JP2009267581A - Speaker device - Google Patents

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JP2009267581A
JP2009267581A JP2008112348A JP2008112348A JP2009267581A JP 2009267581 A JP2009267581 A JP 2009267581A JP 2008112348 A JP2008112348 A JP 2008112348A JP 2008112348 A JP2008112348 A JP 2008112348A JP 2009267581 A JP2009267581 A JP 2009267581A
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cabinet
pipe
diaphragm
outside
air
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JP5211827B2 (en
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Koji Sano
浩司 佐野
Kazuki Honda
一樹 本田
Koichi Kuze
光一 久世
Satoru Ito
哲 伊藤
Takeshi Shimokawatoko
剛 下川床
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Panasonic Corp
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Panasonic Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact speaker device capable of bass reproduction. <P>SOLUTION: The speaker instrument has a diaphragm 13, a bottomed rectangular cabinet 5 to which the diaphragm 13 is mounted, an activated carbon 17 disposed in the internal space of the cabinet 5, and a through pipe 18 for connecting the inside and outside of the cabinet 5 to adjust atmospheric pressure inside the cabinet 5. When the diaphragm 13 vibrates from the inside of the cabinet 5 toward the outside, air flows into the through pipe 18 from the outside of the cabinet 5. When the diaphragm 13 vibrates from the outside of the cabinet 5 toward the inside, air flows out of the inside of the cabinet 5 to the inside of the through pipe 18. The outflow and inflow of air are completed inside the through pipe 18 to adjust atmospheric pressure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、小型のキャビネットで低音再生を実現するスピーカ装置に関するものである。   The present invention relates to a speaker device that realizes bass reproduction in a small cabinet.

以下、従来のスピーカ装置について説明する。   Hereinafter, a conventional speaker device will be described.

図８は従来のスピーカ装置の分解斜視図、図９は同スピーカ装置の断面図、図１０は同スピーカ装置の磁気回路の斜視図である。   8 is an exploded perspective view of a conventional speaker device, FIG. 9 is a sectional view of the speaker device, and FIG. 10 is a perspective view of a magnetic circuit of the speaker device.

図８〜図１０において、従来のスピーカ装置は、２個の棒状のマグネット２１を角型の上部プレート２２と角型の下部プレート２３とで挟持して磁気回路２４を構成している。この磁気回路２４は下部プレート２３に設けた棒状のポールピース部２３ａをはさんでマグネット２１が平行に挟持され、上部プレート２２の角型形状の磁気ギャップ窓２２ａ内にポールピース部２３ａが内在する。そのため、ポールピース部２３ａと上部プレート２２間に平行な２つの直線部では磁気ギャップ２５を有する。   8 to 10, the conventional speaker device forms a magnetic circuit 24 by sandwiching two bar-shaped magnets 21 between a rectangular upper plate 22 and a rectangular lower plate 23. In this magnetic circuit 24, a magnet 21 is sandwiched in parallel across a rod-shaped pole piece portion 23a provided on the lower plate 23, and the pole piece portion 23a is included in a rectangular magnetic gap window 22a of the upper plate 22. . Therefore, the two straight portions parallel to each other between the pole piece portion 23 a and the upper plate 22 have a magnetic gap 25.

この磁気回路２４にフレーム２６を結合し、このフレーム２６の外周部に振動板２７を結合している。そして、この振動板２７にボイスコイル２８を結合し、このボイスコイル２８の一部が磁気回路２４の磁気ギャップ２５内に配置している。このフレーム２６の外周部には振動板２７を覆うようにプロテクタ２９を結合している。   A frame 26 is coupled to the magnetic circuit 24, and a diaphragm 27 is coupled to the outer periphery of the frame 26. A voice coil 28 is coupled to the diaphragm 27, and a part of the voice coil 28 is disposed in the magnetic gap 25 of the magnetic circuit 24. A protector 29 is coupled to the outer periphery of the frame 26 so as to cover the diaphragm 27.

なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１が知られている。
特開２００４−２６６３３７号公報 As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2004-266337 A

上記構成では、２個の棒状マグネット２１を有し、その磁気ギャップ２５に直線部を有する外磁型の磁気回路の構成となっているので、スペースの有効利用で小型化を図れるとともに、複数のマグネット２１により大きな磁気エネルギーを得て高音圧化が図れる。   In the above configuration, since it has a configuration of an outer magnet type magnetic circuit having two bar-shaped magnets 21 and having a linear portion in the magnetic gap 25, it is possible to reduce the size by effectively using the space, and A large magnetic energy can be obtained by the magnet 21 to increase the sound pressure.

