CN107187119B - Waterproof sound-transmitting membrane and mobile phone - Google Patents
Waterproof sound-transmitting membrane and mobile phone Download PDFInfo
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- CN107187119B CN107187119B CN201710475659.6A CN201710475659A CN107187119B CN 107187119 B CN107187119 B CN 107187119B CN 201710475659 A CN201710475659 A CN 201710475659A CN 107187119 B CN107187119 B CN 107187119B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/73—Hydrophobic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
Abstract
The invention discloses a waterproof sound-transmitting membrane and a mobile phone, wherein the waterproof sound-transmitting membrane comprises a substrate layer, a buffer layer and a sound-transmitting membrane layer; the sound-transmitting film is laminated on the back surface of the base material layer; the buffer layer comprises a first layer and a second layer connected with the first layer, the first layer is provided with a water inlet hole, the second layer is provided with a water outlet hole communicated with the water inlet hole, and the distance between the water inlet hole and the axial lead of the water inlet hole is larger than or equal to the sum of the radiuses of the water inlet hole and the water inlet hole when seen along the entering direction of water flow; the second layer is laminated on the front surface of the substrate layer. The distance between the water inlet and the water inlet is larger than or equal to the sum of the radiuses of the water inlet and the water inlet when seen along the entering direction of the water flow, so that the water flow enters from the water inlet, passes through the channels of the water inlet and the water outlet and then exits from the water outlet, but does not directly exit from the water outlet. In addition, the waterproof sound-transmitting membrane further comprises a sound-transmitting membrane layer, so that the sound-transmitting performance of the waterproof sound-transmitting membrane is improved.
Description
Technical Field
The invention relates to the technical field of filtering membranes, in particular to a waterproof sound-transmitting membrane and a mobile phone.
Background
Nowadays, electronic devices such as mobile phones, notebook computers, interphones, bluetooth headsets, outdoor monitors and the like are becoming more and more popular, and in order to reduce damage to the electronic devices caused by water for water sports, outdoor environments and daily life, a waterproof sound-transmitting membrane is usually assembled at a loudspeaker, a microphone or a receiver of the electronic devices.
The waterproof sound-transmitting membrane sold in the market at present is mainly made of ePTFE or PU, and the general waterproof sound-transmitting membrane can meet the waterproof grade requirement of IPX7 but cannot meet the waterproof grade requirement of IPX5 or IPX 6. Because water directly rushes onto the waterproof acoustically transparent membrane when IPX5 or IPX6 is tested, the membrane will delaminate or water will penetrate the membrane into the cavity causing the test to fail.
Chinese patent publication No. CN201080002329.1, publication No. 2011, 7 and 13, entitled waterproof sound-transmitting membrane, which comprises a PTFE porous membrane, and is improved in performance from the first porous layer and a second porous layer laminated and integrated with the first porous layer based on bonding force acting between the PTFE substrates. The disadvantage is that the waterproof sound-transmitting membrane of the double-layer structure is partially affected in sound-transmitting performance although it is improved in water resistance.
Therefore, how to make the waterproof grade of the waterproof sound-transmitting membrane reach the waterproof grade of IPX5, IPX6 and IPX7 and reduce the influence on the sound-transmitting performance is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
A first object of the present invention is to provide a waterproof sound-transmitting membrane which can achieve the waterproof level of IPX5, IPX6, IPX7 and reduce the influence on sound-transmitting performance.
A second object of the present invention is to provide a mobile phone.
In order to achieve the first object, the present invention provides the following solutions:
a waterproof sound-transmitting membrane comprises a substrate layer, a buffer layer and a sound-transmitting membrane layer;
the sound-transmitting film is laminated on the back surface of the substrate layer;
the buffer layer comprises a first layer and a second layer connected with the first layer, a water inlet hole is formed in the first layer, and a water outlet hole communicated with the water inlet hole is formed in the second layer;
along the entering direction of the water flow, the distance between the axial lead of the water outlet hole and the axial lead of the water inlet hole is larger than or equal to the sum of the radiuses of the water outlet hole and the axial lead of the water inlet hole;
the second layer is laminated on the front surface of the substrate layer.
