CN110602602A - Electronic equipment and audio module thereof - Google Patents
Electronic equipment and audio module thereof Download PDFInfo
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- CN110602602A CN110602602A CN201910882625.8A CN201910882625A CN110602602A CN 110602602 A CN110602602 A CN 110602602A CN 201910882625 A CN201910882625 A CN 201910882625A CN 110602602 A CN110602602 A CN 110602602A
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- reinforcing sheet
- groove
- circuit board
- flexible circuit
- membrane
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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
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Telephone Set Structure (AREA)
Abstract
The invention discloses an audio module, which comprises a microphone monomer with a sound pickup hole, wherein the microphone monomer is electrically connected to a first side of a flexible circuit board, two sides of a reinforcing sheet body are respectively connected with a second side of the flexible circuit board and a shell assembly in a sealing manner, both the flexible circuit board and the reinforcing sheet body are provided with through holes communicated with the sound pickup hole, the shell assembly is provided with sound holes communicated with the through holes, one side, close to the shell assembly, of the reinforcing sheet body is provided with a groove, the groove is respectively communicated with the sound holes and the through holes, a waterproof membrane is attached to the groove, the through holes in the reinforcing sheet body are plugged by the waterproof membrane, one side, close to the shell assembly, of the waterproof membrane is arranged between the shell assembly, and gaps. The invention discloses electronic equipment comprising the audio module. Above-mentioned audio frequency module can avoid the water proof membrane deformation to a great extent to ensure acoustic performance.
Description
Technical Field
The present invention relates to the field of electronic devices, and particularly to an electronic device and an audio module thereof.
Background
With the continuous update of electronic equipment, more and more electronic equipment is configured with audio frequency module to realize the diversification of function.
To the audio frequency module, including parts such as mike monomer, flexible circuit board, reinforcement lamellar body and water proof membrane usually, mike monomer and flexible circuit board electricity are connected to realize mike free corresponding function, avoid external liquid to get into mike monomer through the water proof membrane in addition, thereby realize the waterproof function of audio frequency module.
Particularly, flexible circuit board and reinforcement lamellar body link to each other, utilize the reinforcement lamellar body to strengthen flexible circuit board's intensity, the one side and the reinforcement lamellar body of water proof membrane link to each other, the another side and the casing subassembly laminating of water proof membrane, after the water proof membrane assembly finishes, because the two sides of water proof membrane laminate with reinforcement lamellar body and casing subassembly respectively, make the water proof membrane receive the extrusion force that comes from reinforcement lamellar body and casing subassembly both all the time, along with going on of follow-up assembly, the position that the water proof membrane is compared in reinforcement lamellar body and casing subassembly both is very easily taken place the skew, the water proof membrane can produce the internal stress, even the fold warp, and then make the vibration performance of water proof membrane influenced, lead to acoustics high frequency performance.
In summary, how to provide an audio module that prevents the vibration performance of the waterproof membrane from being affected is a technical problem that needs to be considered by those skilled in the art.
Disclosure of Invention
The invention aims to provide electronic equipment and an audio module thereof, which can avoid the influence on the vibration performance of a waterproof membrane to a greater extent so as to ensure the acoustic performance.
In order to achieve the above object, the present invention provides an audio module, comprising a microphone unit having a sound pickup hole, the microphone unit being electrically connected to a first side of a flexible circuit board, both sides of a reinforcing sheet being hermetically connected to a second side of the flexible circuit board and a housing assembly, both the flexible circuit board and the reinforcing sheet being provided with a through hole communicating with the sound pickup hole, the housing assembly being provided with a sound hole communicating with the through hole,
the recess is seted up to one side that the reinforcement lamellar body is close to the casing subassembly, the recess respectively with phonate hole and through-hole intercommunication, the recess laminating has the water proof membrane, the water proof membrane shutoff is located the through-hole of reinforcement lamellar body, the water proof membrane is close to between one side and the casing subassembly of casing subassembly to and all have the clearance between the outer fringe of water proof membrane and the cell wall of recess.
Compared with the background art, the audio module provided by the invention has the advantages that the reinforcing sheet body is provided with the groove, the groove and the shell assembly are matched to form the accommodating cavity, and the accommodating cavity is internally provided with the waterproof film attached to the groove; wherein, there is the clearance between one side and the casing subassembly that the waterproofing membrane is close to the casing subassembly, has the clearance between the outer fringe of waterproofing membrane and the cell wall of recess. According to the arrangement, the waterproof membrane is fixed relative to the accommodating cavity, namely the waterproof membrane is positioned by the accommodating cavity, in view of the position relation between the groove and the waterproof membrane, the edge of the waterproof membrane cannot be stressed from the groove wall, the shell assembly cannot apply acting force to the waterproof membrane, deformation caused by extrusion is avoided, the original form of the waterproof membrane is ensured, in the using process, the part, located at the through hole of the reinforcing sheet body, of the waterproof membrane can vibrate freely, the acoustic high-frequency performance is ensured, namely the waterproof membrane has a waterproof function, and meanwhile, poor acoustic performance caused by deformation can be avoided; meanwhile, the components are simple to assemble, and complex assembling processes are not needed.
Optionally, the flexible circuit board and the reinforcing sheet are bonded by a conductive adhesive.
