CN114643769A

CN114643769A - Leather diaphragm and preparation method thereof, shell assembly and electronic equipment

Info

Publication number: CN114643769A
Application number: CN202011514787.5A
Authority: CN
Inventors: 赵岩峰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2022-06-21

Abstract

The application provides a cortex diaphragm, including first leather layer, stratum lucidum and the second leather layer of range upon range of setting in proper order, first leather layer has the through-hole, the through-hole is used for exposing the part the stratum lucidum, first leather layer with the second leather layer has the colour difference. Forming a patterned area on the leather diaphragm by arranging through holes on the first leather layer, wherein the patterned area presents the color of the second leather layer and has layering; simultaneously first leather layer and second leather layer colour are different to appear the heterochrosis effect on cortex diaphragm surface, greatly promoted the outward appearance expressive force of cortex diaphragm, satisfy user's demand. The application also provides a preparation method of the cortical diaphragm, a shell assembly and an electronic device.

Description

Leather diaphragm and preparation method thereof, shell assembly and electronic equipment

Technical Field

The application belongs to the technical field of electronic products, and particularly relates to a leather diaphragm, a preparation method of the leather diaphragm, a shell assembly and electronic equipment.

Background

Leather is popular with consumers due to its pleasant touch and high-grade texture, and is gradually used in electronic devices. At present, leather is mainly pure in color, slightly monotonous in appearance and insufficient in expressive force, so that the appearance effect of the existing electronic equipment needs to be improved.

Disclosure of Invention

In view of this, the present application provides a cortical diaphragm, wherein a through hole is formed in the cortical diaphragm to form a patterned region, and the patterned region presents a color of the second leather layer and has a strong layering effect; meanwhile, the first leather layer and the second leather layer are different in color, so that a heterochromatic effect is presented on the surface of the leather diaphragm, and the appearance expressive force of the leather diaphragm is greatly improved; when the leather diaphragm is used in the shell assembly and the electronic equipment, the appearance effect of the shell assembly and the electronic equipment can be obviously improved.

In a first aspect, the application provides a leather diaphragm, including first leather layer, clear layer and the second leather layer of range upon range of setting in proper order, first leather layer has the through-hole, the through-hole is used for exposing the part the clear layer, first leather layer with the second leather layer has the colour difference.

In a second aspect, the present application provides a method for preparing a cortical diaphragm, comprising:

forming a transparent layer on the second leather layer;

forming a first leather layer on the surface of the transparent layer far away from the second leather layer;

and forming a through hole on the first leather layer through laser etching to expose part of the transparent layer, so as to prepare the leather diaphragm.

In a third aspect, the present application provides a housing assembly, including a housing and a leather diaphragm disposed on a surface of the housing, the leather diaphragm includes a first leather layer, a transparent layer and a second leather layer sequentially stacked, the first leather layer has a through hole, the through hole is used for exposing a portion of the transparent layer, and the first leather layer and the second leather layer have color difference.

In a fourth aspect, the present application provides an electronic device, including housing assembly and mainboard, housing assembly includes the casing and sets up housing surface's cortex diaphragm, the cortex diaphragm is including first leather layer, stratum lucidum and the second leather layer that stacks gradually the setting, first leather layer has the through-hole, the through-hole is used for exposing the part the stratum lucidum, first leather layer with the second leather layer has the colour difference.

The application provides a leather diaphragm, through setting up the through-hole on first leather layer to form the pattern region on leather diaphragm, this pattern region presents the color of second leather layer, and this pattern region has the stereovision; meanwhile, the first leather layer and the second leather layer are different in color, so that a heterochromatic effect is presented on the surface of the leather diaphragm, and the appearance expressive force of the leather diaphragm is greatly improved; the cortical diaphragm is simple in preparation method, convenient to operate and beneficial to industrial production; when the leather diaphragm is used in the shell assembly and the electronic equipment, the appearance effects of the shell assembly and the electronic equipment can be obviously improved, and the requirements of users are met.

Drawings

In order to more clearly explain the technical solution in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

Fig. 1 is a schematic structural diagram of a cortical diaphragm according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a cortical diaphragm provided in another embodiment of the present application.

Fig. 3 is a schematic structural diagram of a cortical diaphragm provided in another embodiment of the present application.

