Abstract: A waterproof sound-transmitting membrane (10) includes a sound-transmitting region (13c) having a porous polytetrafluoroethylene (PTFE) membrane (11). The porous PTFE membrane (11) has a through-thickness air permeability of 2 cm3/cm2/s or more. Thus, it is possible to provide a waterproof sound-transmitting membrane that is suitable for reducing crackling noise while ensuring waterproofness required for at least daily use. The porous PTFE membrane (11) has a water entry pressure of 3 kPa or more, preferably 20 kPa or more and 50 kPa or less. The waterproof sound-transmitting membrane (10) may include an edge region (13p) having an adhesive layer (12).

Abstract: Provided is a waterproof ventilation structure including: a housing (20) including an inner space (22) and an opening portion (21); a waterproof gas-permeable membrane (11) placed to cover the opening portion (21); an electroacoustic transducing part (40) placed in the inner space (22); a first double-faced adhesive tape (31) directly joining an inner surface of the housing (20) and an edge portion of one surface of the waterproof gas-permeable membrane (11) together; and a second double-faced adhesive tape (32) directly joining an edge portion of the other surface of the waterproof gas-permeable membrane (11) and the part (40) together. The waterproof gas-permeable membrane (11) has a water entry pressure of 50 kPa or more, and the first double-faced adhesive tape (31) includes a base including a foam material.

Abstract: A vehicle lamp (100) includes a light source (10), a lens (20), a housing (30), and a vent portion (40). The housing (30) is combined with the lens (20) to form a lamp space (50) in which the light source (10) is disposed. The lamp space (50) includes a narrow gap region (50a) having a width of 10 mm or less between the lens (20) and the housing (30). This width corresponds to the distance between them. The vent portion (40) is provided on the housing (30) at a position facing the narrow gap region (50a).

Abstract: A ventilation structure (10A) includes a housing (50) having an opening portion (50a) and a ventilation member (1A) formed of a porous resin and attached to the housing (50) so as to cover the opening portion (50a). In the ventilation structure (10A), the ventilation member (1A) is fitted to a side surface (50d) of a projecting portion (50b) provided on an outer surface of a wall portion (50g) of the housing (50), with at least one of the projecting portion (50b) and the ventilation member (1A) being elastically deformed.

Abstract: Provided is a gas permeable member including a gas permeable sheet configured to allow a gas to permeate therethrough; and a holder configured to hold the gas permeable sheet, wherein the gas permeable member is mounted in a container body having a surface on which a through hole communicating with an internal space is open by being inserted through the opening, so as to allow the gas to permeate therethrough between the internal space and the outer space of the container body via the gas permeable sheet, and the gas permeable member further includes a pressing part that contacts with an inner wall of the through hole and that presses the inner wall toward the open side at the contact position when a force is applied in a pull-out direction from the open side.

Abstract: A vehicle lamp (100) includes a light source (10), a lens (20), a housing (30), and a vent portion (40). The housing (30) is combined with the lens (20) to form a lamp space (50) in which the light source (10) is disposed. The lamp space (50) includes a narrow gap region (50a) having a width of 10 mm or less between the lens (20) and the housing (30). This width corresponds to the distance between them. The vent portion (40) is provided on the housing (30) at a position facing the narrow gap region (50a).

Abstract: A gas permeable member includes: a gas permeable sheet configured to allow a gas to permeate therethrough; a holder including a gas flow hole that allows the gas to circulate therethrough and configured to hold the gas permeable sheet inside the gas flow hole; a cover mounted on the holder so as to cover an opening of the gas flow hole on a side on which the gas is discharged; and a gas discharge path formed between the cover and the holder and configured to discharge the gas discharged from the gas flow hole between the cover and the holder.

Abstract: A cover for gas permeable container which is mounted on a container body having an internal space and an opening communicating with the internal space includes: a closing part configured to close the opening; and a gas permeable part configured to be permeable to a gas, thereby allowing the gas to flow between the internal space and an outer space of the container body, wherein the gas permeable part is constituted by a gas permeable member having a gas permeable sheet, and the gas permeable member is integrally formed with a material constituting the closing part.

Abstract: Provided is a gas permeable member including a gas permeable sheet configured to allow a gas to permeate therethrough and a holder configured to hold the gas permeable sheet, wherein the holder includes an insertion part into which the discharge part of the container body can be inserted, and a discharge opening through which the gas discharged into the holder from the discharge part inserted in the insertion part can be discharged to the outside of the holder, and the gas permeable sheet is held so as to intersect a gas flow path formed between the discharge opening and the discharge part inserted in the insertion part.

Abstract: A ventilation member includes: a first metal body including a flat portion having a first through-hole formed therein; an air-permeable membrane having a first principal surface and a second principal surface and placed on the flat portion of the first metal body so that the first principal surface covers the first through-hole; a second metal body including a flat portion having formed therein a second through-hole separated from the first through-hole by the air-permeable membrane, the second metal body being placed on a second principal surface side of the air-permeable membrane so that passage of air is permitted between the first through-hole and the second through-hole through the air-permeable membrane; and a joint portion fixing the first metal body and the second metal body to each other. The air-permeable membrane has a portion located outwardly of an outer end of the flat portion of the first metal body and an outer end of the flat portion of the second metal body.

