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1. IN201917048497 - VENTILATION MEMBER

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The present invention relates to a ventilation member to be attached to the opening of the housing. BACKGROUND [0002] Lamp, inverter, converter, ECU (Electronic Control Unit), battery pack, automotive electrical components such as radar and camera, as well as domestic, medical, to the housing of various types of electronic equipment for the offices, etc., inside and outside of the housing or ventilate the, there may be a vent member for or to alleviate the pressure fluctuation inside the housing is mounted. The ventilation member, in addition to ventilation, depending on the specific electrical components or the like to be attached, preventing dust resistance to prevent dust from entering the enclosure, waterproof to prevent the ingress of water, the ingress of oil proof oil, and various properties of resistance to CCT, etc. to prevent the intrusion of salt are required.[0003] Patent Document 1, the ventilation member is disclosed which can satisfy the various characteristics that are breathable and requirements. The vent member disclosed in Patent Document 1, shown in Figure 13.[0004] Ventilation member 101 shown in FIG. 13, and a support member 102 and the gas permeable membrane 104. Support 102 includes a supporting portion 102a for supporting the gas permeable membrane 104, and an insertion portion 102b formed on one side of the support portion 102a. The central portion of the support portion 102a is formed with a through hole 103, the gas permeable membrane 104 so as to cover the through hole 103 is disposed on the support portion 102a. Insertion portion 102b has a cylindrical shape having substantially the same diameter as the opening 108 of the housing 107 is divided into a plurality in the circumferential direction. Insertion portion 102b has a 6 legs 102h. Of the six leg portions 102h, 3 legs 102h has a claw portion 102c. A leg portion 102h having a claw portion 102c, and the leg portions 102h not having the claw portion 102c, they are arranged alternately along the circumferential direction. Leg 102h without the claw portion 102c is provided in order to improve the stability of the ventilation member 101 after the fixing to the opening 108. Therefore, the outer periphery of the insertion portion 102h having when viewed from the front end side of the leg 102h along the central axis 110 of the vent member 101, and the outer circumferential surface of the leg portion 102h having no claw portion 102c, the claw portion 102c plane and lies in the same imaginary circle on which the center axis 110.[0005] Ventilation member 101 is fixed to the opening 108 by inserting the insertion portion 102b into the opening 108. Upon insertion into the opening 108, the claw portions 102c on the wall surface of the opening 108 that is in contact, the legs 102h having a claw portion 102c is bent in the direction of the central axis 110 of the vent member 101. Continuing pushed the ventilation member 101, together with the deflection of the said direction of the leg 102h claw portion 102c passes through the opening 108 is eliminated, engaging the inner surface of the housing 107 by eliminating the deflection sealed claw portion 102c There serves as an anchor, the ventilation member 101 is fixed to the opening 108. Between the housing 107 and the support 102, sealing member 109 is disposed.CITATIONPatent Document[0006]Patent Document 1: JP 2004-47425 JPSummary of the Invention Problems that the Invention is to Solve[0007] When fixing the ventilation member 101 to the opening 108, there is the insertion portion 102b with respect to the opening 108 is inserted obliquely. Especially, the opening 108 in a position not visible, an opening 108 is provided on the inclined surface of the housing, or, when fixing the ventilation member 101 to the automatic insertion and opening 108 is more complicated fixing the ventilation member 101 by the device the insertion portion 102b tends to be inserted obliquely. In this case, among the legs 102h having a claw portion 102c, the first deflection of the leg portions 102h in contact with the wall surface of the opening 108 is greater than the deflection of the other leg 102h. In this state, when the ventilation member 101 is further pushed without inserting direction of the insertion portion 102b is modified, the deflection of the first contact with the leg portion 102h on the wall becomes too large, the leg 102h is damaged . When the leg portion 102h is damaged, also the claw portion 102c passes through the opening 108 without being eliminated deflection of the leg portions 102h, may become difficult reliable locking of the inner surface of the housing 107 by the claw portion 102c, extreme in an example, it is destroyed excessively deflected leg 102h, problem that desorption occurs from the support 102.