3results about How to "Reduce product weight" patented technology

This invention relates to the field of base station antenna technology and provides a low-loss sheet metal phase shifter, comprising a cavity shell, a sheet metal network, a phase-shifting medium, a supporting medium, and an RF connector. The cavity shell has through-holes on both sides. Inside the cavity shell are two isolated inner cavities, each with a set of sheet metal networks. The phase-shifting medium and the supporting medium are respectively located on both sides of the sheet metal networks. The phase-shifting medium can slide back and forth along the length of the sheet metal network. The supporting medium has at least one hollow unit, which is uniformly distributed along the thickness direction of the supporting medium. The supporting medium is made of a low-dielectric-constant, low-loss insulating material. The RF connector passes through the side wall of the cavity shell and is electrically connected to the sheet metal network. Therefore, the low-loss sheet metal phase shifter of this invention reduces signal transmission loss, is energy-efficient, and has a stable and reliable structure.

The utility model discloses a kind of lower lock type full plastic press pumps, comprising: pump shell, pump chamber is equipped in pump shell, the lower end of pump chamber is equipped with first check valve;Pump pipe, it is slidably arranged in pump chamber, and its lower end is equipped with second check valve;Piston, it is sleeved in the lower part of pump pipe;Rotary seat, it is connected in pump shell by screw thread, and can be lifted in it Adjustment;Guide cover, it is fixedly connected or integrally connected in the upper end outer side periphery of pump pipe;Elastic reset piece, it is arranged between rotary seat and guide cover;Circumferential limiting structure, it is arranged between guide cover and rotary seat;Wherein, in the state that pump pipe is under depression, by rotating pump pipe, rotary seat is driven to move downwards, so that the distance between rotary seat and guide cover increases, so that elastic reset piece keeps relaxed state.The utility model has the advantages of simple structure, convenient operation, and can effectively avoid the advantages that elastic reset mechanism is invalid due to long time pressure.

The utility model discloses a tail plate casting structure in a die-casting machine. The tail plate casting structure comprises a casting part and a plurality of large steel bushings. A plurality of groups of hinge lugs are arranged on the casting part; the plurality of large steel bushings are correspondingly mounted on the plurality of hinge lugs; in any group of the hinge lugs, bosses are arranged on the outer sides of the two hinge lugs located on the two sides, and the bosses are suitable for being used as references when the large steel member is installed. The mounting structure has the beneficial effects that compared with an existing mounting structure for the steel bushings of the die-casting machine, the boss designed by the mounting structure can enable the large steel bushings to have a reference during mounting; meanwhile, due to the arrangement of the rough section on the large steel member, the large steel member can be installed in the hinge lug more firmly, and the position can be adjusted more conveniently, so that under the condition that the strength of the machine hinge is not affected, the manufacturing procedures of the middle plate and the tail plate and the product weight are reduced, the material turnover period is shortened, and the production cost is reduced. And the material and labor cost is reduced.