阅读说明：本技术 一种防水透声膜组件 (Waterproof sound-transmitting membrane assembly ) 是由 贾建东 蔡梁 于 2020-05-22 设计创作，主要内容包括：本发明提供了一种能够在水下100米正常使用的防水透声膜组件,包括第一防水层和第二支撑层,所述第一防水层与所述第二支撑层之间存在间隔d,所述第一防水层包含防水段,所述防水段直径长度为D；在受到1MPa水压时,防水段的相对形变量E＝(2d+AD)/D不大于防水段的弹性极限相对变形量S；其中A为在1MPa水压作用时,第二支撑层的相对变形量；防水段的弹性极限相对变形量S的范围为1％-30％。第一防水层具有高度疏水性、优良的耐化学品性和绝缘性等特征,第二支撑层具有较大的弹性极限压力,用于为第一防水层提供支撑作用；防水透声膜组件能够抵挡1MPa(100米水压)的影响,在水下100米时依然能够起到防水透声的作用,从而保证电子设备的正常应用。(The invention provides a waterproof sound-transmitting membrane component capable of being normally used 100 meters underwater, which comprises a first waterproof layer and a second supporting layer, wherein a gap D exists between the first waterproof layer and the second supporting layer, the first waterproof layer comprises a waterproof section, and the diameter and the length of the waterproof section are D; when the waterproof section is subjected to water pressure of 1MPa, the relative deformation quantity E ═ 2D + AD)/D of the waterproof section is not more than the elastic limit relative deformation quantity S of the waterproof section; wherein A is the relative deformation of the second supporting layer under the action of 1MPa water pressure; the elastic limit of the waterproof section is 1-30% relative to the deformation S. The first waterproof layer has the characteristics of high hydrophobicity, excellent chemical resistance, insulativity and the like, and the second supporting layer has higher elastic limit pressure and is used for providing a supporting effect for the first waterproof layer; the waterproof sound-transmitting membrane component can resist the influence of 1MPa (100 m water pressure), and can still play a role in waterproof sound transmission when the water pressure is 100m, so that the normal application of electronic equipment is ensured.)

1. A waterproof sound-transmitting membrane assembly, comprising a first waterproof layer and a second supporting layer, wherein a space d exists between the first waterproof layer and the second supporting layer, and the waterproof sound-transmitting membrane assembly is characterized in that: the first waterproof layer comprises a waterproof section, and the diameter and the length of the waterproof section are D;

when the water pressure of 1MPa is received, the relative deformation quantity E = (2D + AD)/D of the waterproof section is not larger than the elastic limit relative deformation quantity S of the waterproof section;

wherein A is the relative deformation of the second supporting layer under the action of 1MPa water pressure;

the elastic limit of the waterproof section is 1-30% relative to the deformation S.

2. A waterproof acoustically transparent membrane assembly as claimed in claim 1, in which: under the action of 1MPa water pressure, the relative deformation A of the second supporting layer is not more than 0.5 percent.

3. A waterproof acoustically transparent membrane assembly as claimed in claim 1, in which: the elastic limit pressure of the second supporting layer is 100-500MPa, and the elastic limit pressure of the first waterproof layer is 1-100 KPa.

4. The waterproof, acoustically transparent membrane assembly of claim 1, wherein: the interval d between first waterproof layer with the second supporting layer is 5um-400 um.

5. A waterproof acoustically transparent membrane assembly as claimed in claim 1, in which: the diameter and the length D of the waterproof section are 1.0mm-5.0 mm.

6. A waterproof acoustically transparent membrane assembly as claimed in claim 1, in which: the sound blocking amount of the waterproof sound-transmitting membrane component is 1.5-6dB in the sound frequency range of 100-10000 Hz.

7. The waterproof sound-transmitting membrane assembly of claim 6, wherein: the difference value of the sound blocking quantity of the waterproof sound-transmitting membrane component is less than 1dB in the sound frequency range of 100-10000Hz before and after 1MPa30min of water pressure.

8. A waterproof acoustically transparent membrane assembly as claimed in claim 7, in which: the first waterproof layer is made of ePTFE material; the second supporting layer is made of any one of polyimide materials, PET, PEEK, PE, PU and stainless steel.

9. A waterproof acoustically transparent membrane assembly as claimed in claim 1, in which: providing spacers around the perimeter of the first waterproof layer and the second support layer to maintain the spacing between the first waterproof layer and the second support layer; the spacer is a first adhesive, and the bonding strength between the first adhesive and the first waterproof layer is 5-50N/cm; the bonding strength between the first adhesive and the second support layer is 5-50N/cm.

