CN109672965A - A kind of sounding device - Google Patents
A kind of sounding device Download PDFInfo
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- CN109672965A CN109672965A CN201811457260.6A CN201811457260A CN109672965A CN 109672965 A CN109672965 A CN 109672965A CN 201811457260 A CN201811457260 A CN 201811457260A CN 109672965 A CN109672965 A CN 109672965A
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- carbon fiber
- sounding device
- strengthening course
- initial rinse
- fibre initial
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
Abstract
The invention discloses a kind of sounding devices.The device includes: magnetic circuit system, and the magnetic circuit system is configurable for forming magnetic field；And vibrational system, the vibrational system includes voice coil, vibrating diaphragm and strengthening course, one end of the voice coil is connect with the central part of the vibrating diaphragm, the other end is located in the magnetic field, the strengthening course is arranged on the central part, the strengthening course includes the carbon fibre initial rinse bed of material, and the graphite microcrystal angle of orientation of the carbon fiber in the carbon fibre initial rinse bed of material is less than or equal to 30 °, and the angle of orientation is the angle of graphite microcrystal and fiber axis.
Description
Technical field
The present invention relates to electroacoustic switch technology fields, more particularly, to a kind of sounding device.
Background technique
Loudspeaker monomer carries out sounding by vibrational system.Vibrational system includes vibrating diaphragm, voice coil and strengthening course.Strengthening course is logical
Often it is prepared by plastics, metal.The elasticity modulus of both materials is low, and the strengthening course in high frequency is caused to be easy to happen deformation.
The vibration of each section of strengthening course is inconsistent, will lead to loudspeaker monomer and noise occurs, greatly reduces hearing effect.
Accordingly, it is desirable to provide a kind of new technical solution, to solve the above technical problems.
Summary of the invention
It is an object of the present invention to provide a kind of new solutions of sounding device.
According to the first aspect of the invention, a kind of sounding device is provided.The device includes: magnetic circuit system, the magnetic circuit
System is configurable for forming magnetic field；And vibrational system, the vibrational system include voice coil, vibrating diaphragm and strengthening course, it is described
One end of voice coil is connect with the central part of the vibrating diaphragm, and the other end is located in the magnetic field, and the strengthening course is arranged on described
Central part, the strengthening course include the carbon fibre initial rinse bed of material, and the graphite microcrystal of the carbon fiber in the carbon fibre initial rinse bed of material takes
It is less than or equal to 30 ° to angle, the angle of orientation is the angle of graphite microcrystal and fiber axis.
Optionally, the form factor of the carbon fiber in the carbon fibre initial rinse bed of material is 0.1-1.5, and the form factor is
The ratio between the base width for piling up thickness and graphite microcrystal of graphite microcrystal.
Optionally, the nitrogen content of the carbon fiber in the carbon fibre initial rinse bed of material is less than or equal to 6%.
Optionally, the carbon fiber in the carbon fibre initial rinse bed of material is single layer or multilayer, the carbon fiber being located on the same floor
It is unidirectional and be set side by side.
Optionally, the strengthening course includes foamed core and is connected to two of upper and lower surfaces of the foamed core
The carbon fibre initial rinse bed of material.
It optionally, further include at least one far from the foamed core for being bonded respectively to the carbon fibre initial rinse bed of material
Serving on surface, the serving are sealing material.
Optionally, the serving is at least one of engineering plastics, aluminium and damping material.
Optionally, the strengthening course is prepared using hot pressing co-curing.
Optionally, the strengthening course is in rectangle, the strengthening course include first while and when second, the length on first side
More than or equal to the length on second side, the folder of the carbon fiber main direction of the carbon fibre initial rinse bed of material and first side
Angle is 45-90 °.
Optionally, the strengthening course with a thickness of 0.02-0.5 millimeters.
According to one embodiment of the disclosure, which has the characteristics that high frequency performance is excellent.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the cross-sectional view according to the sounding device of one embodiment of the disclosure.
