JPS62311Y2 - - Google Patents
Info
- Publication number
- JPS62311Y2 JPS62311Y2 JP1981006194U JP619481U JPS62311Y2 JP S62311 Y2 JPS62311 Y2 JP S62311Y2 JP 1981006194 U JP1981006194 U JP 1981006194U JP 619481 U JP619481 U JP 619481U JP S62311 Y2 JPS62311 Y2 JP S62311Y2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- thin film
- film layer
- radio
- housing
- 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
Links
- 239000010409 thin film Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Transceivers (AREA)
Description
【考案の詳細な説明】
この考案は、スピーカ、特に携帯型無線機等に
使用されるスピーカに関する。[Detailed Description of the Invention] This invention relates to a speaker, particularly a speaker used in a portable radio device or the like.
小型軽量で、使用者が運搬しながら通信できる
携帯型無線機においては、アンテナを通して発射
された自己の送信電波が付近の電波反射体により
反射され、再び発射元の無線機に戻つてくる状況
で使用する場合が多い。一般に携帯型無線機は、
電波反射体が至近距離に位置するような条件のも
とで使用されることが多いので、アンテナを空中
に高く設置し、至近距離に電波反射体が存在しな
いように設置された固定局の場合に比べて、反射
されて戻つてくる電波の強度はかなり大きな値を
示す。このようにして、戻つて来た電波は、携帯
型無線機の筐体の電磁しやへいが不完全である
と、送信用増幅系統に入り込む。この結果、戻つ
て来た電磁波は、再び増幅され、アンテナから放
射されるが、このときの増幅度がアンテナから電
波反射体を経て、送信用増幅系統に入り込む個所
までの減衰度に比べて大きいと。正帰還ループが
形成され、無線機は異状発振を起こし、通信不能
となる。 In a portable radio device that is small and lightweight and can be carried by the user while communicating, the radio waves emitted through the antenna are reflected by nearby radio wave reflectors and returned to the radio device from which they were emitted. Often used. Generally, portable radios are
Since it is often used under conditions where a radio wave reflector is located at close range, in the case of a fixed station where the antenna is installed high in the air and is installed so that there are no radio wave reflectors in close range. Compared to this, the intensity of the reflected radio waves is considerably larger. In this way, the returned radio waves enter the transmission amplification system if the electromagnetic shielding of the portable radio device's housing is incomplete. As a result, the returned electromagnetic waves are amplified again and radiated from the antenna, but the degree of amplification at this time is greater than the degree of attenuation from the antenna to the point where it passes through the radio wave reflector and enters the transmission amplification system. and. A positive feedback loop is formed, causing abnormal oscillation in the radio, making communication impossible.
この問題を解決するために、従来、筐体を電磁
的にしやへいする方法が取られている。通常、筐
体はプラスチツク等の樹脂でできているため、樹
脂ケースの内壁に、導電性薄膜を塗布している。
ところで、第１図に示すようにスピーカボツクス
１にスロツトあるいは丸穴２を設け、スピーカの
コーンの振動によつて、作り出される筐体内部の
空気振動を、筐体外部の空気へ有効に伝播できる
ようにしている。上記スロツトあるいは丸穴の開
口部の寸法は、空気の振動を有効に外部に伝える
ためには、ある程度大きく取る必要がある。この
ため、スロツト等の開口部から自己の放射電波が
筐体内部へ侵入し、電磁しやへいが不完全にな
る。この結果、従来の筐体構造では、前記異常発
振が起き易い欠点があつた。 In order to solve this problem, conventional methods have been used to electromagnetically shield the casing. Since the housing is usually made of resin such as plastic, a conductive thin film is coated on the inner wall of the resin case.
By the way, as shown in Fig. 1, a slot or a round hole 2 is provided in the speaker box 1 so that the air vibrations inside the housing created by the vibration of the speaker cone can be effectively transmitted to the air outside the housing. That's what I do. The opening of the slot or round hole needs to be large to some extent in order to effectively transmit air vibrations to the outside. For this reason, the self-radiated radio waves enter the inside of the casing through openings such as slots, resulting in incomplete electromagnetic shielding. As a result, the conventional housing structure has the disadvantage that the above-mentioned abnormal oscillation is likely to occur.
この考案は、従来のものの上記欠点を改善し、
筐体上のスピーカ用開口部分面積が大きくても、
完全な電磁しやへいを取ることのできるスピーカ
を提供することにある。 This invention improves the above-mentioned drawbacks of the conventional one,
Even if the opening area for the speaker on the housing is large,
The objective is to provide a speaker that can completely eliminate electromagnetic interference.
この考案によれば、スピーカ・コーン上に、ボ
イスコイル端子とは電気的に絶縁して導電性薄膜
層を設け、前記薄膜層を少なくとも１か所で接地
したことを特徴とするスピーカが得られる。 According to this invention, there is obtained a speaker characterized in that a conductive thin film layer is provided on the speaker cone, electrically insulated from the voice coil terminal, and the thin film layer is grounded at at least one place. .
