Ventilation structure

Abstract

A ventilation structure (3a) is provided with a housing (2a) and a ventilation member (1a). The housing (2a) has at least one stopper (22) that protrudes from the outer surface (2s) of the housing (2a) and that is positioned in the circumferential direction of an air vent (21) that connects an inner space (2u) and an outer space (2v) of the housing (2a). A ventilation member (1a) is provided with: a cylindrical inner member (10a) that is attached to a ventilation port (21) and has a through-hole as a ventilation path between an inner space (2u) and an outer space (2v); and an outer member (30a) that is attached to the outer peripheral section (12b) of the inner member (10a) and covers the opening of the through-hole. In a plan view with respect to the outer surface (2s) of the housing (2a), the base end (22a) of the stopper (22) does not overlap the ventilation member (1a), and at least a portion of the stopper (22) overlaps the ventilation member (1a).

Description

Technical Field

[0001] This invention relates to ventilation structures, and more particularly to ventilation structures having a housing and ventilation components. Background Technology

[0002] In the housings of automotive electrical components such as lights, transducers, converters, electronic control units (ECUs), battery packs, radars, and cameras, as well as various electronic devices used in homes, medical facilities, and offices, ventilation structures are sometimes formed to ensure ventilation between the internal and external spaces of the housing and to prevent the intrusion of foreign objects into the housing. These ventilation structures typically have a venting component fixed to an opening in the housing. These ventilation structures prevent the intrusion of water, dirt, and other contaminants into the housing and mitigate pressure fluctuations within the housing due to temperature changes.

[0003] For example, Patent Document 1 describes a ventilation structure comprising a housing and a ventilation component fixed to the housing. The ventilation component comprises an inner member, a ventilation membrane, and an outer member. The housing and the ventilation component are fixed by being inserted into the opening of the inner member through the protrusion of the housing, and the inner peripheral surface of the inner member abuts against the outer peripheral surface of the protrusion.

[0004] For example, Patent Document 2 describes a ventilation structure comprising a housing and a ventilator fixed to the housing. The ventilator comprises an inner member, a ventilator membrane, and an outer member. The housing and the ventilator are fixed by being inserted into the opening of the inner member through the protrusion of the housing, and the inner peripheral surface of the inner member abuts against the outer peripheral surface of the protrusion.

[0005] For example, Patent Document 3 describes a ventilation structure comprising a housing and a ventilation member fixed to an opening in the housing. The ventilation member includes a ventilation membrane and a support body, the support body having a support portion for supporting the ventilation membrane and an insertion portion for insertion into the opening. The insertion portion includes multiple legs formed on the insertion initiation side. Each leg has a locking portion with its outer periphery machined into a tapered shape at its insertion initiation side end. When the insertion portion of the ventilation member is inserted into the opening of the housing, the locking portion is pressed by the opening, and the multiple legs flex inward, thus reducing the insertion pressure of the ventilation member relative to the housing. When the locking portion is released from the pressure through the opening, it locks against the inner surface of the housing, thereby fixing the ventilation member to the housing.

[0006] Prior art literature

[0007] Patent Document 1: International Publication No. 2021 / 145383

[0008] Patent Document 2: International Publication No. 2020 / 075857

[0009] Patent Document 3: Japanese Patent Application Publication No. 2004-47425 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] The ventilation structure with a housing and ventilation component described in Patent Documents 1-3 is open to further study from the viewpoint of preventing the ventilation component installed on the housing from detaching from the ventilation port.

[0012] Therefore, the present invention provides a ventilation structure suitable for preventing the ventilation component installed in the vent of the housing from detaching from the vent.

[0013] Solution for solving the problem

[0014] The inventors conducted in-depth research and found that the above-mentioned objective can be achieved by providing a stop that restricts the movement of the ventilation component installed at the vent in the direction of disengagement from the vent.

[0015] This invention provides a ventilated structure comprising a shell and ventilated components. The aforementioned housing has at least one stop portion located circumferentially on a vent that connects the internal space of the housing to the external space, and protruding from the outer surface of the housing. The above-mentioned ventilation components include: A cylindrical internal component is installed at the aforementioned vent and has a through hole serving as a ventilation path between the aforementioned internal space and the aforementioned external space; and An external component is installed on the outer periphery of the internal component and covers the opening of the through hole. When viewed from above with reference to the outer surface of the housing, the base end of the stop portion does not overlap with the ventilation component, but at least a portion of the stop portion overlaps with the ventilation component.

[0016] Invention Effects

[0017] The above-described ventilation structure is adapted to prevent the ventilation components installed in the vent of the housing from detaching from the vent. Attached Figure Description

[0018] Figure 1A This is a cross-sectional view schematically illustrating an example of the ventilation structure of the present invention.

[0019] Figure 1B It is a schematic representation Figure 1A A top view of the ventilation structure.

[0020] Figure 2A This is a cross-sectional view schematically illustrating another example of the ventilation structure of the present invention.

[0021] Figure 2B It is a schematic representation Figure 2AA top view of the ventilation structure.

[0022] Figure 3A Yes Figure 1A The figure illustrates an example of a method for manufacturing a ventilated structure.

[0023] Figure 3B Yes Figure 1A The figure illustrates an example of a method for manufacturing a ventilated structure.

[0024] Figure 4A This is a cross-sectional view schematically illustrating a modified example 1 of the ventilation structure of the present invention.

[0025] Figure 4B It is a schematic representation Figure 4A A top view of the ventilation structure.

[0026] Figure 5A This is a cross-sectional view schematically illustrating a modified example 2 of the ventilation structure of the present invention.