Fig. 4 is a schematic structural diagram of a cortical diaphragm provided in another embodiment of the present application.

Fig. 5 is a schematic structural diagram of a cortical diaphragm provided in another embodiment of the present application.

Fig. 6 is a schematic structural diagram of a cortical diaphragm provided in another embodiment of the present application.

Fig. 7 is a schematic structural diagram of a cortical diaphragm provided in another embodiment of the present application.

Fig. 8 is a flowchart of a method for preparing a cortical diaphragm according to an embodiment of the present disclosure.

Fig. 9 is an appearance schematic diagram of a cortical diaphragm before and after laser etching according to an embodiment of the present disclosure, where (a) in fig. 9 is an appearance schematic diagram before laser etching, and (b) in fig. 9 is an appearance schematic diagram after laser etching.

Fig. 10 is an appearance schematic diagram of a cortical diaphragm before and after laser etching according to another embodiment of the present disclosure, where (a) in fig. 10 is an appearance schematic diagram before laser etching, and (b) in fig. 10 is an appearance schematic diagram after laser etching.

Fig. 11 is a schematic structural diagram of a housing assembly according to an embodiment of the present application.

Fig. 12 is an external view of a housing assembly according to an embodiment of the present disclosure.

Fig. 13 is an external view of a housing assembly according to another embodiment of the present disclosure.

Fig. 14 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of reference numerals:

a first leather layer-11, a second leather layer-12, a transparent layer-13, through holes-14, a foaming layer-15, a base cloth layer-16, a protective layer-17, a leather diaphragm-10, a shell-20 and a shell assembly-100.

Detailed Description

The following is a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and embellishments can be made without departing from the principle of the present application, and these modifications and embellishments are also regarded as the scope of the present application.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, a schematic structural diagram of a leather diaphragm according to an embodiment of the present disclosure is provided, in which a leather diaphragm 10 includes a first leather layer 11, a transparent layer 13, and a second leather layer 12 sequentially stacked, the first leather layer 11 has a through hole 14, the through hole 14 is used for exposing a portion of the transparent layer 13, and the first leather layer 11 and the second leather layer 12 have a color difference. In the present application, a patterned region is formed on the cortical diaphragm 10 by providing a through hole 14 on the first leather layer 11; the transparent layer 13 is exposed due to the arrangement of the through holes 14, and the transparent layer 13 is transparent, so that the color of the second leather layer 12 cannot be blocked, the patterned region formed by the through holes 14 has the color of the second leather layer 12, and the layering sense of the patterned region formed by the through holes 14 is strong; and first leather layer 11 is different with second leather layer 12 colour for the surface of cortex diaphragm 10 presents the effect of heterochrosis, has greatly promoted the outward appearance expressive force of cortex diaphragm 10. In this application, through set up the stratum lucidum 13 between first leather layer 11 and second leather layer 12 to can be so that at the in-process of shaping through-hole 14, play the guard action to second leather layer 12, avoid this in-process second leather layer 12 to receive the damage, improve the product yield.

In the present application, the first leather layer 11 gives the leather feel to the leather diaphragm 10. In an embodiment of the present disclosure, the material of the first leather layer 11 includes at least one of polyurethane and polyvinyl chloride, and a first pigment, so that the first leather layer 11 has certain elasticity and color. Alternatively, the polyurethane includes at least one of a polyester type, a polyether type and a polycarbonate type. Specifically, the first pigment may be, but not limited to, yellow, red, blue, white, black, gray, cyan, green, orange, violet, etc., and may be selected as needed.

In the present application, the second leather layer 12 gives the leather feel to the leather diaphragm 10. In an embodiment of the present disclosure, the material of the second leather layer 12 includes at least one of polyurethane and polyvinyl chloride, so that the second leather layer 12 has certain elasticity. In one embodiment, the material of the second leather layer 12 does not contain pigment, and the first leather layer 11 and the second leather layer 12 have color difference. In another embodiment, the second leather layer 12 is made of a second pigment, and the first pigment and the second pigment have different colors, so that the first leather layer 11 and the second leather layer 12 have different colors. Specifically, the second pigment may be, but not limited to, yellow, red, blue, white, black, gray, cyan, green, orange, violet, etc., and may be selected as desired. In the application, by controlling the color of the first pigment and/or the second pigment, the color of the first leather layer 11 and the second leather layer 12 and the color difference between the first leather layer and the second leather layer can be controlled, so that the different colors are formed on the surface of the leather diaphragm 10, and the visual effect is greatly improved.

