128 results about "Acoustic membrane" patented technology

An electronic device includes a chassis, a voice receiving unit, an acoustic membrane, and a sealing mechanism. The chassis has a through hole. The sealing mechanism includes a sealing body and a sealing ring. The sealing body has an accommodation portion and a channel. One of two ends of the channel is in communication with the accommodation portion, and the other end has a first opening. The accommodation portion accommodates the voice receiving unit. The sealing ring is between the sealing body and the acoustic membrane, and has a penetration hole. The penetration hole, the through hole and the first opening correspond to each other. A ring hardness of the sealing ring is less than a body hardness of the sealing body.

A microphone assembly for exterior use on vehicles having a housing base including at least one compartment, a PCBA (printed circuit board assembly) with at least one acoustic membrane, a sealing cover to at least partially overlap with the compartment is disclosed. The sealing cover has at least one opening with said opening at least partially aligned with said acoustic membrane. The assembly has a housing cover including a first grid at least partially aligned with said opening in the sealing cover, and a shielding cover. The shielding cover has a second grid at least partially aligned with said opening in the sealing cover. The first grid and the second grid are aligned in offset in order to provide a labyrinth path without straight passthrough passages from the exterior of the microphone assembly to the acoustic membrane.

The utility model provides an outdoor Bluetooth sound equipment with good waterproof effect, which relates to the technical field of Bluetooth sound equipment and comprises a shell and a sound box mechanism, a partition plate is fixedly connected inside the shell, and the sound box mechanism is arranged on the inner side of the shell. Through the arrangement of the sound box mechanism, a battery can be charged without using a charging interface through the wireless charging coil, the integrity of the shell is protected, and through the arrangement of the loudspeaker assembly, the waterproof sound transmission film prevents water from permeating into the loudspeaker and does not affect the quality of sound played by the loudspeaker at the same time. The protection cover can protect the waterproof sound transmission film from being damaged by sharp objects, the sealing performance of the waterproof sound transmission film is protected, through the arrangement of the waterproof assembly, the cavitation column can float upwards when the equipment is completely immersed in liquid, one side of the loudspeaker assembly is made to float on the water surface, and water leakage caused by the fact that the sealing performance of the equipment is damaged by water pressure in the deep position of the liquid is prevented. The sealing ring can further prevent liquid from permeating into the equipment, and the waterproof performance is further improved.

The invention relates to a self-guiding ultrasonic treatment head and an ultrasonic treatment hand tool, and belongs to the technical field of medical instruments.The self-guiding ultrasonic treatment head comprises a treatment head shell, a sound transmission film, a moving shaft, an energy conversion assembly, a first sealing sleeve, a second sealing sleeve and a deflection force generation structure, and the sound transmission film covers a sound transmission opening of the treatment head shell in a sealing mode; one end of the moving shaft is movably inserted into the treatment head shell, the transduction assembly comprises an installation support and a transducer, a first limiting face is formed in the treatment head shell, the deflection force generating structure enables the installation support to deflect, and a first guide protrusion of the installation support abuts against the first limiting face all the time. According to the self-guiding ultrasonic treatment head and the ultrasonic treatment hand tool provided by the invention, the mounting bracket is deflected towards the first limiting surface through the deflection force generating structure, and the first guiding bulge always abuts against the first limiting surface, so that the movement straightness of the transduction assembly is improved, the movement of the transduction assembly is not excessively hindered, and the service life of the transduction assembly is prolonged. And the transduction assembly is prevented from moving and blocking or being locked.

The utility model discloses a cutting head and a skin treatment device, the cutting head comprises a shell, the shell is provided with a mounting cavity and a sound wave outlet, and the sound wave outlet penetrates through the side wall of the shell; the transducer assembly is arranged in the mounting cavity, the transducer assembly is arranged corresponding to the sound wave outlet, and the ultrasonic emission direction of the transducer assembly faces the sound wave outlet; the packaging film structure is arranged on the shell, and the packaging film structure comprises a sound transmission film, an insulating supporting sheet and a touch flexible circuit board which are arranged in a stacked mode; the sound transmission film covers the sound wave outlet in a sealing mode, and the insulation supporting piece and the flexible circuit board are located between the sound transmission film and the shell. According to the technical scheme, the safety of the tool bit can be improved.

