WO2014163047A1 - Thinning-down of multifunction-type vibration actuator - Google Patents

Thinning-down of multifunction-type vibration actuator Download PDF

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Publication number
WO2014163047A1
WO2014163047A1 PCT/JP2014/059518 JP2014059518W WO2014163047A1 WO 2014163047 A1 WO2014163047 A1 WO 2014163047A1 JP 2014059518 W JP2014059518 W JP 2014059518W WO 2014163047 A1 WO2014163047 A1 WO 2014163047A1
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Prior art keywords
vibration
housing
magnetic circuit
vibration actuator
function
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PCT/JP2014/059518
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French (fr)
Japanese (ja)
Inventor
優一 橋本
大橋　清
陽介 橋本
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並木精密宝石株式会社
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Publication of WO2014163047A1 publication Critical patent/WO2014163047A1/en

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/02—Loudspeakers
    • 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
    • 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

Definitions

  • the present invention relates to a multi-function vibration actuator having a dynamic structure capable of performing sensory vibration and sound reproduction by vibrating a target object to be pasted and capable of outputting sensory vibration even when a magnetic circuit unit itself vibrates.
  • mobile communication devices represented by mobile phones are mainly multi-function mobile phones that have enhanced data communication functions and can play music and videos apart from communication functions such as telephone calls.
  • priority is given to the enlargement of the screen as compared with other elements. Therefore, the sound generation function for incoming calls and the like is disclosed in Japanese Patent No. 3949273 (hereinafter referred to as Patent Document 1) and Japanese Patent Application Laid-Open No. 2009-195799 (hereinafter referred to as Japanese Unexamined Patent Application Publication No. 2009-195799).
  • Patent Document 1 Japanese Patent No. 3949273
  • Japanese Patent Application Laid-Open No. 2009-195799 hereinafter referred to as Japanese Unexamined Patent Application Publication No. 2009-195799
  • a method of performing sound reproduction by vibrating a housing by a vibration generator such as described in Patent Document 2 is used.
  • the structure described in Patent Document 1 is characterized in that a vibration generator is embedded in the diaphragm, and a sub-panel for transmitting vibration from the voice coil is installed on the inner wall of the embedded portion in the diaphragm.
  • the structure described in Patent Document 2 includes a sound reproducing function in which a sticking surface is a diaphragm by vibration of a voice coil, and a sensory vibration generating function by vibration of a magnetic circuit unit supported through a suspension.
  • the technical feature of the suspension is optimization of frequency characteristics using an auxiliary suspension.
  • the vibration generating device described in Patent Document 1 does not have a function to generate a sensory vibration due to its structure, so that a sensory vibration such as a vibration motor is separately provided when mounted on a multi-function mobile phone. There is a problem that an actuator must be provided.
  • the amount of vibration at the time of experiencing vibration is limited by housing the magnetic circuit portion and the suspension in the housing.
  • the structure described in Patent Document 1 that requires a separate sensory vibration device and the structure described in Patent Document 2 in which the amount of vibration is limited by the housing both ensuring the amount of vibration at the time of experiencing vibration output and reducing the overall thickness are achieved. Therefore, it is difficult to cope with the reduction in the thickness of the mounted components accompanying the reduction in the thickness and the increase in the screen size of the multi-function mobile phone.
  • the invention described in the present application aims to provide a multi-function vibration actuator that can easily secure the vibration amount of the sound pressure and the sensible vibration output even when the thickness is reduced.
  • the multi-function vibration actuator has only the acoustic transmission portion fixed to the ring-shaped housing and the magnetic circuit portion is attached via the suspension. Its technical feature is that More specifically, a structure is used in which a diaphragm is disposed on an end surface of a ring-shaped housing, and a magnetic circuit unit having a magnet and a weight is separately disposed on a suspension separately fixed to the housing.
  • the second aspect of the present invention is characterized by the structure described in the first aspect of the present application in which a magnetic air gap is provided in the magnetic circuit portion. More specifically, a magnet is provided inside a cup-shaped yoke made of a magnetic material, and a plate-shaped pole piece made of the same magnetic material is fixed on the magnet, and between the inner wall of the yoke and the outer edge of the pole piece. A structure in which a magnetic gap is formed is used.
