CN211089959U - A electrically conductive vibrating diaphragm and sound generating mechanism for sound generating mechanism - Google Patents
A electrically conductive vibrating diaphragm and sound generating mechanism for sound generating mechanism Download PDFInfo
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- CN211089959U CN211089959U CN202020010879.9U CN202020010879U CN211089959U CN 211089959 U CN211089959 U CN 211089959U CN 202020010879 U CN202020010879 U CN 202020010879U CN 211089959 U CN211089959 U CN 211089959U
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Abstract
The utility model relates to a conductive vibrating diaphragm for sound generating mechanism. The conductive vibrating diaphragm comprises a plane part positioned in the middle part, a folded ring part connected with the plane part and an edge part connected with the folded ring part; the conductive diaphragm comprises a composite structure layer and a second elastomer layer; the composite structure layer comprises a first elastomer layer, a conductive layer and a glue layer positioned between the first elastomer layer and the conductive layer; the conductive layer comprises a metal foil and conductive adhesive, and the metal foil and the conductive adhesive are sequentially connected along the length direction of the elastomer layer; the metal foil is connected to the edge part and the plane part; the conductive adhesive is positioned on the folded ring part; and the composite structure layer and the second elastic body layer are synthesized into the conductive diaphragm in a hot pressing mode. The utility model discloses avoided when rolling over ring portion and setting up the metal foil, the vibrating diaphragm warp seriously, takes place the distortion easily, the poor problem of vibrating diaphragm roughness.
Description
Technical Field
The utility model relates to an acoustics technical field, more specifically, the utility model relates to a conductive vibrating diaphragm and sound generating mechanism for sound generating mechanism.
Background
The sound generating device generally includes a diaphragm and a voice coil coupled to one side of the diaphragm, and further includes an electrical connector electrically connecting an internal circuit and an external circuit of the sound generating device. The voice coil comprises two voice coil leads, the two voice coil leads are respectively electrically connected with two bonding pads of the electric connecting piece in a spot welding mode and the like, and the electric connecting piece is simultaneously electrically connected with an external circuit to control an electric signal in the voice coil through the electric signal of a terminal product.
Generally, the lead of the voice coil needs to be threaded out to a certain length, and the lead is suspended to be electrically connected with the electrical connector. Although the suspension lead structure can realize higher sensitivity, the amplitude cannot be too large due to the suspension limitation of the lead, the wire breakage risk is higher, the low-frequency effect is not obvious enough, and better user auditory experience cannot be provided.
In view of any of the above technical problems, the present invention provides a conductive diaphragm for a sound generating device and a sound generating device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a conductive vibrating diaphragm and sound generating mechanism for sound generating mechanism.
According to the utility model discloses an aspect provides a conductive vibrating diaphragm for sound generating mechanism. The conductive vibrating diaphragm comprises a plane part positioned in the middle part, a folded ring part connected with the plane part and an edge part connected with the folded ring part;
The conductive diaphragm comprises a composite structure layer and a second elastomer layer;
The composite structure layer comprises a first elastomer layer, a conductive layer and a glue layer positioned between the first elastomer layer and the conductive layer; the conducting layer and the first elastomer layer are bonded and fixed by the glue layer;
The conductive layer comprises a metal foil and conductive adhesive, and the metal foil and the conductive adhesive are sequentially connected along the length direction of the elastomer layer;
The metal foil is connected to the edge part and the plane part;
The conductive adhesive is positioned on the folded ring part;
And the composite structure layer and the second elastic body layer are synthesized into the conductive diaphragm in a hot pressing mode.
Optionally, the hardness ranges of the first elastomer layer and the second elastomer layer are both 40A-90A; the thickness range of the first elastomer layer is: 3-150 μm;
The thickness range of the second elastomer layer is: 3-100 μm.
Optionally, the material of the first elastomer layer and the second elastomer layer comprises a rubber material or a silicone material.
