CN211982128U - Vibrating diaphragm dome and loudspeaker - Google Patents
Vibrating diaphragm dome and loudspeaker Download PDFInfo
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- CN211982128U CN211982128U CN202022136294.4U CN202022136294U CN211982128U CN 211982128 U CN211982128 U CN 211982128U CN 202022136294 U CN202022136294 U CN 202022136294U CN 211982128 U CN211982128 U CN 211982128U
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Abstract
A loudspeaker comprises a vibration unit and a magnetic circuit unit, wherein a magnetic gap is formed in the magnetic circuit unit, the vibration unit comprises a vibration diaphragm and a voice coil connected with the vibration diaphragm, the vibration diaphragm comprises a vibration diaphragm ball top and a folding ring surrounding the vibration diaphragm ball top, the vibration diaphragm ball top comprises at least one porous metal layer, the inside of the porous metal layer is of a porous structure, the porous structure comprises a plurality of holes with nanometer sizes, one end of the voice coil is fixedly connected to the vibration diaphragm ball top or the folding ring, and the other end of the voice coil is inserted into the magnetic gap, the vibration diaphragm ball top of the loudspeaker takes the porous metal layer as a main body, other material layers can be compounded on the porous metal layer as required, and because the holes with nanometer sizes are formed in the porous metal layer, the rigidity and the strength of the vibration diaphragm ball top can be improved, and the weight of the vibration diaphragm ball top can, the frequency response characteristic, especially the high-frequency response characteristic of the loudspeaker is effectively improved.
Description
Technical Field
The utility model relates to a speaker technical field especially relates to a speaker and vibrating diaphragm dome thereof.
Background
A speaker is an important acoustic component in a portable electronic device, is used for converting a sound wave signal into a sound signal and transmitting the sound signal, and is an energy conversion device. A loudspeaker generally includes a vibration system and a magnetic circuit system, wherein the vibration system mainly includes a diaphragm and a voice coil. The diaphragm is an important part of the loudspeaker, plays an important role in the sound reproduction performance of the loudspeaker, and determines the conversion quality of the loudspeaker from electric energy to sound energy.
In general, in order to enhance the performance of the high frequency location of the product, a DOME (DOME, which may also be referred to as a reinforcement portion or a composite portion) is provided on the diaphragm. The vibrating diaphragm sequentially comprises an edge part, a folded ring part and a ball top part from outside to inside, wherein the folded ring part of the vibrating diaphragm influences the frequency response of the middle-low frequency part and has good compliance; the dome of the diaphragm affects the frequency response of the high frequency part, and requires good rigidity and light weight. Most of the tops of the existing diaphragms are PMI (polymethacrylimide) foams, the improvement effect on high-frequency response is limited, and the increasingly severe requirements of consumers on the quality of the loudspeaker are difficult to meet.
Disclosure of Invention
In view of the above, a speaker and a diaphragm dome thereof are provided, which effectively improve frequency response characteristics.
In one aspect, the utility model provides a vibrating diaphragm ball-top, the vibrating diaphragm ball-top includes at least one deck porous metal layer, the inside porous structure that is of porous metal layer, porous structure includes that a plurality of size is the hole of nanometer.
Further, the vibrating diaphragm dome further comprises a second layer arranged on the porous metal layer, wherein the second layer is a carbon fiber layer, an engineering plastic layer, a metal layer or a damping layer.
Furthermore, the vibrating diaphragm dome further comprises a third layer arranged on the porous metal layer, the porous metal layer is a middle layer, the second layer and the third layer are respectively located on two opposite sides of the porous metal layer, and the third layer is a carbon fiber layer, an engineering plastic layer, a metal layer or a damping layer.
Further, the carbon fiber layer comprises at least one carbon fiber prepreg laying layer, the carbon fiber prepreg laying layer comprises a unidirectional carbon fiber prepreg laying layer or a multidirectional carbon fiber prepreg laying layer, the fiber directions of the unidirectional carbon fiber prepreg laying layers of different layers are a certain included angle alpha, and the alpha is more than or equal to 0 degree and less than or equal to 90 degrees.
Further, the top of the vibrating diaphragm ball is rectangular or rectangular with round corners, and the radial direction of fibers of the carbon fiber layer is perpendicular to the long axis of the top of the vibrating diaphragm ball.
Further, the orientation angle of the carbon fibers is less than 30 °.
Further, the carbon fibers have a shape factor between 0.1 and 1.5.
Further, the porous metal layer is a nickel-based porous metal layer, a copper-based porous metal layer, a stainless steel-based porous metal layer or an aluminum-based porous metal layer, and the thickness of the porous metal layer is 0.02-1 mm.
