JP3798647B2 - Piezoelectric speaker - Google Patents

Piezoelectric speaker Download PDF

Info

Publication number
JP3798647B2
JP3798647B2 JP2001130910A JP2001130910A JP3798647B2 JP 3798647 B2 JP3798647 B2 JP 3798647B2 JP 2001130910 A JP2001130910 A JP 2001130910A JP 2001130910 A JP2001130910 A JP 2001130910A JP 3798647 B2 JP3798647 B2 JP 3798647B2
Authority
JP
Japan
Prior art keywords
panel
piezoelectric element
piezoelectric
dimension
longitudinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2001130910A
Other languages
Japanese (ja)
Other versions
JP2002330496A (en
Inventor
純一 早川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kenwood KK
Original Assignee
Kenwood KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kenwood KK filed Critical Kenwood KK
Priority to JP2001130910A priority Critical patent/JP3798647B2/en
Publication of JP2002330496A publication Critical patent/JP2002330496A/en
Application granted granted Critical
Publication of JP3798647B2 publication Critical patent/JP3798647B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Description

【０００１】
【発明の属する技術分野】
本発明は圧電型スピーカに関する。
【０００２】
【従来の技術】
従来、圧電型スピーカは、図４（Ａ）に示すように、圧電素子２を基材となる金属板３に固定し、同図（Ｂ）または同図（Ｃ）に示すような極性で電圧を掛け発音させていた。
または、金属板３を含む圧電素子を、より大きい樹脂板等に貼り付けて発音させていた。
【０００３】
【発明が解決しようとする課題】
前述のような構造において、金属板３や樹脂板の大きさは特に取り付ける場所の制約等で定められでおり、圧電素子の大きさとの関係は特に考慮はされていなかった。そのため、従来の圧電型スピーカは、圧電素子の動きを最大限活かしたものとは言えなかった。
本発明の目的は、上記従来技術の欠点を解消し、圧電素子の動きを最大限活かしたものと言える圧電型スピーカを実現することにある。
【０００４】
【課題を解決するための手段】
上記目的達成のため請求項１の発明では、圧電素子をパネルに貼り付けた圧電型スピーカにおいて、圧電素子およびパネルは長方形であり、該圧電素子は該パネルの長手方向の端に該圧電素子の長手方向が該パネルの短手方向の辺に沿うように貼り付けられており、該パネルの長手方向の寸法は、該圧電素子の短手方向の幅の奇数倍とされている（なお、「長い方」が「長手」と称されるから、本明細書では、「短い方」を「短手」と称する。）。
また、請求項２の発明では、請求項１にいうパネルの長手方向の寸法が、請求項１にいう圧電素子の短手方向の幅の３倍から９倍までの間の奇数倍とされている。
【０００５】
また請求項３の発明では、圧電素子をパネルに貼り付けた圧電型スピーカにおいて、圧電素子およびパネルは長方形であり、該圧電素子は該パネルの短手方向の端に該圧電素子の長手方向が該パネルの長手方向の辺に沿うように貼り付けられており、該パネルの長手方向の寸法は、該圧電素子の長手方向の幅の奇数倍とされており、該パネルの短手方向の寸法は、該圧電素子の短手方向の幅の奇数倍とされている。
また請求項４の発明では、請求項３にいうパネルの長手方向の寸法が、請求項３にいう圧電素子の長手方向の幅の３倍か５倍の奇数倍とされており、該パネルの短手方向の寸法が、該圧電素子の短手方向の幅の３倍から９倍までの間の奇数倍とされている。
【０００６】
また、請求項５の発明では、圧電素子をパネルに貼り付けた圧電型スピーカにおいて、圧電素子およびパネルは長方形であり、該圧電素子は該パネルの中心付近に該圧電素子の長手方向と該パネルの長手方向が同方向になるように貼り付けられており、該パネルの長手方向の寸法は、該圧電素子の長手方向の幅の奇数倍とされており、該パネルの短手方向の寸法は、該圧電素子の短手方向の幅の奇数倍とされている。
また請求項６の発明では、請求項５にいうパネルの長手方向の寸法が、該圧電素子の長手方向の幅の３倍か５倍の奇数倍とされ、請求項５にいうパネルの短手方向の寸法が、前記圧電素子の短手方向の幅の１倍から５倍までの間の奇数倍とされている。
【０００７】
【発明の実施の形態】
以下、本発明の詳細を図示実施の形態例に基いて説明する。第１の実施の形態例を図１に示す。この実施の形態例は、請求項１又は請求項２の発明の一実施の形態例に当たる。
圧電素子１及びパネル２は長方形であり、圧電素子１はほぼ同じ大きさの金属板に貼り付けられている。それと同時に、圧電素子１の長手方向がパネル２の短手方向の辺に沿うように、ここではパネル２の左端に貼り付けられている。このとき圧電素子１の厚さは５０μ、金属板の厚さも５０μ、パネル２の厚さは３００μである。パネル２の材料はポリプロピレンで、パネル２の長辺の寸法は７０ｍｍ、圧電素子１の短辺寸法は１０ｍｍである。即ちパネル２の長辺の寸法は、圧電素子１の短辺寸法の７倍に設定されている。
【０００８】
このように、圧電素子１およびパネル２を長方形にして、その大きさを請求項１又は請求項２に言うが如く規定すると次のような作用がある。すなわち、圧電素子１の基本振動としては、図４の（Ｂ）、（Ｃ）のように圧電素子１全体の屈曲振動があり、これは長手方向、短手方向ともに基本振動として現れる。
この基本振動をきちんと再生することで、圧電素子１の振動を最大限活かすことができる。そのためには、貼り付けるパネル２の寸法を、圧電素子１の基本振動が奇数回乗るような寸法にすると良い。これにより、パネル２自体も共振しやすくなり、大きな音が出せるようになる。
もし、この時パネル２の寸法が基本振動が偶数回乗るような寸法になっていると、この時もパネル２は共振しやすいが、位相の逆な振動が同じだけ生じるために音を打ち消してしまい、音は出にくくなる。
なお、このような作用は、後述の第２の実施の形態例によって説明される請求項３又は請求項４にいう発明、或いは第３の実施の形態例によって説明される請求項５又は請求項６の発明に関しても同様である。
【０００９】
なお、倍率としては、パネル２の長手方向の寸法が、圧電素子１の短手方向の幅の３倍から９倍までの間の奇数倍、即ち、３倍、５倍、７倍、９倍の何れかとするのが好ましい。