Optionally, the microphone unit, the flexible circuit board, the reinforcing sheet and the housing assembly are sequentially arranged from top to bottom, and the groove is formed in the lower surface of the reinforcing sheet.
To the situation that so sets up, set up the recess at the lower surface of reinforcement lamellar body, behind both fixed connection of reinforcement lamellar body and casing subassembly, can think recess and casing subassembly formation holding chamber, be equipped with the water proof membrane in the holding chamber, water proof membrane and recess laminating have the clearance between one side that the water proof membrane is close to casing subassembly and the casing subassembly, have the clearance between the outer fringe of water proof membrane and the cell wall of recess. With the arrangement, the waterproof membrane is positioned by the accommodating cavity; the upper surface of the waterproof membrane is attached to the groove, the lower surface of the waterproof membrane cannot be attached to the upper surface of the shell assembly, the lower surface of the waterproof membrane has no contact stress with the upper surface of the shell assembly, and the edge of the waterproof membrane cannot be stressed by the wall of the groove; therefore, the waterproof membrane cannot deform due to extrusion of the shell assembly, the original form of the waterproof membrane is ensured, the part, located at the through hole of the reinforcing sheet body, of the waterproof membrane can vibrate freely in the using process, the acoustic high-frequency performance is ensured, and the waterproof membrane has a waterproof function and can avoid poor acoustic performance caused by deformation; meanwhile, the components are simple to assemble, and complex assembling processes are not needed.
Optionally, the casing assembly is provided with a support, the support forms a cavity for accommodating the microphone unit, the flexible circuit board and the reinforcing sheet, the microphone unit, the flexible circuit board and the reinforcing sheet are fixed and sealed in the cavity, the microphone unit and the reinforcing sheet are respectively located on two sides of the cavity, and the groove is located on the surface of the reinforcing sheet far away from the microphone unit.
The situation that is equipped with the support to the casing subassembly, the support forms the cavity, mike monomer and reinforcement lamellar body both are located the both sides of cavity respectively, flexible circuit board and mike monomer electricity are connected, the reinforcing lamellar body is being located and is keeping away from the free surface of mike and offer the recess, after the reinforcing lamellar body is fixed and sealed in the inside of cavity, the inside wall of recess and cavity forms the holding chamber, be equipped with the water proof membrane in the holding chamber, water proof membrane and recess laminating, the water proof membrane has the clearance near between one side of casing subassembly and the casing subassembly, the clearance has between the outer fringe of water proof membrane and the cell wall of recess. According to the arrangement, the waterproof membrane is positioned by the accommodating cavity, meanwhile, the surface of the waterproof membrane close to the microphone monomer is attached to the groove, the surface of the waterproof membrane far away from the microphone monomer is not attached to the inner side wall of the cavity, no contact stress exists between the surface of the waterproof membrane far away from the microphone monomer and the inner side wall of the cavity, and the edge of the waterproof membrane is not stressed by the groove wall of the groove; therefore, the waterproof membrane cannot deform due to extrusion of the shell assembly, the original form of the waterproof membrane is ensured, the waterproof membrane can vibrate freely in the using process, the acoustic high-frequency performance is ensured, and the waterproof membrane has a waterproof function and can avoid poor acoustic performance caused by deformation; meanwhile, the components are simple to assemble, and complex assembling processes are not needed.
Optionally, both the reinforcing sheet and the shell assembly are sealed by foam.
Optionally, the microphone unit, the flexible circuit board and the reinforcing sheet are fixed and sealed in the cavity by a sealant.
Optionally, the waterproof membrane includes the membrane body and sets up the stromatolite at the membrane body edge, and the stromatolite is compared with the membrane body thick, and the stromatolite is laminated in the recess, has the space between the tank bottom of membrane body and recess, and the stromatolite setting is located the through-hole of reinforcement lamellar body all around.
Optionally, one side of the casing assembly attaching reinforcing sheet body is parallel to the groove bottom of the groove, and the depth of the groove is larger than the thickness of the waterproof film.
Optionally, the groove bottom of the groove is perpendicular to the groove wall of the groove.
The invention also discloses electronic equipment comprising the audio module.
The electronic device with the audio module according to the present invention has the above advantages, and will not be described herein again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is an exploded view of an audio module according to an embodiment of the present invention;
fig. 2 is a front view of an audio module according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of an audio module according to an embodiment of the invention;
fig. 4 is a cross-sectional view of an audio module according to a second embodiment of the invention.
Wherein:
the microphone comprises a microphone body 1, a pickup hole 11, a flexible circuit board 2, a through hole 21, a reinforcing sheet body 3, a groove 31, a shell assembly 4, a cavity 40, a sound hole 41, a hot melting column 42, a waterproof membrane 5, foam rubber 61 and sealant 62.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The first embodiment is as follows:
an audio module according to an embodiment of the present invention, referring to fig. 1 to 3 of the specification, includes a microphone unit 1, a reinforcing sheet 3, a housing assembly 4, and a waterproof membrane 5, where the reinforcing sheet 3 is located below the microphone unit 1, and the housing assembly 4 is located below the reinforcing sheet 3.
