Housing having housing parts bondable together and method of manufacturing the same

A method for manufacturing a housing, comprising:

• providing a first housing part that includes:
• a first base wall, and
• a first surrounding wall connected around the first base wall, and having a first joint portion, a first outer surface and a first inner surface, the first joint portion being opposite to the base wall, the first outer and inner surfaces extending from the first joint portion toward the base wall, the first joint portion being stepped and having a first projecting portion adjoining the first outer surface, and a first shoulder portion proximal to the first inner surface and indented from the first projecting portion, the first shoulder portion having a plurality of parallel ribs protruding from a longitudinally extended section thereof, the ribs being spaced-apart longitudinally along the longitudinally extended section of the first shoulder portion to each extend in a transverse direction across the longitudinally extended section, each of the rib having a tip that does not extend beyond a top end of the first projecting portion;
• providing a second housing part that includes a second base wall, a second surrounding wall connected around the second base wall, the second surrounding wall having a second joint portion, a second outer surface and a second inner surface, the second joint portion being opposite to the second base wall, the second outer and inner surfaces extending from the second joint portion toward the second base wall, the second joint portion being stepped and having a second projecting portion adjoining the second inner surface, and a second shoulder portion indented from the second projecting portion and adjoining the second outer surface;
• and
• bring together joining the first and second housing parts, which includes interlocking the first joint portion with the second joint portion such that the second shoulder portion is placed in contact with the first projecting portion and the second projecting portion is placed in contact with the ribs.