CN112423192A - Waterproof sound-transmitting membrane structure with high protection performance and high sound-transmitting performance - Google Patents
Waterproof sound-transmitting membrane structure with high protection performance and high sound-transmitting performance Download PDFInfo
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- CN112423192A CN112423192A CN202011168066.3A CN202011168066A CN112423192A CN 112423192 A CN112423192 A CN 112423192A CN 202011168066 A CN202011168066 A CN 202011168066A CN 112423192 A CN112423192 A CN 112423192A
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- waterproof sound
- layer
- sound
- permeable membrane
- proof
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- 239000012528 membrane Substances 0.000 title claims abstract description 77
- 239000002390 adhesive tape Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000000853 adhesive Substances 0.000 claims description 21
- 230000001070 adhesive effect Effects 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims 1
- 229920002554 vinyl polymer Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 12
- 229920000297 Rayon Polymers 0.000 description 7
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000678 plasma activation Methods 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The invention discloses a waterproof sound-transmitting membrane structure with high protection and high sound-transmitting performance, which comprises a first layer of dustproof and waterproof sound-transmitting membrane, a connecting adhesive tape, a second layer of dustproof and waterproof sound-transmitting membrane and a bonding adhesive tape; the first layer of dustproof and waterproof sound-transmitting film and the second layer of dustproof and waterproof sound-transmitting film are connected together through a connecting adhesive tape, and the second layer of dustproof and waterproof sound-transmitting film is bonded on an acoustic finished product through a bonding adhesive tape. The invention covers the acoustic sensor at the stage of parts, can be assembled into a product in an automatic mode, plays a role in protecting the acoustic sensor in the process of manufacturing, can simply remove the first layer of dustproof and waterproof sound-transmitting film, and leaves the second layer of dustproof and waterproof sound-transmitting film to be directly assembled into a finished product. The first layer of dustproof and waterproof sound-transmitting film is not required to be uncovered and then manually assembled once again, so that the cost is greatly reduced.
Description
Technical Field
The invention relates to the field of waterproof sound transmission of acoustic devices, in particular to a waterproof sound transmission membrane structure with high protection and high sound transmission performance.
Background
In order to prevent microphone devices on the upper side from being polluted when a circuit board is coated with a waterproof coating, a layer of dustproof and waterproof sound-transmitting film is attached to the position of a microphone hole, so that normal sound transmission of the microphone can be guaranteed, and the microphone can be prevented from being damaged due to the influence of various complex processes. However, in the process, the strength of the existing dustproof and waterproof sound-transmitting membrane is not enough, and after the process is complex, the acoustic performance can be greatly changed, so that the test requirements of a wire body can be basically met, and the finished product cannot be shipped. The existing method is to tear off the dustproof and waterproof sound-transmitting film in the final assembly process and then replace the dustproof and waterproof sound-transmitting film with a finished film with better acoustic performance, and needs secondary mounting.
The finished membrane with better acoustic performance is replaced in the finished product assembling process, the semi-finished product is very complex in shape due to the fact that the product is assembled into the semi-finished product, automation is realized under the complex structure, the precision requirement is met, the cost is high, and the existing scheme is to replace the finished membrane with better acoustic performance manually.
In order to solve the problem that the later process needs to be manually replaced by a finished film with better acoustic performance, a new sound-transmitting film structure needs to be developed, the sound-transmitting film structure can be attached in the former process, and in the finished product assembling process, the protected dustproof and waterproof sound-transmitting film only needs to be removed.
Disclosure of Invention
The invention aims to: the utility model provides a waterproof sound-transmitting membrane structure that possesses high protectiveness and high sound-transmitting performance, adopts two-layer dustproof waterproof sound-transmitting membrane to cover acoustic sensor, both can guarantee the quality of sound, can protect acoustic sensor to avoid the influence that various uncontrollable factors of numerous and complicated manufacturing process flow caused again to, after taking off the upper story, the acoustic performance of the waterproof sound-transmitting membrane of one deck below is more superior, can direct finished product shipment.
The technical scheme of the invention is as follows:
a waterproof sound-transmitting membrane structure with high protection and high sound-transmitting performance comprises a first layer of dustproof and waterproof sound-transmitting membrane, a connecting adhesive tape, a second layer of dustproof and waterproof sound-transmitting membrane and a bonding adhesive tape; the first layer of dustproof and waterproof sound-transmitting film and the second layer of dustproof and waterproof sound-transmitting film are connected together through a connecting adhesive tape, and the second layer of dustproof and waterproof sound-transmitting film is bonded on an acoustic finished product through a bonding adhesive tape.
