JP2006167523A - Oscillating linear actuator - Google Patents

Oscillating linear actuator Download PDF

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Publication number
JP2006167523A
JP2006167523A JP2004360651A JP2004360651A JP2006167523A JP 2006167523 A JP2006167523 A JP 2006167523A JP 2004360651 A JP2004360651 A JP 2004360651A JP 2004360651 A JP2004360651 A JP 2004360651A JP 2006167523 A JP2006167523 A JP 2006167523A
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Prior art keywords
magnet
frame
linear actuator
coil
vibration
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Tomoyuki Kugo
智之 久郷
Tomohide Aoyanagi
智英 青柳
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Namiki Precision Jewel Co Ltd
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Namiki Precision Jewel Co Ltd
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Priority to JP2004360651A priority Critical patent/JP2006167523A/en
Priority to PCT/JP2005/022749 priority patent/WO2006064750A1/en
Publication of JP2006167523A publication Critical patent/JP2006167523A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oscillating linear actuator providing vibration large enough to physically feel, while maximally keeping the magnitude of a magnet. <P>SOLUTION: The whole actuator is made thin without miniaturizing the magnet by providing a magnet passing through a frame without forming magnet gap between a yoke and itself. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は携帯電話といった移動体通信機器に用いられる振動リニアアクチュエータに関する。 The present invention relates to a vibration linear actuator used in a mobile communication device such as a mobile phone.

現在、携帯電話を代表とする移動体通信機器には着信を音によって知らせる機能の他に、体感振動によって着信を報知する無音報知機能が設けられている。このような機能を持たせるため、携帯電話には振動アクチュエータが搭載されており、代表的なものとしてモータの回転軸に偏心分銅を取り付けて振動させる振動モータがある。 Currently, a mobile communication device represented by a mobile phone is provided with a silent notification function for notifying an incoming call by a sensation vibration in addition to a function for notifying an incoming call by sound. In order to provide such a function, a cellular phone is equipped with a vibration actuator. As a typical example, there is a vibration motor that vibrates by attaching an eccentric weight to the rotation shaft of the motor.

しかしながら、前記振動モータでは回転運動から振動を得るため、往復動による振動に比べると振動時のトルクが制限されるという課題があった。この課題に対してマグネットとコイルを備え、サスペンションで支持したマグネットをコイルの発生する磁力によって直線上を往復動させる振動リニアアクチュエータがあり、特許文献１，２として出願されている。
また、前記振動リニアアクチュエータは厚み方向に振動するので、着信を振動によって知らせる際に使用者が感知しやすいという利点がある。 However, since the vibration motor obtains vibration from rotational motion, there is a problem that torque during vibration is limited as compared with vibration due to reciprocation. In order to solve this problem, there is a vibration linear actuator that includes a magnet and a coil and reciprocally moves a magnet supported by a suspension on a straight line by a magnetic force generated by the coil.
Further, since the vibration linear actuator vibrates in the thickness direction, there is an advantage that it is easy for the user to detect when an incoming call is notified by vibration.

特開平９−２０５７６３JP 9-205763 A 特開２００３−９４９３JP2003-9493

しかしながら近年、携帯電話の薄型化に伴い搭載される振動アクチュエータにも薄型化が求められている。
上記薄型化の要求に対して前記振動リニアアクチュエータではその構造上、薄型化すると中に備えてあるマグネットの厚みが薄くなり、磁束が弱まることによって振動時のトルクが低下してしまうという課題を抱えていた。 However, in recent years, with the reduction in thickness of mobile phones, vibration actuators mounted are also required to be thinner.
In response to the demand for the above-mentioned thinning, the vibration linear actuator has a problem in that when it is thinned, the thickness of the magnet provided therein becomes thin, and the torque at the time of vibration is reduced by weakening the magnetic flux. It was.

そこで本発明は薄型化してもマグネットの厚みを変えず、振動時のトルクを維持することが可能な振動リニアアクチュエータを提供することを目的とする。
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vibration linear actuator that can maintain a torque during vibration without changing the thickness of a magnet even if the thickness is reduced.

前記課題を解決するため、請求項１記載の発明では、フレームを貫通してマグネットを設け、前記フレーム表面に取り付けたサスペンションを介して前記フレームを筐体内に支持し、更に前記マグネット先端部をコイル内壁に近接して配置した構造としたことを特徴としている。 In order to solve the above-mentioned problem, in the invention according to claim 1, a magnet is provided through the frame, the frame is supported in the housing via a suspension attached to the surface of the frame, and the tip of the magnet is further coiled. It is characterized by a structure arranged close to the inner wall.

