Broussonetia papyrifera fiber earphone diaphragm preparation method, Broussonetia papyrifera fiber diaphragm and earphone

Abstract

A paper mulberry fiber earphone diaphragm comprises a dome, a dangling edge and a positioning ring. The spherical top is designed into an arch spherical surface, an annular first bonding edge is integrally arranged on the outer side of the spherical top, the dangling edge is designed into an arch annular shape, an annular second bonding edge and an annular third bonding edge are integrally arranged on the inner side and the outer side of the dangling edge respectively, the first bonding edge and the second bonding edge are spliced and bonded up and down, and the positioning ring is designed into an annular shape. The positioning ring and the third bonding edge are spliced and bonded up and down; the dome is made of paper mulberry fibers. In addition, the invention also provides a preparation method of the paper mulberry fiber earphone diaphragm and an earphone with the paper mulberry fiber earphone diaphragm. According to the invention, the special paper mulberry fibers are adopted to form the spherical top of the vibrating diaphragm, so that the acoustic performance of the vibrating diaphragm can be improved; broussonetia papyrifera fibers are processed through screening, impurity removal, pulping, stirring and the like and then are coated and formed, so that the formed vibrating diaphragm ball top is more uniform and consistent in fiber composition; the method is high in practicability and has high popularization significance.

Description

Technical Field

[0001] The present invention relates to the field of diaphragm technology, and in particular to a method for preparing a diaphragm of a paper mulberry fiber earphone, a paper mulberry fiber diaphragm, and an earphone. Background Art

[0002] The headphone diaphragm is a key component of the headphone. Its material and structure have a direct impact on the sound quality. Traditional headphone diaphragms are usually made of plastic, metal, or composite materials. However, these materials have some limitations in terms of sound quality, weight, and environmental protection. Therefore, it is urgent to find a lightweight, high-strength, and environmentally friendly alternative material. Summary of the invention

[0003] Based on this, it is necessary to provide a paper mulberry fiber headphone diaphragm to address the shortcomings of the prior art.

[0004] A paper mulberry fiber earphone diaphragm, comprising a dome, a hanging edge and a positioning ring. The dome is designed as an arched spherical surface, and an annular first bonding edge is integrally provided on the outer side thereof; the hanging edge is designed as an arched ring, and an annular second bonding edge and a third bonding edge are integrally provided on the inner and outer sides thereof, respectively; the first bonding edge and the second bonding edge are spliced ​​and bonded up and down; the positioning ring is designed as an annular design, and the positioning ring and the third bonding edge are spliced ​​and bonded up and down. The material of the dome comprises paper mulberry fiber.

[0005] Furthermore, the material of the dome is a composite material, which includes a bottom substrate layer and a paper mulberry fiber layer coated on the upper surface of the substrate layer.

[0006] Furthermore, the material of the dome is a composite material, which includes a plurality of base material layers and paper mulberry fiber layers stacked and bonded together.

[0007] Furthermore, the material of the dome is a single material, which includes a plurality of paper mulberry fiber layers stacked and bonded together.

[0008] In addition, the present invention also provides a method for preparing the paper mulberry fiber earphone diaphragm.

[0009] A method for preparing a paper mulberry fiber earphone diaphragm, which is used to make a paper mulberry fiber earphone diaphragm, and the paper mulberry fiber earphone diaphragm includes a dome, a hanging edge, and a positioning ring. The dome is designed as an arched spherical surface, and an annular first bonding edge is integrally provided on its outer side. The hanging edge is designed as an arched ring, and an annular second bonding edge and a third bonding edge are integrally provided on its inner and outer sides respectively. The first bonding edge and the second bonding edge are spliced ​​and bonded up and down. The positioning ring is designed as an annular design, and the positioning ring and the third bonding edge are spliced ​​and bonded up and down. The material of the dome includes paper mulberry fiber. The method for preparing the paper mulberry fiber earphone diaphragm includes the following steps:

[0010] Step 1: Pretreatment: select paper mulberry bark as raw material, soak it in clean water, then take it out and put it into a large pot for steaming. Add an appropriate amount of alkali during the steaming process to make the processed paper mulberry fiber softer. The whole fiberization process takes 4 to 5 hours;

