Abstract: Disclosed is an information display and control device of a powered air purifying respirator wherein air flow of a blower device is electronically detected using a precision air flow sensor mounted to the blower device without using an air flow display device, and a graphic screen that displays an air flow level meter is displayed on the blower device or an additionally manufactured remote controller so that the air flow of the blower device can be checked during operation. The information display and control device includes a remote controller that is capable of allowing a worker to inspect an air flow state, to detect remaining battery power and expected use time, and to manipulate a blower device and exchanging information even in a state in which the worker wears the air purifying respirator and the blower device.

Abstract: Disclosed is a cushion for headbands in which a rear cushion cover is connected to a connection case connected to one selected from a welding mask, a working helmet, a protective mask and a safety helmet and a medical device, and a space recess having the shape of a curved surface is formed on the rear surface of the connection case so that a space having the shape of the cushion cover may be formed between a pad of the cushion cover and the rear surface of the connection case when the cushion cover is connected to the rear surface of the connection case, thereby providing excellent cushion feeling to a wearer when contacting the wearer's head and not causing inconvenience even when the cushion for headbands is worn for a long time.

Abstract: Disclosed is a headband with an air cushion pad, which is mounted on a welding mask, a working helmet, a safety mask or a protective mask. A plurality of air pockets is arranged at regular intervals or asymmetrical intervals within the air cushion pad mounted on the entirety or a part of the headband contacting the worker's head, a plurality of projections is formed on the front surface of the air cushion pad contacting the worker's head, the worker's forehead or the rear portion of the worker's head, and if the worker wears the headband, the amount of air filling air pockets is adjusted according to a shape of the worker's head or a pressing degree of the headband onto the worker's head so that the worker may firmly and comfortably wear the headband under the condition that the headband is completely adhered to the worker's head.