Nitto-denko Corporation

Rohm Co., Ltd.

Ulvac, Inc.

Youzou Yano

Kou Uemura

Tomoyuki Kasagi

Yusuke Nakayama

Daisuke Kitagawa

Akio Suzuki

Teppei Tezuka

Shunsuke Noumi

Kouji Furuuchi

Masaya Yano

Kyoko Ishii

Akira Miyagaki

Takumi Takahashi

Satoshi Nishiyama

Kazuhiro Omura

Eizou Kawano

Takashi Tagou

Yoshiki Ikeyama

Masatoshi Suzuki

Atsushi Daimon

Kenichi Nishikawa

Eizo Kawano

Toshimasa Nishimori

Takashi Tago

Tiago Ogawa

Yuuta Shimazaki

Yuuki Sugou

Masahiko Takeuchi

A ventilation componentincludes a ventilation pathfor allowing ventilation between an inner spaceand an outer spaceof a housing. The ventilation pathis a path for allowing ventilation between the internal spaceand the outer spacewhen the ventilation componentis attached to an edge. The ventilation componentincludes a supporting portion, a gas-permeable membrane, a protruding portion, and a sealing member. The supporting portionsurrounds the ventilation path. The gas-permeable membraneis bonded to the supporting portionand closes the ventilation pathin a ventilatable manner. The protruding portionis a part having a tubular shape, the part being arranged to protrude from the supporting portionand surround one end of the ventilation path, the part being configured to be in contact with the edgewhen the ventilation componentis attached to the edge. The ventilation componentsatisfies a requirement 0.7≤D/W≤1.3.

Ventilation component

A ventilation assembly of the present disclosure includes: an internal member being a tubular body having an opening at a first end portion and an opening at a second end portion; a gas-permeable membrane covering the opening at the first end portion of the internal member; and an external member being a tubular body having a bottom, the external member being joined to the internal member with the internal member inserted in the interior of the external member from the first end portion side, wherein the ventilation assembly is to be fixed to the projection of the housing with the projection inserted in the opening at the second end portion of the internal member to make an inner peripheral surface of the internal member and an outer peripheral surface of the projection abut each other, the ventilation assembly has a second space serving as a ventilation path connecting the gas-permeable membrane and the outside of the ventilation assembly in at least one selected from the inside of the internal member, the inside of the external member, and an interspace between the internal member and the external member joined together, and a total length of a height of the internal member and a shortest length in the second space from an outer periphery of the internal member at the first end portion to an end portion of the ventilation path on the outside side is 6.0 mm or more and 20 mm or less. The ventilation assembly of the present disclosure is excellent in moisture permeation performance.

Ventilation assembly and ventilation housing

A ventilation structure (a) includes a housing () and a ventilation component (). The housing () has a first surface () defining a lateral surface of a columnar space () in an attachment hole (). The ventilation component () is attached to the housing () to close the attachment hole (). The ventilation component () has a ventilation path () between an inner space () of the housing () and an outer space () of the housing (). The ventilation component () includes a supporting portion (), a gas-permeable membrane (), a protruding portion (), and a sealing member (). The supporting portion () surrounds the ventilation path () in plan view. The protruding portion () protrudes from the supporting portion () toward the inner space () of the housing (), and is inserted into the attachment hole (). The sealing member () is disposed on an outer periphery of the protruding portion (), and seals a gap between the first surface () and the protruding portion ().

Ventilation structure

A ventilation housing of the present disclosure includes: a housing; and a ventilation assembly. The housing includes a tubular projection extending to project from an outer surface and internally having a first space communicating the inside and the outside of the housing. The ventilation assembly includes: an internal member being a tubular body having an opening at a first end portion and an opening at a second end portion; a gas-permeable membrane covering the opening at the first end portion of the internal member; and an external member being a tubular body having a bottom, the external member being joined to the internal member with the internal member inserted in the interior of the external member from the first end portion side. The ventilation assembly is fixed to the projection with the projection inserted in the opening at the second end portion of the internal member to make an inner peripheral surface of the internal member and an outer peripheral surface of the projection abut each other. The ventilation assembly has a second space serving as a ventilation path connecting the gas-permeable membrane and the outside of the ventilation assembly in the inside of the internal member, the inside of the external member, and/or an interspace between the two members. A ratio between an area Sof a cross-section of the first space and a smallest total area Sdetermined by comparison of values of different total areas determined at different distances from the gas-permeable membrane, the total areas each being determined for a cross-section(s) of the second space, is 1.0 or more. A ratio between the area Sand a total area Sof a plane consisting of a cross-section(s) of the second space taken at a position(s) where the second space is the narrowest is more than 1.0. This ventilation housing exhibits excellent performance in terms of moisture permeation between the inside and the outside of the housing.

