磁気回路部を支持するサスペンションの構造が引用文献１記載の構造と同じものを用いている。この為、近年要求されている部品の小型化に際して、サスペンションの加工精度を保つことができず、ダイアフラムのみを共振させる音響再生時に、磁気回路部を安定させることが難しいという課題を有している。これは、引用文献１記載の構造とは異なり、引用文献２に記載のボイスコイルが、振動することを前提としたダイアフラムに固定されていることに起因している。
While having the above-described advantages, the structure described in the cited document 2 uses the same suspension as the structure described in the cited document 1 for supporting the magnetic circuit unit. For this reason, when miniaturizing components that have been required in recent years, it is difficult to maintain the processing accuracy of the suspension, and it is difficult to stabilize the magnetic circuit unit during sound reproduction in which only the diaphragm is resonated. . This is because, unlike the structure described in the cited document 1, the voice coil described in the cited document 2 is fixed to the diaphragm on the premise that it vibrates.
上記課題を解決するために本願記載の多機能型振動アクチュエータは、アームを２本とした２枚サスペンション構造の多機能型振動アクチュエータに於いて、磁気回路部の安定性を向上し、小型化に際しても良好な音質及び振動特性を得ることの出来る多機能型振動アクチュエータを提供することを目的としている。
In order to solve the above problems, the multi-function vibration actuator described in the present application is a multi-function vibration actuator having a two-suspension structure with two arms, which improves the stability of the magnetic circuit section and reduces the size. Another object of the present invention is to provide a multifunctional vibration actuator that can obtain good sound quality and vibration characteristics.
上記目的のために本発明に於ける第１の態様では、アームを２本とした２枚サスペンション構造の多機能型振動アクチュエータに於いて、サスペンションのアームを互いに異なる形状とした構造を用いている。より具体的には、第１のサスペンションのアーム形状と第２のサスペンションのアーム形状が互いに異なる構造としたことをその技術的特徴としている。
For the above purpose, the first aspect of the present invention uses a structure in which the arms of the suspension are different from each other in the multi-function vibration actuator having the two-arm suspension structure with two arms. . More specifically, the technical feature is that the arm shape of the first suspension and the arm shape of the second suspension are different from each other.
また、本発明第２の態様では、前記多機能型振動アクチュエータについて、各サスペンション間に於けるアームの向きを互いに異なる方向として配置した事を技術的特徴としている。
In the second aspect of the present invention, the multi-function vibration actuator is technically characterized in that the directions of the arms between the suspensions are different from each other.
In the second aspect of the present invention, the multi-function vibration actuator is technically characterized in that the directions of the arms between the suspensions are different from each other.
この様な構造を用いたことで本発明第１の態様記載の多機能型振動アクチュエータは、小型化に際しても音響再生部を駆動した際の音質を保ちつつ、アームを２本とした２枚サスペンション構造による磁気回路部の安定性を向上することができる。より具体的には、２枚のサスペンションに関わるアーム形状を互いに異なった形状とすることで、各サスペンションについて、それぞれの固定位置に適した形で機能させることが可能となる。即ち、ボイスコイル側のサスペンションではボイスコイル径の維持を、磁気回路部底面側のサスペンションでは磁気回路部の安定支持を、といった異なる２つの用途に対応したアーム形状とすることで、全体的な小型化と共にボイスコイル径を維持し、磁気回路部を安定させる事を可能としている。
By using such a structure, the multi-function vibration actuator according to the first aspect of the present invention has a two-arm suspension with two arms while maintaining the sound quality when the sound reproducing unit is driven even when downsized. The stability of the magnetic circuit portion due to the structure can be improved. More specifically, by making the shapes of the arms related to the two suspensions different from each other, each suspension can be functioned in a form suitable for each fixed position. In other words, it is possible to maintain the voice coil diameter for the suspension on the voice coil side, and to support the magnetic circuit unit stably on the suspension on the bottom side of the magnetic circuit unit. The voice coil diameter is maintained along with the development, and the magnetic circuit section can be stabilized.