Fig. 2 is the structural schematic diagram according to the strengthening course of one embodiment of the disclosure.
Fig. 3 is the main view according to the strengthening course of one embodiment of the disclosure.
Fig. 4 is the schematic diagram that graphite microcrystal is orientated along fiber axis.
Fig. 5 is that graphite microcrystal and fiber are axially in the schematic diagram for setting angle orientation.
Fig. 6 is the sounding device of the embodiment of the present disclosure and the sound pressure level comparison diagram of existing sounding device.
Fig. 7 is the sounding device of the embodiment of the present disclosure and the THD comparison diagram of existing sounding device.
Fig. 8 is the sounding device of the embodiment of the present disclosure and the R&B comparison diagram of existing sounding device.
Fig. 9-10 is the cross-sectional view of strengthening course according to an embodiment of the present disclosure
Description of symbols:
11: vibrating diaphragm；13: edge part；14: ring portion；15: strengthening course；16: voice coil；17: centring disk；18: magnetic gap；
19: magnetic circuit system；20: carbon fiber；21: pre-soaked resin；22: shell；23: the first sides；24: the second sides；25: graphite microcrystal；26:
The carbon fibre initial rinse bed of material；27: foamed core；28: serving.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
According to one embodiment of the disclosure, a kind of sounding device is provided.As shown in Figure 1, the sounding device includes magnetic
Road system 19 and vibrational system.Magnetic circuit system 19 is configurable for forming magnetic field.For example, magnetic circuit system 19 includes permanent magnet.
Permanent magnet forms magnetic field in magnetic gap 18.Magnetic circuit system 19 is the common knowledge of this field, is not elaborated herein.
Vibrational system includes voice coil 16, vibrating diaphragm 11 and strengthening course 15.One end of voice coil 16 is connect with the central part of vibrating diaphragm 11,
The other end is located in magnetic field.Strengthening course 15 is arranged on central part.Strengthening course 15 includes the carbon fibre initial rinse bed of material 26.Carbon fiber is pre-
The angle of orientation for soaking the carbon fiber 20 in the bed of material 26 is less than or equal to 30 °.Carbon fiber is piled up and is taken by countless graphite microcrystals 25
To forming.As illustrated in figures 4-5, the angle of orientation is the angle of graphite microcrystal 25 and fiber axis, in Fig. 5It is shown.Graphite microcrystal 25
Structure in the form of sheets.The outrigger shaft of the main direction of fiber axis, that is, carbon fiber 20, as shown in A arrow in Fig. 4-5.
The elasticity modulus of carbon fiber 20 is calculated with following equation:
As shown in figure 4, when graphite microcrystal 25 is parallel with fiber axis, the angle of orientationIt is 0, at this point, elasticity modulus are as follows:
As shown in figure 5, when graphite microcrystal 25 and fiber axis are not parallel, the angle of orientationIt is not 0, at this point, elasticity modulus are as follows:
Its
In, Fz is axial tension, and Sz is projected area of the graphite microcrystal in fiber axial direction, εzIt is graphite microcrystal in fiber axial direction
Strain,For the angle of graphite microcrystal lamella and fiber axial direction, Lc are as follows: graphite microcrystal 25 piles up thickness, LaⅡTo be parallel to fibre
Tie up the base width of the graphite microcrystal 25 of axis, E0For the theoretical modulus in graphite microcrystal lamella direction, E1 is the drawing of graphite flake layer normal direction
Stretch modulus, La⊥For the base width of the graphite microcrystal 25 perpendicular to fiber axis.
Form factor is the ratio between the base width for piling up thickness Yu graphite microcrystal 25 of graphite microcrystal 25, i.e.,Work as shape
One timing of the factor, elasticity modulus reduce with the increase of the angle of orientation.
When the angle of orientation≤30 °, the elasticity modulus of carbon fiber 20 is larger, and the rigidity of the carbon fibre initial rinse bed of material 26 is big, for
The acoustical behavior improvement of the high frequency of sounding device is good.