[0011] Step 2: Preliminary impurity removal: soak the cooked paper mulberry fiber in water again to rinse it, perform preliminary impurity removal treatment, and then use a wooden mallet to repeatedly hammer the rinsed paper mulberry fiber into a thin pulp to make the paper mulberry fiber softer and finer;

[0012] Step 3: Screening: tear the pounded paper mulberry fibers into pieces and use screening tools to screen out paper mulberry fibers with a diameter of 5μm to 20μm. By controlling the fiber diameter, the density and elastic modulus of the diaphragm can be adjusted to optimize the sound quality performance;

[0013] Step 4: Secondary impurity removal, using centrifugal soaking method to remove lignin and other impurities in the fiber, retaining high-purity paper mulberry fiber;

[0014] Step 5: beating, beating the treated paper mulberry fibers to convert the paper mulberry fibers into fiber pulp;

[0015] Step 6: Stirring: Use a high-speed stirrer to homogenize the slurry to ensure that the fibers in the slurry are evenly distributed;

[0016] Step 7: Coating, evenly coating the slurry on the mold or substrate to form a preliminary diaphragm material structure;

[0017] Step 8: Drying: the diaphragm material structure after coating is baked at a temperature of 70°C to 120°C to remove excess water. The drying time is 10 to 30 minutes.

[0018] Step 9: hot pressing and shaping. The dried diaphragm material structure is shaped by hot pressing. The shaping temperature is 80℃~150℃ and the shaping time is 5~15 minutes. The diaphragm material structure after hot pressing is naturally cooled and shaped into a dome structure.

[0019] Step 10: Assemble the diaphragm, and bond the shaped dome to the suspension edge and the positioning ring to finally form the paper mulberry fiber earphone diaphragm;

[0020] Step 11: Testing: Conduct structural strength tests such as stretching on the finished paper mulberry fiber earphone diaphragm as well as acoustic performance tests such as sound pressure and frequency response. Compare the test data with conventional diaphragms to ensure the performance and strength of the paper mulberry fiber earphone diaphragm.

[0021] Furthermore, the material of the dome is a composite material, which includes a bottom substrate layer and a paper mulberry fiber layer coated on the upper surface of the substrate layer.

[0022] Furthermore, the material of the dome is a composite material, which includes a plurality of base material layers and paper mulberry fiber layers stacked and bonded together.

[0023] Furthermore, the material of the dome is a single material, which includes a plurality of paper mulberry fiber layers stacked and bonded together.

[0024] Furthermore, in step 4, a centrifuge is used to remove lignin and other impurities in the fiber, and the rotation speed of the centrifuge is set to 150 rpm.

[0025] Furthermore, in the step 5, a pulping machine is used to pulp the paper mulberry fibers, and the fiber pulp viscosity after pulping is 5 mPa·s, and the fiber pulp concentration is 3% to 5%.

[0026] Furthermore, in step 6, the speed of the high-speed stirrer is set to 700 rpm, the stirring time is 30 min, and the solid content of the fiber slurry after stirring is not less than 1.2 g / cm 3 .

[0027] Furthermore, in the step 7, a three-axis coating device is used to perform reciprocating coating processing, and the coating thickness is 10 μm to 105 μm.

[0028] In addition, the present invention also provides an earphone with a paper mulberry fiber earphone diaphragm.

[0029] A headphone with a paper mulberry fiber headphone diaphragm, comprising a paper mulberry fiber headphone diaphragm. The paper mulberry fiber headphone diaphragm comprises a dome, a hanging edge and a positioning ring. The dome is designed as an arched spherical surface, and a first annular bonding edge is integrally provided on the outer side thereof. The hanging edge is designed as an arched ring, and a second annular bonding edge and a third annular bonding edge are integrally provided on the inner and outer sides thereof, respectively. The first bonding edge and the second bonding edge are spliced ​​and bonded up and down. The positioning ring is designed as an annular design, and the positioning ring and the third bonding edge are spliced ​​and bonded up and down. The material of the dome comprises paper mulberry fiber.