しかし、このスピーカ装置を例えば携帯電話等に搭載する場合は、スピーカ装置を非常に小型にする必要があり、特に、この際、フレーム２６で形成される空間が小さくなる。一般的に、空間が小さくなると低音再生が難しくなるので、小型かつ低音再生を同時に達成できないという問題点を有していた。   However, when this speaker device is mounted on, for example, a cellular phone, the speaker device needs to be very small. In particular, the space formed by the frame 26 is reduced at this time. Generally, bass reproduction becomes difficult when the space is small, so that there is a problem that small size and bass reproduction cannot be achieved at the same time.

本発明は上記問題点を解決するもので、小型かつ低音再生を同時に達成するスピーカ装置を提供することを目的としている。   The present invention solves the above-described problems, and an object of the present invention is to provide a speaker device that achieves small size and low sound reproduction simultaneously.

上記目的を達成するために本発明は、特に、振動板と、前記振動板を取り付けたキャビネットと、前記キャビネットの内部空間に配置した気体吸着部材と、前記キャビネットの内部と前記キャビネットの外部とを繋ぎ、前記キャビネットの内部の気圧を調整する貫通管とを備え、前記振動板が前記キャビネットの内部から外部に向かって振幅した時、前記キャビネットの外部から前記貫通管の内部に気体が流入し、前記振動板が前記キャビネットの外部から内部に向かって振幅した時、前記キャビネットの内部から前記貫通管の内部に気体が流出し、前記貫通管の内部で気体の流出入を完結させて前記空気圧を調整する構成である。   In order to achieve the above object, the present invention particularly includes a diaphragm, a cabinet to which the diaphragm is attached, a gas adsorbing member disposed in an internal space of the cabinet, an interior of the cabinet, and an exterior of the cabinet. And a through pipe that adjusts the air pressure inside the cabinet, and when the diaphragm oscillates from the inside of the cabinet toward the outside, gas flows into the through pipe from the outside of the cabinet, When the diaphragm oscillates from the outside to the inside of the cabinet, a gas flows out from the inside of the cabinet to the inside of the through pipe, and the inflow and outflow of the gas is completed inside the through pipe to thereby adjust the air pressure. It is the structure to adjust.

上記構成により、キャビネットの内部空間に気体吸着部材を配置しているので、キャビネットの内部空間が、見かけ上、大きくなって低音再生が可能となる。一般に、キャビネットに配置された振動板が振動する際、この振動に伴って空気が振動するとともにキャビネットの内部空間に気圧がかかる。しかし、キャビネットの内部空間に気体吸着部材を配置することにより、一定の空気が気体吸着部材に吸着されて気圧が緩和される。すなわち、キャビネットの内部空間が、見かけ上、大きくなったのと等しくなり、低音再生が可能となる。   With the above configuration, since the gas adsorbing member is arranged in the internal space of the cabinet, the internal space of the cabinet is apparently enlarged and bass reproduction is possible. In general, when a diaphragm arranged in a cabinet vibrates, air vibrates along with the vibration and atmospheric pressure is applied to the internal space of the cabinet. However, by disposing the gas adsorbing member in the internal space of the cabinet, certain air is adsorbed by the gas adsorbing member and the atmospheric pressure is relaxed. That is, the internal space of the cabinet is equivalent to the apparent increase, and bass reproduction is possible.

また、キャビネットの内部空間の空気は温度上昇によって膨張するので、キャビネットの内部空間を密閉すると、振動板に大きな負荷が加わる。そのため、キャビネットの内部空間とキャビネットの外部とを繋ぎ、キャビネットの内部空間の気圧を調整する貫通管を設けている。このため、キャビネットの外部の空気がキャビネットの内部空間に流入したり、キャビネットの内部空間の空気がキャビネットの外部に流出したりする。また、この空気の流出入は、振動板の振動によっても生じる。振動板がキャビネットの内部から外部に向かって振幅した時、キャビネットの外部から貫通管の内部に空気が流入し、振動板がキャビネットの外部から内部に向かって振幅した時、キャビネットの内部から貫通管の内部に空気が流出する。   In addition, since the air in the internal space of the cabinet expands due to a temperature rise, when the internal space of the cabinet is sealed, a large load is applied to the diaphragm. Therefore, a through pipe that connects the internal space of the cabinet and the outside of the cabinet and adjusts the atmospheric pressure of the internal space of the cabinet is provided. For this reason, the air outside the cabinet flows into the internal space of the cabinet, or the air inside the internal space of the cabinet flows out of the cabinet. This air inflow / outflow is also caused by vibration of the diaphragm. When the diaphragm swings from the inside of the cabinet to the outside, air flows into the through pipe from the outside of the cabinet, and when the diaphragm swings from the outside of the cabinet to the inside, the through pipe from the inside of the cabinet Air flows into the interior of the.

