JP2014104377A - Excitation device - Google Patents

Excitation device Download PDF

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JP2014104377A
JP2014104377A JP2012257003A JP2012257003A JP2014104377A JP 2014104377 A JP2014104377 A JP 2014104377A JP 2012257003 A JP2012257003 A JP 2012257003A JP 2012257003 A JP2012257003 A JP 2012257003A JP 2014104377 A JP2014104377 A JP 2014104377A
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conductor plate
piezoelectric element
vibration
weight
main surface
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JP5991904B2 (en
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Osamu Yamazaki
修 山崎
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Tokin Corp
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NEC Tokin Corp
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Abstract

PROBLEM TO BE SOLVED: To protect a piezoelectric element of an excitation device from an impact force.SOLUTION: An excitation device comprises: support parts 21-24; a conductor plate 3; a flat plate-like piezoelectric element 6; and a weight 5. Both longitudinal ends of the conductor plate 3 are supported by the support parts 21-24. The weight 5 is fixed to a central part of a first principal plane of the conductor plate 3. The piezoelectric element 6 is fixed to a central part of a second principal plane of the conductor plate 3. A central part of the conductor plate 3 has an extension part 31 that is extended to the side of the first principal plane or the side of the second principal plane.

Description

本発明は、取り付けられた回路基板等に振動を伝播させる加振装置に関する。   The present invention relates to a vibration exciter that propagates vibration to an attached circuit board or the like.

携帯電話やスマートフォン等の携帯機器が使用者へ振動による操作感を与える試みがなされている。特許文献１は、このような操作感を与えるため、圧電バイモルフ素子によりタッチパネルを振動させることを提案している。   Attempts have been made to give a user a sense of operation by vibration of a mobile device such as a mobile phone or a smartphone. Patent Document 1 proposes that the touch panel be vibrated by a piezoelectric bimorph element in order to give such a feeling of operation.

また特許文献２は、振動板に圧電体を貼り付けたバイモルフ素子に錘を取り付けた圧電振動装置を提案している。   Patent Document 2 proposes a piezoelectric vibration device in which a weight is attached to a bimorph element in which a piezoelectric body is attached to a vibration plate.

特開２００５−３０３９３７号公報JP 2005-303937 A 特開平７−２１３９９７号公報JP-A-7-213997

携帯機器は落下等の衝撃力を受ける場合も多く、携帯機器内部の加振装置がこのような衝撃力を受けることで圧電素子が損傷を受けた場合には、振動を発生する能力が低下するという問題がある。   In many cases, portable devices are subject to impact such as dropping, and when the piezoelectric device is damaged by the impact of the vibration device inside the portable device, the ability to generate vibration is reduced. There is a problem.

従って本発明の目的は、加振装置における圧電素子を衝撃力から保護することにある。   Accordingly, an object of the present invention is to protect a piezoelectric element in a vibration exciter from an impact force.

上記課題を本発明は、支持部と、導体板と、平板状の圧電素子と、錘を備え、前記導体板の長手方向両端部は前記支持部により支持され、前記導体板における第１の主面の中央部には前記錘が固定され、前記導体板における第２の主面の中央部には前記圧電素子が固定され、前記導体板の中央部には前記第１の主面側、または前記第２の主面側へ延長する延長部を有する加振装置によって解決する。   To solve the above problems, the present invention includes a support portion, a conductor plate, a plate-like piezoelectric element, and a weight, and both end portions in the longitudinal direction of the conductor plate are supported by the support portion. The weight is fixed to the center of the surface, the piezoelectric element is fixed to the center of the second main surface of the conductor plate, and the first main surface side or the center of the conductor plate, or This is solved by a vibration exciter having an extension extending to the second main surface side.

なお、前記延長部は前記導体板の中央部の前記長手方向に対して直交する幅方向の両端部に設けた突出部をそれぞれ折り曲げることにより前記第２の主面側に設けられたものであることが望ましい。   In addition, the said extension part is provided in the said 2nd main surface side by bending the protrusion part provided in the both ends of the width direction orthogonal to the said longitudinal direction of the center part of the said conductor board, respectively. It is desirable.

