Ventilation member

Abstract

To provide a ventilation member that is adapted to improve an ease of an elastic deformation of an insertion part when inserting the insertion part into an open part of a housing body.SOLUTION: A ventilation member 10 comprises: a support body 4a; and a ventilation film 2. The support body 4a contains a base part 11 and a leg part 12 that support the ventilation film 2. The leg part 12 includes: a plurality of insertion parts 21; and a claw part 23. In a plane surface A passing through a root part of each insertion part 21 while being orthogonal to a center shaft O of the support body 4a, when a virtual circle that passes end parts 21p on both sides in a width direction of an inner side surface 21c of each insertion part 21, and has the center shaft O as a center is defined as a first virtual circle C1, the inner side surface 21c of each insertion part 21 includes an expansion part 21d that is expanded to the center shaft O side from the first virtual circle C1. A ratio of a length in a radial direction of the claw part 23 to a length in a shaft direction of each insertion part 21 is 0.3 or more and 0.5 or less. In the plane surface A, the maximum length in the radial direction of the expansion part 21d is 0.1 mm or more and 1.5 mm or less.SELECTED DRAWING: Figure 4B

Description

Technical Field

[0001] The present invention relates to a ventilation member attached to an opening of a housing.

Background Art

[0002] Openings are provided in the housings of in-vehicle electrical components such as lamps, inverters, converters, electronic control units (ECUs), battery packs, radars, and cameras, as well as various electronic devices for home use, medical use, office use, etc., for the purpose of alleviating pressure fluctuations inside the housing or ventilating the inside of the housing. A ventilation member may be attached to the portion where this opening is provided. The ventilation member can ensure ventilation between the internal space and the external space of the housing while preventing the intrusion of water, dust, etc. into the housing.

[0003] For example, Patent Document 1 discloses a ventilation member 110 as shown in FIG. 12. In FIG. 12, (a) is a bottom view of the ventilation member 110, and (b) is a cross-sectional view taken along line c-c of the ventilation member 110 shown in (a). The ventilation member 110 includes a support 104, a ventilation film 102 disposed on the support 104, and a reinforcing material 106 laminated on the ventilation film 102. The support 104 has a base portion 111 and leg portions 112 extending from the base portion 111. The leg portions 112 have a plurality of insertion portions 121 whose insertion start sides are divided into a plurality along the circumferential direction by a slit 122 and elastically deformed inward to be inserted into the opening 151. As shown in FIG. 12(a), the inner peripheral surface and the outer peripheral surface of the leg portion 112 (insertion portion 121) have a shape along a virtual circle centered on the central axis X of the ventilation member 110. The plurality of insertion portions 121 have claw portions 123 protruding outward on the tip ends. The claw portions 123 serve as a return to prevent the leg portions 112 from coming out of the opening 151 of the housing 150.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] Conventional ventilation members as disclosed in Patent Document 1 have room for reexamination from the viewpoint of improving the ease of elastic deformation of the insertion portion when inserting the insertion portion into the opening of the housing.

[0006] Therefore, the present invention provides a ventilation member suitable for improving the ease of elastic deformation of the insertion portion when inserting the insertion portion into the opening of the housing.

MEANS FOR SOLVING THE PROBLEMS

[0007] The present invention is a ventilation member attachable to a housing having an internal space requiring ventilation and a ventilation opening, a support having ventilation holes as a part of a ventilation path between the internal space and the external space, and a ventilation film disposed on the support so as to close the ventilation holes on the external space side, wherein the support has a base portion supporting the ventilation film, and a portion for fixing the ventilation member to the opening of the housing, the portion extending from the base portion toward the internal space side and including legs, wherein the legs are divided into a plurality along the circumferential direction by slits at the insertion start side, and have a plurality of insertion portions that are reversibly elastically deformed toward the central axis side of the support and inserted and fixed into the opening, and claw portions that project from the end portion on the insertion start side of at least one of the plurality of insertion portions toward the outer peripheral side and can be locked to the housing. In a plane orthogonal to the central axis and passing through the root portions of the plurality of insertion portions, when a virtual circle centered on the central axis passing through both end portions in the width direction of the inner surface of each of the plurality of insertion portions is defined as a first virtual circle, the inner surface of each of the plurality of insertion portions has a projecting portion projecting toward the central axis side from the first virtual circle. The ratio of the radial length of the claw portion to the axial length of the insertion portion is 0.2 or more and 0.5 or less. Ventilation member is provided.

[0008] From another aspect, the present invention A ventilation member attachable to a housing having an internal space requiring ventilation and a ventilation opening, A support having a ventilation hole as part of a ventilation path between the internal space and the external space, A ventilation film disposed on the support so as to close the ventilation hole on the external space side, The support A base portion supporting the ventilation film, A portion for fixing the ventilation member to the opening of the housing, including legs extending from the base portion toward the internal space side, The legs The insertion start side is divided into a plurality along the circumferential direction by a slit, A plurality of insertion portions that are reversibly elastically deformed toward the central axis side of the support and inserted and fixed into the opening, and a claw portion that projects from an end portion on the insertion start side of at least one of the plurality of insertion portions toward the outer peripheral side and can be locked to the housing. In a plane orthogonal to the central axis and passing through the root portions of the plurality of insertion portions, when a virtual circle centered on the central axis passing through both end portions in the width direction of the inner surface of each of the plurality of insertion portions is defined as a first virtual circle, the inner surface of each of the plurality of insertion portions has a projecting portion projecting toward the central axis side from the first virtual circle. In the plane, the maximum radial length of the projecting portion is 0.1 mm or more and 1.5 mm or less. Ventilation member To provide.

Advantages of the Invention

[0009] The above ventilation member is suitable for improving the ease of elastic deformation of the insertion part when inserting the insertion part into the opening of the housing.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4A

Figure 4B

Figure 4C

Figure 5

Figure 6A

Figure 6B

Figure 6C

Figure 7A

Figure 7B

Figure 7C

Figure 8A

Figure 8B

Figure 8C

Figure 9A

Figure 9B

Figure 9C

Figure 10A

Figure 10B

Figure 10C

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0011] The ventilation member according to the first aspect of the present invention is a ventilation member that can be attached to a housing having an internal space that requires ventilation and a ventilation opening, a support having ventilation holes as a part of a ventilation path between the internal space and the external space, a ventilation film disposed on the support so as to close the ventilation hole on the external space side; The support includes: a base portion that supports the ventilation film; a portion for fixing the ventilation member to the opening of the housing, the portion including legs extending from the base portion toward the internal space side; The legs have an insertion start side that is divided into a plurality along the circumferential direction by slits, a plurality of insertion portions that are reversibly elastically deformed toward the central axis side of the support and inserted into and fixed to the opening, and claw portions that protrude from an end portion on the insertion start side of at least one of the plurality of insertion portions toward the outer peripheral side and can be locked to the housing; In a plane orthogonal to the central axis and passing through the root portions of the plurality of insertion portions, when a virtual circle centered on the central axis passing through both end portions in the width direction of the inner side surfaces of the plurality of insertion portions is defined as a first virtual circle, the inner side surfaces of the plurality of insertion portions have overhanging portions that overhang toward the central axis side from the first virtual circle. The ratio of the radial length of the claw portion to the axial length of the insertion portion is 0.2 or more and 0.5 or less.