Optionally, the material of the first elastomer layer comprises any one of methyl silicone rubber, dimethyl silicone rubber, methyl vinyl silicone rubber, nitrile silicone rubber, fluorine rubber, styrene butadiene rubber, triethyl acrylic rubber, ethylene acrylate rubber and polyacrylate rubber;
The material of the second elastomer layer comprises any one of methyl silicone rubber, dimethyl silicone rubber, methyl vinyl silicone rubber, nitrile silicone rubber, fluorine rubber, styrene-butadiene rubber, triethyl acrylic rubber, ethylene acrylate rubber and acrylate rubber.
Optionally, the thickness of the metal foil is in the range of: 2-150 μm;
The thickness range of the conductive adhesive is as follows: 2-150 μm.
Optionally, through holes are opened on the edge portion and the planar portion of the first or second elastomer layer, and an electrical connector is disposed at the through holes.
Optionally, the hot-pressing manner of the composite structure layer and the second elastomer layer includes: one or more forms of compression molding, gas explosion molding and vacuum plastic molding are combined.
Optionally, the metal foil is a copper foil.
Optionally, the adhesive layer includes at least one of a silicone layer and a double-sided adhesive layer.
According to the utility model discloses another aspect provides a sound generating mechanism. The sound production device comprises the conductive diaphragm.
The utility model has the technical effects that the utility model provides a conductive vibrating diaphragm, wherein the edge part and the plane part of the conductive vibrating diaphragm are provided with metal foils, and the corrugated part of the conductive vibrating diaphragm is provided with conductive adhesive; compare and all set up the metal foil on the surface of vibrating diaphragm and compare among the prior art, the utility model discloses avoided when rolling over ring portion and set up the metal foil, the vibrating diaphragm warp seriously, takes place the distortion easily, the poor problem of vibrating diaphragm roughness.
On the other hand, the utility model discloses set up the metal foil piece at the plane portion and the edge part of vibrating diaphragm, improved the structural strength of vibrating diaphragm, make the difficult production of these two parts warp.
On the other hand, the hardness of the first elastomer layer and the second elastomer layer of the utility model is 40A-90A, so that the modulus of the first elastomer layer and the second elastomer layer is lower, the first elastomer layer and the second elastomer layer have better damping effect, and the resonance frequency F0 of the produced sound production device is lower compared with other traditional materials; the low-frequency distortion rate is better, and the acoustic performance of the low-frequency sound generating device can be improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of the conductive diaphragm of the present invention.
Fig. 2 is a top view of the conductive diaphragm of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to an embodiment of the present invention, a conductive diaphragm for a sound generating apparatus is provided, wherein the conductive diaphragm includes a planar portion 03 located at a middle portion, a corrugated portion 02 connected to the planar portion 03, and an edge portion 01 connected to the corrugated portion 02;
The ring-folded part 02 surrounds the plane part 03 and is arranged and combined with the plane part 03 in a sealing mode, the edge part 01 surrounds the outer edge of the ring-folded part 02 and is connected with the ring-folded part 02 as a whole, and therefore the conductive vibrating diaphragm is fixed on a shell of the sound generating device. Wherein the rim portion 01 is configured for fixed connection with a housing of a sound emitting device. The planar portion 03 is configured to be connected to a voice coil of a sound generating device.
The conductive diaphragm comprises a composite structure layer and a second elastomer layer 102;
The composite structure layer comprises a first elastomer layer 101, a conductive layer 104 and a glue layer 103 positioned between the first elastomer layer 101 and the conductive layer 104; the conductive layer 104 is fixedly connected to the first elastomer layer 101 through the glue layer 103. The glue layer 103 of the present example improves the connection reliability and the reliability of the conductive layer 104 and the first elastomer layer 101.
The conductive layer comprises a metal foil 1041 and a conductive adhesive 1042, wherein the metal foil 1042 and the conductive adhesive 1042 are connected in sequence; the metal foil 1042 is connected to the edge 01 and the planar portion 03; the conductive adhesive 1042 is located on the folded ring portion 02.
For example, the conductive paste 1042 is connected to the edge of the metal foil 1041; or the metal foil 1041 covers part of the conductive adhesive 1042, so that the metal foil 1041 is connected with the conductive adhesive 1042 to ensure the connection reliability between two pieces, and realize good conductive connection effect, and the connection part between two pieces cannot be separated in the vibration process of the conductive diaphragm.
And the composite structure layer and the second elastic body layer are synthesized into the conductive diaphragm in a hot pressing mode.