【００１０】
この第１の実施の形態例の圧電スピーカの特性を図５に示す。４ｋＨｚ付近にピークがあり、この周波数が圧電素子の幅で決まる共振周波数であると考えられる。確認のため、パネル２をカットして、６倍の長さにして特性を見ると、図６に示されるように４ｋＨｚ付近はディッブとなっており、打ち消し合いが起きていることが確認できた。
【００１１】
第２の実施の形態例を図２に示す。この実施の形態例は、請求項３又は請求項４の発明の一実施の形態例に当たる。
ここでも、圧電素子１及びパネル２は長方形であり、圧電素子１はほぼ同じ大きさの金属板に貼り付けられている。それと同時に、圧電素子１はパネル２の短手方向の端に圧電素子１の長手方向がパネル２の長手方向の辺に沿うように、ここでは、パネル２の右下端に横方向に貼り付けられている。なお、圧電素子１の厚さ、金属板の厚さ、及びパネル２の厚さと材料は、第１の実施の形態例と同じである。
パネル２の長辺の寸法は１２０ｍｍ、短辺の寸法は７０ｍｍ、圧電素子１の長辺の寸法は４０ｍｍ、短辺の寸法は１０ｍｍである。即ちパネル２の長辺の寸法は、圧電素子１の長辺寸法の３倍に、パネル２の短辺の寸法は圧電素子１の短辺寸法の７倍に設定されている。
【００１２】
なお、倍率としては、パネル２の長手方向の寸法が、前記圧電素子１の長手方向の幅の３倍か５倍の奇数倍とされており、該パネルの短手方向の寸法が、該圧電素子の短手方向の幅の３倍から９倍までの間の奇数倍とするのが好ましい。
【００１３】
第３の実施の形態例を図３に示す。この実施の形態例は、請求項５又は請求項６の発明の一実施の形態例に当たる。
ここでも圧電素子１及びパネル２は長方形であり、圧電素子１はほぼ同じ大きさの金属板に貼り付けられている。それと同時に、圧電素子１はパネル２の中心付近に圧電素子１の長手方向とパネル２の長手方向が同方向になるように、パネル２に貼り付けられている。なお、圧電素子１の厚さ、金属板の厚さ、及びパネル２の厚さと材料は、第１の実施の形態例と同じである。
パネル２の長辺の寸法は１５０ｍｍ、短辺の寸法は５４ｍｍ、圧電素子１の長辺の寸法は５０ｍｍ、短辺の寸法は１８ｍｍである。即ちパネル２の長辺の寸法は、圧電素子１の長辺の寸法の３倍に、またパネル２の短辺寸法は圧電素子１の短辺寸法の３倍に設定されている。
【００１４】
なお、倍率としては、パネル２の長手方向の寸法が、圧電素子１の長手方向の幅の３倍か５倍の奇数倍とされ、該パネルの短手方向の寸法が、前記圧電素子１の短手方向の幅の１倍から５倍までの間の奇数倍、即ち、１倍、３倍、５倍の何れかとするのが好ましい。
【００１５】
【発明の効果】
以上説明したように、本願各発明では、圧電素子およびパネルを長方形にして、これらの辺の長さを奇数倍の関係とした。従って、圧電素子の基本振動をパネルの振動としてきちんと再生することができ、圧電素子の振動を最大限活かしたものとすることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態例を示す正面図。
【図２】本発明の第２の実施の形態例を示す正面図。
【図３】本発明の第３の実施の形態例を示す正面図。
【図４】圧電型スピーカの基本原理を示す側面図で、（Ａ）は電圧を印加しない状態（断面で示す）、（Ｂ）は、圧電素子側に＋の電圧を印加した状態、（Ｃ）は、圧電素子側に−の電圧を印加した状態を示す。
【図５】本発明の第１の実施の形態例の周波数特性を示すグラフ。
【図６】本発明の第１の実施の形態例でパネル２の長辺の長さを圧電素子１の短辺の６倍の長さにカットした場合の周波数特性を示すグラフ。
【符号の説明】
１…圧電素子 ２…パネル
３…金属板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a piezoelectric speaker.
[0002]
[Prior art]
Conventionally, as shown in FIG. 4A, a piezoelectric speaker has a piezoelectric element 2 fixed to a metal plate 3 as a base material, and has a voltage with a polarity as shown in FIG. 4B or FIG. The sound was multiplied.
Alternatively, the piezoelectric element including the metal plate 3 is affixed to a larger resin plate or the like to generate sound.
[0003]
[Problems to be solved by the invention]
In the structure as described above, the size of the metal plate 3 and the resin plate is determined by the restriction of the mounting location, and the relationship with the size of the piezoelectric element is not particularly considered. For this reason, the conventional piezoelectric speaker cannot be said to take full advantage of the movement of the piezoelectric element.
An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to realize a piezoelectric speaker that can be said to make the most of the movement of the piezoelectric element.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, in the piezoelectric type speaker in which the piezoelectric element is attached to the panel, the piezoelectric element and the panel are rectangular, and the piezoelectric element is arranged at the longitudinal end of the panel. The panel is pasted so that the longitudinal direction is along the side in the short direction of the panel, and the dimension in the longitudinal direction of the panel is an odd multiple of the width in the short direction of the piezoelectric element ( Since the “longer one” is referred to as the “longitudinal”, the “shorter one” is referred to as the “shorter” in this specification.)
