Ventilation member

Abstract

Provided is a ventilation member that is suitable for improving the ease of elastic deformation of an insertion part when the insertion part is inserted into an opening of a housing. This ventilation member (10) is provided with a support body (4a) and a ventilation membrane (2). The support body (4a) includes a base portion (11) and a leg portion (12) that support the ventilation membrane (2). The leg part (12) has a plurality of insertion parts (21) and claw parts (23). In a plane (A) orthogonal to the central axis (O) of the support body (4a) and passing through the root portion of the insertion part (21), when an imaginary circle passing through both end portions (21p) in the width direction of the inner surface (21c) of the insertion part (21) and centered on the central axis (O) is defined as a first imaginary circle (C1), the inner surface (21c) of the insertion part (21) has a protruding part (21d) that protrudes further toward the central axis (O) than the first imaginary circle (C1). The ratio of the length in the radial direction of the claw section (23) to the length in the axial direction of the insertion section (21) is from 0.3 to 0.5 (inclusive). In the plane (A), the maximum length of the protruding portion (21d) in the radial direction is 0.1 mm or more and 1.5 mm or less.

Description

Technical Field

[0001] This invention relates to a venting component installed in an opening of a housing. Background Technology

[0002] Openings are provided in the housings of automotive electrical components such as lights, inverters, converters, electronic control units (ECUs), battery packs, radars, and cameras, as well as various electronic devices used in homes, medical facilities, and offices, to mitigate pressure fluctuations within the housing or to allow for ventilation. Sometimes, ventilation components are installed at these openings. These ventilation components prevent the intrusion of water, dirt, and other contaminants into the housing and ensure airflow between the internal and external spaces.

[0003] For example, as disclosed in Patent Document 1 Figure 12 The ventilation component 110 is shown. Figure 12 In the diagram, (a) is a bottom view of the ventilation component 110, and (b) is a cross-sectional view (cc) of the ventilation component 110 shown in (a). The ventilation component 110 is fitted into the opening 151 of the housing 150 and includes a support body 104, a ventilation membrane 102 disposed on the support body 104, and a reinforcing member 106 stacked on the ventilation membrane 102. The support body 104 has a base portion 111 and legs 112 extending from the base portion 111. The insertion starting side of the legs 112 is divided into multiple portions circumferentially by slits 122, each having multiple insertion portions 121 that elastically deform inward to insert into the opening 151. Figure 12 As shown in (a), the inner and outer peripheral surfaces of the leg 112 (insertion portion 121) have the shape of an imaginary circle centered on the central axis X of the vent member 110. Each insertion portion 121 has a claw 123 protruding outwards at its front end. The claw 123 functions as a barb to prevent the leg 112 from disengaging from the opening 151 of the housing 150.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2004-047425 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] From the viewpoint of improving the ease with which the insert can be elastically deformed when it is inserted into the opening of the housing, the conventional venting component disclosed in Patent Document 1 has room for further study.

[0009] Therefore, the present invention provides a venting component suitable for improving the ease of elastic deformation of the insert when the insert is inserted into the opening of the housing.

[0010] Methods for solving problems

[0011] This invention provides a ventilation component that can be installed in a housing having an internal space requiring ventilation and a ventilation opening, wherein the ventilation component comprises: The support body has vents that form part of a ventilation path between the internal and external spaces; and A ventilated membrane is disposed on the support body such that the vent holes are closed on the external space side. The support body includes: The base portion supports the ventilated membrane; and The leg portion, which is used to secure the ventilation component to the opening of the housing, extends from the base portion toward the interior space side. The insertion point of the leg is divided into multiple circumferentially sections by slits. The leg has: a plurality of insertion portions that reversibly and elastically deform towards the central axis of the support body to insert into and be fixed to the opening; and a claw portion that protrudes from the end of at least one of the plurality of insertion portions on the insertion start side toward the outer periphery and can be locked onto the housing. In a plane orthogonal to the central axis and passing through the root portion of the plurality of insertion parts, when an imaginary circle passing through the two ends in the width direction of the inner surfaces of each of the plurality of insertion parts and centered on the central axis is defined as a first imaginary circle, the inner surfaces of each of the plurality of insertion parts have a protrusion extending toward the central axis than the first imaginary circle. The ratio of the radial length of the claw to the axial length of the insertion portion is 0.2 or more and 0.5 or less.

[0012] On another front, the present invention provides a ventilation component that can be installed in a housing having an internal space requiring ventilation and a ventilation opening, wherein the ventilation component comprises: The support body has vents that form part of a ventilation path between the internal and external spaces; and A ventilated membrane is disposed on the support body such that the vent holes are closed on the external space side. The support body includes: The base portion supports the ventilated membrane; and The leg portion, which is used to secure the ventilation component to the opening of the housing, extends from the base portion toward the interior space side. The insertion point of the leg is divided into multiple circumferentially sections by slits. The leg has: a plurality of insertion portions that reversibly and elastically deform towards the central axis of the support body to insert into and be fixed to the opening; and a claw portion that protrudes from the end of at least one of the plurality of insertion portions on the insertion start side toward the outer periphery and can be locked onto the housing. In a plane orthogonal to the central axis and passing through the root portion of the plurality of insertion parts, when an imaginary circle passing through the two ends in the width direction of the inner surfaces of each of the plurality of insertion parts and centered on the central axis is defined as a first imaginary circle, the inner surfaces of each of the plurality of insertion parts have a protrusion extending toward the central axis than the first imaginary circle. In the plane, the maximum radial length of the protrusion is more than 0.1 mm and less than 1.5 mm.

[0013] Invention Effects

[0014] The aforementioned ventilation component is adapted to improve the ease of elastic deformation of the insertion part when it is inserted into the opening of the housing. Attached Figure Description

[0015] Figure 1 This is an exploded perspective view showing an example of a ventilation component according to an embodiment of the present invention.

[0016] Figure 2A This is a longitudinal sectional view showing an example of a ventilation component according to an embodiment of the present invention.

[0017] Figure 2B yes Figure 2A A magnified view of a portion of the image.

[0018] Figure 3 This is a side view showing an example of the support body included in the ventilation component according to an embodiment of the present invention.

[0019] Figure 4A Therefore, it is equivalent to Figure 3 A three-dimensional view of the support structure cut off in a plane along line aa.

[0020] Figure 4B Therefore, it is equivalent to Figure 3 A cross-sectional view of the support body cut off by the plane of line aa.

[0021] Figure 4C yes Figure 4B A magnified view of a portion of the image.

[0022] Figure 5 This is a longitudinal sectional view illustrating the operation of the insertion part when the ventilation component of the embodiment of the present invention is installed into the opening of the housing. (a) shows the initial state of the insertion part, (b) shows the maximum deformation state of the insertion part, and (c) shows the installation state of the insertion part.