[0008] The present invention includes an insertion portion having a claw portion, a ventilation member insertion portion is fixed to the inserted and the opening to the opening of the housing, when the insertion portion relative to the opening is inserted obliquely also an object to provide a ventilation member that reliable fixation to the opening of the housing by the insertion part is made possible.Means for Solving the Problems[0009] The present invention is a ventilation member to be attached to the opening of the housing, when attached to the opening, a support having inner and outer gas passages become the through hole of the housing, disposed in said support is, and a gas permeable membrane closing the through hole, wherein the support  has the through hole, and a support portion to which the ventilation membrane is disposed,  extending from the support portion, have a claw portion at the tip and, while the pawl portion is inserted into said opening through said opening, said vent by the deflection in a direction toward the central axis of the vent member, engaging into the housing of the claw portion that has passed through the aperture It has an insertion portion for fixing the member to the opening, and the ventilation member limits the deflection of the said direction of the insertion portion during insertion into the aperture, the range in which the insertion portion is elastically deformed stopper having a part, vent member,it provides.The invention's effect[0010] The ventilation member according to the invention, deflection of the said direction of the insertion portion having a claw portion at the time of insertion into the opening, the stopper portion, the insertion portion is restricted to a range of elastic deformation. Deflection in the range of elastic deformation, the claw portion is reliably eliminated after passing through the aperture. Therefore, in the ventilation member according to the present invention, the insertion portion having a claw portion even when it is inserted obliquely to the opening of the housing, thereby enabling reliable fixing of the opening of the housing by the insertion part .BRIEF DESCRIPTION OF THE DRAWINGS [0011][1] Figure 1 is an exploded perspective view showing an example of the ventilation member of the present invention.FIG. 2 is a sectional view showing an example of the ventilation member of the present invention.[Figure 3A] Figure 3A is a side view showing an example of the ventilation member of the present invention.[Figure 3B] Figure 3B is a bottom view of the vent member shown in Figure 3A.FIG 3C] Figure 3C is a perspective view of the ventilation member shown in Figure 3A.[Figure 4A] Figure 4A is a side view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 3A ~ C.[Figure 4B] Figure 4B is a bottom view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 3A ~ C.[Figure 4C] Figure 4C is a perspective view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 3A ~ C.FIG. 5 is an example of the ventilation member of the present invention, it is a partial sectional view showing an example of a state where the insertion portion relative to the opening is inserted obliquely.FIG. 6 is an example of the ventilation member of the present invention, is a plan view showing an example of a state of passing through the opening of the housing.[Figure 7A] Figure 7A is a bottom view showing another example of the ventilation member of the present invention.[Figure 7B] Figure 7B is a perspective view of the ventilation member shown in FIG 7A.[FIG. 8A] Figure 8A is a bottom view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 7A ~ B.[Figure 8B] Figure 8B is a perspective view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 7A ~ B.FIG 9A] FIG 9A is a also a bottom view showing another example of the ventilation member of the present invention.[FIG. 9B] FIG 9B is a perspective view of the ventilation member shown in Figure 9A.FIG 10A] FIG 10A is a bottom view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 9A ~ B.[FIG. 10B] FIG 10B is a perspective view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 9A ~ B.FIG 11A] FIG 11A is a bottom view of still yet showing another example of the ventilation member of the present invention.FIG 11B] FIG 11B is a perspective view of the ventilation member shown in FIG. 11A.FIG 12A] FIG 12A is a bottom view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 11A ~ B.[Figure 12B] Figure 12B is a perspective view showing a state where the deflection of the insertion portion is stopped by a stopper unit in the ventilation member shown in FIG. 11A ~ B.[13] FIG 13 is an exploded perspective view showing an example of a conventional ventilation member.DESCRIPTION OF THE INVENTION [0012] Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described.[0013] A first aspect of the ventilation member of the present disclosure, a ventilation member to be attached to the opening of the housing, when attached to the opening, the support having inner and outer gas passages become the through hole of the housing and body, disposed on the support, and a gas permeable membrane closing the through hole, wherein the support  has the through hole, and a support portion to which the ventilation membrane is disposed,  from the support portion extend, has a claw portion at the tip, while the pawl portion is inserted into said opening through said opening, bending in a direction toward the central axis of the vent member, wherein the housing of the claw portion that has passed through the aperture has an insertion portion for the engagement of the body to fix the ventilation member to the opening, and the ventilation member, the deflection of the said direction of the insertion portion during insertion into the aperture, the insertion portion having a stopper portion for limiting the range of elastic deformation.[0014] In a second aspect of the present disclosure, the ventilation member of the first aspect, the supporting portion, the insertion portion further comprises a separate said stopper portion from the stopper portion, the direction upon insertion into the opening by contact with the insertion portion deflected to limit the deflection of the said direction of the insertion portion in a range in which the insertion portion is elastically deformed.