[0027] Figure 5B It is a schematic representation Figure 5A A top view of the ventilation structure.

[0028] Figure 6A This is a cross-sectional view schematically illustrating a modified example 3 of the ventilation structure of the present invention.

[0029] Figure 6B It is a schematic representation Figure 6A A top view of the ventilation structure.

[0030] Figure 7A This is a cross-sectional view schematically illustrating a modified example 4 of the ventilation structure of the present invention.

[0031] Figure 7B It is a schematic representation Figure 7A A top view of the ventilation structure. Detailed Implementation

[0032] The first embodiment of the present invention has a ventilation structure comprising a housing and a ventilation component. The aforementioned housing has at least one stop portion located circumferentially on a vent that connects the internal space of the housing to the external space, and protruding from the outer surface of the housing. The above-mentioned ventilation components include: A cylindrical internal component is installed at the aforementioned vent and has a through hole serving as a ventilation path between the aforementioned internal space and the aforementioned external space; and An external component is installed on the outer periphery of the internal component and covers the opening of the through hole. When viewed from above with reference to the outer surface of the housing, the base end of the stop portion does not overlap with the ventilation component, but at least a portion of the stop portion overlaps with the ventilation component.

[0033] In a second aspect of the present invention, for example, based on the ventilation structure of the first aspect, the front end of the stop portion overlaps with the ventilation component under the above-mentioned top view.

[0034] In a third aspect of the present invention, for example, based on the ventilation structure of the first or second aspect, the stop portion restricts the movement of the ventilation component installed at the ventilation port in the direction of disengaging from the ventilation port.

[0035] In the fourth aspect of the present invention, for example, based on the ventilation structure of any of the first to third aspects, when viewed from the side with the outer surface of the housing as a reference, the maximum length in the vertical direction between the lower surface of the ventilation component installed at the ventilation port and the upper surface of the edge of the ventilation port is greater than the maximum length in the vertical direction between the upper surface of the ventilation component installed at the ventilation port and the lower surface of the stop portion.

[0036] In the fifth aspect of the present invention, for example, based on the ventilation structure of any of the first to fourth aspects, the ventilation component further includes a ventilation membrane installed in a manner that seals the opening of the through hole.

[0037] In the sixth aspect of the present invention, for example, based on the ventilation structure of the fifth aspect, the at least one stop portion satisfies at least one condition selected from the group consisting of (i) and (ii) below. (i) After the venting component is installed in the vent, the stop portion is formed by tilting, bending, or bending the pre-stop portion protruding from the outer surface of the housing toward the edge of the vent. When viewed from the side with the outer surface of the housing as a reference, the pre-stop portion has a vertical length greater than the maximum vertical length between the outer surface and the upper surface of the venting component. (ii) After the above-mentioned ventilation component is installed in the above-mentioned ventilation port, the above-mentioned stop portion is formed by fixing the above-mentioned stop portion to the above-mentioned outer surface of the above-mentioned housing.

[0038] In the seventh aspect of the present invention, for example, based on the ventilation structure of the fifth aspect, when the above (i) is satisfied, the pre-stop portion has a thin-walled portion and a thick-walled portion, and the thick-walled portion has a thickness greater than the thickness of the thin-walled portion.

[0039] In the eighth aspect of the present invention, for example, in the ventilation structure of any of the first to seventh aspects, the at least one stop portion includes a plurality of stop portions located along the circumferential direction of the ventilation opening.

[0040] 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.

[0041] [Ventilation Structure]

[0042] An example of the ventilation structure of this embodiment is shown below. Figures 1A-1B . Figure 1A Therefore Figure 1B The IA-IA line in the diagram is a cross-sectional view of the cut line. Figure 1B yes Figure 1A Top view. Figures 1A-1B The ventilated structure 3a shown includes a ventilated component 1a and a housing 2a. The housing 2a has at least one stop 22, which is located circumferentially above the opening 21 that connects the internal space 2u of the housing 2a to the external space 2v, and protrudes from the outer surface 2s of the housing 2a. The ventilated component 1a includes an inner member 10a and an outer member 30a. The inner member 10a is mounted on the vent 21. The inner member 10a is cylindrical and has a through hole as a ventilation path between the internal space 2u and the external space 2v. The outer member 30a is mounted on the outer periphery 12b of the inner member 10a and covers the opening 13 on one side of the through hole of the inner member 10a.

[0043] The housing 2a has a cylindrical protrusion 2p projecting towards the edge 2f of the vent 21. For example... Figure 1A As shown, the ventilation component 1a is inserted into the interior of the interior component 10a through the opening 14 on the other side of the interior component 10a via the protrusion 2p, and is fixed to the protrusion 2p of the housing 2a in a state where the inner peripheral portion 12a of the interior component 10a elastically deforms and forms a contact portion 6c with the outer peripheral portion 2q of the protrusion 2p. Thus, a ventilation structure 3a is provided.

[0044] The structure of the housing 2a and the ventilation component 1a will be described in further detail below.

[0045] like Figure 1A As shown, the stop portion 22 of the housing 2a has a base end portion 22a located on the side near the outer surface 2s of the housing 2a and a front end portion 22b located on the side away from the outer surface 2s. The base end portion 22a can be integrated with the outer surface 2s or fixed to the outer surface 2s. Figures 1A-1B In the example shown, the base end portion 22a is integrated with the outer surface 2s. That is, the stop portion 22 is pre-formed on the outer surface 2s of the housing 2a. The stop portion 22 is formed as a cantilever with the base end portion 22a as the fixed end and the front end portion 22b as the free end.