このとき、キャビネットの外部から流入する空気は一定の水蒸気を含み湿度を有するので、キャビネットの内部空間に配置した気体吸着部材がこれを吸湿し、性能を劣化させることがある。しかし、上記構成により、貫通管の内部で空気の流出入を完結させて気圧を調整するので、キャビネットの外部から流入する空気は貫通管の内部で流入が止まり、キャビネットの内部から流出する空気は貫通管の内部で流出が止まる。すなわち、湿度を含んだ空気がキャビネットの内部に直接流入することがなく、活性炭による吸湿を抑制できるので、活性炭の性能劣化を防止できる。   At this time, since the air flowing from the outside of the cabinet contains a certain amount of water vapor and has a humidity, the gas adsorbing member arranged in the internal space of the cabinet absorbs the moisture and may deteriorate the performance. However, with the above configuration, the air pressure is adjusted by completing the inflow and outflow of air inside the through pipe, so the air flowing from the outside of the cabinet stops flowing inside the through pipe, and the air flowing out from the inside of the cabinet is Outflow stops inside the through pipe. That is, air containing humidity does not flow directly into the cabinet, and moisture absorption by the activated carbon can be suppressed, so that performance degradation of the activated carbon can be prevented.

以下、本発明の一実施の形態のスピーカ装置について図面を参照しながら説明する。   Hereinafter, a speaker device according to an embodiment of the present invention will be described with reference to the drawings.

図１は、本スピーカ装置を搭載した携帯電話の斜視図である。図１において、１は電話機本体で、この電話機本体１にはディスプレイ本体２が開閉自在に結合されている。この図１における正面側から見ると一般的な携帯電話と同じように電話機本体１には操作ボタン（図示せず）が設けられ、またディスプレイ本体２には液晶ディスプレイ（図示せず）が設けられている。また、電話機本体１の背面側にはスピーカ装置３が内蔵され、電話機本体１の外側面に設けた放音孔４から放音される。   FIG. 1 is a perspective view of a mobile phone equipped with the speaker device. In FIG. 1, reference numeral 1 denotes a telephone main body, and a display main body 2 is coupled to the telephone main body 1 so as to be freely opened and closed. When viewed from the front side in FIG. 1, the telephone main body 1 is provided with operation buttons (not shown), and the display main body 2 is provided with a liquid crystal display (not shown), like a general mobile phone. ing. In addition, a speaker device 3 is built in the back side of the telephone body 1, and the sound is emitted from a sound emitting hole 4 provided on the outer surface of the telephone body 1.

スピーカ装置３は図２に示すように非磁性体からなるキャビネット５と蓋部６の前面の両端に放音孔７を有しており、キャビネット５と蓋部６で形成される振動空間に連通している。また、スピーカ装置３は蓋部６の上面の背面側近傍に端子板が設けられており、この端子板にボイスコイルの始終端が半田付けされる接合部８ａと、外部のアンプからの信号が入力される端子部８ｂを形成している。   As shown in FIG. 2, the speaker device 3 has sound emitting holes 7 at both ends of the front surface of the cabinet 5 and the lid portion 6 made of a nonmagnetic material, and communicates with a vibration space formed by the cabinet 5 and the lid portion 6. is doing. In addition, the speaker device 3 is provided with a terminal plate in the vicinity of the back side of the upper surface of the lid portion 6, and a joint portion 8 a where the start and end of the voice coil are soldered to this terminal plate, and a signal from an external amplifier is received. An input terminal portion 8b is formed.