請求項２記載の発明では、請求項１記載の振動リニアアクチュエータに於いて、フレームを高比重材料によって作成した事を特徴としている。 According to a second aspect of the present invention, in the vibration linear actuator according to the first aspect, the frame is made of a high specific gravity material.

請求項３記載の発明では、請求項１又は２記載の振動リニアアクチュエータに於いて、フレーム外周と筐体内側壁との隙間を調節することにより駆動時の空気の移動量を制限したことを特徴としている。
According to a third aspect of the present invention, in the vibration linear actuator according to the first or second aspect, the amount of air movement during driving is limited by adjusting the gap between the outer periphery of the frame and the inner wall of the housing. Yes.

請求項１記載の発明によれば、フレームを貫通してマグネットを設け、更にコイル内壁にマグネット先端部を配置することによりマグネットとコイルの引力又は斥力によって可動子を振動させるので、トッププレート等の磁気回路構成部品の数を減らして振動駆動を実現すると同時に、更にフレームを貫通してマグネットを設けたことにより、振動リニアアクチュエータの厚みをほぼマグネットとマグネットを備えた可動子の振幅サイズに収めることが可能となる。
従って、マグネットの厚みを変えることなく容易に振動リニアアクチュエータを薄型化することが可能となると共に、特許文献１，２の様に磁気空隙にコイルを配置しない事による振動トルクの低下を補うことが出来る。 According to the first aspect of the present invention, since the magnet is provided through the frame and the magnet tip is disposed on the inner wall of the coil, the movable element is vibrated by the attractive force or repulsive force of the magnet and the coil. Vibration drive is realized by reducing the number of magnetic circuit components, and at the same time, the magnet is further penetrated through the frame, so that the thickness of the vibration linear actuator can be kept within the amplitude of the mover equipped with the magnet and magnet. Is possible.
Therefore, it is possible to easily reduce the thickness of the vibration linear actuator without changing the thickness of the magnet, and to compensate for a decrease in vibration torque caused by not arranging a coil in the magnetic gap as in Patent Documents 1 and 2. I can do it.

更に、特許文献１，２に示す振動リニアアクチュエータの様に可動子がサスペンションを介して筐体内壁で支持される構造とせずに、フレーム表面に設けたサスペンションを介して筐体底部に設けたプレート５によって可動子を支持した構造を用いたことで、振動リニアアクチュエータの径方向の寸法を広げることなく、振動リニアアクチュエータ全体を小型に構成することが出来る。 Further, the movable element is not supported by the inner wall of the casing through the suspension as in the case of the vibration linear actuator shown in Patent Documents 1 and 2, but the plate provided at the bottom of the casing through the suspension provided on the surface of the frame. By using the structure in which the movable element is supported by 5, the entire vibration linear actuator can be made compact without increasing the radial dimension of the vibration linear actuator.

請求項２記載の発明に於いては、前記のようにマグネットとコイルのみで磁気回路を構成しているためフレームの材料が磁性材料に限定されない。従ってフレームに高比重材料を用いることでフレームを錘として使用し、振動時のトルクを大きくすることが可能となる。 In the second aspect of the present invention, since the magnetic circuit is constituted only by the magnet and the coil as described above, the material of the frame is not limited to the magnetic material. Therefore, by using a high specific gravity material for the frame, it is possible to use the frame as a weight and increase the torque during vibration.

請求項３記載の発明によれば、筐体内側壁とフレームとの隙間を制限することによりマグネットと一体となったフレームを境にして上下の筐体空間に隔てられた空気をダンパとして使用することで、特別な部品を増やすことなく駆動時の可動子振幅−周波数特性を平坦にすることが可能となる。
この方法によれば必要最小限の部品点数で安定した可動子振幅−周波数特性を容易に得ることが出来る。 According to the third aspect of the present invention, the air separated into the upper and lower casing spaces is used as a damper with the frame integrated with the magnet as a boundary by limiting the gap between the inner wall of the casing and the frame. Thus, it is possible to flatten the mover amplitude-frequency characteristics during driving without adding special parts.
According to this method, a stable mover amplitude-frequency characteristic can be easily obtained with a minimum number of parts.