[0023] Figure 6A Therefore, it is equivalent to Figure 3 A perspective view of the support structure of the ventilation component in Example 1, which is a deformed form of aa line cut in plane.

[0024] Figure 6B Therefore, it is equivalent to Figure 3 A cross-sectional view of the support body of the ventilation component in the modified example 1, which is a plane cut of line aa.

[0025] Figure 6C yes Figure 6B A magnified view of a portion of the image.

[0026] Figure 7A Therefore, it is equivalent to Figure 3 A perspective view of the support structure of the ventilation component in Example 2, which is a deformed form of aa line cut in plane.

[0027] Figure 7B Therefore, it is equivalent to Figure 3 A cross-sectional view of the support body of the ventilation component in the modified example 2, which is a plane cut of line aa.

[0028] Figure 7C yes Figure 7B A magnified view of a portion of the image.

[0029] Figure 8A Therefore, it is equivalent to Figure 3 A perspective view of the support structure of the ventilation component in Example 3, which is a deformed form of aa line cut in plane.

[0030] Figure 8B Therefore, it is equivalent to Figure 3 A cross-sectional view of the support body of the ventilation component in the deformed example 3, which is a plane cut of line aa.

[0031] Figure 8C yes Figure 8B A magnified view of a portion of the image.

[0032] Figure 9A Therefore, it is equivalent to Figure 3 A perspective view of the support structure of the ventilation component in Example 4, which is a deformed form of aa line cut in plane.

[0033] Figure 9B Therefore, it is equivalent to Figure 3 A cross-sectional view of the support body of the ventilation component in the deformed example 4, which is a plane cut of line aa.

[0034] Figure 9C yes Figure 9B A magnified view of a portion of the image.

[0035] Figure 10A Therefore, it is equivalent to Figure 3A perspective view of the support structure of the ventilation component in Example 5, which is a deformed form of aa line cut in plane.

[0036] Figure 10B Therefore, it is equivalent to Figure 3 A cross-sectional view of the support body of the ventilation component in the deformed example 5, which is a plane cut of line aa.

[0037] Figure 10C yes Figure 10B A magnified view of a portion of the image.

[0038] Figure 11 This is a cross-sectional view showing an example of the ventilation membrane provided in the ventilation component according to an embodiment of the present invention.

[0039] Figure 12 These are bottom view (a) and cc section view (b) showing an example of a conventional ventilation component. Detailed Implementation

[0040] The ventilation component of the first aspect of the present invention can be installed in a housing having an internal space requiring ventilation and an opening for ventilation, wherein the ventilation component comprises: The support body has vents that form part of a ventilation path between the internal and external spaces; and A ventilated membrane is disposed on the support body such that the vent holes are closed on the external space side. The support body includes: The base portion supports the ventilated membrane; and The leg portion, which is used to secure the ventilation component to the opening of the housing, extends from the base portion toward the interior space side. The insertion point of the leg is divided into multiple circumferentially sections by slits. The leg has: a plurality of insertion portions that reversibly and elastically deform towards the central axis of the support body to insert into and be fixed to the opening; and a claw portion that protrudes from the end of at least one of the plurality of insertion portions on the insertion start side toward the outer periphery and can be locked onto the housing. In a plane orthogonal to the central axis and passing through the root portion of the plurality of insertion parts, when an imaginary circle passing through the two ends in the width direction of the inner surfaces of each of the plurality of insertion parts and centered on the central axis is defined as a first imaginary circle, the inner surfaces of each of the plurality of insertion parts have a protrusion extending toward the central axis than the first imaginary circle. The ratio of the radial length of the claw to the axial length of the insertion portion is 0.2 or more and 0.5 or less.

[0041] The second aspect of the present invention provides a ventilation component that can be installed in a housing having an internal space requiring ventilation and a ventilation opening, wherein the ventilation component comprises: The support body has vents that form part of a ventilation path between the internal and external spaces; and A ventilated membrane is disposed on the support body such that the vent holes are closed on the external space side. The support body includes: The base portion supports the ventilated membrane; and The leg portion, which is used to secure the ventilation component to the opening of the housing, extends from the base portion toward the interior space side. The insertion point of the leg is divided into multiple circumferentially sections by slits. The leg has: a plurality of insertion portions that reversibly and elastically deform towards the central axis of the support body to insert into and be fixed to the opening; and a claw portion that protrudes from the end of at least one of the plurality of insertion portions on the insertion start side toward the outer periphery and can be locked onto the housing. In a plane orthogonal to the central axis and passing through the root portion of the plurality of insertion parts, when an imaginary circle passing through the two ends in the width direction of the inner surfaces of each of the plurality of insertion parts and centered on the central axis is defined as a first imaginary circle, the inner surfaces of each of the plurality of insertion parts have a protrusion extending toward the central axis than the first imaginary circle. In the plane, the maximum radial length of the protrusion is more than 0.1 mm and less than 1.5 mm.

[0042] In a third aspect of the invention, for example, in the ventilation component of the first or second aspect, the radial length of the claw is 0.3 mm or more and 3.0 mm or less.

[0043] In the fourth aspect of the present invention, for example, in the ventilation component of any of the first to third aspects, during the process of inserting the plurality of inserts into the opening in such a manner that the central axis is aligned with the central axis of the opening, the inserts that are adjacent to each other do not contact each other.

[0044] In a fifth aspect of the invention, for example, in the ventilation component of any of the first to fourth aspects, the inner surface of each of the plurality of insertion portions in the plane does not include a portion having a shape along the first imaginary circle.

[0045] In the sixth aspect of the invention, for example, in the ventilation component of any of the first to fifth aspects, the protrusion in the plane includes a planar portion having the shape of a first imaginary straight line along the width direction of two ends passing through the inner side surface of the insertion portion.

[0046] In the seventh aspect of the invention, for example, in the ventilation component of any of the first to sixth aspects, the protrusion in the plane includes a recess that is recessed radially outward from the two ends of a first imaginary straight line in the width direction of the inner side surface of the insertion portion.

[0047] In the eighth aspect of the invention, for example, in the ventilation component of the seventh aspect, the recess has a back face portion having a shape along an imaginary straight line parallel to the first imaginary straight line.

[0048] In the ninth aspect of the present invention, for example, in the ventilation component of any of the first to eighth aspects, in the plane, when an imaginary circle having a diameter greater than or equal to the diameter of the first imaginary circle is defined as a second imaginary circle centered on the central axis, the plurality of insertion portions are arranged such that their outer peripheral surfaces are separated from each other along the second imaginary circle.

[0049] In the tenth aspect of the present invention, for example, in the ventilation component of the ninth aspect, the ratio of the circumferential length of the slit along the second imaginary circle to the circumferential length of the insertion portion along the second imaginary circle is 0.5 or more and 5 or less.