スピーカ装置３は図３〜図５に示すように、コの字状のヨーク１０の中央に、このヨーク１０の肩部１０ａに平行となるように第１の棒状磁石１１が接合され、この第１の棒状磁石１１の上面に磁性体からなる下部プレート１２が接合されている。このように第１の棒状磁石１１および下部プレート１２が組み付けられたヨーク１０は有底状の矩形のキャビネット５の中央部に収容されて上記ヨーク１０の下面側および前記第１の棒状磁石１１の長手方向の両端部に振動空間が確保されている。   As shown in FIGS. 3 to 5, the speaker device 3 has a first bar-shaped magnet 11 joined to the center of the U-shaped yoke 10 so as to be parallel to the shoulder 10 a of the yoke 10. A lower plate 12 made of a magnetic material is joined to the upper surface of one bar-shaped magnet 11. The yoke 10 to which the first bar-shaped magnet 11 and the lower plate 12 are assembled in this way is housed in the center of the bottomed rectangular cabinet 5 so that the lower surface of the yoke 10 and the first bar-shaped magnet 11 Vibration spaces are secured at both ends in the longitudinal direction.

キャビネット５の底面において、ヨーク１０には気体吸着部材として粒状または繊維状の活性炭１７を配置している。この活性炭１７は、気体の吸着作用とともに吸湿作用がある。前記ヨーク１０は前記キャビネット５内に設けた溝部５ａ内に結合され、その肩部１０ａの上面が前記キャビネット５内に設けた段部５ｂの上面と同じ平面とされ、後述する振動板１３の接合しろとして利用されるようになっている。   On the bottom surface of the cabinet 5, granular or fibrous activated carbon 17 is disposed in the yoke 10 as a gas adsorbing member. The activated carbon 17 has a hygroscopic action as well as a gas adsorbing action. The yoke 10 is coupled to a groove portion 5a provided in the cabinet 5, and the upper surface of the shoulder portion 10a is flush with the upper surface of the step portion 5b provided in the cabinet 5. It has come to be used as a margin.

スピーカ装置３は振動板１３に長円形状のボイスコイル１４が接合され、その外周の支持部１３ａがキャビネット５側の接合しろに接着剤により接合されている。これによって、振動板１３がキャビネット５に取り付けられる。   In the speaker device 3, an elliptical voice coil 14 is joined to a diaphragm 13, and a support portion 13 a on the outer periphery thereof is joined to a joining margin on the cabinet 5 side by an adhesive. Accordingly, the diaphragm 13 is attached to the cabinet 5.

キャビネット５の内部とキャビネット５の外部とは貫通管１８を介して繋ぎ、キャビネット５の内部の気圧を調整している。振動板１３がキャビネット５の内部から外部に向かって振幅した時、キャビネット５の外部から貫通管１８の内部に空気が流入し、振動板１３がキャビネット５の外部から内部に向かって振幅した時、キャビネット５の内部から貫通管１８の内部に空気が流出し、貫通管１８の内部で空気の流出入を完結させて気圧を調整している。この貫通管１８は蛇行形状であって、キャビネット５の下面に配置している。   The inside of the cabinet 5 and the outside of the cabinet 5 are connected via a through pipe 18 to adjust the atmospheric pressure inside the cabinet 5. When the diaphragm 13 oscillates from the inside of the cabinet 5 to the outside, air flows from the outside of the cabinet 5 to the inside of the through pipe 18, and when the diaphragm 13 oscillates from the outside of the cabinet 5 to the inside, Air flows out from the inside of the cabinet 5 into the through pipe 18, and the air pressure is adjusted by completing the inflow and outflow of air inside the through pipe 18. The through pipe 18 has a meandering shape and is disposed on the lower surface of the cabinet 5.

第１の棒状磁石１１の前後には当該第１の棒状磁石１１と平行となるように第２の棒状磁石１５が配置されており、第１の棒状磁石１１との間に所定の磁気ギャップを形成している。ここで、第２の棒状磁石１５は図３に示すように第１の棒状磁石１１の斜め上方に配置されている。   Before and after the first bar-shaped magnet 11, a second bar-shaped magnet 15 is arranged so as to be parallel to the first bar-shaped magnet 11, and a predetermined magnetic gap is provided between the first bar-shaped magnet 11 and the first bar-shaped magnet 11. Forming. Here, the second bar-shaped magnet 15 is disposed obliquely above the first bar-shaped magnet 11 as shown in FIG.