In addition, in the long-term use, the good rigidity of still holding of strengthening course 15.The reliability of sounding device is good
It is good.
When 30 ° of angle of orientation >, the elasticity modulus loss of carbon fiber 20 is larger.The elasticity modulus of carbon fiber 20 is relatively
It is small, it is smaller to the high-frequency acoustic performance boost of sounding device.The reliability of sounding device reduces.
When one timing of the angle of orientation, elasticity modulus reduces with the increase of form factor.Preferably, the shape of carbon fiber 20
When the factor is 0.1-1.5, the elasticity modulus and tensile strength of carbon fiber 20 are bigger than the carbon fiber 20 except the range.Carbon fiber is pre-
The rigidity for soaking the bed of material 26 is big.
In one example, vibrating diaphragm 11 includes centrally located central part, positioned at the edge part 13 at edge and positioned at center
Ring portion 14 between portion and edge part 13.Being also possible to vibrating diaphragm 11 is planar structure.Annular is provided on magnetic circuit system 19
Shell 22.Edge part 13 is by gluing knot on shell 22.During strengthening course 15 is bonded in by binder or double-sided adhesive
Center portion.Strengthening course 15 and voice coil 16 are located at the upper and lower side of vibrating diaphragm 11.
For example, vibrating diaphragm 11 is to be combined by one of engineering plastics, elastomeric material, glue film etc. or multiple material.
For example, engineering plastics include PEEK, PAR etc..Elastomeric material includes TPU, TPEE, silicon rubber etc..Glue film includes acrylate
Class glue film, organic silicon glue film etc..
For example, vibrating diaphragm 11 with a thickness of 0.01mm-0.5mm.The elasticity of vibrating diaphragm 11 within the scope of this is good, and intensity is high.
In one example, centring disk 17 is provided between voice coil 16 and vibrating diaphragm 11.Voice coil 16 passes through centring disk
17 are connected with external equipment.Centring disk 17 can be effectively prevented vibrational system and polarize.
In one example, the nitrogen content of the carbon fiber 20 in the carbon fibre initial rinse bed of material 26 is less than or equal to 6%.Carbon fiber
20 nitrogen content is lower, then phosphorus content is higher.The proportion in carbon fiber 20 is fewer as hetero atom for nitrogen-atoms, to carbon fiber
The destruction of 20 crystal phase structure is smaller, then the elasticity modulus of carbon fiber 20 is higher.
For example, polyacrylonitrile fibre, pitch fibers, viscose or phenolic fibre are handled through high temperature cabonization, to obtain carbon fiber
Dimension 20.It can reduce the nitrogen content in carbon fiber 20 by carbonization treatment, improve phosphorus content, so that graphite microcrystal orientation increases
By force.
Further, the phosphorus content of carbon fiber 20 is greater than or equal to 94% in the carbon fibre initial rinse bed of material 26.Phosphorus content is higher
Foreign atom then in carbon fiber 20 is fewer, and elasticity modulus is higher.Strengthening course 15 within the scope of this has the characteristics that rigidity is high.
In one example, the carbon fiber 20 in the carbon fibre initial rinse bed of material 26 is single layer or multilayer.It is located on the same floor
Carbon fiber 20 is unidirectional and is set side by side.
For example, as Figure 2-3, more carbon fibers 20 are arranged in one layer in parallel to each other.Then, pre-soaked resin 21 is adopted
It is coated on carbon fiber 20 with the mode of film, to form carbon fiber prepreg.After hardening, carbon fiber prepreg forms single layer
The carbon fibre initial rinse bed of material 26.For example, being solidified by the way of hot pressing.Pre-soaked resin 21 can be, but not limited to, asphalt mixtures modified by epoxy resin
Rouge, phenolic resin, bimaleimide resin, polyimide resin, vinylite etc..
