Patent ID: 7181040
Filing Date: 2007-02-20
Classification: H04R

Abstract:
1. A case for containing an electrical instrument, comprising: a frame having peripheral wall portions; a cover member having peripheral wall portions and configured to cover the frame and form a space for containing the electrical instrument between the frame and the cover member, the peripheral wall portions of the cover member being configured to engage with the peripheral wall portions of the frame; at least one hole passing through one of the peripheral wall portions of the frame and the cover member; and at least one protrusion each having a smoothly inclined surface, the at least one protrusion being provided on the other of the peripheral wall portions of the frame and the cover member, and wherein when the cover member is fitted on the frame, an opening edge of the hole hurdles the smoothly inclined surface so that the protrusion is inserted into the hole to fix the cover member to the frame.