JPS58153851U

JPS58153851U - Valve device for dust mask

Info

Publication number: JPS58153851U
Application number: JP5224482U
Authority: JP
Inventors: 健治山本
Original assignee: 山本光学株式会社
Priority date: 1982-04-08
Filing date: 1982-04-08
Publication date: 1983-10-14

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図乃至第４図は本考案の実施例を示しており、第１
図は防塵マスクの正面図、第２図は第１図の■−■線断
面図、第３図は排気弁装置の分解−斜視図、第４図は弁
装置の要部の縦断面図、第５図は弁装置の第２実施例の
要部の縦断面図である。　　１・・・・・・防塵マスク
、２・・・・・・マスク本体、１４・・・・・・排気弁
装置、１７・・・・・・弁本体；１８・・・・・・弁部
材、２５・・・・・・排気用空気流通口、２６・・・・
・・弁座、２９・・・・・・弁部、３７・・・・・・周
縁部、３８・・・・・・接当面。1 to 4 show embodiments of the present invention, and the first
The figure is a front view of the dust mask, Figure 2 is a sectional view taken along the line ■-■ in Figure 1, Figure 3 is an exploded perspective view of the exhaust valve device, and Figure 4 is a longitudinal sectional view of the main parts of the valve device. FIG. 5 is a longitudinal sectional view of the main parts of the second embodiment of the valve device. 1...dust mask, 2...mask body, 14...exhaust valve device, 17...valve body; 18...valve member , 25... Exhaust air vent, 26...
... Valve seat, 29 ... Valve part, 37 ... Peripheral part, 38 ... Contact surface.

Claims

[Scope of utility model registration request]

A dustproof valve body 17 having an air flow port 25 and a valve seat 28 is provided with a valve member 18 made of an elastic material that opens and closes the air flow port 25 by having its peripheral edge 37 contact the valve seat 26 so as to be able to freely move toward and away from the valve seat 26. In the valve device for a dust mask, the valve seat abutting surface 38 of the peripheral edge portion 37 of the valve member 18 has a radial cross-sectional shape formed into an arcuate surface projecting toward the valve seat 26 side. Valve device.