For example, the folded setting of the carbon fibre initial rinse bed of material 26 of above-mentioned single layer, to form the prepreg of multilayer.The prepreg of multilayer
The carbon fibre initial rinse bed of material 26 of multilayer is formed after hardening.Carbon fiber 20 in every layer arranges in same direction.
Single layer or the carbon fibre initial rinse bed of material 26 of multilayer all have elasticity modulus height, and the tensile strength along direction initialization is high
The characteristics of.
In addition, when surface layer of the carbon fibre initial rinse bed of material 26 as strengthening course, the unidirectional, carbon fiber that is set side by side is on surface layer
Form groove structure.In vibration, groove structure can effectively comb air-flow, this reduces the noise ingredient of air-flow, sounding
The sound purity of device improves.
In one example, the temperature of the carbonization treatment of carbon fiber 20 is 1700 DEG C or more.At such a temperature, graphite microcrystal
25 orientation shape is more preferable, and the angle of orientation is within 30 °, or even close to 0 °.The arrangement of graphite microcrystal 25 is more regular.The bullet of carbon fiber 20
Property modulus and tensile strength are apparently higher than the carbon fiber 20 obtained lower than the carbonization treatment temperature.
In addition, the filametntary diameter of carbon fiber 20 is small in temperature range.For example, diameter can reach 7 μm or less.
The diameter of carbon fiber 20 is smaller, then tensile strength and elasticity modulus are higher.Carbon fiber 20 in the diameter range is able to satisfy sounding
Demand of the device for the rigidity of strengthening course 15.
In addition, this enables the carbon fibre initial rinse bed of material 26 of same thickness to have the carbon fiber 20 of more layers, this makes
The rigidity of the carbon fibre initial rinse bed of material 26 further increases.
In sounding device, usually obtaining improving along the rigidity of direction initialization can make sounding device have good high frequency
Performance.In this example embodiment, carbon fiber 20 extends along direction initialization, has high tensile strength in the direction initialization carbon fiber 20,
So that the carbon fibre initial rinse bed of material 26 is larger in the rigidity of the direction initialization, the high frequency of sounding device can be improved in this way
Can, and the dosage of carbon fiber 20 can be saved.
In one example, the specific modulus of the carbon fiber 20 in the carbon fibre initial rinse bed of material 26 is greater than or equal to 163GPa
cm3/g.Specific modulus is the ratio between elasticity modulus and density of material.The elasticity modulus of the more big then material of the specific modulus it is bigger and/
Or density is smaller.Within the scope of the specific modulus, the rigidity of strengthening course 15 is high, the high frequency performance of sounding device is promoted obvious.
In one example, as shown in figure 9, strengthening course 15 is including foamed core 27 and is connected to foamed core 27
Two carbon fibre initial rinse bed of materials 26 of upper and lower surfaces.The strengthening course 15 is " sandwich " structure.Foamed core 27 has density small
The characteristics of.The high frequency performance of sounding device and the thickness of strengthening course 15 are positively correlated, i.e., improve with the increase of thickness, with thickness
Reduction and reduce.The high frequency performance of sounding device and the density of strengthening course 15 are negatively correlated, i.e., reduce with the increase of density,
It is improved with the reduction of density.Foamed core 27 can reduce the global density of strengthening course 15, improve the whole thick of strengthening course 15
Degree, so that the high frequency performance of sounding device be made to significantly improve.Preferably, strengthening course 15 with a thickness of 0.02mm-1mm.In the model
In enclosing, the rigidity of strengthening course 15 is high, and will not additionally increase the thickness of sounding device.
Further, strengthening course 15 with a thickness of 0.02mm-0.5mm.
In addition, multiple carbon fibre initial rinse bed of materials 26, so that the elasticity modulus of strengthening course 15 significantly improves.
Foamed core 27 can be, but not limited to, foamed material.The inside of foamed material has hole.For example, foaming material
Material includes PMI foamed material, PI foamed material, polyesters foamed material etc..
