2results about How to "Good protection" patented technology

This utility model relates to the field of sports training equipment technology and discloses a shot put training and testing device, including a protective pad, an auxiliary mechanism, and a recovery component. The surface of the protective pad is marked with landing area scales, and the upper end of one side of the protective pad along its length is inclined. The auxiliary mechanism includes a protective component and an adjustment component. The protective component is used to protect the middle school student's waist, the adjustment component is used to adjust the height of the protective component, and the recovery component is used to retrieve the shot put after it has been thrown. This shot put training and testing device, by setting up a protective component, can conform to the contour of the middle school student's waist during back-raising posture training, providing stable and appropriate auxiliary support, effectively dispersing the enormous pressure on the waist during the back-raising process, avoiding muscle strain due to overstretching or uneven stress, and ensuring the student's physical safety during training.

This invention provides a leveling device and method for Vickers hardness testing of high-hardness ceramic materials. The device aims to solve the problems of irregular indentations, inaccurate data, and indenter damage caused by insufficient machining precision leading to non-parallelism of the upper and lower surfaces in Vickers hardness testing. The device includes a base plate for fixing to the original sample stage of the hardness tester, a floating plate connected above the base plate via a ball joint assembly, and three leveling knobs arranged in a triangle, screwed into the floating plate with their lower ends resting against positioning holes in the base plate. By adjusting the leveling knobs, the floating plate can be driven to make omnidirectional micro-motion around the center of the ball joint, thereby directly adjusting the pitch and deflection angles of the sample to be tested, which is fixed to the upper surface of the floating plate. This invention has a compact and low-profile structure, does not interfere with the original function of the hardness tester, and ensures strict parallelism between the test surface and the indenter by "directly leveling the upper surface of the sample," significantly improving testing accuracy and reliability.