  • the yoke and the weight are integrally formed in the second aspect.
  • the multi-function vibration actuator according to the first aspect of the present invention can reduce the thickness of the multi-function vibration actuator and increase the amount of vibration without impairing rigidity or the like.
  • the outer diameter and shape of the weight provided in the magnetic circuit section and the magnetic circuit section are not limited to the inner wall of the housing, and the magnetic circuit shape and weight are set according to the required vibration characteristics to adjust the vibration characteristics. be able to. Further, by limiting the number of components, the effect of reducing the number of parts and the number of assembly steps is also obtained.
  • the present application has a drive structure that reproduces sound by vibrating the housing via a sound transmission plate.
  • the surface of the mounting housing can be used as a diaphragm regardless of the mounting position of the acoustic transmission plate. Therefore, sound reproduction can be performed without providing sound emission holes required by other speakers, and a waterproof and dustproof effect can be easily imparted by sealing the mounting housing.
  • the structure is such that the acoustic transmission plate is directly attached to the mounting housing, it is possible to suppress the thickness dimension when assembled to the mounting housing.
  • the magnetic circuit portion is made independent from the housing, so that it is possible to secure the maximum amplitude at the time of bodily sensation vibration in the thin mounting housing.
  • a structure in which a magnetic air gap is provided in the magnetic circuit portion is used. For this reason, it is possible to concentrate the magnetic flux of the magnet mounted on the magnetic circuit unit in the magnetic gap, and to improve the responsiveness at the time of sound reproduction and sensation vibration in addition to the improvement of the magnetic efficiency.
  • the number of parts can be reduced and the overall strength can be increased. More specifically, in addition to the increase in strength by integrating the yoke and the weight as parts, the effect of securing the vibration amount due to the weight of the weight and reducing the number of processing steps for each part in the thin mounting housing. Can be obtained.
  • the thickness of the mounting housing it is possible to reduce the thickness of the mounting housing to be mounted without changing the size of the acoustic transmission portion, and at the same time, adjust the outside of the magnetic circuit portion according to the required amount of vibration.
  • the diameter and shape can be set.
  • Exploded perspective view of a multi-function vibration actuator used in an embodiment of the present invention 1 is a cross-sectional side view of the multi-function vibration actuator in the A-A ′ cross section of FIG. 1.
  • FIG. 1 is an overall perspective view of a multi-function vibration actuator used in the best mode of the present invention
  • FIG. 2 is an exploded perspective view thereof
  • FIG. 3 is a side sectional view taken along a line AA ′ in FIG. Respectively.
  • the multi-function vibration actuator used in this embodiment has a structure in which a yoke 7 provided with a weight 8 is projected out of the housing by making the housing 3 into a ring shape. Further, since the member in contact with the acoustic transmission diaphragm 1 made of a metal plate is used as the diaphragm, the acoustic transmission diaphragm 1 has a flat plate shape. As can be seen from FIGS. 2 and 3, in the multi-function vibration actuator described in the present embodiment, an acoustic transmission portion is constituted by the acoustic transmission diaphragm 1 provided with the voice coil 2.
  • a magnet 6 magnetized in the thickness direction is sandwiched between a pole piece 5 and a yoke 7 made of a magnetic material, and a weight 8 is provided on the yoke 7 to constitute a magnetic circuit section.
  • This embodiment has a dynamic structure in which the voice coil 2 of the acoustic transmission unit is disposed in the magnetic gap g of the magnetic circuit unit via a suspension 4 fixed to the housing 3.
  • the multi-function vibration actuator described in the present embodiment can be provided with a sound reproducing function and a vibration generating function by an acoustic transmission unit, and a function of generating a sensory vibration by a magnetic circuit unit. became.
  • the multi-function vibration actuator described in the present embodiment uses the dynamic structure. More specifically, by setting the input signal to the voice coil 2 in the vicinity of the resonance frequency of the casing to which the acoustic transmission unit is pasted, the sound reproduction function and vibration generation function by the vibration of the casing are provided. It can be used.