[0050] In the eleventh aspect of the present invention, for example, in the ventilation component of the ninth or tenth aspect, the support body does not include any other components extending from the base portion toward the interior space side, except for the legs.

[0051] In the twelfth aspect of the invention, for example, in the ventilation component of the eleventh aspect, the leg does not have the other components disposed between the insertion portions that are adjacent to each other along the second imaginary circle.

[0052] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The present invention is not limited to the following embodiments.

[0053] [Ventilation components]

[0054] like Figures 1-2A As shown, the ventilation component 10 of the embodiment of the present invention is installed at the opening 51 of the housing 50. As... Figure 2AAs shown, the opening 51 is a through hole connecting the internal space 52 and the external space 54 of the housing 50. The ventilation component 10 includes a ventilation membrane 2 and a support 4a. Both the ventilation membrane 2 and the support 4a have a circular shape when viewed from above. The ventilation membrane 2 and the support 4a share a common central axis O. The thickness direction of the ventilation membrane 2 is parallel to the central axis O. The support 4a has a ventilation hole 3 that forms part of the ventilation path between the internal space 52 and the external space 54. The ventilation membrane 2 is disposed on the support 4a such that the ventilation hole 3 is closed on the external space 54 side. Ventilation is possible between the internal space 52 and the external space 54 through the ventilation membrane 2. The housing 50 is, for example, the ECU (Electronic Control Unit) housing of an automobile. Figures 1-2A Only a portion of the housing 50 is shown in the image.

[0055] like Figure 2A As shown, the support body 4a has a base portion 11 and a leg portion 12. The base portion 11 supports the ventilation membrane 2 and has a generally disc-shaped form. The leg portion 12 is the portion used to fix the ventilation component 10 to the opening 51 of the housing 50. The leg portion 12 extends from the base portion 11 toward the interior space 52 of the housing 50.

[0056] Figure 3 This is a side view of the support 4a included in the ventilation component 10. (See attached image.) Figure 3 As shown, the insertion start side of the leg 12 is divided into multiple circumferentially by a slit 22. The leg 12 has: multiple insertion portions 21 that are reversibly elastically deformed toward the central axis O of the support body 4a to insert into and be fixed to the opening 51 of the housing 50; and claw portions 23 that protrude outwardly (opposite to the central axis O of the support body 4a) from the end 21b of at least one of the insertion portions 21 on the insertion start side, and are capable of locking onto the housing 50. The claw portions 23 function as barbs, thus preventing the leg 12 from dislodging from the opening 51 of the housing 50. Figure 2A As shown, the claw portion 23 has a side capable of engaging with the internal space 52 of the housing 50. Figure 2A The contact surface 23a is the surface that abuts against the surface of the housing 50 in the downward direction. The contact surface 23a may have a planar shape, for example. However, the contact surface 23a may also have an uneven shape. When the contact surface 23a has an uneven shape, the frictional force of the contact surface 23a relative to the surface of the housing 50's internal space 52 can be increased.

[0057] Equivalent to Figure 3 The plane of line aa is the plane A that is orthogonal to the central axis O of the support 4a and passes through the root portion 21a of the multiple insertion portions 21. Figure 4A This is a three-dimensional view of the support 4a cut off from plane A. Figure 4B This is a cross-sectional view of the support 4a cut by plane A. (Example) Figure 4BAs shown, in plane A, an imaginary circle centered on the central axis O and passing through the two ends 21p of the inner surface 21c of each of the plurality of insertion portions 21 in the width direction (circumferential direction) is defined as the first imaginary circle C1. In this embodiment, the inner surface 21c of each of the plurality of insertion portions 21 has an extension 21d that extends toward the central axis O from the first imaginary circle C1.

[0058] In the ventilation component 10 of this embodiment, each of the plurality of insertion portions 21 has an inner surface 21c that extends toward the central axis O from the first imaginary circle C1. Therefore, stress is easily dispersed when the insertion portion 21 is elastically deformed toward the central axis O and inserted into the opening 51. Thus, the ventilation component 10 of this embodiment is adapted to improve the ease of elastic deformation of the insertion portion 21 when it is inserted into the opening 51 of the housing 50.

[0059] exist Figure 12 In the conventional venting component 110 shown, the inner and outer peripheral surfaces of the leg portion 112 (insertion portion 121) have the shape of an imaginary circle centered on the central axis X of the venting component 110. The conventional venting component 110 does not have a protrusion that extends towards the central axis X from the imaginary circle centered on the central axis X. In the conventional venting component 110, the amount of reversible deformation towards the central axis X between the initial state and the maximum deformation state of the insertion portion 121 is typically about 1.3 mm. When the venting component 110 is installed into the opening 151 of the housing 150, for example, if the insertion portion 121 deforms towards the central axis X by more than 1.3 mm, sometimes the deformed insertion portion 121 cannot be restored, or cracks (crazing) occur on the inner peripheral surface of the root portion of the insertion portion 121. If the venting component 110 is kept in this state while assembled into the opening 151, the venting component 110 may easily detach from the housing 150. On the other hand, the venting member 10 of this embodiment has a protrusion 21d, which makes it easy to disperse stress when the insertion part 21 is elastically deformed toward the central axis O and inserted into the opening 51. Therefore, when the venting member 10 is installed into the opening 51 of the housing 50, it is possible to prevent the insertion part 21, which deforms toward the central axis O, from failing to recover or from cracking on the inner surface 21c of the root portion 21a of the insertion part 21.

[0060] In this embodiment, the ratio (L2 / L1) of the radial length L2 of the claw portion 23 to the axial length L1 of the insertion portion 21 is 0.2 or more and 0.5 or less. As described above, the venting member 10 of this embodiment is adapted to improve the ease of elastic deformation of the insertion portion 21 when it is inserted into the opening 51 of the housing 50. Therefore, in the venting member 10 of this embodiment, compared with... Figure 12Compared to the conventional venting member 110 shown, even if the ratio (L2 / L1) of the radial length L2 of the claw 23 to the axial length L1 of the insertion portion 21 is large, the claw 23 is less likely to obstruct the insertion portion 21 from being inserted into the opening 51. By increasing the radial length L2 of the claw 23 relative to the axial length L1 of the insertion portion 21, it is possible to further suppress the leg 12 from dislodging from the opening 51 of the housing 50.