また、前記延長部は前記第２の主面側に設けられ、前記圧電素子の厚み方向よりはみ出すよう設けられていることが望ましい。   Further, it is preferable that the extension portion is provided on the second main surface side so as to protrude from the thickness direction of the piezoelectric element.

また、前記導体板の長手方向に沿った前記延長部の幅は、前記錘と前記導体板の接続部の幅よりも広いことが望ましい。   Moreover, it is preferable that the width of the extension portion along the longitudinal direction of the conductor plate is wider than the width of the connection portion between the weight and the conductor plate.

また、さらに第１の制限部と、第２の制限部を備え、前記錘の変位の上限は、前記第１の制限部により制限され、さらに前記延長部の先端の変位の上限は、前記第２の制限部により制限されることで、前記圧電素子の変形する範囲が制限されていることが望ましい。   Furthermore, a first limiting portion and a second limiting portion are further provided, the upper limit of the displacement of the weight is limited by the first limiting portion, and the upper limit of the displacement of the tip of the extension portion is the first limit It is desirable that the range of deformation of the piezoelectric element is restricted by being restricted by the restriction part 2.

また、前記支持部が弾性体であることが望ましい。   Further, it is desirable that the support portion is an elastic body.

本発明によって、加振装置における圧電素子を衝撃力から保護することができる。   According to the present invention, the piezoelectric element in the vibration exciter can be protected from impact force.

本発明における加振装置の実施形態の一例を示し、（ａ）は斜視図、（ｂ）は側面図、（ｃ）は正面図である。An example of embodiment of the vibration apparatus in this invention is shown, (a) is a perspective view, (b) is a side view, (c) is a front view. 本発明における実施形態１の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 1 in this invention, and has shown the cross section of the AA in FIG.1 (b). 本発明における実施形態１の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 1 in this invention, and has shown the cross section of the BB line in FIG.1 (c). 本発明における実施形態２の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 2 in this invention, and has shown the cross section of the AA in FIG.1 (b). 本発明における実施形態２の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 2 in this invention, and has shown the cross section of the BB line in FIG.1 (c). 本発明における実施形態３の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 3 in this invention, and has shown the cross section of the AA line in FIG.1 (b). 本発明における実施形態３の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 3 in this invention, and has shown the cross section of the BB line in FIG.1 (c). 本発明における実施形態４の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 4 in this invention, and has shown the cross section of the AA line in FIG.1 (b). 本発明における実施形態４の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。It is sectional drawing which shows the vibration apparatus of Embodiment 4 in this invention, and has shown the cross section of the BB line in FIG.1 (c).

図１は本発明における加振装置の実施形態の一例を示し、（ａ）は斜視図、（ｂ）は側面図、（ｃ）は正面図である。   FIG. 1 shows an example of an embodiment of a vibration device according to the present invention, where (a) is a perspective view, (b) is a side view, and (c) is a front view.

加振装置１は、図示されない駆動電極と共に回路基板１０に接続され、固定されている。   The vibration device 1 is connected and fixed to the circuit board 10 together with a drive electrode (not shown).

加振装置１を駆動すると、図示されない圧電素子により加振装置１内部の図示されない錘が振動し、回路基板１０に慣性力が伝播し、回路基板１０及び付属する筐体等が振動する。   When the vibration device 1 is driven, a weight (not shown) inside the vibration device 1 is vibrated by a piezoelectric element (not shown), an inertial force is propagated to the circuit board 10, and the circuit board 10 and an attached housing are vibrated.

回路基板１０を含む携帯機器を構成すれば、携帯機器が振動し、使用者に振動を知覚させることができる。   If a portable device including the circuit board 10 is configured, the portable device vibrates, and the user can perceive the vibration.

