32results about How to "Realize automatic door closing" patented technology

The invention provides a hinge device and a refrigerator with the same. The hinge device comprises an adjusting assembly and a hinge assembly connecting a refrigerator body and a door body, the hinge assembly comprises a hinge arranged on the refrigerator body and a hinge shaft arranged on the door body, and the hinge is provided with a mounting long groove for the hinge shaft to penetrate through; the adjusting assembly comprises a check block arranged on the hinge, a rotating piece mounted on the hinge shaft and rotating along with the hinge shaft and an elastic piece acting on the outer contour of the rotating piece to abut against the check block all the time, and the outer contour of the rotating piece comprises a first position and a second position; the first distance between the first position and the hinge shaft is smaller than the second distance between the second position and the hinge shaft, and when the door body is closed, the first position makes contact with the check block; and when the door body is opened, the hinge shaft drives the rotating piece to rotate so that the second position makes contact with the check block, and the hinge shaft moves in the mounting long groove. Through cooperation of the mounting long groove, the check block, the rotating piece and the elastic piece, automatic door closing of the door body is achieved, and the maximum door opening angle of the door body is controlled.

The invention discloses an automatic rotation door device, and relates to the field of building moving type closing devices. The automatic rotation door device includes a door shaft and a door sash. The front and back of the door sash are provided with liquid bladders. The door shaft is internally provided with a hydraulic cylinder. A piston rod of the hydraulic cylinder is provided with outer threads. Pipelines are arranged between the liquid bladders on the front and back of the door and the hydraulic cylinders. The inner wall of each pipeline is connected with a baffle plate tilting towardsone side of the hydraulic cylinder. The other side of the connecting position of each baffle plate and the corresponding pipeline is provided with a blocking part used for limiting tilting of the baffle plate towards the liquid bladder direction. A flexible assembly is arranged between each baffle plate and each pipeline inner wall. A groove is formed in the door shaft. A rotation block insertedinto the groove is fixedly connected to the door sash. The rotation block is in rotation cooperation with the groove. The rotation block is internally provided with a cylindrical groove. The surface of the cylindrical groove is provided with inner threads matched with the outer threads of the piston rod. According to the automatic rotation door device, the problem that an existing rotation door which does not consume electricity cannot be opened and closed automatically is solved; the automatic rotation door device is mainly used in a family or a public area; through action of own gravity of people, automatic opening and closing of the door sash can be achieved.

The invention relates to the technical field of paper folding processes, in particular to a paper folding method of door closing folding. The paper folding method comprises the following process steps: an arc hole guide block, a U-shaped hole guide block, a return hole guide block, a strip hole guide block and a V-shaped hole guide block are arranged on a horizontal guide rail in sequence; a starting end of a paper slip penetrates through the arc hole guide block, the U-shaped hole guide block, the return hole guide block, the strip hole guide block and the V-shaped hole guide block in sequence; the starting end of the paper slip is pulled, and firstly, the paper slip passes through the arc hole guide block to be folded to an arc shape; then, the paper slip passes through the U-shaped hole guide block to be folded to a U shape; then, the paper slip passes through the return hole guide block to be folded to a return shape; then, the paper slip passes through the strip hole guide block to be folded to a strip shape; then, the paper slip passes through the V-shaped hole guide block to be folded to a V shape; and the door closing folding of the paper slip is finished. The paper folding method not only can save the manpower, improve the production efficiency and reduce the production costs for enterprises, but also can satisfy the production under different environments.