Ventilation member, vented housing using the same, pull-out prevention member for ventilation member and kit for forming ventilation structure

1. A ventilation member comprising:

a breathable film transmitting gas passing through an opening portion of a housing in a state in which said breathable film is fixed to said opening portion; and

a support including a supporting portion for supporting said breathable film and an insertion portion to be inserted into said opening portion of said housing;

wherein said insertion portion is divided into a plurality of parts circumferentially at least on an insertion start side thereof;

a reinforcement material bonded to said breathable film, so that said reinforcement material and said breathable film form a laminate; and

wherein an air permeability of said laminate is in a range of 0.1–300 sec/100 cm 3 and said laminate has a water resistant pressure of not less than 1.0 kPa.

2. A ventilation member according to claim 1 , wherein a through hole is formed in said support, and said breathable film is fixed to said supporting portion so as to cover said through hole.

3. A ventilation member according to claim 1 , said insertion portion includes a plurality of leg portions at least on the insertion start side, and at least one of said leg portions is provided with a lock portion on the insertion start side thereof.

4. A ventilation member according to claim 3 , wherein said leg portions include at least one leg portion which is not provided with said lock portion.

5. A ventilation member according to claim 3 , wherein said support has a ring shape, a minimum ring width of said ring shape is larger than a distance defined between a pair of said leg portions at an end of the insertion start side of said insertion portion.

6. A ventilation member according to claim 1 , wherein a plurality of through holes are formed in a surface of said support covered with said breathable film.

7. A ventilation member according to claim 1 , wherein said support includes a seal portion on a surface of said supporting portion facing said housing.

8. A ventilation member according to claim 1 , wherein said support includes a protective portion covering at least a part of said breathable film from above of said breathable film.

9. A ventilation member according to claim 1 , wherein said breathable film includes a PTFE porous material.

10. A ventilation member according to claim 1 , wherein said breathable film is subjected to liquid-repellent treatment.

11. A vented housing comprising a ventilation member according to claim 1 , which is fixed to said opening portion of said housing.

12. A ventilation member according to claim 1 , wherein said reinforcement material is bonded to at least one side of said breathable film.