Adopt metal foil 1041 as the conducting layer among the prior art, but when metal foil adopted the bonding mode to fix on the dog-ear portion, because metal foil 1041 is inconsistent with the resilience and the tensile properties of glue film, lead to conductive vibrating diaphragm in the manufacture process, conductive vibrating diaphragm's roughness is relatively poor.
In this example, a metal foil 1041 is attached to the edge portion 01 and the flat portion 03, and a conductive paste 1042 is disposed on the folded portion 02. The edge part 01 and the plane part 03 of the conductive diaphragm are of a plane structure, so that the connection and the fixation of the metal foil 1031 are facilitated; when the metal foil 1031 is attached to the edge portion and the flat surface portion, the structural strength of the edge portion 01 and the flat surface portion 03 can be improved, so that the two portions are not easily deformed; the conducting layer is configured to be electrically connected with the outgoing line of the voice coil and an external circuit, and the metal foil is adopted to resist high temperature during welding, so that the elastic body layer of the conductive vibrating diaphragm is not scalded.
On the other hand, the composite structure layer is fixed in a bonding mode, the composite structure layer and the second elastic body layer are fixed in a hot pressing mode, the conductive vibrating diaphragm is manufactured in two different technological processes, and compared with the conductive vibrating diaphragm which is fixed only in the bonding mode in the prior art, the second elastic body layer and the composite structure are combined in the hot pressing mode, so that the bonding strength of the first elastic body layer and the conductive layer is improved; compared with the prior art in which the conductive diaphragm is synthesized only by adopting hot press molding, the present example only carries out hot press on the second elastic body layer and the composite structure layer which is compounded together, and does not need to apply too much pressure, so that the surface structures of the first elastic body layer and the second elastic body layer are not damaged to a certain extent.
In an alternative embodiment, the material of the first and second elastomer layers 101 and 102 includes a rubber material or a silicone material. The first elastomer layer 101 and the second elastomer layer 102 of the present invention may be made of rubber. The rubber material has better fluidity, and the outline dimension of the elastic body layer obtained by molding can more easily meet the design requirement. The elastomer layer obtained by using the rubber material has higher strength and can meet the requirement of the working condition of repeated vibration.
Or the first elastomer layer 101 and the second elastomer layer 102 are made of a silicone material, so that the silicone material is easy to form and meets design requirements more easily.
Optionally, the material of the first elastomer layer comprises any one of methyl silicone rubber, dimethyl silicone rubber, methyl vinyl silicone rubber, nitrile silicone rubber, fluorine rubber, styrene butadiene rubber, triethyl acrylic rubber, ethylene acrylate rubber and polyacrylate rubber;
The material of the second elastomer layer comprises any one of methyl silicone rubber, dimethyl silicone rubber, methyl vinyl silicone rubber, nitrile silicone rubber, fluorine rubber, styrene-butadiene rubber, triethyl acrylic rubber, ethylene acrylate rubber and acrylate rubber.
The material of the first elastomer layer 101 may be the same as or different from the material of the second elastomer layer 101.
In an alternative example, the first and second elastomeric layers each have a hardness in the range of 40A to 90A; the thickness range of the first elastomer layer is: 3-150 μm; the thickness range of the second elastomer layer is: 3-100 μm. The inventor finds that when the hardness of the first elastomer layer and the hardness of the second elastomer layer are within the range and the thickness of the first elastomer layer and the second elastomer layer is within the range, the first elastomer layer 101 and the second elastomer layer 102 have low modulus and high damping performance, but the resonance frequency of the sound generating device cannot be increased, the low-frequency acoustic performance of the sound generating device is improved, and the problem that the thickness of the traditional thermoplastic engineering plastics or thermoplastic elastomers cannot be increased due to high modulus is solved; the conductive diaphragm of the present example has suitable rigidity and flexibility as a whole, so that the conductive diaphragm can be more stable during vibration. On the other hand, the first elastomer layer 101 and the second elastomer layer may protect the conductive layer 104.
In an alternative example, the thickness of the metal foil is in the range of: 2-150 μm; the thickness range of the conductive adhesive is as follows: 2-150 μm.