  • the housing 3 has a ring shape, so that other parts such as a cover can be omitted, and the overall structure can be made thin. .
  • the magnetic circuit portion protrudes to the lower side of the housing and the restriction in the radial direction of the magnetic circuit portion is eliminated by adopting the ring shape, it is possible to obtain an effect of increasing the vibration amount when experiencing bodily vibrations. did it.
  • These effects are achieved by reinforcing the housing 3 and reproducing the sound by the mounting housing using the acoustic transmission diaphragm. That is, the structure in which the housing 3 is reinforced by another driving member maintains rigidity even in a ring shape, and it has stable durability when holding the magnetic circuit portion via the suspension 4 and handling as a single component. It can be handled.
  • the suspension outer ring portion is formed by insert molding in the housing. For this reason, it is possible to further improve the rigidity of the housing 3 reinforced by the acoustic transmission diaphragm.
  • the diameter of the magnetic circuit portion is not limited by the housing or the like. For this reason, the external dimensions of the magnetic circuit unit and the weight 8 to be mounted can be set according to the space of the mounting housing and the required vibration amount. From the same technical point of view, it is also possible to adjust the vibration characteristics at the time of experiencing vibrations by arbitrarily setting the shape of the magnetic circuit unit.
  • the voice coil-yoke distance t1 in the vibration direction in the magnetic gap is longer than the magnetic circuit outer edge-housing end distance t2. For this reason, in the event of an impact such as a drop, the housing end can function as a stopper for the magnetic circuit portion, thereby preventing a collision between the voice coil and the yoke.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

[Problem] To provide a multifunction-type vibration actuator which, even when thinned down, can easily secure a sound pressure and a vibration amount for tangible vibration output. [Solution] By configuring a housing in the shape of a ring and adding a reinforcement structure using a sound propagation diaphragm, etc., it is possible to project a magnetic circuit unit from the housing. By employing such a configuration, the multifunction-type vibration actuator described in the present application is able to secure a sound pressure due to the vibration of a fitting case and a vibration amount due to the expansion of a projected magnetic circuit unit, even when the vibration actuator is thinned down.

Description

多機能型振動アクチュエータの薄型化Thinner multi-function vibration actuator
　本発明は、貼り付ける対象物を振動させることによって体感振動と音響再生とを行うと共に、磁気回路部自体が振動することによっても体感振動の出力が可能な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 relates to a multi-function vibration actuator having a dynamic structure capable of performing sensory vibration and sound reproduction by vibrating a target object to be pasted and capable of outputting sensory vibration even when a magnetic circuit unit itself vibrates.
　現在、携帯電話に代表される移動体通信機器は通話等の連絡機能とは別に、データ通信機能を強化し、音楽及び動画の再生を可能にした多機能携帯電話が主流となっている。この様な多機能携帯電話では他の要素と比較して大画面化が優先される為、着信等の音響発生機能については特許３９４９２７３（以下特許文献１として記載）及び特開２００９－１９５７９９（以下特許文献２として記載）といった振動発生装置によって筐体を振動させ、音響再生を行う方法が用いられている。ここで特許文献１記載の構造では振動板に振動発生装置を埋め込み、当該振動板内の埋め込み部内壁にボイスコイルからの振動を伝達するサブパネルを設置したことをその技術的特徴としている。また、特許文献２記載の構造では、ボイスコイルの振動によって貼付面を振動板とする音響再生機能と、サスペンションを介して支持した磁気回路部の振動による体感振動発生機能とを備えており、当該サスペンションについて、補助サスペンションを用いた周波数特性の最適化をその技術的特徴としている。 At present, mobile communication devices represented by mobile phones are mainly multi-function mobile phones that have enhanced data communication functions and can play music and videos apart from communication functions such as telephone calls. In such a multi-function mobile phone, priority is given to the enlargement of the screen as compared with other elements. Therefore, the sound generation function for incoming calls and the like is disclosed in Japanese Patent No. 3949273 (hereinafter referred to as Patent Document 1) and Japanese Patent Application Laid-Open No. 2009-195799 (hereinafter referred to as Japanese Unexamined Patent Application Publication No. 2009-195799). A method of performing sound reproduction by vibrating a housing by a vibration generator such as described in Patent Document 2 is used. Here, the structure described in Patent Document 1 is characterized in that a vibration generator is embedded in the diaphragm, and a sub-panel for transmitting vibration from the voice coil is installed on the inner wall of the embedded portion in the diaphragm. In addition, the structure described in Patent Document 2 includes a sound reproducing function in which a sticking surface is a diaphragm by vibration of a voice coil, and a sensory vibration generating function by vibration of a magnetic circuit unit supported through a suspension. The technical feature of the suspension is optimization of frequency characteristics using an auxiliary suspension.
