Electrical connector assembly with a drainage structure

1. An electrical connector assembly, comprising:

a first connector including a first housing having a mating opening;

a second connector including a second housing mated with the first connector through the mating opening; and

a drainage structure provided on and corresponding to a boundary portion including a portion of the first housing adjacent the mating opening and a portion of the second housing adjacent the mating opening with the second housing mated with the first housing, the drainage structure including:

a convex region formed in the first housing or the second housing;

a first concave region continuous with the convex region and formed in the first housing; and

a second concave region continuous with the convex region and formed in the second housing.

2. The electrical connector assembly of claim 1 , wherein the convex region, the first concave region, and the second concave region are disposed at a plurality of water receiving portions onto which water is likely to fall in the first housing and the second housing.

3. The electrical connector assembly of claim 2 , further comprising a first drainage path where water is guided on a side surface of the first housing, the first drainage path is continuous with the first concave region and is distinct from the water receiving portion of the first housing.

4. The electrical connector assembly of claim 3 , further comprising a second drainage path where water is guided on a side surface of the second housing, the second drainage path is continuous with the second concave region and is distinct from the water receiving portion of the second housing.

5. The electrical connector assembly of claim 1 , wherein the convex region has a first inclined surface formed on the first housing and descending toward a rear of the first housing.

6. The electrical connector assembly of claim 5 , wherein the convex region has a second inclined surface formed on the second housing and descending toward a rear of the second housing.

7. The electrical connector assembly of claim 6 , wherein the first inclined surface and the second inclined surface are aligned with each other in a height direction.

8. The electrical connector assembly of claim 6 , wherein the first inclined surface and the second inclined surface are offset from each other in a height direction.

9. An electrical connector assembly, comprising:

a first connector including a first housing having a mating opening;

a second connector including a second housing mated with the first connector through the mating opening; and

a drainage structure provided on and corresponding to a boundary portion including a portion of the first housing adjacent the mating opening and a portion of the second housing adjacent the mating opening with the second housing mated with the first housing, the drainage structure including:

a first drainage structure formed on the first housing including a convex region and a first concave region continuous with the convex region; and

a second drainage structure formed on the second housing including a second concave region disposed adjacent to and continuous with the convex region of the first housing.

10. The electrical connector assembly of claim 9 , wherein the first drainage structure projects from a front end of a hood of the first housing surrounding the mating opening.

11. The electrical connector assembly of claim 9 , wherein the first drainage structure includes a flat front end surface, a first inclined surface extending from the flat front end surface toward an outside of the first housing, and a recessed groove extending from the first inclined surface.

12. The electrical connector assembly of claim 11 , wherein the flat front end surface extends in a direction orthogonal to a depth direction of the first housing.

13. The electrical connector assembly of claim 11 , wherein the convex region is formed at an intersection of the first inclined surface and the recessed groove.

14. The electrical connector assembly of claim 13 , wherein the recessed groove has a V-shape or a U-shape and forms the first concave region.

15. The electrical connector assembly of claim 14 , wherein a bottom of the recessed groove defines a first drainage path extending along a side surface of the first housing.

16. The electrical connector assembly of claim 11 , wherein the second housing includes a mating block disposed on a front side of the second housing and inserted into the mating opening and a rear end wall disposed on a rear side of the second housing.

17. The electrical connector of claim 16 , wherein the mating block includes a flat surface disposed in a receiving cavity of the first housing and a second inclined surface extending from the flat surface toward the rear side and an inside of the second housing.

18. The electrical connector of claim 17 , wherein the second drainage structure includes the rear end wall, the second inclined surface of the mating block, and a stop wall recessed between the mating block and the rear end wall.

19. The electrical connector of claim 18 , wherein the stop wall forms the second concave region.

20. The electrical connector of claim 19 , wherein the stop wall defines a second drainage path in the second drainage structure extending from an upper surface of the second housing and toward a lower surface of the second housing.