INTAKE PIPE UNION STRUCTURE OF GAS MASK FOR COUPLING NIPPLE TO INTAKE PIPE EASILY AND STABLY AND IMPROVING COMPATIBILITY OF PRODUCT ACCORDING TO PHYSICAL PROPERTIES OF USER

摘要

PURPOSE: An intake pipe union structure of a gas mask is provided to couple a nipple to the intake pipe easily and stably and improve the compatibility of the product according to the physical properties of a user. CONSTITUTION: The intake pipe(10) comprises: an intake cylinder(1) having a female screw part(1a) and a stop groove(1b) formed on the inner circumferential surface through which an inlet hole for introducing beverage is penetrated; an intake pipe fixing tube(2) and an intake pipe fixing ring(3) for fixing the intake cylinder(1) on a face piece; and an intake straw(4) of soft material connected to one side of the intake cylinder(1). A screw nipple(8) and a screw cap(7) connected to the intake pipe are provided with male screw parts(7a,8a) for screw-coupling to the female screw part(1a) and stop ridges(7b,8b) for forcedly coupling to the stop recess(1b).