In the invention of claim 2, the longitudinal dimension of the panel according to claim 1 is an odd multiple between 3 and 9 times the width of the piezoelectric element according to claim 1 in the short direction. Yes.
[0005]
According to a third aspect of the present invention, in the piezoelectric speaker in which the piezoelectric element is attached to the panel, the piezoelectric element and the panel are rectangular, and the piezoelectric element has a longitudinal direction of the piezoelectric element at an end in a short direction of the panel. Along the side in the longitudinal direction of the panel, the longitudinal dimension of the panel is an odd multiple of the longitudinal width of the piezoelectric element, and the lateral dimension of the panel Is an odd multiple of the width in the short direction of the piezoelectric element.
According to the invention of claim 4, the longitudinal dimension of the panel according to claim 3 is an odd multiple of 3 or 5 times the width of the piezoelectric element according to claim 3. The dimension in the short direction is an odd multiple of 3 to 9 times the width in the short direction of the piezoelectric element.
[0006]
According to a fifth aspect of the present invention, in the piezoelectric type speaker in which the piezoelectric element is bonded to the panel, the piezoelectric element and the panel are rectangular, and the piezoelectric element is disposed in the longitudinal direction of the piezoelectric element near the center of the panel and the panel. The longitudinal dimension of the panel is an odd multiple of the longitudinal width of the piezoelectric element, and the lateral dimension of the panel is The width of the piezoelectric element is an odd multiple of the width in the short direction.
In the invention of claim 6, the longitudinal dimension of the panel according to claim 5 is an odd multiple of 3 or 5 times the longitudinal width of the piezoelectric element. The dimension in the direction is an odd multiple of 1 to 5 times the width of the piezoelectric element in the short direction.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The details of the present invention will be described below based on the embodiments shown in the drawings. A first embodiment is shown in FIG. This embodiment corresponds to an embodiment of the invention of claim 1 or claim 2.
The piezoelectric element 1 and the panel 2 are rectangular, and the piezoelectric element 1 is attached to a metal plate having almost the same size. At the same time, the piezoelectric element 1 is affixed to the left end of the panel 2 so that the longitudinal direction of the piezoelectric element 1 is along the side of the panel 2 in the short direction. At this time, the thickness of the piezoelectric element 1 is 50 μ, the thickness of the metal plate is 50 μ, and the thickness of the panel 2 is 300 μ. The material of the panel 2 is polypropylene, the long side dimension of the panel 2 is 70 mm, and the short side dimension of the piezoelectric element 1 is 10 mm. That is, the long side dimension of the panel 2 is set to 7 times the short side dimension of the piezoelectric element 1.
[0008]
