Abstract: A rotatably adjustable face mask valve includes a valve seat, a flap and a valve cover. The valve cover includes a fixed member and a movable member that is movable to different height positions relative to the fixed member and includes a pressing portion. When a user holds and rotates the movable member, the pressing portion is movable between a closed position of pressing against the flap, and an open position of separating from the flap. An opening on the valve seat is constantly in a blocked state when the pressing portion is in the closed position, or is subject to user's exhalation to change between the blocked state and a circulating state when the pressing portion is in the open position. Thus, the user may adjust the usage state of the face mask valve according to personal need and change the way the exhaled air leaves the face mask.

Abstract: A mask includes a main body, mask cord and cord lock. The cord lock is made of an elastic material and movably attached to the mask cord for adjusting a circle contour formed by the main body, mask cord and cord lock for putting around a user's head. The cord lock includes a locking portion connected to a grip portion that internally defines a receiving space and the grip portion is divided into a deformable zone and a supporting zone. A smaller circle contour is adjustable to a larger one through deformation of the deformable zone, which allows the cord lock to move closer to the head and release some length of the mask cord that is originally received in the receiving space for expanding the circle contour. Meanwhile, the cord lock and the mask cord do not slide relative to each other and the mask maintains secure seal.

Abstract: A retractable respiratory mask of the present invention comprise a worn portion, a filter portion adapted to connect with a filter member, and a retractable portion; the retractable portion connected between the worn portion and the filter portion comprises a first bend portion, a second bend portion and a displacement section. The two bend portions are spaced apart from each other and the displacement section is connected between the two bend portions. The retractable respiratory mask of the present invention can change the relative position between the two bend portions by folding over the displacement section. The retractable respiratory mask shows an extended shape when the first bend portion and the second bend portion are orderly arranged in an extending direction, and conversely shows a contracted shape when two bend portions are arranged along the opposite direction. By doing so, the mask can be folded up to reduce entire volume.

Abstract: A retractable respiratory mask of the present invention comprise a worn portion, a filter portion adapted to connect with a filter member, and a retractable portion; the retractable portion connected between the worn portion and the filter portion comprises a first bend portion, a second bend portion and a displacement section. The two bend portions are spaced apart from each other and the displacement section is connected between the two bend portions. The retractable respiratory mask of the present invention can change the relative position between the two bend portions by folding over the displacement section. The retractable respiratory mask shows an extended shape when the first bend portion and the second bend portion are orderly arranged in an extending direction, and conversely shows a contracted shape when two bend portions are arranged along the opposite direction. By doing so, the mask can be folded up to reduce entire volume.