以上説明したように、本発明によって振動トルクを維持したままで薄く、小径で安定した周波数特性を持つ振動リニアアクチュエータを得ることが出来る。
更に、従来の磁気空隙にコイルを配置する構造の振動リニアアクチュエータに比べて部品点数が少ないので組み立て工数を少なくし、コストを抑えることが可能となる。
As described above, according to the present invention, it is possible to obtain a vibration linear actuator that is thin, has a small diameter, and has stable frequency characteristics while maintaining vibration torque.
Furthermore, since the number of parts is smaller than that of a vibration linear actuator having a structure in which a coil is arranged in a conventional magnetic gap, it is possible to reduce the number of assembling steps and reduce the cost.

以下に図面を参照して本発明の実施形態に関わる振動リニアアクチュエータについて説明する。 A vibration linear actuator according to an embodiment of the present invention will be described below with reference to the drawings.

図１に本発明で用いる第一の実施形態の側断面図を示す。
図１に示した側断面図からも解るように、本実施例における振動リニアアクチュエータはフレーム２、前記フレーム２を貫通して設けたマグネット３、から成る可動子と、フレーム表面外周で前記可動子を支持するサスペンション６、前記可動子を駆動させるコイル１、そしてそれらを収めるカバー４とプレート５から成る筐体とで構成されており、フレーム２を貫通してマグネット３を設けた構造としたことで、特許文献１，２に示したトッププレートやヨークといった磁気回路構成部品を搭載する事無く、厚み方向においてマグネット３の大きさを保ったままで振動リニアアクチュエータ全体の薄型化を可能としている。 FIG. 1 shows a side sectional view of a first embodiment used in the present invention.
As can be seen from the side sectional view shown in FIG. 1, the vibration linear actuator in this embodiment is a movable element composed of a frame 2, a magnet 3 provided through the frame 2, and the movable element on the outer periphery of the frame surface. A suspension 6 for supporting the movable element, a coil 1 for driving the movable element, a cover 4 for housing them, and a casing made up of a plate 5, and a structure in which a magnet 3 is provided through the frame 2. Thus, the entire vibration linear actuator can be made thin while maintaining the size of the magnet 3 in the thickness direction without mounting the magnetic circuit components such as the top plate and the yoke shown in Patent Documents 1 and 2.

本実施形態では、コイル１に可動子の共振周波数付近の駆動電流を流す事でコイル１が磁界を発生し、コイル１の発生する磁界とマグネット３の発生する磁界との間に働く引力又は斥力によってサスペンション６に支持された可動子を上下に振動させる構造となっている。 In this embodiment, the coil 1 generates a magnetic field by passing a driving current near the resonance frequency of the mover through the coil 1, and the attractive force or repulsive force acting between the magnetic field generated by the coil 1 and the magnetic field generated by the magnet 3. Thus, the movable member supported by the suspension 6 is vibrated up and down.

したがって、磁気回路はマグネット３とコイル１のみで構成されており、特許文献１，２で使用されているトッププレート等の磁路を形成する部品が必要なく、従来の振動リニアアクチュエータに比べて部品点数を少なくすることが出来る。 Therefore, the magnetic circuit is composed only of the magnet 3 and the coil 1 and does not require a part for forming a magnetic path such as a top plate used in Patent Documents 1 and 2, and is a part compared to a conventional vibration linear actuator. The score can be reduced.

また、特許文献１、２のように筐体内側壁に取り付けたサスペンションを介して可動子を支持する構造ではなく、フレーム２表面に取り付けたサスペンション６をプレート５によって支持した構造としたことで振動リニアアクチュエータ全体の径方向の寸法を抑え、フレーム振動時に錘として機能するフレーム２の体積を得るとともに、特許文献１，２に比べてサスペンション６のフレーム２とプレート５に対する接合部の面積を大きく取ることが出来る構造となっている。 Further, instead of the structure in which the mover is supported via the suspension attached to the inner wall of the casing as in Patent Documents 1 and 2, the suspension 6 attached to the surface of the frame 2 is supported by the plate 5 so that the vibration linear The overall dimension of the actuator in the radial direction is suppressed, the volume of the frame 2 that functions as a weight when the frame vibrates is obtained, and the area of the joint portion of the suspension 6 to the frame 2 and the plate 5 is made larger than in Patent Documents 1 and 2. It has a structure that can.