10. A waterproof acoustically transparent membrane assembly as claimed in claim 1, in which: a second adhesive for adhering an external carrier is arranged on the first waterproof layer, and the bonding strength between the second adhesive and the first waterproof layer is 5-50N/cm; the bonding strength between the second adhesive and the external carrier is 5-50N/cm.

Technical Field

The invention relates to the technical field of membrane materials, in particular to a waterproof sound-transmitting membrane component capable of being normally used 100 meters underwater.

Background

The waterproof sound-transmitting membrane is a novel waterproof breathable material, and adopts a sound-transmitting material, so that the sound loss in the sound transmission process is reduced to the minimum; the current processes for preparing the waterproof sound-transmitting membrane mainly comprise the following steps: 1, carrying out tape casting compounding; 2, spraying glue or scraping glue for compounding; 3. hot-pressing and compounding, and the like. With the rapid development of electronic digital codes, the waterproof sound-transmitting membrane is widely applied; at present, waterproof sound-transmitting products are mainly applied to the fields of sensors, gas detectors, batteries, hearing aids, video cameras, digital cameras, underwater equipment, test instruments and the like.

Waterproof sound-transmitting membranes are generally installed on ports of electronic devices to serve as barriers against the entry of dust, water or other liquids, without causing a significant reduction in the transmission, integrity or quality of sound; the normal use of the electronic equipment is greatly ensured, and the service life of the electronic equipment is prolonged. For example, patent document 1, japanese unexamined patent publication No. 2003-503991, discloses a porous membrane obtained by stretching a sheet made of Polytetrafluoroethylene (PTFE); in japanese patent application laid-open No. 2004-83811 of patent document 2, a waterproof sound-transmitting film as a laminate comprising a plastic film and a support; in japanese patent application laid-open No. 2010-4397 of patent document 3, an acoustic member having a waterproof filter (waterproof sound-transmitting membrane) attached so as to cover a sound-transmitting hole of a case via an adhesive layer is also proposed.

Further chinese patent application No. 201080018126.1 discloses an acoustically resistive cover assembly comprising a first diffusion layer of porous polymeric material; a second water-repellent layer comprising a porous polymeric material; wherein a spacing of at least 0.25mm is provided between the first diffusion layer and the second water repellent layer such that the first diffusion layer does not contact the second water repellent layer, the airflow resistance of the acoustically resistive cover being less than 500 rayls; the acoustic resistance cover assembly has low acoustic resistance, can fully prevent water, dust or other liquid from entering, and ensures normal use of the electronic equipment.

When some scientific research tasks are carried out, scientific researchers often need to enter a place 100 meters or even deeper underwater for research, but at the moment, some waterproof sound-transmitting membranes are influenced by water pressure, irreversible deformation and even breakage can occur, and the waterproof sound-transmitting membranes can not play a role any more, so that electronic equipment can not be normally used, the efficiency of scientific research is greatly reduced, and the accuracy of the final result of the scientific research can also be influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a waterproof sound-transmitting membrane component which can be normally used 100 meters underwater, can resist the influence of 1MPa (100 meters water pressure), and can still play the role of waterproof sound transmission when the water pressure is 100 meters underwater, so that the normal application of electronic equipment is ensured.

In order to achieve the purpose, the invention provides the following technical scheme: a waterproof sound-transmitting membrane assembly comprises a first waterproof layer and a second supporting layer, wherein a gap D exists between the first waterproof layer and the second supporting layer, the first waterproof layer comprises a waterproof section, and the diameter and the length of the waterproof section are D;

when the waterproof section is subjected to water pressure of 1MPa, the relative deformation quantity E ═ 2D + AD)/D of the waterproof section is not more than the elastic limit relative deformation quantity S of the waterproof section;

wherein A is the relative deformation of the second supporting layer under the action of 1MPa water pressure;

the elastic limit of the waterproof section is 1-30% relative to the deformation S.

