JP4883809B2

JP4883809B2 - Ventilation member

Info

Publication number: JP4883809B2
Application number: JP2008248353A
Authority: JP
Inventors: 浩明益子; 俊輝柳; 弘行西井; 佳樹池山
Original assignee: Nitto Denko Corp
Current assignee: Nitto Denko Corp
Priority date: 2002-05-15
Filing date: 2008-09-26
Publication date: 2012-02-22
Anticipated expiration: 2023-02-20
Also published as: JP2009029423A

Description

本発明は、自動車用電装部品などの筐体に固定される通気部材、その通気部材が固定された筐体に関するものである。 The present invention relates to a ventilation member fixed to a housing such as an automobile electrical component, and a housing to which the ventilation member is fixed.

ＥＣＵ（ｅｌｅｃｔｒｏｎｉｃｃｏｎｔｒｏｌｕｎｉｔ）、ランプ、モーター、各種センサー、圧力スイッチ、アクチュエーターなどの自動車用電装部品、携帯電話、カメラ、電気剃刀、電動ハブラシおよび屋外用途のランプなどの各種筐体には通気部材が装着されている。 Ventilation members are included in various housings such as ECU (Electronic Control Unit), lamps, motors, various sensors, pressure switches, actuators, and other automotive electrical components, mobile phones, cameras, electric razors, electric toothbrushes, and outdoor lamps. It is installed.

上記通気部材は、筐体の内部へ水や粉塵が侵入することを防止しつつ、音声の伝搬、筐体内部で発生したガスの放出、温度変化による筐体内部の圧力変化の緩和など、装着される筐体の種類に応じて種々の役割を果たす。 The ventilation member is installed to prevent the intrusion of water and dust into the inside of the case, while propagating sound, releasing gas generated inside the case, reducing pressure changes inside the case due to temperature changes, etc. It plays various roles depending on the type of housing to be used.

図１７（ａ）および（ｂ）に従来の通気部材の一例を示す。図１７（ａ）および（ｂ）に示す通気部材５１は、風雨、泥水、油類などの汚染物にさらされる機器筐体、例えば、自動車用電装部品に使用されるものである。通気部材５１は、Ｌ字形、コ字形(図示せず)の管状体であり、あるいはその内部に迷路５２を有した構造をしている。この通気部材５１は、その一端を筐体５０に設けられた首部５０ａに外嵌することで、筐体に固定される。 An example of the conventional ventilation member is shown to Fig.17 (a) and (b). The ventilation member 51 shown to Fig.17 (a) and (b) is used for the apparatus housing | casing exposed to contaminants, such as a wind and rain, muddy water, oils, for example, the electrical component for motor vehicles. The ventilation member 51 is an L-shaped or U-shaped (not shown) tubular body, or has a structure with a labyrinth 52 therein. The ventilation member 51 is fixed to the casing by fitting one end of the ventilation member 51 to a neck portion 50 a provided in the casing 50.

図１８（ａ）および（ｂ）に、従来の通気部材の他の一例を示す。図１８（ａ）および（ｂ）に示す通気部材６０は、カバー部品６１の内部に略筒状体６２が嵌装され、カバー部品６１の内周と略筒状体６２の外周との間、およびカバー部品６１の底面と略筒状体６２の底部との間に通気路が形成されている。通気部材６０は、略筒状体６２の底部開口をフィルタ６３によって被覆することにより、より高い防水性、防塵を発揮することもできる（特許文献１に記載）。この通気部材６０は、略筒状体６２の頂部開口６２ａを筐体５０の首部５０ａに外嵌することで、筐体に固定される。 18 (a) and 18 (b) show another example of a conventional ventilation member. 18 (a) and 18 (b), a substantially cylindrical body 62 is fitted inside a cover part 61, and between the inner periphery of the cover part 61 and the outer periphery of the substantially cylindrical body 62, A ventilation path is formed between the bottom surface of the cover part 61 and the bottom portion of the substantially cylindrical body 62. The ventilation member 60 can also exhibit higher waterproofness and dust resistance by covering the bottom opening of the substantially cylindrical body 62 with the filter 63 (described in Patent Document 1). The ventilation member 60 is fixed to the housing by fitting the top opening 62 a of the substantially cylindrical body 62 to the neck 50 a of the housing 50.

図１９に、従来の通気部材の他の一例を示す。図１９に示した通気部材７０は、円板状のエラストマー部材７１の一方端部にテーパー状の挿入部７１ａが形成され、他方端部には飛沫遮断カバー７１ｂが形成されており、一方端部から他方端部の外周に貫通する通気流路の途中に通気膜７２が溶着固定されている。また、エラストマー部材７１の外周には、挿入部７１ａと共同して筐体７を固持するシール固定部７１ｃが形成されている（特許文献２に記載）。この通気部材７０は、筐体の開口部に挿入部７１ａを圧入することで、筐体に固定される。
特開２００１−１４３５２４号公報（第３−５頁、図１、図４）特開平１０−８５５３６号公報（第２−３頁、図２） FIG. 19 shows another example of a conventional ventilation member. A ventilation member 70 shown in FIG. 19 has a tapered insertion portion 71a formed at one end portion of a disk-shaped elastomer member 71, and a splash blocking cover 71b formed at the other end portion. The gas permeable membrane 72 is welded and fixed in the middle of the gas flow path that penetrates the outer periphery of the other end. In addition, a seal fixing portion 71c that holds the housing 7 together with the insertion portion 71a is formed on the outer periphery of the elastomer member 71 (described in Patent Document 2). The ventilation member 70 is fixed to the casing by press-fitting the insertion portion 71a into the opening of the casing.
JP 2001-143524 A (page 3-5, FIG. 1, FIG. 4) JP 10-85536 A (page 2-3, FIG. 2)

しかしながら、上記した通気部材には以下の問題点がある。図１７および図１８に示した通気部材５１および６０は、いずれも筐体５０の首部５０ａに外嵌することのみによって筐体５０に固定されているため、引き抜かれるおそれがある。 However, the ventilation member described above has the following problems. Since the ventilation members 51 and 60 shown in FIGS. 17 and 18 are both fixed to the casing 50 only by being externally fitted to the neck 50a of the casing 50, they may be pulled out.

一方、図１９に示した通気部材７０は、筐体７と当接する面がエラストマー製であるため、筐体７と当接する面の一部に油が浸入すると、通気部材７０が筐体から抜け易くなる。このため、通気部材７０は、油が付着し易い環境下で使用される筐体の通気部材としては適していると言えない。 On the other hand, the ventilation member 70 shown in FIG. 19 is made of an elastomer on the surface that comes into contact with the housing 7. Therefore, when oil enters a part of the surface that comes into contact with the housing 7, the ventilation member 70 comes out of the housing. It becomes easy. For this reason, the ventilation member 70 cannot be said to be suitable as a ventilation member for a casing used in an environment where oil is likely to adhere.

本発明の通気部材は、筐体の開口部に固定された状態で、前記開口部を通過する気体が透過する通気膜を含む通気部材であって、前記通気膜を支持する支持部と前記開口部へ挿入される挿入部とを有する支持体をさらに含み、前記挿入部の少なくとも挿入開始側が周方向に沿って複数に分割されていることを特徴とする。 The ventilation member according to the present invention is a ventilation member including a ventilation film that allows gas passing through the opening to pass through in a state of being fixed to the opening of the housing, and the support and the opening that support the ventilation film And a support body having an insertion part inserted into the part, wherein at least the insertion start side of the insertion part is divided into a plurality of parts along the circumferential direction.

本発明の通気筐体は、本発明の通気部材が、筐体の開口部に固定されていることを特徴とする。 The ventilation casing of the present invention is characterized in that the ventilation member of the present invention is fixed to an opening of the casing.

本発明の通気部材とともに使用される通気部材の抜け防止具であって、前記開口部を突き抜けるように前記開口部へ挿入された前記挿入部に挿入されて、前記挿入部を内側から押し広げる柱状部を含み、前記柱状部には、前記挿入部に挿入された状態で、前記貫通孔と連通する通気孔が形成されていることを特徴とする。 A vent member escape prevention tool used together with the vent member of the present invention, wherein the vent member is inserted into the insertion portion inserted into the opening portion so as to penetrate the opening portion, and the columnar shape expands the insertion portion from the inside. The columnar part is formed with a vent hole communicating with the through hole in a state of being inserted into the insertion part.

本発明の通気部材と本発明の通気部材の抜け防止具とからなることを特徴とする通気構造形成キット。 A ventilation structure forming kit comprising the ventilation member of the present invention and the prevention member for removing the ventilation member of the present invention.

以上のように本発明によれば、筐体から引き抜かれるおそれが低減された通気部材、およびこれを用いた通気筐体を提供できる。 As described above, according to the present invention, it is possible to provide a ventilation member that is less likely to be pulled out of the casing, and a ventilation casing using the ventilation member.

本発明における好ましい実施の形態を、図面を参照しながら説明する。 Preferred embodiments of the present invention will be described with reference to the drawings.

（実施の形態１）
図１〜図６を用いて本発明の通気部材の一例について説明する。図１および図２に示すように、通気部材１は、支持体２と、通気膜４とを含んでいる。支持体２は、通気膜４を支持するための支持部２ａと、前記支持部２ａの一方の側に形成された挿入部２ｂとを含んでいる。支持体２の中央部には、支持部２ａおよび挿入部２ｂを貫通する貫通孔３が形成されており、この貫通孔３を被覆するようにして通気膜４が支持部２ａに固着されている。 (Embodiment 1)
An example of the ventilation member of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the ventilation member 1 includes a support 2 and a gas permeable membrane 4. The support body 2 includes a support portion 2a for supporting the gas permeable membrane 4 and an insertion portion 2b formed on one side of the support portion 2a. A through hole 3 penetrating the support portion 2a and the insertion portion 2b is formed at the center of the support body 2, and the gas permeable membrane 4 is fixed to the support portion 2a so as to cover the through hole 3. .

