US Patent 7497699 Junction box assembly with T-shaped aligning protrusion

A junction box assembly includes first and second structures, such as upper and lower cases. T-shaped aligning protrusions extend beyond an edge of a sidewall of the second structure and mate with a receiving member contained in the first structure. When the first structure is being aligned with the second structure, chamfers on the T-shaped aligning protrusion may be provided to help start the alignment process before the first and second structures are joined together. This allows for faster and easier assembly of the junction box and helps to reduce the mating forces between the first and second structures.