Be equipped with Flexible circuit board 2 between mike monomer 1 and the reinforcement lamellar body 3, mike monomer 1 is connected with Flexible circuit board 2 electricity usually to realize mike monomer 1's vocal function, Flexible circuit board 2 can specifically be FPC (Flexible printed circuit) or other types of Flexible circuit board, and accessible conducting resin bonds between reinforcement lamellar body 3 and the Flexible circuit board 2 between the two.
The mike single body 1 is electrically connected to the upper surface of the flexible circuit board 2, the lower surface of the flexible circuit board 2 is connected to the upper surface of the reinforcing sheet body 3, and the lower surface of the reinforcing sheet body 3 is connected to the upper surface of the shell assembly 4.
Wherein, two fixed connection of reinforcement lamellar body 3 and casing subassembly 4, and keep sealed between reinforcement lamellar body 3 and the casing subassembly 4, do not have the gap between also that reinforcement lamellar body 3 and the casing subassembly 4 are two, and gas or liquid can't permeate to between reinforcement lamellar body 3 and the casing subassembly 4, realize the external seal of audio frequency module. The reinforcing sheet 3 may be made of steel, for example, and the housing assembly 4 may be injection molded.
Recess 31 is seted up to the lower surface of reinforcement lamellar body 3, form the holding chamber after recess 31 and the cooperation of casing subassembly 4, recess 31 forms the upper surface and the lateral wall of holding intracavity side, the lower bottom surface in holding chamber is formed to some upper surfaces of casing subassembly 4, the lower surface that recess 31 was not seted up to other partial upper surfaces of casing subassembly 4 and reinforcement lamellar body 3 laminates each other, can know through the aforesaid, based on keeping sealed characteristic between reinforcement lamellar body 3 and the casing subassembly 4 two, gaseous or the unable inside to audio frequency module that permeates of liquid.
The waterproof membrane 5 is arranged in the accommodating cavity, the upper surface of the waterproof membrane 5 is attached to the inner upper surface of the accommodating cavity, and a gap is formed between the lower surface of the waterproof membrane 5 and the shell assembly 4. Meanwhile, a gap is formed between the outer edge of the waterproof membrane 5 and the groove wall of the groove 31, that is, after the waterproof membrane 5 is installed in the groove 31, the lower surface of the waterproof membrane 5 is not attached to the upper surface of the housing assembly 4, the outer edge of the waterproof membrane 5 is not attached to the groove wall of the groove 31, the lower surface of the waterproof membrane 5 is not stressed by the upper surface of the housing assembly 4, and the edge of the waterproof membrane 5 is not stressed by the side wall of the groove 31. Obviously, the inner diameter of the groove 31 should be set larger than the outer diameter of the waterproofing membrane 5 so as to avoid contact between the outer edge of the waterproofing membrane 5 and the wall of the groove 31. Referring to the attached drawings 2 and 3 of the specification, the bottom of the microphone unit 1 is provided with a sound pickup hole 11, the sound pickup hole 11 penetrates through the bottom of the microphone unit 1, both the flexible circuit board 2 and the reinforcing sheet body 3 are provided with through holes 21, the through holes 21 and the sound pickup hole 11 can be coaxially arranged, the shell assembly 4 is provided with a sound hole 41, and the sound hole 41 is communicated with the through holes 21.
The holding chamber of reinforcement lamellar body 3 and the through-hole intercommunication that is located the reinforcement lamellar body, and holding chamber and phonate hole 41 intercommunication, because the holding chamber is fixed with water proof membrane 5, the 5 shutoff of water proof membrane is located the through-hole 21 of reinforcement lamellar body 3, and obviously, the through-hole 21 size of reinforcement lamellar body 3 should be less than the size in holding chamber, and the size of water proof membrane 5 should be greater than the through-hole 21 size of reinforcement lamellar body 3.
It is considered that the waterproof membrane 5 separates the sound hole 41 and the through hole 21, the waterproof membrane 5 can prevent liquid from entering the interior of the mike cell 1 through the sound hole 41, the interior waterproof function for the mike cell 1 is realized, and the waterproof membrane 5 does not receive the extrusion force from the reinforcing sheet body 3 and the housing assembly 4, so that the waterproof membrane 5 vibrates freely on the premise of having the waterproof function, and the acoustic performance is further improved.
In the use, the external audio frequency that is located the outside of audio frequency module firstly gets into housing assembly 4's sound hole 41, then through water proof membrane 5, water proof membrane 5 vibrates, again through-hole 21 and pickup hole 11 in proper order, finally gets into mike monomer 1, accomplishes the pickup process. Referring to the specification, fig. 2 and 3, the waterproof film 5 is horizontally arranged, the waterproof film 5 generally comprises a film body and a laminated layer, the film body is often in a circular sheet shape, the laminated layer is arranged on the edge of the film body, the laminated layer is thicker than the film body, the laminated layer plays a role of supporting the film body, and the upper surface of the laminated layer can be provided with a sticky material such as a double-sided adhesive tape.