挿入部２ｂは、筐体７の開口部８とほぼ同径の円柱状であり、前記挿入部２ｂの少なくとも挿入開始側が周方向に沿って複数に分割されている。挿入部２ｂは、少なくとも挿入開始側に形成された複数の脚部２ｈを含んでおり、隣り合う脚部２ｈの間にはスリット２ｉが形成されている。複数の脚部２ｈのいずれもが、その挿入開始側端部に外周がテーパー状に加工された係止部２ｃを含んでいる。 The insertion portion 2b has a columnar shape having substantially the same diameter as the opening 8 of the housing 7, and at least the insertion start side of the insertion portion 2b is divided into a plurality along the circumferential direction. The insertion portion 2b includes at least a plurality of leg portions 2h formed on the insertion start side, and a slit 2i is formed between adjacent leg portions 2h. Each of the plurality of leg portions 2h includes a locking portion 2c whose outer periphery is processed into a tapered shape at the end portion on the insertion start side.

通気部材１を筐体７の開口部８に固定するに際して、挿入部２ｂを開口部８へ挿入すると、係止部２ｃが開口部８に押圧され、分割された挿入部２ｂ（脚部２ｈ）が内方に撓むため、筐体７に対する通気部材１の挿入圧が低減される。係止部２ｃは、開口部８を通過し押圧から解放されると、筐体の内面に係止され、通気部材１は筐体７に固定される。通気部材１は、一旦筐体７に固定されると通気部材１および／または筐体７が破壊されるほどに引っ張らなければ筐体７の外側から取り外すことができず、筐体７から取り外されるおそれが低減されている。 When the insertion member 2b is inserted into the opening 8 when the ventilation member 1 is fixed to the opening 8 of the housing 7, the locking portion 2c is pressed by the opening 8 and the divided insertion portion 2b (leg portion 2h). Is bent inward, the insertion pressure of the ventilation member 1 with respect to the housing 7 is reduced. When the locking portion 2 c passes through the opening 8 and is released from the pressure, the locking portion 2 c is locked to the inner surface of the housing, and the ventilation member 1 is fixed to the housing 7. Once the ventilation member 1 is fixed to the housing 7, it cannot be removed from the outside of the housing 7 unless it is pulled to such an extent that the ventilation member 1 and / or the housing 7 is broken, and is removed from the housing 7. The fear is reduced.

図１および図２に示した例では、挿入部２ｂの挿入開始側は、周方向に沿って３つに分割されているが、これに限定されるものではなく、分割数は２、または４以上であってもよい。また、図１および図２に示した例では、挿入部２ｂの長手方向の一部が複数に分割されているが、これに限定されるものではなく、挿入部２ｂの長手方向全体が複数に分割されていてもよい。また、複数の脚部２ｈの全てが係止部２ｃを含んでいるが、少なくとも１つ、好ましくは２つ以上の脚部２ｈが係止部２ｃを含んでいればよい。また、係止部２ｃは、挿入部２ｂの挿入開始側の先端から０．１ｍｍ以上離れた箇所から形成するとよい。挿入部２ｂの挿入開始側端部にストレート部分があると、挿入部２ｂの筐体の開口部８への挿入が容易となるからである。 In the example shown in FIG. 1 and FIG. 2, the insertion start side of the insertion portion 2b is divided into three along the circumferential direction, but the present invention is not limited to this, and the number of divisions is two or four. It may be the above. Further, in the example shown in FIGS. 1 and 2, a part of the insertion portion 2b in the longitudinal direction is divided into a plurality of parts. However, the present invention is not limited to this. It may be divided. Moreover, although all the some leg parts 2h contain the latching | locking part 2c, at least one, Preferably the 2 or more leg part 2h should just contain the latching | locking part 2c. Moreover, it is good to form the latching | locking part 2c from the location 0.1 mm or more away from the front-end | tip of the insertion start side of the insertion part 2b. This is because if there is a straight portion at the insertion start side end of the insertion portion 2b, the insertion portion 2b can be easily inserted into the opening 8 of the housing.

支持部２ａの形状は、特に限定されないが、図１および図２に示した例では、挿入部２ｂよりも大きい径を有するディスク状をしている。この支持部２ａは、筐体７に形成された開口部８よりも大きい径を有し、開口部８を覆うように配置することができる。 The shape of the support portion 2a is not particularly limited, but in the example shown in FIGS. 1 and 2, it has a disk shape having a diameter larger than that of the insertion portion 2b. The support portion 2 a has a larger diameter than the opening portion 8 formed in the housing 7 and can be arranged so as to cover the opening portion 8.

また、図２（ｂ）に示したように、通気膜４によって被覆された支持部２ａの表面は曲面となっている。このように、支持部２ａの表面が、周縁部が中央部よりも低くなった曲面である通気部材は、水はけ性が良くなるので、水による影響を受け易い環境で使用される筐体の通気部材として好適である。尚、支持部２ａの表面を上記した曲面とすることに代えて、例えば、支持部２ａの形状を錐形とし、その傾斜面に通気膜４を固着することによっても、水はけ性を向上させることができる。 Moreover, as shown in FIG.2 (b), the surface of the support part 2a coat | covered with the ventilation film 4 is a curved surface. As described above, the ventilation member whose surface of the support portion 2a is a curved surface whose peripheral portion is lower than the central portion is improved in drainage. Therefore, the ventilation of the casing used in an environment that is easily affected by water. It is suitable as a member. In addition, instead of making the surface of the support portion 2a a curved surface as described above, for example, the shape of the support portion 2a is a conical shape, and the air permeable membrane 4 is fixed to the inclined surface to improve drainage. Can do.

貫通孔３の大きさは、通気部材１が固定される筐体の種類および通気膜４の透気量とを考慮して適宜決定すればよいが、その面積（気体の透過方向に対して直交する面の面積）を０．００１〜１００ｃｍ²とするとよい。 The size of the through-hole 3 may be appropriately determined in consideration of the type of the housing to which the ventilation member 1 is fixed and the air permeability of the gas permeable membrane 4, but its area (perpendicular to the gas transmission direction). The area of the surface to be performed) is preferably 0.001 to 100 cm ² .

また、図２（ｂ）に示したように、貫通孔３は、通気膜４によって被覆される面において複数に分れている。このように、通気膜４により被覆される面において複数の貫通孔３が形成されていると、通気膜４の中央も支持部２ａによって支持されるので、外力による通気膜４の破損を抑制できる。 Further, as shown in FIG. 2B, the through hole 3 is divided into a plurality on the surface covered with the gas permeable membrane 4. In this way, when the plurality of through holes 3 are formed on the surface covered with the gas permeable membrane 4, the center of the gas permeable membrane 4 is also supported by the support portion 2a, so that damage to the gas permeable membrane 4 due to external force can be suppressed. .

図３に示すように、通気膜４により被覆される面において一つの貫通孔３が形成されていてもよい。通気膜４により被覆される面において貫通孔３の径が大きいと、通気部材１の通気性を高めることができる。また、径が大きく、その径が貫通孔の長さ方向に一定であると、貫通孔を囲う支持体２の壁面に結露が生じて通気性が阻害されることを抑制できる。しかしながら、貫通孔３の径が大きいと、複数の通気部材を１つの箱に梱包して輸送等する際に、通気部材の脚部２ｈにより他の通気部材の通気膜４を破損するおそれがある。 As shown in FIG. 3, one through hole 3 may be formed on the surface covered with the gas permeable membrane 4. When the diameter of the through hole 3 is large on the surface covered with the gas permeable membrane 4, the air permeability of the gas permeable member 1 can be improved. Further, when the diameter is large and the diameter is constant in the length direction of the through hole, it is possible to suppress the occurrence of condensation on the wall surface of the support 2 surrounding the through hole and impairing the air permeability. However, if the diameter of the through-hole 3 is large, there is a possibility that the ventilation film 4 of the other ventilation member may be damaged by the leg 2h of the ventilation member when the plurality of ventilation members are packed and transported in one box. .

図４（ａ）および（ｂ）に、通気部材Ｘの１つの脚部２ｈが、通気部材Ｙの貫通孔３に挿入された状態を示している。図４（ａ）および（ｂ）では、通気部材Ｘについては支持部２ａ側から、通気部材Ｙについては挿入部２ｂ側から気体の透過方向に沿って平面視しており、通気部材Ｘの通気膜は省略している。通気部材Ｙを挿入部２ｂ側から気体の透過方向にそって平面視したときに見える支持体（図４においては支持部２ａ）は、リング形状をしている。 4A and 4B show a state where one leg 2h of the ventilation member X is inserted into the through hole 3 of the ventilation member Y. FIG. 4A and 4B, the ventilation member X is viewed in plan along the gas permeation direction from the support portion 2a side and the ventilation member Y is viewed from the insertion portion 2b side. The membrane is omitted. The support body (the support portion 2a in FIG. 4) that is visible when the ventilation member Y is viewed in plan along the gas permeation direction from the insertion portion 2b side has a ring shape.

図４（ａ）に示すように、Ａ寸法がＢ寸法より小さいと、通気部材Ｘの脚部２ｈは、通気部材Ｙの貫通孔３へ深く入り込むことができ、通気部材Ｘの脚部２ｈによって、通気部材Ｙの通気膜が破損するおそれがある。ここで、Ａ寸法とは、リング幅の最小値（最小リング幅）のことであり、Ｂ寸法とは、挿入部２ｂの挿入開始側端部において、挿入部２ｂが複数に分割されて形成された複数の脚部２ｈのうち、隣り合う２つの脚部間の最短距離が最も大きい脚部間の最短距離（最大脚部間距離）のことである。 As shown in FIG. 4A, when the dimension A is smaller than the dimension B, the leg 2h of the ventilation member X can penetrate deeply into the through hole 3 of the ventilation member Y, and the leg 2h of the ventilation member X There is a possibility that the ventilation film of the ventilation member Y is damaged. Here, the dimension A is the minimum ring width (minimum ring width), and the dimension B is formed by dividing the insertion portion 2b into a plurality at the insertion start side end of the insertion portion 2b. Among the plurality of leg portions 2h, the shortest distance between the leg portions having the largest shortest distance between two adjacent leg portions (maximum distance between the leg portions).