On the other hand, the utility model provides a loudspeaker, including vibration unit and magnetic circuit unit, the magnetic circuit unit is formed with the magnetic gap, the vibration unit include the vibrating diaphragm and with the voice coil loudspeaker voice coil that the vibrating diaphragm is connected, the vibrating diaphragm includes above-mentioned vibrating diaphragm ball top and encircles the book ring on vibrating diaphragm ball top, the one end fixed connection of voice coil loudspeaker voice coil to vibrating diaphragm ball top or roll ring, the other end insert to in the magnetic gap.
Compared with the prior art, the utility model discloses the vibrating diaphragm ball top of speaker uses porous metal layer as the main part, can compound other material layers as required on porous metal layer, because be formed with the size in the porous metal layer and be the nanometer hole, can improve the rigidity and the intensity of vibrating diaphragm ball top on the one hand, and reduce the weight of vibrating diaphragm ball top, effectively improve the frequency response characteristic of speaker, especially high-frequency response characteristic; on the other hand vibrating diaphragm ball top can be followed porous metal layer's arbitrary orientation heat conduction for the actual heat exchange area of vibrating diaphragm ball top increases by a wide margin, and the heat dissipation efficiency is high, can distribute away the heat of voice coil loudspeaker voice coil through the vibrating diaphragm ball top fast effectively, effectively promotes the radiating efficiency of vibrating diaphragm ball top.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the speaker of the present invention.
Fig. 2 is a schematic diagram of a diaphragm dome of the loudspeaker shown in fig. 1.
Fig. 3 is a schematic diagram of a second embodiment of a diaphragm dome.
Fig. 4 is a schematic diagram of a third embodiment of a diaphragm dome.
Fig. 5 is a schematic diagram of a fourth embodiment of a diaphragm dome.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. One or more embodiments of the present invention are illustrated in the accompanying drawings to provide a more accurate and thorough understanding of the disclosed embodiments. It should be understood, however, that the present invention may be embodied in many different forms and is not limited to the embodiments described below.
As shown in fig. 1, the speaker of the present invention includes a vibration unit 10 and a magnetic circuit unit 30, wherein the magnetic circuit unit 30 is used for providing an electromagnetic driving force for the vibration unit 10.
In this embodiment, the magnetic circuit unit 30 is a single magnetic circuit structure, and includes a magnetic cover 32, a magnetic steel 34 disposed in the magnetic cover 32, and a central pole piece 36 disposed on the magnetic steel 34. Wherein, the magnetic cover 32 is in a ring structure with one open end and one closed end; the magnetic steel 34 is arranged in the center of the magnetic cover 32, and the magnetic steel and the magnetic cover are spaced in the radial direction to form a magnetic gap 38; a central pole piece 36 is disposed on the magnetic steel 34 and is located at the open end of the magnetic shield 32. In other embodiments, the magnetic circuit unit may be composed of a T-iron, a magnetic steel surrounding the T-iron, and an annular pole piece disposed on the magnetic steel, and a magnetic gap is formed between the T-iron and the magnetic steel. It should be understood that the magnetic circuit unit 30 is not limited to a single magnetic circuit structure, and is not limited to a specific embodiment.
For example, the magnetic circuit unit can be a double magnetic circuit, and is composed of a magnetic cover, magnetic steel, a central pole piece, an annular pole piece and the like, wherein the magnetic steel comprises inner cylindrical magnetic steel and outer annular magnetic steel, the central pole piece is arranged on the inner cylindrical magnetic steel, the annular pole piece is arranged on the outer annular magnetic steel, and a magnetic gap is formed between the inner cylindrical magnetic steel and the outer annular magnetic steel; or, the magnetic circuit unit can be a three-magnetic circuit, and is composed of a magnetic cover, magnetic steel, pole pieces and the like, wherein the magnetic steel comprises central magnetic steel and side magnetic steel, the pole pieces comprise a central pole piece and side pole pieces, the central magnetic steel is positioned in the center of the magnetic cover, the side magnetic steel is positioned on the long axis side or the short axis side of the magnetic cover, the central pole piece is arranged on the central magnetic steel, the side pole pieces are arranged on the side magnetic steel, and a magnetic gap is formed between the central magnetic steel and the side; alternatively, the magnetic circuit unit may be a four-magnetic circuit, a five-magnetic circuit, etc., which are not discussed herein.