[0012] The ventilation member according to the second aspect of the present invention is a ventilation member attachable to a housing having an internal space that requires ventilation and a ventilation opening, including a support having a ventilation hole as part of a ventilation path between the internal space and the external space, and a ventilation film disposed on the support so as to close the ventilation hole on the external space side. The support includes: a base portion that supports the ventilation film; a portion for fixing the ventilation member to the opening of the housing, the portion including legs extending from the base portion toward the internal space side; The legs have an insertion start side that is divided into a plurality along the circumferential direction by slits, A plurality of insertion portions that are reversibly elastically deformed on the central axis side of the support and inserted and fixed into the opening, and a claw portion that protrudes from at least one end on the insertion start side of the plurality of insertion portions toward the outer peripheral side and can be locked to the housing. In a plane orthogonal to the central axis and passing through the root portions of the plurality of insertion portions, when a virtual circle centered on the central axis passing through both ends in the width direction of the inner surfaces of the plurality of insertion portions is defined as a first virtual circle, each of the inner surfaces of the plurality of insertion portions has an overhanging portion that protrudes toward the central axis side more than the first virtual circle. In the plane, the maximum length in the radial direction of the overhanging portion is 0.1 mm or more and 1.5 mm or less.

[0013] In a third aspect of the present invention, for example, in the ventilation member according to the first or second aspect, the radial length of the claw portion is 0.3 mm or more and 3.0 mm or less.

[0014] In a fourth aspect of the present invention, for example, in the ventilation member according to any one of the first to third aspects, in the process of inserting the plurality of insertion portions into the opening so that the central axis coincides with the central axis of the opening, the adjacent insertion portions do not contact each other.

[0015] In a fifth aspect of the present invention, for example, in the ventilation member according to any one of the first to fourth aspects, in the plane, each of the inner surfaces of the plurality of insertion portions does not include a portion having a shape along the first virtual circle.

[0016] In a sixth aspect of the present invention, for example, in the ventilation member according to any one of the first to fifth aspects, in the plane, the overhanging portion includes a planar portion having a shape along a first virtual straight line passing through both ends in the width direction of the inner surface of the insertion portion.

[0017] In a seventh aspect of the present invention, for example, in the ventilation member according to any one of the first to sixth aspects, in the plane, the overhanging portion includes a recess that is recessed radially outward from a first virtual straight line passing through both ends in the width direction of the inner surface of the insertion portion.

[0018] In the eighth aspect of the present invention, for example, in the ventilation member according to the seventh aspect, the concave portion has a back surface portion having a shape along a virtual line parallel to the first virtual line.

[0019] In the ninth aspect of the present invention, for example, in the ventilation member according to any one of the first to eighth aspects, when a virtual circle having a diameter equal to or larger than the diameter of the first virtual circle centered on the central axis is defined as a second virtual circle in the plane, each of the plurality of insertion portions is arranged such that the outer peripheral surfaces are separated from each other along the second virtual circle.

[0020] In the tenth aspect of the present invention, for example, in the ventilation member according to the ninth aspect, the ratio of the circumferential length of the slit along the second virtual circle to the circumferential length of the insertion portion along the second virtual circle is 0.5 or more and 5 or less.

[0021] In the eleventh aspect of the present invention, for example, in the ventilation member according to the ninth or tenth aspect, the support body does not include other members that extend from the base portion toward the internal space side other than the leg portions.

[0022] In the twelfth aspect of the present invention, for example, in the ventilation member according to the eleventh aspect, the leg portions do not have other members provided between the insertion portions adjacent to each other along the second virtual circle.

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments.

[0024] [Ventilation member] As shown in FIGS. 1 to 2A, the ventilation member 10 according to an embodiment of the present invention is attached to the opening 51 of the housing 50. As shown in FIG. 2A, the opening 51 is a through-hole that communicates the internal space 52 of the housing 50 with the external space 54. The ventilation member 10 includes a ventilation film 2 and a support 4a. The ventilation film 2 and the support 4a each have a circular shape in plan view. The ventilation film 2 and the support 4a have a common central axis O. The thickness direction of the ventilation film 2 is parallel to the central axis O. The support 4a has a ventilation hole 3 as a part of the ventilation path between the internal space 52 and the external space 54. The ventilation film 2 is disposed on the support 4a so as to close the ventilation hole 3 on the external space 54 side. Ventilation can be performed between the internal space 52 and the external space 54 through the ventilation film 2. The housing 50 is, for example, an ECU (Electronic Control Unit) box of an automobile. Only a part of the housing 50 is shown in FIGS. 1 to 2A.

[0025] As shown in FIG. 2A, the support 4a has a base portion 11 and a leg portion 12. The base portion 11 supports the ventilation film 2 and has a substantially disk shape. The leg portion 12 is a portion for fixing the ventilation member 10 to the opening 51 of the housing 50. The leg portion 12 extends from the base portion 11 toward the internal space 52 side of the housing 50.

[0026] FIG. 3 is a side view of the support 4a included in the ventilation member 10. As shown in FIG. 3, the leg portion 12 has an insertion start side that is divided into a plurality along the circumferential direction by the slit 22. The leg portion 12 includes a plurality of insertion portions 21 that are reversibly elastically deformed toward the central axis O side of the support 4a and inserted and fixed into the opening 51 of the housing 50, and at least one end portion 21b on the insertion start side of the plurality of insertion portions 21 protrudes from the outer periphery (opposite to the central axis O of the support 4a) side and has a claw portion 23 that can be locked to the housing 50. Since the claw portion 23 functions as a return, it is possible to prevent the leg portion 12 from coming out of the opening 51 of the housing 50. As shown in FIG. 2A, the claw portion 23 has a contact surface 23a that can contact the surface on the inner space 52 side (downward in FIG. 2A) of the housing 50. The contact surface 23a has, for example, a planar shape. However, the contact surface 23a may have an uneven shape. When the contact surface 23a has an uneven shape, the frictional force of the contact surface 23a against the surface on the inner space 52 side of the housing 50 can be improved.