[0046] like Figure 1B As shown, in a top view with the outer surface 2s of the housing 2a as a reference, the base end 22a of the stop 22 does not overlap with the vent member 1a, and at least a portion of the stop 22 overlaps with the vent member 1a. According to the vent structure 3a having such a configuration, even if the vent member 1a installed at the vent 21 is subjected to force in a direction of detachment from the vent 21, the stop 22 can prevent the vent member 1a from detaching from the vent 21.

[0047] In other words, the stop 22 restricts the movement of the ventilation component 1a installed on the vent 21 in the direction of disengaging from the vent 21.

[0048] In this specification, the direction in which the venting component 1a detaches from the vent 21 refers to a side view taken with reference to the outer surface 2s of the housing 2a (see reference). Figure 1A (The direction from below to above)

[0049] like Figure 1B As shown, when viewed from above with the outer surface 2s of the housing 2a as a reference, the front end portion 22b of the stop portion 22 can also overlap with the venting component 1a. The front end portion 22b of the stop portion 22 can also restrict the movement of the venting component 1a installed on the vent 21 in the direction of disengaging from the vent 21.

[0050] like Figure 1A As shown, in a side view with the outer surface 2s of the housing 2a as a reference, the maximum vertical length h1 between the lower surface 11f of the vent member 1a installed in the vent 21 and the upper surface 21f of the edge 2f of the vent 21 is preferably greater than the maximum vertical length h2 between the upper surface 11e of the vent member 1a installed in the vent 21 and the lower surface 22f of the stop portion 22. That is, it is preferable that h1 > h2. With this configuration, it is possible to further suppress the vent member 1a installed in the vent 21 of the housing 2a from detaching from the vent 21. In addition, in Figures 1A-1B In the ventilation structure 3a shown, the upper surface 21f of the edge 2f of the vent 21 corresponds to the upper surface of the protrusion 2p that protrudes in a cylindrical shape toward the edge 2f of the vent 21.

[0051] In this specification, the horizontal direction refers to the direction parallel to the outer surface 2s when the outer surface 2s of the housing 2a is set as a horizontal plane. The vertical direction refers to the direction perpendicular to the outer surface 2s when the outer surface 2s of the housing 2a is set as a horizontal plane.

[0052] The maximum length h2 is not specifically limited. The maximum length h2 can be set appropriately based on the maximum length h1.

[0053] The lower surface 11f of the ventilation component 1a installed at the vent 21 may or may not contact the outer surface 2s of the housing 2a. Figures 1A-1B In the ventilation structure 3a shown, the lower surface 11f of the ventilation component 1a installed at the ventilation port 21 is in contact with the outer surface 2s of the housing 2a.

[0054] The stop 22 may have a structure that is inclined, bent or curved toward the edge 2f of the vent 21.

[0055] exist Figures 1A-1B In the venting configuration 3a shown, the stop portion 22 has a structure that bends toward the edge 2f of the vent 21. In this case, the stop portion 22 may also include a leg portion 22c and an arm portion 22d. The leg portion 22c extends along a first direction D1 from the outer surface 2s of the housing 2a toward the external space 2v. The arm portion 22d extends in the external space 2v along a second direction D2 toward the edge 2f of the vent 21. The leg portion 22c may include a base end portion 22a. The arm portion 22d may include a front end portion 22b.

[0056] In a side view with the outer surface 2s of the housing 2a as a reference, the tilt angle θ1 of the first direction D1 relative to the outer surface 2s of the housing 2a can be in the range of 30° to 90°. However, in this specification, the tilt angle θ1 refers to the minimum angle between the outer surface 2s of the housing 2a and the first direction D1. The tilt angle θ1 can be in the range of 45° to 90°, or it can be in the range of 60° to 90°. Figure 1A As shown, the first direction D1 can also be a direction perpendicular to the outer surface 2s of the shell 2a.

[0057] In a side view with reference to the outer surface 2s of the housing 2a, the tilt angle θ2 of the second direction D2 relative to the outer surface 2s of the housing 2a can be in the range of 0° to 45°. However, in this specification, the tilt angle θ2 refers to the minimum angle between the outer surface 2s of the housing 2a and the second direction D2. The tilt angle θ2 can be in the range of 0° to 30°, or in the range of 0° to 15°. Figure 1A As shown, the second direction D2 can also be a direction parallel to the outer surface 2s of the shell 2a.

[0058] Another example of the ventilation structure of this embodiment is shown in Figures 2A-2B . Figure 2A Therefore Figure 2B The IIA-IIA line in the diagram is a cross-sectional view of the cut line. Figure 2B yes Figure 2A Top view. Figures 2A-2B The ventilated structure 3b shown has the same characteristics as the housing except for the shape of the stop portion 22. Figures 1A-1BThe ventilation structure shown in 3a has the same structure. Figures 2A-2B In this drawing, the same reference numerals are used for elements that are the same as those in ventilation structure 3a, and descriptions are omitted.

[0059] Figures 2A-2B The ventilated structure 3b shown includes a ventilated component 1a and a housing 2b. In the housing 2b, a stop portion 22 has a structure that slopes towards the edge 2f of the vent 21. In this case, the stop portion 22 may also be composed of a leg 22e extending in a third direction D3 from the outer surface 2s of the housing 2b toward the external space 2v. The leg 22e may include a base end portion 22a and a front end portion 22b.