特許３９４９２７３号Japanese Patent No. 3949273 特開２００９－１９５７９９号JP 2009-195799 A
　上述した技術的特徴を有している一方で特許文献１記載の振動発生装置ではその構造上、体感振動発生機能を備えていない為、多機能携帯電話への搭載時に別途振動モータ等の体感振動用アクチュエータを設けなければならないという課題を有している。また、特許文献２では磁気回路部及びサスペンションをハウジングに納めたことで、体感振動発生時の振動量が制限されてしまう。更に、体感振動デバイスが別途必要な特許文献１記載の構造及び、ハウジングによって振動量が制限される特許文献２記載の構造では、体感振動出力時の振動量確保と全体的な薄型化とを両立することができず、多機能携帯電話の薄型化及び大画面化に伴う搭載部品の薄型化に対応することが難しい。 While having the technical features described above, the vibration generating device described in Patent Document 1 does not have a function to generate a sensory vibration due to its structure, so that a sensory vibration such as a vibration motor is separately provided when mounted on a multi-function mobile phone. There is a problem that an actuator must be provided. Moreover, in patent document 2, the amount of vibration at the time of experiencing vibration is limited by housing the magnetic circuit portion and the suspension in the housing. Furthermore, in the structure described in Patent Document 1 that requires a separate sensory vibration device and the structure described in Patent Document 2 in which the amount of vibration is limited by the housing, both ensuring the amount of vibration at the time of experiencing vibration output and reducing the overall thickness are achieved. Therefore, it is difficult to cope with the reduction in the thickness of the mounted components accompanying the reduction in the thickness and the increase in the screen size of the multi-function mobile phone.
　上記課題を解決するために本願記載の発明では、薄型化に際しても音圧及び体感振動出力の振動量確保が容易な多機能型振動アクチュエータの提供を目的としている。 In order to solve the above problems, the invention described in the present application aims to provide a multi-function vibration actuator that can easily secure the vibration amount of the sound pressure and the sensible vibration output even when the thickness is reduced.
　上記目的のために本発明に於ける第１の態様では、多機能型振動アクチュエータについて、全体をリング形状としたハウジングに音響用伝達部を固定し、サスペンションを介して磁気回路部を取りつけたのみの構成としたことをその技術的特徴としている。より具体的には、リング形状のハウジング端面にダイアフラムを、同ハウジングに別途固定されたサスペンションにマグネット及び分銅を有する磁気回路部を、それぞれ対向配置して固定した構造を用いている。 For the purpose described above, in the first aspect of the present invention, the multi-function vibration actuator has only the acoustic transmission portion fixed to the ring-shaped housing and the magnetic circuit portion is attached via the suspension. Its technical feature is that More specifically, a structure is used in which a diaphragm is disposed on an end surface of a ring-shaped housing, and a magnetic circuit unit having a magnet and a weight is separately disposed on a suspension separately fixed to the housing.
　また、本発明第２の態様では、本願第１の態様で述べた構造について、磁気回路部に磁気空隙を設けた構造を特徴としている。より具体的には、磁性体からなるカップ型形状のヨーク内側にマグネットを設け、同じく磁性体からなる板状のポールピースを当該マグネットの上に固定し、ヨーク内壁とポールピース外縁部との間に磁気空隙を形成した構造を用いている。 Also, the second aspect of the present invention is characterized by the structure described in the first aspect of the present application in which a magnetic air gap is provided in the magnetic circuit portion. More specifically, a magnet is provided inside a cup-shaped yoke made of a magnetic material, and a plate-shaped pole piece made of the same magnetic material is fixed on the magnet, and between the inner wall of the yoke and the outer edge of the pole piece. A structure in which a magnetic gap is formed is used.
