Terminal device of electrical apparatus

1. A terminal device of an electrical apparatus comprising:

a frame including at least two side walls with grooves, a bottom wall disposed between the at least two side walls and having a first recess, and a rear wall standing from the bottom wall to form a box-shaped space, at least one attachment piece fitted into the box-shaped space, and having a cylinder-shaped recess and a lower surface with a projection for engaging the first recess, and at least one terminal strip with a terminal screw to be inserted into the box-shaped space along the grooves so that the terminal screw is fitted into the cylinder-shaped recess for attaching the terminal strip to the attachment piece.

2. A terminal device according to claim 1 , wherein said attachment piece further includes a resilient claw on a back surface thereof, and said rear wall includes a second recess for engaging the resilient claw.

3. A terminal device according to claim 1 , further comprising another attachment piece connected to the attachment piece with a coupling unit disposed across one of the two side walls between the another attachment piece and the attachment piece.

4. A terminal device according to claim 1 , further comprising a terminal fitting having another terminal strip, said terminal fitting being able to be inserted into the box-shaped space when the at least one attachment piece is not attached to the frame.