Preferably, the connecting adhesive tape and the adhesive tape are in the shape of adhesive rings, so that a non-adhesive area in the middle of the first layer of dustproof and waterproof sound-transmitting film forms a first layer of dustproof and waterproof sound-transmitting film acoustic channel, and a non-adhesive area in the middle of the second layer of dustproof and waterproof sound-transmitting film forms a second layer of dustproof and waterproof sound-transmitting film acoustic channel; the area of the acoustic channel of the first layer of dustproof and waterproof sound-transmitting membrane is larger than or equal to that of the acoustic channel of the second layer of dustproof and waterproof sound-transmitting membrane.
Preferably, the first layer of dustproof and waterproof sound-transmitting film and the second layer of dustproof and waterproof sound-transmitting film are expanded polytetrafluoroethylene films.
Preferably, the connecting adhesive tape is one of double-sided adhesive, UV (ultraviolet) viscose loss glue, heat viscose loss glue and moisture viscose loss glue.
Preferably, the adhesive tape is one of a double-sided adhesive tape, a hot-pressing adhesive tape, a plasma activated adhesive tape and an AB adhesive tape.
Preferably, the thickness of the connecting adhesive tape is 30-100 micrometers, so that a gap is formed between the first layer of dustproof and waterproof sound-transmitting film and the second layer of dustproof and waterproof sound-transmitting film in an unbonded area, and sound pressure deformation caused by mutual interference of the two layers of dustproof and waterproof sound-transmitting films in the vibration sound transmission process is avoided.
Preferably, the connecting adhesive tape is removed in the assembly process of the waterproof sound-transmitting membrane structure and the acoustic finished product, and the removing method is one of physical removing, removing after UV adhesive loss, removing after thermal adhesive loss and removing after moisture adhesive loss.
Preferably, the thickness of the expanded polytetrafluoroethylene film of the first layer of dustproof and waterproof sound-transmitting film and the second layer of dustproof and waterproof sound-transmitting film is 1-100 mu m.
Preferably, the air permeability of the first layer of dustproof and waterproof sound-transmitting film and the second layer of dustproof and waterproof sound-transmitting film is more than or equal to 5.75L.L/HR/cm under the air pressure of 70mBAR2。
The invention has the advantages that:
the invention has the advantages that the acoustic sensor is covered at the stage of parts, the invention can be assembled in a product in an automatic mode, the effect of protecting the acoustic sensor is achieved in the process of manufacturing, the first layer of dustproof and waterproof sound-transmitting film can be simply removed, and the second layer of dustproof and waterproof sound-transmitting film is directly assembled in a finished product. The first layer of dustproof and waterproof sound-transmitting film is not required to be uncovered and then manually assembled once again, so that the cost is greatly reduced.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a sectional view of a waterproof sound-transmitting membrane structure of example 1 of the present invention;
FIG. 2 is a top view of a waterproof sound-transmitting membrane structure according to example 1 of the present invention;
FIG. 3 is a sectional view of a waterproof sound-transmitting membrane structure of example 2 of the invention;
FIG. 4 is a sectional view of a waterproof sound-transmitting membrane structure of example 3 of the invention;
FIG. 5 is a sectional view of a waterproof sound-transmitting membrane structure of example 4 of the present invention;
FIG. 6 is a graph showing the sensitivity of example 1 after removing the first dustproof and waterproof sound-transmitting membrane;
FIG. 7 is a graph showing a comparison of insertion loss between example 1 and the case where the first dustproof and waterproof sound-transmitting membrane is removed;
FIG. 8 is a graph comparing the sensitivity of examples 1 to 4;
FIG. 9 is a graph comparing insertion losses for examples 1-4.
Detailed Description
As shown in fig. 1 and 2, the waterproof sound-transmitting membrane structure with high protection and high sound-transmitting performance of the present invention includes a first layer of dustproof and waterproof sound-transmitting membrane 1, a connecting tape 2, a second layer of dustproof and waterproof sound-transmitting membrane 3, and a bonding tape 4; the first layer of dustproof and waterproof sound-transmitting film 1 and the second layer of dustproof and waterproof sound-transmitting film 3 are connected together through the connecting adhesive tape 2, and the second layer of dustproof and waterproof sound-transmitting film 3 is bonded on an acoustic finished product through the bonding adhesive tape 4.