加振装置１による振動を回路基板１０を介して快適に使用者へ与える上では、振動の周波数は、騒音を不快に感じない３００Ｈｚ以下が望ましく、騒音がほとんど聞き取れない１００Ｈｚ以下、あるいは騒音がより聞き取れない２０Ｈｚ以下（０を含まず）であればなお望ましい。   In order to comfortably give vibration to the user through the circuit board 10 by the vibration device 1, the frequency of vibration is preferably 300 Hz or less at which noise is not uncomfortable, 100 Hz or less at which noise is hardly audible, or more It is still desirable if it is 20 Hz or less (not including 0) that cannot be heard.

加振装置１内部の構造について、以下に具体的な実施形態を例示する。   Specific embodiments of the internal structure of the vibration exciter 1 are illustrated below.

（実施形態１）
図２は、本発明における実施形態１の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。 (Embodiment 1)
FIG. 2 is a cross-sectional view showing the vibration exciter according to Embodiment 1 of the present invention, and shows a cross section taken along line AA in FIG.

加振装置１内壁には支持部２１、２２、２３、２４が固定され、導体板３は長手方向両端部を支持部２１乃至２４により支持されている。   Support portions 21, 22, 23, and 24 are fixed to the inner wall of the vibration exciter 1, and the conductor plate 3 is supported by the support portions 21 to 24 at both ends in the longitudinal direction.

ここで支持部２１乃至２４は、圧電素子６に対する衝撃力を吸収するため、シリコーン樹脂等の弾性体とすることが望ましい。なお、支持部２１乃至２４を弾性体とすることで、圧電素子６の駆動時における振動のＱが下がるため、加振装置内の圧電素子６が共振することを防ぎ、圧電素子６への駆動信号を停止した後に圧電素子６が停止するまでの応答時間を短縮することができる。   Here, it is desirable that the support portions 21 to 24 be elastic bodies such as silicone resin in order to absorb the impact force to the piezoelectric element 6. Since the support portions 21 to 24 are made of an elastic body, the vibration Q when the piezoelectric element 6 is driven is lowered, so that the piezoelectric element 6 in the vibration exciting device is prevented from resonating and driven to the piezoelectric element 6. The response time until the piezoelectric element 6 stops after stopping the signal can be shortened.

導体板３の一方の主面の中央には接続部４を介して錘５が固定され、他方の主面の中央には圧電素子６が固定されている。   A weight 5 is fixed to the center of one main surface of the conductor plate 3 via a connecting portion 4, and a piezoelectric element 6 is fixed to the center of the other main surface.

錘５は、中央部より端部に行くにつれて静止時の導体板３から離れてゆく形状としているため、加振装置全体が薄型化した場合でも必要な慣性力を得るための錘５の重量を確保することができる。   Since the weight 5 is shaped so as to move away from the stationary conductor plate 3 as it goes from the center to the end, the weight of the weight 5 for obtaining the necessary inertial force even when the entire vibration exciter is thinned. Can be secured.

ここで、導電性接着剤により圧電素子６を導体板３へ固定することで、導体板３がそのまま圧電素子６の電極となり、余分なリード線を省略できるため、望ましい。   Here, fixing the piezoelectric element 6 to the conductor plate 3 with a conductive adhesive is desirable because the conductor plate 3 becomes an electrode of the piezoelectric element 6 as it is, and an unnecessary lead wire can be omitted.

なお、導体板３の中央にある延長部３１は、圧電素子６の取り付けられた面に向かって折り曲げられている。   The extension 31 at the center of the conductor plate 3 is bent toward the surface to which the piezoelectric element 6 is attached.

圧電素子６からリード線やフレキシブル基板により図示されない加振装置１の外部電極へ駆動電極を導出し、回路基板からの電圧信号により圧電素子６を屈曲振動させることで、加振装置１より慣性力が発生する。   A drive electrode is led out from the piezoelectric element 6 to an external electrode of the vibration apparatus 1 (not shown) by a lead wire or a flexible substrate, and the piezoelectric element 6 is bent and vibrated by a voltage signal from the circuit board. Will occur.