[0061] Figure 2A The longitudinal sectional view and the equivalent Figure 4B The sectional view corresponding to the plane cut of the bb line. That is, Figure 2A The sectional view is a sectional view of the ventilator 10 cut by a plane in plane A that is perpendicular to a first imaginary straight line R1 passing through the width direction of the two ends 21p of the inner side 21c of an insertion part 21 and corresponding to a second imaginary straight line R2 passing through the central axis O. Figure 2B yes Figure 2A A magnified view of a portion of the document. In this specification, in... Figure 2B In this specification, the distance along the central axis O of the insertion portion 21 from the deepest part 22a of the slit 22 to the abutment surface 23a of the claw 23 is defined as the axial length L1 of the insertion portion 21. When the abutment surface 23a of the claw 23 has a concave-convex shape, the distance along the central axis O of the insertion portion 21 from the deepest part 22a of the slit 22 to the imaginary surface that connects with the protrusion of the abutment surface 23a of the claw 23 is considered as the axial length L1 of the insertion portion 21. Furthermore, in this specification, in... Figure 2B In this context, the radial distance from the outer peripheral surface 21f of the insertion part 21 to the outer peripheral surface 23f of the claw part 23 is defined as the radial length L2 of the claw part 23. It should be noted that in... Figures 2A-2B In the example shown, the radial length of the contact surface 23a is equivalent to the radial length L2 of the claw portion 23.

[0062] The lower limit of the ratio (L2 / L1) can be above 0.25. The upper limit of the ratio (L2 / L1) can be below 0.45, below 0.4, and further below 0.35.

[0063] For example, the axial length L1 of the insertion part 21 is 0.6 mm or more and 15.0 mm or less. The lower limit of the axial length L1 of the insertion part 21 can be 1.0 mm or more, 1.5 mm or more, or 2.0 mm or more. The upper limit of the axial length L1 of the insertion part 21 can be 12.0 mm or less, 10.0 mm or less, or 8.0 mm or less.

[0064] The radial length L2 of the claw portion 23 can be set according to the axial length L1 of the insertion portion 21. The radial length L2 of the claw portion 23 is preferably 0.3 mm or more and 3.0 mm or less. The lower limit of the radial length L2 of the claw portion 23 can be 0.4 mm or more, 0.5 mm or more, or 0.6 mm or more. The upper limit of the radial length L2 of the claw portion 23 can be 2.5 mm or less, 2.0 mm or less, or 1.5 mm or less.

[0065] On the other hand, in this embodiment, the maximum radial length L3 of the protrusion 21d is 0.1 mm or more and 1.5 mm or less. If the maximum radial length L3 of the protrusion 21d is within the above-mentioned range, the stress when the insertion part 21 is elastically deformed toward the central axis O and inserted into the opening 51 can be sufficiently dispersed.

[0066] Figure 4C yes Figure 4B A magnified view of a portion of the image. In this specification, as shown... Figure 4C As shown, in plane A, the maximum radial length of the first imaginary circle C1 and the inner side surface 21c of the insertion part 21 is defined as the maximum radial length L3 of the protrusion part 21d.

[0067] The lower limit of the maximum radial length L3 of the protrusion 21d can be 0.2 mm or more, or 0.3 mm or more. The upper limit of the maximum radial length L3 of the protrusion 21d can be 1.2 mm or less, or 1.0 mm or less.

[0068] like Figure 4C As shown, in this embodiment, the maximum radial length L3 of the protrusion 21d is the length along the second imaginary straight line R2. However, the maximum radial length L3 of the protrusion 21d is not limited to... Figure 4C The example shown. The maximum radial length L3 of the protrusion 21d can also be the length of an imaginary straight line in plane A that is not perpendicular to the first imaginary straight line R1 but passes through the central axis O.

[0069] Figure 5 This is a longitudinal sectional view illustrating the operation of the insertion part 21 when the venting component 10 is installed into the opening 51 of the housing 50. (a) shows the initial state of the insertion part 21, (b) shows the maximum deformation state of the insertion part 21, and (c) shows the installed state of the insertion part 21. Figure 5 The sectional view and equivalent to Figure 4B The sectional view corresponding to the plane cut of the bb line. That is, Figure 5The sectional view is a cross-sectional view of the venting component 10 cut by a plane in plane A that is perpendicular to a first imaginary straight line R1 passing through the width direction of the two ends 21p of the inner side 21c of an insertion portion 21 and corresponding to a second imaginary straight line R2 passing through the central axis O. Figure 5 For simplicity, the left half of the central axis O has been omitted. Figure 5 In (a), the radial position of the inner surface 21c closest to the central axis O is defined as the initial position P0 of the insertion part 21. Figure 5 In (b), the radial position of the inner surface 21c closest to the central axis O is defined as the maximum deformation position P of the insertion part 21. max .exist Figure 5 In (c), the radial position of the inner side surface 21c closest to the central axis O is defined as the installation position P1 of the insertion part 21.

[0070] In this instruction manual, such as Figure 5 As shown in (b), the initial position P0 of the insertion part 21 and the maximum deformation position P of the insertion part 21 are... max The radial distance between them is considered as the reversible deformation amount D between the initial state and the maximum deformation state of the insertion part 21. In this embodiment, the deformation amount D is preferably 1.2 mm or more and 2.5 mm or less in the radial direction of the venting member 10. The lower limit of the deformation amount D can be 1.5 mm or more, or 2.0 mm or more.

[0071] exist Figure 5 In the example shown, multiple insertion parts 21 are inserted into the opening 51 such that the central axis O of the support 4a coincides with the central axis of the opening 51. For example... Figure 5 As shown in (b), during insertion, the multiple insertion parts 21 elastically deform towards the central axis O. Figure 5 During the insertion process shown in (b), adjacent insertion portions 21 may not contact each other. With this structure, it is possible to suppress the reduction of the reversible deformation amount D between the initial state and the maximum deformation state of the insertion portion 21 caused by contact between adjacent insertion portions 21.

[0072] like Figure 3 As shown, the insertion part 21 is from the base part 11 toward the internal space 52 of the housing 50 ( Figure 3 The insertion portion 21 may also be formed such that its circumferential width extends from the root portion 21a toward the end 21b on the insertion start side. Figure 3 (In the downward direction) it narrows slightly. Depending on the shape of the insertion part 21, the slit 22 can also be formed with a circumferential width in the direction of... Figure 3 It narrows slightly at the top.

[0073] exist Figures 1-4BIn the example shown, the venting member 10 has three insertion portions 21. However, the number of insertion portions 21 in the venting member 10 is not limited. In this embodiment, the number of insertion portions 21 in the venting member 10 is, for example, 2 or more and 6 or less. The number of insertion portions 21 in the venting member 10 is preferably 3 or 4, more preferably 3. With such a structure, the insertion resistance to the opening 51 can be reduced, and on the other hand, the venting member 10 can be prevented from falling out of the opening 51, enabling stable fixation.

[0074] like Figure 4B As shown, in plane A, the inner surface 21c of each of the plurality of insertion portions 21 preferably does not include a portion having a shape along the first imaginary circle C1. With such a structure, the stress dispersion effect when the insertion portion 21 is elastically deformed toward the central axis O and inserted into the opening 51 can be improved.

[0075] like Figure 4C As shown, in plane A, the protrusion 21d preferably includes a planar portion 21e having a planar shape. The planar portion 21e preferably has a shape along a first imaginary straight line R1. With such a structure, the stress dispersion effect when the insertion portion 21 is elastically deformed toward the central axis O and inserted into the opening 51 can be improved.