The connection adhesive tape 2 and the adhesive tape 4 are in the shape of an adhesive ring, so that a non-adhesive area in the middle of the first layer of dustproof and waterproof sound-transmitting film 1 forms a first layer of dustproof and waterproof sound-transmitting film acoustic channel 5, and a non-adhesive area in the middle of the second layer of dustproof and waterproof sound-transmitting film 3 forms a second layer of dustproof and waterproof sound-transmitting film acoustic channel 6.
The shapes of the exterior structure 12 and the non-joint region structure 11 of the present invention are not limited. In the example shown in fig. 1 and 2, the outer configuration 12 is circular and the non-bonded region configuration 11 is circular when viewed from the direction perpendicular to the main surface of the dust-and-water proof sound-transmitting membrane 1. Wherein the shapes of the outer configuration 12 and the non-joint area configuration 11 are independent of each other, and can be a circle, an ellipse, a rectangle, a square or a polygon of other shapes.
The invention is used for high-sound-transmission products, before the first layer of dustproof and waterproof sound-transmitting film is not removed, the first layer of dustproof and waterproof sound-transmitting film and the second layer of dustproof and waterproof sound-transmitting film transmit sound simultaneously, wherein a non-joint area of the first layer of dustproof and waterproof sound-transmitting film forms a first layer of dustproof and waterproof sound-transmitting film acoustic channel 5, a non-joint area of the second layer of dustproof and waterproof sound-transmitting film forms a second layer of dustproof and waterproof sound-transmitting film acoustic channel 6, and the area of the first layer of dustproof and waterproof sound-transmitting film acoustic channel 5 is more than or equal to the area of the second layer of dustproof and waterproof sound-transmitting film acoustic channel 6.
The first layer of dustproof and waterproof sound-transmitting film 1 and the second layer of dustproof and waterproof sound-transmitting film 3 are connected by the connecting adhesive tape 2, so that a certain gap is formed between the first layer of dustproof and waterproof sound-transmitting film 1 and the second layer of dustproof and waterproof sound-transmitting film 3, the gap is the thickness 7 of the connecting adhesive tape, the thickness is larger than 30 micrometers, can be 30-100 micrometers, and can also be 40-70 micrometers or 50-80 micrometers. The thickness 7 of the adhesive tape is used for preventing the dustproof and waterproof sound-transmitting film from vibrating in the process of vibration sound transmission to cause mutual interference of the films to form sound pressure deformation.
The first layer of dustproof and waterproof sound-transmitting film 1 and the second layer of dustproof and waterproof sound-transmitting film 3 are both made of expanded Polytetrafluoroethylene (PTFE) and have the thickness of 1-100 mu m. Under the condition that two-layer dustproof and waterproof sound-transmitting membrane is in this scope, can possess simultaneously can also possess good sound transmission nature under the waterproof performance of dustproof ability.
Meanwhile, the first layer of dustproof and waterproof sound-transmitting film 1 and the second layer of dustproof and waterproof sound-transmitting film 3 haveHas good air permeability, and the air permeability is more than or equal to 5.75L/HR/cm under the air pressure of 70mBAR2But is not limited to this amount of ventilation. The air permeability of the two layers of dustproof and waterproof sound-transmitting films reaches 5.75L/HR/cm2In the case of (2), the sound transmission is particularly good.
Wherein the material of the connecting tape 2 connecting the first layer of dustproof and waterproof sound-transmitting membrane 1 and the second layer of dustproof and waterproof sound-transmitting membrane 3 can be double faced adhesive tape, UV viscose loss, heat viscose loss, moisture viscose loss and AB viscose loss, but is not limited to these materials. The first layer of dustproof and waterproof sound-transmitting film 1 can be removed by physical tearing, UV debonding, thermal debonding, moisture debonding, and AB debonding, but is not limited to these methods. The first layer of dustproof and waterproof sound-transmitting film 1 can not remain adhesive after being removed, and the surface damage to the second layer of dustproof and waterproof sound-transmitting film 3 is minimum.
The material of the adhesive tape 4 connecting the second layer of dustproof and waterproof sound-transmitting membrane 3 and the product can be double-sided adhesive, hot-pressed adhesive, plasma activated adhesive, and AB adhesive, but is not limited to these materials. The fixing and reinforcing method can be hot pressing, plasma activation and AB gluing, but is not limited to these methods.
