JPH0457950U

JPH0457950U -

Info

Publication number: JPH0457950U
Application number: JP9968390U
Authority: JP
Priority date: 1990-09-21
Filing date: 1990-09-21
Publication date: 1992-05-19

Description

[Brief explanation of the drawing]

第１図は本考案によるハンドセツト構造の断面
図、第２図は同ハンドセツト構造に用いる両面開
放型受話器の背面図、第３図は同ハンドセツト構
造の周波数特性図、第４図は実験例の周波数特性
図、第５図は従来のハンドセツト構造の断面図、
第６図は従来の両面開放型受話器の断面図である
。１……ハンドセツトケース、１ａ……内ケース
、２……ハンドセツトカバー、３……前室、４…
…受話口通気穴、６……両面開放型受話器、６ｂ
……振動板、６ｃ……背面放音孔、７……通気孔
、１０……ダンパ膜、１１……吸音材、１２……
遮蔽板。 Fig. 1 is a cross-sectional view of the handset structure according to the present invention, Fig. 2 is a rear view of the double-sided open receiver used in the handset structure, Fig. 3 is a frequency characteristic diagram of the handset structure, and Fig. 4 is the frequency of the experimental example. Characteristic diagram, Figure 5 is a sectional view of the conventional handset structure,
FIG. 6 is a sectional view of a conventional double-sided open type telephone receiver. 1... Handset case, 1a... Inner case, 2... Handset cover, 3... Front chamber, 4...
...Earpiece vent hole, 6...Double-sided open receiver, 6b
...Diaphragm, 6c...Back sound emitting hole, 7...Vent hole, 10...Damper membrane, 11...Sound absorbing material, 12...
Shield.

Claims

[Scope of utility model registration request]

In a handset structure in which an inner case is provided inside the handset case facing the earpiece ventilation hole to partition the handset internal space and the front chamber, and the handset is attached to the inner case, the handset internal space and the front chamber are communicated. forming a ventilation hole in the inner case, covering at least a portion of the ventilation hole with a damper membrane, and shielding at least a portion of the rear sound emission hole of the double-sided open type handset to be attached to the inner case with a shielding plate;
A handset structure characterized in that a sound absorbing material is arranged in the interior space of the handset.