[0027] The plane corresponding to the line a-a in FIG. 3 is a plane A that is orthogonal to the central axis O of the support 4a and passes through the base portion 21a of the plurality of insertion portions 21. FIG. 4A is a perspective view of the support 4a cut along the plane A, and FIG. 4B is a cross-sectional view of the support 4a cut along the plane A. As shown in FIG. 4B, in the plane A, a virtual circle centered on the central axis O passing through both ends 21p in the width direction (circumferential direction) of the inner surface 21c of each of the plurality of insertion portions 21 is defined as the first virtual circle C 1 In the present embodiment, each inner surface 21c of the plurality of insertion portions 21 has a protruding portion 21d that protrudes toward the central axis O side more than the first virtual circle C 1 has.

[0028] In the ventilation member 10 according to the present embodiment, since each inner surface 21c of the plurality of insertion portions 21 has a protruding portion 21d that protrudes toward the central axis O side more than the first virtual circle C 1 has, stress is easily dispersed when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening 51. Therefore, the ventilation member 10 according to the present embodiment is suitable for improving the ease of elastic deformation of the insertion portion 21 when the insertion portion 21 is inserted into the opening 51 of the housing 50.

[0029] In a conventional ventilation member 110 as shown in FIG. 12, the inner peripheral surface and the outer peripheral surface of the leg portion 112 (insertion portion 121) have a shape along an imaginary circle centered on the central axis X of the ventilation member 110. The conventional ventilation member 110 does not have a protruding portion that protrudes toward the central axis X side from the imaginary circle centered on the central axis X. In the conventional ventilation member 110, the reversible deformation amount toward the central axis X side between the initial state and the maximum deformation state of the insertion portion 121 is usually about 1.3 mm. When the ventilation member 110 is attached to the opening 151 of the housing 150, if the insertion portion 121 is deformed toward the central axis X side by, for example, more than 1.3 mm, the deformed insertion portion 121 may not return to its original state, or a crack may occur on the inner peripheral surface of the base portion of the insertion portion 121. If the ventilation member 110 in this state is left attached to the opening 151, there is a concern that the ventilation member 110 may easily come off from the housing 150. On the other hand, the ventilation member 10 according to this embodiment has the protruding portion 21d, and therefore stress is easily dispersed when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening 51. Therefore, when the ventilation member 10 is attached to the opening 51 of the housing 50, it is possible to suppress the insertion portion 21 deformed toward the central axis O side from failing to return to its original shape and the occurrence of cracks in the inner surface 21c of the base portion 21a of the insertion portion 21.

[0030] In this embodiment, the ratio (L 2 / L 1 ) of the radial length L 2 of the claw portion 23 to the axial length L 1 of the insertion portion 21 is 0.2 or more and 0.5 or less. As described above, the ventilation member 10 according to this embodiment is suitable for improving the ease of elastic deformation of the insertion portion 21 when the insertion portion 21 is inserted into the opening 51 of the housing 50. Therefore, in the ventilation member 10 according to this embodiment, compared to a conventional ventilation member 110 as shown in FIG. 12, even if the ratio of the radial length L 2 of the claw portion 23 to the axial length L 1 of the insertion portion 21 (L 2 / L 1 ) is large, the claw portion 23 is less likely to prevent the insertion of the insertion portion 21 into the opening 51.1 The radial length L of the claw portion 23 with respect to 2 By increasing [the radial length L of the claw portion 23 with respect to , it is possible to further suppress the leg portion 12 from coming out of the opening 51 of the housing 50.

[0031] The longitudinal sectional view of FIG. 2A corresponds to the sectional view cut along the plane corresponding to the line b-b of FIG. 4B. That is, the sectional view of FIG. 2A is, in the plane A, a first virtual straight line R passing through both end portions 21p in the width direction of the inner surface 21c of one insertion portion 21 1 is perpendicular to [the first virtual straight line R passing through both end portions 21p in the width direction of the inner surface 21c of one insertion portion 21 and is a sectional view of the ventilation member 10 cut along the plane corresponding to the second virtual straight line R passing through the central axis O. FIG. 2B is a partially enlarged view of FIG. 2A. In this specification, in FIG. 2B, the distance in the central axis O direction of the insertion portion 21 from the deepest part 22a of the slit 22 to the contact surface 23a of the claw portion 23 is defined as the axial length L 2 of the insertion portion 21. When the contact surface 23a of the claw portion 23 has an uneven shape, the distance in the central axis O direction of the insertion portion 21 from the deepest part 22a of the slit 22 to the virtual surface in contact with the convex portion of the contact surface 23a of the claw portion 23 is regarded as the axial length L 1 of the insertion portion 21. Further, in this specification, in FIG. 2B, the radial distance from the outer peripheral surface 21f of the insertion portion 21 to the outer peripheral surface 23f of the claw portion 23 is defined as the radial length L 1 of the claw portion 23. In the example shown in FIGS. 2A to 2B, the radial length of the contact surface 23a corresponds to the radial length L 2 of the claw portion 23. 2

[0032] The lower limit of the ratio (L 2 / L 1 ) may be 0.25 or more. The upper limit of the ratio (L 2 / L 1 ) may be 0.45 or less, may be 0.4 or less, and may further be 0.35 or less.

[0033] For example, the axial length L 1 of the insertion portion 21 is 0.6 mm or more and 15.0 mm or less. The axial length L 1The lower limit may be 1.0 mm or more, 1.5 mm or more, or even 2.0 mm or more. The axial length L of the insertion portion 21 1 The upper limit may be 12.0 mm or less, 10.0 mm or less, or even 8.0 mm or less.

[0034] The radial length L of the claw portion 23 2 is settable according to the axial length L of the insertion portion 21 1 The radial length L of the claw portion 23 2 is preferably 0.3 mm or more and 3.0 mm or less. The radial length L of the claw portion 23 2 The lower limit may be 0.4 mm or more, 0.5 mm or more, or even 0.6 mm or more. The radial length L of the claw portion 23 2 The upper limit may be 2.5 mm or less, 2.0 mm or less, or even 1.5 mm or less.

[0035] From another aspect, in the present embodiment, the maximum radial length L of the protruding portion 21d 3 is 0.1 mm or more and 1.5 mm or less. When the maximum radial length L of the protruding portion 21d 3 is within the above numerical range, the stress when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening 51 can be sufficiently dispersed.

[0036] FIG. 4C is a partially enlarged view of FIG. 4B. In this specification, as shown in FIG. 4C, in the plane A, the maximum radial length between the first virtual circle C 1 and the inner surface 21c of the insertion portion 21 is defined as the maximum radial length L of the protruding portion 21d 3 and defined.

[0037] The maximum radial length L of the protruding portion 21d 3 The lower limit may be 0.2 mm or more, 0.3 mm or more. The maximum radial length L of the protruding portion 21d 3 The upper limit may be 1.2 mm or less, 1.0 mm or less.