上記キャビネット５と組み合わされる蓋部６は前記端子板をインサート成形したコの字の枠形の蓋本体６ａと、この蓋本体６ａの上部窓を塞ぐ非磁性体の上蓋６ｂと、上記蓋本体６ａの前面窓中央を塞ぐ前蓋６ｃから構成されており、その前蓋６ｃの両端部に放音孔７を形成するための窓部を有する。この蓋部６の内部には前記第１、第２の棒状磁石１１，１５と平行な関係で２枚の板状のヨーク１６が接合されており、そのヨーク１６の内面に第２の棒状磁石１５がそれぞれ接合されている。   The lid portion 6 combined with the cabinet 5 includes a U-shaped frame-shaped lid body 6a in which the terminal plate is insert-molded, a nonmagnetic upper lid 6b that closes the upper window of the lid body 6a, and the lid body 6a. The front lid 6c closes the center of the front window, and has window portions for forming sound emission holes 7 at both ends of the front lid 6c. Two plate-like yokes 16 are joined to the inside of the lid portion 6 in parallel with the first and second rod-like magnets 11 and 15, and the second rod-like magnet is joined to the inner surface of the yoke 16. 15 are respectively joined.

このスピーカ装置３は、まず、前記第１の棒状磁石１１および上部プレート１２が組み付けられたヨーク１０を前記キャビネット５に組み付け、ヨーク１０の外側に活性炭１７を配置する。次に、前記ボイスコイル１４を組み付けた振動板１３を前記キャビネット５側に組み付ける。そして、前記第２の棒状磁石１５を組み付けた蓋部６を前記キャビネット５に組み付けて組み立てられる。   In the speaker device 3, first, the yoke 10 in which the first rod-shaped magnet 11 and the upper plate 12 are assembled is assembled in the cabinet 5, and the activated carbon 17 is disposed outside the yoke 10. Next, the diaphragm 13 assembled with the voice coil 14 is assembled to the cabinet 5 side. Then, the lid portion 6 assembled with the second rod-shaped magnet 15 is assembled to the cabinet 5 and assembled.

この組み立てにより、前記振動板１３は第１の棒状磁石１１の上面方向の空間に配置され、かつ第２の棒状磁石１５の下面方向の空間に配置される。また、振動板１３の長手方向の両端部分が第１、第２の棒状磁石１１，１５の存在しない比較的大きい振動空間に配置され、振動板１３の背面と対向するように活性炭１７が配置される。   By this assembly, the diaphragm 13 is arranged in the space in the upper surface direction of the first bar-shaped magnet 11 and in the space in the lower surface direction of the second bar-shaped magnet 15. Further, both end portions in the longitudinal direction of the diaphragm 13 are disposed in a relatively large vibration space where the first and second rod-shaped magnets 11 and 15 are not present, and the activated carbon 17 is disposed so as to face the back surface of the diaphragm 13. The

一方、前記ヨーク１０の肩部１０ａに振動板１３の支持部１３ａを介して前記蓋部６側のヨーク１６の長手方向上面が近接して対向し、第１、第２の棒状磁石１１，１５を磁気的に結合している。   On the other hand, the upper surface in the longitudinal direction of the yoke 16 on the lid 6 side is closely opposed to the shoulder portion 10a of the yoke 10 via the support portion 13a of the diaphragm 13, and the first and second bar magnets 11 and 15 are opposed to each other. Are magnetically coupled.

このように矩形のキャビネット５と蓋部６にスピーカ装置１３を構成することにより、スペースファクターの向上、小型、薄型で音圧レベルの向上に有利な構成としている。   By configuring the speaker device 13 in the rectangular cabinet 5 and the lid portion 6 in this way, the space factor is improved, and the configuration is advantageous for improving the sound pressure level with a small size and a thin shape.

上記構成により、キャビネット５の内部空間に気体吸着部材として活性炭１７を配置しているので、キャビネット５の内部空間が、見かけ上、大きくなって低音再生が可能となる。一般に、キャビネット５に配置された振動板１３が振動する際、この振動に伴って空気が振動するとともにキャビネット５の内部空間に気圧がかかる。しかし、キャビネット５の内部空間に気体吸着部材を配置することにより、一定の空気が気体吸着部材に吸着されて気圧が緩和される。すなわち、キャビネット５の内部空間が、見かけ上、大きくなったのと等しくなり、低音再生が可能となる。   With the above configuration, since the activated carbon 17 is disposed as a gas adsorbing member in the internal space of the cabinet 5, the internal space of the cabinet 5 is apparently enlarged and bass reproduction is possible. In general, when the vibration plate 13 arranged in the cabinet 5 vibrates, air vibrates along with the vibration and atmospheric pressure is applied to the internal space of the cabinet 5. However, by disposing the gas adsorbing member in the internal space of the cabinet 5, certain air is adsorbed by the gas adsorbing member, and the atmospheric pressure is relaxed. That is, the internal space of the cabinet 5 is apparently equivalent to being enlarged, and bass reproduction is possible.