[0015] In a third aspect of the present disclosure, the ventilation member of the second aspect, the stopper portion is a columnar portion extending from the support portion.[0016] In a fourth aspect of the present disclosure, the ventilation member of the second or third aspect, wherein the support has two or more of the insertion portion, when viewed from the leading end side along the central axis , the two or more insert, overlaps the virtual circle centered on the central axis, along the circle is positioned so as to be spaced apart from each other, when viewed from the leading end side along the central axis in, the stopper portion is provided between the insertion portion adjacent to each other along the circle, it is disposed so as to overlap the circle.[0017] In a fifth aspect of the present disclosure, the vent member of the fourth aspect, when viewed from the leading end side along the central axis, virtually centered on the center axis an outer peripheral surface of the stopper portion is in contact diameter of a circle, a diameter or of a virtual circle centered on the center axis an outer peripheral surface of the insertion portion is in contact.[0018] In a sixth aspect of the present disclosure, the ventilation member of the second or third aspect, when viewed from the leading end side along the central axis, wherein the stopper portion is between the central shaft and the insertion portion during, or to overlap with the central axis, it is arranged.[0019] In a seventh aspect of the present disclosure, the vent member of the sixth aspect, when viewed from the leading end side along the central axis, wherein the stopper portion is disposed so as to overlap the through-hole .[0020] In an eighth aspect of the present disclosure, the vent member of the seventh aspect, wherein the stopper portion has the vent path connected to the through-hole therein.[0021] In a ninth aspect of the present disclosure, the ventilation member of the first aspect, the support has two or more of the insertion portion, the insertion portion of each having the stopper portion, the two or more flexed evenly insertion portion to the direction, in being in contact with the stopper portions of the insertion portion adjacent to each other, deflection to the direction of the insertion portion in the range in which the insertion portion is elastically deformed is there.[0022] In a tenth aspect of the present disclosure, the vent member of the ninth aspect, wherein the stopper portion is positioned on a side of the insertion portion.[0023] In an eleventh aspect of the present disclosure, the vent member of the ninth or tenth aspect, when viewed from the leading end side along the central axis, the two or more insert, and centered on the central axis to overlap the virtual circle are disposed so as to be spaced apart from each other along the circle.[0024] In a twelfth aspect of the present disclosure, the vent member of the first to 11 any of the embodiments, when viewed from the leading end side along the central axis, an inner surface of the insertion portion, the inner surface through both the width direction of the end, it has a portion which protrudes inwardly of an imaginary circle centered on said central axis.[0025] In a thirteenth aspect of the present disclosure, the ventilation member twelfth aspect, the inner surface is planar.[0026] In a fourteenth aspect of the present disclosure, the vent member of the first to 13 any of the embodiments, comprises the insertion portion further has placed the seal member the ventilation member to surround the.[0027] In a fifteenth aspect of the present disclosure, the vent member of the first to 14 any of the embodiments, the ventilation member a protective cover that protects the gas permeable membrane further comprises.[0028] The following description is not intended to limit the invention to the particular form. Incidentally, "stopper portion", specialized to the function of limiting the range of deflection of the insertion portion, a portion (the form in the ventilation member be "independent" structure portion of the (support) within, and the insertion portion or the like regardless, the points, lines, a which may be.) a surface like, be comprised to limit the scope of the deflection of such other of the insertion portion as a result when flexed insertion portion it may be.[0029] (First Embodiment) FIG. 1, FIG. 2 and FIG. 3A ~ C, showing the ventilation member 1 of the first embodiment. Ventilation member 1 is attached to the opening 12 for ventilation of the housing 11 from the outside of the housing 11. Ventilation member 1 includes a support 2 and the gas permeable membrane 3. The through-hole 4 which is a vent path between the interior and exterior of the housing 11 when mounting the ventilation member 1 to the opening 12, the support 2 has. Vent film 3 has one open end of the through-holes 4, specifically, the outer side of the open end of the housing 11, in closed. Vent film 3, as well as passes through the gas in the thickness direction, a film for preventing transmission of the foreign matter. Therefore, the ventilation member 1, the inside and outside of the vent of the housing 11 is secured, it is possible to prevent the dust to the inside of the housing 11, water, oil, and foreign matter from entering such salts. In the present embodiment, the shape of the vent film 3 is circular. However, the shape of the vent film 3 is not limited, for example, it may be a polygonal shape.