69results about How to "Reduce deflection angle" patented technology

A self-tapping insert is installed in a pre-existing bore hole in a workpiece by rotating the insert, causing cutting threads on the exterior of the self-tapping insert to cut new threads. Engagement threads on the exterior of the self-tapping insert engage the new threads to retain the self-tapping insert within the workpiece. The self-tapping insert may comprise internal threads which are used to replaced damaged threads in the workpiece. The exterior threads of the self-tapping insert may be configured as left-handed threads, while the internal threads are right-handed threads. The top of the self-tapping insert may comprise a plurality of castellations, and a drive head having matching castellations may be employed to install the self-tapping insert, eliminating the need for installing the insert with a drive bolt. The exterior of the self-tapping insert may further comprise a leading edge for cutting the new threads, where the leading edge has greater radial extension than the trailing edge. This feature provides greater chip relief, thereby reducing the torque required to install the self-tapping insert.

The invention relates to a trolley for entertainment. The trolley comprises a seat frame, a headstock and a connecting piece, wherein the back end of the connecting piece is connected with the seat frame; the front end of the connecting piece is hinged with the headstock; left and right sides of the headstock are respectively provided with pedal parts; the lower end of the headstock is provided with M front pulley assemblies; the lower end of the seat frame is provided with N rear pulley assemblies, wherein the sum of M and N is more than or equal to 3; each front pulley assembly comprises a front pulley and a front pulley bracket; the front pulley bracket is connected with the front pulley; the front pulley bracket is connected with the headstock; each rear pulley assembly comprises a rear pulley and a rear pulley bracket; the rear pulley bracket is fixedly connected with the rear pulley; the rear pulley bracket is connected with the seat frame; the front pulley bracket or / and the rear pulley bracket is / are obliquely arranged; and when N is more than 1, the lower end of the seat frame is provided with a tail swinging device. The trolley is driven by a sitting posture so that the trolley is very comfortable to use; and meanwhile, the tail swinging device is arranged between the seat frame and the rear pulley assemblies, so that the deflection angle of the rear pulleys is reduced, and the trolley is good for steering and keeping the trolley balance.

The application provides an augmented reality display device comprising a projection source module and an optical path module, the projection source module comprising a projection source (12) and a beam shaping element (14) which are integrated into a unitary piece, and the optical path module comprising a beamsplitter (20) and a reflector (60), wherein virtual image light (VL) emitted from the projection source (12) and carrying virtual image information is emitted out of the projection source module after being shaped by the beam shaping element (14), projected onto the beamsplitter (20) first, then reflected onto the reflector (60) by the beamsplitter (20), then reflected by the reflector (60), and enters a human eye (E) eventually, and scene light (AL) carrying real scene information enters the reflector (60) from an outside of the reflector (60), and is transmitted through the reflector (60) and the beamsplitter (20) into the human eye (E). The application also provides a wearable augmented reality system comprising the augmented reality display device and the projection source module for the augmented reality display device.