Preferably, in the waterproof sound-transmitting membrane described above, a plurality of protrusions are provided on a face of the first layer facing the second layer.
Preferably, in the waterproof sound-transmitting film described above, the outer edge of the first layer and the outer edge of the second layer are sealed by hot melt welding.
Preferably, in the waterproof sound-transmitting membrane, the substrate layer is a double-sided backing adhesive layer.
Preferably, in the waterproof sound-transmitting membrane, the buffer layer is a buffer plastic layer.
Preferably, in the waterproof sound-transmitting membrane, the buffer plastic layer is a plastic layer of one or more plastics of PET, PC, nylon, PBT, PP, PE.
Preferably, in the waterproof sound-transmitting film, the substrate layer is one or more substrate layers of PET, PC, nylon, PBT, PP, PE.
Preferably, in the waterproof sound-transmitting membrane, the sound-transmitting membrane layer is an ePTFE or PU sound-transmitting membrane layer.
Preferably, in the waterproof sound-transmitting membrane, the sound-transmitting membrane layer can reduce the sound attenuation to 3dB for the frequency of 500-5000Hz under the condition of 0.5 square centimeter of effective area, and the sound-transmitting membrane layer can reduce the sound attenuation to 5dB for the frequency of 500-5000Hz under the condition of 0.7 square centimeter of effective area.
According to the technical scheme, water flow enters from the water inlet hole of the buffer layer and exits from the water outlet hole of the buffer layer, and the axial line distance between the water inlet hole and the water inlet hole is larger than or equal to the sum of the radiuses of the water inlet hole and the water inlet hole when seen along the water flow entering direction, so that the water flow enters from the water inlet hole, passes through the channels of the water inlet hole and the water outlet hole and then exits from the water outlet hole, and cannot directly exit from the water outlet hole. In addition, the waterproof sound-transmitting membrane provided by the invention further comprises a sound-transmitting membrane layer, so that the sound-transmitting performance of the waterproof sound-transmitting membrane is improved.
In summary, the waterproof sound-transmitting membrane provided by the invention can enable the waterproof grade of the waterproof sound-transmitting membrane to reach the waterproof grade of IPX5, IPX6 and IPX7, and can reduce the influence on sound-transmitting performance.
In order to achieve the second object, the present invention provides the following solutions:
a mobile phone, wherein an opening of a loudspeaker is formed in a shell of the mobile phone, the waterproof sound-transmitting membrane is connected with the shell, and the outer diameter of the waterproof sound-transmitting membrane is larger than the inner diameter of the opening.
According to the technical scheme, the waterproof sound-transmitting membrane is stuck to the loudspeaker opening of the mobile phone, and the outer diameter of the waterproof sound-transmitting membrane is larger than the inner diameter of the opening, so that the waterproof sound-transmitting membrane can prevent water or dust from entering the inside of the shell, and the loudspeaker is protected.
The water directly rushes onto the buffer membrane during IPX5, IPX6 testing, but not directly onto the acoustically transparent membrane layer. Therefore, the requirement of the waterproof sound-transmitting membrane on pressure bearing is reduced, and the sound-transmitting membrane with good sound-transmitting performance can be selected.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a waterproof sound-transmitting membrane provided by the invention;
FIG. 2 is a schematic diagram of a buffer layer according to the present invention;
FIG. 3 is a schematic view of a second layer according to the present invention;
FIG. 4 is a schematic view of a first layer according to the present invention;
fig. 5 is a schematic structural diagram of a mobile phone according to the present invention;
fig. 6 is a schematic cross-sectional structure of a mobile phone according to the present invention.
Wherein in fig. 1-6:
a base material layer 1, a buffer layer 2, an acoustic membrane layer 3, a first layer 201, a second layer 202, a water inlet 203, a water outlet 204, a bulge 4, a mobile phone shell 5 and an opening 6.
Detailed Description
The present invention will be further described in detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present invention to those skilled in the art.
Noun interpretation:
IPX5: it means that the water flushing has no harm to the waterproof sound-transmitting membrane.
IPX6: can be used in the cabin environment.