図４（ａ）に示した例のように、気体の透過方向にそって平面視したときに、支持部２ａの外形および貫通孔３がともに真円であり、支持部２ａの外形と貫通孔３の中心が同一である形態では、リング幅はいずれの箇所においても同じであり、上記リング幅をＡ寸法とする。また、図４（ａ）に示した例のように、複数の脚部２ｈが、いずれも同一形状をしており、挿入部２ｂの周方向に沿って等間隔に配置された形態では、挿入部２ｂの挿入開始側端部において、複数の脚部２ｈのうち、隣り合う２つの脚部間の最短距離は、いずれの脚部間においても等しく、上記最短距離をＢ寸法とする。 As in the example shown in FIG. 4A, when viewed in plan along the gas permeation direction, the outer shape of the support portion 2a and the through hole 3 are both perfect circles, and the outer shape and the through hole of the support portion 2a. In the form in which the centers of 3 are the same, the ring width is the same at any location, and the ring width is the A dimension. Further, as in the example shown in FIG. 4 (a), the plurality of leg portions 2h have the same shape and are inserted at equal intervals along the circumferential direction of the insertion portion 2b. At the insertion start side end of the portion 2b, the shortest distance between two adjacent leg portions among the plurality of leg portions 2h is equal between any of the leg portions, and the shortest distance is defined as a B dimension.

図４（ｂ）に示すように、Ａ寸法をＢ寸法より大きくすれば、通気部材Ｘの脚部２ｈが通気部材Ｙの貫通孔３に深く入り込もうとしても、通気部材Ｘの支持部２ａが通気部材Ｙの脚部２ｈにあたり、通気部材Ｘの脚部２ｈが通気部材Ｙの貫通孔３に深く入り込むことを妨げることができる。したがって、通気部材の脚部２ｈによる他の通気部材の通気膜４の破損や、通気部材の脚部２ｈが他の通気部材の脚部２ｈと絡み合うことを抑制でき、取り扱い易くなる。 As shown in FIG. 4 (b), if the A dimension is made larger than the B dimension, even if the leg 2h of the ventilation member X tries to penetrate deeply into the through hole 3 of the ventilation member Y, the support 2a of the ventilation member X is When hitting the leg 2h of the ventilation member Y, the leg 2h of the ventilation member X can be prevented from entering the through hole 3 of the ventilation member Y deeply. Therefore, it is possible to suppress breakage of the gas permeable membrane 4 of the other ventilation member by the leg portion 2h of the ventilation member and the entanglement of the leg portion 2h of the ventilation member with the leg portion 2h of the other ventilation member, which makes it easy to handle.

支持体２の材料としては、特に限定されないが、成形が容易な熱可塑性樹脂が好ましく、エラストマー以外の熱可塑性樹脂、例えば、ポリブチレンテレフタレート（ＰＢＴ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリフェニレンサルファイド（ＰＰＳ）、ポリサルフォン（ＰＳ）、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）、ＡＢＳ樹脂などまたはこれらの複合材が用いられる。上記した熱可塑性樹脂の他に、熱可塑性樹脂にガラス繊維、炭素繊維などの強化材や金属などを複合し、耐熱性、耐湿性、寸法安定性、剛性などが向上した複合材料を用いることもできる。また、通気部材１は圧入嵌合することにより筐体に固定されるため、耐衝撃性に優れ、曲げ強さの大きい材料、例えば、ＰＢＴ、ＰＰＳ、ＰＳなどを用いることが好ましい。特に、ＰＢＴの場合、ガラス繊維が５〜４０重量％含まれていることが好ましい。上記の材料から形成された支持体２は、その表面に、離型処置、易接着処理、絶縁処理、半導電処理、導電処理等を施してもよい。 The material of the support 2 is not particularly limited, but is preferably a thermoplastic resin that can be easily molded. Thermoplastic resins other than elastomers such as polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS) Polysulfone (PS), polypropylene (PP), polyethylene (PE), ABS resin, or a composite material thereof is used. In addition to the above-mentioned thermoplastic resin, it is also possible to use a composite material in which a reinforcing material such as glass fiber or carbon fiber or a metal is combined with the thermoplastic resin, and heat resistance, moisture resistance, dimensional stability, rigidity, etc. are improved. it can. Further, since the ventilation member 1 is fixed to the housing by press-fitting, it is preferable to use a material having excellent impact resistance and high bending strength, such as PBT, PPS, PS, or the like. In particular, in the case of PBT, it is preferable that 5 to 40% by weight of glass fiber is contained. The support 2 formed from the above materials may be subjected to a release treatment, an easy adhesion treatment, an insulation treatment, a semiconductive treatment, a conductive treatment, or the like on the surface thereof.

支持体２の成形方法は、特に限定されるものではなく、例えば射出成形、圧縮成形または切削などが挙げられる。 The molding method of the support 2 is not particularly limited, and examples thereof include injection molding, compression molding, and cutting.

通気膜４の材料、構造、形態は、十分な透気量が確保できるものであれば特に限定されないが、フッ素樹脂多孔体およびポリオレフィン多孔体から選ばれる少なくとも１種が好ましい。フッ素樹脂としては、ポリテトラフルオロエチレン（ＰＴＦＥ）、ポリクロロトリフルオロエチレン、テトラフルオロエチレン−ヘキサフルオロプロピレン共重合体、テトラフルオロエチレン−パーフルオロアルキルビニルエーテル共重合体、テトラフルオロエチレン−エチレン共重合体などが挙げられる。ポリオレフィンのモノマーとしては、エチレン、プロピレン、４−メチルペンテン−１、１−ブテンなどが挙げられ、これらのモノマーを単体で重合したりまたは共重合して得たポリオレフィンを用いることができる。また、上記したポリオレフィンを２種類以上ブレンドしたものであってもよいし、層構造としたものであってもよい。なかでも、小面積でも通気性が維持でき、筐体内部への水や塵の侵入を阻止する機能が高いＰＴＦＥ多孔体が特に好ましい。 The material, structure, and form of the gas permeable membrane 4 are not particularly limited as long as a sufficient amount of air permeability can be secured, but at least one selected from a fluororesin porous body and a polyolefin porous body is preferable. As fluororesin, polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-ethylene copolymer Etc. Examples of the polyolefin monomer include ethylene, propylene, 4-methylpentene-1, 1-butene, and the like, and a polyolefin obtained by polymerizing or copolymerizing these monomers alone can be used. Moreover, what blended two or more types of above-mentioned polyolefin may be used, and what was made into the layer structure may be sufficient. Among them, a PTFE porous body that can maintain air permeability even in a small area and has a high function of preventing water and dust from entering the inside of the housing is particularly preferable.

図１〜図３に示したように、通気膜４に補強材５を積層することもできる。このように、通気膜４の片面に補強材５を積層する場合、図１〜図３おいて通気膜４の補強材５が積層された面の反対面に補強材５を積層してもよい。補強材５の材料、構造、形態は、特に限定されないが、通気膜４よりも孔径が大きく通気性に優れた材料、例えば、織布、不織布、メッシュ、ネット、スポンジ、フォーム、金属多孔体、金属メッシュなどが好適である。耐熱性が要求される場合は、ポリエステル、ポリアミド、アラミド樹脂、ポリイミド、フッ素樹脂、超高分子量ポリエチレン、金属などからなる補強材が好ましい。尚、図１〜図３に示した例では、補強材５は通気膜４の片面に積層されているが、通気膜４の両面に積層してもよい。補強材５の両面に通気膜４を積層してもよい。 As shown in FIGS. 1 to 3, the reinforcing material 5 can be laminated on the gas permeable membrane 4. Thus, when laminating the reinforcing material 5 on one side of the gas permeable membrane 4, the reinforcing material 5 may be laminated on the opposite side of the surface of the gas permeable membrane 4 on which the reinforcing material 5 is laminated in FIGS. . The material, structure, and form of the reinforcing material 5 are not particularly limited, but a material having a larger pore diameter and superior air permeability than the gas permeable membrane 4, such as a woven fabric, a non-woven fabric, a mesh, a net, a sponge, a foam, a porous metal body, A metal mesh or the like is preferable. When heat resistance is required, a reinforcing material made of polyester, polyamide, aramid resin, polyimide, fluororesin, ultrahigh molecular weight polyethylene, metal or the like is preferable. In the example shown in FIGS. 1 to 3, the reinforcing material 5 is laminated on one side of the gas permeable membrane 4, but may be laminated on both sides of the gas permeable membrane 4. The gas permeable membrane 4 may be laminated on both surfaces of the reinforcing material 5.

通気膜４と補強材５を積層する方法は、単に重ねあわせるだけでもよく、互いに接合してもよい。接合は、例えば、接着剤ラミネート、熱ラミネート、加熱溶着、超音波溶着、接着剤による接着などの方法により行うことができる。例えば、熱ラミネートにより積層する場合は、加熱により補強材５の一部を溶融し接着すればよい。このように接着剤を用いずに接着すると、余分な重量増加がなく、通気性の低下も抑えることができる。また、ホットメルトパウダーのような融着剤を介在させて接着してもよい。 The method of laminating the gas permeable membrane 4 and the reinforcing material 5 may be simply overlapping or joining each other. Joining can be performed by methods such as adhesive lamination, thermal lamination, heat welding, ultrasonic welding, and adhesion using an adhesive. For example, when laminating by thermal lamination, a part of the reinforcing material 5 may be melted and bonded by heating. Thus, when it adheres without using an adhesive agent, there is no excess weight increase and it can also suppress the fall of air permeability. Moreover, you may adhere | attach by interposing a fusing agent like hot melt powder.

通気膜４と補強材５とが積層された積層体の通気度（ガーレ値）は、０．１〜３００ｓｅｃ／１００ｃｍ³であることが好ましく、さらには、１．０〜１００ｓｅｃ／１００ｃｍ³であることが好ましい。また、耐水圧は、１．０ｋＰａ以上であることが好ましい。 Breathable film 4 and the reinforcing member 5 and the air permeability of the laminate are laminated (Gurley value) is preferably 0.1~300sec / 100cm ^3, further, is 1.0~100sec / 100cm ³ It is preferable. The water pressure resistance is preferably 1.0 kPa or more.

筐体の用途に応じて、通気膜４に撥水処理、撥油処理などの撥液処理を施してもよい。撥液処理は、表面張力の小さな物質を通気膜４に塗布し、乾燥後、キュアすることにより行うことができ、撥液剤としては、通気膜よりも低い表面張力の被膜を形成できれば特に限定されないが、パーフルオロアルキル基を有する高分子が好適である。このような高分子としては、例えば、フロラード（住友スリーエム製）、スコッチガード（住友スリーエム製）、テックスガード（ダイキン工業製）、ユニダイン（ダイキン工業製）、アサヒガード（旭硝子製）など（すべて商品名）を利用してもよい。撥液剤の塗布は、含浸、スプレーなどにより行えばよい。 Depending on the use of the housing, the air-permeable membrane 4 may be subjected to liquid repellent treatment such as water repellent treatment and oil repellent treatment. The liquid repellent treatment can be performed by applying a substance having a small surface tension to the gas permeable film 4, drying and curing, and the liquid repellant is not particularly limited as long as a film having a surface tension lower than that of the gas permeable film can be formed. However, a polymer having a perfluoroalkyl group is preferred. Such polymers include, for example, Florard (manufactured by Sumitomo 3M), Scotchguard (manufactured by Sumitomo 3M), Texguard (manufactured by Daikin Industries), Unidyne (manufactured by Daikin Industries), Asahi Guard (manufactured by Asahi Glass) (all products) Name) may be used. The liquid repellent may be applied by impregnation or spraying.

