JP4962299B2 - Waterproof packing for portable radio microphone - Google Patents

Waterproof packing for portable radio microphone Download PDF

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JP4962299B2
JP4962299B2 JP2007329614A JP2007329614A JP4962299B2 JP 4962299 B2 JP4962299 B2 JP 4962299B2 JP 2007329614 A JP2007329614 A JP 2007329614A JP 2007329614 A JP2007329614 A JP 2007329614A JP 4962299 B2 JP4962299 B2 JP 4962299B2
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waterproof packing
microphone
section
portable radio
cross
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JP2009152926A (en
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信彦 南
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JVCKenwood Corp
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JVCKenwood Corp
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Description

この発明は携帯無線機に係わり、特に、そのマイクロホン用防水パッキングに関する。   The present invention relates to a portable wireless device, and more particularly to a waterproof packing for a microphone.

従来の携帯無線機のマイクロホン用防水パッキングの例を図３により説明する。図３に示す携帯無線機の合成樹脂製のケース１にはマイクロホン２を配置さするための円筒部１ｂが一体に形成されており、円筒部１ｂの中心軸上に音孔１ａが形成されている。   An example of a conventional waterproof packing for a microphone of a portable wireless device will be described with reference to FIG. A synthetic resin case 1 of the portable radio shown in FIG. 3 is integrally formed with a cylindrical portion 1b for placing the microphone 2, and a sound hole 1a is formed on the central axis of the cylindrical portion 1b. Yes.

前記円筒部１ｂ内に配置されるゴム製の防水パッキング３は有底円筒形に形成されており、前記防水パッキング３の音孔１ａと対向する部分は薄膜に形成され振動膜３ａとなっている。   The rubber waterproof packing 3 disposed in the cylindrical portion 1b is formed in a bottomed cylindrical shape, and the portion of the waterproof packing 3 that faces the sound hole 1a is formed as a thin film to form a vibration film 3a. .

図示しないプリント基板に実装された円筒形のＥＣＭ（electric condenser microhon)であるマイクロホン２が図２に示すように防水パッキング３内に圧入されると、防水パッキング３の前面にループ状の凸部として形成された防水リブ３ｂがケース１の内面と圧接して音孔１ａから侵入した水が機器内部に入ることが防止される。音孔１ａに入った音は振動膜３ａを振動させることによりマイクロホン２に伝えられる。   When a microphone 2, which is a cylindrical ECM (electric condenser microhon) mounted on a printed circuit board (not shown), is press-fitted into the waterproof packing 3 as shown in FIG. 2, a loop-shaped convex portion is formed on the front surface of the waterproof packing 3. The formed waterproof rib 3b is in pressure contact with the inner surface of the case 1 to prevent water that has entered from the sound hole 1a from entering the inside of the device. The sound entering the sound hole 1a is transmitted to the microphone 2 by vibrating the vibrating membrane 3a.

特開２００２−１８６０７８公報に開示された携帯電話機等のマイクロホンのホルダ１には保持部２の音孔４を塞ぐ防水機能を有する膜３が保持部２と一体に形成されている。この膜３は前記した振動膜と同様の機能を有する。一体成形時に膜３に所定の張力を印加することは不可能であり、僅かな張力が加わったとしても張力の大きさは一定とならず、所望の音響特性を得ることはできない。
特開２００２−１８６０７８公報、要約、図１ A microphone 3 such as a mobile phone disclosed in Japanese Patent Application Laid-Open No. 2002-186078 has a waterproof film 3 that closes the sound hole 4 of the holding unit 2 formed integrally with the holding unit 2. This film 3 has the same function as the vibration film described above. It is impossible to apply a predetermined tension to the membrane 3 at the time of integral molding, and even if a slight tension is applied, the magnitude of the tension is not constant, and desired acoustic characteristics cannot be obtained.
Japanese Patent Laid-Open No. 2002-186078, abstract, FIG.

上記した図３に示す従来の携帯無線機のマイクロホン用防水パッキングでは、音孔１ａに外部から入る音により振動膜３ａを振動させて内部に音を伝えるものであるが、振動膜３ａの共振周波数やＱ値等の周波数・ゲイン特性により内部に伝えられる音が変化する。   In the above-described waterproof packing for a microphone of a portable wireless device shown in FIG. 3, the vibration film 3a is vibrated by sound entering the sound hole 1a from the outside and the sound is transmitted to the inside, but the resonance frequency of the vibration film 3a The sound transmitted to the inside varies depending on the frequency / gain characteristics such as the Q value.