In the using process, the upper surface of the lamination layer can be attached to the groove bottom (the upper surface of the inner side of the accommodating cavity) of the groove 31, and the height of the accommodating cavity is greater than the thickness of the lamination layer, so that a certain gap is formed between the lower surface of the lamination layer and the lower bottom surface of the accommodating cavity; a certain gap (which can be set to about 0.1 mm) is formed between the side edge of the lamination and the two sides of the accommodating cavity, so that the lamination (the waterproof membrane 5) is prevented from touching the two sides of the accommodating cavity; the stromatolite sets up around the through-hole 21 that is located reinforcement lamellar body 3, because stromatolite and film body link to each other, the projection that is located the through-hole 21 of reinforcement lamellar body 3 along vertical direction is thrown on the film body, waterproof membrane 5 only relies on the upper surface of stromatolite and the tank bottom (the upper surface of holding intracavity side) of recess 31 to laminate mutually, the upper surface of film body and the tank bottom of recess 31 have the space, the film body does not contact with the tank bottom of recess 31, can guarantee like this that the film body can not receive the extrusion of casing subassembly 4 and recess 31 (no matter tank bottom or tank wall), can strengthen waterproof membrane 5's service strength to a certain extent through reinforcement lamellar body 3, waterproof membrane 5 has abundant space and realizes the vibration, effectively avoid because of the acoustic performance that deformation leads to is bad.
It can be seen that the membrane body has a vibration space during use, and noise or other poor performance caused by touching the groove 31 during vibration is avoided. Meanwhile, when water enters the sound hole 41, the water presses the waterproof membrane 5 upwards, so that the lamination layer is attached to the bottom of the groove 31 more tightly.
In the installation, because mike monomer 1 and flexible circuit board 2 set up as an organic whole usually, mike monomer 1 is located the first side of flexible circuit board 2 (also be the upper surface of flexible circuit board 2), at first can laminate reinforcement lamellar body 3 in flexible circuit board 2 not set up one side of mike monomer 1 (the second side, also be the lower surface of flexible circuit board 2), then install inside recess 31 of reinforcement lamellar body 3 with water proof membrane 5, assemble reinforcement lamellar body 3 and housing assembly 4 in place and fixed again, do waterproof sealing at last and handle, the equipment of audio frequency module up to this moment is accomplished.
It can be seen that the upper surface of the housing assembly 4 may be arranged horizontally, the groove 31 may also be arranged horizontally, and the depth of the groove 31 may be arranged to be greater than the thickness of the waterproofing membrane 5, so that a gap is ensured between the waterproofing membrane 5 and the housing assembly 4, as shown in fig. 2 and 3 of the specification. Of course, in order to prevent the waterproof membrane 5 from contacting the upper surface of the housing assembly 4, the upper surface of the housing assembly 4 may be provided with a recessed portion (the upper surface of the housing assembly 4 is not horizontally disposed), the recessed portion is located below the groove 31, and the thickness of the waterproof membrane 5 may be larger than the depth of the groove 31 as long as the lower surface of the waterproof membrane 5 is not attached to the upper surface of the recessed portion.
Referring to the description of the drawings, fig. 1 to 3, the sealing between the reinforcing sheet 3 and the housing member 4 can be achieved by a foam 61. Specifically, the foam rubber 61 is made by coating a solvent-based (or hot-melt type) pressure-sensitive adhesive on one or both surfaces of EVA (ethylene-vinyl acetate copolymer) or PE (polyethylene) foam as a base material and then laminating release paper, and has sealing and shock-absorbing effects, and excellent compression set resistance, flame retardancy, wettability, and the like.
Therefore, the reinforcing sheet body 3 and the shell assembly 4 can be sealed by the foam adhesive 61 with double-sided viscosity, and certainly, the sealing mode for the reinforcing sheet body 3 and the shell assembly 4 can be realized by other modes, which is not described herein again.
Bubble celloidin 61 can be located the outside in holding chamber, also be the outside of recess 31, like description figure 1, because waterproof membrane 5 is circular usually, consequently can be circular with recess 31 setting, in order to avoid bubble celloidin 61 to produce the squeezing action to the waterproof membrane 5 that is located in recess 31, consequently bubble celloidin 61 can be equipped with the circular shape hole of dodging, bubble celloidin 61 can be located the outside in holding chamber, further ensures that waterproof membrane 5 avoids receiving the extrusion force, ensures waterproof membrane 5's normal use.
Referring to the description and the accompanying drawings 1 to 3, the reinforcing sheet 3 and the housing assembly 4 are tightly attached, that is, both the upper surface of the housing assembly 4 and the lower surface of the reinforcing sheet 3 can be set to be flat surfaces, when the reinforcing sheet 3 and the housing assembly 4 are assembled, the upper surface of the housing assembly 4 and the lower surface of the reinforcing sheet 3, which is not provided with the groove 31, are tightly attached together, and waterproof performance can be ensured to the maximum extent after waterproof sealing; of course, the upper surface of the housing member 4 and the lower surface of the reinforcing sheet 3 are not limited to be flat surfaces, but may be other structures such as a saw-toothed structure, as long as the reinforcing sheet 3 and the housing member 4 are tightly attached to each other.