通気膜４を支持部２ａに支持させる方法は、剥がれや浮きなどが生じにくい方法として、加熱溶着、超音波溶着、接着剤や粘着剤による接着などの方法が適している。簡便性という点から、加熱溶着または超音波溶着が好適である。通気膜４に補強材５を積層する場合は、特に限定されないが、補強材５を支持体２ａと固着すればよい。尚、高い撥液性が要求される場合には、撥液性が高い面を筐体の外側に向けて固着することが好ましい。 As a method for supporting the gas permeable membrane 4 on the support portion 2a, methods such as heat welding, ultrasonic welding, and adhesion using an adhesive or a pressure-sensitive adhesive are suitable as methods that do not easily cause peeling or floating. From the viewpoint of simplicity, heat welding or ultrasonic welding is preferable. When the reinforcing material 5 is laminated on the gas permeable membrane 4, there is no particular limitation, but the reinforcing material 5 may be fixed to the support 2a. When high liquid repellency is required, it is preferable to fix the surface having high liquid repellency to the outside of the housing.

通気膜４を支持部２ａへ支持させる他の方法として、支持体２を射出成形するに際して、支持体２を成形する金型内に通気膜４を配置し、通気膜４と支持体２とを一体化してもよい。 As another method of supporting the gas permeable membrane 4 to the support portion 2a, when the support 2 is injection-molded, the gas permeable membrane 4 is disposed in a mold for molding the support 2, and the gas permeable membrane 4 and the support 2 are connected. It may be integrated.

通気膜４、または通気膜４と補強材５とが積層された積層体の厚さは１μｍ〜５ｍｍであることが好ましい。１μｍより薄いと破損し易く、５ｍｍより厚いと支持され辛くなるからである。 The thickness of the gas permeable membrane 4 or the laminate in which the gas permeable membrane 4 and the reinforcing material 5 are laminated is preferably 1 μm to 5 mm. This is because if it is thinner than 1 μm, it is easily damaged, and if it is thicker than 5 mm, it is difficult to be supported.

また、図５に示すように、支持部２ａの筐体７と向い合う面にシール部２ｄを設けることで、筐体７と通気部材１との密着性や気密性を高めることができる。特に、支持部２ａおよび挿入部２ｂがエラストマー以外の熱可塑性樹脂からなる場合に、シール部２ｄを形成して密閉性を高めることが好ましい。 Further, as shown in FIG. 5, by providing the seal portion 2 d on the surface of the support portion 2 a that faces the housing 7, it is possible to improve the adhesion and airtightness between the housing 7 and the ventilation member 1. In particular, when the support portion 2a and the insertion portion 2b are made of a thermoplastic resin other than an elastomer, it is preferable to form a seal portion 2d to improve the sealing performance.

シール部２ｄの材質は、ニトリルゴム（ＮＢＲ）、エチレンープロピレンゴム（ＥＰＭ、ＥＰＤＭ）、シリコーンゴム、フッ素ゴム、アクリルゴム、水素化ニトリルゴムなどのエラストマー類、発泡体、あるいは粘着層付き発泡体などが好ましい。 The material of the seal part 2d is an elastomer such as nitrile rubber (NBR), ethylene-propylene rubber (EPM, EPDM), silicone rubber, fluorine rubber, acrylic rubber, hydrogenated nitrile rubber, foam, or foam with adhesive layer. Etc. are preferable.

シール部２ｄは、例えば、上記した材料からなるＯリングなどを挿入部２ｂに外嵌して設けてもよいし、二色成形により支持部２ａの一方の面に形成してもよい。また、粘着層付き発泡体を、支持部２ａの筐体７と向い合う面に貼り付けてもよい。 For example, the seal portion 2d may be provided by externally fitting an O-ring made of the above-described material to the insertion portion 2b, or may be formed on one surface of the support portion 2a by two-color molding. Moreover, you may affix the foam with an adhesion layer on the surface which faces the housing | casing 7 of the support part 2a.

また、図６（ａ）および（ｂ）に示すように、支持体２が通気膜４の上方の少なくとも一部を覆う保護部２ｅを備えることで、外力によって通気膜４が損傷したり、砂、泥などが通気膜の表面に蓄積することで通気が阻害されるなどのおそれを低減できる。 In addition, as shown in FIGS. 6A and 6B, the support 2 includes the protective portion 2e that covers at least a part of the upper portion of the gas permeable membrane 4, so that the gas permeable membrane 4 is damaged by an external force or sand. In addition, accumulation of mud and the like on the surface of the gas permeable membrane can reduce the risk of airflow being hindered.

保護部２ｅの形状は、通気部材１の通気性を損なわない形状であれば特に限定されないが、図６に示した例のように、気体の透過方向に沿って観察したときに見えない位置、例えば、保護部２ｅの側面に複数の開口部２ｆを形成することが好ましい。但し、通気膜４を保護する効果が損なわれない程度であれば、保護部２ｅの上面２ｇにも開口部２ｆを形成してもよい。また、開口部２ｆは、保護部材２ｅの強度を維持し、物体の浸入を効果的に防止するなどの観点から小さな孔に分割して形成することが好ましい。 The shape of the protective part 2e is not particularly limited as long as it does not impair the air permeability of the ventilation member 1, but as in the example shown in FIG. 6, a position that is not visible when observed along the gas transmission direction, For example, it is preferable to form a plurality of openings 2f on the side surface of the protective part 2e. However, the opening 2f may also be formed in the upper surface 2g of the protective part 2e as long as the effect of protecting the gas permeable membrane 4 is not impaired. The opening 2f is preferably divided into small holes from the viewpoint of maintaining the strength of the protective member 2e and effectively preventing the intrusion of an object.

保護部２ｅの材料は、支持体２の他の部分と同様のものを用いることができる。保護部２ｅと支持体２の他の部分とを一体化させる方法は、特に限定されないが、加熱溶着、超音波溶着、振動溶着、接着剤による接着、嵌合、螺合などの方法により行うことができる。特に、コストが安く容易であることから、加熱溶着または超音波溶着、または嵌合が好適である。 As the material of the protective part 2e, the same material as the other parts of the support 2 can be used. The method for integrating the protective part 2e and the other part of the support 2 is not particularly limited, but is performed by a method such as heat welding, ultrasonic welding, vibration welding, adhesive bonding, fitting, and screwing. Can do. In particular, since the cost is low and easy, heat welding, ultrasonic welding, or fitting is preferable.

（実施の形態２）
本実施の形態では、本発明の通気部材の他の例を、図７および図８を用いて説明する。本実施の形態において、特に説明のない場合は、実施の形態１と同様とし、同一の部材については同一の符号を付し、その説明を省略する。 (Embodiment 2)
In the present embodiment, another example of the ventilation member of the present invention will be described with reference to FIGS. In the present embodiment, unless otherwise described, it is the same as in the first embodiment, the same members are denoted by the same reference numerals, and the description thereof is omitted.

図１および図２に示した通気部材では、挿入部２ｂが周方向に沿って３つに分割され、３つの脚部２ｈのいずれもが、挿入開始側端部に係止部２ｃを含んでいるが（図２（ｂ）参照）、本実施の形態の通気部材２１では、図７および図８に示すように、挿入部２ｂが周方向に沿って６つに分割され、６つの脚部２ｈのうち、３つの脚部２ｈが係止部２ｃを含んでいる。係止部２ｃを含む脚部２ｈと、係止部２ｃを含まない脚部２ｈは、周方向に沿って交互に配置されている。 In the ventilation member shown in FIGS. 1 and 2, the insertion portion 2b is divided into three along the circumferential direction, and each of the three leg portions 2h includes a locking portion 2c at the insertion start side end. However, in the ventilation member 21 according to the present embodiment, as shown in FIGS. 7 and 8, the insertion portion 2b is divided into six along the circumferential direction, and six leg portions are provided. Of 2h, three leg portions 2h include a locking portion 2c. The leg portions 2h including the locking portions 2c and the leg portions 2h not including the locking portions 2c are alternately arranged along the circumferential direction.

図１および図２に示した通気部材のように、複数の脚部２ｈのいずれもが係止部２ｃを含んでいる場合、挿入部２ｂの開口部８への挿入圧をさらに低減する方法として、脚部２ｈ間の幅を細くして（スリット２ｉの幅を大きくして）、脚部２ｈを内方へ撓み易くしたり、係止部２ｃの開口部８に対する摺動面積を小さくすることが考えられる（図１参照）。しかしながら、脚部２ｈの幅を細くすると、挿入された挿入部２ｂと開口部８とが接する面積が減少するため、挿入部２ｂが開口部８内で回転し易くなり、安定性が損なわれる。 As in the case of the ventilation member shown in FIGS. 1 and 2, when any of the plurality of leg portions 2 h includes the locking portion 2 c, as a method for further reducing the insertion pressure of the insertion portion 2 b into the opening portion 8. Further, by narrowing the width between the leg portions 2h (increasing the width of the slit 2i), the leg portion 2h can be easily bent inward, or the sliding area of the locking portion 2c with respect to the opening 8 can be reduced. (See FIG. 1). However, if the width of the leg portion 2h is reduced, the area where the inserted insertion portion 2b is in contact with the opening portion 8 is reduced, so that the insertion portion 2b is easily rotated in the opening portion 8 and the stability is impaired.

本実施の形態の通気部材２１では、挿入部２ｂが周方向に沿ってより多くに分割されており、係止部２ｃを含まない脚部２ｈを含むため、脚部２ｈが内方へ撓み易くなり、係止部２ｃの開口部８に対する摺動面積が小さくなって、挿入圧を低減できるとともに、開口部８に接触する挿入部２ｂの面積も確保でき、挿入後の位置ずれが抑制され、安定性を高めることができる。 In the ventilation member 21 of the present embodiment, the insertion portion 2b is more divided along the circumferential direction, and includes the leg portion 2h that does not include the locking portion 2c. Therefore, the leg portion 2h is easily bent inward. The sliding area with respect to the opening 8 of the locking part 2c is reduced, the insertion pressure can be reduced, the area of the insertion part 2b in contact with the opening 8 can be secured, and the displacement after insertion is suppressed, Stability can be increased.