Systems and methods for a MEMS microphone package are disclosed. The MEMS microphone package may include a first port to direct sound to a MEMS system, including a die substrate, an acoustic membrane, and one or more plates. The MEMS microphone package may include an ASIC to produce microphone output based on an electrical signal, a PCB, a lid, and a second port. The first port and the second port may define a front volume and a back volume respectively. The second port may increase the back volume to improve sensitivity and reduce the acoustic sensor's noise floor to improve signal-to-noise ratio.

The invention relates to a microphone assembly, especially for external use for a vehicle, comprising: - a housing base comprising at least one compartment; - a PCBA (Printed Circuit Board Assembly) with at least one acoustic membrane; - a sealing cover at least partially overlapping the compartment; - wherein the sealing cover comprises at least one opening at least partially aligned with the acoustic membrane; - further comprising a housing cover; - wherein the housing cover comprises a first grid at least partially aligned with the opening in the sealing cover; - and a shielding cover; - wherein the shielding cover comprises a second grid at least partially aligned with the opening in the sealing cover; wherein the first grid and the second grid are offset aligned in order to provide a labyrinth path without a straight through passage from the outside of the microphone assembly to the acoustic membrane.

A ventilation assembly unit for an electronic housing is presented, the ventilation assembly unit comprising a surrounding element and a ventilation assembly comprising a first permeable layer, a substantially impermeable acoustic membrane, a second permeable layer and an acoustic transducer; a first permeable layer positioned on a first side of the substantially impermeable acoustic membrane and a second permeable layer positioned on a second side of the substantially impermeable acoustic membrane; defining an acoustic volume between the substantially impermeable acoustic membrane, the second permeable layer, and the acoustic transducer; wherein the ventilation assembly unit is configured to be mounted over an aperture in the enclosed container such that the enclosing element isolates the ventilation assembly from an interior volume of the enclosed container and defines a containment volume between the ventilation assembly and the enclosing element, the ventilation assembly is configured during use such that an air passage is disposed from outside the enclosed container, through the first permeable layer, through the containment volume, and through the second permeable layer to the acoustic volume.

The invention relates to a watch case (10) for a wristwatch having a music or bell mechanism, the watch case (10) being configured to comprise an acoustic membrane (28) held by its periphery at the bottom of the watch case (10). The watch case comprises a cover (14) comprising a bottom (20). The cover (14) is hingedly mounted between an open position and a closed position in which a bottom (20) of the cover (14) allows covering an outer face of the acoustic membrane (28) to ensure that the membrane can vibrate freely. The watch case (10) further comprises at least one sound diffusion opening (24).

The utility model relates to the technical field of cutting equipment, and discloses a cutting machine for processing a waterproof breathable sound-transmitting membrane, which comprises a processing table, a cutting mechanism is arranged at the top of the processing table, and the cutting mechanism consists of a cutting component for cutting the waterproof breathable sound-transmitting membrane and an adjusting component for adjusting the cutting component. When the waterproof breathable sound-transmitting membrane cutting device is used, a user can convey and cut a waterproof breathable sound-transmitting membrane through the cutting assembly, then the cutting depth of the cutting knife is adjusted through the adjusting assembly, the waterproof breathable sound-transmitting membrane can be automatically cut, and meanwhile the cut waterproof breathable sound-transmitting membrane can be conveyed and transferred. And in addition, the cutting depth of the cutting knife can be adjusted, so that a user can conveniently and automatically cut objects with different thicknesses, and the application range of the cutting machine is further widened.

The present invention discloses an integrated external cochlear implant device. The main shell assembly includes a main shell, a spring pin, a debugging copper column, a waterproof ring, a light guide plate, a button, a fixing part, a waterproof pad, a microphone, a microphone cover, a fixing foam, a waterproof sound-permeable membrane, a D-shaped dustproof membrane, a microphone fixing part, a PCBA soft-rigid combination board, a PCB small board, and a double-hole soft board. The main shell is also provided with an X-axis buckle position, a Y-axis buckle position, and a Z-axis buckle position; the bottom shell assembly includes a bottom shell, a switch, a spring piece, and a waterproof groove. The waterproof groove is the buckled connection between the main shell assembly and the bottom shell assembly, and a waterproof fixing glue is also provided in the waterproof groove. The present invention combines the existing product with a three-in-one design and eliminates the use of precious metal titanium alloy, significantly reducing production, material, and maintenance costs, reducing volume and weight to make it more sophisticated, and effectively improving multiple technical quality indicators such as the product's waterproof effect, functional connection stability, and production efficiency.