[0030] A support 5 which is permeable film 3 is arranged with a through hole 4, and an insertion portion 6 extending from the support portion 5, the support 2 has. Support 5 is substantially disk-shaped. The insertion portion 6 is formed on one side of the support 5, the extending direction of the insertion portion 6 is substantially perpendicular to the plane of the insertion portion 6 is formed in the support portion 5. In this specification, the surface on which the insertion portion 6 is formed in the support portion 5 and the lower surface to the upper surface of the surface opposite to the surface. Permeable film 3 is arranged on the upper surface of the support portion 5. Similarly, in this specification, a direction in which the insertion portion 6 extends a support portion 5 as a reference and downward, and upward direction opposite to the direction. As possible place the vent film 3 and having a through-hole 4, the shape of the support portion 5 is not limited to a substantially disk shape. As possible fix the ventilation member 1 to the opening 12, the extending direction of the insertion portion 6 may be tilted from a direction substantially perpendicular to the lower surface of the support portion 5.[0031] The insertion portion 6, from the external side of the housing 11 is inserted into a circular opening 12, to fix the ventilation member 1 to the opening 12. Support 2, two or more of the insertion portion 6 has (6a, 6b, 6c) a. When viewed from below along the central axis 20 of the ventilation member 1, 2 or more of the insertion portion 6, such that each of the outer peripheral surface 15 is located on the circle 13, evenly spaced from one another along a circle 13 It is located. Circle 13 is an imaginary circle around the central axis 20 of the ventilation member 1, has the same center and the opening 12. A circular region 14 that the virtual circle 13 and the peripheral, the 2 or more of the insertion portion 6 is disposed. Diameter of the circle 13 in the illustrated embodiment, is less than the diameter of the opening 12. When viewed from below along the central axis 20, each of the outer peripheral surface 15 is located on the circle 13, as spaced unequally from each other along a circle 13, two or more of the insertion portion 6 has been arranged it may be. When viewed from below along the central axis 20, two or more of the insertion portion 6 is arranged so as to surround the through-hole 4, a space surrounded by the insertion portion 6 and the air passage of the housing 11 and out Become.[0032] Whereas the outer peripheral surface 15 of the insertion portion 6 is curved, the inner surface 17 of the insertion portion 6 is planar. This embodiment has a large area of ​​the cross section of the insertion section 6 (cross-section perpendicular to the extending direction of the insertion portion 6), in order to the deflection of the restriction of the insertion portion 6 upon insertion into the opening 12 becomes more reliable preferable. When viewed from below along the central axis 20, the inner surface 17 of the insertion portion 6, both ends 18a in the width direction (direction perpendicular to a plane with respect to the extending direction of the insertion portion 6), 18b the pass may be formed along the imaginary circle 31 around the center axis 20 of the ventilation member 1. When viewed from below along the central axis 20, the insertion portion 6 preferably has a flared portion inside the circle 31, the insertion portion 6 of the illustrated embodiment has the projecting portion .[0033] Insertion section 6 has a pawl portion 7 at the tip. Claw portion 7 passes through the opening 12 when the insertion section 6 is inserted into the opening 12, it is engaged with the housing 11 after passing through. By the locking of the pawl portion 7 of the housing 11, the ventilation member 1 is fixed to the opening 12, from falling out of the opening 12 is prevented. Since the insertion portion 6 is inserted from the outside of the housing 11 in this embodiment, the claw portion 7 is locked to the inner surface of the housing 11. The protruding shape from the outer peripheral surface 15 of the insertion portion 6 in a direction away from the central axis 20, the claw portion 7 has. 2 or more of the insertion portion 6a, 6b, the protruding end 19 of each of the claw portions 7 in 6c, when viewed from below along the central axis 20, located on the same circle 32. Circle 32 is an imaginary circle around the central axis 20 of the ventilation member 1. Diameter of the circle 32 is larger than the diameter of the opening 12. When viewed from below along the central axis 20, the claw portion 7 a portion 22a which spacing (width) is maximum between one side surface 22 and the other side surface 22 has. Portion 22a has a connection part 15a between the outer peripheral surface 15, located between the projecting end 19.[0034] While the claw portion 7 passes through the opening 12, it deflects the insertion portion 6 in the direction toward the central axis 20 of the ventilation member 1. The insertion portion 6 deflection is caused by the claw portions 7 upon insertion into the opening 12 is pressed into contact with the wall 16 of the opening 12. By inserting portion 6 in the direction is deflected, the pawl portion 7 can pass through the opening 12 during insertion into the opening 12.[0035] Ventilation member 1 of this embodiment has three insertion portion 6a, 6b, 6c. However, the number of the insertion portion 6 having the ventilation member 1 is not limited. The number of the insertion portion 6 in the ventilation member 1 of this embodiment, for example, from 2 to 6. While it low insertion resistance to the opening 12, the dropout is suppressed ventilation member 1 from the opening 12, since it is possible to stably fixed, the number of the insertion portion 6 in the ventilation member 1 of this embodiment, 3 or 4 are preferred.