JPS5959089U

JPS5959089U - earphone circuit

Info

Publication number: JPS5959089U
Application number: JP15423182U
Authority: JP
Inventors: 弘原
Original assignee: 株式会社富士通ゼネラル
Priority date: 1982-10-12
Filing date: 1982-10-12
Publication date: 1984-04-17

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のイヤホン回路図、第２図は従来の他の例
のイヤホン回路図、第３図は本考案によるイヤホン回路
の原理的電気回路図、第４図は本考案の他の例の電気回
路図、第５図はイヤホンピンの断面図、第６図は本考案
のさらに他の実施例の電気回路図である。１０・・・オーディオ信号入力端子、１１・・・音声出
力アンプ、１２・・・結合コンデンサ、１３・・・イヤ
ホン出力端子、１４・・・イヤホンジャック、１５・・
・信号入力用可動片、１６，１６ａ、１６ｂ・・・接地
片、１７・・・端子、１８・・・アッテネータ用抵抗、
１９・・・接触片、２ｄ・・・端子、２１・・・スピー
カ、２２・・・直流電源、２３・・・外部短絡回路（ジ
ャンパーリード線）、２４・・・第２可動片、２５・・
・イヤホンピン、２５ｂ・・・第２のピン、２６・・・
接触頭部、２７゜２７ａ、　２７ｂ−・・絶縁性リング
、２８．２８２゜２８ｂ・・・接地リング。Fig. 1 is a conventional earphone circuit diagram, Fig. 2 is an earphone circuit diagram of another conventional example, Fig. 3 is a principle electric circuit diagram of the earphone circuit according to the present invention, and Fig. 4 is another example of the present invention. FIG. 5 is a sectional view of the earphone pin, and FIG. 6 is an electrical circuit diagram of still another embodiment of the present invention. 10... Audio signal input terminal, 11... Audio output amplifier, 12... Coupling capacitor, 13... Earphone output terminal, 14... Earphone jack, 15...
・Movable piece for signal input, 16, 16a, 16b... Ground piece, 17... Terminal, 18... Attenuator resistor,
19... Contact piece, 2d... Terminal, 21... Speaker, 22... DC power supply, 23... External short circuit (jumper lead wire), 24... Second movable piece, 25...・
・Earphone pin, 25b...Second pin, 26...
Contact head, 27°27a, 27b--insulating ring, 28.282°28b--grounding ring.

Claims

[Scope of utility model registration request]

(1) An earphone jack is connected to the output side of the output amplifier, and an attenuator resistor inserted between the ground piece of the earphone jack and the ground, and a short circuit provided outside the earphone jack to short-circuit the attenuator resistor. An earphone circuit comprising:

(2) Utility Model Registration Scope of Claim 1. In the earphone circuit described in claim 1, the short circuit is a jumper lead wire.

(3) Scope of Utility Model Registration Claims In paragraph 1, the short circuit is a second short circuit provided in the earphone jack and directly grounded.
An earphone circuit in which the movable piece of the earphone jack and the grounding piece of the earphone jack are short-circuited by the grounding ring of the earphone pin.

(4) Scope of Utility Model Registration Claims In paragraph 1, the short circuit is a second short circuit provided in the earphone jack and directly grounded.
a movable piece, a first grounding ring provided on the earphone pin and coupled to the second movable piece, and a second grounding ring provided on the earphone pin and coupled to the grounding piece of the earphone jack, An earphone circuit in which the first and second grounding rings are short-circuited inside the earphone pin.

(5) In the scope of claims for utility model registration, described in paragraph 1. The short circuit consists of a second grounding piece provided on the earphone jack and directly grounded, and a second pin provided on the earphone pin and coupled to the second grounding piece, and a grounding ring and a second grounding piece provided inside the earphone pin. An earphone circuit designed to short-circuit the pins. ′