MIC waterproof membrane

Abstract

The utility model discloses an MIC waterproof membrane which comprises a mobile phone shell, two adhesive connecting plates are arranged on the inner side of a sound outlet hole of the mobile phone shell, a waterproof breathable sound transmission membrane is arranged between the two adhesive connecting plates, the two adhesive connecting plates are respectively a waterproof double-faced adhesive tape and sound absorption foam from bottom to top, and positioning grooves are formed in the inner sides of the waterproof double-faced adhesive tape and the sound absorption foam. A through groove is formed in the inner side of the positioning groove in a penetrating mode, the waterproof breathable sound-transmitting film is clamped into the positioning groove and then adheres to the two adhesive connecting plates, and the waterproof double-faced adhesive tape adheres to the mobile phone shell. The waterproof sound-permeable fabric has the advantages of being good in waterproof effect and good in air-permeable sound-permeable effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of airtight detection, and in particular relates to a MIC waterproof membrane. Background Art

[0002] With the continuous development of society, smart electronic communication devices such as smart phones and smart tablets have become a tool that almost everyone has in their hands. According to the current living habits, waterproofing has become an indispensable basic requirement in our lives. In the waterproof design of smart electronic communications, it is necessary to consider the overall structural waterproof sealing of the product shell, and at the same time, it is necessary to set corresponding waterproof and breathable membranes at the sound input openings, the sound output openings, and the air pressure balance openings, so as to achieve waterproofness of smart hardware while ensuring its functionality.

[0003] The earpiece of a common mobile phone is usually a weak point in waterproofing. It needs to be protected by a waterproof and breathable product that is waterproof, dustproof, corrosion-resistant, resistant to environmental climate changes, and has excellent breathability. This can ensure its reliable performance, long service life, high stability, and reduced maintenance costs. Utility Model Content

[0004] The purpose of the utility model is to provide a MIC waterproof membrane in order to solve the problem that the waterproof effect of common waterproof products at the handset of a mobile phone is weak.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: it includes a mobile phone shell, two adhesive connecting plates are arranged on the inner side of the sound outlet hole of the mobile phone shell, a waterproof, breathable and sound-permeable membrane is arranged between the two adhesive connecting plates, the two adhesive connecting plates are respectively waterproof double-sided adhesive and sound-absorbing foam from bottom to top, the inner sides of the waterproof double-sided adhesive and the sound-absorbing foam are both provided with positioning grooves, the inner sides of the positioning grooves are penetrated by a through groove, the waterproof, breathable and sound-permeable membrane is stuck in the positioning groove and then bonded to the two adhesive connecting plates, and the waterproof double-sided adhesive is bonded to the mobile phone shell.

[0006] Furthermore, the waterproof, breathable and sound-permeable membrane includes, from bottom to top, a first layer of membrane, a second layer of membrane, a third layer of membrane and a fourth layer of membrane.

[0007] Furthermore, the first layer of film is PP spunbonded nonwoven fabric, the thickness of the first layer of film is 10-15 μm, and the diameter of the micropores of the first layer of film is 0.2-1 μm.

[0008] Furthermore, the second layer of membrane is an ePTFE polymer membrane, the thickness of the second layer of membrane is 8 to 10 μm, and the diameter of the micropores of the second layer of membrane is 0.03 to 1 μm.

[0009] Furthermore, the third film layer is a PET film, the thickness of the third film layer is 5 to 8 μm, and the diameter of the micropores of the third film layer is 0.1 to 1 μm.

[0010] Furthermore, the fourth film layer is a starch-based film, the thickness of the fourth film layer is 10-15 μm, and the diameter of the micropores of the fourth film layer is 0.2-1 μm.

[0011] Furthermore, the microporous structure of the waterproof, breathable and sound-permeable membrane is a three-dimensional mesh structure.

[0012] Preferably, the diameter of the micropores is 10,000 times smaller than that of water droplets, and the pore size of the micropores is 700 times larger than that of water vapor.