The waterproof sound-transmitting membrane assembly comprises a first waterproof layer and a second supporting layer, wherein the first waterproof layer is positioned on one side, close to the external environment, of the waterproof sound-transmitting membrane assembly, and has the characteristics of high hydrophobicity, heat-resisting stability, excellent chemical resistance, insulativity and the like, so that the dustproof effect can be achieved, the effect of preventing external water, acid liquor, alkali liquor and other liquids from entering a loudspeaker of electronic equipment can be achieved, the loudspeaker is prevented from being damaged, and the normal use of the electronic equipment is guaranteed;

however, if only the first waterproof layer is provided and the second supporting layer is not provided, when the water inlet pressure of 1MPa (pressure of 100 meters underwater) is applied, the first waterproof layer cannot bear the huge pressure alone, and the irreversible deformation and even breakage can occur, so that external liquid can still enter the loudspeaker to influence the normal use of the loudspeaker, and further influence the normal use of electronic equipment; therefore, the waterproof sound-transmitting membrane component is also provided with a second supporting layer, and the second supporting layer is positioned on one side, close to the loudspeaker, of the waterproof sound-transmitting membrane component and cannot be in direct contact with external liquid; the second supporting layer has certain hydrophilicity and cannot be independently used as a waterproof sound-transmitting membrane, but has larger elastic limit pressure, so that the second supporting layer can support the first waterproof layer, and can ensure that the first waterproof layer cannot generate irreversible deformation or even rupture when being subjected to the external pressure of 1MPa, thereby ensuring that the first waterproof layer can always play a role in preventing external liquid from entering the loudspeaker; a space d exists between the first waterproof layer and the second supporting layer, so that the first waterproof layer and the second supporting layer are not in direct contact; the space is used for providing a certain vibration space for the first waterproof layer and the second supporting layer, so that sound transmission is facilitated, and the loss of sound transmission is reduced; the first waterproof layer comprises a waterproof section, the waterproof section is a part of the first waterproof layer, and the waterproof section mainly plays a role in preventing external liquid from entering the loudspeaker; the diameter length of the waterproof section is D, namely the original length of the diameter of the waterproof section is D when the waterproof section is not under the action of external pressure, and the waterproof section can deform when the waterproof section is under the action of external liquid pressure; when the water inlet pressure is 1MPa, the deformation length of the waterproof section is 2d + AD, and 2d is 2 times of interval, because the waterproof section can be considered to be completely attached to the second supporting layer when the water inlet pressure is high; a is the relative deformation quantity of the second supporting layer when the water inlet pressure is 1MPa, because when the water inlet pressure is 1MPa, in order to enable the first waterproof layer to work normally, the second supporting layer can have a supporting force on the first waterproof layer so as to prevent the first waterproof layer from breaking, because the force action is mutual, the first waterproof layer can also have a corresponding acting force on the second supporting layer, under the action of the force, the second supporting layer can also deform to a certain extent, so that the deformation length of the waterproof section can also generate an extra deformation quantity except for 2d, and the extra deformation length is AD; the size of A is related to the elastic limit pressure of the second supporting layer, the larger the elastic limit pressure is, the smaller the A is, the smaller the elastic limit pressure is, and the larger the A is; the relative deformation quantity E of the waterproof section is not more than the elastic limit relative deformation quantity S of the waterproof section, and the range of the elastic limit relative deformation quantity S of the waterproof section is 1-30%; when the relative deformation S of the elastic limit is exceeded, the deformation of the waterproof section is not elastic deformation any more but irreversible deformation; the deformation ensures that the waterproof section cannot be restored to the original shape even when the waterproof section is not under the action of external pressure, namely the length of the waterproof section is no longer possible to be D, so that the waterproof sound transmission function of the waterproof sound transmission group is greatly influenced; the actual requirements can no longer be met; therefore, when the relative deformation of the waterproof section is not greater than the elastic limit relative deformation S, the waterproof sound-transmitting membrane component is ensured to have good sound transmission performance and strong waterproofness, the waterproof sound-transmitting membrane component can still normally play a role under the pressure action of 1MPa, the loudspeaker can be normally used, and then the normal operation of the electronic equipment is ensured.

As a further improvement of the invention, the relative deformation A of the second support layer is not more than 0.5% under the action of 1MPa water pressure.