For example, the metal foils 1031 are all copper foils. The copper foil is a thin sheet structure, has low surface oxidation characteristic and can be easily attached to the surfaces of the elastomer layers made of different materials. And the copper material has better conductivity, so that the formed conductive diaphragm has good conductivity.
On the other hand, the present inventors have found that the thickness of the metal foil within this range can improve the strength of the conductive diaphragm without reducing the vibration performance of both the first and second elastic layers 101 and 102, for example, without affecting the vibration elasticity and vibration damping performance of the conductive diaphragm as a whole, and without affecting the acoustic performance of the sound generating device when the conductive diaphragm is applied to the sound generating device.
The present inventors have found that when the thickness of the conductive paste is within this range, the compounding in the elastomer layer is highly reliable and the resistance is small. Optionally, when the metal foil 1041 and the conductive paste 1042 are attached to the elastomer layer, the thicknesses of the two remain the same, so as to improve the flatness of the conductive diaphragm.
In an alternative example, through holes are opened in the edge portions and the planar portions of the first elastomer layer and/or the second elastomer layer, and electrical connection members are provided at the through holes.
For example, a via hole is opened in the first elastomer layer 101, wherein the via hole penetrates through the glue layer 103, and the via hole is configured to expose the conductive layer 104.
Alternatively, a via is opened in the second elastomer layer 102, the via being configured to expose the conductive layer 104.
For example, the peripheral edge part is bonded with the shell, and the edge part 01 is provided with a through hole of a conductive end formed by material removal; the central plane part 03 is bonded with the ball top, and the central plane part 01 is provided with a through hole of a conductive end formed by material removal; an electrical connection member a is disposed on the opened via, for example, the electrical connection member a may be a bonding pad or other conductive member. The metal foil is electrically connected with the lead-out wire of the voice coil or an external circuit through an electric connector.
In an alternative example, the hot-pressing of the composite structure layer and the second elastomer layer includes: one or more forms of compression molding, gas explosion molding and vacuum plastic molding are combined. The composite structure layer and the second elastomer layer of the conductive diaphragm are formed in an integrated hot-pressing mode, so that the surface density of the conductive diaphragm is improved, the connection strength of the first elastomer layer and the conductive layer is also improved, and the overall connection strength and connection reliability of the conductive diaphragm are improved.
In an alternative example, the metal foil is a copper foil. For example, the copper foil may be a rolled copper foil, an electroplated copper foil, or a sputtered copper foil. For example, when using a wrought copper foil, the wrought copper foil has excellent tensile strength and high elongation, and good ductility when combined with the first elastomeric layer. The metal foil at the edge portion 01 and the metal foil at the flat portion 03 are not limited to be made of the same material, and may be made of metal foils of different materials according to specific needs.
In an optional example, the adhesive layer includes at least one of a silicone layer and a double-sided adhesive layer. For example, the glue layer adopts the silica gel layer, so that the defect that the damping characteristic of the traditional composite vibrating diaphragm material is insufficient is overcome by the conductive vibrating diaphragm, and the low-frequency acoustic performance of the sound generating device is improved.
According to the utility model discloses another aspect provides a sound generating mechanism. The sound production device comprises a vibration assembly, and the vibration assembly comprises the conductive vibrating diaphragm and a voice coil; a magnetic circuit system configured to provide a magnetic field for the voice coil; the voice coil is configured to vibrate under the action of a magnetic field when an electric signal is input, and transmit the vibration to the diaphragm assembly, and the diaphragm assembly generates a sound signal through vibration.
Sound generating mechanism adopts during the conductive vibrating diaphragm, conductive vibrating diaphragm has better surface smoothness, bonds the voice coil loudspeaker voice coil on this conductive vibrating diaphragm, can guarantee the centrality of voice coil loudspeaker voice coil, and then improves the sound generating mechanism's that has above-mentioned conductive vibrating diaphragm acoustic performance.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A conductive vibrating diaphragm for a sound production device is characterized by comprising a plane part positioned in the middle, a folded ring part connected with the plane part and an edge part connected with the folded ring part;
The conductive diaphragm comprises a composite structure layer and a second elastomer layer;
The composite structure layer comprises a first elastomer layer, a conductive layer and a glue layer positioned between the conductive layer and the first elastomer layer; the conducting layer and the first elastomer layer are bonded and fixed by the glue layer;
The conducting layer comprises a metal foil and conducting adhesive, and the metal foil and the conducting adhesive are connected in sequence;
The metal foil is connected to the edge part and the plane part;
The conductive adhesive is positioned on the folded ring part;
And the composite structure layer and the second elastic body layer are synthesized into the conductive diaphragm in a hot pressing mode.