[0076] like Figure 4C As shown, in this embodiment, the protrusion 21d includes a planar portion 21e having a shape along a first imaginary straight line R1. Figure 4C In the example shown, a planar portion 21e is a plane corresponding to the straight line connecting the two ends 21p of the inner side surface 21c of the insertion portion 21 in the width direction. However, the planar portion 21e included in the protrusion portion 21d is not limited to... Figure 4C The example shown. The protrusion 21d may also include two or more planar portions 21e having a shape along the first imaginary straight line R1.

[0077] like Figure 4B As shown, in plane A, an imaginary circle centered on the central axis O and having a diameter greater than or equal to the diameter of the first imaginary circle C1 is defined as the second imaginary circle C2. In this embodiment, it is preferable that the plurality of insertion portions 21 are arranged such that their outer peripheral surfaces 21f are separated from each other along the second imaginary circle C2. A slit 22 is formed between adjacent insertion portions 21.

[0078] like Figure 4B As shown, it is more preferable that the plurality of insertion portions 21 are arranged such that their outer peripheral surfaces 21f are equally separated from each other along the second imaginary circle C2. However, the plurality of insertion portions 21 may also be arranged such that their outer peripheral surfaces 21f are not equally separated from each other along the second imaginary circle C2.

[0079] like Figure 4BAs shown, the second imaginary circle C2 can also have a larger diameter than the first imaginary circle C1. In this case, as... Figure 4C As shown, in plane A, an end face 21g is formed between the end 21p in the width direction of the inner surface 21c of the insertion portion 21 and the end 21q in the width direction of the outer peripheral surface 21f. The end face 21g is a surface that is discontinuous with the inner surface 21c. In this embodiment, the claw portion 23 has an end face 23g, which is formed as a surface that is continuous with the end face 21g on the end 21b side of the insertion start side of the insertion portion 21.

[0080] In this embodiment, the difference between the diameter of the second imaginary circle C2 and the diameter of the first imaginary circle C1 is preferably 0 mm or more and 0.5 mm or less. It should be noted that... Figure 4C In the example shown, the difference between the diameter of the second imaginary circle C2 and the diameter of the first imaginary circle C1 is equivalent to the radial length of the end face 21g.

[0081] like Figure 4B As shown, multiple insertion portions 21 are arranged in the inner region of the second imaginary circle C2. The diameter of the second imaginary circle C2 is smaller than the diameter of the opening 51. When the venting member 10 is viewed from below along the central axis O, the multiple insertion portions 21 are arranged to surround the vent hole 3. The space surrounded by the multiple insertion portions 21 functions as a ventilation path between the inside and outside of the housing 50.

[0082] like Figure 4C As shown, in plane A, the ratio (L5 / L4) of the circumferential length L5 of the slit 22 along the second imaginary circle C2 to the circumferential length L4 of the insertion portion 21 along the second imaginary circle C2 is preferably 0.5 or more and 5 or less. With this structure, when the insertion portion 21 is elastically deformed towards the central axis O and inserted into the opening 51, adjacent insertion portions 21 are unlikely to come into contact. Therefore, it is possible to suppress the reduction of the reversible deformation amount D between the initial state and the maximum deformation state of the insertion portion 21 caused by contact between adjacent insertion portions 21.

[0083] The lower limit of (L5 / L4) can be above 1, above 1.5, above 2, above 2.5, and further above 3.

[0084] like Figure 4A As shown, in this embodiment, the shape of the root portion 21a of the insertion portion 21 and the shape of the end portion 21b from the root portion 21a to the insertion start side can also be the same. That is, the insertion portion 21 can also have a protruding portion 21d from the root portion 21a to the insertion start side end portion 21b. With such a structure, the stress dispersion effect when the insertion portion 21 is elastically deformed towards the central axis O and inserted into the opening portion 51 can be improved. However, the shape of the insertion portion 21 from the root portion 21a to the insertion start side end portion 21b is not limited to... Figure 4A The example shown. The shape of the root portion 21a of the insertion portion 21 may also be different from the shape of the end portion 21b from the root portion 21a to the insertion start side.

[0085] In this embodiment, the support 4a preferably does not include any other components extending from the base portion 11 toward the internal space 52, except for the leg portion 12. With this structure, it is possible to prevent the elastic deformation of the insertion portion 21 toward the central axis O from being hindered by other components.

[0086] Other components include, for example, a stop portion that overlaps with the central axis O, or a stop portion provided between adjacent insertion portions 21. The stop portion is a component that functions to limit the range of elastic deformation of the insertion portions 21 toward the central axis O. In this embodiment, the leg portion 12 preferably does not have other components (e.g., stop portions) provided between the insertion portions 21 that are adjacent to each other along the second imaginary circle C2.

[0087] like Figures 1-2A As shown, the ventilation component 10 of this embodiment also includes a cover component 6 and a sealing component 8. The cover component 6 has a circular shape when viewed from above. The ventilation membrane 2, the support body 4a, and the cover component 6 share a common central axis O.

[0088] The cover component 6 is installed on the support body 4a in a manner that covers the venting membrane 2. A space is formed between the venting membrane 2 and the cover component 6. A space is also formed between the outer periphery of the cover component 6 and the outer periphery of the support body 4a. These spaces also function as part of the ventilation path between the internal space 52 and the external space 54.

[0089] The sealing component 8 is an elastic component used to seal the gap between the support 4a and the housing 50 when the venting component 10 is installed on the housing 50. The sealing component 8 is an annular component installed around the opening 51 and filling the gap between the support 4a and the housing 50. The sealing component 8 is manufactured using elastomers such as nitrile rubber, ethylene-propylene rubber, silicone rubber, fluororubber, acrylic rubber, and hydrogenated nitrile rubber. Alternatively, the sealing component 8 can be manufactured from foam instead of an elastomer.

[0090] like Figure 5 As shown in (c), if the foot 12 of the support 4a is installed at the opening 51 of the housing 50, the support 4a is pushed back in the direction of being pulled out of the housing 50 by the elastic force of the sealing member 8 clamped between the support 4a and the housing 50. At this time, the claw 23 is locked onto the housing 50 on the side of the internal space 52 of the housing 50, thereby preventing the venting member 10 from falling off the housing 50. It should be noted that the part corresponding to the sealing member 8 can also be integrally provided to the support 4a by methods such as two-color molding or insert molding. In addition, the sealing member 8 can also be bonded to the support 4a.

[0091] As long as the ventilated membrane 2 has the property of allowing gas to pass through and preventing liquid from passing through, its structure and materials are not particularly limited. Figure 11 This is a cross-sectional view showing an example of a ventilation membrane 2. (e.g.) Figure 11 As shown, the ventilated membrane 2 may also have a membrane body 2a and a reinforcing member 2b overlapping the membrane body 2a. By providing the reinforcing member 2b, the strength of the ventilated membrane 2 is increased. The ventilated membrane 2 may also consist only of the membrane body 2a.

