JPH0113498Y2

JPH0113498Y2 -

Info

Publication number: JPH0113498Y2
Application number: JP17789584U
Authority: JP
Priority date: 1984-11-22
Filing date: 1984-11-22
Publication date: 1989-04-20
Also published as: JPS6193087U

Description

【考案の詳細な説明】（産業上の利用分野）この考案は、天井または壁面に埋込むのに適し
たスピーカに関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a speaker suitable for being embedded in a ceiling or wall surface.

（従来の技術）従来、実公昭51−37490のように円錐台形の金
属製密閉構造中にスピーカを収容するようにした
天井埋込型のパネルコーンスピーカがあつた。(Prior Art) Conventionally, there has been a ceiling-embedded panel cone speaker, such as Japanese Utility Model Publication No. 51-37490, in which the speaker is housed in a truncated cone-shaped metal sealed structure.

（考案が解決しようとする問題点）ところが、このようにスピーカは塵埃の侵入や
ねずみなどの小動物による害をうけず、耐熱性に
も優れ、火災からスピーカをよく防護することが
できたのであるが、スピーカ振動板の振動が円錐
台形金属に伝達され寄生振動を生ずるほか、密閉
構造であるため音がこもるなど音響的には不快な
ものであつた。(The problem that the invention aims to solve) However, in this way, the speaker was not harmed by the intrusion of dust or small animals such as mice, had excellent heat resistance, and was able to protect the speaker well from fire. However, the vibration of the speaker diaphragm is transmitted to the truncated cone-shaped metal, causing parasitic vibrations, and the closed structure muffles the sound, making it acoustically unpleasant.

（実施例）この考案は上記従来の問題点を解消したスピー
カを提供するもので、以下図面に示す実施例に基
づいてその詳細を説明する。(Embodiment) This invention provides a speaker that solves the above-mentioned conventional problems, and the details thereof will be explained below based on the embodiment shown in the drawings.

この考案のスピーカは第１図および第２図に示
すように、一端が開口した容器状フレーム１０に
はほぼ全周面に多数の微細な連通孔１１を有する
合成樹脂または金属の発泡体あるいは焼結体で一
体に形成され、フレーム１０の内底部に磁気回路
１２がネジ１３で取付けられ、フレーム１０の中
間に形成された段差部１４にボイスコイルボビン
２０、ダンパー１６、振動板２１、防塵キヤツプ
２２などからなる振動系１５を弾性支持するダン
パー１６の周辺部が接着剤等で固定されている。 As shown in FIGS. 1 and 2, the speaker of this invention is made of synthetic resin or metal foam or sintered material having a container-like frame 10 with one end open and a large number of fine communication holes 11 on almost the entire circumference. A magnetic circuit 12 is attached to the inner bottom of the frame 10 with screws 13, and a voice coil bobbin 20, a damper 16, a diaphragm 21, and a dustproof cap 22 are attached to a step 14 formed in the middle of the frame 10. A peripheral portion of a damper 16 that elastically supports a vibration system 15 consisting of a vibration system 15, etc., is fixed with an adhesive or the like.

このコーンスピーカはフレーム１０の開口端フ
ランジ部１７がネジ１８で前面パネル１９の裏面
側に取付けられている。フレーム１０の材質とし
ては、ポリウレタンなどの発泡容易な合成樹脂や
焼成容易な焼結合金が利用できるか、火災発生時
の緊急放送時等にも使用しうるように耐熱性に優
れた材料を選択するのが望ましい。 In this cone speaker, an open end flange portion 17 of a frame 10 is attached to the back side of a front panel 19 with screws 18. As for the material of the frame 10, a synthetic resin that can be easily foamed such as polyurethane, a sintered alloy that is easy to fire, or a material that has excellent heat resistance is selected so that it can be used for emergency broadcasts in the event of a fire. It is desirable to do so.

振動系１５に対するフレーム１０の表面連通孔
の開口率は、通常30〜40％程度となるように、発
泡条件が定められている。 The foaming conditions are determined so that the aperture ratio of the surface communication holes of the frame 10 with respect to the vibration system 15 is usually about 30 to 40%.

この考案のスピーカは上記のように連通口を有
するフレームでスピーカの全周を覆うこスピーカ
を組立てるときは、まずフレーム１０の内底部に
磁気回路１２をネジ１３で固定し、これと同心と
なるように治具（図示せず）を用いてボイスコイ
ルボビン２０を組込んでダンパー１６を接着固定
し、振動板２１と防塵キヤツプ２２を組込む。 As described above, the speaker of this invention has a frame with a communication port that covers the entire circumference of the speaker.When assembling the speaker, first fix the magnetic circuit 12 to the inner bottom of the frame 10 with screws 13, and make the magnetic circuit 12 concentric with this. Using a jig (not shown), the voice coil bobbin 20 is assembled, the damper 16 is adhesively fixed, and the diaphragm 21 and dustproof cap 22 are assembled.

（作用）この考案のスピーカは上記のように全面に連通
口１１を有する円錐台形のクレーム１０でスピー
カの全背面を覆つているから、微細な連通孔１１
には振動板２１が振動することによる空気流のフ
イルターの役目を果たし、振動系１５の背圧が均
等化して、音を歪ませたりすることはない。ま
た、振動板２１の振動もフレーム１１の多孔性構
造で吸収され、寄生振動を生ずることもないなど
音質はすこぶる良好に改善しうる。(Function) Since the speaker of this invention covers the entire back surface of the speaker with the truncated conical claim 10 having the communicating holes 11 on the entire surface as described above, the fine communicating holes 11
The vibration of the diaphragm 21 acts as a filter for the air flow, and the back pressure of the vibration system 15 is equalized, so that the sound is not distorted. Furthermore, the vibrations of the diaphragm 21 are also absorbed by the porous structure of the frame 11, and the sound quality can be greatly improved, with no parasitic vibrations occurring.

（考案の効果）上述のようにこの考案によれば、フレーム自体
にスピーカを取付ける作業だけで、別個の部品や
これを取付ける作業を必要とすることなく、埋込
型に適したスピーカを安価に製造し提供すること
ができる。(Effects of the invention) As mentioned above, according to this invention, a speaker suitable for an embedded type can be manufactured at low cost by simply attaching the speaker to the frame itself, without requiring separate parts or installation work. can be manufactured and provided.

[Brief explanation of the drawing]

第１図は本考案を実施したパネルコーンスピー
カの一部切欠側面図、第２図は同じく斜視図であ
る。１０……フレーム、１１……連通孔、１２……
磁気回路、１４……段差部、１５……振動系、１
６……ダンパー。 FIG. 1 is a partially cutaway side view of a panel cone speaker embodying the present invention, and FIG. 2 is a perspective view of the same. 10... Frame, 11... Communication hole, 12...
Magnetic circuit, 14... Step portion, 15... Vibration system, 1
6...Damper.

Claims

[Scope of utility model registration request]

A frame having a container shape with one end open and a stepped part formed in the middle and a large number of fine communication holes formed around the entire circumference by foaming or sintering, a magnetic circuit built into the inner bottom of the frame, and the frame. A ceiling-embedded speaker comprising a damper and a vibration system arranged coaxially with the magnetic circuit.