更に、本多機能型振動アクチュエータは、小型化に伴い小径化する外形寸法に対して、アームを２本とすることでアーム長を確保し、疲労破壊に対する耐久性を向上している。加えて、小型化によってサスペンションが抱える課題に関して、アームを３本としたサスペンションの小径化に伴うアーム長の短縮及びそれによる振幅の減少と、アームを２本としたサスペンションのアーム本数に起因する安定性の低下を解消し、小型、小径化に適した構造となっている。また、当該アーム２本構造としたことでサスペンション形状を簡略化しており、小径化してもサスペンションの量産性と加工精度を保つ事が可能となった。
Furthermore, this multi-function vibration actuator secures the arm length by using two arms for the outer dimensions that are reduced in size as the size is reduced, and improves the durability against fatigue failure. In addition, with regard to the problems facing suspension due to downsizing, the arm length is shortened and the amplitude is reduced due to the reduction in the diameter of the suspension with three arms, and the stability is due to the number of suspension arms with two arms. The structure is suitable for miniaturization and diameter reduction. In addition, since the structure of the two arms is simplified, the shape of the suspension is simplified, and it is possible to maintain the mass productivity and processing accuracy of the suspension even when the diameter is reduced.
また、上記サスペンションを２枚としたことによって横からの衝撃が加わった時に生じる揺れを抑えることが出来る為、引用文献２に記載の構造によって付与されていた耐衝撃性の向上という効果を磁気回路部の支持構造によって得ることができる。
Further, since the two suspensions described above can suppress the vibration that occurs when an impact from the side is applied, the effect of improving the impact resistance provided by the structure described in the cited document 2 is improved. It can be obtained by the support structure of the part.
また、本発明第２の態様記載の構造を用いることで、上記効果に対して磁気回路部の挙動を更に安定させることができる。より具体的には、２枚のサスペンションを用いて磁気回路部を挟んだ構造としていることによって磁気回路部の駆動時に生じるサスペンションの競り合いについて、２枚のサスペンションに於ける変位と力の方向を揃えることによって、前記駆動時、前記競り合いによって磁気回路部に生じる捻れモーメントの解消を可能としている。
Moreover, by using the structure described in the second aspect of the present invention, the behavior of the magnetic circuit section can be further stabilized with respect to the above effect. More specifically, with the structure in which the magnetic circuit unit is sandwiched between the two suspensions, the displacement and force directions in the two suspensions are aligned with respect to suspension competition that occurs when the magnetic circuit unit is driven. This makes it possible to eliminate the torsional moment generated in the magnetic circuit part due to the competition during the driving.
以上述べたように、本願請求項記載の構造を用いることによって小型化に際しても良好な音質及び振動特性を得ることの出来る多機能型振動アクチュエータを提供することができる。
As described above, by using the structure described in the claims of the present application, it is possible to provide a multifunction vibration actuator capable of obtaining good sound quality and vibration characteristics even when downsized.
As described above, by using the structure described in the claims of the present application, it is possible to provide a multifunction vibration actuator capable of obtaining good sound quality and vibration characteristics even when downsized.
以下に、図１、図２、図３及び図４を用いて、本発明に於ける最良の実施形態を示す。尚、図中の記号及び部品番号について、同じ部品として機能するものには共通の記号又は番号を付与している。
Hereinafter, the best embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 3 and FIG. In addition, about the symbol and component number in a figure, the common symbol or number is provided to what functions as the same component.
図１に本発明に於ける第１の実施例にて用いる多機能型振動アクチュエータの全体斜視図を、図２に分解斜視図を、図３に図１中Ａ－Ａ’に於ける側断面図を、そして図４に図２中に示したサスペンションの平面図をそれぞれ示す。
FIG. 1 is an overall perspective view of a multi-function vibration actuator used in the first embodiment of the present invention, FIG. 2 is an exploded perspective view, and FIG. 3 is a side sectional view taken along line AA 'in FIG. FIG. 4 and FIG. 4 are plan views of the suspension shown in FIG.