Preferably, foamed core 27 with a thickness of 0.05mm-1mm.In the thickness range, strengthening course 15 has good rigid
Degree, and will not additionally increase the integral thickness of sounding device.
In one example, the carbon fibre initial rinse bed of material 26 is multilayered structure.Strengthening course 15 includes the carbon fiber being combined with each other
Tie up prepreg 26 and foamed core 27.The strengthening course 15 it is more rigid, global density is smaller, can more effectively improve hair
The high-frequency effect of acoustic device.
Preferably, foamed core 27 is provided between two carbon fibre initial rinse bed of materials 26.The rigidity of this strengthening course 15
It is bigger.
The elasticity modulus of the more more then carbon fibre initial rinse bed of materials 26 of the number of plies of carbon fiber 20 is bigger, but density can also increase accordingly
Add.The number of plies within the set range when, the increased amplitude of elasticity modulus be greater than the increased amplitude of density, specific modulus with the number of plies increase
And increase；When the number of plies is more than setting value, the increased amplitude of elasticity modulus is less than the increased amplitude of density, and specific modulus increases with the number of plies
Adding can reduce instead.For example, the number of plies of the carbon fiber 20 in the carbon fibre initial rinse bed of material 26 is less than or equal to 16.In the range
Interior, the specific modulus of the carbon fibre initial rinse bed of material 26 increases with the increase of the number of plies, so as to significantly improve the high frequency of sounding device
Effect.
In one example, as shown in Figure 10, strengthening course 15 further includes be bonded respectively to the carbon fibre initial rinse bed of material 26 remote
From the serving 28 at least one surface of foamed core 27.In this example embodiment, surface layer of the serving 28 as strengthening course 15.
Serving 28 is sealing material, and gas and water cannot penetrate serving 28.The setting of serving 28 can improve benefit significantly
Airtight, the waterproofing grade of strong layer 15.
For example, serving 28 is at least one of engineering plastics, aluminium and damping material.Damping material includes: damping glue
Water, rubber etc..For example, damping glue is acrylic compounds glue.Above-mentioned material all has the characteristics of high rigidity, low-density, can show
Write the structural strength for improving strengthening course 15.
In one example, strengthening course 15 is prepared using hot pressing co-curing.For example, when strengthening course 15 only includes carbon fiber
Tie up prepreg when, the material after the completion of film is placed into hot press, setting at a temperature of carry out hot pressing.In pre-soaked resin
After 21 solidifications, strengthening course 15 is formed.
When strengthening course 15 is multilayered structure, for example, strengthening course 15 is above-mentioned " sandwich " structure or above-mentioned includes
The structure of serving 28.Firstly, each layer is stacked together according to predetermined order.Then, it is placed into hot press, is setting
At a temperature of carry out hot pressing.Pre-soaked resin 21 can form binding force with serving 28, foamed core 27 after hardening.
In other examples, the carbon fibre initial rinse bed of material 26 is clipped to form by 20 coiled material of carbon fiber with release film.Carbon
20 coiled material sheet of fiber is as the carbon fiber prepreg after solidification.Production when, according to the shape of setting by 20 coiled material of carbon fiber into
Row is cut, and removes release film, then carries out the molding of hot pressing co-curing with other materials or the multilayer carbon fibre initial rinse bed of material 26.?
Under heating condition, the pre-soaked resin 21 of carbon fiber prepreg regains viscosity, can be with other materials or other carbon fibers
Prepreg carries out compound.
In one example, strengthening course 15 is in rectangle.As Figure 2-3, strengthening course 15 includes first at 23 and second
24.First while 23 length be greater than or equal to second while 24 length.The the area of strengthening course 15 the big, more is easy to happen segmentation
Vibration, it is smaller, the size requirements of sounding device can not be adapted to.For example, the length on the first side 23 is 9.1mm-15.2mm.Second
The length on side 24 is 6.1mm-11.2mm.The diaphagras of strengthening course 15 is small in the range.