In the present application, the first leather layer 11 and the second leather layer 12 have a color difference, so that the leather diaphragm 10 has a heterochromatic effect. It will be appreciated that the Lab color model consists of L, a and b elements, each color having a Lab value, and the difference between the two colors (the color difference value) is represented by Δ E. In the present embodiment, the color difference value of the first leather layer 11 and the second leather layer 12 is greater than 4. The patterned region formed by the through holes 14 has the color of the second leather layer 12, which has a significant color difference from the color of the first leather layer 11, so that the pattern of the patterned region is more clearly shown, and the heterochromatic effect of the leather diaphragm 10 is also more significant. Further, the color difference value of the first leather layer 11 and the second leather layer 12 is greater than 5. Further, the difference in color between the first leather layer 11 and the second leather layer 12 is greater than 6. Specifically, the color difference value of the first leather layer 11 and the second leather layer 12 may be, but is not limited to, greater than 4, 5, 6, 7, or 8. In one embodiment, the L value of the first leather layer 11 is less than 40, and the L value of the second leather layer 12 is greater than 80, which has obvious color difference and brightness difference.

In the present embodiment, the optical transmittance of first leather layer 11 is less than 30%. That is, the first leather layer 11 is in a solid color, which can generate a barrier effect on the transparent layer 13 and the second leather layer 12, so that the color of the second leather layer 12 is only displayed through the through holes 14 on the first leather layer 11, which is beneficial for displaying the patterned region. Wherein the optical transmittance is the transmittance of light in the wavelength range of 380nm-780 nm. Further, the optical transmittance of the first leather layer 11 is less than 10%. Specifically, the optical transmittance of the first leather layer 11 may be, but is not limited to, less than 5%, 6%, 8%, 10%, 12%, 15%, 20%, 27%, or 29%.

In the present application, the optical transmittance of the second leather layer 12 can be selected as desired. In one embodiment, the optical transmittance of the second leather layer 12 is less than 30%. That is to say, the second leather layer 12 is a real color, and when the second leather layer is applied to the housing assembly 100 and the electronic device, the second leather layer can block other structures, so as to avoid the influence on the appearance effect, and meanwhile, the patterned region formed by the through hole 14 is also a real color, so that the patterned effect is more clearly presented. Specifically, the optical transmittance of the second leather layer 12 may be, but is not limited to, less than 5%, 6%, 8%, 10%, 15%, 20%, 25%, or 30%. In another embodiment, the optical transmittance of the second leather layer 12 is greater than 80%. That is to say, the second leather layer 12 is transparent, so that the patterned region formed by the through holes 14 is also transparent, and has a difference in color and texture from the appearance of the first leather layer 11, thereby further improving the appearance of the leather diaphragm 10. Specifically, the optical transmittance of the second leather layer 12 may be, but is not limited to, greater than 80%, 82%, 85%, 88%, 90%, or 92%.

In the present embodiment, the first leather layer 11 and the second leather layer 12 may be formed by coating, printing, casting, calendering, or the like. In one embodiment, the first ink may be applied by spraying and cured to form the first leather layer 11. Wherein the first ink includes at least one of polyurethane and polyvinyl chloride, and a first pigment. In another embodiment, the second leather layer 12 may be formed by casting a second ink, which is cured. Wherein the second ink comprises at least one of polyurethane and polyvinyl chloride, and can also comprise a second pigment. Optionally, the curing comprises baking at 110-140 ℃ for 2-5 min. Further, the curing comprises baking at 110-130 ℃ for 2.5-4 min. The thickness of the first leather layer 11 and the second leather layer 12 is controlled by controlling the amount of the first ink and the second ink used in the preparation process. In the present application, the thickness of first leather layer 11 and second leather layer 12 may be selected as desired. In the embodiment of the present application, the thickness of each of the first leather layer 11 and the second leather layer 12 can be 20 μm to 50 μm, which not only enables the leather diaphragm 10 to have good color appearance, but also has a small thickness, which does not increase the weight of the leather diaphragm 10 too much, thereby facilitating the application of the leather diaphragm in the housing assembly 100 and the electronic device. The thicknesses of the first leather layer 11 and the second leather layer 12 may be the same or different. Further, the thickness of the first leather layer 11 and the second leather layer 12 is 25 μm to 48 μm, respectively. Further, the first leather layer 11 and the second leather layer 12 have a thickness of 30 μm to 43 μm, respectively. Specifically, the thickness of the first leather layer 11 and the second leather layer 12 may be, but is not limited to, 20 μm, 23 μm, 25 μm, 30 μm, 35 μm, 37 μm, 40 μm, 45 μm, or 50 μm.