As described above, when the piezoelectric element 1 and the panel 2 are rectangular, and the size is defined as in the first or second aspect, the following effects are obtained. That is, as the basic vibration of the piezoelectric element 1, there are bending vibrations of the entire piezoelectric element 1 as shown in FIGS. 4B and 4C, which appear as basic vibrations in both the longitudinal direction and the lateral direction.
By properly reproducing this basic vibration, the vibration of the piezoelectric element 1 can be utilized to the maximum extent. For this purpose, the size of the panel 2 to be attached is preferably set such that the basic vibration of the piezoelectric element 1 rides an odd number of times. As a result, the panel 2 itself easily resonates, and a loud sound can be produced.
If the dimensions of the panel 2 are such that the basic vibrations are even times the number of times, the panel 2 is likely to resonate at this time. The sound is hard to come out.
Such an operation is described in claim 3 or claim 4 described by the second embodiment described later, or claim 5 or claim described by the third embodiment. The same applies to the sixth invention.
[0009]
In addition, as a magnification, the dimension in the longitudinal direction of the panel 2 is an odd multiple between 3 to 9 times the width in the short direction of the piezoelectric element 1, that is, 3 times, 5 times, 7 times, and 9 times. It is preferable to use either of them.
[0010]
FIG. 5 shows the characteristics of the piezoelectric speaker according to the first embodiment. There is a peak in the vicinity of 4 kHz, and this frequency is considered to be a resonance frequency determined by the width of the piezoelectric element. For confirmation, the panel 2 was cut to 6 times longer, and the characteristics were seen. As shown in FIG. 6, the vicinity of 4 kHz was a dib and it was confirmed that cancellations occurred. .
[0011]
A second embodiment is shown in FIG. This embodiment corresponds to an embodiment of the invention of claim 3 or claim 4.
Also here, the piezoelectric element 1 and the panel 2 are rectangular, and the piezoelectric element 1 is attached to a metal plate having substantially the same size. At the same time, the piezoelectric element 1 is affixed laterally to the lower right end of the panel 2 so that the longitudinal direction of the piezoelectric element 1 is along the side of the longitudinal direction of the panel 2 at the end of the panel 2 in the short direction. ing. Note that the thickness of the piezoelectric element 1, the thickness of the metal plate, and the thickness and material of the panel 2 are the same as those in the first embodiment.
The long side dimension of the panel 2 is 120 mm, the short side dimension is 70 mm, the long side dimension of the piezoelectric element 1 is 40 mm, and the short side dimension is 10 mm. That is, the long side dimension of the panel 2 is set to three times the long side dimension of the piezoelectric element 1, and the short side dimension of the panel 2 is set to seven times the short side dimension of the piezoelectric element 1.
[0012]
