Waterproof enclosure

1. A waterproof enclosure for enclosing an electronic component, comprising:

an outer shell having a penetrating hole formed therethrough;

a waterproof filter having air permeability and covering the penetrating hole; and

a projecting part projecting from an outer surface of the outer shell and covering the penetrating hole,

wherein the projecting part includes a plurality of vent holes connecting the penetrating hole to outside space,

wherein each of the vent holes is delimited by a sloping surface extending at an angle from the outer surface toward the penetrating hole, and

wherein the projecting part includes an outer circumferential part and an inner circumferential part which are concentric hollow cylinders, a space being formed between a lateral surface of the outer circumferential part and a lateral surface of the inner circumferential part, the lateral surface of the outer circumferential part having the vent holes formed therethrough, the lateral surface of the inner circumferential part facing the vent holes formed through the lateral surface of the outer circumferential part.

2. The waterproof enclosure as claimed in claim 1 , wherein each of the vent holes is connected to the penetrating hole through two passages facing each other and formed between the outer circumferential part and the inner circumferential part.

3. The waterproof enclosure as claimed in claim 1 , further comprising one or more cover parts disposed between the vent holes and the waterproof filter to cover part of a surface of the waterproof filter, wherein coverage provided by the one or more cover parts encompasses orthogonal projections of mouths of the vent holes onto the surface of the waterproof filter.

4. The waterproof enclosure as claimed in claim 1 , further comprising one or more cover parts disposed between the vent holes and the waterproof filter to cover part of a surface of the waterproof filter, wherein coverage provided by the one or more cover parts encompasses any points at which imaginary lines passing through mouths of the vent holes intersect the surface of the waterproof filter.

5. The waterproof enclosure as claimed in claim 1 , wherein the vent holes face outwardly in a radial manner from a center of the projecting part along the outer surface.

6. The waterproof enclosure as claimed in claim 1 , wherein the vent holes are four vent holes facing outwardly in directions of arms of a cross shape from a center of the projecting part along the outer surface.

7. The waterproof enclosure as claimed in claim 1 , wherein the waterproof filter is attached to an inner surface of the outer shell.

8. The waterproof enclosure as claimed in claim 1 , wherein the outer circumferential part of the projecting part has an inner face that is a flat plane shape or a curved shape bulging toward a center of the projecting part.

9. A waterproof enclosure, comprising:

an outer shell having a penetrating hole formed through an upper surface thereof;

a waterproof filter covering the penetrating hole; and

a projecting part projecting upwardly from the upper surface of the outer shell and covering the waterproof filter,

wherein the projecting part includes a plurality of vent holes connecting the penetrating hole to outside space,

wherein each of the vent holes has a bottom surface thereof extending at an angle relative to a surface of the waterproof filter, and

wherein the projecting part includes an outer circumferential part and an inner circumferential part which are concentric hollow cylinders, a space being formed between a lateral surface of the outer circumferential part and a lateral surface of the inner circumferential part, the lateral surface of the outer circumferential part having the vent holes formed therethrough, the lateral surface of the inner circumferential part facing the vent holes formed through the lateral surface of the outer circumferential part.