Ventilation housing

A ventilation componentincludes a ventilation pathfor allowing ventilation between an inner spaceand an outer spaceof a housing. The ventilation pathis a path for allowing ventilation between the internal spaceand the outer spacewhen the ventilation componentis attached to an edge. The ventilation componentincludes a supporting portion, a gas-permeable membrane, a protruding portion, and a sealing member. The supporting portionsurrounds the ventilation path. The gas-permeable membraneis bonded to the supporting portionand closes the ventilation pathin a ventilatable manner. The protruding portionis a part having a tubular shape, the part being arranged to protrude from the supporting portionand surround one end of the ventilation path, the part being configured to be in contact with the edgewhen the ventilation componentis attached to the edge. The ventilation componentsatisfies requirements 2.5≤Gs/Gt≤5.0 and 1.0≤{(Gs−Gt)/2}/Lt≤3.0.

A ventilation component () includes a supporting portion (), a gas-permeable membrane (), and a sealing member (). The supporting portion () has a ventilation path () and an annular surface (). When the ventilation component () is attached to a housing (), the ventilation path () extends in a direction perpendicular to an opening plane of an opening (), and extends through the supporting portion (). The annular surface () faces an outer surface () of the housing (), and surrounds the ventilation path () in plan view. The gas-permeable membrane () closes the ventilation path () in a ventilatable manner. The gas-permeable membrane () allows a gas to pass therethrough in a thickness direction of the gas-permeable membrane (). The sealing member () is sandwiched between the outer surface () of the housing () and the annular surface () to seal a gap between the outer surface () of the housing () and the annular surface (). The sealing member () includes at least one selected from the group consisting of a pressure-sensitive adhesive, an adhesive, and a cured product of an adhesive.

A ventilation assembly of the present disclosure includes: an internal member being a tubular body having an opening at a first end portion and an opening at a second end portion; an external member being a tubular body having a bottom; and a gas-permeable membrane covering the opening at the first end portion of the internal member, wherein the external member is joined to the internal member with the internal member inserted in the interior of the external member from the first end portion side, the ventilation assembly has a second space serving as a ventilation path connecting the gas-permeable membrane and the outside of the ventilation assembly in at least one selected from the inside of the internal member, the inside of the external member, and an interspace between the internal member and the external member joined together, and the internal member includes one first projecting portion or two or more first projecting portions projecting from the inner peripheral surface at a position on the second end portion side with respect to the gas-permeable membrane. The ventilation assembly of the present disclosure can prevent the gas-permeable membrane from being damaged at the time of fixation to the projection even when the ventilation assembly is reduced in height.

A ventilation unit with: a ventilation body that allows gas to circulate between the outside and inside of a housing; a support member that supports the body attached to an opening portion formed in the housing; and a sealing member between the support member and the outer surface around the housing opening portion and seals a gap between the support member and the housing, wherein the unit performs ventilation between the outside and inside of the housing through the body while attached to the opening portion of the housing. The support member includes: an attachment portion to which the sealing member is attached; and a wall portion around the attachment portion, wherein, in a state where the support member is attached between the support member and the housing, a distance between the support member and an external surface in the support member wall portion is 5.0 mm or more.