For the shape of the accommodating cavity, as shown in fig. 2 and fig. 3 in the specification, the upper surface and the lower surface of the inner side of the accommodating cavity can be arranged in parallel, that is, the upper surface of the shell component 4 and the groove bottom of the groove 31 are parallel to each other, and meanwhile, the groove wall of the groove 31 can be perpendicular to the groove bottom of the groove 31, that is, the accommodating cavity is a rectangular cavity; as described above, since the membrane body of the waterproof membrane 5 tends to be of equal thickness and the laminate is also of equal thickness (the thickness of the laminate is generally greater than that of the membrane body), the accommodating cavity can be set to be of equal height (the upper surface and the lower surface inside the accommodating cavity are parallel), so as to ensure that the waterproof membrane 5 in the accommodating cavity vibrates reliably, which contributes to further improving the acoustic performance.
As shown in the attached drawing 1, the upper surface of the housing assembly 4 can be provided with the hot melting column 42, the hot melting column 42 extends upwards, and the foam glue 61, the reinforcing sheet body 3 and the flexible circuit board 2 can be sequentially penetrated from the bottom to the fixed connection of the housing assembly 4, the foam glue 61, the reinforcing sheet body 3 and the flexible circuit board 2 can be realized.
The reinforcing sheet body 3 and the flexible circuit board 2 can be tightly attached, and the upper surface of the reinforcing sheet body 3 and the lower surface of the flexible circuit board 2 can be horizontally arranged, so that the reinforcing sheet body 3 and the flexible circuit board 2 can be tightly attached, and the structure reliability of the audio module is ensured; of course, the upper surface of the reinforcing sheet 3 and the lower surface of the flexible circuit board 2 may be formed in other shapes as long as it is ensured that both the reinforcing sheet 3 and the flexible circuit board 2 are closely attached.
As shown in fig. 3 of the specification, the housing component 4 is provided with an acoustic cavity, the acoustic cavity may be arranged in an L shape, that is, the acoustic cavity includes a horizontal sound channel and a vertical sound channel, the sound hole 41 is located at the end of the vertical sound channel, the horizontal sound channel and the vertical sound channel are communicated with each other, and the vertical sound channel and the through hole 21 may be arranged coaxially, so that the sound pickup hole 11, the through hole 21 and the vertical sound channel are vertical and perpendicular to the horizontal sound channel, thereby forming a so-called L-shaped cavity body in the prior art to transmit the external audio to the microphone unit 1.
Example two:
referring to the attached drawing 4 of the specification, another audio module provided in the embodiment of the present invention includes a microphone unit 1, a reinforcing sheet 3, a housing assembly 4, and a waterproof membrane 5, where the housing assembly 4 is provided with a bracket, the bracket forms a cavity 40 with an upward opening, and the microphone unit 1 and the reinforcing sheet 3 are disposed inside the cavity 40. The support includes left side support and right side support, and the bottom of left side support and right side support links to each other, forms cavity 40, is used for holding mike monomer 1, flexible circuit board 2 and reinforcement lamellar body 3.
Wherein, left side support and right side support all can vertically set up to no matter be left surface and the right flank of left side support, still the left surface and the right flank of right side support all can vertically set up, as show in description figure 4.
Be equipped with Flexible circuit board 2 between mike monomer 1 and the reinforcement lamellar body 3, mike monomer 1 is connected with Flexible circuit board 2 electricity usually to realize mike monomer 1's vocal function, Flexible circuit board 2 can specifically be FPC (Flexible printed circuit) or other types of Flexible circuit board, and accessible conducting resin bonds between reinforcement lamellar body 3 and the Flexible circuit board 2 between the two. Taking the orientation shown in fig. 4 of the specification as an example, the microphone unit 1 is attached to the right bracket, the microphone unit 1 is connected to the right side surface of the flexible circuit board 2 (i.e., the first side of the flexible circuit board 2), the left side surface of the flexible circuit board 2 is connected to the right side surface of the reinforcing sheet body 3 (i.e., the second side of the flexible circuit board 2), and the left side surface of the reinforcing sheet body 3 is attached to the left bracket.
The microphone unit 1 and the reinforcing sheet 3 are fixedly connected, and the microphone unit 1 and the reinforcing sheet 3 are sealed inside the cavity 40. In the installation process, the microphone unit 1 and the reinforcing sheet 3 can be firstly arranged at a certain position inside the cavity 40, and the position of the flexible circuit board 2 relative to the cavity 40 is fixed at the moment because the microphone unit 1 and the flexible circuit board 2 usually form an integrated microphone component; then seal microphone monomer 1 and reinforcement lamellar body 3 two in the inside of cavity 40 through seal part, microphone monomer 1 and reinforcement lamellar body 3 two can not change for the position of cavity 40 this moment, and the external air of cavity 40 and liquid can not contact with microphone monomer 1 and reinforcement lamellar body 3 two, have greatly prolonged the life of microphone monomer 1 and reinforcement lamellar body 3 two.
The microphone unit 1 and the reinforcing sheet 3 are respectively located on two sides of the cavity 40, and taking the orientation shown in the attached drawing 4 of the specification as an example, the microphone unit 1 is located on the right side of the cavity 40, the reinforcing sheet 3 is located on the left side of the cavity 40, and the flexible circuit board 2 is located between the microphone unit 1 and the reinforcing sheet 3; in order to ensure the reliable position of the microphone unit 1 and the reinforcing sheet body 3 relative to the cavity 40, the microphone unit 1 can be attached to the right bracket, and similarly, the reinforcing sheet body 3 can be attached to the left bracket; the reinforcing sheet 3 may be made of steel, for example, and the housing assembly 4 may be injection molded.