[0038] As shown in FIG. 4C, in the present embodiment, the maximum radial length L of the overhanging portion 21d 3 is the length along the second virtual straight line R 2 . However, the maximum radial length L of the overhanging portion 21d 3 is not limited to the example shown in FIG. 4C. The maximum radial length L of the overhanging portion 21d 3 may be the length along a virtual straight line that is not perpendicular to the first virtual straight line R 1 in the plane A but passes through the central axis O.

[0039] FIG. 5 is a longitudinal sectional view for explaining the movement of the insertion portion 21 when the ventilation member 10 is attached to the opening 51 of the housing 50. (a) shows the initial state of the insertion portion 21, (b) shows the maximum deformed state of the insertion portion 21, and (c) shows the attached state of the insertion portion 21. Here, the sectional view of FIG. 5 corresponds to the sectional view cut along a plane corresponding to the line b-b in FIG. 4B. That is, the sectional view of FIG. 5 is a sectional view of the ventilation member 10 cut along a plane that is perpendicular to the first virtual straight line R 1 passing through both ends 21p in the width direction of the inner surface 21c of one insertion portion 21 in the plane A and corresponds to the second virtual straight line R 2 passing through the central axis O. In FIG. 5, for convenience, the left half of the central axis O is omitted. In FIG. 5(a), the radial position of the inner surface 21c closest to the central axis O is defined as the initial position P 0 of the insertion portion 21. In FIG. 5(b), the radial position of the inner surface 21c closest to the central axis O is defined as the maximum deformation position P max of the insertion portion 21. In FIG. 5(c), the radial position of the inner surface 21c closest to the central axis O is defined as the attachment position P 1 of the insertion portion 21.

[0040] In this specification, as shown in FIG. 5(b), the initial position P 0 of the insertion portion 21 and the maximum deformation position P maxThe radial distance between them is regarded as the reversible deformation amount D between the initial state and the maximum deformed state of the insertion portion 21. In the present embodiment, the deformation amount D is preferably 1.2 mm or more and 2.5 mm or less in the radial direction of the ventilation member 10. The lower limit of the deformation amount D may be 1.5 mm or more, or may be 2.0 mm or more.

[0041] In the example shown in FIG. 5, a plurality of insertion portions 21 are inserted into the opening portion 51 so that the central axis O of the support 4a coincides with the central axis of the opening portion 51. As shown in FIG. 5(b), in the insertion process, the plurality of insertion portions 21 elastically deform in a direction approaching the central axis O. In the insertion process as shown in FIG. 5(b), the adjacent insertion portions 21 may not contact each other. According to such a configuration, a decrease in the reversible deformation amount D between the initial state and the maximum deformed state of the insertion portion 21 due to contact between the adjacent insertion portions 21 can be suppressed.

[0042] As shown in FIG. 3, the insertion portion 21 is a member that extends from the base portion 11 toward the inner space 52 side (downward in FIG. 3) of the housing 50. The insertion portion 21 may be formed such that the circumferential width gradually decreases from the root portion 21a toward the end portion 21b (downward in FIG. 3) on the insertion start side. Depending on the shape of the insertion portion 21, the slit 22 may be formed such that the circumferential width gradually decreases in the upward direction in FIG. 3.

[0043] In the example shown in FIGS. 1 to 4B, the ventilation member 10 has three insertion portions 21. However, the number of insertion portions 21 included in the ventilation member 10 is not limited. The number of insertion portions 21 in the ventilation member 10 according to the present embodiment is, for example, 2 or more and 6 or less. The number of insertion portions 21 in the ventilation member 10 is preferably 3 or 4, and more preferably 3. According to such a configuration, while the insertion resistance into the opening portion 51 can be reduced, the detachment of the ventilation member 10 from the opening portion 51 can be suppressed, and stable fixing can be achieved.

[0044] As shown in FIG. 4B, in the plane A, the inner surface 21c of each of the plurality of insertion portions 21 is the first virtual circle C 1It is preferably free of a portion having a shape along [it]. According to such a configuration, the stress dispersion effect when the insertion portion 21 is elastically deformed toward the central axis O and inserted into the opening portion 51 can be improved.

[0045] As shown in FIG. 4C, in the plane A, the protruding portion 21d preferably includes a planar portion 21e having a planar shape. The planar portion 21e preferably has a shape along the first virtual straight line R 1 It is preferably free of a portion having a shape along [it]. According to such a configuration, the stress dispersion effect when the insertion portion 21 is elastically deformed toward the central axis O and inserted into the opening portion 51 can be improved.

[0046] As shown in FIG. 4C, in this embodiment, the protruding portion 21d includes one planar portion 21e having a shape along the first virtual straight line R 1 In the example shown in FIG. 4C, one planar portion 21e is a plane corresponding to a straight line connecting both end portions 21p in the width direction of the inner surface 21c of the insertion portion 21. However, the planar portion 21e included in the protruding portion 21d is not limited to the example shown in FIG. 4C. The protruding portion 21d may include two or more planar portions 21e having a shape along the first virtual straight line R 1 It may include two or more planar portions 21e having a shape along [it].

[0047] As shown in FIG. 4B, in the plane A, a virtual circle having a diameter equal to or larger than the diameter of the first virtual circle C 1 centered on the central axis O is defined as the second virtual circle C 2 In this embodiment, each of the plurality of insertion portions 21 is preferably arranged such that the outer peripheral surfaces 21f are spaced apart from each other along the second virtual circle C 2 A slit 22 is formed between adjacent insertion portions 21.

[0048] As shown in FIG. 4B, each of the plurality of insertion portions 21 is more preferably arranged such that the outer peripheral surfaces 21f are equally spaced apart from each other along the second virtual circle C 2 However, each of the plurality of insertion portions 21 may be arranged such that the outer peripheral surfaces 21f are unevenly spaced apart from each other along the second virtual circle C 2 It may be arranged such that the outer peripheral surfaces 21f are unevenly spaced apart from each other along [it].

[0049] As shown in FIG. 4B, the second virtual circle C 2 may have a diameter larger than that of the first virtual circle C 1 In this case, as shown in FIG. 4C, in the plane A, an end face 21g is formed between the widthwise end 21p of the inner surface 21c of the insertion portion 21 and the widthwise end 21q of the outer peripheral surface 21f. The end face 21g is a surface discontinuous with the inner surface 21c. In the present embodiment, the claw portion 23 has an end face 23g formed so as to be a surface continuous with the end face 21g on the end 21b side of the insertion start side of the insertion portion 21.

[0050] In the present embodiment, the difference between the diameter of the second virtual circle C 2 and the diameter of the first virtual circle C 1 is preferably 0 mm or more and 0.5 mm or less. In the example shown in FIG. 4C, the difference between the diameter of the second virtual circle C 2 and the diameter of the first virtual circle C 1 corresponds to the radial length of the end face 21g.

