The actuator pin includes a head.

The apertures are configured to receive the drive shaft there through and are larger than the drive shaft to accommodate lateral displacement of the drive shaft.

A vertical actuation rod (41) passes through the lid.

The actuator bar extends substantially parallel to the slider rails.

The operating rod (7) can also be vertically moved.

An actuating rod is disposed to extend between the handle assembly and the shaft.

The drive shaft is powered by a motor assembly that is offset from the internal flow passage and the output drive shaft.

The control device is further connected to a brake actuation means (11) through a control rod (41) and actuation rod (23).

An actuation shaft is secured near to the proximal end of the retracting member and the distal end of the actuation shaft is secured to the therapeutic working element.

A needle assembly at the distal end of the actuating rod is movable with the actuating rod between an extended state and a retracted state.

Said hood member (6) is linked with an actuation rod (8).

An annular spring within a housing surrounds an actuator rod.

An actuating rod (308) extends along the axis of rotation.

An actuation rod (23) is mounted to the injection rod and has an engaging part at an other end side.

Optionally a tooth system is provided between the base (1) and the operating rod (2) which hampers undesirable sliding of the operating rod (2) within the base (1).