[0030] Furthermore, the material of the dome is a composite material, which includes a bottom substrate layer and a paper mulberry fiber layer coated on the upper surface of the substrate layer.

[0031] Furthermore, the material of the dome is a composite material, which includes a plurality of base material layers and paper mulberry fiber layers stacked and bonded together.

[0032] Furthermore, the material of the dome is a single material, which includes a plurality of paper mulberry fiber layers stacked and bonded together.

[0033] In summary, the beneficial effects of the paper mulberry fiber earphone diaphragm preparation method, paper mulberry fiber diaphragm and earphone of the present invention are:

[0034] 1. Direct radiation of sound. The dome is the part of the diaphragm that directly radiates sound, especially the sound in the mid-high frequency band. It determines the frequency response, clarity and fineness of the sound quality of the headphones. By using special paper mulberry fiber to form the diaphragm dome, it has a better mid-high frequency response, improves the clarity and layering of the sound quality, and can greatly improve the acoustic performance of the diaphragm;

[0035] Second, vibration mode control. The design of the dome affects the vibration mode of the entire diaphragm. An ideal dome design can reduce split vibration, ensure more accurate sound transmission, and reduce distortion. The paper mulberry fiber diaphragm has a higher internal damping ratio (internal damping ratio is 0.05-0.10), which can provide more delicate sound quality performance in acoustic applications than the traditional polymer material diaphragm (internal damping ratio is 0.01-0.03);

[0036] 3. Phase consistency. A well-designed dome can ensure the phase consistency of sound waves, thereby reducing the interference of sound waves and improving the stereoscopic sense and sound field performance of the sound. The frequency response curve of the paper mulberry fiber diaphragm in the mid-high frequency range is smoother, and it can provide better sound quality performance compared to traditional materials.

[0037] Fourth, the balance between rigidity and quality. The dome is usually made of high-rigidity materials, which can improve the responsiveness of the diaphragm in the high-frequency band while keeping it light enough to avoid affecting the performance of the low frequency. The density of the paper mulberry fiber diaphragm is 20% to 30% lower than that of the traditional polymer material diaphragm, which can significantly reduce the weight of the headphones. The diaphragm has excellent fatigue resistance and durability under long-term use.

[0038] 5. Environmental protection: Paper mulberry fiber comes from natural plants, is renewable and non-toxic. The production and processing of paper mulberry fiber is more in line with modern environmental protection trends than polymer composite materials and metal materials.

[0039] The paper mulberry fibers constituting the dome of the diaphragm are processed through screening, impurity removal, pulping, stirring and other processes before being coated and formed, so that the fiber composition of the formed diaphragm dome is more uniform and consistent, thereby achieving more accurate sound transmission and more delicate sound quality performance; and compared with traditional polymer materials or metal materials, the processing cost of paper mulberry fibers is lower, and it is suitable for large-scale production; the present invention has strong practicability and great promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the cross-sectional structure of a paper mulberry fiber earphone diaphragm in the present invention;

[0041] Figure 2 A comparison of the sound pressure test curves of a paper mulberry fiber earphone diaphragm of the present invention and a conventional diaphragm;

[0042] Figure 3The figure is a comparison curve of the tensile test between the paper mulberry fiber earphone diaphragm in the present invention and the conventional diaphragm. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the invention more clearly understood, the invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and are not used to limit the invention.

[0044] like Figures 1 to 3 As shown, the present invention provides a method for preparing a paper mulberry fiber earphone diaphragm 100, which is used to make a paper mulberry fiber earphone diaphragm 100, and the paper mulberry fiber earphone diaphragm 100 includes a dome 10, a hanging edge 20 and a positioning ring 30. The dome 10 is designed as an arched spherical surface, and an annular first bonding edge 11 is integrally provided on the outer side thereof, the hanging edge 20 is designed as an arched ring, and an annular second bonding edge 21 and a third bonding edge 22 are integrally provided on the inner and outer sides thereof, respectively, the first bonding edge 11 and the second bonding edge 21 are spliced ​​and bonded up and down, and the positioning ring 30 is designed as an annular design, and the positioning ring 30 and the third bonding edge 22 are spliced ​​and bonded up and down.