[0051] As shown in FIG. 4B, the plurality of insertion portions 21 are arranged in the inner region of the second virtual circle C 2 The diameter of the second virtual circle C 2 is less than the diameter of the opening 51. When the ventilation member 10 is viewed from below along the central axis O, the plurality of insertion portions 21 are arranged so as to surround the ventilation holes 3. The space surrounded by the plurality of insertion portions 21 functions as a ventilation path between the inside and outside of the housing 50.

[0052] As shown in FIG. 4C, in the plane A, the circumferential length L 2 of the insertion portion 21 along the second virtual circle C 4 with respect to the circumferential length L 2 of the slit 22 along the second virtual circle C 5 ratio (L 5 / L 4) is preferably 0.5 or more and 5 or less. According to such a configuration, when the insertion portion 21 is elastically deformed toward the central axis O and inserted into the opening portion 51, the adjacent insertion portions 21 are less likely to contact each other. Therefore, a decrease in the reversible deformation amount D between the initial state and the maximum deformed state of the insertion portion 21 due to the contact between the adjacent insertion portions 21 can be suppressed.

[0053] Ratio (L 5 / L 4 ) may have a lower limit of 1 or more, 1.5 or more, 2 or more, 2.5 or more, or even 3 or more.

[0054] As shown in FIG. 4A, in the present embodiment, the shape of the base portion 21a of the insertion portion 21 and the shape from the base portion 21a to the end portion 21b on the insertion start side may be the same. That is, the insertion portion 21 may have a protruding portion 21d extending from the base portion 21a to the end portion 21b on the insertion start side. According to such a configuration, the stress dispersion effect when the insertion portion 21 is elastically deformed toward the central axis O and inserted into the opening portion 51 can be improved. However, the shape from the base portion 21a to the end portion 21b on the insertion start side of the insertion portion 21 is not limited to the example shown in FIG. 4A. The shape of the base portion 21a of the insertion portion 21 and the shape from the base portion 21a to the end portion 21b on the insertion start side may be different.

[0055] In the present embodiment, it is preferable that the support 4a does not include other members extending from the base portion 11 toward the internal space 52 side other than the leg portion 12. According to such a configuration, it is possible to avoid the elastic deformation of the insertion portion 21 toward the central axis O being inhibited by other members.

[0056] Examples of other members include a stopper portion provided so as to overlap the central axis O, a stopper portion provided between adjacent insertion portions 21, and the like. The stopper portion is a member having a function of restricting the range of elastic deformation of the insertion portion 21 toward the central axis O. In the present embodiment, the leg portion 12 is the second virtual circle C 2It is preferable not to have other members (for example, stopper portions) provided between the insertion portions 21 adjacent to each other along [the relevant direction].

[0057] As shown in FIGS. 1 to 2A, the ventilation member 10 according to the present embodiment further includes a cover member 6 and a seal member 8. The cover member 6 has a circular shape in plan view. The ventilation film 2, the support 4a, and the cover member 6 have a common central axis O.

[0058] The cover member 6 is attached to the support 4a so as to cover the ventilation film 2. A space is formed between the ventilation film 2 and the cover member 6. A space is also formed between the outer peripheral portion of the cover member 6 and the outer peripheral portion of the support 4a. These spaces also function as part of the ventilation path between the internal space 52 and the external space 54.

[0059] The seal member 8 is an elastic member for sealing the gap between the support 4a and the housing 50 when the ventilation member 10 is attached to the housing 50. The seal member 8 is an annular member attached around the opening 51 and in the gap between the support 4a and the housing 50. The seal member 8 is manufactured using, for example, an elastomer such as nitrile rubber, ethylene-propylene rubber, silicone rubber, fluororubber, acrylic rubber, hydrogenated nitrile rubber, etc. Instead of the elastomer, the seal member 8 may be manufactured from a foam.

[0060] As shown in FIG. 5(c), when the leg portion 12 of the support 4a is attached to the opening 51 of the housing 50, the support 4a is pushed back in the direction of coming off from the housing 50 by the elastic force of the seal member 8 sandwiched between the support 4a and the housing 50. At this time, on the internal space 52 side of the housing 50, the claw portion 23 is locked to the housing 50, thereby suppressing the ventilation member 10 from coming off the housing 50. Note that a portion corresponding to the seal member 8 may be integrally provided on the support 4a by a technique such as two-color molding or insert molding. Further, the seal member 8 may be adhered to the support 4a.

[0061] The ventilation film 2 is not particularly limited in its structure and material as long as it has the property of allowing gas permeation and preventing liquid permeation. FIG. 11 is a cross-sectional view showing an example of the ventilation film 2. As shown in FIG. 11, the ventilation film 2 may have a film main body 2a and a reinforcing material 2b laminated on the film main body 2a. By providing the reinforcing material 2b, the strength of the ventilation film 2 is improved. The ventilation film 2 may be composed only of the film main body 2a.

[0062] The film main body 2a may be subjected to an oil-repellent treatment or a water-repellent treatment. These liquid-repellent treatments can be performed by applying a substance with a low surface tension to the film main body 2a, drying it, and then curing it. The liquid-repellent agent used for the liquid-repellent treatment is preferably one that can form a film with a lower surface tension than the film main body 2a. For example, a liquid-repellent agent containing a polymer having a perfluoroalkyl group is preferably used. The liquid-repellent agent is applied to the film main body 2a by a known method such as impregnation or spraying.

[0063] In a typical example, the film main body 2a is a porous film made of a fluororesin or a polyolefin. From the viewpoint of ensuring sufficient waterproofness, a resin porous film having an average pore diameter of 0.01 μm to 10 μm can be preferably used.

[0064] Suitable fluororesins for the film main body 2a include polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, and tetrafluoroethylene-ethylene copolymer. Suitable polyolefins for the film main body 2a include polymers or copolymers of monomers such as ethylene, propylene, 4-methylpentene-1, and 1-butene. A nanofiber film porous body using polyacrylonitrile, nylon, or polylactic acid may also be used. Among them, PTFE, which can ensure high air permeability in a small area and is also excellent in the ability to prevent foreign matter from entering the inside of the housing, is preferably used. The PTFE porous film can be manufactured by a known molding method such as a stretching method or an extraction method.

[0065] The reinforcing member 2b can be a member made of a resin such as polyester, polyethylene, or aramid. The form of the reinforcing member 2b is not particularly limited as long as the air permeability of the air-permeable film 2 can be maintained. For example, it can be a woven fabric, non-woven fabric, net, mesh, sponge, foam, or porous body. The film main body 2a and the reinforcing member 2b may be bonded together by thermal lamination, heat welding, ultrasonic welding, or an adhesive.

