Circular saw, in particular hand-held circular saw

A circular saw for cutting a workpiece, comprising:

• a housing;
• a tool holder supported by the housing and operably connected to an exchangeable saw blade;
• a drive unit at least partially arranged in the housing and operably connected to the tool holder, the drive unit configured to rotationally drive the tool holder and the exchangeable saw blade about an associated axis of rotation;
• and
• a protective wedge assigned to the exchangeable saw blade and rotatably mounted on the housing such that the protective wedge is rotatable about the associated axis of rotation, the protective wedge configured to enclose at least a portion of the exchangeable saw blade, and the protective wedge guided in a sawing groove formed by the saw blade in the workpiece during a sawing operation of the workpiece, in such a way that contact with the portion of the exchangeable saw blade is at least substantially prevented,
• wherein the protective wedge is assigned a touch sensor configured to detect a contact between the protective wedge and an object, and wherein the touch sensor is configured to trigger a mechanism for blocking the protective wedge in the event of a detection.