[0036] Ventilation member 1 of this embodiment, the support 5 and more specifically, further includes a stopper portion 8 which is independent from the insertion portion 6. Stopper portion 8 is a columnar portion extending from the support portion 5. Stopper portion 8 is brought into contact with the insertion portion 6 flexed toward the central axis 20 upon insertion into the opening 12, the bending of the said direction of the insertion portion 6, in a range where the insertion portion 6 is elastically deformed restrict (see FIG. 4A ~ C). In the state shown in FIG. 4A ~ C, the deflection of the insertion portion 6 in contact with the stopper portion 8 is in this range.[0037] As shown in FIG. 5, when you try to insert the insertion portion 6 at an angle with respect to the opening 12, the deflection of the above direction of the insertion portion 6a that first contacts the wall surface 16 of the opening 12, remains insertion portion 6b, 6c It is greater than the deflection of. In this state, when the ventilation member 1 is further pushed into the opening 12, further bends the insertion portion 6a toward the central axis 20. However, the deflection, by contact with the stopper portion 8, the insertion portion 6a is limited to a range of elastic deformation. Inserting portion 6b remaining is the same for the deflection of 6c, the insertion portion 6a, 6b, 6c deflection of the pawl portion 7 is reliably eliminated after passing through the opening 12.[0038] Further, as shown in FIG. 5, after which the insertion portion 6a and the stopper portion 8 is in contact, the ventilation member 1 without inserting direction is corrected in the insertion portion 6 with respect to the opening 12 is also about to be further pushed into the opening 12 , the force pushed the acts with respect to the opening 12 as a force 21 for changing the direction of insertion as the insertion direction becomes more straight. Therefore, if the insertion direction of the insertion portion 6 is modified naturally or wearer or mounting device of the ventilation member 1 felt the force insertion even if the insertion direction by the interference between the members unmodified naturally because it can modify the direction, all of the insertion portion 6, so that can be inserted into the opening 12 by the deflection by elastic deformation.[0039] As shown in FIG. 3A ~ C, when viewed from below along the central axis 20, between the side 22 of the insertion portion 6 adjacent to each other along a circle 13, it overlaps the circle 13, and the outer periphery of each as surface 24 is positioned on the circle 23, the stopper portion 8 is arranged. Circle 23 is an imaginary circle around the central axis 20 of the ventilation member 1. Diameter of the circle 23 in the illustrated embodiment, the outer peripheral surface 15 of the insertion portion 6 is equal to the diameter of a circle 13 located. Diameter of the circle 23 may be less than the diameter of the circle 13. In the illustrated embodiment, the insertion portion 6 in the direction toward the central axis 20 is largely bent, the claw portion 7 of the insertion portion 6 is in contact with the stopper portion 8. In the ventilation member 101 of Patent Document 1, also flexes leg 102h having a claw portion 102c at the time of insertion into the opening 108 is large, and the leg portions 102h, each other and the leg portion 102h having no claw portion 102c do not come into contact.[0040] Stopper portion 8 of the present embodiment, the width perpendicular to the extending direction has a shape that is constant in the direction. However, variations in the molding technique on unavoidable width of the stopper portion 8, for example, ± 0.3 mm or less of the variation, but also when seen in the direction, the width of the stopper portion 8 is constant. Further, the stopper portion 8 of the present embodiment, the length of the extending direction is the same as the length of the extending direction of the insertion portion 6. However, the difference in length, for example, in the case of ± 0.3 mm or less, the same in length.[0041] As shown in FIG. 6, the insertion portion 6 and the stopper portion 8, the shape and all the claw portion 7 may take a state in which all of the insertion portion 6 and all of the stopper portion 8 is not in contact with each other when passing through the opening 12 arrangement may have. In this case, the clearance between the insertion portion 6 and the stopper portion 8 of when the protruding end 19 of all the pawl portion 7 is in contact with the wall surface 16 of the opening 12 is, for example, 0.2mm or less.[0042] Ventilation member 1 further comprises a seal member 9 which is disposed so as to surround the insertion portion 6. Sealing member 9 is provided between the outer surface of the lower surface and the housing 11 of the support portion 5 when fixed to the opening 12 of the ventilation member 1, preventing the inner and outer vent body 11 at a portion other than the through-hole 4. Thus, it is possible to prevent the dust to the inside of the housing 11 through the opening 12, water, oil, and foreign matter from entering such salts more reliably. Sealing member 9 of this embodiment is a seal ring of circular cross section composed of an elastic material. When designing the support 2 so that the state where the seal ring is crushed when fixed to the opening 12 of the ventilation member 1, the sealing by the seal rings becomes more reliable. Further, the support portion 5 by the sealing rings crushed by force to push upward acts, locking of the ventilation member 1 according to the claw part 7 becomes stronger, it is possible to prevent falling off of the ventilation member 1 more reliably. In FIG. 2, the sealing member 9 is illustrated a state in which crushed a seal ring.