This application relates to a waterproof sealing mechanism for a microphone and an electronic device. Based on this application, a sound transmission channel can be formed between a sound-permeable hole in the device housing and a microphone mounted on a module substrate. Furthermore, a waterproof sound-permeable membrane and a sealing film are stacked and sealed between the module substrate and the device housing. The waterproof sound-permeable membrane is horizontally placed within the sound transmission channel, and the sound-permeable holes of the sealing film seal and surround the sound transmission channel penetrating the waterproof sound-permeable membrane between the substrate's pickup hole and the sound-permeable hole, thereby achieving a waterproof seal for the sound transmission channel. Additionally, the sealing film also forms a sealed partition around the outer periphery of the waterproof sound-permeable membrane between the device housing and the module substrate, achieving a secondary waterproof seal for the sound transmission channel. This improves the impact of the sound-permeable hole on the sealing performance of the device housing. Furthermore, if a microphone array containing multiple microphones is used, the sealing consistency of the multiple sound-permeable holes can also be ensured.

The utility model discloses a waterproof structure and a digital loudspeaker, and relates to the technical field of loudspeakers, and the waterproof structure comprises a protection layer which is attached to the outer wall, deviating from a sound production cavity, of a shell in the loudspeaker and covers a sound production hole in the shell; the sound transmission membrane assembly covers the sound outlet hole, the sound transmission membrane assembly is close to the sound production cavity relative to the protective layer, and the sound transmission membrane assembly comprises a waterproof sound transmission membrane and a supporting layer; the water absorption part comprises a first water absorption layer and a second water absorption layer which are both arranged in the sound production cavity, the first water absorption layer surrounds the edge of the sound production hole, and the second water absorption layer is located in the opening direction of the sound production hole and corresponds to the sound production hole. According to the waterproof structure provided by the utility model, water drops and moisture are blocked and absorbed layer by layer through the protection layer, the sound transmission membrane assembly and the water absorption part, so that the waterproof capability is improved, a relatively good dry environment can be kept in the sound production cavity, the aging of an electronic device accelerated by a humid environment is obviously slowed down, and the service life of a product is prolonged.

The utility model discloses an online acoustic module with waterproof sound -transmitting membrane structure of quick replacement, including acoustic module main part, microphone FPA board, waterproof sound -transmitting membrane and magnetic formula fixing structure. The acoustic module main part is inlayed with first annular strong magnetic sheet at microphone FPA board fixed surface, and waterproof sound -transmitting membrane is compacted on FPA board through pressing plate, and the inlayed second annular strong magnetic sheet in pressing plate realizes quick dismounting with magnetic attraction principle. Module adopts the cooperation of positioning column and positioning hole to ensure installation accuracy, and is equipped with foamed silica gel O ring and is enhanced sealed dustproof performance. The handle of pressing plate design is convenient for operation, and the front shell adopts light weight aluminum alloy material to reduce acoustic interference. The utility model discloses through magnetic formula structure simplifies the replacement process of waterproof sound -transmitting membrane, improves maintenance efficiency, guarantees the stability and sealing property of connection simultaneously, and is applicable to the long -term reliable acoustic monitoring demand in industrial environment.

1. The name of the product of this design: medical coupling agent device. 2. Purpose of the product of this design: a device for installing an ultrasonic probe through a medical coupling agent isolation sound-transmitting membrane. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model provides a direct installation warning tower lamp which comprises a buzzer cover, a sound production circuit board assembly, a lamp shell, a light-emitting circuit board assembly, a bottom sleeve and an installation base, the sound production circuit board assembly, a waterproof sound transmission film and double-faced adhesive sealing foam are coaxially fastened in the buzzer cover through screws, the sound production circuit board assembly is provided with a sound production buzzer, and the light-emitting circuit board assembly is provided with a waterproof sound transmission film. The buzzer cover and the lamp shell are installed in a clamping mode in a buckling mode, the light-emitting circuit board assembly is installed on the installation base, lamp beads are integrated on the light-emitting circuit board assembly, the lamp shell and the bottom sleeve are coaxially fastened through screws, and the bottom sleeve and the installation base are coaxially fastened through screws. According to the warning tower lamp, waterproof rings are arranged at the joint of a buzzer cover and lamp shells, the joint of the lamp shells, the joint of the lamp shells and a bottom sleeve and the joint of the bottom sleeve and a 3PIN mounting base; and a space enclosed by the buzzer cover, the lamp shell, the bottom sleeve and the 3PIN mounting base is sealed. The directly-installed warning lamp is good in sealing effect and high in waterproof performance.