図６は活性炭と音響周波数特性の関係を示す周波数特性図である。図６に示すように、活性炭１７を配置することによって、音響特性の周波数ピークが低周波数側に推移（１３００Ｈｚが９５０Ｈｚに推移）するので、より低音再生が可能となる。   FIG. 6 is a frequency characteristic diagram showing the relationship between activated carbon and acoustic frequency characteristics. As shown in FIG. 6, by arranging the activated carbon 17, the frequency peak of the acoustic characteristics shifts to the low frequency side (1300 Hz transitions to 950 Hz), so that lower sound reproduction is possible.

また、キャビネット５の内部空間の空気は温度上昇によって膨張するので、キャビネット５の内部空間を密閉すると、振動板１３に大きな負荷が加わる。そのため、キャビネット５の内部とキャビネット５の外部とを繋ぎ、キャビネット５の内部の気圧を調整する蛇行形状の貫通管１８を設けている。このため、キャビネット５の外部の空気がキャビネット５の内部空間に流入したり、キャビネット５の内部空間の空気がキャビネット５の外部に流出したりする。また、この空気の流出入は、振動板１３の振動によっても生じる。振動板１３がキャビネット５の内部から外部に向かって振幅した時、キャビネット５の外部から貫通管１８の内部に空気が流入し、振動板１３がキャビネット５の外部から内部に向かって振幅した時、キャビネット５の内部から貫通管１８の内部に空気が流出する。この気体は一定の水蒸気を含み湿度を有しており、上記の空気の流出入は図７に示すとおりとなる。   Further, since the air in the internal space of the cabinet 5 expands due to a temperature rise, when the internal space of the cabinet 5 is sealed, a large load is applied to the diaphragm 13. Therefore, a meandering through pipe 18 that connects the inside of the cabinet 5 and the outside of the cabinet 5 and adjusts the pressure inside the cabinet 5 is provided. For this reason, the air outside the cabinet 5 flows into the internal space of the cabinet 5, or the air inside the cabinet 5 flows out of the cabinet 5. This air inflow / outflow is also caused by vibration of the diaphragm 13. When the diaphragm 13 oscillates from the inside of the cabinet 5 to the outside, air flows from the outside of the cabinet 5 to the inside of the through pipe 18, and when the diaphragm 13 oscillates from the outside of the cabinet 5 to the inside, Air flows out of the cabinet 5 into the through pipe 18. This gas contains a certain amount of water vapor and has a humidity, and the inflow and outflow of the air is as shown in FIG.

図７（ａ）（ｂ）は貫通管における空気の流出入を示す説明図である。振動板１３を取り付けたキャビネット５の内部の湿度を湿度Ａ、キャビネット５の外部の湿度を湿度Ｂとした場合、貫通管１８の内部にて湿度Ａと湿度Ｂの境界が存在する。振動板１３がキャビネット５の内部から外部に向かって振幅した時、キャビネット５の外部から貫通管１８の内部に空気が流入し、湿度Ａと湿度Ｂの境界がキャビネット５の内部側に変位する。振動板１３がキャビネット５の外部から内部に向かって振幅した時、キャビネット５の内部から貫通管１８の内部に空気が流出し、湿度Ａと湿度Ｂの境界がキャビネット５の外部側に変位する。   FIGS. 7A and 7B are explanatory views showing the inflow and outflow of air in the through pipe. When the humidity inside the cabinet 5 to which the diaphragm 13 is attached is humidity A and the humidity outside the cabinet 5 is humidity B, a boundary between the humidity A and the humidity B exists inside the through pipe 18. When the diaphragm 13 swings from the inside of the cabinet 5 toward the outside, air flows from the outside of the cabinet 5 into the through pipe 18, and the boundary between the humidity A and the humidity B is displaced toward the inside of the cabinet 5. When the diaphragm 13 oscillates from the outside to the inside of the cabinet 5, air flows from the inside of the cabinet 5 to the inside of the through pipe 18, and the boundary between the humidity A and the humidity B is displaced to the outside of the cabinet 5.