2. The conductive diaphragm of claim 1, wherein the first elastomer layer and the second elastomer layer each have a hardness in the range of 40A to 90A;
The thickness range of the first elastomer layer is: 3-150 μm; the thickness range of the second elastomer layer is: 3-100 μm.
3. The conductive diaphragm of claim 1, wherein the material of the first elastomer layer and the second elastomer layer comprises a rubber material or a silicone material.
4. The conductive diaphragm of claim 3, wherein the material of the first elastomer layer comprises any one of methyl silicone rubber, dimethyl silicone rubber, methyl vinyl silicone rubber, nitrile silicone rubber, fluorine rubber, styrene-butadiene rubber, triethyl acrylate rubber, ethylene acrylate rubber and polyacrylate rubber;
The material of the second elastomer layer comprises any one of methyl silicone rubber, dimethyl silicone rubber, methyl vinyl silicone rubber, nitrile silicone rubber, fluorine rubber, styrene-butadiene rubber, triethyl acrylic rubber, ethylene acrylate rubber and acrylate rubber.
5. The conductive diaphragm of claim 1, wherein the metal foil has a thickness in a range of: 2-150 μm;
The thickness range of the conductive adhesive is as follows: 2-150 μm.
6. The conductive diaphragm of claim 1, wherein a through hole is formed in the edge portion and the planar portion of the first elastomer layer or the second elastomer layer, and an electrical connector is provided at the through hole.
7. The conductive diaphragm of claim 1, wherein the hot-pressing of the composite structure layer and the second elastomer layer comprises: one or more forms of compression molding, gas explosion molding and vacuum plastic molding are combined.
8. The conductive diaphragm of claim 1, wherein the metal foil is a copper foil.
9. The conductive diaphragm of claim 1, wherein the adhesive layer includes at least one of a silicone layer and a double-sided adhesive layer.
10. A sound-generating device, comprising the conductive diaphragm according to any one of claims 1 to 9.
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| CN202020010879.9U CN211089959U (en) | 2020-01-03 | 2020-01-03 | A electrically conductive vibrating diaphragm and sound generating mechanism for sound generating mechanism |
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| CN202020010879.9U CN211089959U (en) | 2020-01-03 | 2020-01-03 | A electrically conductive vibrating diaphragm and sound generating mechanism for sound generating mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925586A (en) * | 2020-09-23 | 2020-11-13 | 歌尔股份有限公司 | Vibrating diaphragm of sound production device, preparation method of vibrating diaphragm and sound production device |
| WO2022062813A1 (en) * | 2020-09-23 | 2022-03-31 | 歌尔股份有限公司 | Diaphragm of sound generating device, preparation method therefor, and sound generating device |
| CN114286261A (en) * | 2021-12-30 | 2022-04-05 | 歌尔股份有限公司 | Vibrating diaphragm and preparation method thereof, sound production device and electronic equipment |
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2020
- 2020-01-03 CN CN202020010879.9U patent/CN211089959U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925586A (en) * | 2020-09-23 | 2020-11-13 | 歌尔股份有限公司 | Vibrating diaphragm of sound production device, preparation method of vibrating diaphragm and sound production device |
| CN111925586B (en) * | 2020-09-23 | 2021-01-22 | 歌尔股份有限公司 | Vibrating diaphragm of sound production device, preparation method of vibrating diaphragm and sound production device |
| WO2022062813A1 (en) * | 2020-09-23 | 2022-03-31 | 歌尔股份有限公司 | Diaphragm of sound generating device, preparation method therefor, and sound generating device |
| CN114286261A (en) * | 2021-12-30 | 2022-04-05 | 歌尔股份有限公司 | Vibrating diaphragm and preparation method thereof, sound production device and electronic equipment |
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