Handheld electromechanical surgical device including load sensor having spherical ball pivots

An adapter assembly for mechanically and electrically interconnecting a surgical reload to a handle assembly of a handheld electromechanical surgical device, the adapter assembly comprising:

• an adapter housing configured and adapted for connection with the surgical device and to be in rotative communication with a rotatable drive shaft of the surgical device;
• an outer tube having a proximal end supported by the adapter housing and a distal end configured and adapted for connection with the surgical reload, the outer tube defining a longitudinal axis;
• a force sensor arrangement disposed within the outer tube, the force sensor arrangement including:
• a support block supported within the outer tube, the support block defining a support block surface and a support block passage extending along the longitudinal axis of the outer tube;
• a load sensor disposed axially adjacent the support block, the load sensor defining a sensor surface and a load sensor passage extending along the longitudinal axis of the outer tube;
• and
• a spherical disc interposed between the support block and the load sensor, and in contact with the support block surface and the sensor surface, wherein the spherical disc defines a first side in abutting contact with the sensor surface, and a second side in abutting contact with the support block surface, wherein the second side of the spherical disc has a spherical profile and the support block surface has a complimentary spherical profile whereby the spherical disc is free to pivot relative to the longitudinal axis to maintain the support block and the load sensor in force transmitting alignment with one another, and wherein the spherical disc defines a spherical disc passage extending along the longitudinal axis of the outer tube;
• and
• a trocar assembly extending through the support block passage of the support block, through the load sensor passage of the load sensor, and through the spherical disc passage of the spherical disc, the trocar assembly including:
• a trocar housing connected to the support block;
• a trocar screw rotatably supported in the trocar housing;
• and
• a trocar member threadably supported on a distal end of the trocar drive screw, wherein the trocar drive screw is rotatively connected to the rotatable drive shaft of the surgical device.