In addition, as a magnification, the dimension in the longitudinal direction of the panel 2 is an odd multiple of 3 or 5 times the width in the longitudinal direction of the piezoelectric element 1, and the dimension in the short direction of the panel is the piezoelectric dimension. It is preferably an odd multiple of 3 to 9 times the width in the short direction of the element.
[0013]
A third embodiment is shown in FIG. This embodiment corresponds to an embodiment of the invention of claim 5 or claim 6.
Also here, the piezoelectric element 1 and the panel 2 are rectangular, and the piezoelectric element 1 is attached to a metal plate having substantially the same size. At the same time, the piezoelectric element 1 is attached to the panel 2 near the center of the panel 2 so that the longitudinal direction of the piezoelectric element 1 and the longitudinal direction of the panel 2 are the same direction. Note that the thickness of the piezoelectric element 1, the thickness of the metal plate, and the thickness and material of the panel 2 are the same as those in the first embodiment.
The long side dimension of the panel 2 is 150 mm, the short side dimension is 54 mm, the long side dimension of the piezoelectric element 1 is 50 mm, and the short side dimension is 18 mm. That is, the long side dimension of the panel 2 is set to three times the long side dimension of the piezoelectric element 1, and the short side dimension of the panel 2 is set to three times the short side dimension of the piezoelectric element 1.
[0014]
In addition, as a magnification, the longitudinal dimension of the panel 2 is set to an odd multiple of 3 or 5 times the longitudinal width of the piezoelectric element 1, and the lateral dimension of the panel is equal to that of the piezoelectric element 1. It is preferable to set an odd number between 1 and 5 times the width in the short direction, that is, 1 time, 3 times, and 5 times.
[0015]
【The invention's effect】
As described above, in each invention of the present application, the piezoelectric element and the panel are rectangular, and the length of these sides is an odd multiple. Therefore, the fundamental vibration of the piezoelectric element can be reproduced properly as the vibration of the panel, and the vibration of the piezoelectric element can be fully utilized.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment of the present invention.
FIG. 2 is a front view showing a second embodiment of the present invention.
FIG. 3 is a front view showing a third embodiment of the present invention.
FIGS. 4A and 4B are side views showing the basic principle of a piezoelectric speaker, in which FIG. 4A shows a state where no voltage is applied (shown in cross section), FIG. 4B shows a state where a positive voltage is applied to the piezoelectric element side, ) Shows a state in which a negative voltage is applied to the piezoelectric element side.
FIG. 5 is a graph showing frequency characteristics of the first embodiment of the present invention.
6 is a graph showing frequency characteristics when the length of the long side of the panel 2 is cut to six times the length of the short side of the piezoelectric element 1 in the first embodiment of the present invention. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Piezoelectric element 2 ... Panel 3 ... Metal plate