IPX7: can resist soaking in short time.
Example 1
Referring to fig. 1-4, the invention discloses a waterproof sound-transmitting membrane, which comprises a substrate layer 1, a buffer layer 2 and a sound-transmitting membrane layer 3. Wherein, buffer layer 2 can cushion the impact of rivers, and sound transmission membrane layer 3 can improve the sound transmission performance.
The buffer layer 2 is laminated on the front surface of the base material layer 1, and the sound-transmitting film layer 3 is laminated on the back surface of the base material layer 1. Here, the front surface of the base material layer 1 means a surface facing the inflow direction of the water flow, and the back surface of the base material layer 1 means a surface facing away from the inflow direction of the water flow.
The buffer layer 2 is divided into two layers, namely a first layer 201 and a second layer 202, specifically the second layer 202 is laminated on the front surface of the substrate layer 1. The first layer 201 is provided with a plurality of water inlets 203, and the number of the water inlets 203 is plural in order to disperse the strength of the water impact. The second layer 202 is provided with a plurality of water outlets 204 communicated with the water inlet 203, and the number of the water outlets 204 is also a plurality.
The distance between the axial lead of the water outlet 204 and the axial lead of the water inlet 203 is larger than or equal to the sum of the radii of the water outlet 204 and the water inlet 203, namely, the water inlet 203 and the water outlet 204 are not overlapped when seen along the water inlet direction, so that the water pressure impact caused by the direct water flow entering from the water inlet 203 and exiting from the water outlet 204 is reduced.
According to the waterproof sound-transmitting membrane provided by the invention, water flows enter from the water inlet hole 203 of the buffer layer 2 and exit from the water outlet hole 204 of the buffer layer 2, and the distance between the water inlet hole 204 and the axial lead of the water inlet hole 203 is larger than or equal to the sum of the radiuses of the water inlet hole 204 and the water outlet hole 203 when seen along the water flow entering direction, so that the water flows enter from the water inlet hole 203, pass through the channels of the water inlet hole 203 and the water outlet hole 204 and then exit from the water outlet hole 204, and can not directly exit from the water outlet hole 204. In addition, the waterproof sound-transmitting membrane provided by the invention further comprises the sound-transmitting membrane layer 3, so that the sound-transmitting performance of the waterproof sound-transmitting membrane is improved.
In conclusion, the waterproof sound-transmitting membrane provided by the invention can enable the waterproof grade of the waterproof sound-transmitting membrane to reach the waterproof grade of IPX5, IPX6 and IPX7, and can reduce the influence on sound-transmitting performance.
Example two
In another embodiment of the present invention, the waterproof sound-transmitting membrane in this embodiment has a similar structure to that of the waterproof sound-transmitting membrane in the first embodiment, and the same points will not be described again, but only the differences will be described.
In the waterproof sound-transmitting membrane, a plurality of protrusions 4 are arranged on the surface of the first layer 201 facing the second layer 202, and the protrusions 4 can form a certain gap between the first layer 201 and the second layer 202 to further buffer water pressure. It is also possible to provide a plurality of protrusions 4 on the side of the second layer 202 facing the first layer 201.
Further, the present invention discloses that the outer edges of the first layer 201 and the second layer 202 are sealed by hot melt welding. The connection fastness of the hot-melt welding is strong, and the connection firmness of the first layer 201 and the second layer 202 can be increased.
In order to facilitate the lamination of the buffer layer 2 and the sound-transmitting film layer 3 on the substrate layer 1, the invention discloses that the substrate layer 1 is a double-sided adhesive tape, and the connection of the buffer layer 2 and the sound-transmitting layer is realized through the double-sided adhesive tape.
The invention also discloses that the buffer layer 2 is a buffer plastic layer, and the plastic is common and cheap, therefore, the buffer layer 2 is preferably a buffer plastic layer, and it should be noted that the buffer layer 2 disclosed by the invention is not limited to the disclosed plastic layer, and other buffer layers 2 made of buffer materials with buffer effect belong to the protection scope of the invention.