A waterproof sound-transmitting film according to an embodiment includes a polyurethane and has a bio-based content of 20% or more. The waterproof sound-transmitting film can be provided with reduced environmental load.

The invention relates to an acoustic device (10) for a ringing member, comprising: an acoustic membrane (20); at least one piezoelectric element (30, 30a, 30b, 30c, 32) arranged to cooperate with the acoustic membrane (20); and at least one electrical circuit (40a, 40b) integrated with a piezoelectric element. The acoustic device (10) further comprises at least one spring strip (12, 14) that can be struck by a hammer. Comprising a piezoelectric element (30, 30a, 30b, 30) and a circuit (40a, 40b) is configured to adjust the resonant frequency of the acoustic membrane (20) in accordance with the resonant frequency of the at least one spring strip (12, 14). The invention also relates to a sounding member, in particular a timepiece, comprising said acoustic device (10).

The utility model belongs to the technical field of loudspeakers, and particularly relates to a loudspeaker with waterproof measures, which comprises a loudspeaker main body, a waterproof assembly is mounted on the front side of the loudspeaker main body, a dehumidification assembly is mounted on the rear side of the loudspeaker main body, and the waterproof assembly consists of a waterproof front cover, a waterproof sound transmission film and a waterproof inner cover. The waterproof front cover and the waterproof inner cover are made of plastic materials in an injection molding mode, the waterproof sound transmission film has the waterproof sound transmission function, it can be guaranteed that sound can penetrate through the film material, the sound quality is basically unchanged, rainwater can be prevented from entering the loudspeaker body through the front of the loudspeaker body through the waterproof sound transmission film, and the waterproof performance of the loudspeaker body is effectively improved. And the drying agent bags are filled in the plurality of inner hollow shells, and the drying agent bags can dehumidify air in the loudspeaker main body, so that the service life of the loudspeaker main body can be prolonged again.

The invention relates to the technical field of production of rubber membrane materials, in particular to a production process and system of a low-temperature-resistant rubber acoustic membrane. The method comprises the following steps: taking AEM as a base material, and completing the basic preparation of the low-temperature-resistant rubber acoustic membrane through the links of banburying and rubber mixing, open milling and sheet discharging, coating and membrane preparation, and vulcanization and shaping; dividing a current low-temperature-resistant rubber acoustic membrane detection sub-region, acquiring detection data of each link of the sub-region for the same detection batch, and performing detection link linkage to generate a comprehensive detection result of the detection sub-region; dynamically adjusting a parameter strategy based on the deviation level and source of the comprehensive detection result; the system comprises a rubber acoustic membrane preparation module, a detection step linkage module and a production parameter dynamic adjustment module. Through the mode, the accuracy of a production detection result is improved, so that the production quality of the low-temperature-resistant rubber acoustic membrane is improved.

The utility model provides a waterproof membrane sound transmission assembly, which comprises a dustproof gauze, a connecting adhesive tape, a waterproof sound transmission membrane and a bonding layer, the dustproof gauze and the waterproof sound transmission membrane are bonded together through the connecting adhesive tape, the waterproof sound transmission membrane is bonded on an acoustic product through the bonding layer, a support material layer is bonded on the upper surface of the dustproof gauze, and the bonding layer is an AB double faced adhesive tape. The surface A of the AB double-faced adhesive tape is silica gel, the surface B of the AB double-faced adhesive tape is acrylic adhesive, the silica gel of the surface A is bonded with the acoustic product, and the acrylic adhesive of the surface B is bonded with the waterproof sound-transmitting film. The bonding layer is the AB double-faced adhesive tape, a traditional multi-layer structure is replaced, the processing flow can be reduced, and the thickness of the product can be better controlled; meanwhile, the dustproof gauze and the supporting material layer are additionally arranged outside the waterproof sound-transmitting membrane, the dustproof gauze has a good dustproof effect, pollution of dust to the waterproof sound-transmitting membrane can be effectively reduced, impact force is effectively reduced when water flow impact exists, and the waterproof effect is improved.