本実施の形態では、図８（ａ）に示すように、保護部２ｅの突出部２ｊと、支持部２ａの筐体７と向い合う面に形成された溝部２ｋとが嵌合することにより、保護部２ｅと支持部ａとが一体化している。保護部２ｅを支持部ａから取り外すこともできるので、通気膜４を新しい通気膜４と交換することもできる。 In the present embodiment, as shown in FIG. 8A, the protrusion 2j of the protection part 2e and the groove 2k formed on the surface of the support 2a facing the housing 7 are fitted, The protection part 2e and the support part a are integrated. Since the protection part 2e can also be removed from the support part a, the gas permeable membrane 4 can be replaced with a new gas permeable membrane 4.

（実施の形態３）
本実施の形態では、本発明の通気部材の他の例を、図９〜図１１を用いて説明する。本実施の形態において、特に説明のない場合は、実施の形態１および実施の形態２と同様とし、同一の部材については同一の符号を付し、その説明を省略する。 (Embodiment 3)
In the present embodiment, another example of the ventilation member of the present invention will be described with reference to FIGS. In the present embodiment, unless otherwise described, the same members as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

実施の形態１および実施の形態２の通気部材では、２以上の脚部２ｈがテーパー状の係止部２ｃを含んでいるが（図２（ｂ）、図８（ｂ）参照）、本実施の形態の通気部材３１では、複数の脚部２ｈのいずれも上記係止部を含まない。挿入部２ｂの外径は、開口部８の径とほぼ同じであり、通気部材３１は、挿入部２ｂが開口部８へ圧入されることにより筐体７に固定される。 In the ventilation member according to the first and second embodiments, two or more legs 2h include a tapered locking portion 2c (see FIGS. 2B and 8B). In the ventilation member 31 of the form, none of the plurality of leg portions 2h includes the locking portion. The outer diameter of the insertion portion 2 b is substantially the same as the diameter of the opening portion 8, and the ventilation member 31 is fixed to the housing 7 when the insertion portion 2 b is press-fitted into the opening portion 8.

図１０に示すように、図９に示した通気部材３１には、筐体７内に突出した挿入部２ｂの挿入開始側の内部に、挿入部２ｂの挿入開始側を内側から押し広げる構造の抜け防止具９を装着することが望ましい。通気部材３１と抜け防止具９とからなる通気構造形成キットによれば、通気部材３１をより強固に筐体７に固定できる。 As shown in FIG. 10, the ventilation member 31 shown in FIG. 9 has a structure in which the insertion start side of the insertion portion 2b is pushed from the inside into the insertion start side of the insertion portion 2b protruding into the housing 7. It is desirable to attach the removal prevention tool 9. According to the ventilation structure forming kit including the ventilation member 31 and the removal prevention tool 9, the ventilation member 31 can be more firmly fixed to the housing 7.

抜け防止具９は、図１０および図１１に示すように、開口部８を突き抜けるように開口部８に挿入された挿入部２ｂに挿入されて、挿入部２ｂを内側から押し広げる柱状部９ａを含んでいる。柱状部９ａには、挿入部２ｂに挿入された状態で、通気部材の貫通孔３と連通する通気孔９ｂが形成されている。柱状部９ａの外径は、挿入開始側から挿入終止側へ向って大きくなっている。抜け防止具９は、柱状部９ａの挿入終止側に設けられ、筐体７の開口部８より大きい径を有する鍔部９ｃを含んでいるので、抜け防止具９が挿入部２ｂ内へ入り込み過ぎることを防止できる。 As shown in FIGS. 10 and 11, the removal prevention tool 9 is inserted into the insertion portion 2 b inserted into the opening 8 so as to penetrate through the opening 8, and has a columnar portion 9 a that spreads the insertion portion 2 b from the inside. Contains. The columnar portion 9a is formed with a vent hole 9b that communicates with the through hole 3 of the vent member while being inserted into the insertion portion 2b. The outer diameter of the columnar portion 9a increases from the insertion start side toward the insertion end side. The removal prevention tool 9 is provided on the insertion end side of the columnar part 9a and includes a flange 9c having a diameter larger than that of the opening 8 of the housing 7, so that the removal prevention tool 9 enters the insertion part 2b too much. Can be prevented.

抜け防止具９は、図１０および図１１に示すように、鍔部９ｃから柱状部９ａを囲うように形成された返り部９ｄをさらに含んでいてもよい。返り部９ｄと柱状部９ａとの間に脚部２ｈが嵌合するように返り部９ｄを形成すれば、抜け防止具９を通気部材３１に強固に装着できる。また、柱状部９ａが挿入部２ｂの内部に挿入された状態で、返り部９ｄの端面９ｅと、筐体７の支持部２ａと向かい合う面の反対面７ａとが当接するように返り部９ｄを形成すれば、挿入部２ｂが開口部８内を摺動しないように、通気部材３１を筐体７に固定できる。必要に応じて抜け防止具９を通気部材３１から取り外せば、通気部材３１を交換することができる。挿入部２ｂの内面および柱状部９ａの外面に、互いに螺合、嵌合する、雄ネジおよび雌ネジ、嵌合溝および嵌合突起等を設けてもよい。 As shown in FIGS. 10 and 11, the removal prevention tool 9 may further include a return portion 9 d formed so as to surround the columnar portion 9 a from the flange portion 9 c. If the return portion 9d is formed so that the leg portion 2h is fitted between the return portion 9d and the columnar portion 9a, the removal prevention tool 9 can be firmly attached to the ventilation member 31. Further, in a state where the columnar portion 9a is inserted into the insertion portion 2b, the return portion 9d is arranged so that the end surface 9e of the return portion 9d and the opposite surface 7a of the surface facing the support portion 2a of the housing 7 come into contact with each other. If formed, the ventilation member 31 can be fixed to the housing 7 so that the insertion portion 2 b does not slide in the opening 8. If the removal prevention tool 9 is removed from the ventilation member 31 as necessary, the ventilation member 31 can be replaced. A male screw and a female screw, a fitting groove, a fitting protrusion, and the like may be provided on the inner surface of the insertion portion 2b and the outer surface of the columnar portion 9a.

抜け防止具９の材料は、特に制限されず、支持体の材料と同様であってもよいが、熱可塑性エラストマーなどのゴム状弾性を有する材料であってもよい。 The material of the removal prevention tool 9 is not particularly limited and may be the same as the material of the support, but may be a material having rubbery elasticity such as a thermoplastic elastomer.

次に、図１２〜図１５に本発明の通気部材を固定した通気筐体の例を示す。図１２に示したコネクタには、図１に示した通気部材１が、図１３に示した自動車用ランプには、図６に示した通気部材１が、図１４に示した電動ハブラシには、図５に示した通気部材１が、図１５に示したＥＣＵには、図１に示した通気部材１が固定されている。しかしながら、本発明の通気部材が固定される筐体はこれらに限定されるものではない。また、筐体に固定される本発明の通気部材の個数についても特に限定されるものではなく、筐体の他の面や同じ面に複数個取り付けてもよい。 Next, FIGS. 12 to 15 show examples of a ventilation casing to which the ventilation member of the present invention is fixed. The connector shown in FIG. 12 has the ventilation member 1 shown in FIG. 1, the automobile lamp shown in FIG. 13, the ventilation member 1 shown in FIG. 6, and the electric toothbrush shown in FIG. The ventilation member 1 shown in FIG. 5 is fixed to the ECU shown in FIG. 15 in the ventilation member 1 shown in FIG. However, the housing to which the ventilation member of the present invention is fixed is not limited to these. Further, the number of the ventilation members of the present invention fixed to the housing is not particularly limited, and a plurality of ventilation members may be attached to the other surface or the same surface of the housing.

以下、本発明を実施例によりさらに詳細に説明するが、本発明は以下の実施例に制限されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not restrict | limited to a following example.

(実施例１)
実施例１として、図６に示す通気部材を下記の通り作製した。まず、ＰＢＴ（テイジン社製ＣＧ７６４０：融点２２５℃）を用いて、図６に示す構造の支持体２を射出成形により得た。得られた支持体２の支持部２ａの厚さは２．５ｍｍ、外径は１６ｍｍ、挿入部２ｂの外径（係止部２ｃが形成されていない箇所）は５．５ｍｍ、挿入部２ｂに設けられた貫通孔３の内径は３．５ｍｍであった。保護部２ｅの厚さは３．５ｍｍ、外径は１６ｍｍであった。 (Example 1)
As Example 1, the ventilation member shown in FIG. First, the support body 2 having the structure shown in FIG. 6 was obtained by injection molding using PBT (CG7640 manufactured by Teijin Co., Ltd., melting point 225 ° C.). The thickness of the support part 2a of the obtained support 2 is 2.5 mm, the outer diameter is 16 mm, the outer diameter of the insertion part 2b (the place where the locking part 2c is not formed) is 5.5 mm, and the insertion part 2b The inner diameter of the provided through hole 3 was 3.5 mm. The protective part 2e had a thickness of 3.5 mm and an outer diameter of 16 mm.

次に、通気膜４として、厚さ０．０８５ｍｍ、外径２０ｍｍのＰＴＦＥ多孔体（日東電工社製ミクロテックスＮＴＦ１１３１：融点３２７℃）を準備し、補強材５として、厚さ０．２ｍｍのポリエステル系不織布（東レ社製、アクスター：融点２３０℃）を準備した。通気膜４と補強材５とを、温度２６０℃、圧力５．０×１０⁵Ｐａで１０秒間圧着して加熱溶着し、積層体６を得た。 Next, a PTFE porous body (Nitto Denko Microtex NTF 1131: melting point 327 ° C.) having a thickness of 0.085 mm and an outer diameter of 20 mm is prepared as the gas permeable membrane 4, and the reinforcing material 5 is a polyester having a thickness of 0.2 mm. A non-woven fabric (manufactured by Toray Industries, Inc., Axter: melting point 230 ° C.) was prepared. The gas permeable membrane 4 and the reinforcing material 5 were pressure-bonded for 10 seconds at a temperature of 260 ° C. and a pressure of 5.0 × 10 ⁵ Pa, and heat-welded to obtain a laminate 6.