また、水蒸気は拡散作用があるが、ωを拡散速度[ｇ/ｓ]、Ｋを拡散係数[ｇ/ｃｍ2・ｓ・ｈＰａ]、ｅaを湿度Ａの水蒸気圧[ｈＰａ]、ｅbを湿度Ｂの水蒸気圧[ｈＰａ]、境界断面積をＳ、境界長さ（水蒸気圧勾配）をＬとした場合、この拡散速度は（数１）のとおりである。 Water vapor has a diffusing action, ω is the diffusion rate [g / s], K is the diffusion coefficient [g / cm 2 · s · hPa], e a is the water vapor pressure [hPa] of humidity A, and e b When the water vapor pressure [hPa] at humidity B, the boundary cross-sectional area is S, and the boundary length (water vapor pressure gradient) is L, this diffusion rate is as shown in (Equation 1).

Figure 2009267581
Figure 2009267581

キャビネット５の外部から流入する空気は一定の水蒸気を含み湿度があるので、キャビネット５の内部空間に配置した気体吸着部材がこれを吸湿し、性能を劣化させることがある。しかし、上記構成により、貫通管１８の内部で空気の流出入を完結させて空気圧を調整するので、キャビネット５の外部から流入する空気は貫通管１８の内部で流入が止まり、キャビネット５の内部から流出する空気は貫通管１８の内部で流出が止まる。すなわち、湿度を含んだ空気がキャビネットの内部に直接流入することがなく、活性炭１７による吸湿を抑制できるので、活性炭１７の性能劣化を防止できる。特に、蛇行形状にすれば、省スペースで貫通管１８の距離を確保することができ、空気の流出入を貫通管１８の内部で的確に完結することができる。なお、拡散速度が、ターゲット以下であればより良い。   Since the air flowing from the outside of the cabinet 5 contains a certain amount of water vapor and has humidity, the gas adsorbing member disposed in the internal space of the cabinet 5 may absorb the moisture and deteriorate the performance. However, since the air pressure is adjusted by completing the inflow and outflow of air inside the through pipe 18 with the above configuration, the inflow of air flowing from the outside of the cabinet 5 stops flowing inside the through pipe 18 and from the inside of the cabinet 5. Outflowing air stops flowing out inside the through pipe 18. That is, air containing humidity does not flow directly into the cabinet, and moisture absorption by the activated carbon 17 can be suppressed, so that performance deterioration of the activated carbon 17 can be prevented. In particular, if the meandering shape is adopted, the distance of the through pipe 18 can be ensured in a space-saving manner, and the inflow and outflow of air can be accurately completed inside the through pipe 18. It is better if the diffusion rate is equal to or less than the target.

本発明に係るスピーカ装置は、小型かつ低音再生を同時に達成することができ、携帯電話等の携帯機器に適用可能である。   The speaker device according to the present invention can simultaneously achieve a small size and low sound reproduction, and can be applied to a portable device such as a cellular phone.

本発明の一実施の形態におけるスピーカ装置を適用した携帯電話の斜視図The perspective view of the mobile telephone to which the speaker apparatus in one embodiment of this invention is applied 同スピーカ装置の斜視図Perspective view of the speaker device 同スピーカ装置を短手方向で切断した断面図Sectional view of the speaker device cut in the short direction 同スピーカ装置を長手方向で切断した断面図Sectional view of the speaker device cut in the longitudinal direction 同スピーカ装置の分解斜視図Exploded perspective view of the speaker device 活性炭と音響周波数特性の関係を示す周波数特性図Frequency characteristics diagram showing the relationship between activated carbon and acoustic frequency characteristics 貫通管における空気の流出入を示す説明図Explanatory drawing showing the inflow and outflow of air in the through pipe 従来のスピーカ装置の分解斜視図Exploded perspective view of a conventional speaker device 同スピーカ装置の断面図Cross-sectional view of the speaker device 同スピーカ装置の磁気回路の斜視図Perspective view of magnetic circuit of the speaker device