In one embodiment of the present application, a side surface of the first leather layer 11 away from the transparent layer 13 has a first leather stripe structure. It is understood that the dermatoglyph structure refers to a raised texture structure that is raised on the fingers, palms, toes and soles of the feet. In this application, the dermatoglyph structure can be but not limited to for lines such as cow dermatoglyph, crocodile line, lizard line, ostrich dermatoglyph, python dermatoglyph, litchi line, present concave-convex structure's stereoscopic effect to make cortex diaphragm 10 have the line of leather, produce the dermatoglyph sense of touch. In another embodiment of the present application, a side surface of the second leather layer 12 close to the transparent layer 13 has a second leather texture structure, so that a patterned region formed by the through hole 14 has a leather texture, and a patterned appearance effect having a leather texture is formed on a surface of the leather diaphragm 10. In another embodiment of the present application, a side surface of the first leather layer 11 away from the transparent layer 13 has a first leather texture, and a side surface of the second leather layer 12 close to the transparent layer 13 has a second leather texture, and the first leather texture is different from the second leather texture. Therefore, the cortical diaphragm 10 has the touch feeling of the first dermatoglyph line, and meanwhile, the patterned area formed by the through hole 14 presents the appearance of the second dermatoglyph line which is different from the first dermatoglyph line, so that the different colors and the different textures are realized on the cortical diaphragm 10. In the present application, the first leather layer 11 or the second leather layer 12 may be formed by coating the first ink or the second ink on the surface of the release paper having the texture and curing the first ink or the second ink. The texture of the surface of the release paper is controlled, so that a first leather texture structure or a second leather texture structure is formed on the surface of the first leather layer 11 or the second leather layer 12.

In the present application, a patterned region can be present on the cortical diaphragm 10 by providing the through-hole 14 on the surface of the first leather layer 11. It can be understood that the through holes 14 are hollow areas, and the depth direction of the through holes 14 is the thickness direction of the first leather layer 11. The through holes 14 can form various appearance effects such as characters, marks, patterns and the like so as to improve the appearance and application value of the leather diaphragm 10. In the present application, the through hole 14 is used to expose a portion of the transparent layer 13, so the depth of the through hole 14 is not less than the thickness of the first leather layer 11, and is less than the sum of the thicknesses of the first leather layer 11 and the transparent layer 13. In the present application, the depth of the through-hole may be set according to the thickness of the first leather layer 11 and the transparent layer 13. In one embodiment, the depth of the via may be 20 μm to 75 μm. Further, the depth of the through-hole may be 30 μm to 70 μm. Specifically, the depth of the via hole may be, but is not limited to, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, or 70 μm. In one embodiment, referring to fig. 1, the depth of the through hole 14 is equal to the thickness of the first leather layer 11. So that the transparent layer 13 can be exposed through the through-hole 14 without damaging the transparent layer 13. In another embodiment, please refer to fig. 2, which is a schematic structural diagram of a cortical diaphragm according to another embodiment of the present application, and is substantially the same as fig. 1, except that the through hole 14 extends into the transparent layer 13. That is, the depth of the through hole 14 is greater than the thickness of the first leather layer 11 and less than the sum of the thicknesses of the first leather layer 11 and the transparent layer 13. In the embodiment of the present application, the through holes 14 may be formed on the surface of the first leather layer 11 by a laser etching process. The laser etching process is accurate, delicate, efficient, rapid, safe and reliable, is beneficial to forming the through hole 14, and cannot damage other structures. In the present application, the number, shape, arrangement, and the like of the through holes 14 may be selected as needed. In one embodiment, the orthographic projection of the through holes 14 on the first leather layer 11 is a plurality of characters distributed at intervals. In another embodiment, the orthographic projection of the through holes 14 on the first leather layer 11 is a graphical pattern. In yet another embodiment, the orthographic area of through-holes 14 on first leather layer 11 is less than 30% of the area of first leather layer 11. Therefore, the leather texture of the leather diaphragm 10 can be more, and the leather diaphragm has a different patterned area. Further, the orthographic projection area of the through hole 14 on the first leather layer 11 accounts for less than 20% of the area of the first leather layer 11. Specifically, the orthographic projection area of the through hole 14 on the first leather layer 11 accounts for 10% or less, 12% or less, 15% or less, 18% or less, 20% or less, 23% or less, 25% or less, or 28% or less of the area of the first leather layer 11.