The vibration unit 10 includes a diaphragm 12 and a voice coil 14 connected to the diaphragm 12. One end of the voice coil 14 is attached to the diaphragm 12 by bonding or the like, and the other end is inserted into the magnetic gap 38 of the magnetic circuit unit 30. When the voice coil 14 is energized and current flows, the voice coil 14 cuts magnetic lines of force and generates acting force to drive the diaphragm 12 to move up and down together, and the diaphragm 12 drives air to make a sound. The diaphragm 12 includes a central diaphragm dome 16 and a ring 18 surrounding the diaphragm dome 16, wherein the inner edge of the ring 18 overlaps the outer edge of the diaphragm dome 16 and is fixed by adhesive or double-sided adhesive.
The diaphragm dome 16 is positioned against the central pole piece 36/magnet 34. The diaphragm dome 16 includes at least one porous metal layer 20, and the porous metal layer 20 is formed in a thin plate shape by a corresponding process, preferably a hot pressing process, so that the diaphragm dome 16 has an arc shape or other shapes. In the embodiment shown in fig. 2, the diaphragm dome 16 is a single layer of porous metal layer 20; in a second embodiment shown in fig. 3, the top 16a of the diaphragm is a multi-layer structure, that is, includes at least two porous metal layers 20, and adjacent porous metal layers 20 may be bonded and fixed by an adhesive or the like. The porous metal layer 20 may be a nickel-based porous metal layer, a copper-based porous metal layer, a stainless steel-based porous metal layer, or an aluminum-based porous metal layer, has a thickness of 0.02-1mm, and has a large number of nano-sized pores formed therein, and the pores may be continuous pores or independent pores. Because a large number of nanometer-scale holes are formed inside, the mass of the porous metal layer 20 is greatly reduced, and good rigidity is kept; in addition, the existence of the holes greatly increases the heat exchange area of the porous metal layer 20, the heat exchange and heat dissipation capacity is high, the heat of the voice coil 14 can be quickly and effectively dissipated through the vibrating diaphragm ball top 16, the heat dissipation efficiency of the vibrating diaphragm ball top 16 is effectively improved, and the heat dissipation performance of the whole loudspeaker product is greatly improved.
The material of the folding ring 18 can be engineering plastics such as peek, etc., or a glue film such as acrylate glue, organic silica gel, etc., or an elastomer material such as TPU, TPEE, silicone rubber, etc., or a composite composition of one or more of the above materials, and the whole thickness is between 0.01 mm and 0.5 mm. In the embodiment shown in fig. 1, the inner edge of the edge 18 overlaps the outer edge of the diaphragm dome 16, and the voice coil 14 is attached to the diaphragm dome 16 at a position where the diaphragm dome 16 overlaps the edge 18, specifically to the outer edge of the diaphragm dome 16. It should be understood that the inner edge of the edge 18 may also be positioned inside the outer edge of the diaphragm dome 16, in which case the voice coil 14 may be attached to the inner edge of the edge 18.
The top of the diaphragm ball can also be a multi-layer structure formed by compounding porous metal materials with other materials. In a third embodiment, as shown in fig. 4, the diaphragm dome 16b has a double-layer structure including a first layer 20 and a second layer 22 stacked one on another. Wherein the first layer 20 is a porous metal layer; the second layer 22 may be a carbon fiber layer, an engineering plastic layer, a metal layer such as an aluminum layer, an aluminum alloy layer, a magnesium lithium alloy layer, etc., a damping layer such as a rubber layer, etc. In other embodiments, the top of the diaphragm sphere may also be a multi-layer structure formed by a plurality of first layers 20 alternating with a plurality of second layers 22.
In a fourth embodiment, as shown in fig. 5, the diaphragm dome 16c is a three-layer sandwich structure including a first layer 20 in the middle and a second layer 22 and a third layer 26 respectively stacked on opposite sides of the first layer 20. Wherein the first layer 20 is a porous metal layer; the second layer 22 and the third layer 26 are made of the same material, and may be a carbon fiber layer, an engineering plastic layer, a metal layer such as an aluminum layer, an aluminum alloy layer, a magnesium-lithium alloy layer, etc., and a damping layer such as a rubber layer, etc. It should be understood that the materials of the second layer 22 and the third layer 26 may be the same or different.
In the third and fourth embodiments of the present invention, the carbon fiber layer is used as the second layer 22 and/or the third layer 26 of the top 16b, 16c of the diaphragm. The carbon fiber layers 22 and 26 comprise at least one carbon fiber prepreg laying layer, the carbon fiber prepreg laying layer comprises a unidirectional carbon fiber prepreg laying layer or a multidirectional carbon fiber prepreg laying layer, the fiber direction of the unidirectional carbon fiber prepreg laying layers of different layers is a certain included angle alpha, and the alpha is more than 0 degree and less than 180 degrees. Preferably, the angle α between the fibre directions of the unidirectional carbon fibre prepreg plies of the different layers is 90 °.
