Abstract: Disclosed herein are industrial goggles. The goggles include a main body having protective glass and formed to correspond to a curvature of a face. A cover is hinged to one side of the front of the main body. A film unwinding roll has a film thereon. An unwinding-roll holding part vertically holds the film unwinding roll on one side of the main body and includes a stationary locking step, a movable locking step, and an elastic spring. A film winding shaft is provided vertically on the other side of the main body to wind the film from the film unwinding roll. A film feeding lever is coupled to the film winding shaft in a gear coupling manner and hinged to the main body. A ratchet means prevents the film feeding lever from rotating in a reverse direction. An elastic support member supports the main body against the face.

Abstract: A vortex tube includes a main body, an inlet coupled to the main body and into which compressed air is introduced, an air circulating chamber installed in the main body, a passage channel through which the air introduced through the inlet passes forwards, a vortex generator configured to enable the air to spin in the air circulating chamber, a cold air-outlet through which cold air is discharged outside from the air circulating chamber, and a hot air-outlet through which hot air is discharged outside from the air circulating chamber.

Abstract: A ventilation sole for footwear, in which an air inlet-outlet is formed in a side of the ventilation sole, vents are formed in an upper portion of the ventilation sole, the vents communicating with the air inlet-outlet, and a device for opening and closing an air inlet-outlet, which is coupled with the air inlet-outlet, supplies ambient air into the footwear. The device for opening and closing an air inlet-outlet is adapted to be opened or closed by a locking or unlocking action when turned, and is disposed in the air inlet-outlet such that it is exposed to the outside. Since the device is opened and closed by the turning action of the button cap, the user can conveniently open or close the air inlet-outlet.

Abstract: A ventilation sole for footwear, in which an air inlet-outlet is formed in a side of the ventilation sole, vents are formed in an upper portion of the ventilation sole, the vents communicating with the air inlet-outlet, and a device for opening and closing an air inlet-outlet, which is coupled with the air inlet-outlet, supplies ambient air into the footwear. The device for opening and closing an air inlet-outlet is adapted to be opened or closed by a locking or unlocking action when turned, and is disposed in the air inlet-outlet such that it is exposed to the outside. Since the device is opened and closed by the turning action of the button cap, the user can conveniently open or close the air inlet-outlet.