Coupler for air breathing apparatus

Abstract

The present invention relates to a coupler for an air respirator. The present invention comprises: a socket body having a through steel ball receiving hole for receiving a master ball and a hollow sleeve installed on the outer peripheral surface thereof; a hollow plug body coupled to the socket body, a discharge tube of an apparatus for supplying fluid being coupled thereto; a stopper for restraining the sleeve to fix the sleeve at a moved location; a locking unit which interlocks with the sleeve moved along the socket body and restrains a part of the master ball at the plug body, thereby locking the plug body coupled to the socket body; and an unlocking unit which interlocks with the sleeve and releases the restraints of the sleeve restrained at the stopper and the master ball restrained at the plug body, thereby unlocking the locked plug body, wherein the unlocking unit includes a first unlocking unit and a second unlocking unit. In the present invention, the unlocking is possible only when the unlocking is conducted in a first step and a second step.

Description

technical field [0001] The present invention relates to a coupler for an air respirator, and more specifically, to a coupler for an air respirator that connects an air valve of an air tank and a hose in an unblockable manner. Background technique [0002] Generally speaking, the air supply device for respiratory protection, that is, the air respirator, is used in industrial sites that produce harmful gases and dust or in sites lacking oxygen such as inspection shafts in mining pits, or in fire sites to prevent lifeguards (firefighters) from inhaling the operating site. Toxic gas, used for breathing protection, by forming an air supply valve and an exhaust valve on the face piece, the compressed air stored in the air tank is released through a hose, one or more regulators, and an air supply valve. It is supplied to the inside of the mask, and the exhaled air generated by the user's breathing is discharged to the outside through the exhaust valve. [0003] figure 1 It is a d...

AI Technical Summary

Problems solved by technology

[0008] However, if the coupler adopts a press-fit structure, although it is easy to realize the coupling action of the plug and the socket, compared with the coupling stability, most of them are designed for the convenience of coupling, and the locking structure for maintaining the coupling state is relatively simple. The locked state with the socket can be easily released by any unexpected external force, that is, it can be easily released even with a slight external force

Therefore, operators such as firefighters who work in areas with toxic substances, when the coupler is caught or pressurized by surrounding protrusions, etc., will be faced with the problem that the lock from the air container to the mask will occur due to the unlocked state of the plug and socket. Accidents in which the air supply was interrupted

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