Preferably, a is not more than 0.2%;

a is the relative deformation of the second supporting layer when the water inlet pressure is 1 MPa; the calculation formula of A is (L2-L1)/L1, wherein L1 is the original length of the second supporting layer when no external force is applied; l2 is the length of the second support layer when subjected to a pressure of 1 MPa; L2-L1 is the deformation length of the second supporting layer when the second supporting layer is under the action of 1MPa pressure; the size of A is irrelevant to the original length of the second supporting layer and is relevant to the elastic limit pressure of the second supporting layer, the larger the elastic limit pressure is, the smaller the A is, the smaller the elastic limit pressure is, and the larger the A is; when the waterproof sound-transmitting membrane is under the action of 1MPa pressure, the relative deformation A of the second supporting layer is not more than 0.5 percent, and the A ensures that the waterproof section cannot generate irreversible deformation or even fracture, thereby ensuring that the waterproof sound-transmitting membrane not only has good sound transmission performance, but also has strong waterproof performance.

As a further improvement of the invention, the elastic limit pressure of the second supporting layer is 100-500MPa, and the elastic limit pressure of the first waterproof layer is 1-100 KPa.

Preferably, the elastic limit pressure of the second supporting layer is 150-450MPa, and the elastic limit pressure of the first waterproof layer is 10-80KPa

The elastic limit refers to that when the material is acted on a certain limit by an external force, if the external force is removed, the deformation (elongation) of the material disappears and the material recovers to the original shape; if the external force action is continuously increased, the material can generate plastic deformation, namely irreversible deformation, and the material can not be restored to the original shape even if the external force is removed; the external force action of such magnitude is called elastic limit pressure; the method for testing the elastic limit relative deformation and the elastic limit pressure comprises the following steps: fixing a material to be detected on a stainless steel hydraulic tool through a stainless steel cover plate, wherein the stainless steel hydraulic tool and the stainless steel cover plate are both provided with circular openings with the diameter of 5mm and have the same position, then aligning the focus of an optical sensor with the brand of HK052 to the central position of a diaphragm, and reading an initial position b 0. And (3) increasing the regulating pressure valve to a preset pressure P1 at the speed of 20kPa/s for 1min, reading a position b1 corresponding to the water pressure deformation, then reducing the regulating pressure valve to completely remove the water pressure at the speed of 20kPa/s, and reading a position b2 after removing the water pressure. If the deviation between b2 and b0 is less than 2um, it can be determined that the pressure P1 is within the elastic pressure range of the material to be tested, (b1-b0)/5 is in the elastic relative deformation of the material. And increasing a preset pressure value by a ratio of 1%, and repeating the steps until the deviation amount of the position after the water pressure is removed and the initial position exceeds 2um under the condition of reaching the pressure Pn, wherein the pressure value Pm of a group before the pressure Pn condition is the elastic limit pressure, and (bm-b0)/5 under the condition of Pm is taken as the elastic limit relative deformation amount.

The waterproof section is a part of the first waterproof layer, and the waterproof section and the first waterproof layer have the same elastic limit stress and other properties; the second supporting layer and the first waterproof layer both have proper elastic limit pressure, so that the waterproof sound-transmitting membrane assembly can play a good waterproof sound-transmitting role.

As a further improvement of the invention, the interval d between the first waterproof layer and the second supporting layer is 5-400 um.

Preferably, the interval d between the first waterproof layer and the second supporting layer is 20-300um

The interval d is used for providing a certain vibration space for the first waterproof layer and the second supporting layer, so that sound transmission is facilitated, and the loss of sound transmission is reduced; when the interval is too small, namely the vibration space is too small, the transmission of sound is not facilitated, and the loss of sound transmission is increased; when the interval is too large, the deformation amount of the waterproof section is too large when the waterproof section is subjected to the water inlet pressure of 1MPa, so that the phenomenon of irreversible deformation and even breakage occurs; according to the invention, the interval d between the first waterproof layer and the second supporting layer is 5-400 um, so that the sound transmission is facilitated, and the sound loss is reduced; and the waterproof section can only elastically deform when the waterproof section is under the water inlet pressure of 1MPa, so that the waterproof transparent membrane assembly can be normally used.

As a further improvement of the invention, the diameter and the length D of the waterproof section are 1.0mm-5.0 mm.

Preferably, the diameter and the length D of the waterproof section are 1.5mm-4.5 mm.

If the diameter length of the waterproof section is too large, the installation of the waterproof sound-transmitting membrane component is not facilitated; the diameter of the waterproof section is too small, so that when the water inlet pressure is 1MPa, the relative deformation of the waterproof section is too large, the waterproof section is easy to deform irreversibly or break, and the waterproof section cannot work normally; the diameter and the length D of the waterproof section are 1.0-5.0 mm, so that the waterproof sound-transmitting membrane assembly is convenient to mount, the deformation of the waterproof section is elastic deformation when the water inlet pressure is 1MPa, and the normal use of the waterproof section is ensured.

