54results about How to "Prevent warping and deformation" patented technology

The embodiment of the invention provides a loudspeaker diaphragm and a loudspeaker. The loudspeaker diaphragm comprises a central portion, a folding ring portion and a fixing portion, which are sequentially connected from the inside to the outside; and a plurality of patterns across the folding ring portion and the fixing portion are arranged on the diaphragm; and the first end of each pattern extends toward the peripheral edge of the fixing portion, and the second end of the pattern extends out from the peripheral edge of the folding ring portion to extend onto the folding ring portion. The technical scheme provided by the invention can not only effectively divide the stress of a stress concentration region of the fixing portion but also can increase the strength of the fixing portion, thereby effectively avoiding the problem of warpage and deformation after the diaphragm is formed, and improving the diaphragm yield.

The invention discloses a low-noise air pump which comprises an upper cover, a cylinder, a piston, a base, a unidirectional inlet and outlet air distributing device, a motor, a linkage mechanism and a partition plate. The upper cover is provided with an exhaust port and an air inlet, and the piston is integrally provided with at least two air bags; the partition plate is provided with a first air outlet hole and first air inlet holes; the partition plate is fixed to a position between the upper cover and the unidirectional inlet and outlet air distributing device, the partition plate and the upper cover are hermetically matched with each other to form a sealed cavity, the air inlet of the upper cover and the first air inlet holes of the partition plate are respectively communicated with the sealed cavity, the first air outlet hole of the partition plate is communicated with the exhaust port of the upper cover, and the first air outlet hole and the first air inlet holes are respectively correspondingly matched with the unidirectional inlet and outlet air distributing device to realize a unidirectional outlet air distributing effect and a unidirectional inlet air distributing effect. The low-noise air pump has the advantages that owing to the partition plate, an airflow passage is prolonged, inlet air can be buffered, impact force is reduced, accordingly, running noise of the air pump is greatly reduced, and tilting deformation of an air inlet check valve of the unidirectional inlet and outlet air distributing device due to long-term direct stress can be prevented.

The invention provides a semiconductor charging device capable of effectively preventing the buckling deformation of a plastic-packaged lead frame in a processing process. The semiconductor charging device comprises an open type charging track and a pushing device, wherein the cavity of the charging track is matched with the plastic-packaged lead frame; one end of the charging track is provided with a limited block; the pushing device comprises a push rod, a push rod installation block, a sensor, a roller, a follower and a conveying fixed plate; a push rod connecting rod is elastically connected with the push rod installation block through an elastic screw plug, controls elastic connecting force through the elastic screw plug and keeps effective connection under the condition that the plastic-packaged lead frame is not deformed and damaged; the slant hook-shaped design of the push rod is adapted to the buckling deformation of the plastic-packaged lead frame, wherein the deformation amount of the buckling deformation is less than h. The semiconductor charging device provided by the invention enhances the stability of equipment and the perfectness ratio of a product and is convenient to operate and maintain.

A laser welding jig of a triangular titanium alloy covering and skeleton weld assembly relates to a laser welding jig. The invention aims to solve the existing problem that the front tip of the triangular titanium alloy covering and skeleton weld assembly upwarps and deforms in laser welding. In the laser welding jig, a first positioning plate, a second positioning plate and a guide base are fixedly connected with a bottom plate; the first positioning plate and the second positioning plate are perpendicular to each other; a first compression quick change chuck is fixed on the guide base, the first compression quick change chuck is connected with a first pressure plate; two guide sleeves are fixedly connected with the guide base, each guide post is fixedly connected with the first pressureplate; a reinforcing frame is fixed on the first positioning plate, a second pressure plate is arranged in the reinforcing frame; the first pressure plate, the second pressure plate, the first positioning plate and the second positioning plate constitute a triangle with the same shape with the triangular titanium alloy covering and skeleton weld assembly; a second compression quick change chuck is fixed on the outside surface of the first positioning plate; and a third compression quick change chuck is fixed on the outside surface of the second positioning plate. The laser welding jig in the invention is used for the laser welding of the triangular titanium alloy covering and skeleton weld assembly.

The invention discloses an alloy YG head assembly machine with zipper pulls automatically fed. The alloy YG head assembly machine comprises a machine frame and a round rotary plate, the round rotary plate is provided with a plurality of puller mold cores, and a puller conveying device, a zipper pull conveying device and a riveting device are arranged on the machine frame and around the circumferential surface of the round rotary plate; the riveting device comprises a first riveting mechanism, a second riveting mechanism and a third riveting mechanism, each riveting mechanism comprises a guide block, a fixed plate, a riveting cutter and a pressing rod, the fixed plates are arranged above the guide blocks, the riveting cutters are fixed to the lower ends of the fixed plates, the riveting cutter and the pressing rods penetrate through the guide blocks and are located above the puller mold cores, and reset springs are arranged between the pressing rods and the fixed plates; and the three guide blocks are connected to one cross beam, and two lifting rods are arranged at the two ends of the cross beam respectively and are driven by a power driving mechanism to be synchronously lifted. According to the riveting device, riveting convex points of pullers are riveted in three steps, and therefore the riveting force can be conveniently controlled, riveting deformation of the pullers is prevented, and the riveting quality of the pullers is improved.

The invention discloses a mould for molding a super-thin soft ferrite magnetic core, comprising a case mould which is provided with a nib. The mould is characterized in that the edge of the nib is provided with a material spraying slot; by adopting the invention, powder at a higher density part in molding process can be sprayed out by the material spraying slot, thereby ensuring uniform density of each part when molding above products, avoiding or maximally reducing poor buckling deformation generated by density difference, thus reaching the purpose of massively producing super-thin soft ferrite magnetic core with the height less than 0.5mm. The mould has simple design, does not change original operation mode, has no need of specifically training operating personnel and does not increase manufacturing cost.

A screen is formed of screen boards which are connected collapsibly. The screen board is a composite board and includes a surface plate, a bottom plate, a perforated plate and multiple inner lining parts. The perforated plate is filled between the surface plate and the bottom plate. The inner lining parts are sandwiched between the surface plate and the bottom plate acting as connecting parts to connect the screen boards with outside components and parts, or acting as reinforce parts at the same time.