4results about How to "Location does not affect" patented technology

The utility model relates to the field of PCBs, in particular to a PCB short circuit defect testing device. Comprising a bottom plate, supporting rods, bolts, a supporting plate, positioning columns, a cover plate, a mounting plate and the like. The bottom plate is installed on the lower side of a testing area inside the PCB electrical performance testing machine, a plurality of supporting rods are fixed to the bottom plate through bolts, a supporting plate is fixed to the upper sides of the supporting rods on the bottom plate through bolts, a PCB is placed on the supporting plate, testing points are arranged on the PCB, positioning columns are arranged at the four corners of the upper side of the supporting plate, and probes and a plurality of ejector pins are arranged on the upper side of the supporting plate. The probes are connected with a PCB electrical performance testing machine through copper wires, and the probes are in contact with testing points on the PCB. According to the utility model, the resistance and inductance values of the PCB are measured in a four-wire resistance test and inductance test mode, the control threshold values of the resistance and inductance values of good products are screened as standard threshold values, and short circuit defects of different lines in the same network can be accurately intercepted.

The invention relates to the technical field of medical equipment, discloses cardiac compression first-aid equipment for cardiovascular medicine, and aims to solve the problem that rescue efficiency is affected due to the fact that a patient cannot receive cardiopulmonary resuscitation when the equipment is adjusted. Through the arrangement of the pressing mechanism, the main body is located on one side of a pressing person, so that during manual cardio-pulmonary resuscitation, the pressing head is aligned with the position which is being pressed by the pressing person, the action of the pressing person is not influenced, the pressing position of the pressing head is more accurate, the man-machine switching time is shortened, and the working efficiency is improved. Afterwards, a pressing person holds a pressing head by hand to press the chest of the patient, another person adjusts the pressing depth and the stretching frequency of the electric air cylinder, after adjustment is completed, the pressing person loosens the pressing head, the electric air cylinder is rapidly connected with the pressing head, and pressing operation is started. The man-machine switching time is further shortened, and the influence on the rescue efficiency is reduced.

The application discloses a kind of based on chemical fibre spinning injection head silk with rejecting device, it is related to chemical fibre spinning technical field.The application includes two rejecting frames, front support and rear support, rejecting frame includes inner frame body and rejecting plate, inner frame body includes riser, and the upper portion of one side of riser is obliquely fixed with guide plate, and bottom plate is fixed between guide plate and riser, the other side surface of riser is equipped with recess, and end plate is fixed in both ends of inner frame body, and outer clamping plate is fixed on the outer surface of end plate by connecting plate, rejecting plate is slidably arranged in recess, and separating blade is fixed at the top edge of rejecting plate.The injection head silk will be separated from the filament bundle quickly by the sharpness of the upper surface of separating blade through the design of novel rejecting frame to form relatively narrow threading gap, and then slide away along guide plate to be rejected from the filament bundle, to achieve the purpose of rejecting injection head silk, greatly improve the rejection effect of injection head silk, to ensure the production efficiency of subsequent process, ensure product quality.

The utility model relates to tunnel tunneling technical field, specifically disclose a kind of tunnel peripheral hole drilling device, including first base, first base two ends are respectively installed with a first support frame, and drill rig is installed in base;Still include drill rod, drill rod is supported by two first support frames, so that drill rod is different shaft with drill rig;The output end of drill rig is connected with drill rod by belt.