The diaphragm ball tops 16b and 16c are rectangles or rectangles with round corners, the radial directions of the fibers of the carbon fiber layers 22 and 26 are perpendicular to the long axes of the diaphragm ball tops 16b and 16c, according to the direction of the loudspeaker shown in fig. 1, the long axis directions of the diaphragm ball tops 16b and 16c are horizontal directions, and the radial directions of the fibers of the carbon fiber layers 22 and 26 are vertical directions. The carbon fiber prepreg is formed by impregnating or spraying uncured resin on a carbon fiber material, and curing the resin on the carbon fiber after high-temperature treatment. Preferably, the formed carbon fiber prepreg is a unidirectional carbon fiber prepreg paving layer, the molecular structure is regularly arranged after high-temperature treatment, and the nitrogen content is less than 6%.
The carbon fiber is formed by stacking organic fibers such as flake graphite microcrystals along the axial direction of the fiber, and the microcrystalline graphite material obtained by carbonization and graphitization treatment has the advantages of light weight compared with metal aluminum, higher strength than steel, corrosion resistance, high strength and high modulus. Compared with conventional glass fibers, carbon fibers have a Young's modulus that is more than 3 times that of conventional glass fibers. In addition, the carbon fiber also has good electric and heat conducting performance, electromagnetic shielding performance and the like.
In the carbon fiber structure, a graphite microcrystal and a fiber shaft form a certain included angle phi, which is called an orientation angle; crystallite packing thickness/crystallite basal plane width Lc/LallReferred to as a form factor. Orientation angle phi, shape factor Lc/ LallThe magnitude of (a) can affect the modulus of the carbon fiber, specifically:
when the fiber crystallites are axially parallel to the fiber, the orientation angle φ is 0, and the modulus is:
when the fiber crystallite has an included angle with the fiber axis, the modulus is:
shape factor Lc/ LallAt a certain time, the modulus decreases with increasing orientation angle φ. When angle of orientation phi<When the temperature is 30 ℃, the modulus is larger, and the corresponding acoustic performance is better; orientation angle phi>At 30 degrees, the modulus loss of the fiber microcrystals is large, the modulus reflected on the fiber protofilament is reduced in response, and the acoustic high-frequency FR is improved slightly. Therefore, the orientation angle phi of the carbon fiber of the utility model< 30°。
The modulus with the shape factor L at a constant orientation angle phic/ LallIncreasing first and then decreasing. Shape factor Lc/ LallModulus loss is greater at less than 0.1 or greater than 1.5. Therefore, the shape factor L of the carbon fiber of the utility modelc/ LallBetween 0.1 and 1.5.
And (3) curing the carbon fiber prepreg and the porous metal layer through hot pressing to form the vibrating diaphragm ball top. In the process of hot-pressing curing, the carbon fiber layer and the porous metal layer are integrally connected through resin contained in the carbon fiber prepreg, so that the carbon fiber layer and the porous metal layer are not required to be additionally bonded, the bonding is firm, the process is simple, and the required size can be cut out subsequently according to the requirement. According to actual requirements, a single-layer carbon fiber prepreg and a porous metal layer can be subjected to hot-pressing curing to form a vibrating diaphragm ball top 16b with a double-layer structure; or, the vibrating diaphragm ball top 16c with a three-layer sandwich structure can be formed by hot-pressing and curing two layers of carbon fiber prepregs clamping the porous metal layer; or, alternatively, a plurality of layers of carbon fiber prepregs and a plurality of layers of porous metal layers are alternately arranged according to a predetermined rule and are hot-pressed and cured to form the diaphragm ball top with a multilayer structure.
The utility model discloses the vibrating diaphragm ball top of speaker uses porous metal layer 20 as the main part, can compound one deck or multilayer other materials on porous metal layer 20 as required, because the size that is distributed a large amount of intercommunications and non-intercommunications in porous metal layer 20 is the nanometer hole, can improve the rigidity and the intensity of vibrating diaphragm ball top on the one hand, and reduce the weight of vibrating diaphragm ball top, effectively improve the frequency response characteristic of speaker, especially high frequency response characteristic; on the other hand, the porous metal layer 20 enables the vibrating diaphragm ball top to conduct heat along any direction of the porous metal layer, and the porous structure enables the heat exchange area of the vibrating diaphragm ball top to be greatly increased, so that the radiating efficiency of the vibrating diaphragm ball top can be effectively improved, and the loudspeaker can be guaranteed to work within a proper temperature range.