更に本実施例に示した振動リニアアクチュエータは従来の振動リニアアクチュエータよりも部品点数が少なく、特許文献１，２記載の振動リニアアクチュエータの様にトッププレートとヨークがマグネットの厚み方向に配置されていない為にマグネット３の大きさと可動子の振幅によって筐体の厚み方向の寸法が決定するので、ヨークとトッププレートで磁気空隙を形成している従来の振動リニアアクチュエータに比べて容易に薄型化することができる。 Furthermore, the vibration linear actuator shown in this embodiment has fewer parts than the conventional vibration linear actuator, and the top plate and the yoke are not arranged in the thickness direction of the magnet unlike the vibration linear actuators described in Patent Documents 1 and 2. Therefore, since the size in the thickness direction of the housing is determined by the size of the magnet 3 and the amplitude of the mover, the thickness can be easily reduced as compared with the conventional vibration linear actuator in which the magnetic gap is formed by the yoke and the top plate. Can do.

本実施例ではカバー４内側壁とフレーム２側面との隙間を0.05mm〜0.15mmの間に設定しており、これによってフレーム２の上下での空気の移動を制限し、両空間内の空気をダンパとして使用し、平坦な可動子振幅−周波数特性を得ている。 In this embodiment, the gap between the inner wall of the cover 4 and the side surface of the frame 2 is set between 0.05 mm and 0.15 mm, thereby restricting the movement of the air above and below the frame 2 and allowing the air in both spaces to flow. Used as a damper, a flat mover amplitude-frequency characteristic is obtained.

本実施例と同じ技術的見地からサスペンション６に板バネ以外の弾性体を使用したり、コイル１を印刷基板によってプレート２内側に形成する等の方法によっても同様の効果が得られる。 From the same technical point of view as in this embodiment, the same effect can be obtained by using an elastic body other than the leaf spring for the suspension 6 or by forming the coil 1 on the inside of the plate 2 with a printed board.

図２に本発明で用いる第２の実施形態の側断面図を示す。
図２に示した側断面図からも解るように、本実施例における振動リニアアクチュエータはマグネット３、フレーム２、から成る可動子と、可動子を支持するサスペンション６、前記可動子を駆動させるコイル１、そしてそれらを収めるカバー４とプレート５、及び基板７から成る筐体とで構成されている。 FIG. 2 shows a side sectional view of a second embodiment used in the present invention.
As can be seen from the side sectional view shown in FIG. 2, the vibration linear actuator in this embodiment is a mover composed of a magnet 3 and a frame 2, a suspension 6 that supports the mover, and a coil 1 that drives the mover. , And a cover 4 for housing them, a plate 5, and a housing made of a substrate 7.

本実施形態の駆動構造は第一の実施形態と同じであり、コイル１に駆動電流を流した際のマグネット３との間に働く引力又は斥力によってサスペンション６に支持されたフレーム２とマグネット３から成る可動子を上下方向に振動させる構造となっている。 The drive structure of the present embodiment is the same as that of the first embodiment. From the frame 2 and the magnet 3 supported by the suspension 6 by attractive force or repulsive force acting between the coil 3 and the magnet 3 when a drive current is passed through the coil 1. The movable element is configured to vibrate in the vertical direction.

又、実施例１同様、カバー４内側壁とフレーム２側面の隙間を0.05mm〜0.15mmに設定することによって平坦な可動子振幅−周波数特性を得ている。 As in the first embodiment, a flat mover amplitude-frequency characteristic is obtained by setting the gap between the inner wall of the cover 4 and the side surface of the frame 2 to 0.05 mm to 0.15 mm.

本実施形態では第一の実施例と違い、フレーム２表面の内周部に取り付けたサスペンション６を介してフレーム２とマグネット３からなる可動子を支持した構造となっている。 Unlike the first embodiment, this embodiment has a structure in which a movable element composed of the frame 2 and the magnet 3 is supported via a suspension 6 attached to the inner peripheral portion of the surface of the frame 2.

以上の実施例に依れば、マグネットの大きさを維持し、振動時のトルクを保ったまま従来よりも小径、薄型で平坦な周波数特性の振動リニアアクチュエータを得ることが出来る。
According to the above embodiment, it is possible to obtain a vibration linear actuator having a smaller diameter, a thinner and flat frequency characteristic than the conventional one while maintaining the magnet size and maintaining the vibration torque.