Further, the invention specifically discloses a plastic layer composed of one or more plastics with a buffer plastic layer of PET, PC, nylon, PBT, PP, PE. The substrate layer 1 is a substrate layer composed of one or more of PET, PC, nylon, PBT, PP, PE. The sound-transmitting membrane layer 3 is made of ePTFE or PU.
The invention also discloses a waterproof sound-transmitting membrane, wherein the sound-transmitting membrane can reduce the sound attenuation of 500-5000Hz to 3dB under the condition of 0.5 square centimeter of effective area, and the sound-transmitting membrane can reduce the sound attenuation of 500-5000Hz to 5dB under the condition of 0.7 square centimeter of effective area.
The water-proof sound-transmitting film disclosed by the invention has the advantages that water flows onto the buffer layer 2, enters from the water inlet of the first layer 201, passes through the space formed by the first layer 201 and the second layer 202, and exits from the water outlet of the second layer 202. Since the first layer 201 is provided with a plurality of protrusions 4 on the side facing the second layer 202, the impact of the water flow can be further buffered. In addition, the invention specifically discloses that the sound-transmitting film layer can reduce the sound attenuation to 3dB for the frequency of 500-5000Hz under the condition of 0.5 square centimeter of effective area, and the sound-transmitting film layer 3 can reduce the sound attenuation to 5dB for the frequency of 500-5000Hz under the condition of 0.7 square centimeter of effective area.
Therefore, the waterproof sound-transmitting membrane provided by the invention has a certain buffering effect on water pressure, and the sound-transmitting performance of the waterproof sound-transmitting membrane is improved.
In conclusion, the waterproof sound-transmitting membrane provided by the invention can enable the waterproof grade of the waterproof sound-transmitting membrane to reach the waterproof grade of IPX5, IPX6 and IPX7, and can reduce the influence on sound-transmitting performance.
Example III
As shown in fig. 5-6, the present invention discloses a mobile phone, in which a casing 5 of the mobile phone is provided with an opening 6 of a loudspeaker, a waterproof sound-transmitting membrane in any one of the embodiments is connected to the casing 5, specifically, the casing 5 and the waterproof sound-transmitting membrane are connected by a double-sided adhesive tape, and an outer diameter of the waterproof sound-transmitting membrane is larger than an inner diameter of the opening 6.
According to the mobile phone provided by the invention, the waterproof sound-transmitting membrane is stuck on the loudspeaker opening 6, and the outer diameter of the waterproof sound-transmitting membrane is larger than the inner diameter of the opening 6, so that the waterproof sound-transmitting membrane can prevent water or dust from entering the inside of the shell, and the loudspeaker is protected.
At the time of IPX5, IPX6 test, water directly rushes onto the buffer film, but not directly onto the acoustically transparent film layer 3. Therefore, the requirement of the waterproof sound-transmitting membrane on pressure bearing is reduced, and the sound-transmitting membrane with good sound-transmitting performance can be selected.
It should be noted that the waterproof sound-transmitting membrane disclosed by the invention is not limited to being applied to a mobile phone, and can also be electronic equipment such as a notebook computer, an interphone, a Bluetooth earphone, an outdoor monitor and the like. The present embodiment will be described by taking a mobile phone as an example.
The terms "first", "second", and the like in the present invention are used for descriptive purposes and are not intended to have any particular meaning.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.
Claims (9)
1. The waterproof sound-transmitting membrane is characterized by comprising a substrate layer (1), a buffer layer (2) and a sound-transmitting membrane layer (3);
the sound-transmitting film layer (3) is pressed on the back surface of the base material layer (1);
the buffer layer (2) comprises a first layer (201) and a second layer (202) connected with the first layer (201), wherein a water inlet hole (203) is formed in the first layer (201), and a water outlet hole (204) communicated with the water inlet hole (203) is formed in the second layer (202);
along the entering direction of the water flow, the distance between the axial lead of the water outlet hole (204) and the axial lead of the water inlet hole (203) is larger than or equal to the sum of the radiuses of the water outlet hole and the water inlet hole;
the second layer (202) is pressed on the front surface of the substrate layer (1);
the first layer (201) is provided with a plurality of protrusions (4) on the side facing the second layer (202).