[0043] In the case where at the time of fixation to the opening 12 of the housing 11 includes a sealing member 9 also, the ventilation member 1 in a state in which no sealing member 9 can be circulated.[0044] Ventilation member 1 further comprises a protective cover 10 for protecting the vent film 3. Protective cover 10 is arranged on the upper surface of the support portion 5 so as to cover the gas permeable membrane 3. The protective cover 10, damage to the gas permeable membrane 3 due to foreign matter such as water which is coming from the outside is prevented. Further, as shown in FIG. 2, a plurality of openings 25 are provided on the side surface of the protective cover 10 can be discharged foreign matter that has entered the protective cover 10 from the opening 25.[0045] The gas permeable membrane 3, the woven fabric composed of resin or metal, nonwoven, mesh or net, or the resin porous membrane can be used. However, while passing through the gas, as much as possible to prevent the transmission of foreign matter such as a liquid, the vent film 3 is not limited. In the present embodiment, the resin porous membrane, the permeable film 3 formed by laminating a reinforcing layer having air permeability are used. The reinforcing layer can improve the strength of the gas permeable membrane 3. Resin porous membrane, for example, a known stretching method, or a fluorine resin porous body can be produced by extraction, and a polyolefin porous body. Fluororesins, such as polytetrafluoroethylene (PTEF), polychlorotrifluoroethylene, tetrafluoroethylene - hexafluoropropylene copolymer, tetrafluoroethylene - perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene - ethylene copolymerization it is united. Monomers constituting the polyolefin, such as ethylene, propylene, 4-methylpentene-1,1 butene, the polyolefin is a homopolymer or copolymer of these monomers can be used to vent film 3. Polyacrylonitrile, nylon, or a nanofiber film porous body using polylactic acid may be used to vent film 3. Among them, it is possible to ensure ventilation with a small area, it is preferable that the capacity is high PTFE porous body to prevent foreign material from entering the interior of the housing 11 using the vent film 3. The average pore diameter of the PTFE porous body is preferably 0.01μm or more 10μm or less. Reinforcing layer, for example, woven fabric composed of resin or metal, nonwoven, mesh, net, sponge, foam, and a porous body. The resin porous membrane with the reinforcing layer, adhesive lamination, heat lamination, heat welding, ultrasonic welding, can be laminated by a method such as bonding with an adhesive.[0046] Permeable film 3 may be liquid-repellent treatment. Liquid-repellent gas permeable membrane 3, a liquid repellent agent containing a substance with small surface tension is applied to the breathable film it can be carried out by drying the coating film formed by coating. Repellent agent include, for example, a polymer having a perfluoroalkyl group as the substance. Application of repellent agent can, for example, air spraying, electrostatic spraying, dip coating, spin coating, roll coating, curtain flow coating method can be carried out by a method of impregnation method or the like.[0047] The thickness of the gas permeable membrane 3, taking into account the fixing of the ease of the strength and the support portion 5, for example, can be adjusted by 5mm below the range of 1 [mu] m. Air permeability of the vent film 3, in the Japanese Industrial Standards (JIS) L1096 in a defined permeability measurement B method air permeability was measured according to (Gurley Katachiho) (Gurley air permeability), for example, 0. from 1 to 300 seconds / 100mL.[0048] Permeable film 3 may be bonded to the support portion 5, the bonding of the vent film 3 to the supporting portion 5, thermal welding, ultrasonic welding, can be carried out by various welding methods such as laser welding. By insert molding with the support 2 a gas permeable membrane 3, the gas permeable membrane 3 may be disposed in the support portion 5.[0049] Support 2 and the protective cover 10 includes a support portion 5 and the insertion portion 6, for example, a resin. These members composed of resin has good moldability. These members are injection molding, compression molding, can be formed by a known molding method of the powder molding. For the support 2, it is preferable to integrally form the support portion 5 and the insertion portion 6. Because it can improve the mass productivity of the ventilation member 1 is preferably molded of a support 2 by injection molding. The resin constituting the support 2, is typically a thermoplastic resin. Thermoplastic resin such as polyamide such as nylon (PA), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polycarbonate (PC), polypropylene (PP), polyphenylene ether (PPE) is there. The resin constituting the support 2, carbon black, pigments such as titanium white; glass particles, reinforcing fillers such as glass fibers; may contain additives such as and water-repellent material. On the surface of each member, the liquid-repellent treatment may be made. Liquid-repellent treatment can be carried out by film formation or the like by the above-described method, electrodeposition coating method, or plasma polymerization liquid-repellent treatment of the vent film 3.