図１、図２及び図３から解るように、本実施形態で用いる多機能型振動アクチュエータは、ボイスコイル３を取りつけたダイアフラム２によって音響再生部を構成し、マグネット６及び、磁性体からなるヨーク７、ポールピース５によって磁気回路部を構成し、アーム形状の異なる二つのサスペンション４、１０を介してカバー１１内に当該磁気回路部を固定することで磁気回路部の磁気空隙ｇにボイスコイル３を配置したダイナミック構造となっている。また、分銅９について、磁気回路部のヨーク７外周に分銅ケース８を介して分銅９を設けた取付構造を用いている。ここで、本実施形態に於ける多機能型振動アクチュエータの駆動構造はボイスコイル３への入力信号によって前記音響再生部と磁気回路部とを振動させるものとなっている。即ち、入力信号を音響再生部の共振周波数付近の周波数帯域に設定することでダイアフラム２の振動による音響再生を、磁気回路部の共振周波数付近の周波数帯域に設定することで磁気回路部の振動による体感振動出力を、それぞれ可能としている。加えて、これらの合成波形を入力信号として用いることで、音響再生と体感振動出力とを同時に出力することが、可能となっている。
As can be seen from FIGS. 1, 2 and 3, the multi-function vibration actuator used in the present embodiment comprises a sound reproducing unit by a diaphragm 2 to which a voice coil 3 is attached, and a magnet 6 and a yoke made of a magnetic material. 7. A magnetic circuit unit is configured by the pole piece 5 and the voice circuit 3 is fixed in the magnetic gap g of the magnetic circuit unit by fixing the magnetic circuit unit in the cover 11 via two suspensions 4 and 10 having different arm shapes. It has a dynamic structure with Further, the weight 9 uses a mounting structure in which the weight 9 is provided on the outer periphery of the yoke 7 of the magnetic circuit portion via the weight case 8. Here, the drive structure of the multi-function vibration actuator in the present embodiment vibrates the sound reproducing unit and the magnetic circuit unit by an input signal to the voice coil 3. That is, by setting the input signal in a frequency band near the resonance frequency of the sound reproduction unit, the sound reproduction due to the vibration of the diaphragm 2 is set in a frequency band near the resonance frequency of the magnetic circuit unit, thereby causing the vibration of the magnetic circuit unit. Each sensory vibration output is possible. In addition, by using these synthesized waveforms as input signals, it is possible to simultaneously output sound reproduction and bodily sensation vibration output.
また、図４から解るように、ダイアフラム側に設ける上側サスペンション４と磁気回路底面側に設ける下側サスペンション１０とは同じ２本アーム型のサスペンションでありながら、アームｒ１及びｒ２の太さを変えた形状としている。この為、本実施形態記載の多機能型振動アクチュエータは、前記周波数帯域による音響再生時及び体感振動の発生時に於いて、音響再生部の音質を保ちつつ磁気回路部の安定性の向上という効果を得ることができた。この効果は、体感振動のみを発生する振動アクチュエータに対して、音響再生と体感振動の発生とを行う多機能型振動アクチュエータのみが有する効果となっている。より具体的には、ダイアフラム側に設けた上側サスペンション４とヨーク底面側に設けた下側サスペンション１０とでアーム形状を変えることで、上側サスペンション４は駆動源となるボイスコイル径の拡大とそれによる音質及び振動特性の向上を、下側サスペンション１０は耐久性と安定性の向上を、それぞれ可能にしつつ、全体の小径化という効果を付与している。尚、本実施形態に於いて両サスペンションのバネ特性はアーム形状及びアーム長によって近しく設定しており、前記両サスペンション４、１０による効果と共に、カバー１１内部に於ける磁気回路部の振幅維持という効果をも得ることができた。
As can be seen from FIG. 4, the upper suspension 4 provided on the diaphragm side and the lower suspension 10 provided on the bottom surface side of the magnetic circuit are the same two-arm suspension, but the thicknesses of the arms r1 and r2 are changed. It has a shape. For this reason, the multi-function vibration actuator described in the present embodiment has the effect of improving the stability of the magnetic circuit unit while maintaining the sound quality of the sound reproduction unit at the time of sound reproduction by the frequency band and occurrence of body vibration. I was able to get it. This effect is an effect that only a multifunctional vibration actuator that performs sound reproduction and generation of sensation vibration has, in contrast to a vibration actuator that generates only sensation vibration. More specifically, by changing the arm shape between the upper suspension 4 provided on the diaphragm side and the lower suspension 10 provided on the bottom surface side of the yoke, the upper suspension 4 increases the diameter of the voice coil serving as a driving source and thereby The lower suspension 10 provides the effect of reducing the overall diameter while enabling improvement in sound quality and vibration characteristics, and improvement in durability and stability, respectively. In this embodiment, the spring characteristics of both suspensions are set close to each other depending on the arm shape and the arm length, and together with the effect of the suspensions 4 and 10, the amplitude maintenance of the magnetic circuit portion inside the cover 11 is referred to. An effect was also obtained.
