Electrical junction box

1. An electrical junction box comprising:

a box body in which electrical parts are mounted and that has a water draining hole provided at a bottom wall part of the box body;

a waterproof wall that is provided inside the box body along a periphery of an opening of the water draining hole and includes:

a spherical cover wall part standing from the periphery of the water draining hole to cover the water draining hole with an inner spherical surface; and

a draining opening part formed at a portion of the spherical cover wall part to allow water exist in the box body to drain to the outside of the box body through the water draining hole.

2. The electrical junction box according to claim 1 , wherein the box body includes a peripheral draining protrusion having a shape of a cylinder protruding from an outer surface of the box body along the periphery of the water draining hole and serving as a draining passage.

3. The electrical junction box according to claim 1 , wherein an upper periphery of the draining opening part is located below the top of the inner spherical surface.

4. The electrical junction box according to claim 2 , wherein the opening of the water draining hole is formed in a shape of the letter D, and

the peripheral draining protrusion has an outer surface defined by a flat surface part and a curved surface part so as to correspond to the shape of the water draining hole.

5. The electrical junction box according to claim 1 , wherein the spherical cover wall part is formed as a dome-type wall having a spherical surface.