The reinforcing sheet body 3 is located and offers recess 31 on the surface of keeping away from mike monomer 1, the vertical setting of recess 31, also, recess 31 is offered to the left surface of reinforcing sheet body 3, recess 31 and left side support form the holding chamber, the height in holding chamber is the degree of depth of recess 31 promptly, can know through the aforesaid, because mike monomer 1 and reinforcing sheet body 3 both seal in the inside of cavity 40, consequently the holding chamber also is in encapsulated situation, the external air of cavity 40 and liquid can not get into the holding chamber, realize the external seal of audio frequency module.
The waterproof membrane 5 is arranged in the accommodating cavity, the left side face of the waterproof membrane 5 is attached to the right side face of the accommodating cavity (the groove bottom of the groove 31), and a gap is formed between the right side face of the waterproof membrane 5 and the left side support of the shell assembly 4. Meanwhile, a gap is formed between the outer edge of the waterproof membrane 5 and the groove wall of the groove 31, that is, after the waterproof membrane 5 is installed in the groove 31, the right side surface of the waterproof membrane 5 is not attached to the left bracket, the outer edge of the waterproof membrane 5 is not attached to the groove wall of the groove 31, the right side surface of the waterproof membrane 5 is not stressed by the shell assembly 4, and the edge of the waterproof membrane 5 is not stressed by the side wall of the groove 31. Obviously, the inner diameter of the groove 31 should be set larger than the outer diameter of the waterproofing membrane 5 so as to avoid contact between the outer edge of the waterproofing membrane 5 and the wall of the groove 31.
Referring to the attached fig. 4 of the specification, the microphone unit 1 is provided with a sound pickup hole 11, both the flexible circuit board 2 and the reinforcing sheet body 3 are provided with a through hole 21, the through hole 21 and the sound pickup hole 11 can be coaxially arranged, the housing assembly 4 is provided with a sound hole 41, and the sound hole 41 is communicated with the through hole 21.
The holding chamber of reinforcement lamellar body 3 and the through-hole intercommunication that is located the reinforcement lamellar body, and holding chamber and phonate hole 41 intercommunication, because the holding chamber is fixed with water proof membrane 5, the 5 shutoff of water proof membrane is located the through-hole 21 of reinforcement lamellar body 3, and obviously, the through-hole 21 size of reinforcement lamellar body 3 should be less than the size in holding chamber, and the size of water proof membrane 5 should be greater than the through-hole 21 size of reinforcement lamellar body 3.
It can be considered that, the waterproof membrane 5 separates the sound hole 41 and the through hole 21, the waterproof membrane 5 can prevent the liquid from entering the inside of the mike single body 1 through the sound hole 41, and further the waterproof function to the inside of the mike single body 1 is realized, and because the waterproof membrane 5 does not receive the extrusion force from the reinforcing sheet body 3 and the shell assembly 4, the groove wall of the groove 31 does not apply stress to the waterproof membrane 5, therefore, the waterproof membrane 5 vibrates freely on the premise of having the waterproof function, which is helpful for further improving the acoustic performance.
In the use, the external audio frequency that is located the outside of audio frequency module firstly gets into housing assembly 4's sound hole 41, then through water proof membrane 5, water proof membrane 5 vibrates, again through-hole 21 and pickup hole 11 in proper order, finally gets into mike monomer 1, accomplishes the pickup process.
Referring to fig. 4 of the specification, the waterproof film 5 is vertically disposed, the waterproof film 5 generally includes a film body and a laminated layer, the film body is often in a circular sheet shape, the laminated layer is disposed on an edge of the film body, the laminated layer is thicker than the film body, the laminated layer plays a role of supporting the film body, and a right side surface of the laminated layer may be provided with a sticky material such as a double-sided adhesive tape, as described in the first embodiment.
In the using process, the right side face of the lamination layer can be attached to the groove bottom (the right side face of the inner side of the containing cavity) of the groove 31, a certain gap is formed between the left side face of the lamination layer and the left side face of the containing cavity, and a certain gap (which can be set to be about 0.1 mm) can be formed between the side edge of the lamination layer and the upper side and the lower side of the containing cavity, so that the lamination layer (the waterproof film 5) is prevented from touching the two sides of the containing cavity; the stromatolite sets up around the through-hole 21 that is located reinforcement lamellar body 3, because stromatolite and film body link to each other, the projection that is located the through-hole 21 of reinforcement lamellar body 3 along the horizontal direction is thrown on the film body, waterproof membrane 5 only relies on the right flank of stromatolite and the tank bottom (the inboard right flank in holding chamber) of recess 31 to laminate mutually, the upper surface of film body and the tank bottom of recess 31 have the space, the film body does not contact with the tank bottom of recess 31, can guarantee like this that the film body can not receive the extrusion of casing subassembly 4, recess 31 (no matter tank bottom or tank wall) also can not exert stress to waterproof membrane 5 simultaneously, and can strengthen waterproof membrane 5's use intensity to a certain extent through reinforcement lamellar body 3, make waterproof membrane 5 have abundant space and realize the vibration, effectively avoid because of the acoustic performance that deformation leads to is bad.