[0045] The material of the dome 10 includes paper mulberry fiber. Specifically, in the present embodiment, the material of the dome 10 is a composite material, which includes a bottom substrate layer 12 and a paper mulberry fiber layer 13 coated on the upper surface of the substrate layer 12. It can be understood that in other embodiments, the material of the dome 10 can also be a composite material, which includes a plurality of substrate layers 12 and paper mulberry fiber layers 13 stacked and bonded together; or the material of the dome 10 can also be a single material, which includes a plurality of paper mulberry fiber layers 13 stacked and bonded together; all of which are within the protection scope of the present invention.

[0046] The method for preparing the paper mulberry fiber earphone diaphragm 100 comprises the following steps:

[0047] Step 1: Pretreatment: select paper mulberry bark as raw material, soak it in clean water, then take it out and put it into a large pot for steaming. Add an appropriate amount of alkali during the steaming process to make the processed paper mulberry fiber softer. The whole fiberization process takes 4 to 5 hours;

[0048] Step 2: Preliminary impurity removal: soak the cooked paper mulberry fiber in water again to rinse it, perform preliminary impurity removal treatment, and then use a wooden mallet to repeatedly hammer the rinsed paper mulberry fiber into a thin pulp to make the paper mulberry fiber softer and finer;

[0049] Step 3: Screening: tear the pounded paper mulberry fibers into pieces and use screening tools to screen out paper mulberry fibers with a diameter of 5μm to 20μm. By controlling the fiber diameter, the density and elastic modulus of the diaphragm can be adjusted to optimize the sound quality performance;

[0050] Step 4: Secondary impurity removal, using a centrifuge to remove lignin and other impurities in the fiber using a centrifugal soaking method to retain high-purity paper mulberry fiber, the speed of the centrifuge is set to 150 rpm;

[0051] Step 5: beating, using a beating machine to beat the treated paper mulberry fiber to convert the paper mulberry fiber into fiber pulp, the fiber pulp viscosity after beating is 5mPa·s, and the fiber pulp concentration is 3% to 5%;

[0052] Step 6: Stirring: Use a high-speed stirrer to homogenize the slurry to ensure that the fibers in the slurry are evenly distributed. The speed of the high-speed stirrer is set to 700 rpm and the stirring time is 30 minutes. The solid content of the fiber slurry after stirring is not less than 1.2 g / cm 3 ;

[0053] Step 7: coating, using a three-axis coating device for reciprocating coating processing, evenly coating the slurry on the mold or substrate, thereby forming a preliminary diaphragm material structure, the coating thickness is 10μm to 105μm;

[0054] Step 8: Drying: the diaphragm material structure after coating is baked at a temperature of 70°C to 120°C to remove excess water. The drying time is 10 to 30 minutes.

[0055] Step 9: hot pressing and shaping, the dried diaphragm material structure is shaped by hot pressing, the shaping temperature is 80°C to 150°C, the shaping time is 5 to 15 minutes, and the diaphragm material structure after hot pressing is naturally cooled and shaped into a dome 10 structure; in other embodiments, several layers of diaphragm material structure can be laminated up and down according to the required thickness, and then pressed into shape; the diaphragm material structure can also be laminated up and down with other diaphragm materials, and then pressed into shape;

[0056] Step 10: assembling the diaphragm, bonding and assembling the shaped dome 10 with the suspension edge 20 and the positioning ring 30, and finally forming the paper mulberry fiber earphone diaphragm 100;

[0057] Step 11: Testing: Conduct structural strength tests such as stretching and acoustic performance tests such as sound pressure and frequency response on the finished paper mulberry fiber earphone diaphragm 100, and compare the test data with conventional diaphragms to ensure the performance and strength of the paper mulberry fiber earphone diaphragm 100.