[0092] Oil-repellent or water-repellent treatments can be applied to the membrane substrate 2a. These liquid-repellent treatments can be performed by coating the membrane substrate 2a with a substance of low surface tension, followed by drying and curing. The liquid-repellent agent used in the liquid-repellent treatment is preferably capable of forming a film with a surface tension lower than that of the membrane substrate 2a; for example, a liquid-repellent agent containing a polymer with perfluoroalkyl groups is preferably used. The liquid-repellent agent is applied to the membrane substrate 2a by known methods such as impregnation or spraying.

[0093] In a typical example, the membrane body 2a is a porous membrane made of fluoropolymer or polyolefin. From the viewpoint of ensuring sufficient water resistance, a resin porous membrane with an average pore size of 0.01 μm to 10 μm is preferred.

[0094] Examples of suitable fluororesins for the membrane substrate 2a include polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, and tetrafluoroethylene-ethylene copolymer. Examples of suitable polyolefins for the membrane substrate 2a include polymers or copolymers of monomers such as ethylene, propylene, 4-methylpentene-1, and 1-butene. Nanofiber membrane porous bodies utilizing polyacrylonitrile, polyamide, or polylactic acid can also be used. Among these, PTFE is preferred because it can ensure high permeability with a small area and also has excellent ability to prevent foreign matter from entering the shell. PTFE porous membranes can be manufactured using known molding methods such as stretching and extraction methods.

[0095] The reinforcing member 2b can be a component made of resins such as polyester, polyethylene, or aramid. The shape of the reinforcing member 2b is not particularly limited as long as it maintains the breathability of the ventilated membrane 2; for example, it can be made of woven fabric, non-woven fabric, mesh, sponge, foam, or porous material. The membrane body 2a and the reinforcing member 2b can be bonded together by heat lamination, heat welding, ultrasonic welding, or adhesives.

[0096] Considering strength and / or ease of operation, the thickness of the ventilated membrane 2 is preferably in the range of 1 μm to 5 mm. The air permeability of the ventilated membrane 2, measured by the Gurley tester method specified in JISP 8117:2009, is preferably in the range of 0.1 to 300 sec / 100 cm. 3 The water pressure resistance of the ventilation membrane 2 is preferably above 1.0 kPa.

[0097] [Manufacturing method for ventilation components]

[0098] The ventilation component 10 of this embodiment described above can be manufactured, for example, by the following method.

[0099] First, the support body 4a and the cover component 6 are manufactured separately. The support body 4a and the cover component 6 can be manufactured using a known injection molding method. For example, thermoplastic resins can be used as materials for the support body 4a and the cover component 6. Examples of thermoplastic resins include polybutylene terephthalate, polyamide, and polyethylene terephthalate.

[0100] It should be noted that the housing 50 can be manufactured using a known injection molding method. For example... Figures 1-2A As shown, the opening diameter of the opening 51 on the external space 54 side is preferably larger than the opening diameter of the opening 51 on the internal space 52 side. With this structure, it is easy to insert the leg 12 into the opening 51 of the housing 50. Furthermore, with this structure, the cross-sectional area of ​​the ventilation path from the vent 3 to the internal space 52 can be ensured to be relatively large. Moreover, if the opening diameter of the opening 51 on the internal space 52 side is reduced, the leg 12 is arranged in an inclined manner relative to the central axis O. This is preferable in terms of reliably engaging the claw 23 with the opening 51, thereby improving the mounting strength of the ventilation component 10 to the housing 50.

[0101] This invention is not limited to the examples described in the above embodiments. For example, in this invention, the shape of the protrusion 21d of the inner surface 21c of each of the plurality of insertion portions 21 is not limited to... Figures 4A to 4C Examples are shown. The present invention can include variations that change the specific structure of the above embodiments. Hereinafter, variations 1 to 5 of the present invention will be described. It should be noted that, hereafter, the same reference numerals are sometimes used for elements identical to those in the above embodiments, and descriptions are omitted.

[0102] (Variation Example 1)

[0103] Figures 6A to 6C A modified example 1 of the ventilation component of this embodiment is shown. Figure 6A Therefore, it is equivalent to Figure 3 A perspective view of the support 4b of the ventilation component in the deformation example 1, which is cut off from the plane A of line aa. Figure 6B This is a cross-sectional view of the support 4b cut by plane A. Figure 6C yes Figure 6B A partial enlarged view. The support 4b of Modified Example 1, except that the second imaginary circle C2 has the same diameter as the first imaginary circle C1, has the same characteristics as described above. Figures 4A to 4C The structure is the same as that of the support 4a of the ventilation component 10 described.

[0104] The ventilation component of Modified Example 1 is similar to the ventilation component 10 described above, and is adapted to improve the ease of elastic deformation of the insertion part 21 when the insertion part 21 is inserted into the opening 51 of the housing 50.

[0105] like Figure 6B As shown, in the ventilation component of Modified Example 1, the difference between the diameter of the second imaginary circle C2 and the diameter of the first imaginary circle C1 is 0 mm. In this case, as... Figure 6C As shown, in plane A, the end 21p of the inner surface 21c of the insertion part 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.

[0106] (Variation Example 2)

[0107] Figures 7A to 7C A modified example 2 of the ventilation component of this embodiment is shown. Figure 7A Therefore, it is equivalent to Figure 3 A perspective view of the support 4c of the ventilation component in the deformation example 2, which is cut off from the plane A of line aa. Figure 7B This is a cross-sectional view of the support 4c cut by plane A. Figure 7C yes Figure 7B A partial enlarged view. The support 4c of Modified Example 2, except that the end face 21g of the insertion portion 21 is located circumferentially inside the end face 23g of the claw portion 23 in plane A, has the same characteristics as described above. Figures 4A to 4C The structure is the same as that of the support 4a of the ventilation component 10 described.

[0108] The ventilation component of Modified Example 2 is similar to the ventilation component 10 described above, and is adapted to improve the ease of elastic deformation of the insertion part 21 when the insertion part 21 is inserted into the opening 51 of the housing 50.

[0109] Furthermore, in the ventilation component of Modified Example 2, in plane A, the end face 21g of the insertion portion 21 is located circumferentially inside the end face 23g of the claw portion 23. Therefore, compared to the ventilation component of, for example, Modified Example 1, the area occupied by the insertion portion 21 can be reduced. Consequently, when the insertion portion 21 is inserted into the opening 51 of the housing 50, the insertion portion 21 is more easily elastically deformed.