The test shows that the high-frequency sensitivity after 8kHz can be effectively improved, the high frequency is expanded, the Frequency Response (FR) curve is smoother, and the musical instrument is richer in playing by adopting the loudspeaker with the vibrating diaphragm ball top of the three-layer sandwich structure formed by the porous metal layer and the carbon fiber layer; when a high-frequency signal is played, harmonic components can be reduced, harmonic distortion (THD) is effectively improved, noise is low (Rub & Buzz), and subjective auditory sensation is clearer.
It should be noted that the present invention is not limited to the above embodiments, and other changes can be made by those skilled in the art according to the spirit of the present invention, and all the changes made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. The vibrating diaphragm ball top is characterized by comprising at least one porous metal layer, wherein a porous structure is arranged in the porous metal layer, and the porous structure comprises a plurality of holes with nanoscale sizes.
2. The diaphragm dome of claim 1, further comprising a second layer disposed on the porous metal layer, wherein the second layer is a carbon fiber layer, an engineering plastic layer, a metal layer, or a damping layer.
3. The diaphragm dome of claim 2, further comprising a third layer disposed on the porous metal layer, wherein the porous metal layer is a middle layer, the second layer and the third layer are respectively disposed on two opposite sides of the porous metal layer, and the third layer is a carbon fiber layer, an engineering plastic layer, a metal layer, or a damping layer.
4. The diaphragm dome as claimed in claim 2 or 3, wherein the carbon fiber layer comprises at least one carbon fiber prepreg laying layer, the carbon fiber prepreg laying layer comprises a unidirectional carbon fiber prepreg laying layer or a multidirectional carbon fiber prepreg laying layer, and the fiber directions of the unidirectional carbon fiber prepreg laying layers of different layers form a certain included angle α, wherein α is greater than 0 degree and less than or equal to 90 degrees.
5. The diaphragm dome of claim 4, wherein the diaphragm dome is rectangular or rectangular with rounded corners, and the radial direction of the fibers of the carbon fiber layer is perpendicular to the long axis of the diaphragm dome.
6. The diaphragm dome of claim 4, wherein the carbon fibers are oriented at an angle of less than 30 °.
7. The diaphragm dome of claim 4, wherein the carbon fiber has a form factor of between 0.1 and 1.5.
8. The diaphragm dome as claimed in claim 1, wherein the porous metal layer is a nickel-based porous metal layer, a copper-based porous metal layer, a stainless steel-based porous metal layer, or an aluminum-based porous metal layer, and the thickness of the porous metal layer is 0.02-1 mm.
9. The utility model provides a loudspeaker, includes vibration unit and magnetic circuit unit, the magnetic circuit unit is formed with the magnetic gap, the vibration unit include the vibrating diaphragm and with the voice coil loudspeaker voice coil that the vibrating diaphragm is connected which characterized in that: the diaphragm comprises the diaphragm ball top of any one of claims 1 to 8 and a corrugated rim surrounding the diaphragm ball top, wherein one end of the voice coil is fixedly connected to the diaphragm ball top or the corrugated rim, and the other end of the voice coil is inserted into the magnetic gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022136294.4U CN211982128U (en) | 2020-09-25 | 2020-09-25 | Vibrating diaphragm dome and loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022136294.4U CN211982128U (en) | 2020-09-25 | 2020-09-25 | Vibrating diaphragm dome and loudspeaker |
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| CN211982128U true CN211982128U (en) | 2020-11-20 |
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| CN202022136294.4U Active CN211982128U (en) | 2020-09-25 | 2020-09-25 | Vibrating diaphragm dome and loudspeaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112543399A (en) * | 2020-11-30 | 2021-03-23 | 歌尔股份有限公司 | Diaphragm assembly and loudspeaker |
| CN112770234A (en) * | 2021-02-02 | 2021-05-07 | 歌尔股份有限公司 | Sound monomer |
-
2020
- 2020-09-25 CN CN202022136294.4U patent/CN211982128U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112543399A (en) * | 2020-11-30 | 2021-03-23 | 歌尔股份有限公司 | Diaphragm assembly and loudspeaker |
| WO2022111366A1 (en) * | 2020-11-30 | 2022-06-02 | 歌尔股份有限公司 | Diaphragm assembly and loudspeaker |
| CN112543399B (en) * | 2020-11-30 | 2023-08-18 | 歌尔股份有限公司 | Vibrating diaphragm assembly and loudspeaker |
| CN112770234A (en) * | 2021-02-02 | 2021-05-07 | 歌尔股份有限公司 | Sound monomer |
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