Length is longer in one direction for strengthening course 15, then in this direction, strengthening course 15 be easy to appear vibration it is unbalanced,
To make sounding device noise occur.For example, first at 23 and second 24 length ratio be 1:1-4:1.In the range, it mends
The vibration of 15 various pieces of strong layer is more balanced, and the noise of sounding device is small.
20 main direction of carbon fiber of the carbon fibre initial rinse bed of material 26 and the angle on the first side 23 are 45-90 °, such as B institute in Fig. 3
Show.The main direction of carbon fiber 20 refers to filametntary trend.In general, the vibration that vibrating diaphragm 11 and strengthening course 15 are constituted
Plate.It is big in the diaphagras perpendicular to 23 direction of the first side in high frequency, therefore mentioning perpendicular to the rigidity in 23 direction of the first side
Height has a major impact the promotion of the high frequency performance of sounding device.The strengthening course that carbon fiber 20 in the angular range is formed
15, it is larger in the rigidity perpendicular to 23 direction of the first side, it is obvious for the promotion of the high frequency performance of sounding device.
Preferably, the main direction of the carbon fiber 20 of the carbon fibre initial rinse bed of material 26 is vertical with the first side 23, as shown in Figure 3.
This setup, strengthening course 15 is higher in the tensile strength of the direction, and the high frequency performance of sounding device is excellent.
Embodiment 1:
In this example embodiment, the performance of the carbon fiber 20 of the different-diameter of same material is tested.Carbon fiber 20 uses
Polyacrylonitrile-based carbon fibre or asphalt base carbon fiber.See Table 1 for details.
| Precursor diameter/μm | 20 diameter of carbon fiber/μm | Tensile strength/GPa | Elasticity modulus/GPa |
| 6 | 3.1 | 5.89 | 286 |
| 7 | 3.6 | 5.45 | 281 |
| 8 | 5.0 | 4.46 | 274 |
| 11 | 7.0 | 3.79 | 259 |
| 13 | 8.5 | 3.46 | 251 |
The relationship of table 1- precursor diameter, 20 diameter of carbon fiber and 20 mechanical property of carbon fiber
Seen from table 1, with the reduction of 20 diameter of carbon fiber, the tensile strength and elasticity modulus of carbon fiber 20 gradually increase
Add.When 20 diameter of carbon fiber is 7.0 μm or less, the tensile strength and elasticity modulus of carbon fiber 20 are larger, respectively reach
3.79GPa and 259GPa or more.The rigidity of the 15 carbon fibre initial rinse bed of material 26 of strengthening course within the scope of this is big, for sounding device
High frequency performance is promoted obvious.
Embodiment 2:
In this example embodiment, the different trades mark, different-diameter the diameter of carbon fiber 20 be compared with mechanical property.It is detailed in table
2。
| The trade mark | Diameter | Tensile strength | Elasticity modulus |
| T-300 | 7.0 | 3.53 | 230 |
| T-800H | 5.2 | 5.59 | 294 |
| T-1000 | 5.3 | 7.06 | 294 |
| LM-400 | 6.4 | 4.51 | 294 |
| LM-500 | 5.0 | 5.10 | 300 |
| LM-600 | 5.0 | 5.79 | 285 |
| MR50P | 5.0 | 5.49 | 294 |
| MR60P | 5.0 | 6.17 | 294 |
| MRE60P | 5.0 | 6.17 | 323 |
The main mechanical properties of the carbon fiber 20 of the table 2- difference trade mark
As can be seen from Table 2, the diameter of above-mentioned various carbon fibers 20 within 7.0 μm, all have high tensile strength and
Elasticity modulus, this significantly improves the rigidity of strengthening course 15.
