Abstract: An actuation mechanism for a surgical handpiece includes a trigger assembly extending along a translational path and a rotational linkage in connection with the trigger assembly that converts translational motion along the translational path to a rotational motion about the actuation path. A magnet is in connection with the rotational linkage. The magnet has opposing poles that rotate in response to the rotational motion.

Abstract: A control module for a surgical handpiece assembly includes a body encapsulated in a sealed assembly extending from a first end portion to a second end portion and having a first side opposing a second side. A collar is formed by the first end portion and forms an opening extending from the first side to the second side and configured to pass an output shaft of an electric motor. A control circuit and a motor switching circuit are enclosed within the body. The body includes a plurality of positioning features disposed about the opening on the first side and the second side of the collar, wherein the positioning features engage complementary retention features on a stator assembly and a drive coupling assembly of the surgical handpiece aligning the collar with the output shaft.