すなわち、圧電素子６への交流等の時間変化する電圧を印加することにより、圧電素子６は屈曲振動を起こし、導体板３と錘５が振動する。この際、錘５の慣性力が導体板３、支持部２１乃至２４を介して加振装置１を取り付けた回路基板等に伝達され、回路基板等を振動させることができる。   That is, by applying a time-varying voltage such as alternating current to the piezoelectric element 6, the piezoelectric element 6 causes bending vibration, and the conductor plate 3 and the weight 5 vibrate. At this time, the inertial force of the weight 5 is transmitted to the circuit board to which the vibration exciter 1 is attached via the conductor plate 3 and the support portions 21 to 24, and the circuit board and the like can be vibrated.

ここで、錘５の振動変位は制限部１１により制限され、延長部３１先端の振動変位は制限部１２により制限されている。従って、圧電素子６の強度の限界を超すような屈曲を起こさないよう、制限部１１、１２により振動変位を制限することが可能となる。   Here, the vibration displacement of the weight 5 is restricted by the restriction part 11, and the vibration displacement at the tip of the extension part 31 is restricted by the restriction part 12. Accordingly, it is possible to limit the vibration displacement by the limiting portions 11 and 12 so as not to cause bending that exceeds the limit of the strength of the piezoelectric element 6.

また、延長部３１の長手方向に沿った幅を接続部４の幅よりも広くすることで、延長部３１の剛性により、導体板３の振動変位をさらに制限することもできる。   Further, by making the width of the extension portion 31 along the longitudinal direction wider than the width of the connection portion 4, the vibration displacement of the conductor plate 3 can be further limited by the rigidity of the extension portion 31.

図３は、本発明における実施形態１の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。   FIG. 3 is a cross-sectional view showing the vibration exciter according to Embodiment 1 of the present invention, and shows a cross section taken along line BB in FIG.

延長部３１は、導体板３の中央部断面における両端に設けられているが、このように導体板３を面対称な構成とすることで、圧電素子６により駆動される振動モードが安定化することができるため、望ましい。   The extension portions 31 are provided at both ends of the cross section of the central portion of the conductor plate 3, but the vibration mode driven by the piezoelectric element 6 is stabilized by making the conductor plate 3 symmetrical in this way. This is desirable because it can.

なお、延長部３１を、導体板３の中央部断面における片端のみに設けても良い。   The extension 31 may be provided only at one end in the cross section of the central portion of the conductor plate 3.

すなわち本発明は、支持部２１乃至２４と、導体板３と、平板状の圧電素子６と、錘５を備え、導体板３の長手方向両端部は支持部２１乃至２４により支持され、導体板３における第１の主面の中央部には錘５が固定され、導体板３における第２の主面の中央部には圧電素子６が固定され、導体板３の中央部には第１の主面側、または第２の主面側へ延長する延長部３１を有する加振装置の実施形態を取り得る。   That is, the present invention includes support portions 21 to 24, a conductor plate 3, a plate-like piezoelectric element 6, and a weight 5, and both ends in the longitudinal direction of the conductor plate 3 are supported by the support portions 21 to 24. The weight 5 is fixed to the center of the first main surface 3, the piezoelectric element 6 is fixed to the center of the second main surface of the conductor plate 3, and the first portion is connected to the center of the conductor plate 3. The embodiment of the vibration device having the extension 31 extending to the main surface side or the second main surface side can be taken.

延長部３１により圧電素子６の変形が制限されるため、強度の限界を超すような屈曲が起きることを防ぐことができる。   Since the deformation of the piezoelectric element 6 is limited by the extension portion 31, it is possible to prevent bending that exceeds the limit of strength.

また、本発明は、延長部３１は導体板３の中央部の長手方向に対して直交する幅方向の両端部に設けた突出部をそれぞれ折り曲げることにより第２の主面側に設けられた加振装置の実施形態を取り得る。   Further, according to the present invention, the extension portion 31 is provided on the second main surface side by bending the protruding portions provided at both end portions in the width direction orthogonal to the longitudinal direction of the central portion of the conductor plate 3. Embodiments of the vibration device can be taken.