符号の説明Explanation of symbols

１ 電話機本体
２ ディスプレイ本体
３ スピーカ
４ 放音孔
５ キャビネット
５ａ 溝部
５ｂ 段部
６ 蓋部
６ａ 蓋本体
６ｂ 上蓋
６ｃ 前蓋
７ 放音孔
８ａ 接合部
８ｂ 端子部
１０ ヨーク
１０ａ 肩部
１１ 第１の棒状磁石
１２ 下部プレート
１３ 振動板
１３ａ 支持部
１４ ボイスコイル
１５ 第２の棒磁石
１６ ヨーク
１７ 活性炭
１８ 貫通管 DESCRIPTION OF SYMBOLS 1 Telephone main body 2 Display main body 3 Speaker 4 Sound emission hole 5 Cabinet 5a Groove part 5b Step part 6 Lid part 6a Lid main body 6b Top cover 6c Front cover 7 Sound emission hole 8a Joint part 8b Terminal part 10 York 10a Shoulder part 11 1st rod shape Magnet 12 Lower plate 13 Diaphragm 13a Support portion 14 Voice coil 15 Second bar magnet 16 Yoke 17 Activated carbon 18 Through pipe

Claims (2)

振動板と、
前記振動板を取り付けたキャビネットと、
前記キャビネットの内部空間に配置した気体吸着部材と、
前記キャビネットの内部と前記キャビネットの外部とを繋ぎ、
前記キャビネットの内部の気圧を調整する貫通管とを備え、
前記振動板が前記キャビネットの内部から外部に向かって振幅した時、
前記キャビネットの外部から前記貫通管の内部に気体が流入し、
前記振動板が前記キャビネットの外部から内部に向かって振幅した時、
前記キャビネットの内部から前記貫通管の内部に気体が流出し、
前記貫通管の内部で気体の流出入を完結させて前記気圧を調整するスピーカ装置。 A diaphragm,
A cabinet with the diaphragm attached thereto;
A gas adsorbing member disposed in the internal space of the cabinet;
Connecting the inside of the cabinet and the outside of the cabinet,
A through pipe for adjusting the pressure inside the cabinet;
When the diaphragm oscillates from the inside to the outside of the cabinet,
Gas flows into the through pipe from the outside of the cabinet,
When the diaphragm oscillates from the outside to the inside of the cabinet,
Gas flows out from the inside of the cabinet into the through pipe,
A speaker device that adjusts the atmospheric pressure by completing the inflow and outflow of gas inside the through pipe. 前記貫通管は蛇行形状にした請求項１記載のスピーカ装置。 The speaker device according to claim 1, wherein the through pipe has a meandering shape.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140064540A1 (en) 2012-08-31 2014-03-06 Bose Corporation Loudspeaker System
US8794373B1 (en) 2013-03-15 2014-08-05 Bose Corporation Three-dimensional air-adsorbing structure
WO2021135878A1 (en) * 2020-01-02 2021-07-08 歌尔股份有限公司 Activated carbon sound-absorption material, sound production apparatus and electronic device
US11356767B2 (en) 2019-08-02 2022-06-07 Samsung Electronics Co., Ltd. Speaker module including air adsorption member, and electronic device including the same

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Publication number Priority date Publication date Assignee Title
JPS5574188A (en) * 1978-11-30 1980-06-04 Toshiba Corp Solar-baterry paddle holding and releasing mechanism
WO2005101896A1 (en) * 2004-04-13 2005-10-27 Matsushita Electric Industrial Co., Ltd. Speaker device
JP2008092034A (en) * 2006-09-29 2008-04-17 Matsushita Electric Ind Co Ltd Speaker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5574188A (en) * 1978-11-30 1980-06-04 Toshiba Corp Solar-baterry paddle holding and releasing mechanism
WO2005101896A1 (en) * 2004-04-13 2005-10-27 Matsushita Electric Industrial Co., Ltd. Speaker device
JP2008092034A (en) * 2006-09-29 2008-04-17 Matsushita Electric Ind Co Ltd Speaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140064540A1 (en) 2012-08-31 2014-03-06 Bose Corporation Loudspeaker System
US8687836B2 (en) 2012-08-31 2014-04-01 Bose Corporation Loudspeaker system
US8794373B1 (en) 2013-03-15 2014-08-05 Bose Corporation Three-dimensional air-adsorbing structure
US9232299B2 (en) 2013-03-15 2016-01-05 Bose Corporation Three-dimensional air-adsorbing structure
US11356767B2 (en) 2019-08-02 2022-06-07 Samsung Electronics Co., Ltd. Speaker module including air adsorption member, and electronic device including the same
WO2021135878A1 (en) * 2020-01-02 2021-07-08 歌尔股份有限公司 Activated carbon sound-absorption material, sound production apparatus and electronic device

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