Abstract: The present invention relates to a quick-change saw blade clamping device which includes an output shaft, a cylindrical rotatable sleeve and a torsion spring. The output shaft is coupled to a blade carrier which is disposed within the cylindrical rotatable sleeve. A rotatable member is disposed within the cylindrical rotatable sleeve. A locking member pivotally connected to the blade carrier lies in a guide groove which is formed on the blade carrier. A spiral surface is formed on the front end of the rotatable member. When the cylindrical rotatable sleeve is manually rotated, the spiral surface urges the locking member to press the blade into a locking position. The present invention provides an easily-operated clamping device of simple structure and small size.

Abstract: The present invention relates to a reciprocating mechanism for a power tool comprising a reciprocating rod driven by a drive mechanism and a fixed elongate carrier member arranged to be slidably retained at least partially in or on the reciprocating rod. The carrier member permits intimate coupling of the drive mechanism and the reciprocating rod (and therefore lateral compactness) without comprising the effectiveness of the reciprocative action.

Abstract: The present invention relates to a quick-change saw blade clamping device which includes an output shaft, a cylindrical rotatable sleeve and a torsion spring. The output shaft is coupled to a blade carrier which is disposed within the cylindrical rotatable sleeve. A rotatable member is disposed within the cylindrical rotatable sleeve. A locking member pivotally connected to the blade carrier lies in a guide groove which is formed on the blade carrier. A spiral surface is formed on the front end of the rotatable member. When the cylindrical rotatable sleeve is manually rotated, the spiral surface urges the locking member to press the blade into a locking position. The present invention provides an easily-operated clamping device of simple structure and small size.