延長部３１を、導体板３を折り曲げる簡単な工程で作成することができ、そもそも導体板３と一体化されていることから、導体板３との接合部の強度を確保することができる。   The extension portion 31 can be formed by a simple process of bending the conductor plate 3 and is integrated with the conductor plate 3 in the first place, so that the strength of the joint portion with the conductor plate 3 can be ensured.

また、本発明は、延長部３１は第２の主面側に設けられ、圧電素子６の厚み方向よりはみ出すよう設けられている加振装置の実施形態を取り得る。   Further, the present invention can take an embodiment of a vibration device in which the extension portion 31 is provided on the second main surface side and is provided so as to protrude from the thickness direction of the piezoelectric element 6.

上記構成とすることで、圧電素子６が加振装置１の内壁に衝突することを防ぎ、圧電素子６の保護を確実に行うことができる。   By setting it as the said structure, it can prevent that the piezoelectric element 6 collides with the inner wall of the vibration apparatus 1, and can protect the piezoelectric element 6 reliably.

また、本発明は、導体板３の長手方向に沿った延長部３１の幅は、錘５と導体板３の接続部４の幅よりも広い加振装置の実施形態を取り得る。   Further, the present invention can take an embodiment of a vibration exciter in which the width of the extension portion 31 along the longitudinal direction of the conductor plate 3 is wider than the width of the connection portion 4 between the weight 5 and the conductor plate 3.

上記構成とすることで、延長部３１の剛性により、導体板３の振動変位をさらに制限し、圧電素子６の保護を確実に行うことができる。   With the above configuration, the vibration displacement of the conductor plate 3 can be further limited by the rigidity of the extension portion 31, and the piezoelectric element 6 can be reliably protected.

（実施形態２）
図４は、本発明における実施形態２の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。 (Embodiment 2)
FIG. 4 is a cross-sectional view showing the vibration exciter according to Embodiment 2 of the present invention, and shows a cross section taken along line AA in FIG.

実施形態１における図２とは、延長部３１の長手方向に沿った幅が接続部４の幅よりも狭く、弾性体１１１、１２１を制限部１１、１２の中央部に配している点で異なる。   2 in Embodiment 1 is that the width of the extension portion 31 along the longitudinal direction is narrower than the width of the connection portion 4, and the elastic bodies 111 and 121 are arranged at the central portions of the restriction portions 11 and 12. Different.

本実施形態は、延長部３１の長手方向に沿った幅が接続部４の幅よりも狭くすることで、導体板３の制限範囲内での振動力を高め、ひいては加振装置としての慣性力を高めることができる。   In this embodiment, the width along the longitudinal direction of the extension portion 31 is narrower than the width of the connection portion 4, thereby increasing the vibration force within the limited range of the conductor plate 3, and consequently the inertial force as a vibration device. Can be increased.

この際、接続部４の剛性により導体板３の振動を制限しないよう、接続部４をシリコーン樹脂等の弾性体とすることが望ましい。   At this time, it is desirable that the connection portion 4 is made of an elastic body such as silicone resin so that the vibration of the conductor plate 3 is not limited by the rigidity of the connection portion 4.

図５は、本発明における実施形態２の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。   FIG. 5 is a cross-sectional view showing the vibration exciter according to Embodiment 2 of the present invention, and shows a cross section taken along line BB in FIG.

実施形態１と異なり、錘５の振動変位は制限部１１上の弾性体１１１により制限され、延長部３１先端の振動変位は制限部１２上の弾性体１２１により制限されている。   Unlike the first embodiment, the vibration displacement of the weight 5 is limited by the elastic body 111 on the limiting portion 11, and the vibration displacement at the tip of the extension portion 31 is limited by the elastic body 121 on the limiting portion 12.

従って、錘５と延長部３１先端が制限部１１、１２と直接衝突することはなく、圧電素子６への衝撃を緩和することができる。   Accordingly, the weight 5 and the tip of the extension part 31 do not directly collide with the restriction parts 11 and 12, and the impact on the piezoelectric element 6 can be reduced.