[0050] The protective cover 10 may be bonded to the supporting member 2. Bonding of the protective cover 10 to the support 2, thermal welding, ultrasonic welding, can be carried out by various welding methods such as laser welding.[0051] The material constituting the sealing member 9, for example, ethylene propylene diene rubber (EPDM), nitrile rubber (NBR), fluoro rubber, an elastomer of the acrylic rubber, hydrogenated nitrile rubber, and silicone rubber.[0052] Housing 11 is formed of, for example, a resin, a metal, or composite material thereof.[0053] (Second Embodiment) FIG. 7A and 7B, shows the ventilation member 51 of the second embodiment. The second embodiment, except that the shape and arrangement of the stopper portion 8 having the supporting portion 5 is independent of the insertion portion 6 is different, the same as the first embodiment. Description overlapping the first embodiment will be omitted.[0054] As shown in FIGS. 7A and 7B, the stopper portion 8 is a columnar portion extending from the support portion 5. When viewed from below along the central axis 20, a stopper portion 8 between the insertion portion 6 and the central axis 20 is arranged. More specifically, when viewed from below along the central axis 20, a stopper portion 8 to overlap with the central axis 20 is arranged. Support 2 of the second embodiment is excellent in moldability as compared with the support 2 of the first embodiment. Stopper portion 8, by contact with the insertion portion 6 flexed toward the central axis 20 upon insertion into the opening 12, the insertion portion 6 of the bending of the insertion portion 6 of the said direction is limited to a range of elastic deformation (see FIGS. 8A and 8B). In the state shown in FIGS. 8A and 8B, the deflection of the insertion portion 6 in contact with the stopper portion 8 is in the range. When the insertion portion 6 in the direction toward the central axis 20 is largely bent, the distal end portion 17a of the inner surface 17 contacts the stopper portion 8.[0055] When viewed from below along the central axis 20, a stopper portion 8 to overlap with the through-holes 4 are arranged. Further, the stopper portion 8, a cylindrical, a cylindrical, more specifically, has a vent path connected to the through hole 4 therein. In other words, the space inside the cylinder of the stopper portion 8 is a cylindrical is connected to the through-hole 4, the space constitutes a ventilation channel.[0056] Inner surface 17 of the insertion portion 6 is planar. This embodiment is preferably for the reasons discussed above in the description of the first embodiment, also, can be brought into contact with the stopper portion 8 and the inserting portion 6 in a state that a small deflection of the insertion portion 6, thereby, to the opening 12 preferable because the deflection of the limitations of the insertion portion 6 upon the insertion becomes more reliable. The inner surface 17 of the insertion portion 6 is the a plane, equal changing of the outer diameter of the stopper portion 8 is a cylindrical is easy, the degree of freedom in design of the stopper portion 8 is improved.[0057] Even in the ventilation member 51, the insertion portion 6 and the stopper portion 8, all of the claws 7 shape and arrangement of all of the insertion portion 6 and all of the stopper portion 8 when passing through the aperture 12 can take a state not in contact with each other it may have.[0058] (Third Embodiment) FIG. 9A and 9B, showing the ventilation member 52 of the third embodiment. The third embodiment, chromatic includes the support portion 5 is independent of the insertion portion 6, and with the shape of the cross section of the support portion 5 is a columnar portion extending from the stopper portion 8 is different, the stopper portion 8 has a vent passage except Otherwise, the same as the second embodiment. Description overlapping with the second embodiment is omitted.[0059] As shown in FIGS. 9A and 9B, a star-shaped cross-section with a protruding portion 53 which protrudes from the central axis 20 in three directions, the stopper portion 8 has. When viewed from below along the central axis 20, a stopper portion 8 to overlap with the through-holes 4 are arranged in three protrusions 53, the stopper portion 8 is connected to the lower surface of the support portion 5 there. When viewed from below along the central axis 20, toward the inner surface 17 of the insertion portion 6a, 6b or 6c, each of the three protrusions 53 protrude. When viewed from below along the central axis 20, the angle between the direction in which three protrusions 53 protrude is uniform, are both 120 degrees. Stopper portion 8, by contact with the insertion portion 6 flexed toward the central axis 20 upon insertion into the opening 12, the insertion portion 6 of the bending of the insertion portion 6 of the said direction is limited to a range of elastic deformation (see FIGS. 10A and 10B). In the state shown in FIGS. 10A and 10B, bending of the insertion portion 6 in contact with the stopper portion 8 is in the range. When the insertion portion 6 in the direction toward the central axis 20 is largely bent, the distal end portion 17a of the inner surface 17 contacts the stopper portion 8. Stopper portion 8 having the shape of the cross section itself hardly very flexure, also only one insertion portion 6a in each case in contact with the protrusion 53, contact with the protruding portion 53 to the applied force to the other two You can escape by dispersing the protrusion 53. Therefore, deflection of the stopper portion 8 itself is reliably prevented by the contact between the insertion portion 6, the deflection of the restriction of the insertion portion 6 is more reliably.