The results of acoustic comparison of example 1 of the present invention and the removal of the first dustproof and waterproof sound-permeable film, and detection of sensitivity and insertion loss were carried out according to the "direct comparison method" mentioned in the patent document "structure of a matrix-type dustproof and waterproof sound-permeable film for micro-electromechanical sensor" (publication No. CN 111601222A), and are shown in fig. 6 and 7, respectively.
Example 2
As shown in fig. 3, the first layer of dustproof and waterproof sound-transmitting membrane 1 and the second layer of dustproof and waterproof sound-transmitting membrane 3 of the present embodiment have the same outer dimensions, and the dimension of the first layer of dustproof and waterproof sound-transmitting membrane acoustic channel 5' is larger than the dimension of the second layer of dustproof and waterproof sound-transmitting membrane acoustic channel 6.
Example 3
As shown in fig. 4, the first layer of dustproof and waterproof sound-transmitting membrane 1 ″ of the present embodiment has a larger outer dimension than the second layer of dustproof and waterproof sound-transmitting membrane 3; the size of the acoustic channel 5'' of the first layer of dustproof and waterproof sound-transmitting membrane is larger than the external size of the second layer of dustproof and waterproof sound-transmitting membrane 3, and the first layer of dustproof and waterproof sound-transmitting membrane 1'' covers the whole second layer of dustproof and waterproof sound-transmitting membrane 3.
Example 4
As shown in fig. 5, compared with the embodiment of example 3, a layer of connecting tape 13 is added on the second layer of dustproof and waterproof sound-transmitting membrane 3.
The protocols of examples 1, 2, 3 and 4 were acoustically compared according to the "direct comparison method" and tested for sensitivity and insertion loss, the results of which are shown in FIGS. 8 and 9, respectively.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011168066.3A CN112423192A (en) | 2020-10-28 | 2020-10-28 | Waterproof sound-transmitting membrane structure with high protection performance and high sound-transmitting performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011168066.3A CN112423192A (en) | 2020-10-28 | 2020-10-28 | Waterproof sound-transmitting membrane structure with high protection performance and high sound-transmitting performance |
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| Publication Number | Publication Date |
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| CN112423192A true CN112423192A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011168066.3A Pending CN112423192A (en) | 2020-10-28 | 2020-10-28 | Waterproof sound-transmitting membrane structure with high protection performance and high sound-transmitting performance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115022753A (en) * | 2021-03-04 | 2022-09-06 | Jvc建伍株式会社 | Speaker grill assembly and portable wireless communication device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103202036A (en) * | 2011-06-01 | 2013-07-10 | 日东电工株式会社 | Water-resistant sound transmitting member, production method therefor, and water-resistant sound transmitting member carrier |
| WO2019132044A1 (en) * | 2017-12-28 | 2019-07-04 | 日東電工株式会社 | Waterproofing member and electronic equipment |
| CN209914055U (en) * | 2019-06-30 | 2020-01-07 | 昆山艾尤诺新材料科技有限公司 | Net-type dustproof puncture-proof waterproof breathable sound-transmitting MIC sound-transmitting membrane |
| CN213586243U (en) * | 2020-10-28 | 2021-06-29 | 苏州孝义家光电科技有限公司 | Waterproof sound-transmitting membrane structure |
-
2020
- 2020-10-28 CN CN202011168066.3A patent/CN112423192A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103202036A (en) * | 2011-06-01 | 2013-07-10 | 日东电工株式会社 | Water-resistant sound transmitting member, production method therefor, and water-resistant sound transmitting member carrier |
| WO2019132044A1 (en) * | 2017-12-28 | 2019-07-04 | 日東電工株式会社 | Waterproofing member and electronic equipment |
| CN209914055U (en) * | 2019-06-30 | 2020-01-07 | 昆山艾尤诺新材料科技有限公司 | Net-type dustproof puncture-proof waterproof breathable sound-transmitting MIC sound-transmitting membrane |
| CN213586243U (en) * | 2020-10-28 | 2021-06-29 | 苏州孝义家光电科技有限公司 | Waterproof sound-transmitting membrane structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115022753A (en) * | 2021-03-04 | 2022-09-06 | Jvc建伍株式会社 | Speaker grill assembly and portable wireless communication device |
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