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 provides a multifunctional hydraulic buffer hinge. The multifunctional hydraulic buffer hinge comprises a first hinge, a second hinge, a screw rod, a sheath, a spring, a roller pin and a hydraulic oil cylinder, wherein the screw rod is sleeved with the sheath and is fixedly connected with the first hinge, the sheath is fixedly connected with the second hinge, the screw is provided with a hollow cavity, the spring and the hydraulic oil cylinder are arranged in the hollow cavity, one end of the spring is provided with an adjusting screw used for adjusting compression of the spring, the other end of the spring is abutted against the end face of the hydraulic oil cylinder, and the end of a push rod of the hydraulic oil cylinder is fixed on the screw. The outer wall of the screw is provided with a helical slot, the sheath is provided with a rolling slot, and the roller pin is arranged at the end of the hydraulic oil cylinder and penetrates the helical slot and the rolling slot. The multifunctional hydraulic buffer hinge has the advantages of simple structure, low manufacturing cost and long service life and the advantage that functions of automatic door closing by buffering, door stopping positioning, door closing speed and force adjusting are integrated.

The invention belongs to the field of fire prevention or inhibition, and particularly discloses a fireproof door which comprises a door frame, rolling door bodies matched with the door frame, and rotary shafts rotatably connected to the top of the door frame. The rolling door bodies are mounted on the rotary shafts. The fireproof door further a protective cover, a mounting rack, plastic bags, a telescopic plate, an electromagnet and a balance weight plate. The protective cover is arranged outside the rotary shafts in a covering mode. The mounting rack is fixed into the protective cover. The balance weight plate is fixed to the free ends of the rolling door bodies. The telescopic plate is connected between the protective cover and the balance weight plate. Reaction cavities are formed by the balance weight plate, the telescopic plate and the rolling door bodies. The two ends of the plastic bags are separately fixed to the protective cover and the balance weight plate. The rolling door bodies are provided with extinguishing ports. The electromagnet is fixed to the protective cover. The balance weight plate is an iron balance weight plate, and the balance weight plate and the electromagnet attract each other. The plastic bags are internally provided with a sodium bicarbonate solution. The reaction cavities are internally provided with an aluminum sulfate solution. By adoption of the scheme, the door can be automatically closed when a fire occurs, and operation is convenient.

The invention provides a refrigerator, including a box body, a door body, and a hinge assembly. The hinge assembly includes a hinge and a hinge shaft. The hinge is provided with a long installation slot. The refrigerator also includes an adjustment assembly. The stopper at one end of the long groove, the rotating piece installed on the hinge shaft and rotating with the hinge shaft, the rear end fixed on the hinge and the front end rotatably connected with the hinge shaft so that the outer contour of the rotating piece is always in contact with the stopper. The cooperation of the long installation groove, the stopper, the rotating member and the elastic member realizes the automatic door closing of the refrigerator door body and controls the maximum opening angle of the door body.

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 discloses a safety door lock. The safety door lock comprises a locking dog component, a driving assembly and a locking device. The locking dog component is installed in a lock case; the driving assembly is used for driving a stirring structure to make the locking dog component contract back into the lock case or stretch out of the lock case; the locking device is used for locking the contraction or stretching motion of the locking dog component. The stirring structure comprises a boosting plate and a resetting piece, wherein the boosting plate slides in the length direction of a front panel of the lock case and is fixedly arranged on a locking dog installation plate in the moving direction of the locking dog component, and the resetting piece applies resetting force to the boosting plate to make the boosting plate slide towards a driving shaft. From the perspective of position and shape, a boosting structure arranged on the boosting plate is characterized in that when the boosting structure is pushed by the driving assembly to move in the moving direction of the locking dog component, the boosting structure moves away from the driving assembly under the action of the driving assembly so as to avoid motion interference with the driving assembly; at the last rotation stage of the driving assembly, the boosting structure moves towards the driving assembly under the action of the resetting piece and stretches out of the position where the boosting structure partially coincides with the driving assembly in the moving direction of the locking dog component.

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.