[0060] In a side view with the outer surface 2s of the housing 2b as a reference, the tilt angle θ3 of the third direction D3 relative to the outer surface 2s of the housing 2b can be in the range of 30° to 75°. However, in this specification, the tilt angle θ3 refers to the minimum angle between the outer surface 2s of the housing 2b and the third direction D3. The tilt angle θ3 can also be in the range of 30° to 60°. Figure 2A As shown, the tilt angle θ3 can also be in the range of 45° to 60°.

[0061] As long as, when viewed from above with the outer surface 2s of the housing 2b as a reference, the base end 22a of the stop 22 does not overlap with the venting member 1a, and at least a portion of the stop 22 overlaps with the venting member 1a, the shape of the stop 22 is not limited to... Figures 1A-1B and Figures 2A-2B The shape shown. For example, the stop 22 may also have a structure that curves toward the edge 2f of the vent 21.

[0062] exist Figures 1A-1B The example shown is a ventilation structure 3a with two stop portions 22. However, the ventilation structure of this embodiment only needs to have at least one stop portion 22.

[0063] like Figures 1A-1B As shown, multiple stops 22 may also be located circumferentially along the vent 21. That is, at least one stop 22 may include multiple stops 22. By having multiple stops 22, the venting member 1a mounted on the vent 21 of the housing 2a can be further prevented from detaching from the vent 21.

[0064] The plurality of stop portions 22 are preferably positioned at equal intervals along the circumference of the vent 21. With this configuration, even if the venting member 1a installed on the vent 21 is subjected to force in the direction of disengagement from the vent 21, the plurality of stop portions 22 positioned at equal intervals can further prevent the venting member 1a from disengaging from the vent 21.

[0065] like Figures 1A-1B As shown, the housing 2a may also have two stops 22. In this case, when viewed from above with reference to the outer surface 2s of the housing 2a, the two stops 22 are preferably positioned facing each other in the axial direction of the internal member 10a. With such a configuration, it is possible to further prevent the venting member 1a from detaching from the vent 21.

[0066] The number of stop portions 22 in the housing 2a is not limited to Figures 1A-1B The example shown. The housing 2a may have a single stop 22 or more than three stopes 22.

[0067] The thickness T22 of the stop portion 22 is not particularly limited. In this specification, if... Figure 1A As shown, the thickness T22 of the stop portion 22 refers to the thickness of the stop portion 22 as viewed from the side with reference to the outer surface 2s of the housing 2a. The thickness T22 can be appropriately set, for example, according to the size of the venting component 1a. The thickness T22 may also differ between the base end portion 22a and the front end portion 22b. For example, the thickness T22 may decrease as it moves from the base end portion 22a closer to the front end portion 22b.

[0068] The width W22 of the stop portion 22 is not particularly limited. In this specification, as... Figure 1A As shown, the width W22 of the stop portion 22 refers to the width of the stop portion 22 as viewed from above with reference to the outer surface 2s of the housing 2a. The width W22 can be appropriately set, for example, according to the size of the venting component 1a. The width W22 may also differ between the base end portion 22a and the front end portion 22b. For example, the width W22 may decrease as it moves closer to the front end portion 22b from the base end portion 22a.

[0069] As for the material of the housing 2a, general materials can be used. For example, when the housing 2a is cast, iron, aluminum alloy, copper, brass, etc., can be used as the material. For example, when the housing 2a is forged, iron, aluminum alloy, etc., can be used as the material. For example, when the housing 2a is injection molded, polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polycarbonate (PC), modified polyphenylene ether (m·PPE), nylon 6 (PA6), nylon 66 (PA66), polyacetal (POM), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyphthalamide (PPA), liquid crystal polymer (LCP), polyetherimide (PEI), polyamide imide (PAI), polyetheretherketone (PEEK), etc. From the viewpoint of ensuring the strength and rigidity of the stop part 22, it is preferable not to use an elastomer as the material of the housing 2a.

[0070] The inner member 10a of the venting component 1a comprises an elastic material and has an open tube structure. In other words, the inner member 10a is formed as a tube with openings at both ends. The outer member 30a has a closed tube structure. In other words, the outer member 30a is formed as a tube with an opening only on one side at both ends. The inner member 10a is fixed to the outer member 30a when the inner member 10a is inserted into the interior of the outer member 30a and a portion of the outer peripheral portion 12b of the inner member 10a elastically deforms to form a contact portion 6d with a portion of the inner peripheral portion 31a of the outer member 30a. The inner diameter of the outer member 30a is larger than the outer diameter of the inner member 10a between the contact portion 6d and the opening 14 in the axial direction of the inner member 10a.

[0071] like Figure 1A As shown, the closed-tube structure of the external member 30a has a sidewall 31 and a bottom wall 32. The sidewall 31 extends along the axis X along the center of the vent 21 passing through the housing 2a. The bottom wall 32 extends in a direction perpendicular to the axis X. A corner is formed by the intersection of the bottom wall 32 and the sidewall 31.

[0072] In this embodiment, the ventilation component 1a further includes a ventilation membrane 20a installed in such a way as to seal the opening of the through hole of the internal component 10a. The ventilation membrane 20a covers the opening 13 of the internal component 10a.

[0073] Typically, the ventilation membrane 20a is covered by a bottom wall 32. The bottom wall 32 is disposed separately from the ventilation membrane 20a, for example, in the axial direction of the ventilation component 1a. Therefore, a space 36 is formed between the bottom wall 32 and the ventilation membrane 20a.

[0074] Multiple openings (not shown) are formed on the side of the outer member 30a. In the ventilation structure 3a, ventilation between the inside and outside of the housing 2a is ensured through the vent 21 on the inside of the protrusion 2p of the housing 2a, the opening 13 of the inner member 10a, the ventilation membrane 20a, the space 36, and the multiple openings of the outer member 30a.

