Patent ID: 9393659
Filing Date: 2016-07-19
CPC Classification: B23Q,B27G,Y10T

Claim Text:
1. A cutting-off saw with a safety protection device, comprising a base for placing a workpiece to be cut, a support arm being arranged on the base, a cutting blade being coupled to the support arm by a driving head, a fan-shaped fixed guard and a movable guard being configured to enclose the cutting blade and can be combined into a single disc, an extension arm being coupled to a top portion of the support arm, the extension arm being coupled to a first end of a guard connecting rod by a pivot screw, a second end of the guard connecting rod being coupled to the movable guard, wherein the first end of the guard connecting rod is formed into an arc-shaped elbow and is coupled to a stop button by the pivot screw, wherein an arc-shaped bayonet having a radian matching with a radian of the arc-shaped elbow of the guard connecting rod is arranged on a lower portion of the stop button, and an arc-shaped channel is formed in the arc-shaped elbow in which the pivot screw can slide such that when the arc-shaped elbow of the guard connecting rod is locked by the arc-shaped bayonet of the stop button, the pivot screw is not permitted to slide along the arc-shaped channel in the guard connecting rod, and when the stop button is lifted upwards, the pivot screw is allowed to slide along the arc-shaped channel in the guard connecting rod.