[0060] Even in the ventilation member 52, the insertion portion 6 and the stopper portion 8, all of the claws 7 shape and arrangement of all of the insertion portion 6 and all of the stopper portion 8 when passing through the aperture 12 can take a state not in contact with each other it may have.[0061] (Fourth Embodiment) FIG. 11A and 11B, showing the ventilation member 61 of the fourth embodiment. As shown in FIGS. 11A and 11B, the support 2 of the ventilation member 61 of this embodiment, two or more of the insertion portion 6, in particular having four insertion portion 6a, 6b, 6c and 6d, the there. Also, each of the insertion portion 6 has a stopper portion 62 to the distal end portion of both side surfaces 22. Although the stopper portion 8 having the first ventilation member 1,51,52 of the third embodiment is independent from the insertion portion 6, one stopper portion 62 of the insertion portion 6 of the ventilation member 61 of the fourth embodiment has it is a part. When viewed from below along the central axis 20, two or more of the insertion portion 6, located each of the outer peripheral surface 15 on the circle 13, are arranged so as to evenly spaced from one another along a circle 13 . Moreover, the circular area 14 to the circular 13 and circumferential, two or more of the insertion portion 6 is disposed. When viewed from below along the central axis 20, each of the outer peripheral surface 15 is located on the circle 13, as spaced unequally from each other along a circle 13, two or more of the insertion portion 6 has been arranged it may be.[0062] As shown in FIGS. 12A and 12B, the ventilation member 61, the insertion portion 6a toward the central axis 20, 6b, 6c, flexed equalize 6d, the insertion portion 6a adjacent, 6b, 6c, 6d of in a state where the stopper portion 62 to each other is in contact with each other, the insertion portion 6a, 6b, 6c, bending the insertion portion 6a of the above direction 6d, 6b, 6c, 6d are in the range of elastic deformation (hereinafter, the ventilation member the features 61 have described as "characteristic a"). Thus, the ventilation member 61, deflection of the said direction of the insertion portion 6 upon insertion into the opening 12 of the housing 11, by the abutment between the stopper portion 62 of the insertion portion 6 adjacent to each other, the insertion portion 6 There is limited to a range of elastic deformation. Therefore, deflection of each of the insertion portion 6, the claw portion 7 is reliably eliminated after passing through the opening 12. Incidentally, the insertion portion 6a, 6b, 6c, and deflects to equalize the 6d, for example, when viewed from below along the central axis 20, the insertion portion 6a, 6b, 6c, the inner surface 17 of 6d, more specific examples tip 17a of the inner portion 17, a means to deflect the same distance equal to said direction. Further, the ventilation member 101 of Patent Document 1, also flexes leg 102h having a claw portion 102c at the time of insertion into the opening 108 is large, and the leg portion 102h, do not contact each other and the leg 102h adjacent thereto.[0063] As long as the filled feature A, the stopper portion 62 may be located in a portion other than the distal end portion of the side surface 22 of the insertion portion 6 may be positioned in a portion other than the side surface 22 of the insertion portion 6.[0064] The number of the insertion portion 6 in the ventilation member 61 of this embodiment is, for example, 3 to 6. While the insertion resistance to the opening 12 can be decreased, it is possible to suppress detachment of the ventilation member 61 from the opening 12, Furthermore, since the achievement of the characteristic A by the stopper portion 62 becomes more reliable, the ventilation member of the present embodiment the number of the insertion portion 6 of 61, preferably 4 or 5.[0065] The insertion portion 6, as long as the filled features A, can have any configuration.[0066] Each member and portions of the fourth embodiment, as long as the filled features A, may have the same configuration as the members and parts of the first embodiment shown by the same reference numerals.[0067] The present invention, without departing from its spirit and essential characteristics, can be applied to other embodiments. Implementation disclosed in this specification embodiments are not limited thereto be those illustrative in all respects. Scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.Industrial Applicability[0068] Ventilation member of the present invention can be used in the same manner as in the conventional ventilation member applications.[0069] [ Description of Reference   Numerals] 1 ventilation member   2 supports   3 breathable film   4 through holes   5 supporting portion   6 the insertion portion   6a, 6b, 6c insertion portion   7 claw portion   8 stopper   9 sealing member  10 a protective cover  11 housing  12 opening  13 £  14 region  15 outer peripheral surface  16 wall  17 inner surface  17a tip  18a, 18b end portion  19 protruding end  20 central axis  21 forces  22 side  22a portion  23 £  24 peripheral surface  25 openings  31 yen  32 £  51 vent member  52 ventilation member  53 protrusion  61 ventilation member  62 stopper portion 101 vent member 102 supports 102a supporting portion 102b inserted portion 102c claw portion 102h legs 103 through hole 104 gas permeable membrane 107 housing 108 opening 109 sealing member