2. The waterproof sound-transmitting membrane according to claim 1, characterized in that the outer edge of the first layer (201) and the outer edge of the second layer (202) are sealed by hot melt welding.
3. The waterproof sound-transmitting membrane according to claim 1, characterized in that the substrate layer (1) is a double-sided backing layer.
4. The waterproof sound-transmitting membrane according to claim 1, characterized in that the buffer layer (2) is a buffer plastic layer.
5. The waterproof sound-transmitting membrane of claim 4, wherein the cushioning plastic layer is a plastic layer of one or more plastics of PET, PC, nylon, PBT, PP, PE.
6. The waterproof sound-transmitting membrane according to claim 1, characterized in that the substrate layer (1) is one or more substrate layers of PET, PC, nylon, PBT, PP, PE.
7. The waterproof sound-transmitting membrane according to any one of claims 1 to 6, characterized in that the sound-transmitting membrane layer (3) is an ePTFE or PU sound-transmitting membrane layer.
8. The waterproof sound-transmitting membrane according to claim 1, characterized in that the sound-transmitting membrane layer (3) is capable of reducing 3dB for sound attenuation at frequencies 500-5000Hz at an effective area of 0.5 square cm, and the sound-transmitting membrane layer (3) is capable of reducing 5dB for sound attenuation at frequencies 500-5000Hz at an effective area of 0.7 square cm.
9. A mobile phone, the housing (5) of which is provided with an opening (6) for a loudspeaker, characterized in that a waterproof sound-transmitting membrane according to any one of claims 1-8 is connected to the housing, and that the outer diameter of the waterproof sound-transmitting membrane is larger than the inner diameter of the opening (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710475659.6A CN107187119B (en) | 2017-06-21 | 2017-06-21 | Waterproof sound-transmitting membrane and mobile phone |
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| CN201710475659.6A CN107187119B (en) | 2017-06-21 | 2017-06-21 | Waterproof sound-transmitting membrane and mobile phone |
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| CN108559418A (en) * | 2018-06-28 | 2018-09-21 | 上海市凌桥环保设备厂有限公司 | A kind of mobile phone breathable waterproof membrane and its preparation process |
| CN109660649A (en) * | 2019-01-17 | 2019-04-19 | 珠海格力电器股份有限公司 | Loudspeaker assembly, mobile terminal |
| CN111615023B (en) * | 2020-05-22 | 2022-08-02 | 杭州安普鲁薄膜科技有限公司 | Waterproof sound-transmitting membrane assembly |
| CN112929798B (en) * | 2021-01-29 | 2022-11-01 | 杭州安普鲁薄膜科技有限公司 | Waterproof sound-transmitting membrane assembly and MEMS (micro-electromechanical system) with same |
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| CN207256983U (en) * | 2017-06-21 | 2018-04-20 | 杭州科百特过滤器材有限公司 | A kind of waterproof sound passing membrane and mobile phone |
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| ATA32591A (en) * | 1991-02-15 | 1993-11-15 | Just Guenter | SOUNDPROOFING COVER, IN PARTICULAR FOR SPEAKERS |
| JP3812892B2 (en) * | 2002-02-25 | 2006-08-23 | 日東電工株式会社 | Breathable sound-permeable membrane |
| CN105706459B (en) * | 2013-11-07 | 2019-07-30 | 日东电工株式会社 | Waterproof sound passing membrane and electronic equipment |
| JP2016100813A (en) * | 2014-11-25 | 2016-05-30 | 日東電工株式会社 | Water proof sound passing membrane, water proof sound passing member including the same, electronic apparatus, case for the same, and water proof sound passing structure |
| CN205425332U (en) * | 2016-03-23 | 2016-08-03 | 陆有军 | Water cold -storage decompression buffering mixed plate |
| CN205705607U (en) * | 2016-04-14 | 2016-11-23 | 杭州安普鲁薄膜科技有限公司 | A kind of waterproof and breathable pad pasting |
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| CN207256983U (en) * | 2017-06-21 | 2018-04-20 | 杭州科百特过滤器材有限公司 | A kind of waterproof sound passing membrane and mobile phone |
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