[0058] Comparing paper mulberry fiber with other paper fibers (such as Figure 2), from the sound pressure curve, the performance of paper mulberry fiber is more stable. Due to the ultra-thin and lightweight characteristics of the material, the product performs well in low frequencies, with fast sound propagation and low latency to ensure that the diaphragm can quickly respond to electrical signals, reduce audio delays and improve the accuracy of sound reproduction.

[0059] Comparison of material tensile tests under the same conditions (such as Figure 3 ), from the results, compared with other paper fibers, paper mulberry fiber has better consistency, good elasticity, high strength and light weight.

[0060] In summary, the beneficial effects of the paper mulberry fiber earphone diaphragm 100 preparation method, paper mulberry fiber diaphragm, and earphone of the present invention are:

[0061] 1. Direct radiation of sound. The dome 10 is the part of the diaphragm that directly radiates sound, especially the sound in the mid-high frequency band. It determines the frequency response, clarity and fineness of the sound quality of the headphones. By using special paper mulberry fiber to form the diaphragm dome 10, it has a good mid-high frequency response, improves the clarity and layering of the sound quality, and can greatly improve the acoustic performance of the diaphragm;

[0062] Second, vibration mode control. The design of the dome 10 affects the vibration mode of the entire diaphragm. An ideal dome 10 design can reduce split vibration, ensure more accurate sound transmission, and reduce distortion. The paper mulberry fiber diaphragm has a higher internal damping ratio (internal damping ratio is 0.05-0.10), which can provide more delicate sound quality performance in acoustic applications than the traditional polymer material diaphragm (internal damping ratio is 0.01-0.03);

[0063] 3. Phase consistency. A well-designed dome 10 can ensure the phase consistency of sound waves, thereby reducing the interference of sound waves and improving the stereoscopic sense and sound field performance of the sound. The frequency response curve of the paper mulberry fiber diaphragm in the mid-high frequency range is smoother, and can provide better sound quality performance compared to traditional materials.

[0064] Fourth, the balance between rigidity and quality. The dome 10 is usually made of high-rigidity materials, which can improve the responsiveness of the diaphragm in the high-frequency band while maintaining a sufficiently light weight to avoid affecting the performance of the low frequency. The density of the paper mulberry fiber diaphragm is 20% to 30% lower than that of the traditional polymer material diaphragm, which can significantly reduce the weight of the earphones. The diaphragm has excellent fatigue resistance and durability under long-term use.

[0065] 5. Environmental protection: Paper mulberry fiber comes from natural plants, is renewable and non-toxic. The production and processing of paper mulberry fiber is more in line with modern environmental protection trends than polymer composite materials and metal materials.

[0066] The paper mulberry fibers constituting the diaphragm dome 10 are processed through screening, impurity removal, pulping, stirring and other processes before being coated and formed, so that the fiber composition of the formed diaphragm dome 10 is more uniform and consistent, thereby achieving more accurate sound transmission and more delicate sound quality performance; and compared with traditional polymer materials or metal materials, the processing cost of paper mulberry fibers is lower, and it is suitable for large-scale production; the present invention is highly practical and has a strong promotion significance.

[0067] The above-mentioned embodiment only expresses one implementation method of the invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the inventive concept, which all belong to the protection scope of the invention. Therefore, the protection scope of the invention patent shall be based on the attached claims.

Claims

1. A paper mulberry fiber earphone diaphragm, characterized in that: It includes a dome, a hanging edge and a positioning ring; the dome is designed as an arched spherical surface, and a first annular bonding edge is integrally provided on its outer side; the hanging edge is designed as an arched ring, and a second annular bonding edge and a third bonding edge are integrally provided on its inner and outer sides respectively; the first bonding edge and the second bonding edge are spliced ​​and bonded together up and down; the positioning ring is designed as an annular design, and the positioning ring and the third bonding edge are spliced ​​and bonded together up and down; the material of the dome includes paper mulberry fiber.

2. The paper mulberry fiber earphone diaphragm according to claim 1, characterized in that: The material of the ball top is a composite material, which includes a bottom substrate layer and a paper mulberry fiber layer coated on the upper surface of the substrate layer.

