391results about How to "Play a limiting role" patented technology

The utility model relates to the technical field of linear guide rails, in particular to a pre-tightening mechanism of a high-rigidity linear guide rail, which comprises two symmetrical linear guide rail main bodies, a central fixing block is fixedly arranged in the middle of the two linear guide rail main bodies, and a trapezoidal clamping groove is arranged on the upper surface of the central fixing block. A front rectangular limiting rod and a rear rectangular limiting rod which are symmetrical to each other are arranged between the two linear guide rail bodies, a center clamping block is fixedly installed between the two rectangular limiting rods and matched with the trapezoidal clamping grooves in a clamped mode, and end limiting plates are fixedly installed at the ends of the rectangular limiting rods and abut against the end faces of the linear guide rail bodies. Inner supporting ribs abutting against the inner side face of the linear guide rail body are fixedly installed on the front side face and the rear side face of the rectangular limiting rod, and bolt plates are fixedly installed on the side faces of the end limiting plates and detachably installed on an external frame body. The anti-loosening nut is firm and stable in structure and has a good anti-loosening effect.

The utility model discloses an injection mold with a self-locking function, relates to the field of injection molds, and aims to solve the problems that an upper mold and a lower mold are closed during injection molding and the closed molds are lack of effective limiting, so that a gap is formed between the two molds, the molds are loosened during workpiece molding, and the product quality is influenced. According to the technical scheme, the die comprises a lower die base and an upper die base, a positioning guide column is arranged above the lower die base, a connecting hole is formed in the lower end of the upper die base and corresponds to the positioning guide column, an open groove is formed in the side wall of the positioning guide column, and the upper die base and the lower die base are connected through the open groove. Four mounting cavities are formed in the upper die base, sliding blocks are arranged in the mounting cavities, limiting blocks are arranged on one sides of the sliding blocks, the limiting blocks and the sliding blocks are slidably connected with the upper die base, the limiting blocks correspond to the opening grooves, and second compression springs are arranged in the mounting cavities.

This utility model relates to the field of mining chute technology, specifically a mining chute device, including a placement plate, a support frame, a sliding plate, a mounting block, and a rotating head. The support frame is fixedly connected to the lower end of the placement plate, the mounting block is fixedly connected to the upper end of the placement plate, and the rotating head is rotatably connected inside the mounting block. The sliding plate is fixedly connected to the upper end of the rotating head. An adjustment device is provided on the surface of the placement plate, the adjustment device including a connecting plate and a limiting plate, the connecting plate being fixedly connected to the upper end of the placement plate. This utility model, by setting an adjustment device, effectively adjusts the angle of the sliding plate, thus achieving the function of adjusting the sliding plate angle. When the equipment slides different minerals, it needs to adjust the sliding plate to different angles. However, existing equipment is heavy and difficult to quickly adjust the tilt angle of the sliding plate, resulting in low equipment efficiency. This utility model greatly improves the efficiency and accuracy of angle adjustment.

The utility model relates to the field of testis measurement, in particular to a boy testis measurement caliper which is fixed to the legs of a patient, reduces shaking and facilitates hand measurement and testis position adjustment of workers. Comprising a transverse fixing plate, and a plurality of backward suckers are fixedly arranged on the left side and the right side of the rear side face of the fixing plate; the fixing plate is in a vertical cuboid shape, a rectangular groove is embedded downwards in the top face of the fixing plate, and a pair of angle-adjustable measuring pieces is arranged in the rectangular groove in a left-right sliding and limiting mode. A rectangular through hole communicated with the rectangular groove is embedded backwards in the front side face of the rectangular groove, and a limiting bolt for limiting the measuring piece is screwed backwards in the rectangular through hole. And the top surface of the fixing plate on the front side of the upper port of the rectangular groove is provided with scales in the left-right direction. The device is easy to operate, convenient to use and suitable for various patients.

The utility model belongs to the field of woven bags, and particularly relates to a puncture-proof woven bag which comprises a bag body and a protective bag, the bag body is provided with a placing cavity, four corners of the bag body are respectively provided with a circular groove, the circular grooves are communicated with the placing cavity, vertical rods are arranged on the circular grooves, and the protective bag is arranged on the bag body. The four corners of the outer surface of the protection bag are each fixedly provided with a circular ring, the number of the circular rings is eight, every four circular rings form a group, and the two groups of circular rings are located at the top and the bottom of the outer wall of the protection bag correspondingly; through the structural design of the circular grooves, the vertical rods, the protective bags and the circular rings, during use, the protective bags assembled in the containing cavities can protect the inner walls of the bag bodies, puncture of sharp goods can be effectively resisted, the puncture-proof performance of the bag bodies is greatly improved, meanwhile, the protective bags can be separated from the bag bodies, and the service life of the bag bodies is prolonged. The bag body and the protective bag are easy and convenient to disassemble and clean, and meanwhile, when a certain part is damaged, the undamaged part can be reused.