（実施形態３）
図６は、本発明における実施形態３の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。 (Embodiment 3)
FIG. 6 is a cross-sectional view showing the vibration exciter according to Embodiment 3 of the present invention, and shows a cross section taken along line AA in FIG.

実施形態１における図２とは、導体板３の中央にある延長部３１が、錘５の取り付けられた面に向かって折り曲げられている点で異なっている。   2 differs from FIG. 2 in the first embodiment in that the extension 31 at the center of the conductor plate 3 is bent toward the surface to which the weight 5 is attached.

このように構成しても、延長部３１の剛性により導体板３の振動変位を制限することができる。   Even if comprised in this way, the vibration displacement of the conductor plate 3 can be restrict | limited by the rigidity of the extension part 31. FIG.

図７は、本発明における実施形態３の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。   FIG. 7 is a cross-sectional view showing the vibration exciter according to Embodiment 3 of the present invention, and shows a cross section taken along line BB in FIG.

錘５は、接続部４を介して導体板３の中央に固定されている。   The weight 5 is fixed to the center of the conductor plate 3 via the connection portion 4.

本実施形態は、延長部３１の分だけ実施形態１よりも薄型化できる点で優れている。   The present embodiment is superior in that it can be made thinner than the first embodiment by the extension portion 31.

（実施形態４）
図８は、本発明における実施形態４の加振装置を示す断面図であり、図１（ｂ）におけるＡ−Ａ線の断面を示している。 (Embodiment 4)
FIG. 8 is a cross-sectional view showing the vibration exciter according to Embodiment 4 of the present invention, and shows a cross section taken along line AA in FIG.

実施形態３における図６とは、圧電素子６の主面における２つの両面に弾性体７１、７２を介して２つの導体板３、３２、さらに接続部４１、４２を介して２つの錘５１、５２とを配している点が異なる。   FIG. 6 in the third embodiment differs from FIG. 6 in that the two main surfaces of the piezoelectric element 6 are two conductor plates 3 and 32 via elastic bodies 71 and 72, and two weights 51 are connected via connection portions 41 and 42. 52 is different.

また、２つの導体板３、３２の間に支持部２５、２６を追加している。   Further, support portions 25 and 26 are added between the two conductor plates 3 and 32.

図９は、本発明における実施形態４の加振装置を示す断面図であり、図１（ｃ）におけるＢ−Ｂ線の断面を示している。   FIG. 9 is a cross-sectional view showing the vibration exciter according to Embodiment 4 of the present invention, and shows a cross section taken along line BB in FIG.

加振装置１に衝撃力が加わった場合には、延長部３１、３３、さらには弾性体７１、７２により圧電素子６への衝撃が実施形態３よりも緩和される。   When an impact force is applied to the vibration device 1, the impact on the piezoelectric element 6 is mitigated by the extensions 31 and 33 and the elastic bodies 71 and 72 as compared with the third embodiment.

１ 加振装置
１０ 回路基板
１１、１２ 制限部
２１、２２、２３、２４、２５、２６ 支持部
３、３２ 導体板
３１、３３ 延長部
４、４１、４２ 接続部
５、５１、５２ 錘
６ 圧電素子
１１１、１２１、７１、７２ 弾性体 DESCRIPTION OF SYMBOLS 1 Excitation apparatus 10 Circuit board 11, 12 Restriction part 21,22,23,24,25,26 Support part 3,32 Conductor plate 31,33 Extension part 4,41,42 Connection part 5,51,52 Weight 6 Piezoelectric Element 111, 121, 71, 72 Elastic body

Claims (6)