3. The paper mulberry fiber earphone diaphragm according to claim 1, characterized in that: The material of the dome is a composite material, which includes a plurality of base material layers and paper mulberry fiber layers stacked and bonded together.

4. The paper mulberry fiber earphone diaphragm according to claim 1, characterized in that: The material of the dome is a single material, which includes a plurality of paper mulberry fiber layers stacked and bonded together.

5. A method for preparing a paper mulberry fiber earphone diaphragm, characterized in that: Used to make the paper mulberry fiber earphone diaphragm as claimed in any one of claims 1 to 4; the preparation method of the paper mulberry fiber earphone diaphragm comprises the following steps: Step 1: Pretreatment: select paper mulberry bark as raw material, soak it in clean water, then take it out and put it into a large pot for steaming. Add an appropriate amount of alkali during the steaming process to make the processed paper mulberry fiber softer. The whole fiberization process takes 4 to 5 hours; Step 2: Preliminary impurity removal: soak the cooked paper mulberry fiber in water again to rinse it, perform preliminary impurity removal treatment, and then use a wooden mallet to repeatedly hammer the rinsed paper mulberry fiber into a thin pulp to make the paper mulberry fiber softer and finer; Step 3: Screening: tear the pounded paper mulberry fibers into pieces and use screening tools to screen out paper mulberry fibers with a diameter of 5μm to 20μm. By controlling the fiber diameter, the density and elastic modulus of the diaphragm can be adjusted to optimize the sound quality performance; Step 4: Secondary impurity removal, using centrifugal soaking method to remove lignin and other impurities in the fiber, retaining high-purity paper mulberry fiber; Step 5: beating, beating the treated paper mulberry fibers to convert the paper mulberry fibers into fiber pulp; Step 6: Stirring: Use a high-speed stirrer to homogenize the slurry to ensure that the fibers in the slurry are evenly distributed; Step 7: Coating, evenly coating the slurry on the mold or substrate to form a preliminary diaphragm material structure; Step 8: Drying: the diaphragm material structure after coating is baked at a temperature of 70°C to 120°C to remove excess water. The drying time is 10 to 30 minutes. Step 9: hot pressing and shaping. The dried diaphragm material structure is shaped by hot pressing. The shaping temperature is 80℃~150℃ and the shaping time is 5~15 minutes. The diaphragm material structure after hot pressing is naturally cooled and shaped into a dome structure. Step 10: Assemble the diaphragm, and bond the shaped dome to the suspension edge and the positioning ring to finally form the paper mulberry fiber earphone diaphragm; Step 11: Testing: Conduct structural strength tests such as stretching on the finished paper mulberry fiber earphone diaphragm as well as acoustic performance tests such as sound pressure and frequency response. Compare the test data with conventional diaphragms to ensure the performance and strength of the paper mulberry fiber earphone diaphragm.

6. The method for preparing the paper mulberry fiber earphone diaphragm according to claim 5, characterized in that: In step 4, a centrifuge is used to remove lignin and other impurities in the fiber, and the rotation speed of the centrifuge is set to 150 rpm.

7. The method for preparing the paper mulberry fiber earphone diaphragm according to claim 5, characterized in that: In the step 5, a pulping machine is used to pulp the paper mulberry fibers, and the fiber pulp viscosity after pulping is 5 mPa·s, and the fiber pulp concentration is 3% to 5%.

8. The method for preparing the paper mulberry fiber earphone diaphragm according to claim 5, characterized in that: In step 6, the speed of the high-speed stirrer is set to 700 rpm, the stirring time is 30 min, and the solid content of the fiber slurry after stirring is not less than 1.2 g / cm 3 .

9. The method for preparing the paper mulberry fiber earphone diaphragm according to claim 5, characterized in that: In the step 7, a three-axis coating device is used to perform reciprocating coating processing, and the coating thickness is 10 μm to 105 μm.

10. An earphone with a paper mulberry fiber earphone diaphragm, characterized in that: It comprises a paper mulberry fiber earphone diaphragm, and the paper mulberry fiber earphone diaphragm is the paper mulberry fiber earphone diaphragm as claimed in any one of claims 1 to 4.

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