An acoustic vent assembly is provided comprising a nonporous acoustic membrane, and a breathable element, the breathable element defining an aperture and an acoustic pathway extends from a first side of the acoustic vent assembly to a second side of the acoustic vent assembly through the aperture and the nonporous acoustic membrane, the breathable element configured to be positioned between the nonporous acoustic membrane and an acoustic transducer when the acoustic vent assembly is installed in an acoustic device comprising an acoustic transducer.

The utility model relates to the technical field of material strap folding jigs, in particular to a double-sided adhesive tape pasting device for an acoustic waterproof sound transmission film. Comprising a discharging device, a double-faced adhesive tape one-time punching device, a first film laminating machine, a material belt folding device, a second film laminating machine and a product appearance punching device which are sequentially arranged according to the rubberizing process, the first film laminating machine is used for laminating gauze, and the material belt folding device comprises a material belt folding jig and a bending device. The bending device is matched with the material belt folding jig to achieve symmetrical bending of the material belt. According to the utility model, one-time punching forming is directly carried out on the machine table, and the material belt is overturned and folded through the special material belt folding jig, so that one-time opposite pasting forming is realized, and the problems of matching size deviation and low productivity caused by manual and jig reasons are reduced; and moreover, the problem of rubberizing alignment of sound transmission films and gauze products with rubberized double surfaces in the industry is effectively solved, the labor cost is saved, and the product competitiveness is effectively improved.

The utility model discloses a metal sound absorption and insulation composite board, and relates to the technical field of sound insulation and noise reduction. The composite board comprises a composite board body, the composite board body is composed of a galvanized steel plate, a damping sound insulation felt, a light steel keel, glass sound absorption cotton, a wrapping layer and a galvanized perforated plate, the glass sound absorption cotton is filled in the inner side of the light steel keel, and sound absorption glass fabric and a waterproof sound transmission film are wrapped outside the light steel keel and used for water prevention and sound transmission of the composite board. The metal sound absorption and insulation composite board is used for manufacturing a sound insulation and noise reduction device of an equipment sound insulation cover, is usually composed of a cover and can cover a high-noise sound source inside, so that noise is effectively prevented from being transmitted outwards, the influence of the noise on the environment is reduced, the noise can be effectively absorbed, converted and blocked through a multi-layer structure, and the sound insulation and noise reduction effects are good. And noise generated during operation of the equipment is obviously reduced.

The application discloses a microphone device, a manufacturing method thereof and a breathing mask, wherein the microphone device comprises a waterproof sound-permeable film, a microphone and an assembling unit, the assembling unit comprises an assembling body and a first assembling arm integrally extending outward from the assembling body, the first assembling arm has an assembling cavity and an assembling opening communicated with the assembling cavity, the microphone is installed in the assembling cavity of the first assembling arm from the assembling opening of the first assembling arm, and a receiving surface of the microphone faces the assembling opening of the first assembling arm, the waterproof sound-permeable film is arranged on the first assembling arm, and the waterproof sound-permeable film seals the assembling opening of the first assembling arm.

The utility model provides a voice diaphragm packaging plate machining device, and belongs to the technical field of voice diaphragm packaging equipment, the voice diaphragm packaging plate machining device comprises a rotating disc, a first conveying belt, a second conveying belt, a nailing machine and a discharging assembly are sequentially arranged on the outer side of the rotating direction of the rotating disc, the first conveying belt is used for conveying paperboards, and the second conveying belt is used for conveying foam pads; a pushing and supporting piece and material blocking pieces arranged in a circumferential array are arranged in the middle of the rotary disc, one face of each material blocking piece abuts against the pushing and supporting piece, limiting plates are symmetrically arranged at the two ends of each material blocking piece respectively, limiting rods are arranged on the opposite sides of the material blocking pieces, so that an assembly area is formed by the limiting rods, the limiting plates and the material blocking pieces in an enclosed mode, and through holes are formed in the rotary disc in a circumferential array mode; the nailing machine comprises a nailing head used for nailing connecting nails into the two ends of the packaging plate. The material assembly comprises an ejector rod which is vertically arranged in a telescopic mode and used for penetrating through the through holes to push out the packaging plates provided with the connecting nails. By means of the scheme, manual work can be replaced, paperboards and foam pads can be automatically stacked and assembled, and efficiency is high.