また、図２及び図３から解るように、本実施形態では上側サスペンション４及び下側サスペンション１０について、アームを２本とした上で立体的な形状とした構造を用いている。この為、サスペンションを２枚としたことによって増加するサスペンションの設置スペースを抑えつつ、落下等による横方向の衝撃に対して磁気回路部の揺れを抑えることができた。また、アームを２本としたことで小型化に際してもアーム長を確保し、疲労によって生じるサスペンションの破壊を防ぐことが可能となった。加えて、本実施形態では両サスペンションの配置について、アームｒ１、ｒ２の伸長方向が互いに反対方向となるように配置することで、上記立体的な形状としたことによって生じる両サスペンション同士の競り合いを解消することが可能となった。これは、両サスペンションに於けるアームｒ１、ｒ２の挙動がその配置上、それぞれ伸縮が逆方向に作用する事を利用したもので、本実施形態ではアームの伸長方向を反対方向とすることによって磁気回路部に働く回転モーメントを揃え、前記競り合いの解消とそれによる耐久性の向上という効果を得ている。
Further, as can be seen from FIGS. 2 and 3, in the present embodiment, the upper suspension 4 and the lower suspension 10 have a structure in which two arms are provided and a three-dimensional shape is used. For this reason, it was possible to suppress the vibration of the magnetic circuit section against the impact in the lateral direction due to dropping or the like while suppressing the installation space of the suspension which is increased by using two suspensions. In addition, since the number of arms is two, the arm length can be secured even when the size is reduced, and the suspension can be prevented from being broken due to fatigue. In addition, in this embodiment, the two suspensions are arranged such that the extending directions of the arms r1 and r2 are opposite to each other, thereby eliminating the competition between the two suspensions caused by the above three-dimensional shape. It became possible to do. This is because the behavior of the arms r1 and r2 in both suspensions utilizes the fact that the expansion and contraction acts in the opposite direction, and in this embodiment, the arm extension direction is reversed. The rotational moment acting on the circuit portion is aligned, and the effect of eliminating the competition and improving the durability is obtained.
また、図３から解るように、本実施形態では分銅９について、分銅ケース８を介してヨーク７に取りつけた構造を用いている。この為、分銅９の材料としてタングステンといった加工性の低い高比重材料を使用しつつ、周波数特性を平坦にすることが可能となった。より具体的には、磁気回路部外周－カバー内壁間の距離ｔを制限し、磁気回路部の上下に於ける空気をダンパとして用いた事による周波数特性の平坦化に際して、磁気回路部の外周に必要とされる寸法精度を分銅ケース８によって補うことで、前記高比重材料の使用と周波数特性の平坦化という効果を付与することが出来る。
Further, as can be seen from FIG. 3, in this embodiment, a structure in which the weight 9 is attached to the yoke 7 via the weight case 8 is used. Therefore, it is possible to flatten the frequency characteristics while using a high specific gravity material with low workability such as tungsten as the material of the weight 9. More specifically, the distance t between the outer circumference of the magnetic circuit section and the inner wall of the cover is limited, and it is necessary for the outer circumference of the magnetic circuit section to flatten the frequency characteristics by using air above and below the magnetic circuit section as a damper. By supplementing the dimensional accuracy of the weight case 8 with the weight case 8, it is possible to provide the effects of using the high specific gravity material and flattening the frequency characteristics.
以上述べたように、本願請求項記載の構造を用いることによって小型化に際しても良好な音質及び振動特性を得ることの出来る多機能型振動アクチュエータを提供することができた。
As described above, by using the structure described in the claims of the present application, it is possible to provide a multi-function vibration actuator capable of obtaining good sound quality and vibration characteristics even when miniaturized.
As described above, by using the structure described in the claims of the present application, it is possible to provide a multi-function vibration actuator capable of obtaining good sound quality and vibration characteristics even when miniaturized.