そして、この周波数・ゲイン特性は振動膜３ａに印加されている張力により大きく変わるが、その張力は、防水リブ３ｂや振動膜３ａを有する有底円筒形防水パッキングの底面をマイクロホン２とケース１で挟圧するのみでは安定しない。すなわち、寸法公差によるばらつきが大きく、張力がなかったり、わずかな張力が印加されたりすることになる。このため、振動膜３ａの共周波数・ゲイン特性が劣化するものがあり、品質にばらつきが生じていた。   The frequency / gain characteristics vary greatly depending on the tension applied to the vibrating membrane 3a. The tension is measured between the microphone 2 and the case 1 on the bottom surface of the bottomed cylindrical waterproof packing having the waterproof rib 3b and the vibrating membrane 3a. It is not stable just by pinching. That is, there are large variations due to dimensional tolerances, and there is no tension or a slight tension is applied. For this reason, some of the co-frequency / gain characteristics of the vibrating membrane 3a are deteriorated, resulting in variations in quality.

特開２００２−１８６０７８公報に開示された携帯電話機等のマイクロホンのホルダでは、一体成形時に膜３に所定の張力を印加することは不可能であり、僅かな張力が加わったとしても張力の大きさは一定とならず、所望の音響特性を得ることはできない。   In the holder of a microphone such as a mobile phone disclosed in Japanese Patent Laid-Open No. 2002-186078, it is impossible to apply a predetermined tension to the membrane 3 at the time of integral molding. Even if a slight tension is applied, the magnitude of the tension is not possible. Is not constant, and desired acoustic characteristics cannot be obtained.

この発明は上記した点に鑑みてなされたものであって、その目的とするところは、振動膜の周波数・ゲイン特性が人の声を良好に伝える安定した特性となる携帯無線機のマイクロホン用防水パッキングを提供することにある。   The present invention has been made in view of the above points, and an object of the present invention is to provide waterproofing for a microphone of a portable wireless device in which the frequency / gain characteristics of a diaphragm are stable characteristics that can convey a human voice well. To provide packing.

この発明の携帯無線機のマイクロホン用防水パッキングは、ケースの音孔周囲に設けた円筒部と円筒形マイクロホンとの間に挾持される有底円筒形の防水パッキングであって、底面の前記音孔と対向する位置に薄膜の振動膜が形成されており、前記有底円筒形内隅部に配置された切れ目を有する断面円形リングが防水パッキング内にマイクロホンを挿入するときに押し広げられ、前記断面円形リングにより前記振動膜に所定の張力が印加されるものである。   A waterproof packing for a microphone of a portable wireless device according to the present invention is a bottomed cylindrical waterproof packing sandwiched between a cylindrical portion provided around a sound hole of a case and a cylindrical microphone, and the sound hole on the bottom surface A thin diaphragm is formed at a position opposite to the cross section, and a circular ring with a cross-section disposed at the inner corner of the bottomed cylindrical shape is spread when a microphone is inserted into the waterproof packing, and the cross section A predetermined tension is applied to the vibrating membrane by a circular ring.

この発明の携帯無線機のマイクロホン用防水パッキングによれば、音を伝える振動膜の張力を所望の値とすることができるので、人の声がクリアに伝えられる。   According to the waterproof packing for a microphone of a portable wireless device of the present invention, the tension of the vibrating membrane that transmits sound can be set to a desired value, so that a human voice can be transmitted clearly.

以下この発明を実施するための最良の形態を実施例に即して説明する。図１この発明の実施例である携帯無線機のマイクロホン用防水パッキングを示す断面図、図２は同防水パッキングに用いられる断面円形リング４を示す平面図である。   The best mode for carrying out the present invention will be described below with reference to examples. FIG. 1 is a cross-sectional view showing a waterproof packing for a microphone of a portable radio apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view showing a circular cross-section ring 4 used for the waterproof packing.

図１に示すポリカーボネート製のケース１、硬度５０°のシリコンゴムで作られた防水パッキング３およびマイクロホン２は図３で説明したものと同様のものが用いられており、その詳細な説明を省略する。実施例の防水パッキング３には底面と円筒とが連なる隅に図２に詳しく示す断面円形リング４が配置されている。   The polycarbonate case 1, the waterproof packing 3 made of silicon rubber having a hardness of 50 °, and the microphone 2 shown in FIG. 1 are the same as those described with reference to FIG. . In the waterproof packing 3 of the embodiment, a circular ring 4 having a cross section shown in detail in FIG. 2 is arranged at a corner where the bottom surface and the cylinder are continuous.