以下、本考案を図面を用いて、詳細に説明す
る。 Hereinafter, the present invention will be explained in detail using the drawings.
第２図ａ，ｂは、本考案の一実施例の正面図と
そのＡ−A′断面図で、図において１はスピーカ
の外枠、５はスピーカの永久磁石部、６はボイス
コイル、７はスピーカコーンで、スピーカコーン
７上に導電性薄膜層３が塗布により設けられてい
る。この導電性薄膜層３は、ボイスコイル６の端
子４の取付部分を避けて塗布され、端子４とは電
気的に絶縁されている。又、この薄膜層３は、コ
ーンの振動エネルギーを減殺しない程度の可とう
性を持つリボン状金属薄膜３１を介して、スピー
カの金属製外枠１に接続されている。外枠１を無
線機筐体の内壁に塗布されたシールド用金属薄膜
に接するように固定すれば（第２図では外枠１上
の固定用取付穴は省略してある）、スピーカ前面
に開けられたスロツト等の開口部より侵入する電
磁波は、コーン７上の薄膜層上で反射あるいは減
衰し、前述のような、正帰還ループは形成されれ
ず。異常発振が起きない。 Figures 2a and 2b are a front view and a sectional view taken along the line A-A' of an embodiment of the present invention. In the figures, 1 is the outer frame of the speaker, 5 is the permanent magnet part of the speaker, 6 is the voice coil, and 7 1 is a speaker cone, and a conductive thin film layer 3 is provided on a speaker cone 7 by coating. This conductive thin film layer 3 is applied avoiding the portion of the voice coil 6 where the terminal 4 is attached, and is electrically insulated from the terminal 4. Further, this thin film layer 3 is connected to the metal outer frame 1 of the speaker via a ribbon-shaped metal thin film 31 that is flexible enough not to reduce the vibration energy of the cone. If the outer frame 1 is fixed so as to be in contact with the shielding metal thin film coated on the inner wall of the radio case (the fixing mounting holes on the outer frame 1 are omitted in Figure 2), then the holes can be opened in the front of the speaker. The electromagnetic waves that enter through the opening of the slot or the like are reflected or attenuated on the thin film layer on the cone 7, and the positive feedback loop as described above is not formed. Abnormal oscillation does not occur.
なお、以上においては、接地用リボン状金属薄
膜３１は、１つの場合を示したが、必要に応じ
て、複数個設置すれば、さらに、完全な電磁しや
へい効果が得られることは言うまでもない。 In the above, the case where one ribbon-shaped metal thin film 31 for grounding is used is shown, but it goes without saying that a more complete electromagnetic shielding effect can be obtained by installing a plurality of grounding ribbon-shaped metal thin films 31 as necessary. .
本考案によるスピーカを用いれば、携帯用無線
機におけるように、スピーカ用開口部を通して、
無線機筐体内に侵入することにより生じる異常現
象を防止するのに効果的である。 With the speaker according to the present invention, as in a portable radio, through the speaker opening,
This is effective in preventing abnormal phenomena caused by intrusion into the radio device housing.
第１図は一般のスピーカボツクスの正面図、第
２図ａ，ｂは本考案の一実施例の正面図とそのＡ
−A′断面図である。
１……スピーカボツクス筐体、２……スロツ
ト、３……導電性薄膜層、３１……接地用リボ
ン、４……ボイスコイル用端子、５……永久磁
石、６……ボイスコイル、７……コーン、８……
金属外枠。
Figure 1 is a front view of a general speaker box, and Figures 2 a and b are front views of an embodiment of the present invention and its A.
-A' sectional view. DESCRIPTION OF SYMBOLS 1... Speaker box housing, 2... Slot, 3... Conductive thin film layer, 31... Grounding ribbon, 4... Voice coil terminal, 5... Permanent magnet, 6... Voice coil, 7... ...Corn, 8...
Metal outer frame.
Claims (1)
的に絶縁して導電性薄膜層を設け、前記薄膜層を
少くとも１か所で接地したことを特徴とするスピ
ーカ。 A speaker characterized in that a conductive thin film layer is provided on the speaker cone so as to be electrically insulated from a voice coil terminal, and the thin film layer is grounded at at least one place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981006194U JPS62311Y2 (en) | 1981-01-19 | 1981-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981006194U JPS62311Y2 (en) | 1981-01-19 | 1981-01-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57119977U JPS57119977U (en) | 1982-07-26 |
| JPS62311Y2 true JPS62311Y2 (en) | 1987-01-07 |
Family
ID=29804519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981006194U Expired JPS62311Y2 (en) | 1981-01-19 | 1981-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62311Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5756087B2 (en) * | 1973-02-22 | 1982-11-27 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5756087U (en) * | 1980-09-17 | 1982-04-01 |
-
1981
- 1981-01-19 JP JP1981006194U patent/JPS62311Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5756087B2 (en) * | 1973-02-22 | 1982-11-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57119977U (en) | 1982-07-26 |
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