6results about How to "Ensure normal exposure" patented technology

This utility model relates to the technical field of optical device coating equipment, and particularly to a coating fixture for an open-aperture lens. The open-aperture lens has a coating surface at one end along the axial direction and a positioning part at the other end. The open-aperture lens also has a through hole along the axial direction. The coating fixture includes a fixture body and a fixing member. A positioning groove is provided at the bottom of the fixture body, and a through hole communicating with the positioning groove is provided at the top of the fixture body. The positioning groove is used to position the positioning part. The fixing member passes through the through hole and the through hole in sequence. One end of the fixing member has a limiting part that can be engaged in the through hole, so that the positioning groove positions the positioning part. The coating fixture for the open-aperture lens provided by this utility model can reliably fix and accurately position the lens without obstructing the coating surface.

The application provides a packaging method of an LED lamp bead and the LED lamp bead, and belongs to the technical field of LEDs. Specifically, a plurality of LED chips are provided, the first surface of the LED chip is provided with a welding electrode; the second surface of the plurality of LED chips is arranged on a bottom film, the second surface is arranged opposite to the first surface; the adjacent LED chips are provided with a gap; a glue layer is formed in the gap, and the surface of the glue layer is not higher than the first surface of the LED chip. By controlling the surface of the glue layer to be not higher than the first surface of the LED chip, the complete exposure of the first surface and the welding electrode is maximized, an unobstructed welding interface is provided for welding, and the problem that the glue layer around the welding electrode is expanded by heat and stress to affect the welding effect is fundamentally avoided.

The utility model belongs to test device technical field especially a circuit board testing device, aim at when carrying out salt mist test, circuit board is inconvenient to fix, the problem that horizontal placement is easy to influence back test effect, present and propose following scheme, including sealed cabinet, the cabinet mouth place of sealed cabinet one side is rotatably installed with two sealed cabinet doors, the inner wall of sealed cabinet is fixed with two horizontal poles symmetrically, be provided with the hanging component for vertical circuit board on the horizontal pole, the top of sealed cabinet inner wall is fixed with liquid injection pipe through bolt. The utility model discloses through setting up hanging component to realize circuit board vertical fixation, avoid horizontal placement back and cabinet contact to cause the salt mist deposition uneven, ensure that test surface is exposed to salt mist environment completely, improve the accuracy of corrosion evaluation, and the clamping structure of U type card frame and the setting of holding rod, facilitate the batch installation and taking out of circuit board, shorten test preparation time.

The application provides a kind of circular arc secondary mirror design method and contain circular arc secondary mirror's slot type light-gathering heat collection system, belong to solar light-gathering heat collection technical field. In order to solve the existing secondary reflection slot type light-gathering system's parabolic surface type, composite parabolic surface type and flat plate type curve structure complex, it is easy to cause light-gathering effect to be poor due to processing error;Secondary reflection mirror installation and use will cause the defocusing phenomenon caused by mirror shape error and tracking error to cause the deflection of incidence angle, affect light-gathering effect problem. The application is by installing a kind of circular arc secondary mirror, and the radius, position and width of circular arc secondary mirror are calculated, to ensure that the reflected light through the secondary mirror is maximized to irradiate on the heat collecting tube, to improve the optical efficiency while reducing the processing difficulty.

This invention relates to a device for measuring the flow distribution of mixed particles. It includes a photosensitive element, an illumination mechanism, a measuring tube connected to one side of a pipe, a vibrating tube connected to the other side of a pipe, and a vibration device surrounding the vibrating tube. The measuring tube and the vibrating tube are interconnected. The illumination mechanism and the photosensitive element are spaced apart around the measuring tube. The illumination mechanism emits light that passes through the measuring tube and the mixed particles, and the photosensitive element senses the light. The vibrating end of the vibration device alternately contacts the vibrating tube according to the stratification of the mixed particles, thus affecting the particle distribution. This invention solves the problem that existing solutions cannot measure the particle distribution.

This utility model relates to the field of gear processing technology, specifically to a tooling for loading gear parts for carburizing and quenching. Through the setting of a height adjustment component, the spacing between the support rods can be adjusted according to the size of the gear. The two ends of the gear hanger are inserted into the hanger limiting grooves of the front and rear support rods. The hanger limiting grooves are evenly distributed to ensure the gear hanger is horizontally stable. Limiting blocks are installed at both ends of the gear hanger via threads. The diameter of the limiting blocks is larger than the hanger limiting groove to prevent the gear hanger from falling out of the groove. Gear parts are sequentially fitted onto the gear hanger, with the gear inner hole and gear hanger having a clearance fit. The teeth of each gear are inserted into the corresponding gear limiting groove. The gear limiting grooves are evenly spaced to avoid contact between gears, ensuring the tooth surface is fully exposed. The carburizing medium can fully coat the tooth surface. Furthermore, the gear hanger is used for batch loading and unloading. After quenching, the gear hanger can be tilted to quickly remove the gear.