Abstract: A ball valve structure includes a valve body having a valve chamber therein. A valve ball is accommodated in the valve chamber. The valve ball defines a flow hole therein. Two gaskets are in close contact with two opposite side surfaces of the valve ball, so that the valve ball can rotate around a fixed point in the valve chamber. One side of one of the two gaskets abuts against a washer and a compression spring, so that the gasket is elastically pressed against a surface of the valve ball. A valve stem is connected to the valve ball through the valve body for driving the valve ball to rotate, enabling the flow hole to be opened.

Abstract: An improved structure of a cutting tool includes a body, a moving base, and a roller base. The body has a track groove whose one side is extended upward with a stopping wall. The moving base is disposed to slide in the track groove and mounted with a cutting wheel. The moving base is connected with a transmission element so as to move along the track groove. The roller base is disposed between the moving base and the stopping wall. More than one elastic element is disposed between the roller base and the stopping wall. The elastic elements generate a deviation when the roller base is under a force. The roller base has at least two rollers corresponding to the cutting wheel.

Abstract: A cutting tool includes a body, a moving base, and a roller base. The body has a rail groove, whose one side is extended upward with a stopping wall. The moving base is disposed in the rail groove of the body and has a cutting wheel. The moving base is connected with a transmission element and driven by the transmission element to move along the rail groove. The roller base is interposed between the moving base and the stopping wall. There are a plurality of elastic elements between the roller base and the stopping wall. The roller base is disposed with at least two rollers opposite to the cutting wheel.

Abstract: An improved structure of a cutting tool includes a body, a moving base, and a roller base. The body has a track groove whose one side is extended upward with a stopping wall. The moving base is disposed to slide in the track groove and mounted with a cutting wheel. The moving base is connected with a transmission element so as to move along the track groove. The roller base is disposed between the moving base and the stopping wall. More than one elastic element is disposed between the roller base and the stopping wall. The elastic elements generate a deviation when the roller base is under a force. The roller base has at least two rollers corresponding to the cutting wheel.