Embodiment 3:
The sounding device of the embodiment of the present invention is compared with the acoustical behavior of existing sounding device.Wherein, two sounding dresses
The power set is identical.The strengthening course 15 of the sounding device of the embodiment of the present invention is the unidirectional carbon fibre initial rinse bed of material+PMI foam core
Layer+unidirectional carbon fibre initial rinse bed of material structure.One layer of carbon fiber is arranged in the unidirectional carbon fibre initial rinse bed of material.The diameter of carbon fiber
It is 4-5 μm, arragement direction is identical；The material of the strengthening course 15 of existing sounding device is aluminium foil+glue film+PMI foamed core+glue
Film+aluminium foil.The size of two kinds of strengthening courses 15 is identical, and the length of sounding device is 18mm, width 13mm.The length of strengthening course 15
For 14mm, width 9mm.
Fig. 6 is the sounding device of the embodiment of the present disclosure and the sound pressure level comparison diagram of existing sounding device.Wherein, abscissa is
Frequency, ordinate are sound pressure level.
Fig. 7 is the sounding device of the embodiment of the present disclosure and the THD comparison diagram of existing sounding device.Wherein, abscissa is frequency
Rate, ordinate THD.
Fig. 8 is the sounding device of the embodiment of the present disclosure and the R&B comparison diagram of existing sounding device.Wherein, abscissa is frequency
Rate, ordinate R&B.
In Fig. 6, dotted line c1 represents the test curve of the sounding device of the embodiment of the present invention；Solid line c2 is existing sounding
The test curve of device.As seen from Figure 6, in high band, such as when frequency 6000Hz or more, c1 curve be respectively positioned on c2 curve it
On.This shows that the sounding device of the embodiment of the present invention has more excellent high frequency performance.
In Fig. 7, dotted line d1 represents the test curve of the sounding device of the embodiment of the present invention；Solid line d2 is existing sounding
The test curve of device.As seen from Figure 7, sound pressure level obviously increases when existing sounding device is near 6000Hz, point occurs
Peak.And the sounding device of the embodiment of the present invention near 6000Hz when sound pressure level relative to existing sounding device reduce it is bright
Aobvious, there is not spike near 6000Hz in d1 curve.This is because the strengthening course 15 of the embodiment of the present invention has high rigidity,
The vibration that can guarantee each section equilibrium of strengthening course 15 when near the frequency, restrained effectively diaphagras, so that noise
Ingredient is small.And existing sounding device is by the insufficient rigidity of strengthening course 15, it is unbalanced to occur vibration when near the frequency, miscellaneous
Sound ingredient is big, to form spike.
Therefore, sounding device of the invention has more excellent hearing effect, especially in high band.
In addition, in other examples, due to the rigidity height of strengthening course 15, this makes the sounding device of the embodiment of the present invention
The spike of high frequency in THD curve significantly moves right, i.e., mobile to high frequency direction, so that listening in audio frequency range not
It will appear spike, so that the high frequency performance of sounding device is improved.
In fig. 8, dotted line e1 represents the test curve of the sounding device of the embodiment of the present invention；Solid line e2 is existing sounding
The test curve of device.The strengthening course 15 of sounding device of the invention be the unidirectional carbon fibre initial rinse bed of material+PMI foamed core+
The structure of the unidirectional carbon fibre initial rinse bed of material.One layer of carbon fiber is arranged in the unidirectional carbon fibre initial rinse bed of material.The diameter of carbon fiber is
4-5 μm, arragement direction is identical.Wherein, surface layer close to speak side of the carbon fibre initial rinse bed of material 26 as strengthening course 15.Carbon fiber
20 be in unidirectional array.The main direction of carbon fiber 20 is vertical with the first side 23.Surface layer forms uniform groove structure.Existing hair
The strengthening course 15 of acoustic device is aluminium foil+glue film+PMI foamed core+glue film+aluminium foil, and the surface layer of strengthening course 15 is planar structure.