断面円形リング４は、合成樹脂または金属で作られリングの一部が切り欠れた形状であり、自然状態での内径はマイクロホン２の外径より小さい。また、断面円形リング４の自然状態での外径は防水パッキング３の内径より小さいので、断面円形リング４を防水パッキング３の隅に落とし込んだ状態で、マイクロホン２を断面円形リング４内に挿入すると、断面円形リング４はマイクロホン２により押し広げられ、断面円形リング４により防水パッキング３の底面が外側方向に一様に広げられる。このように組立て作業が極めて簡単である。   The circular cross-section 4 is made of a synthetic resin or metal and has a shape in which a part of the ring is cut out, and the natural inner diameter is smaller than the outer diameter of the microphone 2. Further, since the outer diameter of the circular cross-section ring 4 in the natural state is smaller than the inner diameter of the waterproof packing 3, when the microphone 2 is inserted into the circular cross-section ring 4 with the cross-section circular ring 4 dropped into the corner of the waterproof packing 3. The circular cross-section ring 4 is pushed and expanded by the microphone 2, and the bottom face of the waterproof packing 3 is uniformly spread outward by the circular cross-section ring 4. Thus, the assembling work is extremely simple.

このうよにして、防水パッキング３の厚さ０．２mm程度の振動膜３ａに矢印で示す外側方向に引っ張られる一様の張力が加わるが、その張力を防水パッキング３の材質、振動膜３ａの厚さ・外径に対応した最適値とすることは、断面円形リング４の寸法設計により可能となる。   In this way, a uniform tension is applied to the vibration membrane 3a of the waterproof packing 3 having a thickness of about 0.2 mm which is pulled in the outer direction indicated by the arrow. The tension is applied to the material of the waterproof packing 3 and the vibration membrane 3a. The optimum value corresponding to the thickness and the outer diameter can be set by the dimension design of the circular ring 4 in section.

実施例では携帯無線機にこの発明を適用した場合が記載されているが、この発明でいう携帯無線機は携帯電話機を含むものと解される。   In the embodiment, the case where the present invention is applied to a portable wireless device is described. However, the portable wireless device referred to in the present invention is understood to include a mobile phone.

この発明の実施例である携帯無線機のマイクロホン用防水パッキングを示す断面図である。It is sectional drawing which shows the waterproof packing for microphones of the portable radio | wireless machine which is an Example of this invention. 同防水パッキングに用いられる断面円形リングを示す平面図である。It is a top view which shows the cross-sectional circular ring used for the waterproof packing. 従来の携帯無線機のマイクロホン用防水パッキングの例を示す断面図である。It is sectional drawing which shows the example of the waterproof packing for microphones of the conventional portable radio | wireless machine.

符号の説明Explanation of symbols

１ ケース、１ａ 音孔、１ｂ 円筒部
２ マイクロホン
３ 防水パッキング、３ａ 振動膜、３ｂ 防水リブ
４ 断面円形リング DESCRIPTION OF SYMBOLS 1 Case, 1a Sound hole, 1b Cylindrical part 2 Microphone 3 Waterproof packing, 3a Vibration membrane, 3b Waterproof rib 4 Circular ring in cross section

Claims (1)

ケースの音孔周囲に設けた円筒部と円筒形マイクロホンとの間に挾持される有底円筒形の防水パッキングであって、底面の前記音孔と対向する位置に薄膜の振動膜が形成されており、前記有底円筒形内隅部に配置された切れ目を有する断面円形リングが防水パッキング内にマイクロホンを挿入するときに押し広げられ、前記断面円形リングにより前記振動膜に所定の張力が印加されることを特徴とする携帯無線機のマイクロホン用防水パッキング。 A bottomed cylindrical waterproof packing sandwiched between a cylindrical portion and a cylindrical microphone provided around the sound hole of the case, and a thin film vibration film is formed at a position facing the sound hole on the bottom surface A circular ring having a cross section disposed at the inner corner of the bottomed cylindrical shape is spread when a microphone is inserted into the waterproof packing, and a predetermined tension is applied to the vibrating membrane by the circular cross section. Waterproof packing for portable radio microphones.
JP2007329614A 2007-12-21 2007-12-21 Waterproof packing for portable radio microphone Expired - Fee Related JP4962299B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111200681A (en) * 2018-11-16 2020-05-26 北京小米移动软件有限公司 Waterproof sealing structure and terminal equipment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9560430B2 (en) * 2012-02-28 2017-01-31 JVC Kenwood Corporation Waterproof structure and electronic equipment including the same
JP6216269B2 (en) * 2014-03-11 2017-10-18 株式会社コロナ Intercom device
JP2017152945A (en) 2016-02-25 2017-08-31 京セラ株式会社 Electronic device

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* Cited by examiner, † Cited by third party
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JPH0649539B2 (en) * 1985-07-17 1994-06-29 日成ビルド工業株式会社 Panel material reversing device
JP3210703B2 (en) * 1991-10-28 2001-09-17 松下電工株式会社 Drip-proof ultrasonic microphone
JPH07336262A (en) * 1994-06-03 1995-12-22 Kokusai Electric Co Ltd Microphone mount structure for portable electronic device
JP2006333076A (en) * 2005-05-26 2006-12-07 Vertex Standard Co Ltd Waterproof microphone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111200681A (en) * 2018-11-16 2020-05-26 北京小米移动软件有限公司 Waterproof sealing structure and terminal equipment

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