Ventilation unit

A ventilation member of the present disclosure comprises: a support having a through hole that serves as an air passage between inside and outside of a housing upon attaching the support to an opening of the housing; and an air-permeable membrane disposed on the support and closing the through hole. The support comprises: a supporting portion in which the through hole is provided and at which the air-permeable membrane is disposed, and an insertion portion extending from the supporting portion and having an end with a hook, wherein the insertion portion bends in a direction closer to a central axis of the ventilation member while the hook is passing through the opening by being inserted into the opening, and fixes the ventilation member to the opening with the hook engaging the housing after passing through the opening. The ventilation member has a stopper portion with which bending of the insertion portion in the direction is restricted within an elastically deformable range of the insertion portion during the insertion into the opening. A ventilation member of the present disclosure can be reliably fixed to an opening of a housing with the insertion portion, even when the insertion portion is inserted into the opening at an angle.

Ventilation member

A ventilation component includes a valve body portion, a shaft portion, a ventilation path, and a gas-permeable membrane. The shaft portion extends in a normal direction of the valve body portion. The shaft portion supports the valve body portion. The ventilation path extends through the shaft portion. The gas-permeable membrane closes the ventilation path. In a state where the ventilation component is fixed to a housing, a flow of gas passing through a peripheral opening is blocked by the valve body portion, and ventilation occurs between an inner space and an external space via the gas-permeable membrane. When a pressure difference obtained by subtracting a pressure of the external space from a pressure of the inner space is equal to or higher than a predetermined value, the valve body portion elastically deforms to be away from an outer surface to release the pressure of the inner space.

A ventilation member is attached to a through hole of a housing. The ventilation member includes: a support body in which a ventilation path that forms a flow path for gas between the interior and the exterior of the housing; a sealing member that seals between the support body and the housing; a ventilation membrane that is provided on the ventilation path to prevent a liquid and a solid from passing through and to allow gas to pass through; and a surrounding portion that is provided to the support body and is formed with a uniform height to surround an end portion opening of the ventilation path.

A ventilation component () is to be attached to a housing () at a ventilation opening (). The ventilation component () includes a gas-permeable membrane (), a ventilation valve (), and a structural member (). The structural member () has an inner space (), and at least one of a first ventilation path () and a second ventilation paths (). The inner space () is a space accommodating the gas-permeable membrane () and/or the ventilation valve (). The first ventilation path () allows the inner space () to communicate with an external space of the ventilation component (). The first ventilation path () has a first inner opening () and a first outer opening (), and the first inner opening () faces the first outer opening (). The first inner opening () and the first outer opening () are present along a plane parallel to an outer surface () of the housing. The second ventilation path () has a second inner opening () and a second outer opening (), and the second inner opening () is present without facing the second outer opening ().

A method of manufacturing a support member, which includes a tubular-shaped tubular part and a coupling part coupling one portion and another portion of an inner circumferential surface of the tubular part to support a ventilation membrane, includes filling a fixed mold and a movable mold with a thermoplastic material or a thermosetting material, wherein the thermoplastic material or the thermosetting material is injected from a gate in the coupling part to be charged from the coupling part toward the cylindrical part.

Method for manufacturing supporting body

The ventilation unit includes: an explosion-proof valve that permits gas to flow from the inside of a housing to the outside of the housing when internal pressure within the housing is higher than external pressure outside the housing by a value larger than or equal to a predetermined value, and is capable of returning to block the flow of the gas from the inside of the housing to the outside of the housing; and a ventilation membrane that permits gas to flow between the inside and the outside of the housing even when a pressure difference between the internal pressure and the external pressure is less than the predetermined value.

A ventilation component () includes a gas-permeable membrane (), a ventilation valve (), and a structural member (). The ventilation component () is to be attached to a housing () having a ventilation opening (). The ventilation valve () includes an elastic body, and is opened and closed by elastic deformation of the elastic body. The structural member () supports the gas-permeable membrane () and the ventilation valve (). In an attached state where the ventilation component () is attached to the housing (), ventilation between an inside of the housing () and an outside of the housing () is carried out via the gas-permeable membrane (), and the ventilation valve () is opened to discharge a gas inside the housingto the outside of the housingwhen a difference between a pressure inside the housing () and a pressure outside the housing () is equal to or higher than a predetermined value. The elastic body included in the ventilation valve () is formed of a rubber whose rate of change in breaking strength is 95% to 120%.

Growing community of inventors

Osaka, Japan

Youzou Yano