The invention relates to a housing (105) having a pressure compensation device (100) for compensating a pressure in an interior (200) of the housing (105) in relation to surroundings (300) of the housing (105), said interior being in connection with the pressure compensation device (100). According to the invention, a main part (125) and a flexible sealing lip (120) of a lip sealing element (115) of an overpressure valve are formed in a single piece from an elastomer material and are held directly in the borehole (205) in a housing wall of the housing (105), a sealing surface (140), with which the flexible sealing lip (120) interacts, being formed by the radially inner circumferential surface of the borehole (205).

An explosion-proof housing 10 having at least one pressure relief body 15 arranged in a pressure compensation vent opening 14 of one of the housing parts 12, 13. In order to secure the pressure relief body 15 to the housing part 12, a thickened region 20 of the housing part 12 engages over an edge zone 24 of the pressure relief body 15 along its entire peripheral surface 23 on both of its flat sides 16, 17. A resulting engaging depth Si, which is measured parallel to the flat sides 16, 17, is preferably greater than a thickness D1, D2 of the part of the thickened region 20 engaging over the edge zone 24. The pressure relief element 15 consists of sintered wire mesh. This connection is pressure-resistant and stable over a wide temperature range.

Provided is an internal pressure adjustment member to be attached to an outer surface of a housing, the member having high air permeability even when a differential pressure that can be generated between the inside and the outside of a housing to which the internal pressure adjustment member is attached is small, and inhibiting damage to the member and a reduction in the air permeability of the member due to coming soil and mud. The internal pressure adjustment member includes: a filter portion including a net-like or mesh-like support layer and first and second porous polytetrafluoroethylene (PTFE) membranes laminated on the support layer such that the support layer is interposed therebetween, the first porous PTFE membrane being exposed on one surface of the filter portion, the second porous PTFE membrane being exposed on another surface of the filter portion; and an adhesive portion, formed on the one surface of the filter portion, for attaching the filter portion to the outer surface of the housing. The first porous PTFE membrane and the second porous PTFE membrane each have an average pore diameter of 2.0 μm or more, the filter portion has a thickness of 140 μm or less, and the filter portion has a density of 0.60 g/cm.sup.3 or less.

A resin molded article has an internal space. The resin molded article includes: a ventilation passage defined to allow the internal space to communicate with an outside of the resin molded article. The ventilation passage includes: a first ventilation passage extending from the internal space in a predetermined direction so as to include a bottom portion; and a second ventilation passage extending from the outside in a direction intersecting the predetermined direction. The first ventilation passage and the second ventilation passage communicate with each other by allowing the bottom portion to communicate with the bifurcated portions provided at an end portion of the second ventilation passage. A portion where the first ventilation passage and the second ventilation passage communicate with each other is narrowest in the ventilation passage.

An electronic device maintains a pressure adjustment function of a breathable filter. The electronic device includes a connector that includes a connector housing that closes an opening portion of a housing accommodating a circuit board and holds a connection terminal enabling electric connection of the circuit board to an external connector and a communication hole that penetrates the connector housing and allows an internal space and an external space of the housing to communicate with each other, and a filter attached to the connector housing to cover a first opening that opens in the communication hole on an internal space side of the housing. The connector housing has a shielding wall surrounding the periphery of the second opening of the communication hole that opens to the external space side of the housing and protrudes toward the external space side of the housing from the second opening of the communication hole.

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 internal member and the external member joined together. A height H1 of the internal member is 6 to 10 mm. A ratio of the height H1 of the internal member to a height H2 of the projection is 1.00 to 1.70. The ventilation housing of the present disclosure exhibits excellent performance in terms of moisture permeation between the inside and the outside of the housing and is capable of reducing dropping of the ventilation assembly from the projection of the housing.

An electronic display assembly with ventilation, and systems and methods related to the same are provided. The electronic display assembly includes an electronic display layer, a closed loop airflow pathway, and one or more vents fluidly interposed between the closed loop airflow pathway and an ambient environment. A controller may control the vents selectively and individually between an open state and a closed state.

Provided is a waterproof gas-permeable membrane (1) having higher levels of both gas permeability and waterproofness than conventional ones. The waterproof gas-permeable membrane (1) includes: a non-porous resin film (2) having through holes (21a to 21g) formed to extend through the thickness of the resin film (2); and a liquid-repellent layer (3) formed on a principal surface of the resin film (2) and having openings (31) positioned in register with the through holes (21a to 21g). The through holes (21a to 21g) extend straight and have a diameter of 15 μm or less. The through holes (21a to 21g) are distributed at a hole density of 1×10.sup.3 holes/cm.sup.2 or more and 1×10.sup.9 holes/cm.sup.2 or less in the resin film (2). The through holes (21a to 21g) extend in oblique directions with respect to a direction perpendicular to the principal surface of the resin film (2). The through holes (21a to 21g) that extend in different oblique directions are present together.

In order to create a housing element, comprising a housing wall and a receiving structure for a pressure compensation element, wherein the receiving structure comprises a through-opening for the passage of a gas, said housing element being configured such that a collection of liquid on a pressure compensation element mounted on the housing element is prevented or at least reduced, it is proposed that the receiving structure comprises at least one pressure compensation element abutment face that is raised, at least in sections, relative to an outer face of a base region of the housing wall.

There is provided an electric apparatus that can suppress the number of components from increasing and hence can suppress the production cost from rising, while providing a mechanism for covering a ventilation hole. The electric apparatus includes a case provided with a ventilation hole penetrating an outer wall, a protective member for covering outside of the ventilation hole, and one or both of a bracket for mounting the case to an external object and an external connector for electrically connecting an electronic component with outside; the protective member is a part of the bracket or a part of the external connector; a communication path for making the outer opening portion of the ventilation hole communicate with outside is provided between the outer wall and the protective member.