Abstract: A balance explosion-proof valve includes a valve body, a pressure relief assembly assembled on the valve body, and an air pressure balance assembly assembled on the pressure relief assembly. The valve body includes an outer ring body, an inner ring body, and connecting arms connected to an inner surface of the outer ring body and an outer surface of the inner ring body. The pressure relief assembly includes a piston pressed against a surface of the outer ring body, a waterproof breathable membrane, an upper cover plate, and a magnetic sheet covering the waterproof breathable membrane. The waterproof breathable membrane is coupled to the piston. The air pressure balance assembly is installed on the piston and passes through the central sleeve hole. The piston includes an inner concave cavity, a pressing step protruding from the inner concave cavity, and an outer ring portion protruding from the pressing step.

Abstract: An extending-type functional assembly is mounted on a frame of a smart terminal, and electrically connected to a control unit of the smart terminal. The extending-type functional assembly comprises a body, a camera module, and a driving. The body comprises a rotating end and a free end, the rotating end is rotatably connected to the frame of the smart terminal, and the free end can be rotated into or out of the frame of the smart terminal. The camera module is disposed on the body, and the body can drive the camera module to move. When the free end is rotated out of the frame of the smart terminal, the camera module is exposed from the frame of the smart terminal; when the rotating end is rotated into the frame of the smart terminal, the camera module is hidden in the frame of the smart terminal.

Abstract: An extending-type functional assembly is mounted on a frame of a smart terminal, and electrically connected to a control unit of the smart terminal. The extending-type functional assembly comprises a body, a camera module, and a driving module. The body comprises a rotating end and a free end, the rotating end is rotatably connected to the frame of the smart terminal, and the free end can be rotated into or out of the frame of the smart terminal. The camera module is disposed on the body, and the body can drive the camera module to move. When the free end is rotated out of the frame of the smart terminal, the camera module is exposed from the frame of the smart terminal; when the rotating end is rotated into the frame of the smart terminal, the camera module is hidden in the frame of the smart terminal.