　また、本発明第３の態様では、前記第２の態様に於いて、ヨークと分銅とを一体に形成したことを特徴としている。 In the third aspect of the present invention, the yoke and the weight are integrally formed in the second aspect.
　上述した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、剛性等を損なうことなく多機能型振動アクチュエータ全体の薄型化と振動量の増加とを可能にしている。これは、本願記載の構造がハウジングをリング形状として薄型化し、音響用伝達板でハウジングの剛性を補う構造を用いていることによる効果となっている。即ち、本願記載の構造では磁気回路部の外径がハウジング内壁に制限されず、磁気回路部をハウジング下側に突出させた構造となる。この為、磁気回路部及び磁気回路部に設けた分銅の外径及び形状について、ハウジング内壁に制限されず、要求する振動特性に合わせて磁気回路形状及び分銅を設定し、振動特性の調整を行うことができる。また、構成部品を限定したことで、部品点数及び組立工数の減少という効果をも得ている。 By using the above-described structure, the multi-function vibration actuator according to the first aspect of the present invention can reduce the thickness of the multi-function vibration actuator and increase the amount of vibration without impairing rigidity or the like. This is due to the fact that the structure described in the present application is made thin by making the housing into a ring shape and uses a structure that supplements the rigidity of the housing with an acoustic transmission plate. That is, in the structure described in the present application, the outer diameter of the magnetic circuit portion is not limited to the inner wall of the housing, and the magnetic circuit portion protrudes downward from the housing. For this reason, the outer diameter and shape of the weight provided in the magnetic circuit section and the magnetic circuit section are not limited to the inner wall of the housing, and the magnetic circuit shape and weight are set according to the required vibration characteristics to adjust the vibration characteristics. be able to. Further, by limiting the number of components, the effect of reducing the number of parts and the number of assembly steps is also obtained.
　また、本願は音響用伝達板を介して筐体を振動させ、音響再生を行う駆動構造となっている。この為、音響用伝達板の取付位置に関わらず、取付筐体表面をダイアフラムとして使用することができる。従って、他のスピーカが必要とする放音孔を設けることなく音響再生を行うことができると共に、取付筐体を密閉することで容易に防水、防塵効果を付与することが可能となる。加えて、音響用伝達板を取付筐体に対して直接貼り付ける構造となる為、取付筐体に対する組込時の厚み寸法を抑えることができる。また、前述したように磁気回路部をハウジングから独立させたことで、薄型化された取付筐体に於ける体感振動時の振幅を最大限確保することが可能となる。 Also, the present application has a drive structure that reproduces sound by vibrating the housing via a sound transmission plate. For this reason, the surface of the mounting housing can be used as a diaphragm regardless of the mounting position of the acoustic transmission plate. Therefore, sound reproduction can be performed without providing sound emission holes required by other speakers, and a waterproof and dustproof effect can be easily imparted by sealing the mounting housing. In addition, since the structure is such that the acoustic transmission plate is directly attached to the mounting housing, it is possible to suppress the thickness dimension when assembled to the mounting housing. Further, as described above, the magnetic circuit portion is made independent from the housing, so that it is possible to secure the maximum amplitude at the time of bodily sensation vibration in the thin mounting housing.
　また、本発明第２の態様記載の構造では、磁気回路部に磁気空隙を設けた構造を用いている。この為、磁気回路部に搭載したマグネットの磁束を磁気空隙に集中させ、磁気効率の向上に加えて音響再生及び体感振動発生時に於ける即応性を向上させることが可能となる。 In the structure according to the second aspect of the present invention, a structure in which a magnetic air gap is provided in the magnetic circuit portion is used. For this reason, it is possible to concentrate the magnetic flux of the magnet mounted on the magnetic circuit unit in the magnetic gap, and to improve the responsiveness at the time of sound reproduction and sensation vibration in addition to the improvement of the magnetic efficiency.