[0013] Beneficial effects: The utility model has reasonable design and has the following beneficial effects:

[0014] 1. In the present invention, the diameter of the micropores is 10,000 times smaller than that of water droplets, and the diameter of the micropores is 700 times larger than that of water vapor, so as to block the liquid from passing through, prevent the liquid from invading the inside of the mobile phone from the sound outlet, effectively protect sensitive components, and increase the service life of electronic components. At the same time, it can also block water vapor to prevent fogging inside the mobile phone and allow air to pass smoothly, which can not only effectively transmit sound, but also balance the air pressure inside and outside the space;

[0015] 2. In the scheme of the utility model, the PP spunbond non-woven fabric in the waterproof, breathable and sound-permeable membrane blocks part of the liquid, water vapor and particles at the bottom layer, the ePTFE polymer membrane blocks most of the water and water vapor, and has good air permeability to facilitate the transmission of sound, the PET membrane filters the water vapor that passes through again, and the starch-based film absorbs the trace water vapor that passes through, and then slowly dries it through the heat inside the mobile phone, so as to block the liquid and prevent the water from passing through;

[0016] 3. In the present invention, the microporous structure of the waterproof, breathable and sound-permeable membrane is a three-dimensional mesh structure, which is convenient for effective dust prevention and captures and blocks smaller particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is an exploded view of the local structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the waterproof, breathable and sound-permeable membrane of the utility model.

[0020] In the figure: 1- mobile phone housing, 2- glued board, 3- waterproof, breathable and sound-permeable membrane;

[0021] 21-waterproof double-sided tape, 22-sound-absorbing foam, 23-positioning groove, 24-through groove, 31-first layer of membrane, 32-second layer of membrane, 33-third layer of membrane, 34-fourth layer of membrane. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Combination Figures 1 to 3 The MIC waterproof membrane shown includes a mobile phone shell 1, two adhesive plates 2 are arranged on the inner side of the sound outlet of the mobile phone shell 1, a waterproof breathable sound-permeable membrane 3 is arranged between the two adhesive plates 2, the two adhesive plates 2 are respectively waterproof double-sided adhesive 21 and sound-absorbing foam 22 from bottom to top, the inner sides of the waterproof double-sided adhesive 21 and the sound-absorbing foam 22 are both provided with positioning grooves 23, and the inner side of the positioning grooves 23 is penetrated by a through groove 24, the waterproof breathable sound-permeable membrane 3 is stuck in the positioning grooves 23 and then bonded to the two adhesive plates 2, and the waterproof double-sided adhesive 21 is bonded to the mobile phone shell 1.

[0024] The waterproof, breathable and sound-permeable membrane 3 includes, from bottom to top, a first membrane layer 31 , a second membrane layer 32 , a third membrane layer 33 and a fourth membrane layer 34 .

[0025] The first layer of film 31 is PP spunbond nonwoven fabric, the thickness of the first layer of film 31 is 10-15 μm, the diameter of the micropores of the first layer of film 31 is 0.2-1 μm, and the first layer of film 31 PP spunbond nonwoven fabric intercepts part of the liquid, water vapor and particles at the bottom layer.

[0026] The second layer of membrane 32 is an ePTFE polymer membrane, the thickness of the second layer of membrane 32 is 8-10 μm, the diameter of the micropores of the second layer of membrane 32 is 0.03-1 μm, and the second layer of membrane 32 ePTFE polymer membrane blocks most of the moisture and water vapor.

[0027] The third film 33 is a PET film, the thickness of the third film 33 is 5-8 μm, the diameter of the micropores of the third film 33 is 0.1-1 μm, and the third film 33 PET film filters the water vapor passing through again.

[0028] The fourth film 34 is a starch-based film with a thickness of 10-15 μm and a micropore diameter of 0.2-1 μm. The starch-based film of the fourth film 34 absorbs the trace amount of water vapor passing through and then slowly dries it with the heat inside the mobile phone.

[0029] The microporous structure of the waterproof, breathable and sound-permeable membrane 3 is a three-dimensional mesh structure, which is convenient for effective dust prevention and captures and blocks smaller particles.