つづいて、積層体６を外径８ｍｍに打抜き、支持部２ａに設けられた貫通孔３を被覆するようにして積層体６の補強材５を支持部２ａに当接させ、温度２６０℃、圧力５．０×１０5Ｐａで３０秒間圧着して加熱溶着した。次に、保護部２ｅと支持部２ａとを加熱溶着により固着した。最後に、シール部２ｄとして、ＥＰＤＭ製のＯリングを挿入部２ｂに装着し、通気部材Ａを得た。 Subsequently, the laminated body 6 is punched to an outer diameter of 8 mm, and the reinforcing member 5 of the laminated body 6 is brought into contact with the support portion 2a so as to cover the through hole 3 provided in the support portion 2a. It was heat-welded by pressure bonding at 5.0 × 10 5 Pa for 30 seconds. Next, the protection part 2e and the support part 2a were fixed by heat welding. Finally, an EPDM O-ring was attached to the insertion portion 2b as the seal portion 2d to obtain a ventilation member A.

一方、通気部材Ａを固定するための筐体として、ＰＢＴ（テイジン社製ＣＧ７６４０：融点２２５℃）を用いて射出成形により作製した。得られた筐体７の外壁の厚さは２ｍｍ、開口部８の内径は６．５ｍｍであった。筐体７の開口部８に通気部材Ａを手で圧入し、通気筐体Ａを得た。 On the other hand, as a casing for fixing the ventilation member A, PBT (CG7640 manufactured by Teijin Co., Ltd .: melting point 225 ° C.) was used for injection molding. The thickness of the outer wall of the obtained casing 7 was 2 mm, and the inner diameter of the opening 8 was 6.5 mm. The ventilation member A was press-fitted by hand into the opening 8 of the casing 7 to obtain the ventilation casing A.

(実施例２)
実施例２として、図６に示す通気部材を下記の通り作製した。まず、ＰＰ（住友化学工業社製、ＡＷ５６４：融点１６５℃）を用いて、図６に示す構造の支持体２を射出成形により得た。得られた支持体２の支持部２ａの厚さは２．５ｍｍ、外径は１６ｍｍ、挿入部２ｂの外径（係止部２ｃが形成されていない箇所）は５．５ｍｍ、挿入部２ｂに設けられた貫通孔３の内径は３．５ｍｍであった。保護部２ｅの厚さは３．５ｍｍ、外径は１６ｍｍであった。 (Example 2)
As Example 2, the ventilation member shown in FIG. First, the support body 2 having the structure shown in FIG. 6 was obtained by injection molding using PP (manufactured by Sumitomo Chemical Co., Ltd., AW564: melting point 165 ° C.). The thickness of the support part 2a of the obtained support 2 is 2.5 mm, the outer diameter is 16 mm, the outer diameter of the insertion part 2b (the place where the locking part 2c is not formed) is 5.5 mm, and the insertion part 2b The inner diameter of the provided through hole 3 was 3.5 mm. The protective part 2e had a thickness of 3.5 mm and an outer diameter of 16 mm.

次に、通気膜４として、厚さ０．０２ｍｍ、外径２０ｍｍのＰＴＦＥ多孔体（日東電工社製ミクロテックスＮＴＦ１０２６：融点：３２７℃）を準備し、補強材５として、厚さ０．２ｍｍのポリエステル系不織布（東レ社製、アクスター：融点２３０℃）を準備した。通気膜４と補強材５とを、温度２６０℃、圧力５．０×１０⁵Ｐａで１０秒間圧着して加熱溶着し、積層体６を得た。 Next, a PTFE porous body (Nitto Denko Microtex NTF1026: melting point: 327 ° C.) having a thickness of 0.02 mm and an outer diameter of 20 mm was prepared as the gas permeable membrane 4, and a reinforcing material 5 having a thickness of 0.2 mm was prepared. A polyester-based non-woven fabric (manufactured by Toray Industries, Inc., Acster: melting point 230 ° C.) was prepared. The gas permeable membrane 4 and the reinforcing material 5 were pressure-bonded for 10 seconds at a temperature of 260 ° C. and a pressure of 5.0 × 10 ⁵ Pa, and heat-welded to obtain a laminate 6.

つづいて、積層体６を外径８ｍｍに打抜き、支持部２ａに設けられた貫通孔３を被覆するようにして積層体１２の補強材５を支持部２ａに当接させ、温度２６０℃、圧力５．０×１０5Ｐａで３０秒間圧着して加熱溶着した。次に、保護部２ｅと支持部２ａとを加熱溶着により固着した。最後に、シール部２ｄとして、ＮＢＲ製のＯリングを挿入部２ｂに装着し、通気部材Ｂを得た。実施例１で作製した筐体７の開口部８に通気部材Ｂを手で圧入し、通気筐体Ｂを得た。 Subsequently, the laminate 6 is punched to an outer diameter of 8 mm, and the reinforcing member 5 of the laminate 12 is brought into contact with the support portion 2a so as to cover the through hole 3 provided in the support portion 2a. It was heat-welded by pressure bonding at 5.0 × 10 5 Pa for 30 seconds. Next, the protection part 2e and the support part 2a were fixed by heat welding. Finally, an NBR O-ring was attached to the insertion portion 2b as the seal portion 2d, and a ventilation member B was obtained. The ventilation member B was press-fitted by hand into the opening 8 of the casing 7 produced in Example 1 to obtain the ventilation casing B.

（実施例３）
実施例３として、図７および図８に示す通気部材を下記の通り作製した。まず、ＰＢＴ（テイジン社製ＣＧ７６４０：融点２２５℃）を用いて、図７および図８に示す構造の支持体２を射出成形により得た。得られた支持体２の支持部２ａの厚さは３ｍｍ、最大外径は１６．５ｍｍ、挿入部２ｂの外径（係止部２ｃが形成されていない箇所）は１０ｍｍ、挿入部２ｂに設けられた貫通孔３の内径は８．５ｍｍ、Ａ寸法は４．２５ｍｍ、Ｂ寸法は２．１ｍｍであった。保護部２ｅの厚さは４．５ｍｍ、外径は１７ｍｍであった。 (Example 3)
As Example 3, the ventilation member shown in FIGS. 7 and 8 was produced as follows. First, the support 2 having the structure shown in FIGS. 7 and 8 was obtained by injection molding using PBT (CG7640 manufactured by Teijin Co., Ltd., melting point 225 ° C.). The thickness of the support portion 2a of the obtained support 2 is 3 mm, the maximum outer diameter is 16.5 mm, the outer diameter of the insertion portion 2b (the place where the locking portion 2c is not formed) is 10 mm, and the insertion portion 2b is provided. The inner diameter of the obtained through-hole 3 was 8.5 mm, the A dimension was 4.25 mm, and the B dimension was 2.1 mm. The protective part 2e had a thickness of 4.5 mm and an outer diameter of 17 mm.

次に、実施例２で作製した積層体６を外径１１ｍｍに打抜き、実施例２と同様にして支持部２ａに溶着した。次に、保護部２ｅと支持部２ａとを加熱溶着した。シール部２ｄとして、ＥＰＤＭ製のＯリングを挿入部２ｂに装着し、通気部材Ｃを得た。 Next, the laminate 6 produced in Example 2 was punched out to an outer diameter of 11 mm and welded to the support portion 2a in the same manner as in Example 2. Next, the protection part 2e and the support part 2a were heat-welded. As the seal portion 2d, an EPDM O-ring was attached to the insertion portion 2b, and a ventilation member C was obtained.

一方、通気部材Ｃを固定するための筐体を、ＰＢＴ（テイジン社製ＣＧ７６４０：融点２２５℃）を用いて射出成形により作製した。得られた筐体７の外壁の厚さは２ｍｍ、開口部８の内径は１０．４ｍｍであった。筐体７の開口部８に通気部材Ｃを手で圧入し、通気筐体Ｃを得た。 On the other hand, a housing for fixing the ventilation member C was produced by injection molding using PBT (CG7640 manufactured by Teijin Co., Ltd., melting point 225 ° C.). The thickness of the outer wall of the obtained casing 7 was 2 mm, and the inner diameter of the opening 8 was 10.4 mm. The ventilation member C was press-fitted into the opening 8 of the casing 7 by hand to obtain the ventilation casing C.

（実施例４）
実施例４として、図７および図８に示す通気部材を下記の通り作製した。まず、ＰＰ（住友化学工業社製、ＡＷ５６４：融点１６５℃）を用いて、図７および図８に示す構造の支持体２を射出成形により得た。得られた支持体２の支持部２ａの厚さは３ｍｍ、最大外径は１６．５ｍｍ、挿入部２ｂの外径（係止部２ｃが形成されていない箇所）は１０ｍｍ、挿入部２ｂに設けられた貫通孔３の内径は８．５ｍｍ、Ａ寸法は４．２５ｍｍ、Ｂ寸法は２．１ｍｍであった。保護部２ｅの厚さは４．５ｍｍ、外径は１７ｍｍであった。 Example 4
As Example 4, the ventilation member shown in FIGS. 7 and 8 was produced as follows. First, the support body 2 having the structure shown in FIGS. 7 and 8 was obtained by injection molding using PP (manufactured by Sumitomo Chemical Co., Ltd., AW564: melting point 165 ° C.). The thickness of the support portion 2a of the obtained support 2 is 3 mm, the maximum outer diameter is 16.5 mm, the outer diameter of the insertion portion 2b (the place where the locking portion 2c is not formed) is 10 mm, and the insertion portion 2b is provided. The inner diameter of the obtained through-hole 3 was 8.5 mm, the A dimension was 4.25 mm, and the B dimension was 2.1 mm. The protective part 2e had a thickness of 4.5 mm and an outer diameter of 17 mm.

次に、実施例１で作製した積層体６を外径１１ｍｍに打抜き、実施例１と同様にして支持部２ａに溶着した。次に、保護部２ｅと支持部２ａとを加熱溶着した。シール部２ｄとして、シリコーンゴム製のＯリングを挿入部２ｂに装着し、通気部材Ｄを得た。実施例３で作製した筐体７の開口部８に通気部材Ｄを手で圧入し、通気筐体Ｄを得た。 Next, the laminate 6 produced in Example 1 was punched out to an outer diameter of 11 mm and welded to the support portion 2a in the same manner as in Example 1. Next, the protection part 2e and the support part 2a were heat-welded. As the seal portion 2d, a silicone rubber O-ring was attached to the insertion portion 2b to obtain a ventilation member D. The ventilation member D was press-fitted by hand into the opening 8 of the casing 7 produced in Example 3 to obtain the ventilation casing D.