　また、本発明第３の態様記載の構造を用いることで、部品点数を削減し、全体的な強度を増加することができる。より具体的には、ヨークと分銅を部品として統合することによって前記強度の増加に加えて、薄型化された取付筐体に於いて分銅重量による振動量の確保と部品毎の加工工数減少という効果を得ることができる。 Also, by using the structure described in the third aspect of the present invention, the number of parts can be reduced and the overall strength can be increased. More specifically, in addition to the increase in strength by integrating the yoke and the weight as parts, the effect of securing the vibration amount due to the weight of the weight and reducing the number of processing steps for each part in the thin mounting housing. Can be obtained.
　従って、これら本発明記載の構造を用いることで、搭載する取付筐体の薄型化に際しても音響用伝達部の大きさを変えること無く対応すると同時に、要求する振動量に合わせて磁気回路部の外径及び形状を設定することができる。 Therefore, by using these structures according to the present invention, it is possible to reduce the thickness of the mounting housing to be mounted without changing the size of the acoustic transmission portion, and at the same time, adjust the outside of the magnetic circuit portion according to the required amount of vibration. The diameter and shape can be set.
　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、薄型化に際しても音圧及び体感振動出力の振動量確保が容易な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 multifunctional vibration actuator that can easily secure the vibration amount of the sound pressure and the sensory vibration output even when the thickness is reduced.
本発明の実施形態に於いて用いる多機能型振動アクチュエータの全体斜視図Overall perspective view of multifunctional vibration actuator used in an embodiment of the present invention 本発明の実施形態に於いて用いる多機能型振動アクチュエータの分解斜視図Exploded perspective view of a multi-function vibration actuator used in an embodiment of the present invention 図１のＡ－Ａ’断面に於ける多機能型振動アクチュエータの側断面図1 is a cross-sectional side view of the multi-function vibration actuator in the A-A ′ cross section of FIG. 1.
　以下に、図１、図２及び図３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 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に本発明の最良の実施形態に於い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に同分解斜視図を、そして図３に図１中Ａ－Ａ’断面における側断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 best mode of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a side sectional view taken along a line AA ′ in FIG. Respectively.
　図１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、ハウジング３をリング形状とすることによって、分銅８を設けたヨーク７をハウジング外に突出させた構造を形成している。また、金属板からなる音響伝達用振動板１を介して接触した部材を振動板として用いる為、音響伝達用振動板１を平板形状としている。また、図２及び図３から解るように、本実施形態記載の多機能型振動アクチュエータは、ボイスコイル２を設けた音響伝達用振動板１によって音響用伝達部を構成している。加えて、厚み方向に着磁したマグネット６を磁性体からなるポールピース５及びヨーク７で挟み、当該ヨーク７に分銅８を設けることによって磁気回路部を構成している。本実施形態ではハウジング３に固定したサスペンション４を介して当該磁気回路部の磁気空隙ｇに前記音響用伝達部のボイスコイル２を配置したダイナミック構造となっている。 As can be seen from FIG. 1, the multi-function vibration actuator used in this embodiment has a structure in which a yoke 7 provided with a weight 8 is projected out of the housing by making the housing 3 into a ring shape. Further, since the member in contact with the acoustic transmission diaphragm 1 made of a metal plate is used as the diaphragm, the acoustic transmission diaphragm 1 has a flat plate shape. As can be seen from FIGS. 2 and 3, in the multi-function vibration actuator described in the present embodiment, an acoustic transmission portion is constituted by the acoustic transmission diaphragm 1 provided with the voice coil 2. In addition, a magnet 6 magnetized in the thickness direction is sandwiched between a pole piece 5 and a yoke 7 made of a magnetic material, and a weight 8 is provided on the yoke 7 to constitute a magnetic circuit section. This embodiment has a dynamic structure in which the voice coil 2 of the acoustic transmission unit is disposed in the magnetic gap g of the magnetic circuit unit via a suspension 4 fixed to the housing 3.