Abstract: A waterproof sound-transmitting membrane (10) includes a sound-transmitting region (13c) having a porous polytetrafluoroethylene (PTFE) membrane (11). The porous PTFE membrane (11) has a through-thickness air permeability of 2 cm3/cm2/s or more. Thus, it is possible to provide a waterproof sound-transmitting membrane that is suitable for reducing crackling noise while ensuring waterproofness required for at least daily use. The porous PTFE membrane (11) has a water entry pressure of 3 kPa or more, preferably 20 kPa or more and 50 kPa or less. The waterproof sound-transmitting membrane (10) may include an edge region (13p) having an adhesive layer (12).

Abstract: Provided is a waterproof ventilation structure including: a housing (20) including an inner space (22) and an opening portion (21); a waterproof gas-permeable membrane (11) placed to cover the opening portion (21); an electroacoustic transducing part (40) placed in the inner space (22); a first double-faced adhesive tape (31) directly joining an inner surface of the housing (20) and an edge portion of one surface of the waterproof gas-permeable membrane (11) together; and a second double-faced adhesive tape (32) directly joining an edge portion of the other surface of the waterproof gas-permeable membrane (11) and the part (40) together. The waterproof gas-permeable membrane (11) has a water entry pressure of 50 kPa or more, and the first double-faced adhesive tape (31) includes a base including a foam material.

Abstract: A ventilation structure (10A) includes a housing (50) having an opening portion (50a) and a ventilation member (1A) formed of a porous resin and attached to the housing (50) so as to cover the opening portion (50a). In the ventilation structure (10A), the ventilation member (1A) is fitted to a side surface (50d) of a projecting portion (50b) provided on an outer surface of a wall portion (50g) of the housing (50), with at least one of the projecting portion (50b) and the ventilation member (1A) being elastically deformed.

Abstract: A ventilation member (1A) includes a wall portion (2a), an attachment portion (2b), and a plurality of recessed portions (2d). The wall portion (2a) is formed to define the recessed portions (2d) and is configured to allow a gas to pass through between its inner surface facing the recessed portions (2d) and its outer surface opposite to the inner surface. The attachment portion (2b) is formed to extend outwardly around a rectangular opening (2c) and provides an attachment surface adapted to be attached to a housing (50) that needs to be ventilated. The ventilation member (1A) is a member formed of a porous resin, and at least the wall portion (2a) and the attachment portion (2b) are integrally formed.

Abstract: Provided is a ventilation member including: a permeable member that includes a permeable sheet material that selectively allows a certain gas to pass therethrough, and a first frame body that supports a peripheral edge portion of the permeable sheet material; and a protection member that includes a protection sheet material, and a second frame body that supports a peripheral edge portion of the protection sheet material, wherein the permeable member and the protection member are integrally configured by the first frame body and the second frame body coupled to each other, and wherein the protection sheet material is disposed on at least one side of the permeable sheet material.

Abstract: The present invention provides a sound-transmitting membrane for a microphone, to be disposed to a sound-collecting opening of the microphone so as to allow sound to transmit through the membrane while preventing a foreign matter from entering into the microphone through the opening. This membrane for a microphone prevents the entry of a foreign matter, such as fine dust and water vapor, that is difficult for conventional sound-transmitting membranes to block, and ensures the microphone performance. This membrane for a microphone is composed of a nonporous film or a multilayer membrane including a nonporous film, has a surface density of 30 g/m2 or less, and has a sound transmission loss of less than 3 dB in a frequency range of 300 to 4000 Hz.

Abstract: A ventilation system 1 includes: a housing 2 having at least one pair of ventilation holes 21; and a piezoelectric blower 3 attached to at least one of the pair of ventilation holes 21. The piezoelectric blower 3 is operative to vibrate a diaphragm by a piezoelectric element so as to produce air circulation through the ventilation holes 21. With this configuration, it is possible to produce forced convection while saving space, since the piezoelectric blower 3 has the shape of a thin plate. In addition, since the piezoelectric blower 3 continuously operates while being supplied with electricity, moisture can be discharged from the interior of the housing 2 to the outside in a short time.

Abstract: A waterproof ventilation structure according to the present invention includes: a housing having an interior space and an opening communicating the interior space with an exterior space; and a waterproof air-permeable membrane covering the opening. The waterproof air-permeable membrane is a layered product including a first stretched porous polytetrafluoroethylene (PTFE) membrane containing a filler and a second stretched porous PTFE membrane not containing a filler. The waterproof air-permeable membrane is disposed so that the second stretched porous PTFE membrane is located closer to the interior space than the first stretched porous PTFE membrane. The present invention provides a waterproof ventilation structure configured such that a filler is less likely to fall in a housing.

Abstract: The ventilation member of the present invention includes a waterproof gas permeable membrane (11), and a support body (12) having a through hole (13). One opening of the through hole (13) is closed by the gas permeable membrane (11). The support body (12) includes, at an edge of the opening closed by the gas permeable membrane (11), a first region and a second region facing each other with the opening located therebetween. A first angled protrusion (12a) in which a peak and a trough are arranged alternately along the edge of the opening is provided in the first region, and a second angled protrusion (12b) in which a peak and a trough are arranged alternately along the edge of the opening is provided in the second region.

Abstract: The present invention provides a resin porous membrane with an adhesive layer that exhibits excellent bonding precision and can be bonded to an adherend while maintaining the gas permeability of the porous membrane even when the porous membrane is small, and a method for producing the resin porous membrane with the adhesive layer. The present invention also provides the filter member including the resin porous membrane with the adhesive layer.