Quick Clamping Device for a Portable Machine Tool, in Particular an Angle Grinder, Comprising at Least One Output Shaft That Can Be Rotatably Driven

A portable power tool, comprising:

• a quick clamping device including:
• at least one output shaft configured to be driven in rotation;
• at least one clamping unit including at least one movably mounted clamping element configured to exert a clamping force on an insert tool unit in a clamping position of the at least one movably mounted clamping element, the at least one clamping unit configured to fix the insert tool unit to the at least one output shaft without use of tools;
• at least one operator control unit configured to move the at least one movably mounted clamping element into the clamping position and/or into a release position of the at least one movably mounted clamping element;
• and
• at least one securing unit configured to prevent movement of the at least one movably mounted clamping element from the clamping position into the release position of the at least one movably mounted clamping element at least when the at least one movably mounted clamping element is acted on by a first force which is decoupled from the at least one operator control unit and which acts in a first direction toward the release position of the at least one movably mounted clamping element,
• wherein, in the release position, the insert tool unit is configured to be removed from the at least one clamping unit and/or from the at least one output shaft.