　この様な構造としたことで本実施形態記載の多機能型振動アクチュエータは、音響用伝達部による音響再生機能及び振動発生機能と、磁気回路部による体感振動の発生機能とを備えることが可能となった。これは、本実施形態記載の多機能型振動アクチュエータが前記ダイナミック構造を用いていることによる効果となっている。より具体的には、ボイスコイル２への入力信号を、音響用伝達部を貼り付ける筐体の共振周波数付近に設定することによって、当該筐体の振動による音響再生機能と体感振動発生機能とを使用可能としている。この為、搭載する音響伝達用振動板１よりも広い面積の取付筐体全体を振動板として音響再生及び体感振動出力を行うことができる。また、その駆動構造上、放音孔を取付筐体側に設ける必要が無い為、取付筐体を容易に防水及び防塵構造とすることが可能となる。加えて、当該入力信号を磁気回路部の共振周波数付近に設定することで、前記筐体による振動とは別に磁気回路部の振動による体感振動発生機能を使用することができる。 With such a structure, the multi-function vibration actuator described in the present embodiment can be provided with a sound reproducing function and a vibration generating function by an acoustic transmission unit, and a function of generating a sensory vibration by a magnetic circuit unit. became. This is due to the fact that the multi-function vibration actuator described in the present embodiment uses the dynamic structure. More specifically, by setting the input signal to the voice coil 2 in the vicinity of the resonance frequency of the casing to which the acoustic transmission unit is pasted, the sound reproduction function and vibration generation function by the vibration of the casing are provided. It can be used. For this reason, sound reproduction and bodily sensation vibration output can be performed by using the entire mounting housing having a larger area than the mounted acoustic transmission diaphragm 1 as a diaphragm. Further, because of the drive structure, it is not necessary to provide a sound emitting hole on the mounting housing side, so that the mounting housing can be easily made waterproof and dustproof. In addition, by setting the input signal in the vicinity of the resonance frequency of the magnetic circuit unit, it is possible to use a bodily sensation vibration generation function due to the vibration of the magnetic circuit unit separately from the vibration of the housing.
　上記基本構造の技術的特徴及びそれによって得られる効果に加え、本実施形態ではハウジング３をリング形状とすることによって、カバー等の他部品を省き、全体的に薄型の構造とすることができた。また、当該リング形状としたことで磁気回路部がハウジング下側に突出し、磁気回路部径方向での制限が解消される為、体感振動発生時に於ける振動量の増加という効果をも得ることができた。これらの効果は、音響伝達用振動板によってハウジング３の補強と取付筐体による音響再生とを行うことによる効果となっている。即ち、ハウジング３が他の駆動部材によって補強される構造とすることでリング形状としても剛性を保ち、サスペンション４を介した磁気回路部の保持及び、部品単体としての取り回し等に際して安定した耐久性と共に取り扱うことができる。 In addition to the technical characteristics of the basic structure and the effects obtained thereby, in the present embodiment, the housing 3 has a ring shape, so that other parts such as a cover can be omitted, and the overall structure can be made thin. . In addition, since the magnetic circuit portion protrudes to the lower side of the housing and the restriction in the radial direction of the magnetic circuit portion is eliminated by adopting the ring shape, it is possible to obtain an effect of increasing the vibration amount when experiencing bodily vibrations. did it. These effects are achieved by reinforcing the housing 3 and reproducing the sound by the mounting housing using the acoustic transmission diaphragm. That is, the structure in which the housing 3 is reinforced by another driving member maintains rigidity even in a ring shape, and it has stable durability when holding the magnetic circuit portion via the suspension 4 and handling as a single component. It can be handled.
　また、図２及び図３から解るように、本実施形態ではサスペンション外輪部をハウジング内にインサート成型した構造としている。この為、前記音響伝達用振動板によって補強されたハウジング３の剛性を更に向上することが可能となった。また、本実施形態では磁気回路部の径寸法について、ハウジング等によって制限されない構造となっている。この為、取付筐体のスペース及び必要とする振動量に合わせて磁気回路部及び搭載する分銅８の外形寸法を設定することができる。尚、同じ技術的見地から、体感振動発生時の振動特性について、磁気回路部の形状を任意に設定することによって調整することもまた、可能となっている。 Further, as can be seen from FIGS. 2 and 3, in this embodiment, the suspension outer ring portion is formed by insert molding in the housing. For this reason, it is possible to further improve the rigidity of the housing 3 reinforced by the acoustic transmission diaphragm. In the present embodiment, the diameter of the magnetic circuit portion is not limited by the housing or the like. For this reason, the external dimensions of the magnetic circuit unit and the weight 8 to be mounted can be set according to the space of the mounting housing and the required vibration amount. From the same technical point of view, it is also possible to adjust the vibration characteristics at the time of experiencing vibrations by arbitrarily setting the shape of the magnetic circuit unit.