[0075] As for the construction of the ventilation component 1a, the ventilation component described in Patent Document 1 can be referenced, for example.

[0076] [Manufacturing method of ventilated structure]

[0077] Next, refer to Figures 3A-3B The manufacturing method of the ventilation structure of this embodiment described above will be explained. Figures 3A-3B Yes Figures 1A-1B The figure illustrates an example of the manufacturing method of the ventilation structure 3a shown.

[0078] The ventilation structure 3a can be formed by tilting, bending or bending the pre-stop portion 22p protruding from the outer surface 2s of the housing 2a toward the edge 2f of the ventilation port 21 after the ventilation component 1a is installed on the ventilation port 21.

[0079] like Figure 3A As shown, in a side view with reference to the outer surface 2s of the housing 2a, the pre-stop portion 22p has a vertical length H2 that is greater than the maximum vertical length H1 between the outer surface 2s of the housing 2a and the upper surface 11e of the venting component 1a.

[0080] The pre-stop portion 22p can also extend along the fourth direction D4 from the outer surface 2s of the housing 2a toward the external space 2v.

[0081] In a side view with the outer surface 2s of the housing 2a as a reference, the tilt angle θ4 of the fourth direction D4 relative to the outer surface 2s of the housing 2a can be in the range of 30° to 90°. However, in this specification, the tilt angle θ4 refers to the minimum angle between the outer surface 2s of the housing 2a and the fourth direction D4. The tilt angle θ4 can be in the range of 45° to 90°, or it can be in the range of 60° to 90°. Figure 3A As shown, the fourth direction D4 can also be a direction perpendicular to the outer surface 2s of the shell 2a.

[0082] like Figure 3A As shown, the pre-stop portion 22p may also have a thin-walled portion 22q and a thick-walled portion 22r having a thickness greater than that of the thin-walled portion 22q. In this specification, as... Figure 3A As shown, the thickness of the pre-stop portion 22p refers to the thickness viewed from the side with reference to the outer surface 2s of the housing 2a. With this construction, the pre-stop portion 22p can easily buckle or bend towards the edge 2f of the vent 21 with the thin-walled portion 22q as the boundary. Therefore, the venting structure 3a can be easily achieved.

[0083] The shape of the thin-walled portion 22q is not particularly limited. For example... Figure 3A As shown, the thin-walled portion 22q can also be formed from a recess 22u on the side of the vent 21 formed in the pre-stop portion 22p.

[0084] The recess 22u can be formed, for example, by performing an additional machining process in the housing 2a formed using a mold to form a groove at a predetermined position of the pre-stop portion 22p.

[0085] like Figure 3A As shown, first, the venting component 1a is installed at the vent 21 of the housing 2a. Then, the pre-stopping part 22p is tilted, bent, or bent toward the edge 2f of the vent 21. Figure 3BAs shown, the pre-stop portion 22p can also be bent toward the edge 2f of the vent 21. Figure 3B In the example shown, the pre-stop portion 22p is bent toward the edge 2f of the vent 21, with the recess 22u as the boundary. This forms a shape as shown. Figure 1A The stop part 22 is shown.

[0086] For example, the pre-stop portion 22p can be inclined toward the edge 2f of the vent 21, with the base end portion 22pa of the pre-stop portion 22p as the boundary. This forms a shape like... Figure 2A The stop part 22 is shown.

[0087] This invention is not limited to the embodiments described above. For example, the invention may include variations that modify the specific structure of the embodiments described above. Variations of the invention are shown below. Furthermore, in the following description, the same reference numerals are used for elements identical to those in the embodiments described above, and descriptions are omitted.

[0088] (Variation Example 1)

[0089] A variation of the ventilation structure of this embodiment, Example 1, is presented in... Figures 4A-4B As shown in the image. Figure 4A Therefore Figure 4B The IVA-IA line in the diagram is a cross-sectional view of the cut line. Figure 4B yes Figure 4A Top view. Figures 4A-4B The ventilated structure 3c shown has the following characteristics: The stop portion 22 of the housing is formed by fixing the stop portion 22 to the outer surface 2s of the housing after the vent member 1a is installed on the vent port 21. Figures 1A-1B The ventilation structure shown in 3a has the same structure.

[0090] Figures 4A-4B The ventilation structure 3c shown includes a ventilation component 1a and a housing 2c. In the ventilation structure 3c, a stop portion 22 is not pre-formed on the outer surface 2s of the housing 2c. The stop portion 22 is formed by fixing the ventilation component 1a to the outer surface 2s of the housing 2c after it is installed in the vent 21. With this configuration, the movement of the ventilation component 1a installed in the vent 21 in the direction of disengagement from the vent 21 can also be restricted by the stop portion 22.

[0091] The method of fixing the stop 22 to the outer surface 2s of the housing 2c is not particularly limited. The stop 22 can also be fixed by brazing the base end 22a of the stop 22 to the outer surface 2s of the housing 2c. In this case, such as Figures 4A-4B As shown, the ventilation structure 3c may have a solder portion 4c between the base end 22a of the stop portion 22 and the outer surface 2s of the housing 2c.

[0092] The material for the stop portion 22 in the ventilated structure 3c can be the same as the material of the housing 2a described above. From the viewpoint of ensuring the strength and rigidity of the stop portion 22, it is preferable not to use an elastomer as the material for the stop portion 22.