As a further improvement of the invention, the sound blocking amount of the waterproof sound-transmitting membrane component in the sound frequency range of 100-10000Hz is 1.5dB-6 dB.

When sound penetrates through an object, certain loss occurs; the loss amount is actually the sound blocking amount of the object, the larger the sound blocking amount of the object is, the larger the sound loss is, and the smaller the sound blocking amount of the object is, the smaller the sound loss is; the method for testing the sound blocking quantity of the object comprises the following steps: punching an object to be tested into a wafer with the diameter of 5.0mm, concentrically stacking the punched material to be tested and an annular double-sided adhesive tape with the outer diameter of 5.0mm and the inner diameter of 1.7mm, wherein the thickness of the double-sided adhesive tape is 0.15mm, finally attaching the double-sided adhesive tape to a microphone test board with a sound outlet hole with the diameter of 1mm and the depth of 0.8mm, and selecting Lou's SPA1687LR5H as the simulation microphone. An artificial mouth is arranged 2cm away from the microphone tool. Both the analog microphone and the artificial mouth are connected to an Audio Precision x525 model Audio analyzer. The Audio testing software carried by the Audio preference is utilized to make the artificial mouth emit sound with the frequency of 100Hz-10000Hz and the sound pressure level of 94 dBSPL. And collecting the response signals of the microphone end under the conditions that the test component is mounted on the surface of the microphone tool and the test component is not mounted, and carrying out difference making to obtain the sound blocking quantity of the corresponding object finally. The sound blocking amount of the waterproof sound-transmitting membrane component is 1.5dB-6dB, namely the sound loss amount is 1.5dB-6dB when sound penetrates through the waterproof sound-transmitting membrane component, so that the waterproof sound-transmitting membrane component has excellent sound-transmitting performance and a large application range.

As a further improvement of the invention, the difference of the sound blocking quantity of the waterproof sound-transmitting membrane component in the sound frequency range of 100-10000Hz is less than 1dB before and after 1MPa30min of water pressure.

The waterproof sound-transmitting membrane component is not influenced by water pressure, and the sound blocking amount is H1 in the audio frequency range of 100-10000 Hz; the sound blocking amount of the waterproof sound-transmitting membrane component is H2 before and after 1MPa of 30min of water pressure, and the sound blocking amount under the sound frequency range of 100-10000Hz (the sound frequency is kept unchanged), and the difference value between H2 and H1 is less than 1dB, so that the influence of the sound-transmitting performance of the waterproof sound-transmitting membrane component on the water pressure is small, the sound-transmitting performance of the waterproof sound-transmitting membrane component is still good under the water pressure of 1MPa, and the waterproof transparent membrane can be normally used 100 meters underwater.

As a further improvement of the present invention, the first waterproof layer is an ePTFE material; the second supporting layer is made of any one of polyimide materials, PET, PEEK, PE, PU and stainless steel.

ePTFE material, also called expanded polytetrafluoroethylene, has a microporous structure on its surface, facilitating the transmission of sound; therefore, the acoustic resistance is very small; meanwhile, the ePTFE material is also a hydrophobic material, is acid-resistant and alkali-resistant, is not afraid of the erosion of external liquid, and protects the normal use of the loudspeaker; polyimide material, PET (polyethylene terephthalate) material, PEEK (polyether ether ketone) material, PE (polyethylene) material, PU (polyurethane) material and stainless steel all have great elasticity limit pressure, can provide the supporting role for first waterproof layer, guarantee that first waterproof layer can not take place irreversible deformation or break when receiving 1 MPa's pressure of intaking, after pressure disappears, first waterproof layer still can resume normally.

As a further development of the invention, the peripheries of the first waterproof layer and the second support layer are provided with spacers so as to maintain the spacing between the first waterproof layer and the second support layer; the spacer is a first adhesive, and the bonding strength between the first adhesive and the first waterproof layer is 5-50N/cm; the bonding strength between the first adhesive and the second support layer is 5-50N/cm.