[0110] like Figure 7CAs shown, in the ventilation component of Modified Example 2, in 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 circumferentially inward compared to the end face 23g of the claw portion 23. Therefore, in the ventilation component of Modified Example 2, the length of the end face 21g in plane A is greater than the length of the end face 21g in the ventilation component 10 described above. Furthermore, in plane A, the end 21p of the inner surface 21c of the insertion portion 21 is located circumferentially inward compared to the end face 23g of the claw portion 23. Therefore, in the ventilation component of Modified Example 2, the diameter of the first imaginary circle C1 is smaller than the diameter of the first imaginary circle C1 in the ventilation component 10 described above.

[0111] In the ventilation component of Modified Example 2, the end face 21g of the insertion start side of the insertion part 21 and the end face 23g of the claw part 23 are not continuous.

[0112] like Figure 7C As shown, in the ventilation component of Modified Example 2, in plane A, the two end faces 21g of the insertion part 21 in the width direction may also have shapes that are parallel to the third imaginary line R3 and the fourth imaginary line R4, respectively.

[0113] It should be noted that, although the illustration is omitted, the support body 4c of Modified Example 2 can be further deformed so that the second imaginary circle C2 has the same diameter as the first imaginary circle C1. That is, the support body 4b of Modified Example 1 and the support body 4c of Modified Example 2 can also be combined. In this case, there is no end face between end 21p and end 21q in plane A.

[0114] (Variation Example 3)

[0115] Figures 8A to 8C A variation 3 of the ventilation component of this embodiment is shown. Figure 8A Therefore, it is equivalent to Figure 3 A perspective view of the support 4d of the ventilation component in the deformed example 3, which is cut off from the plane A of line aa. Figure 8B This is a cross-sectional view of the support body 4d cut by plane A. Figure 8C yes Figure 8B A partially enlarged view. The support 4d of Modified Example 3, except that the protruding portion 21d in plane A includes a recess 21h that is radially outward from the first imaginary straight line R1, has the same characteristics as described above. Figures 6A to 6C The support 4b of the modified example 1 has the same structure.

[0116] The ventilation component of Modification 3 is the same as the ventilation component of Modification 1 described above, and is adapted to improve the ease of elastic deformation of the insertion part 21 when the insertion part 21 is inserted into the opening 51 of the housing 50.

[0117] Furthermore, for the ventilation component of modified example 3, in plane A, the protrusion 21d includes a recess 21h that is recessed radially outward from the first imaginary straight line R1, thereby making it easier to disperse stress when the insertion part 21 is elastically deformed toward the central axis O and inserted into the opening 51.

[0118] like Figure 8C As shown, in the ventilation component of Modified Example 3, the protrusion 21d includes two planar portions 21e having a shape along a first imaginary straight line R1. The recess 21h is located between the two planar portions 21e.

[0119] like Figure 8C As shown, in the ventilation component of Modified Example 3, the maximum radial length L3 of the protrusion 21d can be the length of a fifth imaginary straight line R5 in plane A that is not perpendicular to the first imaginary straight line R1 but passes through the central axis O.

[0120] like Figure 8C As shown, in the ventilation component of Modified Example 3, the recess 21h in plane A has a back surface portion 21i, which has a shape along a sixth imaginary line R6 parallel to the first imaginary line R1. With this structure, the overall flexibility of the insertion portion 21 is improved in the ventilation component of Modified Example 3, for example, compared to the ventilation component of Modified Example 1. Therefore, when the insertion portion 21 is elastically deformed towards the central axis O and inserted into the opening 51, the insertion portion 21 is easier to deform.

[0121] like Figure 8C As shown, in the ventilation component of Modified Example 3, in plane A, the recess 21h has two side surfaces 21j that define the recess 21h together with the back surface 21i and face each other in the circumferential direction. The two side surfaces 21j may also be surfaces parallel to the second imaginary line R2.

[0122] The radial length of the recess 21h in plane A can be appropriately set according to the radial length of the protrusion 21d.

[0123] It should be noted that, although the illustration is omitted, the support 4d of Modified Example 3 can be further deformed so that the second imaginary circle C2 has a diameter larger than that of the first imaginary circle C1. That is, the support 4a of the venting component 10 described above can also be combined with the support 4d of Modified Example 3. In this case, in plane A, an end face 21g is formed between the end 21p of the inner surface 21c of the insertion part 21 and the end 21q of the outer peripheral surface 21f.

[0124] (Variation Example 4)

[0125] Figures 9A to 9C A variation 4 of the ventilation component of this embodiment is shown. Figure 9A Therefore, it is equivalent to Figure 3 A perspective view of the support 4e of the ventilation component in the deformed example 4, which is cut off from the plane A of line aa. Figure 9B This is a cross-sectional view of the support 4e cut by plane A. Figure 9C yes Figure 9B A partially enlarged view. The support 4e of variant example 4, except that the protruding portion 21d in plane A includes a recess 21h that is radially outward from the first imaginary straight line R1, has the same characteristics as described above. Figure 4A The structure is the same as that of the support body 4a of the ventilation component 10 described in the figure 4C.

[0126] The ventilation component of Modification Example 4 is similar to the ventilation component 10 described above, and is adapted to improve the ease of elastic deformation of the insertion part 21 when the insertion part 21 is inserted into the opening 51 of the housing 50.

[0127] Furthermore, for the ventilation component of modified example 4, in plane A, the protrusion 21d includes a recess 21h that is recessed radially outward from the first imaginary straight line R1, thereby making it easier to disperse stress when the insertion part 21 is elastically deformed toward the central axis O and inserted into the opening 51.

[0128] like Figure 9C As shown, in the ventilation component of Modified Example 4, similarly to the ventilation component of Modified Example 3, the protrusion 21d includes two planar portions 21e having a shape along a first imaginary straight line R1. The recess 21h is located between the two planar portions 21e.

[0129] like Figure 9C As shown, in the ventilation component of Modified Example 4, similarly to the ventilation component of Modified Example 3, the maximum radial length L3 of the protrusion 21d can be the length of the fifth imaginary line R5 in plane A that is not perpendicular to the first imaginary line R1 but passes through the central axis O.

[0130] like Figure 9C As shown, in the ventilation component of Modified Example 4, the recess 21h in plane A has two inclined surfaces 21k that define the recess 21h and are circumferentially opposed. The inclined surfaces 21k are surfaces with a certain slope relative to the first imaginary straight line R1. With this structure, in the ventilation component of Modified Example 4, for example, compared with the ventilation component 10 described above, the overall flexibility of the insertion part 21 is improved. Therefore, when the insertion part 21 is elastically deformed towards the central axis O and inserted into the opening 51, the insertion part 21 is easier to deform.

[0131] like Figure 9C As shown, in the ventilation component of modified example 4, the recess 21h in plane A has a V-shape.

[0132] The radial length of the recess 21h in plane A can be appropriately set according to the radial length of the protrusion 21d.