[0093] (Variation Example 2)

[0094] A variation of the ventilation structure of this embodiment, in Example 2... Figures 5A-5B As shown in the image. Figure 5A Therefore Figure 5B The VA-VA line in the diagram is a cross-sectional view of the cut line. Figure 5B yes Figure 5A Top view. Figures 5A-5B The ventilation structure 3d shown, except that the stop portion 22 of the housing is fixed by screwing the base end portion 22k of the stop portion 22 to the outer surface 2s of the housing, has the same... Figures 4A-4B The ventilation structure shown in 3c has the same structure.

[0095] Figures 5A-5B The ventilated structure 3d shown includes a ventilated component 1a and a housing 2d. In the ventilated structure 3d, the stop portion 22 is a threaded member having a head 22i and a shaft portion 22j. The diameter of the head 22i is larger than the diameter of the shaft portion 22j. The base end portion 22k of the shaft portion 22j has an external thread structure.

[0096] In the ventilation structure 3d, a recess 2t is pre-formed on the outer surface 2s of the housing 2d. This recess 2t has an internal thread structure that can engage with the external thread structure of the base end portion 22k of the stop portion 22. By engaging the base end portion 22k of the stop portion 22 with the recess 2t formed on the outer surface 2s of the housing 2d, the stop portion 22 is fixed to the outer surface 2s of the housing 2d.

[0097] In the ventilated structure 3d, when viewed from above with the outer surface 2s of the housing 2d as a reference, the base end 22k of the threaded member serving as the stop 22 does not overlap with the ventilated component 1a, but at least a portion of the threaded member serving as the stop 22 overlaps with the ventilated component 1a. Figure 5B In the example shown, part of the head 22i of the threaded member that serves as the stop 22 overlaps with the vent member 1a. With this configuration, the stop 22 can also restrict the movement of the vent member 1a, which is installed on the vent 21, in the direction of disengagement from the vent 21.

[0098] The dimensions of the threaded member serving as the stop 22 can be appropriately set according to the dimensions of the venting component 1a, etc. At the head 22i of the threaded member serving as the stop 22, a engaging portion 22m may also be formed, capable of engaging with a tool used to mount the threaded member onto the outer surface 2s of the housing 2d. The shape of the engaging portion 22m is not particularly limited. The engaging portion 22m can be, for example, a cross-shaped hole or a hexagonal hole. Figure 5B In the example shown, the engaging part 22m is a cross-shaped hole.

[0099] The threaded component of the stop part 22 in the venting structure 3d can be made of common materials. For example, iron, brass, stainless steel, aluminum, titanium, etc., can be used as the material for the threaded component. When the threaded component is injection molded, materials such as PP, PE, PET, PC, m·PPE, PA6, PA66, POM, PBT, PPS, PPA, LCP, PEI, PAI, PEEK, etc., can also be used as the material for the threaded component. For rust prevention, surface treatments such as electroplating can also be applied to the threaded component.

[0100] (Variation Example 3)

[0101] Modification 3 of the ventilation structure of this embodiment is shown in Figures 6A-6B As shown in the image. Figure 6A Therefore Figure 6B The VIA-VIA line in the diagram is a cross-sectional view of the cut line. Figure 6B yes Figure 6A Top view. Figures 6A-6B The ventilation structure 3e shown, in addition to having a ventilation component 1b instead of a ventilation component 1a, has the same... Figures 1A-1B The ventilation structure shown in 3a has the same structure.

[0102] Figures 6A-6B The ventilated structure 3e shown includes a ventilated component 1b and a housing 2a. The ventilated component 1b includes an inner component 10b and an outer component 30b. The inner component 10b is mounted on a vent 21. The inner component 10b is cylindrical and has a through hole as a ventilation path between the inner space 2u and the outer space 2v. The outer component 30b is mounted on the outer periphery 12b of the inner component 10b and covers the opening 13 on one side of the through hole of the inner component 10b.

[0103] like Figure 6A As shown, the ventilation component 1b is inserted into the interior of the interior component 10b through the opening 14 on the other side of the interior component 10b via the protrusion 2p, and the inner peripheral portion 12a of the interior component 10b abuts against the outer peripheral portion 2q of the protrusion 2p and is fixed to the protrusion 2p of the housing 2a. Thus, a ventilation structure 3e is provided.

[0104] The inner member 10b is a cylindrical body with openings at both ends. The inner member 10b has an open tube structure with openings at both ends. The outer member 30b is a bottomed cylindrical body. The outer member 30b has a closed tube structure with an opening at one end and a closed end at the other end.

[0105] like Figure 6A As shown, the closed-tube structure of the outer member 30b has a sidewall 31 and a bottom wall 32. The sidewall 31 extends along the axis X. The bottom wall 32 extends in a direction perpendicular to the axis X. A corner is formed by the intersection of the bottom wall 32 and the sidewall 31.

[0106] The ventilation component 1b also includes a ventilation membrane 20b installed in such a way as to seal the opening of the through hole of the internal component 10b. The ventilation membrane 20b covers the opening 13 of the internal component 10b.

[0107] Typically, the ventilated membrane 20b is covered by a bottom wall 32. The bottom wall 32 is disposed separately from the ventilated membrane 20b, for example, in the axial direction of the ventilated component 1b. Therefore, a space 36a is formed between the bottom wall 32 and the ventilated membrane 20b.

[0108] The outer member 30b engages with the inner member 10b when the inner member 10b is inserted into the inner side of the outer member 30b from the end side where the ventilated membrane 20b is disposed. Here, the inner side of the outer member 30b refers to the space surrounded by the opening and inner periphery 12a of the outer member 30b. The outer member 30b functions as a cover member that protects the ventilated membrane 20b from foreign objects such as dust or water that fly in from the outside by covering the ventilated membrane 20b.

