Surgical handpiece with a push rod that both transfers rotational movement to an output drive shaft and that actuates a cutting accessory locking assembly

摘要

A powered surgical handpiece that actuates a cutting accessory releasably attached to it. A drive shaft is connected to a motor internal to the handpiece that rotates upon actuation of the motor. The drive shaft has a bore for receiving an elongated shaft of the cutting accessory. A collet attached to the drive shaft has feet that releasably engage the cutting accessory shaft. The cutting accessory shaft has longitudinally spaced apart retention features with surfaces against which the collet feet can bear. The drive shaft bore is formed so that each retention feature can be aligned with the collet. This facilitates the selective coupling of the cutting accessory to the handpiece so that the extent to which the distal end of the cutting accessory extends forward of the handpiece can be selectively set.