As seen from Figure 8, the R&B curve e1 of the sounding device of the embodiment of the present invention fo (for example, 800Hz) nearby when it is obvious
Lower than the R&B curve e2 of existing sounding device.The audition purity of the sounding device of the embodiment of the present invention is higher, and noise ingredient is more
It is small.This is because the surface of the strengthening course 15 of the embodiment of the present invention forms equally distributed groove structure, combing is played to air-flow
Effect.In vibration, compared to the strengthening course 15 of planar structure, groove structure makes the noise ingredient of air-flow smaller.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of sounding device, wherein include:
Magnetic circuit system, the magnetic circuit system are configurable for forming magnetic field；And
Vibrational system, the vibrational system include voice coil, vibrating diaphragm and strengthening course, the center of one end of the voice coil and the vibrating diaphragm
Portion's connection, the other end are located in the magnetic field, and the strengthening course is arranged on the central part, and the strengthening course includes carbon fiber
The graphite microcrystal angle of orientation of prepreg, the carbon fiber in the carbon fibre initial rinse bed of material is less than or equal to 30 °, the angle of orientation
For the angle of graphite microcrystal and fiber axis.
2. sounding device according to claim 1, wherein the form factor of the carbon fiber in the carbon fibre initial rinse bed of material
For 0.1-1.5, the form factor is the ratio between the base width for piling up thickness and graphite microcrystal of graphite microcrystal.
3. sounding device according to claim 1, wherein the nitrogen content of the carbon fiber in the carbon fibre initial rinse bed of material is small
In or equal to 6%.
4. sounding device according to claim 1, wherein carbon fiber in the carbon fibre initial rinse bed of material be single layer or
Multilayer, the carbon fiber being located on the same floor are unidirectional and are set side by side.
5. sounding device according to claim 4, wherein the strengthening course includes foamed core and is connected to the bubble
The carbon fibre initial rinse bed of material of two of the upper and lower surfaces of foam sandwich layer.
6. sounding device according to claim 5, wherein further include be bonded respectively to the carbon fibre initial rinse bed of material remote
From the serving at least one surface of the foamed core, the serving is sealing material.
7. sounding device according to claim 6, wherein the serving is in engineering plastics, aluminium and damping material
It is at least one.
8. sounding device described in any one in -7 according to claim 1, wherein the strengthening course uses hot pressing co-curing
It is prepared.
9. sounding device described in any one in -7 according to claim 1, wherein the strengthening course is in rectangle, the benefit
Strong layer include first while and when second, described first while length be greater than or equal to described second while length, the carbon fiber
The carbon fiber main direction of prepreg and the angle on first side are 45-90 °.
10. sounding device described in any one in -7 according to claim 1, wherein the strengthening course with a thickness of 0.02-
0.5 millimeter.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457260.6A CN109672965B (en) | 2018-11-30 | 2018-11-30 | Sound production device |
| PCT/CN2018/124936 WO2020107617A1 (en) | 2018-11-30 | 2018-12-28 | Sound generating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457260.6A CN109672965B (en) | 2018-11-30 | 2018-11-30 | Sound production device |
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| Publication Number | Publication Date |
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| CN109672965A true CN109672965A (en) | 2019-04-23 |
| CN109672965B CN109672965B (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811457260.6A Active CN109672965B (en) | 2018-11-30 | 2018-11-30 | Sound production device |
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| Country | Link |
|---|---|
| CN (1) | CN109672965B (en) |
| WO (1) | WO2020107617A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110958544A (en) * | 2019-11-11 | 2020-04-03 | 歌尔股份有限公司 | Composite vibrating diaphragm for sound production device and sound production device |
| WO2020107618A1 (en) * | 2018-11-30 | 2020-06-04 | 歌尔股份有限公司 | Sound producing device |
| WO2021022948A1 (en) * | 2019-08-02 | 2021-02-11 | 歌尔股份有限公司 | Vibrating plate and sounding device |
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| CN110958544A (en) * | 2019-11-11 | 2020-04-03 | 歌尔股份有限公司 | Composite vibrating diaphragm for sound production device and sound production device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020107617A1 (en) | 2020-06-04 |
| CN109672965B (en) | 2021-03-09 |
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