Abstract: A cutting method includes a pipe of a cutting tool driving a pressing foot assembly of the cutting tool to press against an object in a direction; the pressing foot assembly sliding along the direction by cooperation of a sliding block of the pressing foot assembly and a sliding slot on the pipe to compress a spring of the cutting tool; the compressed spring generating a resilient force for driving the pressing foot assembly to collapse a plurality of wave-shaped core layers of the object; and after the plurality of wave-shaped core layers of the object is collapsed by the pressing foot assembly, a blade assembly of the cutting tool protruding from the pressing foot assembly via an opening on the pressing foot assembly and being driven to cut the collapsed object along another direction perpendicular to the direction without oscillation as the cutting tool moves along the another direction.

Abstract: A cutting method includes a pipe of a cutting tool driving a pressing foot assembly of the cutting tool to press against an object in a direction; the pressing foot assembly sliding along the direction by cooperation of a sliding block of the pressing foot assembly and a sliding slot on the pipe to compress a spring of the cutting tool; the compressed spring generating a resilient force for driving the pressing foot assembly to collapse a plurality of wave-shaped core layers of the object; and after the plurality of wave-shaped core layers of the object is collapsed by the pressing foot assembly, a blade assembly of the cutting tool protruding from the pressing foot assembly via an opening on the pressing foot assembly and being driven to cut the collapsed object along another direction perpendicular to the direction without oscillation as the cutting tool moves along the another direction.

Abstract: A cutting tool includes a pipe, a pressing foot assembly, a spring, and a blade assembly. The pressing foot assembly is slidably sheathed on an end of the pipe. The spring is sheathed on the pipe. An end of the spring abuts against the pipe, and the other end of the spring abuts against the pressing foot assembly. The blade assembly passes through the pipe and the pressing foot assembly in a slidable manner. When the cutting tool moves along a first direction, the pressing foot assembly keeps pressing against an object in a second direction substantially perpendicular to the first direction, such that the blade assembly protrudes from the pressing foot assembly and cuts the object along the first direction.

Abstract: A cutting tool includes a pipe, a pressing foot assembly, a spring, and a blade assembly. The pressing foot assembly is slidably sheathed on an end of the pipe. The spring is sheathed on the pipe. An end of the spring abuts against the pipe, and the other end of the spring abuts against the pressing foot assembly. The blade assembly passes through the pipe and the pressing foot assembly in a slidable manner. When the cutting tool moves along a first direction, the pressing foot assembly keeps pressing against an object in a second direction substantially perpendicular to the first direction, such that the blade assembly protrudes from the pressing foot assembly and cuts the object along the first direction.

Abstract: A fault-tolerant battery set and a start-up battery module are described. The fault-tolerant battery set includes a main battery module, a battery monitoring unit, a control switch unit, and a back-up battery module. The main battery module includes a battery unit and a battery monitoring circuit. When the battery unit fails, the control switch unit conducts a power supply connection path according to a failure signal sent from the battery monitoring circuit, so as to replace the failed main battery module with a back-up power provided by the back-up battery module through the power supply connection path.

Abstract: A power hand tool is disclosed to include a Li-battery set, an electric power storage device electrically connected in parallel to the Li-battery set, a motor, a power switch electrically connected between the motor and the electric power storage device and operable to switch on/off electric connection between the motor and the electric power storage device, a speed reducing gear set coupled to the output shaft of the motor, and an impact mechanism movable in a predetermined direction by the speed reducing gear set. When the power switch is switched on to electrically connect the electric power storage device to the motor, the motor is started to rotate the output shaft and the speed reducing gear set, causing the speed reducing gear set to move the impact mechanism and to further provide an impact force.

Abstract: A cutting tool includes a pipe, a pressing foot assembly, a spring, and a blade assembly. The pressing foot assembly is slidably sheathed on an end of the pipe. The spring is sheathed on the pipe. An end of the spring abuts against the pipe, and the other end of the spring abuts against the pressing foot assembly. The blade assembly passes through the pipe and the pressing foot assembly in a slidable manner. When the cutting tool moves along a first direction, the pressing foot assembly keeps pressing against an object in a second direction substantially perpendicular to the first direction, such that the blade assembly protrudes from the pressing foot assembly and cuts the object along the first direction.