[0109] The ventilation component 1b has a space 36b between the inner periphery 31a of the outer component 30b which engages with the inner component 10b and the outer periphery 12b of the inner component 10b.

[0110] In the ventilation structure 3e, ventilation between the inside and outside of the housing 2a is ensured through the vent 21 inside the protrusion 2p of the housing 2a, the opening 13 of the internal component 10b, the ventilation membrane 20b, the space 36a, and the space 36b.

[0111] like Figure 6A As shown, in a side view with the outer surface 2s of the housing 2a as a reference, the maximum vertical length h1 between the lower surface 11f of the vent member 1b installed in the vent 21 and the upper surface 21f of the edge 2f of the vent 21 is preferably greater than the maximum vertical length h2 between the upper surface 11e of the vent member 1b installed in the vent 21 and the lower surface 22f of the stop portion 22. That is, it is preferable that h1 > h2. With this configuration, it is possible to further suppress the vent member 1b installed in the vent 21 of the housing 2a from detaching from the vent 21. In addition, in Figures 6A-6B In the ventilation structure 3e shown, the upper surface 21f of the edge 2f of the vent 21 corresponds to the upper surface of the protrusion 2p that protrudes in a cylindrical shape toward the edge 2f of the vent 21.

[0112] In the ventilation configuration 3e, the maximum length h2 is not specifically limited. The maximum length h2 can be appropriately set based on the maximum length h1.

[0113] exist Figures 6A-6B In the ventilation structure 3e shown, the lower surface 11f of the ventilation component 1b installed at the ventilation port 21 does not contact the outer surface 2s of the housing 2a.

[0114] The construction of the ventilation component 1b can be, for example, referred to the ventilation assembly described in Patent Document 2.

[0115] exist Figures 6A-6B In the example shown, the ventilation structure 3e has the same characteristics as... Figures 1A-1B The ventilation structure 3a shown uses the same shell 2a as the shell, but the construction of the shell in the ventilation structure 3e is not limited to this. For example, the ventilation structure 3e may also use one of the shells 2b, 2c and 2d described above as the shell.

[0116] (Variation Example 4)

[0117] Modification 4 of the ventilation structure of this embodiment is shown in Figures 7A-7B As shown in the image. Figure 7A Therefore Figure 7B The VIIA-VIIA line in the diagram is a cross-sectional view of the cut line. Figure 7B yes Figure 7A Top view. Figures 7A-7B The ventilation structure 3f shown includes a housing 2e replacing the housing 2a, and a ventilation component 1c replacing the ventilation component 1a. In addition, it has... Figures 1A-1B The ventilation structure shown in 3a has the same structure.

[0118] Figures 7A-7B The venting structure 3f shown includes a venting component 1c and a housing 2e. The housing 2e has a cylindrical protrusion at its edge 2f that does not have a vent 21 that connects the internal space 2u of the housing 2e to the external space 2v. Figures 1A-1B The venting structure 3a shown differs from the housing 2a. The stop portion 22 of the housing 2b has the same structure as the stop portion 22 of the housing 2a. The venting component 1c includes an inner component 10c and an outer component 30c. The inner component 10c is mounted on the vent 21. The inner component 10c is cylindrical and has a through hole as a ventilation path between the inner space 2u and the outer space 2v. The outer component 30c is mounted on the outer periphery of the inner component 10c and covers the opening of the through hole of the inner component 10c.

[0119] The internal component 10c includes a support portion 15a capable of supporting the ventilation membrane 20c described later, and an insertion portion 15b formed on one side of the support portion 15a.

[0120] The insertion portion 15b of the internal component 10c is cylindrical with a diameter approximately the same as the vent 21 of the housing 2e. The insertion portion 15b is divided into multiple sections along its circumferential direction, at least on the insertion start side. The insertion portion 15b includes at least a plurality of legs 15c formed on the insertion start side, with slits formed between adjacent legs 15c. Each of the legs 15c includes a locking portion 15d with its outer periphery machined into a tapered shape at its insertion start side end.

[0121] like Figure 7A As shown, when the insertion portion 15b of the venting component 1c is inserted into the vent 21 of the frame 2e, the locking portion 15d is pressed by the vent 21, and the multiple legs 15c flex inward, thus reducing the insertion pressure of the venting component 1c relative to the frame 2e. When the locking portion 15d is released from the pressure after passing through the vent 21, it locks onto the inner surface of the housing 2e. In this way, the venting component 1c is fixed to the housing 2e. Thus, a venting structure 3f is provided.

[0122] The ventilation component 1c also includes a ventilation membrane 20c supported on the support portion 15a in a manner that seals the opening of the through hole of the internal component 10c. The ventilation membrane 20c is fixed to the support portion 15a in a manner that covers the through hole of the internal component 10c.

[0123] Typically, the ventilated membrane 20c is covered by an external member 30c. The bottom wall 32 of the external member 30c is disposed separately from the ventilated membrane 20c, for example, in the axial direction of the ventilated component 1c. Therefore, a space 36 is formed between the bottom wall 32 and the ventilated membrane 20c.

[0124] Multiple openings (not shown) are formed on the side of the outer member 30c. In the ventilation structure 3f, ventilation between the inside and outside of the housing 2e is ensured through the vent 21 of the housing 2e, the through hole of the inner member 10c, the ventilation membrane 20c, the space 36, and the multiple openings of the outer member 30c.

