| 摘要 |
A unitary die-cast for housing electronic circuits includes one or more compartments or cavities adapted to receive circuit boards therein. A compartment with a cavity includes a post, centrally located in the bottom and extending upwardly in the middle of the cavity. A fastening device, such as a screw, is used to forcibly affix a rigid but flexible cover onto the housing at the center post. The cast and the cover are made of electrically conductive but acoustically dampening material. When the cover is forcibly affixed to cover the cavity, the cover and the chassis provide an acoustically and microphonically dampened housing for the circuit placed therein. |