Preferably, the bonding strength between the first adhesive and the first waterproof layer is 10-45N/cm; the bonding strength between the first adhesive and the second supporting layer is 10-45N/cm;

the first adhesive is a double-sided adhesive tape which can be a pressure-sensitive adhesive, a heat-sensitive adhesive, a photosensitive adhesive or other double-sided adhesive tapes, and the thickness of the first adhesive is the interval d; if the bonding strength between the first adhesive and the first waterproof layer and the bonding strength between the first adhesive and the second supporting layer are not large enough, the first adhesive and the first waterproof layer or the first adhesive and the second supporting layer can be separated when the water inlet pressure of 1MPa is applied, so that the first waterproof layer and the second supporting layer cannot have interaction, namely the second supporting layer cannot support the first waterproof layer; under the action of water pressure of 100 meters, the first waterproof layer can be broken, so that the liquid can damage the loudspeaker to a certain extent, and the electronic equipment can not work normally.

According to the invention, the first adhesive and the first waterproof layer, and the first adhesive and the second supporting layer have high bonding strength, and the combination is very tight; when the water is under the water inlet pressure of 1MPa, the separation is avoided, the waterproof sound-transmitting membrane component is ensured to have larger waterproofness, and the waterproof sound-transmitting membrane component can be normally used even in the water of 100 meters.

The method for testing the adhesive strength can be appropriately adjusted according to the method of ASTM D-3330. The adhesive was die cut into a strip 24mm wide and 300mm long, and one side of the adhesive was attached to a stainless steel plate. And then the supporting layer is punched into strips with the width of 24mm and the length of 325mm, the strips of the supporting layer are aligned with one end of the adhesive strip and then are laminated and adhered, the length of 25mm of the strips of the supporting layer is in a non-adhesion state, the adhered part is rolled by a press roll, one end of a stainless steel plate is placed into a movable nip of a tensile machine, the end of the supporting layer without the adhered part is placed into another nip, a control clamp is used for stretching towards two directions of 180 degrees at the speed of 5.0 +/-0.2 mm/s, the tensile value within the displacement distance range of 25mm-75mm is counted and averaged, and the value is calculated as the adhesion strength value.

As a further improvement of the invention, a second adhesive for adhering an external carrier is arranged on the first waterproof layer, and the bonding strength between the second adhesive and the first waterproof layer is 5-50N/cm; the bonding strength between the second adhesive and the external carrier is 5-50N/cm.

Preferably, the bonding strength between the second adhesive and the first waterproof layer is 15-40N/cm; the bonding strength between the second adhesive and the external carrier is 15-45N/cm.

The second adhesive is a double-sided adhesive tape which can be a pressure-sensitive adhesive, a heat-sensitive adhesive, a photosensitive adhesive or other double-sided adhesive tapes; if the bonding strength between the second adhesive and the external carrier is not large enough between the second adhesive and the first waterproof layer, when the water inlet pressure of 1MPa is applied, the second adhesive and the first waterproof layer or the second adhesive and the external carrier are separated, namely, the waterproof sound-transmitting membrane assembly is separated from the external carrier and cannot play a waterproof role any more, then external liquid can be directly contacted with the loudspeaker, so that the loudspeaker is damaged to a certain extent, and the electronic equipment cannot work normally. The bonding strength between the second adhesive and the first waterproof layer and the bonding strength between the second adhesive and the external carrier are both high, so that the waterproof sound-transmitting membrane component can be tightly attached to the external carrier, and a good waterproof sound-transmitting effect is achieved.

The invention has the beneficial effects that: the waterproof sound-transmitting membrane comprises a first waterproof layer and a second supporting layer, wherein the first waterproof layer has the characteristics of high hydrophobicity, heat-resistant stability, excellent chemical resistance, insulativity and the like, and the second supporting layer has larger elastic limit pressure and is used for providing a supporting effect for the first waterproof layer; the waterproof sound-transmitting membrane component can resist the influence of 1MPa (100 m water pressure), and can still play a role in waterproof sound transmission when the water pressure is 100m, so that the normal application of electronic equipment is ensured.

Drawings

FIG. 1 is a schematic structural view of a waterproof sound-transmitting membrane module according to example 1 of the present invention when not subjected to a pressure;

FIG. 2 is a schematic structural diagram of the waterproof sound-transmitting membrane module according to embodiment 1 of the present invention under the action of water pressure of 1 MPa;

FIG. 3 is a schematic diagram of a device for testing the performance of the elastic limit pressure and the elastic limit relative deformation of a material;

FIG. 4 is a schematic view of a device for testing the sound blocking amount of a material;

reference numerals: 1. a second support layer; 2. a first adhesive; 3. a first waterproof layer; 4. a second adhesive.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.