[0066] The thickness of the air-permeable film 2 is preferably in the range of 1 μm to 5 mm in consideration of strength and / or ease of handling. The air permeability of the air-permeable film 2 is preferably in the range of 0.1 to 300 sec / 100 cm in terms of Gurley value obtained by the Gurley tester method defined in JIS P 8117:2009. 3 The water pressure resistance of the air-permeable film 2 is preferably 1.0 kPa or more.

[0067] [Manufacturing method of air-permeable member] The air-permeable member 10 according to the above-described embodiment can be manufactured, for example, by the following method.

[0068] First, the support 4a and the cover member 6 are manufactured separately. The support 4a and the cover member 6 can each be manufactured by a known injection molding method. As the materials for the support 4a and the cover member 6, for example, thermoplastic resins can be used. Examples of the thermoplastic resin include polybutylene terephthalate, nylon, and polyethylene terephthalate.

[0069] Note that the housing 50 can be manufactured by a known injection molding method. As shown in FIGS. 1 to 2A, it is desirable that the opening diameter of the opening 51 on the external space 54 side is larger than the opening diameter of the opening 51 on the internal space 52 side. According to such a configuration, it is easy to insert the leg portion 12 into the opening 51 of the housing 50. Further, according to such a configuration, the cross-sectional area of the ventilation path from the ventilation hole 3 to the internal space 52 can be ensured to be relatively wide to some extent. Furthermore, when the opening diameter of the opening 51 on the internal space 52 side is reduced, the leg portion 12 is arranged so as to incline with respect to the central axis O. This is preferable for securely engaging the claw portion 23 with the opening 51 and enhancing the attachment strength of the ventilation member 10 to the housing 50.

[0070] The present invention is not limited to the examples described in the above embodiments. For example, in the present invention, the shape of the protruding portion 21d provided on each inner surface 21c of the plurality of insertion portions 21 is not limited to the examples shown in FIGS. 4A to 4C. The present invention may include modified examples in which the specific configuration in the above embodiments is changed. Hereinafter, Modified Examples 1 to 5 of the present invention will be described. Note that, hereinafter, the same reference numerals may be used for the same elements as those in the above embodiments, and the description may be omitted.

[0071] (Modified Example 1) A modified example 1 of the ventilation member according to the present embodiment is shown in FIGS. 6A to 6C. FIG. 6A is a perspective view of a support 4b included in the ventilation member according to the modified example 1 cut along a plane A corresponding to the line a-a in FIG. 3. FIG. 6B is a cross-sectional view of the support 4b cut along the plane A. FIG. 6C is a partially enlarged view of FIG. 6B. The support 4b according to the modified example 1 has the same structure as the support 4a of the ventilation member 10 described above with reference to FIGS. 4A to 4C, except that the second virtual circle C 2 has the same diameter as the diameter of the first virtual circle C 1 .

[0072] Similar to the ventilation member 10 described above, the ventilation member according to the modified example 1 is suitable for improving the ease of elastic deformation of the insertion portion 21 when the insertion portion 21 is inserted into the opening 51 of the housing 50.

[0073] As shown in FIG. 6B, in the ventilation member according to Modification 1, the second virtual circle C 2 has a diameter difference of 0 mm from the diameter of the first virtual circle C 1 . In this case, as shown in FIG. 6C, on the plane A, the end 21p of the inner surface 21c of the insertion portion 21 overlaps with the end 21q of the outer peripheral surface 21f. Therefore, there is no end face between the end 21p and the end 21q.

[0074] (Modification 2) Modification 2 of the ventilation member according to the present embodiment is shown in FIGS. 7A to 7C. FIG. 7A is a perspective view of a support 4c provided in the ventilation member according to Modification 2 cut along the plane A corresponding to the line a-a in FIG. 3. FIG. 7B is a cross-sectional view of the support 4c cut along the plane A. FIG. 7C is a partially enlarged view of FIG. 7B. The support 4c according to Modification 2 has the same structure as the support 4a of the ventilation member 10 described above with reference to FIGS. 4A to 4C, except that on the plane A, the end face 21g of the insertion portion 21 is located more inward in the circumferential direction than the end face 23g of the claw portion 23.

[0075] Similar to the ventilation member 10 described above, the ventilation member according to Modification 2 is suitable for improving the ease of elastic deformation of the insertion portion 21 when the insertion portion 21 is inserted into the opening 51 of the housing 50.

[0076] Furthermore, in the ventilation member according to Modification 2, on the plane A, since the end face 21g of the insertion portion 21 is located more inward in the circumferential direction than the end face 23g of the claw portion 23, for example, compared with the ventilation member of Modification 1, the area occupied by the insertion portion 21 can be reduced. As a result, when the insertion portion 21 is inserted into the opening 51 of the housing 50, the insertion portion 21 is more easily elastically deformed.

[0077] As shown in FIG. 7C, in the ventilation member according to Modification 2, on plane A, the end 21p of the inner surface 21c of the insertion portion 21 and the end 21q of the outer peripheral surface 21f are located on the inner side in the circumferential direction than the end surface 23g of the claw portion 23. Therefore, in the ventilation member according to Modification 2, the length of the end surface 21g on plane A is larger than the length of the end surface 21g in the ventilation member 10 described above. Further, on plane A, since the end 21p of the inner surface 21c of the insertion portion 21 is located on the inner side in the circumferential direction than the end surface 23g of the claw portion 23, in the ventilation member according to Modification 2, the first virtual circle C 1 has a diameter smaller than the diameter of the first virtual circle C 1 in the ventilation member 10 described above.

[0078] In the ventilation member according to Modification 2, the end surface 21g on the end 21b side of the insertion start side of the insertion portion 21 and the end surface 23g of the claw portion 23 are not continuous surfaces.

[0079] As shown in FIG. 7C, in the ventilation member according to Modification 2, on plane A, both end surfaces 21g in the width direction of the insertion portion 21 may have a shape along the third virtual line R 2 parallel to the second virtual line R 3 and the fourth virtual line R 4 respectively.

[0080] Although not shown, the support 4c according to Modification 2 may be further deformed so that the second virtual circle C 2 has the same diameter as the diameter of the first virtual circle C 1 . That is, the support 4b according to Modification 1 and the support 4c according to Modification 2 may be combined. In this case, on plane A, there is no end surface between the end 21p and the end 21q.

[0081] (Modification 3) Modification example 3 of the ventilation member according to the present embodiment is shown in FIGS. 8A to 8C. FIG. 8A is a perspective view of a support 4d included in the ventilation member according to modification example 3 cut along a plane A corresponding to the line a-a in FIG. 3. FIG. 8B is a cross-sectional view of the support 4d cut along the plane A. FIG. 8C is a partially enlarged view of FIG. 8B. The support 4d according to modification example 3 has the same structure as the support 4b of modification example 1 described above using FIGS. 6A to 6C, except that in the plane A, the overhanging portion 21d includes a concave portion 21h recessed outward in the radial direction from the first virtual straight line R 1 The ventilation member according to modification example 3 is suitable for improving the ease of elastic deformation of the insertion portion 21 when the insertion portion 21 is inserted into the opening 51 of the housing 50, similarly to the ventilation member of modification example 1 described above.