Claims (6)

圧電素子をパネルに貼り付けた圧電型スピーカにおいて、圧電素子およびパネルは長方形であり、該圧電素子は該パネルの長手方向の端に該圧電素子の長手方向が該パネルの短手方向の辺に沿うように貼り付けられており、該パネルの長手方向の寸法は、該圧電素子の短手方向の幅の奇数倍とされていることを特徴とする圧電型スピーカ。In a piezoelectric speaker in which a piezoelectric element is attached to a panel, the piezoelectric element and the panel are rectangular, the piezoelectric element is at the longitudinal end of the panel, and the longitudinal direction of the piezoelectric element is at the short side of the panel. The piezoelectric speaker is characterized in that the size of the panel in the longitudinal direction is an odd multiple of the width of the piezoelectric element in the short direction. 前記パネルの長手方向の寸法が、前記圧電素子の短手方向の幅の３倍から９倍までの間の奇数倍とされていることを特徴とする請求項１に記載の圧電型スピーカ。2. The piezoelectric speaker according to claim 1, wherein the length of the panel in the longitudinal direction is an odd multiple of 3 to 9 times the width of the piezoelectric element in the short direction. 圧電素子をパネルに貼り付けた圧電型スピーカにおいて、圧電素子およびパネルは長方形であり、該圧電素子は該パネルの短手方向の端に該圧電素子の長手方向が該パネルの長手方向の辺に沿うように貼り付けられており、該パネルの長手方向の寸法は、該圧電素子の長手方向の幅の奇数倍とされており、該パネルの短手方向の寸法は、該圧電素子の短手方向の幅の奇数倍とされていることを特徴とする圧電型スピーカ。In a piezoelectric speaker in which a piezoelectric element is attached to a panel, the piezoelectric element and the panel are rectangular, and the piezoelectric element is at the end in the short direction of the panel and the longitudinal direction of the piezoelectric element is on the side in the longitudinal direction of the panel. The longitudinal dimension of the panel is an odd multiple of the longitudinal width of the piezoelectric element, and the lateral dimension of the panel is the short dimension of the piezoelectric element. A piezoelectric speaker characterized by being an odd multiple of the width in the direction. 前記パネルの長手方向の寸法が、前記圧電素子の長手方向の幅の３倍か５倍の奇数倍とされており、該パネルの短手方向の寸法が、該圧電素子の短手方向の幅の３倍から９倍までの間の奇数倍とされていることを特徴とする請求項３に記載の圧電型スピーカ。The longitudinal dimension of the panel is an odd multiple of 3 or 5 times the longitudinal width of the piezoelectric element, and the lateral dimension of the panel is the lateral width of the piezoelectric element. 4. The piezoelectric speaker according to claim 3, wherein the piezoelectric speaker is an odd multiple of 3 to 9 times. 圧電素子をパネルに貼り付けた圧電型スピーカにおいて、圧電素子およびパネルは長方形であり、該圧電素子は該パネルの中心付近に該圧電素子の長手方向と該パネルの長手方向が同方向になるように貼り付けられており、該パネルの長手方向の寸法は、該圧電素子の長手方向の幅の奇数倍とされており、該パネルの短手方向の寸法は、該圧電素子の短手方向の幅の奇数倍とされていることを特徴とする圧電型スピーカ。In a piezoelectric speaker in which a piezoelectric element is attached to a panel, the piezoelectric element and the panel are rectangular, and the piezoelectric element is located near the center of the panel so that the longitudinal direction of the piezoelectric element is the same as the longitudinal direction of the panel. The longitudinal dimension of the panel is an odd multiple of the longitudinal width of the piezoelectric element, and the lateral dimension of the panel is the lateral dimension of the piezoelectric element. A piezoelectric speaker characterized by being an odd multiple of the width. 前記パネルの長手方向の寸法が、該圧電素子の長手方向の幅の３倍か５倍の奇数倍とされ、該パネルの短手方向の寸法が、前記圧電素子の短手方向の幅の１倍から５倍までの間の奇数倍とされていることを特徴とする請求項５に記載の圧電型スピーカ。The longitudinal dimension of the panel is an odd multiple of 3 or 5 times the longitudinal width of the piezoelectric element, and the lateral dimension of the panel is 1 of the lateral width of the piezoelectric element. 6. The piezoelectric speaker according to claim 5, wherein the piezoelectric speaker is an odd multiple between double and five times.
JP2001130910A 2001-04-27 2001-04-27 Piezoelectric speaker Expired - Lifetime JP3798647B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001130910A JP3798647B2 (en) 2001-04-27 2001-04-27 Piezoelectric speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001130910A JP3798647B2 (en) 2001-04-27 2001-04-27 Piezoelectric speaker