[0030] The diameter of the micropores is 10,000 times smaller than that of water droplets, and the aperture of the micropores is 700 times larger than that of water vapor, so as to block liquids from passing through and prevent liquids from invading the inside of the phone from the sound holes, effectively protecting sensitive components and increasing the service life of electronic components. At the same time, it can also block water vapor to avoid fogging inside the phone and allow air to pass smoothly, which can not only effectively transmit sound, but also balance the air pressure inside and outside the space.

[0031] Working principle: When the utility model is in use, through the cooperation of the first layer of membrane 31, the second layer of membrane 32, the third layer of membrane 33 and the fourth layer of membrane 34, the first layer of membrane 31PP spunbonded non-woven fabric blocks part of the liquid, water vapor and particles at the bottom layer, the second layer of membrane 32ePTFE polymer membrane blocks most of the water and water vapor, and has good air permeability to facilitate the transmission of sound, and the ePTFE polymer membrane has the characteristics of acid and alkali resistance and resistance to various organic solvents, is almost insoluble in solvents, and has good air permeability, and the third layer of membrane 33PET membrane filters the water vapor passing through again Finally, the fourth layer of membrane 34, the starch-based film, absorbs the trace amount of water vapor that passes through, and then slowly dries it with the heat inside the mobile phone. The positioning groove facilitates the positioning and installation of the waterproof, breathable and sound-permeable membrane 3. The diameter of the micropores is 10,000 times smaller than that of water droplets, and the diameter of the micropores is 700 times larger than that of water vapor, so as to block the liquid from passing through and prevent the liquid from invading the interior of the mobile phone from the sound outlet, effectively protecting sensitive components and increasing the service life of electronic components. At the same time, it can also block water vapor to avoid fogging inside the mobile phone and allow air to pass smoothly, which can not only effectively transmit sound, but also balance the air pressure inside and outside the space.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. MIC waterproof membrane, including a mobile phone housing (1), characterized in that: Two adhesive plates (2) are arranged inside the sound outlet of the mobile phone housing (1), a waterproof, breathable and sound-permeable membrane (3) is arranged between the two adhesive plates (2), the two adhesive plates (2) are respectively provided with a waterproof double-sided adhesive tape (21) and a sound-absorbing foam (22) from bottom to top, the inner sides of the waterproof double-sided adhesive tape (21) and the sound-absorbing foam (22) are both provided with a positioning groove (23), the inner side of the positioning groove (23) is penetrated by a through groove (24), the waterproof, breathable and sound-permeable membrane (3) is inserted into the positioning groove (23) and then bonded to the two adhesive plates (2), and the waterproof double-sided adhesive tape (21) is bonded to the mobile phone housing (1); The waterproof, breathable and sound-permeable membrane (3) comprises, from bottom to top, a first membrane layer (31), a second membrane layer (32), a third membrane layer (33) and a fourth membrane layer (34); The first layer of film (31) is a PP spunbonded nonwoven fabric, the thickness of the first layer of film (31) is 10 to 15 μm, and the diameter of the micropores of the first layer of film (31) is 0.2 to 1 μm; The second layer of film (32) is an ePTFE polymer film, the thickness of the second layer of film (32) is 8 to 10 μm, and the diameter of the micropores of the second layer of film (32) is 0.03 to 1 μm.

2. The MIC waterproof membrane according to claim 1, characterized in that: The third film layer (33) is a PET film, the thickness of the third film layer (33) is 5 to 8 μm, and the diameter of the micropores of the third film layer (33) is 0.1 to 1 μm.

3. The MIC waterproof membrane according to claim 2, characterized in that: The fourth film (34) is a starch-based film, the thickness of the fourth film (34) is 10 to 15 μm, and the diameter of the micropores of the fourth film (34) is 0.2 to 1 μm.

4. The MIC waterproof membrane according to claim 3, characterized in that: The microporous structure of the waterproof, breathable and sound-permeable membrane (3) is a three-dimensional mesh structure.

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