本発明に於ける第一の実施形態の側断面図Side sectional view of the first embodiment of the present invention 本発明に於ける第二の実施形態の側断面図Side sectional view of the second embodiment of the present invention

符号の説明Explanation of symbols

１ コイル
２ フレーム
３ マグネット
４ カバー
５ プレート
６ サスペンション
７ 基板
1 Coil 2 Frame 3 Magnet 4 Cover 5 Plate 6 Suspension 7 Substrate

Claims (3)

筐体内壁に１つのコイルを配置し、前記コイルと前記コイルの磁束内に配置したマグネットとで磁気回路を構成し、前記マグネットを備えた可動子を筐体内部にサスペンションを介して取り付けた構造で、前記コイルに駆動電流を流すことによってコイルとマグネットの間に相互の磁気駆動力を発生させる振動リニアアクチュエータに於いて、
可動子を構成するフレームを貫通してマグネットを設け、前記フレーム表面に取り付けたサスペンションを介して前記フレームを筐体内に支持し、更に前記マグネット先端部をコイル内壁に近接して配置したことを特徴とする振動リニアアクチュエータ。 A structure in which one coil is arranged on the inner wall of the housing, a magnetic circuit is constituted by the coil and a magnet arranged in the magnetic flux of the coil, and a mover provided with the magnet is attached to the inside of the housing via a suspension. In a vibrating linear actuator that generates a mutual magnetic driving force between a coil and a magnet by passing a driving current through the coil,
A magnet is provided through the frame constituting the mover, the frame is supported in the housing via a suspension attached to the surface of the frame, and the magnet tip is disposed close to the inner wall of the coil. Vibration linear actuator. 前記フレームが少なくとも鉄よりも比重の重い高比重材料を用いて成ることを特徴とする請求項１記載の振動リニアアクチュエータ。 2. The vibration linear actuator according to claim 1, wherein the frame is made of a high specific gravity material having a specific gravity heavier than that of iron. 前記筐体内側壁とフレームとの隙間を0.05mm〜0.15mmに制限することによって筐体内部に於ける可動子を挟んだ上下の空間の相互の空気の移動量を制限し、駆動時に前記空間内の空気をダンパとして使用することを特徴とする請求項１及び２に記載の振動リニアアクチュエータ。
By restricting the gap between the inner wall of the casing and the frame to 0.05 mm to 0.15 mm, the amount of movement of air between the upper and lower spaces sandwiching the mover inside the casing is limited, The vibration linear actuator according to claim 1, wherein the air is used as a damper.
JP2004360651A 2004-12-14 2004-12-14 Oscillating linear actuator Withdrawn JP2006167523A (en)

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JP2004360651A JP2006167523A (en) 2004-12-14 2004-12-14 Oscillating linear actuator
PCT/JP2005/022749 WO2006064750A1 (en) 2004-12-14 2005-12-12 Vibrating linear actuator

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JP2004360651A JP2006167523A (en) 2004-12-14 2004-12-14 Oscillating linear actuator

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Cited By (3)

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KR100748592B1 (en) 2006-11-15 2007-08-10 김정훈 Subminiature linear vibrator
WO2008060060A1 (en) * 2006-11-15 2008-05-22 Jung-Hoon Kim Subminiature linear vibrator
US7671493B2 (en) 2007-03-09 2010-03-02 Sony Corporation Vibration assembly, input device using the vibration assembly, and electronic equipment using the input device

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JP2009028640A (en) * 2007-07-26 2009-02-12 Mitsumi Electric Co Ltd Vibration generating device
CN102214966A (en) * 2010-04-02 2011-10-12 大银微系统股份有限公司 Platform cover plate supporting device of linear motor

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JPH09117721A (en) * 1994-09-28 1997-05-06 Seiko Instr Inc Vibration module
JP2003225613A (en) * 2002-02-05 2003-08-12 Citizen Electronics Co Ltd Axial direction driven vibrating body
JP4630958B2 (en) * 2003-02-27 2011-02-09 並木精密宝石株式会社 Multifunctional actuator and portable terminal device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100748592B1 (en) 2006-11-15 2007-08-10 김정훈 Subminiature linear vibrator
WO2008060060A1 (en) * 2006-11-15 2008-05-22 Jung-Hoon Kim Subminiature linear vibrator
US7671493B2 (en) 2007-03-09 2010-03-02 Sony Corporation Vibration assembly, input device using the vibration assembly, and electronic equipment using the input device

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