42results about How to "Control opening size" patented technology

The invention relates to the technical field of medical equipment, in particular to a beam-limiting device blade driving device which is used for driving blades of a beam-limiting device. The beam-limiting device blade driving device comprises an upper-layer plate, a lower-layer plate, a rotating wheel, four hinge pins and four blade fixing and transmitting mechanisms, wherein the rotating wheel is horizontally arranged below the upper-layer plate, four pin holes are distributed in the rotating wheel in a central symmetry mode, and the rotating wheel is fixed to the lower surface of the upper-layer plate through a flange; the four hinge pins penetrate through the pin holes respectively and are arranged vertically; the four blade fixing and transmitting mechanisms are arranged at the lower ends of the four hinge pins respectively. The invention further provides the beam-limiting device provided with the beam-limiting device blade driving device and an X-ray machine. The beam-limiting device blade driving device is simple in structure, low in cost and easy to maintain.

The application discloses an epitaxial structure and its manufacturing method, which is located on the first carrier supply layer on the substrate; the control structure is located on the first carrier supply layer, including multiple quantum well layers; multiple V-shaped depressions , extending from the surface of the regulating structure into the regulating structure; and a second carrier supply layer located on the regulating structure, wherein at least two V-shaped depressions are different. The epitaxial structure of the present invention controls the extension depth of each V-shaped depression in the control structure through the regulating structure, which not only improves the uniformity of the distribution of the V-shaped depressions in the longitudinal direction of the epitaxial structure, disperses the stress, but also increases the mechanical strength of the epitaxial structure. The uniformity of intensity, thereby improving the internal quantum efficiency of the light-emitting element.

The invention relates to a multifunctional umbrella structure with holes. The multifunctional umbrella structure comprises ribs, an umbrella rod and an umbrella cover. The ribs are connected to the umbrella rod. The umbrella cover is connected to the ribs and provided with the through holes. The through holes are formed in the umbrella cover; when the wind is strong, the umbrella cover is not prone to being lifted up; when the multifunctional umbrella structure is used in the sun, part of sunshine can enter the multifunctional umbrella structure, a small amount of sunshine can be received while the sun-resistant effect is achieved, and the body immunity can be improved.

The invention relates to a manual tightly-pressing tool for lap joint of colorful plate tiles and an operating method of the manual tightly-pressing tool. The manual tightly-pressing tool comprises asupport, an undercutblock and a limiting block, the lower portion of the support and the upper portion of the undercut block are hinged through a rotary shaft, and the upper side and the lower side ofthe rotary shaft are fixedly provided with a limiting handle and a connecting rod correspondingly. The limiting block is arranged on the connecting rod in an adjustable mode, a pressing shaft is arranged on the upper portion of the undercut block, and an undercut tooth is arranged on the lower portion of the undercut block. A rotatable transmission shaft and a gear set capable of increasing torque are arranged on the upper portion of the support, an undercut handle is fixed to the upper side of the transmission shaft, and an input gear of the gear set is coaxially connected with the transmission shaft. One end of a transmission rod is eccentrically hinged to an output gear of the gear set, and the other end of the transmission rod is hinged to the pressing shaft. The pressing shaft and the limiting block are located on the two sides of the rotary shaft correspondingly. During work, after the undercut handle and the limiting handle are operated, the undercut block tightly presses the one side of the lap joint in an undercut mode, and the limiting block tightly presses the other side of the lap joint in a limiting mode. Through the manual tightly-pressing tool, the water leakage phenomenon is avoided, tile faces are not prone to being damaged, operating is easy and capable of saving labor, the efficiency is high, the construction accuracy is high, and the cost is low.

The invention provides a gasahol pump which comprises a valve jacket, an end cover and a suction pipe, and is characterized in that a pump assembly consists of a ferrule, an inner inserted link, a spring and a button switch, wherein the suction pipe is connected at the bottom of the ferrule, and the inner inserted link is inserted in the ferrule; the ferrule is provided with a spacer arranged in the direction of a cross section, the spacer is provided with an axial through channel, the bottom end of the inner inserted link is adaptive to the channel in shape and can seal the channel; the button switch is matched with the inner inserted link and can drive the bottom end of the inner inserted link to leave away the channel, the spring is sheathed on the inner inserted link, and the spring has a trend for leading a first oblique surface and a second oblique surface to be supported tightly at all the time and the bottom end of the inner inserted link to seal the channel. The gasahol pump can be used for effectively controlling the opening size of the ferrule channel and can apply force easily by adopting horizontal pushing mode for operation; and in use process, the opening or closing of the ferrule channel can be realized through the mobile contact of the first oblique surface and the second oblique surface, wear caused by extrusion and deformation can be effectively reduced, and the service life can be prolonged.

The present invention relates to a control device for a lift landing door. The landing door is provided with a positioning hook, one end of the positioning hook rotates around a fixed shaft, a cheese block is fixed, and a retaining shaft is arranged 5-10mm away from the center of the landing door; a manual operation rod is fixed on one end of the positioning hook; the present invention can be widely used in the lift.