[0082] The ventilation member according to modification example 3 is suitable for improving the ease of elastic deformation of the insertion portion 21 when the insertion portion 21 is inserted into the opening 51 of the housing 50, similarly to the ventilation member of modification example 1 described above.

[0083] Furthermore, in the ventilation member according to modification example 3, in the plane A, since the overhanging portion 21d includes the concave portion 21h recessed outward in the radial direction from the first virtual straight line R 1 stress is more likely to be dispersed when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening 51.

[0084] As shown in FIG. 8C, in the ventilation member according to modification example 3, the overhanging portion 21d includes two flat portions 21e having a shape along the first virtual straight line R 1 The concave portion 21h is located between the two flat portions 21e.

[0085] As shown in FIG. 8C, in the ventilation member according to modification example 3, the maximum length L 3 in the radial direction of the overhanging portion 21d is the length along a fifth virtual straight line R 1 which is not perpendicular to the first virtual straight line R in the plane A but passes through the central axis O 5 and may be.

[0086] As shown in FIG. 8C, in the ventilation member according to modification example 3, in the plane A, the concave portion 21h is a sixth virtual straight line R 1 parallel to 6It has a back surface portion 21i having a shape along [the relevant reference]. Due to such a configuration, in the ventilation member according to the third modification, for example, compared with the ventilation member of the first modification, the flexibility of the entire insertion portion 21 is improved. Therefore, when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening portion 51, the insertion portion 21 is more likely to be deformed.

[0087] As shown in FIG. 8C, in the ventilation member according to the third modification, in the plane A, the concave portion 21h has two side surface portions 21j that define the concave portion 21h together with the back surface portion 21i and face each other in the circumferential direction. The two side surface portions 21j may be planes parallel to the second virtual straight line R 2 as well.

[0088] The radial length of the concave portion 21h in the plane A can be appropriately set according to the radial length of the protruding portion 21d.

[0089] Although not shown, the second virtual circle C 2 may have a diameter larger than the diameter of the first virtual circle C 1 by further deforming the support 4d according to the third modification. That is, the support 4a of the ventilation member 10 described above and the support 4d according to the third modification may be combined. In this case, in the plane A, an end face 21g is formed between the end 21p of the inner surface 21c of the insertion portion 21 and the end 21q of the outer peripheral surface 21f.

[0090] (Fourth Modification) A fourth modification of the ventilation member according to the present embodiment is shown in FIGS. 9A to 9C. FIG. 9A is a perspective view of a support 4e included in the ventilation member according to the fourth modification cut along the plane A corresponding to the line a-a in FIG. 3. FIG. 9B is a cross-sectional view of the support 4e cut along the plane A. FIG. 9C is a partially enlarged view of FIG. 9B. The support 4e according to the fourth modification has the same structure as the support 4a of the ventilation member 10 described above with reference to FIGS. 4A to 4C in the plane A, except that the protruding portion 21d includes a concave portion 21h that is recessed radially outward of the first virtual straight line R 1 as well.

[0091] The ventilation member according to Modification 4 is suitable for improving the ease of elastic deformation of the insertion portion 21 when inserting the insertion portion 21 into the opening 51 of the housing 50, similar to the ventilation member 10 described above.

[0092] Furthermore, in the ventilation member according to Modification 4, on the plane A, the protruding portion 21d includes a concave portion 21h that is recessed radially outward of the first virtual straight line R 1 By including this, when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening 51, the stress is more likely to be dispersed.

[0093] As shown in FIG. 9C, in the ventilation member according to Modification 4, similar to the ventilation member according to Modification 3, the protruding portion 21d includes two flat portions 21e having a shape along the first virtual straight line R 1 A concave portion 21h is located between the two flat portions 21e.

[0094] As shown in FIG. 9C, in the ventilation member according to Modification 4, similar to the ventilation member according to Modification 3, the maximum radial length L of the protruding portion 21d 3 On the plane A, is not perpendicular to the first virtual straight line R 1 But may be a length along the fifth virtual straight line R that passes through the central axis O 5 And can be.

[0095] As shown in FIG. 9C, in the ventilation member according to Modification 4, on the plane A, the concave portion 21h has two inclined surfaces 21k that define the concave portion 21h and face each other in the circumferential direction. The inclined surface 21k is a surface having a certain slope with respect to the first virtual straight line R 1 With such a configuration, in the ventilation member according to Modification 4, for example, compared to the ventilation member 10 described above, the flexibility of the entire insertion portion 21 is improved. Therefore, when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening 51, the insertion portion 21 is more likely to deform.

[0096] As shown in FIG. 9C, in the ventilation member according to Modification 4, on the plane A, the concave portion 21h has a V shape.

[0097] The radial length of the recess 21h in the plane A can be appropriately set according to the radial length of the protruding portion 21d.

[0098] Although not shown, the second virtual circle C 2 may have the same diameter as the first virtual circle C 1 The support 4e according to the fourth modification may be further modified. That is, the support 4e according to the fourth modification and the support 4c according to the second modification may be combined. In this case, in the plane A, there is no end face between the end 21p and the end 21q.

[0099] (Modification 5) A fifth modification of the ventilation member according to the present embodiment is shown in FIGS. 10A to 10C. FIG. 10A is a perspective view of a support 4f included in the ventilation member according to the fifth modification cut along a plane A corresponding to the line a-a in FIG. 3. FIG. 10B is a cross-sectional view of the support 4f cut along the plane A. FIG. 10C is a partially enlarged view of FIG. 10B. The support 4f according to the fifth modification has the same structure as the support 4e of the fourth modification described above using FIGS. 9A to 9C, except that the recess 21h has a U-shape in the plane A.

[0100] As shown in FIG. 10C, in the ventilation member according to the fifth modification, in the plane A, the recess 21h has a U-shape. With such a configuration, in the ventilation member according to the fifth modification, for example, compared with the ventilation member of the fourth modification described above, when the insertion portion 21 is elastically deformed toward the central axis O side and inserted into the opening 51, the stress is more easily dispersed.

[0101] As shown in FIG. 10C, in the ventilation member according to the fifth modification, similar to the ventilation members according to the third and fourth modifications, the maximum radial length L 3 of the protruding portion 21d is, in the plane A, the length along a fifth virtual straight line R 1 that is not perpendicular to the first virtual straight line R 5 but passes through the central axis O.

[0102] The radial length of the recess 21h in the plane A can be appropriately set according to the radial length of the protruding portion 21d.