The utility model discloses a contact-free ring sleeve for an ultrasonic isolation sound-transmitting membrane, and solves the problems that a fixing sleeve for the ultrasonic isolation sound-transmitting membrane in the prior art is inconvenient to disassemble and assemble and cannot ensure that the ultrasonic isolation sound-transmitting membrane is buckled in place at a time. The ultrasonic isolation sound transmission membrane contact-free loop comprises a hook-shaped lower seat and a C-shaped upper seat which are matched in a clamping mode, the hook-shaped lower seat and the C-shaped upper seat are buckled to form a C-shaped cavity, and a C-shaped open groove is reserved in the inner cavity wall of the C-shaped cavity. The hook-shaped lower seat comprises a C-shaped clamping seat part and a handle part which are integrally formed, and the C-shaped upper seat is clamped and matched with the C-shaped clamping seat part through a fastener; and the two ends of the C-shaped upper seat are in limiting fit with the C-shaped clamping seat parts through limiting pieces. According to the utility model, the C-shaped upper seat is peripherally limited between the hook-shaped lower seat and the C-shaped upper seat through the limiting piece arranged at the end part, so that the C-shaped upper seat and the C-shaped clamping seat part can be buckled in place at one time, the matching precision is ensured, the operation is simplified, and the damage to the sound transmission film is reduced.

This invention discloses a highly sensitive detection device and method for immersion-type ultrasonic signal detection in liquids. The invention provides a circular diaphragm with concentric corrugations and a center-thinned structure, and uses this diaphragm as a reflective surface of an optical interference cavity to construct a highly sensitive detection device for immersion-type ultrasonic signal detection in liquids. The diaphragm, used to sense ultrasonic signals, has identical concentric corrugations and a center-thinned structure on both sides, enabling the diaphragm to achieve higher mechanical sensitivity without significantly reducing its natural frequency. The concentric corrugations effectively release initial residual stress introduced during processing and packaging, reducing surface warping and baseline drift. Simultaneously, a replaceable acoustic membrane is constructed in front of the diaphragm, achieving high sound transmission and anti-contamination under long-term immersion in liquid conditions. This detection device can be directly placed in the liquid for detection, improving the sensitivity of ultrasonic signal detection while maintaining a wide frequency range, preventing contamination of the detection element, and ensuring the long-term stability of the detection device.

The utility model relates to an ultrasonic isolation sound transmission membrane, which belongs to the field of medical auxiliary supplies and comprises a first membrane section and a third membrane section, the third membrane section is positioned in the first membrane section, the right side of the first membrane section is open, the left side of the first membrane section is connected with the left side of the third membrane section, and the right side of the third membrane section is sealed. When the probe portion of the ultrasonic probe sequentially extends into the second membrane section and the first membrane section, air can conveniently enter the second membrane section and the third membrane section due to the fact that the left side of the second membrane section is open, and meanwhile, the air can be effectively prevented from entering the second membrane section and the third membrane section along with the extension of the probe portion. The opening side of the first diaphragm section is opened, so that air can enter from the opening of the first diaphragm conveniently, the influence of negative pressure on operation is avoided, and the pollution caused by direct contact between the hand and the contact surface of the diaphragm and a human body is avoided; the effect that the first diaphragm is tightly bound on the handle part can be achieved by the first diaphragm section only by pushing the binding sleeve.

An apparatus having a microphone and a condensate collection device that prevents migration of condensate to the microphone is provided. The device comprises: a microphone; a plate having an acoustic port therethrough, the microphone positioned to accept sound through the acoustic port; a moisture-proof sound-transmitting membrane over the acoustic port; an outer membrane receiving sound for the microphone, the outer membrane being impermeable to at least moisture; and a condensate collection device between the outer membrane and the sound-transmitting membrane. The condensate collection device includes: a hole through which sound from the outer membrane passes; and one or more condensate collection features at an outer membrane facing side of the condensate collection device, the one or more condensate collection features configured to: collect condensate migrating from an inner side of the outer membrane; and prevents migration of the coagulum collected through the pores.