　上記述べた効果に加えて、本実施形態では磁気空隙に於ける振動方向でのボイスコイル－ヨーク間距離ｔ１が磁気回路外縁部－ハウジング端部間距離ｔ２よりも長い構造となっている。この為、落下等の衝撃に際して、ハウジング端部が磁気回路部に対するストッパとして機能し、ボイスコイル－ヨーク間に於ける衝突を防ぐ構造とすることが可能となった。 In addition to the effects described above, in this embodiment, the voice coil-yoke distance t1 in the vibration direction in the magnetic gap is longer than the magnetic circuit outer edge-housing end distance t2. For this reason, in the event of an impact such as a drop, the housing end can function as a stopper for the magnetic circuit portion, thereby preventing a collision between the voice coil and the yoke.
　以上述べたように、本願実施形態記載の構造を用いることによって、薄型化に際しても音圧及び体感振動出力の振動量確保が容易な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 embodiment of the present application, it is possible to provide a multi-function vibration actuator that can easily secure the vibration amount of the sound pressure and the sensory vibration output even when the thickness is reduced.
　１　　音響伝達用振動板
　２　　ボイスコイル
　３　　ハウジング
　４　　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
　９　　接点端子
　
　ｇ　　磁気空隙
　ｔ１　ボイスコイル－ヨーク間距離
　ｔ２　磁気回路外縁部－ハウジング端部間距離 DESCRIPTION OF SYMBOLS 1 Diaphragm for sound transmission 2 Voice coil 3 Housing 4 Suspension 5 Pole piece 6 Magnet 7 Yoke 8 Weight 9 Contact terminal
g Magnetic air gap t1 Distance between voice coil and yoke t2 Distance between magnetic circuit outer edge and housing end

Claims (3)

  1. 　接点端子を有し、全体をリング形状としたハウジングの端面に固定され、
    ボイスコイルを取りつけた平板からなる音響用伝達部と、
    当該ハウジングにサスペンションを介して取りつけたマグネット及び分銅を有する磁気回路部のみからなり、
    前記磁気回路部と音響再生部とが対向配置されているダイナミック構造の多機能型振動アクチュエータ。
    It has a contact terminal and is fixed to the end face of the housing that is entirely ring-shaped
    An acoustic transmission unit comprising a flat plate with a voice coil attached thereto;
    It consists only of a magnetic circuit part having a magnet and a weight attached to the housing via a suspension,
    A multi-function vibration actuator having a dynamic structure in which the magnetic circuit section and the sound reproducing section are arranged to face each other.
  2. 　前記磁気回路部に、磁性体からなるヨーク及びポールピースでマグネットを挟み、磁気空隙を形成した構造を用いた請求項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 a magnetic gap is formed in the magnetic circuit part by sandwiching a magnet with a yoke and a pole piece made of a magnetic material.
  3. 　前記ヨーク及び分銅が一体に形成されている請求項２記載の多機能型振動アクチュエータ。 The multi-function vibration actuator according to claim 2, wherein the yoke and the weight are integrally formed.
PCT/JP2014/059518 2013-04-01 2014-03-31 Thinning-down of multifunction-type vibration actuator WO2014163047A1 (en)

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JP2013076041A JP2014204156A (en) 2013-04-01 2013-04-01 Thickness reduction in multi-functional vibration actuator
JP2013-076041 2013-04-01

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000023440A (en) * 1998-07-06 2000-01-21 Sanyo Electric Co Ltd Sound and vibration generating device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000023440A (en) * 1998-07-06 2000-01-21 Sanyo Electric Co Ltd Sound and vibration generating device

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