It can be seen that the membrane body has a vibration space during use, and noise or other poor performance caused by touching the groove 31 during vibration is avoided. Meanwhile, when water enters the sound hole 41, the water presses the waterproof membrane 5 upwards, so that the lamination layer is attached to the bottom of the groove 31 more tightly.
In the installation process, because mike monomer 1 and flexible circuit board 2 set up as an organic whole usually, mike monomer 1 is located the first side of flexible circuit board 2 (also be the right flank of flexible circuit board 2), can laminate reinforcing lamellar body 3 in flexible circuit board 2 one side that does not set up mike monomer 1 (also be the second side, the left flank of flexible circuit board 2) at first, then install inside recess 31 of reinforcing lamellar body 3 with water proof membrane 5, again assemble reinforcing lamellar body 3 and housing assembly 4 to target in place and fixed, utilize seal part to seal mike monomer 1 (including flexible circuit board 2) and reinforcing lamellar body 3 both in the inside of cavity 40 at last, the equipment of audio module up to this moment is accomplished.
It can be seen that the surface (right side) of the left bracket close to the reinforcing sheet 3 can be vertically arranged, the groove 31 can also be vertically arranged, and the depth of the groove 31 can be set to be larger than the thickness of the waterproof membrane 5, so that a gap can be ensured between the waterproof membrane 5 and the shell assembly 4, as shown in the accompanying drawings 2 and 3 of the specification. Of course, in order to prevent the waterproof film 5 from contacting the right side surface of the left bracket, a recessed portion (the right side surface of the left bracket is not horizontally disposed) may be further disposed on the surface (the right side surface) of the left bracket close to the reinforcing sheet 3, the recessed portion is disposed right opposite to the groove 31, and the thickness of the waterproof film 5 may be greater than the depth of the groove 31, so long as it is ensured that the left side surface of the waterproof film 5 does not contact the recessed portion.
Referring to the attached drawing 4 of the specification, the mike single body 1 (including the flexible circuit board 2) and the reinforcing sheet body 3 may be fixed and sealed inside the cavity 40 by the sealant 62, the sealant 62 may be specifically a glue with a slightly dilute consistency, after the reinforcing sheet body 3 and the mike single body 1 are placed at the required positions of the cavity 40, a glue-applying device having the sealant 62, such as a needle, is placed at a position between the mike single body 1 and the bottom of the cavity 40, and then the glue-applying operation is performed, so that the sealant 62 is filled in the cavity 40 from below to above, thereby fixing the reinforcing sheet body 3 and the mike single body 1 relative to the cavity 40 is realized, and the reinforcing sheet body 3 and the mike single body 1 are sealed inside the cavity 40. It can be seen that the method has low requirement on the glue applying process, basically has no risk of glue breaking and overflowing, and has good waterproof performance and sealing effect. Of course, other materials can be used to realize the sealing and fixing processes according to actual needs.
Referring to the description and the attached drawing of fig. 4, the reinforcing sheet 3 and the left bracket are tightly attached, that is, both the right side of the left bracket and the left side of the reinforcing sheet 3 can be set to be flat, when the reinforcing sheet 3 and the housing assembly 4 are assembled, the right side of the left bracket and the left side of the reinforcing sheet 3, which is not provided with the groove 31, are tightly attached together, and the waterproof performance can be ensured to the maximum extent after waterproof sealing; of course, the two surfaces are not limited to a plane, and other structures such as a saw-tooth shape may be adopted according to actual needs, as long as the reinforcing sheet 3 and the left bracket are tightly attached to each other.
For the shape of the accommodating cavity, as shown in fig. 4 in the specification, the left side surface and the right side surface of the inner side of the accommodating cavity can be arranged in parallel, that is, the right side surface of the left bracket and the groove bottom of the groove 31 are parallel to each other, and meanwhile, the groove wall of the groove 31 can be perpendicular to the groove bottom of the groove 31, that is, the accommodating cavity is a rectangular cavity; as described above, since the membrane body of the waterproof membrane 5 tends to be of equal thickness and the laminate is also of equal thickness (the thickness of the laminate is generally greater than that of the membrane body), the accommodating chamber can be set to be of equal height (the left side and the right side inside the accommodating chamber are parallel), thereby ensuring that the waterproof membrane 5 in the accommodating chamber vibrates reliably, which contributes to further improving the acoustic performance.
The reinforcing sheet body 3 and the flexible circuit board 2 can be tightly attached, and the right side surface of the reinforcing sheet body 3 and the left side surface of the flexible circuit board 2 can be vertically arranged, so that the reinforcing sheet body 3 and the flexible circuit board 2 can be tightly attached, and the structure reliability of the audio module is ensured; of course, the right side of the reinforcing sheet 3 and the left side of the flexible printed circuit board 2 may be formed in other shapes as long as the reinforcing sheet 3 and the flexible printed circuit board 2 are tightly attached to each other.
Referring to fig. 4 in the specification, the microphone unit 1 is provided with a sound pickup hole 11, the sound pickup hole 11 is located on the left side of the microphone unit 1, strictly speaking, the sound pickup hole 11 is located at the bottom of the microphone unit 1, and since the microphone unit 1 in the present embodiment is not horizontally placed, but vertically placed, the sound pickup hole 11 is located on the left side of the microphone unit 1.