[0125] like Figure 7A As shown, by providing a sealing portion 5f on the surface of the support portion 15a of the internal member 10c opposite to the housing 2e, the tightness and / or airtightness between the housing 2e and the venting component 1c can be improved. In particular, when the support portion 15a and the insertion portion 15b of the internal member 10c are made of a thermoplastic resin other than an elastomer, it is preferable to form a sealing portion 5f to improve the airtightness.

[0126] like Figure 7AAs shown, preferably, in a side view with the outer surface 2s of the housing 2e as a reference, the maximum vertical length h1 between the lower surface 11f of the vent member 1c installed in the vent 21 and the upper surface 21f of the edge 2f of the vent 21 is greater than the maximum vertical length h2 between the upper surface 11e of the vent member 1c installed in the vent 21 and the lower surface 22f of the stop 22. That is, it is preferable that h1 > h2. With this configuration, it is possible to further suppress the vent member 1c installed in the vent 21 of the housing 2e from detaching from the vent 21. In addition, Figures 7A-7B The ventilation structure 3f shown does not have a protrusion that extends in a cylindrical shape toward the edge 2f of the vent 21, so the upper surface 21f of the edge 2f of the vent 21 corresponds to the outer surface 2s.

[0127] In the ventilation structure 3f, the maximum length h2 is not specifically limited. The maximum length h2 can be appropriately set according to the maximum length h1.

[0128] like Figure 7A As shown, the maximum vertical length h3 between the lower surface 11f of the vent member 1c installed in the vent 21 and the upper surface 11e of the vent member 1c installed in the vent 21 is preferably greater than the maximum vertical length h4 between the upper surface 21f of the edge 2f of the vent 21 and the lower surface 22f of the stop portion 22. That is, it is preferable that h3 > h4. With this configuration, it is possible to further prevent the vent member 1c installed in the vent 21 of the housing 2e from detaching from the vent 21.

[0129] In the ventilation structure 3f, the maximum length h4 is not specifically limited. The maximum length h4 can be appropriately set based on the maximum length h3.

[0130] In the ventilation structure 3f, it is preferable to satisfy either h1>h2 or h3>h4. When both h1>h2 and h3>h4 are satisfied, the ventilation component 1c installed in the vent 21 of the housing 2e can be further prevented from detaching from the vent 21.

[0131] exist Figures 7A-7B In the ventilation structure 3f shown, the lower surface 11f of the ventilation component 1c installed at the ventilation port 21 does not contact the outer surface 2s of the housing 2e. The lower surface 11f of the ventilation component 1c is located in the internal space 2u of the housing 2e.

[0132] As for the construction of the ventilation component 1c, the ventilation component described in Patent Document 3 can be referenced, for example.

[0133] exist Figures 7A-7B In the example shown, the ventilated structure 3f serves as a shell and possesses the same... Figures 1A-1BThe ventilated structure 3a shown has the same stop portion 22 as the housing 2a, but the structure of the stop portion provided by the ventilated structure 3f is not limited to this. For example, the ventilated structure 3f may also have one of the stop portions 22 of the housings 2b, 2c and 2d described above as a stop portion.

[0134] The examples above can be combined as long as they are not technically contradictory.

[0135] Industrial applicability

[0136] According to the present invention, a ventilated structure with excellent durability against foreign objects such as water and dirt from the outside can be formed.

Claims

1. A ventilated structure comprising a shell and ventilated components, The housing has at least one stop located circumferentially to a vent that connects the interior space of the housing to the exterior space, and protrudes from the outer surface of the housing. The ventilation component includes: A cylindrical internal component is installed at the vent and has a through hole serving as a ventilation path between the internal space and the external space; and An external component is installed on the outer periphery of the internal component and covers the opening of the through hole. When viewed from above with reference to the outer surface of the housing, the base end of the stop does not overlap with the venting component, but at least a portion of the stop overlaps with the venting component.

2. The ventilation structure according to claim 1, wherein, From the top view, the front end of the stop overlaps with the ventilation component.

3. The ventilation structure according to claim 1, wherein, The stop restricts the movement of the venting component installed at the vent in the direction of disengagement from the vent.

4. The ventilation structure according to claim 1, wherein, When viewed from the side with the outer surface of the housing as a reference, the maximum length in the vertical direction between the lower surface of the venting component installed at the vent and the upper surface of the edge of the vent is greater than the maximum length in the vertical direction between the upper surface of the venting component installed at the vent and the lower surface of the stop.

5. The ventilation structure according to claim 1, wherein, The ventilation component also includes a ventilation membrane installed in a manner that seals the opening of the through hole.

6. The ventilation structure according to claim 1, wherein, The at least one stop satisfies at least one condition selected from the group consisting of (i) and (ii) below. (i) After the venting component is installed on the vent, the stop is formed by tilting, bending, or bending a pre-stop portion protruding from the outer surface of the housing toward the edge of the vent. In a side view with reference to the outer surface of the housing, the pre-stop portion has a vertical length greater than the maximum vertical length between the outer surface and the upper surface of the venting component. (ii) After the venting component is installed at the vent, the stop is formed by fixing the stop to the outer surface of the housing.

7. The ventilation structure according to claim 6, wherein, When the above (i) is satisfied, The pre-stop portion has a thin-walled portion and a thick-walled portion, and the thick-walled portion has a thickness greater than that of the thin-walled portion.

8. The ventilation structure according to claim 1, wherein, The at least one stop includes multiple stop portions. The plurality of stops are located along the circumferential direction of the vent.

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