（実施例５）
実施例５として、図９に示す通気部材を下記の通り作製した。まず、ＰＢＴ（テイジン社製ＣＧ７６４０：融点２２５℃）を用いて、図９に示す構造の支持体２を射出成形により得た。得られた支持体２の支持部２ａの厚さは３ｍｍ、最大外径は１６．５ｍｍ、挿入部２ｂの外径は１０ｍｍ、挿入部２ｂに設けられた貫通孔３の内径は８．５ｍｍ、Ａ寸法は４．２５ｍｍ、Ｂ寸法は２．１ｍｍであった。保護部２ｅの厚さは４．５ｍｍ、外径は１７ｍｍであった。 (Example 5)
As Example 5, the ventilation member shown in FIG. 9 was produced as follows. First, the support 2 having the structure shown in FIG. 9 was obtained by injection molding using PBT (CG7640 manufactured by Teijin Co., Ltd., melting point 225 ° C.). The thickness of the support portion 2a of the obtained support 2 is 3 mm, the maximum outer diameter is 16.5 mm, the outer diameter of the insertion portion 2b is 10 mm, the inner diameter of the through hole 3 provided in the insertion portion 2b is 8.5 mm, The A dimension was 4.25 mm, and the B dimension was 2.1 mm. The protective part 2e had a thickness of 4.5 mm and an outer diameter of 17 mm.

次に、実施例１で作製した積層体６を外径１１ｍｍに打抜き、実施例１と同様にして支持部２ａに溶着した。次に、保護部２ｅと支持部２ａとを加熱溶着した。シール部２ｄとして、粘着層付きＥＰＤＭ系発泡シート（日東電工（株）製、シールセイバー、ＳＡ−６１２、厚さ４ｍｍ）を外径１５ｍｍ、内径１０．５ｍｍのドーナツ状に打ち抜いたものを、支持部２ａの筐体と向い合う面に貼り付け、通気部材Ｅを得た。 Next, the laminate 6 produced in Example 1 was punched out to an outer diameter of 11 mm and welded to the support portion 2a in the same manner as in Example 1. Next, the protection part 2e and the support part 2a were heat-welded. As the seal part 2d, an EPDM foam sheet with an adhesive layer (manufactured by Nitto Denko Corporation, seal saver, SA-612, thickness 4 mm) punched into a donut shape having an outer diameter of 15 mm and an inner diameter of 10.5 mm is supported. The ventilation member E was obtained by pasting on the surface of the part 2a facing the housing.

次に、ＰＢＴ（テイジン社製ＣＧ７６４０：融点２２５℃）を用いて、図１１に示す構造の通気部材の抜け防止具９を射出形成により作製した。得られた抜け防止具９の通気孔９ｂの径は４ｍｍ、柱状部９ａの最少外径は８ｍｍ、柱状部９ａの最大外径は９ｍｍ、柱状部９ａの長さ（外径が最少である箇所から最大である箇所までの長さ）は４．０ｍｍであった。 Next, using a PBT (CG7640 manufactured by Teijin Co., Ltd., melting point 225 ° C.), a vent member escape prevention tool 9 having the structure shown in FIG. 11 was produced by injection molding. The diameter of the ventilation hole 9b of the obtained removal prevention tool 9 is 4 mm, the minimum outer diameter of the columnar part 9a is 8 mm, the maximum outer diameter of the columnar part 9a is 9 mm, and the length of the columnar part 9a (the place where the outer diameter is the smallest) To the maximum point) was 4.0 mm.

実施例３で作製した筐体７の開口部８に通気部材Ｅを挿入し、開口部８へ挿入された挿入部２ｂに上記抜け防止具９を挿入して、通気筐体Ｅを得た。 The ventilation member E was inserted into the opening 8 of the housing 7 manufactured in Example 3, and the above-described removal prevention tool 9 was inserted into the insertion portion 2 b inserted into the opening 8 to obtain the ventilation housing E.

（比較例１）
図１７（ａ）に示した通気部材５１を、スチレンーブタジエンゴムを主成分とする材料（旭化成社製、タフデン１０００、曲げ弾性率４．０×１０⁸Ｎ／ｍ²）を用いて、成形および熱加硫により作製した。得られた通気部材Ｆの内径は７．５ｍｍ、外径は１１．５ｍｍ、肉厚は２ｍｍ、高さＨは４０ｍｍであった。 (Comparative Example 1)
The ventilation member 51 shown in FIG. 17A is molded using a material mainly composed of styrene-butadiene rubber (Asahi Kasei Co., Ltd., Toughden 1000, flexural modulus 4.0 × 10 ⁸ N / m ² ). And produced by thermal vulcanization. The obtained ventilation member F had an inner diameter of 7.5 mm, an outer diameter of 11.5 mm, a wall thickness of 2 mm, and a height H of 40 mm.

一方、通気部材Ｆを取り付ける筐体として、図１７（ａ）に示した筐体５０を射出成形によって作製した。首部５０ａは中空円柱状であり、首部の外径を通気部材５１の内径よりも２０％大きく形成した。通気部材Ｆの一端を上記首部５０ａに８ｍｍ外嵌して、通気筐体Ｆを得た。 On the other hand, as a case to which the ventilation member F is attached, the case 50 shown in FIG. 17A is manufactured by injection molding. The neck portion 50 a has a hollow cylindrical shape, and the outer diameter of the neck portion is formed to be 20% larger than the inner diameter of the ventilation member 51. One end of the ventilation member F was externally fitted to the neck portion 50a by 8 mm to obtain a ventilation casing F.

（比較例２）
図１８に示したカバー部品６１をＰＰ（宇部興産社製ＵＢＥポリプロＪ８１５ＨＫ：曲げ弾性率１．４７×１０⁹Ｎ／ｍ²）を用い、略筒状体６２を熱可塑性エラストマー（三井化学社製ミラストマー６０３０：曲げ弾性率４．４１×１０⁸Ｎ／ｍ²）を用いて、それぞれ射出成形により作製した。得られたカバー部品６１の外径は１７．５ｍｍ、内径は１５．５ｍｍ、得られた略筒状体６２の最大外径は１５．５ｍｍ、頂部開口部６２ａの内径は７．５ｍｍであった。 (Comparative Example 2)
The cover part 61 shown in FIG. 18 is made of PP (UBE Polypro J815HK manufactured by Ube Industries, Ltd .: flexural modulus 1.47 × 10 ⁹ N / m ² ), and the substantially cylindrical body 62 is made of a thermoplastic elastomer (manufactured by Mitsui Chemicals, Inc.). Each was produced by injection molding using a Miralastomer 6030: flexural modulus 4.41 × 10 ⁸ N / m ² ). The outer diameter of the obtained cover part 61 was 17.5 mm, the inner diameter was 15.5 mm, the maximum outer diameter of the obtained substantially cylindrical body 62 was 15.5 mm, and the inner diameter of the top opening 62 a was 7.5 mm. .

また、通気フィルタ６３として、ＰＴＦＥ多孔体（日東電工社製ミクロテックスＮＴＦ１０２６：厚さ０．０２μｍ、平均孔径０．６μｍ、気孔率８０％）を準備した。ついで、上記略筒状体６２の底部に上記通気フィルタ６３を当接させた後、温度１５０℃、圧力１０×１０⁴Ｐａで１０秒圧着して加熱溶着した。上部カバー部品６１に略円筒体６２を嵌装して、通気部材Ｇを得た。 Further, a PTFE porous body (Microtex NTF1026 manufactured by Nitto Denko Corporation: thickness 0.02 μm, average pore diameter 0.6 μm, porosity 80%) was prepared as the ventilation filter 63. Next, the ventilation filter 63 was brought into contact with the bottom of the substantially cylindrical body 62, and then heat-welded by pressure bonding at a temperature of 150 ° C. and a pressure of 10 × 10 ⁴ Pa for 10 seconds. A substantially cylindrical body 62 was fitted to the upper cover part 61 to obtain a ventilation member G.

一方、通気部材Ｇを取り付ける筐体として、図１８（ｂ）に示した筐体５０を射出成形によって作製した。首部５０ａは中空円柱状であり、首部の外径を頂部開口部６２ａの内径よりも２０％大きく形成した。上記首部５０ａに通気部材Ｇを８ｍｍ外嵌して、通気筐体Ｇを得た。 On the other hand, as a casing to which the ventilation member G is attached, the casing 50 shown in FIG. 18B was produced by injection molding. The neck 50a has a hollow cylindrical shape, and the outer diameter of the neck is formed to be 20% larger than the inner diameter of the top opening 62a. A ventilation member G was fitted on the neck 50a by 8 mm to obtain a ventilation casing G.

（比較例３）
比較例３として、図１６に示す通気部材を下記の通り作製した。まず、ＰＢＴ（テイジン社製ＣＧ７６４０：融点２２５℃）を用いて、図１６に示す構造の支持体を射出成形により得た。得られた支持体の支持部２ａの厚さは３ｍｍ、最大外径は１６．５ｍｍ、挿入部２ｂの外径（係止部２ｃが形成されていない箇所）は１０ｍｍ、挿入部２ｂに設けられた貫通孔３の内径は８．５ｍｍ、Ａ寸法は４．２５ｍｍ、Ｂ寸法は６．２ｍｍであった。保護部２ｅの厚さは４．５ｍｍ、外径は１７ｍｍであった。 (Comparative Example 3)
As Comparative Example 3, the ventilation member shown in FIG. First, a support having the structure shown in FIG. 16 was obtained by injection molding using PBT (CG7640 manufactured by Teijin Co., Ltd., melting point 225 ° C.). The thickness of the support portion 2a of the obtained support is 3 mm, the maximum outer diameter is 16.5 mm, the outer diameter of the insertion portion 2b (the place where the locking portion 2c is not formed) is 10 mm, and the insertion portion 2b is provided. The through hole 3 had an inner diameter of 8.5 mm, an A dimension of 4.25 mm, and a B dimension of 6.2 mm. The protective part 2e had a thickness of 4.5 mm and an outer diameter of 17 mm.