As shown in fig. 4 of the specification, the housing component 4 is provided with a sound cavity, the sound hole 41 is located at the end of the sound cavity, the sound hole 41 and the through hole 21 are coaxial, that is, the through hole 21, the sound cavity and the sound pickup hole 11 are coaxially arranged, so that the sound pickup hole 11, the through hole 21 and the sound cavity (including the sound hole 41) are horizontal, thereby forming a so-called I-shaped cavity in the prior art to transmit the external audio to the microphone unit 1.
In addition, the electronic device with an audio module provided by the present invention includes the audio module described in the above embodiments; other parts of electronic equipment can refer to prior art, and wherein, electronic equipment can specifically be wearing equipment such as intelligent bracelet, and this text no longer expands.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The electronic device and the audio module thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. An audio module comprises a microphone single body (1) provided with a sound pickup hole (11), wherein the microphone single body (1) is electrically connected to a first side of a flexible circuit board (2), two sides of a reinforcing sheet body (3) are respectively connected with a second side of the flexible circuit board (2) and a shell assembly (4) in a sealing manner, both the flexible circuit board (2) and the reinforcing sheet body (3) are provided with through holes (21) communicated with the sound pickup hole (11), the shell assembly (4) is provided with a sound hole (41) communicated with the through holes (21), and the audio module is characterized in that,
a groove (31) is formed in one side, close to the shell component (4), of the reinforcing sheet body (3), the groove (31) is communicated with the sound hole (41) and the through hole (21) respectively, a waterproof membrane (5) is attached to the groove (31),
waterproof membrane (5) shutoff is located reinforcement lamellar body (3) through-hole (21), waterproof membrane (5) are close to one side of casing subassembly (4) with between casing subassembly (4), and the outer fringe of waterproof membrane (5) with all have the clearance between the cell wall of recess (31).
2. The audio module according to claim 1, wherein the flexible circuit board (2) and the reinforcing sheet (3) are bonded together by a conductive adhesive.
3. The audio module according to claim 1, wherein the microphone unit (1), the flexible circuit board (2), the reinforcing sheet (3) and the housing assembly (4) are sequentially disposed from top to bottom, and the groove (31) is opened on the lower surface of the reinforcing sheet (3).
4. The audio module according to claim 1, wherein the housing assembly (4) is provided with a support, the support forms a cavity (40) for accommodating the microphone unit (1), the flexible circuit board (2) and the reinforcing sheet (3), the microphone unit (1), the flexible circuit board (2) and the reinforcing sheet (3) are fixed and sealed in the cavity (40), the microphone unit (1) and the reinforcing sheet (3) are respectively located at two sides of the cavity (40), and the groove (31) is located on the surface of the reinforcing sheet (3) away from the microphone unit (1).
5. Audio module according to claim 3, characterized in that both the reinforcing sheet (3) and the shell element (4) are sealed by means of a foam of glue (61).
6. The audio module as claimed in claim 4, wherein the microphone unit (1), the flexible circuit board (2) and the reinforcing sheet (3) are fixed and sealed to the cavity (40) by a sealant (62).
7. Audio module according to one of claims 1 to 6, characterized in that the waterproofing membrane (5) comprises a membrane body and a laminate provided at the edge of the membrane body, which laminate fits into the recess (31), which laminate is provided around the through hole (21) in the reinforcing sheet (3), which laminate is thicker than the membrane body, with a clearance between the membrane body and the bottom of the recess (31).
8. Audio module according to any one of claims 1 to 6, characterized in that the side of the shell element (4) that abuts against the reinforcing sheet (3) is parallel to the bottom of the groove (31), the depth of the groove (31) being greater than the thickness of the waterproofing membrane (5).
9. Audio module according to claim 7, characterized in that the groove bottom of the groove (31) is perpendicular to the groove walls of the groove (31).
10. An electronic device comprising an audio module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882625.8A CN110602602A (en) | 2019-09-18 | 2019-09-18 | Electronic equipment and audio module thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882625.8A CN110602602A (en) | 2019-09-18 | 2019-09-18 | Electronic equipment and audio module thereof |
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| CN110602602A true CN110602602A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910882625.8A Pending CN110602602A (en) | 2019-09-18 | 2019-09-18 | Electronic equipment and audio module thereof |
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| CN (1) | CN110602602A (en) |
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| WO2021135116A1 (en) * | 2019-12-31 | 2021-07-08 | 潍坊歌尔微电子有限公司 | Dustproof structure, microphone packaging structure and electronic device |
| WO2021135113A1 (en) * | 2019-12-31 | 2021-07-08 | 潍坊歌尔微电子有限公司 | Dustproof structure, microphone packaging structure, and electronic device |
| WO2021135120A1 (en) * | 2019-12-31 | 2021-07-08 | 潍坊歌尔微电子有限公司 | Dustproof structure, microphone packaging structure and electronic device |
| CN113225416A (en) * | 2021-04-28 | 2021-08-06 | 青岛海信移动通信技术股份有限公司 | Mobile phone |
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Application publication date: 20191220 |