[0133] It should be noted that, although the illustration is omitted, the support body 4e of Modified Example 4 can be further deformed so that the second imaginary circle C2 has the same diameter as the first imaginary circle C1. That is, the support body 4e of Modified Example 4 can also be combined with the support body 4c of Modified Example 2. In this case, there is no end face between end 21p and end 21q in plane A.

[0134] (Variation Example 5)

[0135] Figures 10A to 10C Example 5 shows a variation of the ventilation component of this embodiment. Figure 10A Therefore, it is equivalent to Figure 3 A perspective view of the support 4f of the ventilation component in the deformed example 5, which is cut off from the plane A of line aa. Figure 10B This is a cross-sectional view of the support 4f cut by plane A. Figure 10C yes Figure 10B A partial enlarged view. The support 4f of variant example 5, except that the recess 21h in plane A has a U-shape, has the same characteristics as described above. Figures 9A to 9C The support 4e of the modified example 4 has the same structure.

[0136] like Figure 10C As shown, in the ventilation component of Modified Example 5, the recess 21h has a U-shape in plane A. With such a structure, in the ventilation component of Modified Example 5, for example compared to the ventilation component of Modified Example 4 described above, stress is more easily dispersed when the insertion part 21 is elastically deformed toward the central axis O and inserted into the opening 51.

[0137] like Figure 10C As shown, in the ventilation component of Modified Example 5, similarly to the ventilation components of Modified Example 3 and Modified Example 4, the maximum radial length L3 of the protrusion 21d can be the length of the fifth imaginary line R5 in plane A that is not perpendicular to the first imaginary line R1 but passes through the central axis O.

[0138] The radial length of the recess 21h in plane A can be appropriately set according to the radial length of the protrusion 21d.

[0139] It should be noted that, although the illustration is omitted, the support body 4f of Modified Example 5 can be further deformed so that the second imaginary circle C2 has the same diameter as the first imaginary circle C1. That is, the support body 4f of Modified Example 5 can also be combined with the support body 4c of Modified Example 2. In this case, there is no end face between end 21p and end 21q in plane A.

[0140] (Other variations)

[0141] Although the illustration is omitted, for example, in plane A, the protrusion 21d may also include a convex portion that protrudes radially inward beyond the first imaginary straight line R1. With such a structure, the ease of elastic deformation of the insertion portion 21 when it is inserted into the opening 51 of the housing 50 can be improved. Furthermore, for example, in plane A, the protrusion 21d may also include a plurality of recesses 21h. Thus, for example, in plane A, the inner surface 21c of the insertion portion 21 may also have a wavy shape.

[0142] The examples above can be combined as long as they are not technically contradictory.

[0143] [Potential for Industrial Applications]

[0144] The ventilation component of the present invention can be used, for example, in the housings of automotive 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, and office use.

Claims

1. A ventilated component, installable in a housing having an internal space requiring ventilation and an opening for ventilation, wherein, The ventilation component includes: The support body has vents that form part of the ventilation path between the internal space and the external space; and A ventilated membrane is disposed on the support body such that the vent holes are closed on the external space side. The support body includes: The base portion supports the ventilation membrane; and The leg portion, which is used to secure the ventilation component to the opening of the housing, extends from the base portion toward the interior space side. The insertion point of the leg is divided into multiple circumferentially sections by slits. The leg has: a plurality of insertion portions that reversibly and elastically deform towards the central axis of the support body to insert into and be fixed to the opening; and a claw portion that protrudes from the end of at least one of the plurality of insertion portions on the insertion start side toward the outer periphery and can be locked onto the housing. In a plane orthogonal to the central axis and passing through the root portion of the plurality of insertion parts, when an imaginary circle passing through the two ends in the width direction of the inner surfaces of each of the plurality of insertion parts and centered on the central axis is defined as a first imaginary circle, the inner surfaces of each of the plurality of insertion parts have a protrusion extending toward the central axis than the first imaginary circle. The ratio of the radial length of the claw to the axial length of the insertion portion is 0.2 or more and 0.5 or less.

2. A ventilated component, capable of being installed in a housing having an internal space requiring ventilation and an opening for ventilation, wherein, The ventilation component includes: The support body has vents that form part of the ventilation path between the internal space and the external space; and A ventilated membrane is disposed on the support body such that the vent holes are closed on the external space side. The support body includes: The base portion supports the ventilation membrane; and The leg portion, which is used to secure the ventilation component to the opening of the housing, extends from the base portion toward the interior space side. The insertion point of the leg is divided into multiple circumferentially sections by slits. The leg has: a plurality of insertion portions that reversibly and elastically deform towards the central axis of the support body to insert into and be fixed to the opening; and a claw portion that protrudes from the end of at least one of the plurality of insertion portions on the insertion start side toward the outer periphery and can be locked onto the housing. In a plane orthogonal to the central axis and passing through the root portion of the plurality of insertion parts, when an imaginary circle passing through the two ends in the width direction of the inner surfaces of each of the plurality of insertion parts and centered on the central axis is defined as a first imaginary circle, the inner surfaces of each of the plurality of insertion parts have a protrusion extending toward the central axis than the first imaginary circle. In the plane, the maximum radial length of the protrusion is more than 0.1 mm and less than 1.5 mm.

3. The ventilation component according to claim 1 or 2, wherein, The radial length of the claw is more than 0.3 mm and less than 3.0 mm.

4. The ventilation component according to claim 1 or 2, wherein, During the process of inserting the plurality of insert parts into the opening in such a manner that the central axis is aligned with the central axis of the opening, the insert parts that are adjacent to each other do not come into contact.

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

6. The ventilation component according to claim 1 or 2, wherein, In the plane, the protrusion includes a planar portion having the shape of a first imaginary straight line along the width direction of two ends passing through the inner side surface of the insertion portion.

7. The ventilation component according to claim 1 or 2, wherein, In the plane, the protrusion includes a recess that is recessed radially outward from the two ends of the insertion portion in the width direction by a first imaginary straight line.

8. The ventilation component according to claim 7, wherein, The recess has a back side portion, which has a shape along an imaginary straight line parallel to the first imaginary straight line.

9. The ventilation component according to claim 1 or 2, wherein, In the plane, when an imaginary circle centered on the central axis and having a diameter greater than or equal to that of the first imaginary circle is defined as the second imaginary circle, the plurality of insertion portions are arranged such that their outer circumferential surfaces are separated from each other along the second imaginary circle.

10. The ventilation component according to claim 9, wherein, The ratio of the circumferential length of the slit along the second imaginary circle to the circumferential length of the insertion portion along the second imaginary circle is more than 0.5 and less than 5.

11. The ventilation component according to claim 9, wherein, The support body, apart from the legs, does not include any other components extending from the base toward the interior space.

12. The ventilation component according to claim 11, wherein, The leg does not have the other components disposed between the insertion portions that are adjacent to each other along the second imaginary circle.

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