Publications (2)

Publication Number Publication Date
JP2002330496A JP2002330496A (en) 2002-11-15
JP3798647B2 true JP3798647B2 (en) 2006-07-19

Family

ID=18979192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001130910A Expired - Lifetime JP3798647B2 (en) 2001-04-27 2001-04-27 Piezoelectric speaker

Country Status (1)

Country Link
JP (1) JP3798647B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012209866A (en) * 2011-03-30 2012-10-25 Kyocera Corp Acoustic generator
KR101487268B1 (en) * 2012-03-30 2015-01-28 쿄세라 코포레이션 Vibration device and portable terminal using the same
US9654880B2 (en) 2013-09-13 2017-05-16 Kyocera Corporation Sound generator and electronic device using the same
WO2018061320A1 (en) * 2016-09-28 2018-04-05 株式会社村田製作所 Piezoelectric sounding component

Also Published As

Publication number Publication date
JP2002330496A (en) 2002-11-15

Similar Documents

Publication Publication Date Title
JP4761459B2 (en) Piezoelectric vibration unit and piezoelectric speaker
US8208678B2 (en) Membrane or membrane configuration for an electrodynamic sound transducer, and loudspeaker comprising such a membrane or membrane configuration
JP2007180827A (en) Panel-type speaker
US20060291688A1 (en) Flat speaker
JP2006229647A (en) Acoustic vibrator for bone conduction
JPS61247198A (en) Dynamic transducer
WO2005004535A1 (en) Panel type speaker
JP3798647B2 (en) Piezoelectric speaker
KR20120011769A (en) Magnet plate and base frame structure of flat type speaker
US20010055403A1 (en) High frequency loudspeaker
JP5414419B2 (en) Ribbon microphone unit and ribbon microphone
JP3505999B2 (en) Electroacoustic transducer
JP5617069B2 (en) Speaker
JP2023520096A (en) Linear vibration actuator with moving coil and moving magnet
DE102013010654A1 (en) Bending wave loudspeaker
JP5927944B2 (en) Piezoelectric sounding device
JP3879283B2 (en) Speaker
JP4211155B2 (en) Piezoelectric tweeter
JPH0440930Y2 (en)
JP3148971B2 (en) Speaker diaphragm support structure
JPH11168795A (en) Electroacoustic transducer
JPS6241516Y2 (en)
JP2011130350A (en) Speaker
JPS6336791Y2 (en)
JP3200879B2 (en) Speaker grill with net

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050906

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060110

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060411

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060420

R150 Certificate of patent or registration of utility model

Ref document number: 3798647

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090428

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100428

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110428

Year of fee payment: 5

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120428

Year of fee payment: 6

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130428

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140428

Year of fee payment: 8

EXPY Cancellation because of completion of term