支持部と、
導体板と、
平板状の圧電素子と、
錘を備え、
前記導体板の長手方向両端部は前記支持部により支持され、
前記導体板における第１の主面の中央部には前記錘が固定され、
前記導体板における第２の主面の中央部には前記圧電素子が固定され、
前記導体板の中央部には前記第１の主面側、または前記第２の主面側へ延長する延長部を有することを特徴とする加振装置。 A support part;
A conductor plate;
A plate-like piezoelectric element;
With a weight,
Both longitudinal ends of the conductor plate are supported by the support portion,
The weight is fixed to the central portion of the first main surface of the conductor plate,
The piezoelectric element is fixed to a central portion of the second main surface of the conductor plate,
The vibration device according to claim 1, wherein an extension portion extending toward the first main surface side or the second main surface side is provided at a central portion of the conductor plate. 前記延長部は前記導体板の中央部の前記長手方向に対して直交する幅方向の両端部に設けた突出部をそれぞれ折り曲げることにより前記第２の主面側に設けられたものであることを特徴とする請求項１に記載の加振装置。   The extension portion is provided on the second main surface side by bending the protruding portions provided at both ends in the width direction orthogonal to the longitudinal direction of the central portion of the conductor plate. 2. The vibration device according to claim 1, wherein 前記延長部は前記第２の主面側に設けられ、前記圧電素子の厚み方向よりはみ出すよう設けられていることを特徴とする請求項１または請求項２に記載の加振装置。   The vibration device according to claim 1, wherein the extension portion is provided on the second main surface side and is provided so as to protrude from a thickness direction of the piezoelectric element. 前記導体板の長手方向に沿った前記延長部の幅は、前記錘と前記導体板の接続部の幅よりも広いことを特徴とする請求項１から請求項３のいずれかに記載の加振装置。   4. The excitation according to claim 1, wherein a width of the extension along the longitudinal direction of the conductor plate is wider than a width of a connection portion between the weight and the conductor plate. 5. apparatus. さらに第１の制限部と、
第２の制限部を備え、
前記錘の変位の上限は、前記第１の制限部により制限され、
さらに前記延長部の先端の変位の上限は、前記第２の制限部により制限されることで、
前記圧電素子の変形する範囲が制限されていることを特徴とする請求項１から請求項４のいずれかに記載の加振装置。 A first restriction unit;
A second restriction unit,
The upper limit of the displacement of the weight is limited by the first limiting unit,
Furthermore, the upper limit of the displacement of the tip of the extension is restricted by the second restriction part,
The vibration device according to claim 1, wherein a deformation range of the piezoelectric element is limited. 前記支持部が弾性体であることを特徴とする請求項１から請求項５のいずれかに記載の加振装置。   The vibration device according to claim 1, wherein the support portion is an elastic body.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000140759A (en) * 1998-11-09 2000-05-23 Matsushita Electric Ind Co Ltd Piezoelectric actuator and piezoelectric vibrator
JP2001077439A (en) * 1999-09-08 2001-03-23 Toko Inc Piezoelectric transformer
JP2005045691A (en) * 2003-07-24 2005-02-17 Taiyo Yuden Co Ltd Piezoelectric vibrator
JP2005303937A (en) * 2004-04-16 2005-10-27 Sony Corp Supporting structure of piezoelectric bimorph element
JP2010152888A (en) * 2008-12-23 2010-07-08 Research In Motion Ltd Portable electronic device and method of control
JP2013134776A (en) * 2011-12-26 2013-07-08 Samsung Electro-Mechanics Co Ltd Haptic feedback device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000140759A (en) * 1998-11-09 2000-05-23 Matsushita Electric Ind Co Ltd Piezoelectric actuator and piezoelectric vibrator
JP2001077439A (en) * 1999-09-08 2001-03-23 Toko Inc Piezoelectric transformer
JP2005045691A (en) * 2003-07-24 2005-02-17 Taiyo Yuden Co Ltd Piezoelectric vibrator
JP2005303937A (en) * 2004-04-16 2005-10-27 Sony Corp Supporting structure of piezoelectric bimorph element
JP2010152888A (en) * 2008-12-23 2010-07-08 Research In Motion Ltd Portable electronic device and method of control
JP2013134776A (en) * 2011-12-26 2013-07-08 Samsung Electro-Mechanics Co Ltd Haptic feedback device

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