JPS61206390U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

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）、１８…ダクト部、
２０…筐体、２２…筒状部、２６…透孔、２７…
制動板である。 Figure 1 shows the bass characteristics of conventional headphones;
3 and 3 show a central vertical cross-sectional view of a conventional headphone and its acoustic circuit diagram, FIGS. 4 to 6 show an embodiment of the earphone according to the present invention, and FIG. 4A is a central vertical cross-sectional view, FIG. 4B is an external perspective view, FIG. 5 is an acoustic circuit diagram, FIG. 6 is a sound pressure characteristic diagram, and FIG. 7 is a sound pressure-frequency characteristic comparison diagram 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), 18... duct section,
20... Housing, 22... Cylindrical part, 26... Through hole, 27...
It is a brake plate.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 音響変換器とこの音響変換器が取付けられる筐
体とから成り、この筐体が上記音響変換器の後面
より出る音を外部に放出するためのダクト部を具
備し、このダクト部の長さが可変であることを特
徴とするヘツドホン。 It consists of an acoustic transducer and a casing to which the acoustic transducer is attached, and the casing is equipped with a duct section for emitting sound emitted from the rear surface of the acoustic transducer to the outside, and the length of the duct section is A headphone characterized by being variable.