次に、実施例１で作製した積層体６を外径１１ｍｍに打抜き、実施例１と同様にして支持部２ａに溶着した。次に、保護部２ｅと支持部２ａとを加熱溶着により固着した。シール部２ｄとして、粘着層付きＥＰＤＭ系発泡シート（日東電工（株）製、シールセイバー、ＳＡ−６１２、厚さ４ｍｍ）を外径１５ｍｍ、内径１０．５ｍｍのドーナツ状に打ち抜いたものを、支持部２ａの筐体と向い合う面に貼り付け、通気部材Ｈを得た。実施例３で作製した筐体７の開口部８に通気部材Ｈを手で圧入し、通気筐体Ｈを得た。 Next, the laminate 6 produced in Example 1 was punched out to an outer diameter of 11 mm and welded to the support portion 2a in the same manner as in Example 1. Next, the protection part 2e and the support part 2a were fixed by heat welding. As the seal part 2d, an EPDM foam sheet with an adhesive layer (manufactured by Nitto Denko Corporation, seal saver, SA-612, thickness 4 mm) punched into a donut shape having an outer diameter of 15 mm and an inner diameter of 10.5 mm is supported. The ventilation member H was obtained by pasting on the surface of the part 2a facing the housing. The ventilation member H was press-fitted by hand into the opening 8 of the casing 7 produced in Example 3, and the ventilation casing H was obtained.

このようにして得られた通気筐体Ａ〜Ｈについて、引き抜き力の測定を下記の方法にしたがって行った。その結果、通気部材Ａ〜Ｅ（実施例１〜実施例５）および通気部材Ｈ（比較例３）については引き抜くことができなかった。通気部材Ｆ（比較例１）の引抜き力は７．５Ｎ、通気部材Ｇ（比較例２）の引抜き力は１９．０Ｎであった。 With respect to the ventilation casings A to H thus obtained, the pulling force was measured according to the following method. As a result, the ventilation members A to E (Examples 1 to 5) and the ventilation member H (Comparative Example 3) could not be pulled out. The drawing force of the ventilation member F (Comparative Example 1) was 7.5 N, and the drawing force of the ventilation member G (Comparative Example 2) was 19.0 N.

上記「引抜き試験」では、通気部材を、引張速度８．３３×１０^-4ｍ／ｓの条件で、筐体から引き抜く方向に引っ張り、そのときの最大値を引抜き力とした。ただし、引抜き力が３０Ｎ以上の場合は引抜き不可と判断した。 In the “pullout test”, the ventilation member was pulled in the direction of pulling out from the housing under the condition of a tensile speed of 8.33 × 10 ⁻⁴ m / s, and the maximum value at that time was defined as the pulling force. However, when the drawing force was 30 N or more, it was determined that the drawing was not possible.

また、通気部材Ｃ〜Ｅ（実施例３〜５）、および通気部材Ｈ（比較例３）について、それぞれ１００個を、１辺の長さが１００ｍｍの箱に入れ、その箱を様々な方向に１０分間振り、通気部材の脚部２ｈと別の通気部材の脚部２ｈの絡み合いや、通気膜４の破損の有無を目視にて確認した。通気部材Ｃ〜Ｅでは、脚部２ｈの絡み合いや、通気膜４の破損は確認されなかった。一方、通気部材Ｈでは、１００個のうち２０個について、脚部２ｈが絡み合っていた。Ａ寸法がＢ寸法より大きければ、通気部材の脚部２ｈによる他の通気部材の通気膜４の破損や、脚部２ｈの絡み合いを抑制できることが確認できた。 Moreover, about ventilation member CE (Examples 3-5) and ventilation member H (comparative example 3), each puts 100 pieces in the box whose length of one side is 100 mm, and puts the box in various directions After shaking for 10 minutes, the entanglement between the leg part 2h of the ventilation member and the leg part 2h of another ventilation member and the presence or absence of breakage of the ventilation film 4 were visually confirmed. In the ventilation members C to E, the entanglement of the leg portions 2h and the damage of the ventilation film 4 were not confirmed. On the other hand, in the ventilation member H, the leg 2h was intertwined with respect to 20 out of 100 pieces. If the A dimension was larger than the B dimension, it was confirmed that damage to the ventilation film 4 of the other ventilation member by the leg 2h of the ventilation member and entanglement of the leg 2h could be suppressed.

本発明の通気部材の一例を示す分解図The exploded view which shows an example of the ventilation member of this invention （ａ）は図１に示した通気部材の底面図、（ｂ）は（ａ）に示した通気部材のＡ−Ａ′断面図(A) is a bottom view of the ventilation member shown in FIG. 1, and (b) is a cross-sectional view taken along line AA ′ of the ventilation member shown in (a). 本発明の通気部材の他の例を示す断面図Sectional drawing which shows the other example of the ventilation member of this invention （ａ）および（ｂ）は通気部材の１つの脚部２ｈが他の通気部材の貫通孔３内に挿入された状態を説明する図(A) And (b) is a figure explaining the state by which one leg part 2h of the ventilation member was inserted in the through-hole 3 of another ventilation member. 本発明の通気部材の他の例を示す断面図Sectional drawing which shows the other example of the ventilation member of this invention （ａ）は本発明の通気部材の他の例を示す分解図、（ｂ）は（ａ）に示した通気部材の断面図(A) is the exploded view which shows the other example of the ventilation member of this invention, (b) is sectional drawing of the ventilation member shown to (a). 本発明の通気部材の他の例を示す分解図The exploded view which shows the other example of the ventilation member of this invention （ａ）は図７に示した通気部材の正面図、（ｂ）は（ａ）に示した通気部材の底面図からシール部を省略した図(A) is a front view of the ventilation member shown in FIG. 7, (b) is a view in which the seal portion is omitted from the bottom view of the ventilation member shown in (a). （ａ）は本発明の通気部材の他の例を示す正面図、（ｂ）は（ａ）に示した通気部材の底面図からシール部を省略した図(A) is the front view which shows the other example of the ventilation member of this invention, (b) is the figure which abbreviate | omitted the seal part from the bottom view of the ventilation member shown to (a). 図９に示した通気部材に抜け防止具が装着された状態を説明する正面図FIG. 9 is a front view for explaining a state where the removal prevention tool is attached to the ventilation member shown in FIG. 9. 図１０に示した抜け防止具の断面図Sectional drawing of the fall prevention tool shown in FIG. （ａ）は本発明の通気部材の一例が固定されたコネクタの斜視図、（ｂ）は（ａ）に示したコネクタのＢ−Ｂ′断面図(A) is a perspective view of a connector to which an example of a ventilation member of the present invention is fixed, and (b) is a cross-sectional view of the connector shown in (a) along BB ′. （ａ）本発明の通気部材の一例が固定された自動車用ランプの斜視図、（ｂ）は（ａ）に示した自動車用ランプのＣ−Ｃ′断面図(A) Perspective view of an automotive lamp to which an example of the ventilation member of the present invention is fixed, (b) is a cross-sectional view of the automotive lamp shown in FIG. 本発明の通気部材の一例が固定された電動ハブラシの部分断面図Partial sectional view of an electric toothbrush to which an example of the ventilation member of the present invention is fixed （ａ）は本発明の通気部材の一例が固定されたＥＣＵの斜視図、（ｂ）は（ａ）に示したＥＣＵカバーの上蓋の裏面図(A) is a perspective view of an ECU to which an example of the ventilation member of the present invention is fixed, and (b) is a rear view of the upper cover of the ECU cover shown in (a). （ａ）は比較例３の通気部材の正面図、（ｂ）は（ａ）に示した通気部材の底面図からシール部を省略した図(A) is the front view of the ventilation member of the comparative example 3, (b) is the figure which abbreviate | omitted the seal part from the bottom view of the ventilation member shown to (a). （ａ）および（ｂ）は従来の通気部材の一例を示す断面図(A) And (b) is sectional drawing which shows an example of the conventional ventilation member （ａ）は従来の通気部材の一例を示す分解図、（ｂ）は（ａ）に示した通気部材の断面図(A) is an exploded view showing an example of a conventional ventilation member, (b) is a sectional view of the ventilation member shown in (a). 従来の通気部材の他の例を説明する断面図Sectional drawing explaining the other example of the conventional ventilation member

Explanation of symbols

１，２１，３１通気部材
２支持体
２ａ支持部
２ｂ挿入部
２ｃ係止部
２ｄシール部
２ｅ保護部
２ｆ開口部
２ｇ保護部の上面
２ｈ脚部
２ｉスリット
２ｊ突出部
２ｋ溝部
３貫通孔
４通気膜
５補強材
６積層体
７筐体
７ａ筐体の支持部と向かい合う面の反対面
８筐体の開口部
９抜け防止具
９ａ柱状部
９ｂ通気孔
９ｃ鍔部
９ｄ返り部
９ｅ端面 1, 21 and 31 Ventilation member 2 Support body 2a Support portion 2b Insertion portion 2c Locking portion 2d Seal portion 2e Protection portion 2f Opening portion 2g Upper surface of protection portion 2h Leg portion 2i Slit 2j Protruding portion 2k Groove portion 3 Through hole 4 Venting membrane DESCRIPTION OF SYMBOLS 5 Reinforcement material 6 Laminate body 7 Case 7a Opposite side of the surface facing the support portion of the case 8 Opening portion of the case 9 Detachment prevention tool 9a Columnar part 9b Vent hole 9c Gutter part 9d Return part 9e End face

Claims

A ventilation member including a ventilation film that allows gas passing through the opening to pass through in a state of being fixed to the opening of the housing, and a support part that supports the ventilation film and an insertion part that is inserted into the opening And at least the insertion start side of the insertion part is divided into a plurality along the circumferential direction,
The insertion portion includes at least a plurality of legs on the insertion start side, and at least one leg includes a locking portion on the insertion start side,
Wherein the plurality of legs, looking contains at least one leg does not include the locking portion,
Legs including the locking part and legs not including the locking part are alternately arranged along the circumferential direction,
The support that can be seen in plan view along the gas permeation direction from the insertion portion side has a ring shape, and a minimum value of the ring width of the ring shape is a minimum ring width, and the insertion portion is inserted. Among the plurality of legs formed by dividing the insertion part into a plurality of legs at the start side end, the shortest distance between the legs with the longest shortest distance between two adjacent legs is the maximum distance between the legs. The ventilation member is characterized in that the minimum ring width is larger than the maximum distance between the leg portions .