JPS60181949U

JPS60181949U - handset

Info

Publication number: JPS60181949U
Application number: JP6992984U
Authority: JP
Inventors: 隆明加瀬; 準一田中
Original assignee: 三菱電機株式会社
Priority date: 1984-05-14
Filing date: 1984-05-14
Publication date: 1985-12-03

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は、従来の騒音用電話器機の送受話器の要部断面
図、第２図はこの考案の一実施例による送受話器の要部
断面図、第３図、第４図はこの考案の送受話器の機能を
説明するための感度−周波数特性図、第５図はこの考案
の送受話器の指向性を説明する感度−周波数特性図、第
６図はこの考案の他の実施例を示す要部断面図である。図において、１．１１はハンドセット筐体、２．１２は
開口、３はスリット、４，１４は振動板、５．１６は永
久磁石、６．１５はボイスコイル、７，１７はヨーク、
８は増幅器、１３は背面開口、１８は音響管、１９はフ
レーム、２０は制動材、２１は吸音材である。なお各図
中の同一符号は同一または相当部分を示すものとする。Figure 1 is a cross-sectional view of the main parts of a handset and receiver of a conventional noise-reducing telephone device, Figure 2 is a cross-sectional view of the main parts of a handset according to an embodiment of this invention, and Figures 3 and 4 are FIG. 5 is a sensitivity-frequency characteristic diagram to explain the functions of the handset, FIG. 5 is a sensitivity-frequency characteristic diagram to explain the directivity of the handset of this invention, and FIG. 6 is a diagram showing another embodiment of this invention. FIG. In the figure, 1.11 is a handset housing, 2.12 is an opening, 3 is a slit, 4 and 14 are diaphragms, 5.16 is a permanent magnet, 6.15 is a voice coil, 7 and 17 are yokes,
8 is an amplifier, 13 is a rear opening, 18 is an acoustic tube, 19 is a frame, 20 is a damping material, and 21 is a sound absorbing material. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

- In a handset using an electrodynamic microphone as a transmitter, a sound path passing through the top and bottom of a magnetic circuit arranged on the back side of a diaphragm, and an acoustic tube coupled to the sound path at the bottom of the magnetic circuit; The speaker is characterized by comprising a casing that incorporates the sound path and the acoustic tube and has an opening in a portion that contacts the acoustic tube, and a sound absorbing material installed around the opening of the casing. handset.