JPH01113489U

JPH01113489U -

Info

Publication number: JPH01113489U
Application number: JP10730088U
Authority: JP
Priority date: 1988-08-13
Filing date: 1988-08-13
Publication date: 1989-07-31

Description

[Brief explanation of the drawing]

第１図は従来のヘツドホンの低音特性図、第２
図及び第３図は従来型ヘツドホンの中心縦断面図
とその音響等価回路図、第４図〜第６図は本考案
によるイヤホンの一実施例を示すもので、第４Ａ
図は中心縦断面図、第４Ｂ図は外観斜視図、第５
図は音響等価回路図、第６図は音圧特性図、第７
図は従来型と本考案によるものとの音圧―周波数
特性比較図である。なお図面に用いた符号において、１……マグネ
ツト、２……ヨーク、３……プレート、４……磁
気ギヤツプ、５……ボイスコイル、６……振動板
、７……ドライバーユニツト（音響変換器）、２
０……筐体、２２……ダクト、２２ａ……ダクト
上部、２２ｂ……ダクト下部、２４……開口、２
６……透孔、２７……制動板、である。 Figure 1 shows the bass characteristics of conventional headphones;
Figures 4 and 3 show a central longitudinal sectional view of a conventional headphone and its acoustic equivalent circuit diagram, and Figures 4 to 6 show an embodiment of the earphone according to the present invention.
The figure is a central vertical sectional view, Figure 4B is an external perspective view, and Figure 5
The figure is an acoustic equivalent circuit diagram, Figure 6 is a sound pressure characteristic diagram, and Figure 7 is a sound pressure characteristic diagram.
The figure is a comparison diagram of the sound pressure-frequency characteristics of the conventional type and the one according to the present invention. In addition, in the symbols used in the drawings, 1...Magnet, 2...Yoke, 3...Plate, 4...Magnetic gap, 5...Voice coil, 6...Diaphragm, 7...Driver unit (acoustic transducer) ), 2
0... Housing, 22... Duct, 22a... Duct upper part, 22b... Duct lower part, 24... Opening, 2
6... through hole, 27... brake plate.

Claims

[Scope of utility model registration request]

Consisting of an acoustic transducer and a casing to which the acoustic transducer is installed, a duct is provided in the casing to emit sound emitted from the rear surface of the acoustic transducer to the outside, and a cord is inserted through the duct to connect the casing. A headphone characterized in that the duct is led out of the body and the opening of the duct is directed downward.