１ ハウジング
２ ダイアフラム
３ ボイスコイル
４ 上側サスペンション
５ ポールピース
６ マグネット
７ ヨーク
８ 分銅ケース
９ 分銅
１０ 下側サスペンション
１１ カバー
１２ 端子台
ｇ 磁気空隙
ｔ 磁気回路部外周－カバー内壁間距離
ｒ１ 上側サスペンションアーム
ｒ２ 下側サスペンションアーム DESCRIPTION OFSYMBOLS 1 Housing 2 Diaphragm 3 Voice coil 4 Upper suspension 5 Pole piece 6 Magnet 7 Yoke 8 Weight case 9 Weight 10 Lower suspension 11 Cover 12 Terminal block g Magnetic gap t Distance between magnetic circuit part outer periphery and cover inner wall r1 Upper suspension arm r2 Lower Side suspension arm
２ ダイアフラム
３ ボイスコイル
４ 上側サスペンション
５ ポールピース
６ マグネット
７ ヨーク
８ 分銅ケース
９ 分銅
１０ 下側サスペンション
１１ カバー
１２ 端子台
ｇ 磁気空隙
ｔ 磁気回路部外周－カバー内壁間距離
ｒ１ 上側サスペンションアーム
ｒ２ 下側サスペンションアーム DESCRIPTION OF
Claims (2)
- ボイスコイルを設けたダイアフラムからなる音響再生部と、
マグネットを設けたヨークを有する磁気回路部とを備え、
前記音響再生部を固定したハウジングに対し、
前記磁気回路部を挟んで配置した２枚のサスペンションを介して当該磁気回路部を支持した多機能型振動アクチュエータであって、
前記サスペンションのアームを２本で構成し、
前記サスペンションのアームを互いに異なる形状とした多機能型振動アクチュエータ。
An acoustic reproduction unit comprising a diaphragm provided with a voice coil;
A magnetic circuit section having a yoke provided with a magnet,
For the housing to which the sound reproducing unit is fixed,
A multi-function vibration actuator that supports the magnetic circuit unit via two suspensions arranged with the magnetic circuit unit interposed therebetween,
The suspension arm is composed of two arms,
A multifunctional vibration actuator in which the arms of the suspension have different shapes.
- 前記各サスペンション間に於けるアームの向きを互いに異なる方向として配置した請求項１記載の多機能型振動アクチュエータ。 The multi-function vibration actuator according to claim 1, wherein the directions of the arms between the suspensions are different from each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012247536A JP2014096724A (en) | 2012-11-09 | 2012-11-09 | Suspension structure of multi-functional vibration actuator |
| JP2012-247536 | 2012-11-09 |
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| Publication Number | Publication Date |
|---|---|
| WO2014073448A1 true WO2014073448A1 (en) | 2014-05-15 |
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| PCT/JP2013/079573 WO2014073448A1 (en) | 2012-11-09 | 2013-10-31 | Suspension structure of multifunctional vibration actuator |
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| JP (1) | JP2014096724A (en) |
| WO (1) | WO2014073448A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112243185A (en) * | 2019-07-17 | 2021-01-19 | 奥音科技（北京）有限公司 | Electromagnetic actuator and output device |
| US11678123B2 (en) | 2020-05-20 | 2023-06-13 | Sound Solutions International Co., Ltd. | Electromagnetic actuator for a speaker or a sound transducer with a high-strength metal connection between the voice coil and the magnet system |
| US11838736B2 (en) | 2020-05-20 | 2023-12-05 | Sound Solutions International Co., Ltd. | Electromagnetic actuator for a speaker or a sound transducer with a multimetal layer connection between the voice coil and the magnet system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002361174A (en) * | 2001-06-11 | 2002-12-17 | Namiki Precision Jewel Co Ltd | Vibration actuator device |
| JP2007222822A (en) * | 2006-02-24 | 2007-09-06 | Citizen Electronics Co Ltd | Vibrator and its assembling method |
-
2012
- 2012-11-09 JP JP2012247536A patent/JP2014096724A/en active Pending
-
2013
- 2013-10-31 WO PCT/JP2013/079573 patent/WO2014073448A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002361174A (en) * | 2001-06-11 | 2002-12-17 | Namiki Precision Jewel Co Ltd | Vibration actuator device |
| JP2007222822A (en) * | 2006-02-24 | 2007-09-06 | Citizen Electronics Co Ltd | Vibrator and its assembling method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112243185A (en) * | 2019-07-17 | 2021-01-19 | 奥音科技（北京）有限公司 | Electromagnetic actuator and output device |
| US11341948B2 (en) | 2019-07-17 | 2022-05-24 | Sound Solutions International Co., Ltd. | Electromagnetic actuator with improved spring arrangement |
| US11948549B2 (en) | 2019-07-17 | 2024-04-02 | Sound Solutions International Co., Ltd. | Electromagnetic actuator for a display with improved spring arrangement and output device with said actuator |
| US11678123B2 (en) | 2020-05-20 | 2023-06-13 | Sound Solutions International Co., Ltd. | Electromagnetic actuator for a speaker or a sound transducer with a high-strength metal connection between the voice coil and the magnet system |
| US11838736B2 (en) | 2020-05-20 | 2023-12-05 | Sound Solutions International Co., Ltd. | Electromagnetic actuator for a speaker or a sound transducer with a multimetal layer connection between the voice coil and the magnet system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014096724A (en) | 2014-05-22 |
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