[0103] Although not shown, the second virtual circle C 2 has the same diameter as the first virtual circle C 1 The support 4f according to the fifth modification may be further modified. That is, the support 4f according to the fifth modification and the support 4c according to the second modification may be combined. In this case, in the plane A, there is no end face between the end 21p and the end 21q.

[0104] (Other Modifications) Although not shown, for example, in the plane A, the protruding portion 21d may include a convex portion protruding radially inward of the first virtual straight line R 1 Even with such a configuration, the ease of elastic deformation of the insertion portion 21 when inserting the insertion portion 21 into the opening 51 of the housing 50 can be improved. Further, for example, in the plane A, the protruding portion 21d may include a plurality of recesses 21h. Thereby, for example, in the plane A, the inner surface 21c of the insertion portion 21 may have a corrugated shape.

[0105] As long as there is no technical contradiction, the above examples may be combined with each other.

Industrial Applicability

[0106] The ventilation member of the present invention can be used, for example, in housings of in-vehicle electrical components such as lamps, inverters, converters, electronic control units (ECUs), battery packs, radars, and cameras, as well as various electronic devices for home, medical, office, etc.

Explanation of Reference Numerals

[0107] 2 Ventilation film 2a Film body 2b Reinforcing material 3 Ventilation hole 4a, 4b, 4c, 4d, 4e, 4f Support 6 Cover member 8 Sealing member 10 Venting member 11 Base part 12 Leg part 21 Insertion part 21a Root part 21b End part on the insertion start side 21c Inner surface 21d Protruding part 21e Flat part 21f Outer peripheral surface 21g End face 21h Recessed part 21i Rear surface 21j Side surface 21k Inclined surface 21p End part in the width direction of the inner surface 21c 21q End part in the width direction of the outer peripheral surface 21f 22 Slit 22a Deepest part 23 Claw part 23a Contact surface 23f Outer peripheral surface 23g End face O Central axis C 1 First virtual circle C 2 Second virtual circle R 1 First virtual straight line R 2 Second virtual straight line R 3 Third virtual straight line R 4 Fourth virtual straight line R 5 Fifth virtual straight line R 6 Sixth virtual straight line L 1 Axial length of the insertion part 21 L 2 Radial length of the claw part 23 L 3 Maximum radial length of the protruding part 21d L 4 Circumferential length of the insertion part 21 L 5 Circumferential length of the slit 22 Reversible deformation amount between the initial state and the maximum deformed state of the D insertion part 21 P 0 Initial position of the insertion part 21 P max Maximum deformation position of the insertion part 21 P 1 Mounting position of the insertion part 21 50 Housing 51 Opening 52 Internal space 54 External space

Claims

1. A ventilation member that can be attached to a housing having an internal space that requires ventilation and an opening for ventilation, A support having an air hole as part of the ventilation path between the internal space and the external space; A ventilation membrane is disposed on the support so as to close the ventilation hole on the external space side, The support is A base portion supporting the breathable membrane; a leg portion that is a portion for fixing the ventilation member to the opening of the housing and that extends from the base portion toward the internal space, The leg portion is The insertion start side is divided into several parts along the circumferential direction by slits, a plurality of insertion sections that are reversibly elastically deformed toward a central axis of the support and are inserted into and fixed to the opening; and a claw portion that protrudes toward an outer periphery from an end portion on an insertion start side of at least one of the plurality of insertion sections and is capable of being engaged with the housing, when a virtual circle that passes through both ends in a width direction of an inner surface of each of the plurality of insertion portions and has a center on the central axis is defined as a first virtual circle in a plane that is perpendicular to the central axis and passes through base portions of the plurality of insertion portions, each of the inner surfaces of the plurality of insertion portions has a protruding portion that protrudes toward the central axis further than the first virtual circle, A ratio of a radial length of the claw portion to an axial length of the insertion portion is 0.2 or more and 0.5 or less. Ventilation material.

2. A ventilation member that can be attached to a housing having an internal space that requires ventilation and an opening for ventilation, A support having an air hole as part of the ventilation path between the internal space and the external space; A ventilation membrane is disposed on the support so as to close the ventilation hole on the external space side, The support is A base portion supporting the breathable membrane; a leg portion that is a portion for fixing the ventilation member to the opening of the housing and that extends from the base portion toward the internal space, The leg portion is The insertion start side is divided into several parts along the circumferential direction by slits, a plurality of insertion sections that are reversibly elastically deformed toward a central axis of the support and are inserted into and fixed to the opening; and a claw portion that protrudes toward an outer periphery from an end portion on an insertion start side of at least one of the plurality of insertion sections and is capable of being engaged with the housing, when a virtual circle that passes through both ends in a width direction of an inner surface of each of the plurality of insertion portions and has a center on the central axis is defined as a first virtual circle in a plane that is perpendicular to the central axis and passes through base portions of the plurality of insertion portions, each of the inner surfaces of the plurality of insertion portions has a protruding portion that protrudes toward the central axis further than the first virtual circle, In the plane, the maximum radial length of the protruding portion is 0.1 mm or more and 1.5 mm or less. Ventilation material.

3. The radial length of the claw portion is 0.3 mm or more and 3.0 mm or less. The ventilation member according to claim 1 or 2.

4. In the process of inserting the plurality of insertion portions into the opening so that the central axis coincides with the central axis of the opening, the adjacent insertion portions do not come into contact with each other. The ventilation member according to claim 1 or 2.

5. In the plane, an inner surface of each of the plurality of insertion portions does not include a portion having a shape along the first imaginary circle. The ventilation member according to claim 1 or 2.

6. In the plane, the protruding portion includes a planar portion having a shape along a first imaginary straight line passing through both ends in a width direction of the inner surface of the insertion portion, The ventilation member according to claim 1 or 2.

7. In the plane, the protruding portion includes a recess that is recessed radially outward from a first imaginary straight line passing through both ends in a width direction of the inner surface of the insertion portion. The ventilation member according to claim 1 or 2.

8. The recess has a back surface portion having a shape along a virtual line parallel to the first virtual line. The ventilation member according to claim 7.

9. When a virtual circle having a center on the central axis and a diameter equal to or greater than the diameter of the first virtual circle is defined as a second virtual circle on the plane, each of the plurality of insertion portions is disposed such that an outer circumferential surface of the insertion portion is spaced apart from each other along the second virtual circle. The ventilation member according to claim 1 or 2.

10. a ratio of a circumferential length of the slit along the second virtual circle to a circumferential length of the insertion portion along the second virtual circle is 0.5 or more and 5 or less; The ventilation member according to claim 9.

11. The support body does not include any other member extending from the base portion toward the internal space other than the leg portion. The ventilation member according to claim 9.

12. the leg portion does not have the other member provided between the insertion portions adjacent to each other along the second imaginary circle; The ventilation member according to claim 11.

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