In the present application, the transparent layer 13 is disposed as an intermediate layer between the first leather layer 11 and the second leather layer 12 for protection. In one embodiment, the transparent layer 13 can protect the second leather layer 12 when the via hole 14 is formed by laser etching, so as to prevent damage to the second leather layer 12 during the laser etching process. In another embodiment, when the first leather layer 11 and the second leather layer 12 are formed by coating or the like, the pigment in the ink may diffuse during curing, thereby affecting the color of the other layer; the first leather layer 11 and the second leather layer 12 can be separated by transparency, and color diffusion to the second leather layer 12 or the first leather layer 11 before the first leather layer 11 or the second leather layer 12 is formed is avoided, so that two respective colors can be better presented.

In the embodiment of the present application, the optical transmittance of the transparent layer 13 is greater than 90%, so that the original color of the second leather layer 12 can be presented to the greatest extent, and the heterochromatic effect of the leather diaphragm 10 is more obvious. Further, the optical transmittance of the transparent layer 13 is greater than 92%. In the embodiment of the present application, the transparent layer 13 has a thickness of 10 μm to 30 μm. The first leather layer 11 and the second leather layer 12 can be separated and protected, the weight of the leather diaphragm 10 is not increased too much, and the color of the second leather layer 12 is not shielded. Further, the transparent layer 13 has a thickness of 12 μm to 25 μm. Further, the transparent layer 13 has a thickness of 15 μm to 23 μm. Specifically, the thickness of the transparent layer 13 may be, but is not limited to, 10 μm, 12 μm, 15 μm, 17 μm, 20 μm, 23 μm, 25 μm, or 28 μm.

In the present embodiment, the transparent layer 13 includes at least one of a transparent ink layer and an optical film layer. The transparent ink layer and the optical film layer can protect the first leather layer 11 and the second leather layer 12, and the optical film layer can enable a patterned area formed by the through hole 14 to have a visual effect of changing light and shadow.

In one embodiment of the present application, the transparent layer 13 includes a transparent ink layer. At this time, the transparent layer 13 may be formed by curing after the transparent ink is coated, printed, cast, and rolled. Specifically, the transparent layer 13 may be formed by, but not limited to, multiple coating and curing. In the present application, the material of the transparent ink can be selected as needed. In one embodiment, the resin material of the transparent ink is the same as the resin material of at least one of the first ink and the second ink, so that the bonding force between the transparent layer 13 and the first leather layer 11 and the second leather layer 12 can be improved. Specifically, the resin material of the transparent ink may include, but is not limited to, at least one of polyurethane and polyvinyl chloride.

In another embodiment of the present application, the transparent layer 13 includes an optical film layer. It will be appreciated that the optical film is a layer of optical medium material that transmits light through its interface, and that the reflection, refraction, etc. of light passing through the optical film can be altered to cause the cortical diaphragm 10 to exhibit some gloss variation. The reflectivity of the optical film layer is changed by changing the material, the thickness, the layer number and the like of the optical film layer, so that different visual effects are realized, and the requirements under different scenes are met. In one embodiment, the optical film layer is formed by alternately laminating at least two optical films having different refractive indexes. Further, the optical film layer is formed by alternately laminating at least two kinds of optical films having different refractive indexes periodically. The plurality of optical films may be made of the same material or have different thicknesses. The optical properties of the plurality of optical films are different. In another embodiment, the material of the optical film layer may be inorganic or organic, and the optical film layer may be formed by, but not limited to, vapor deposition or coating. Furthermore, the material of the optical film layer is organic matter, so that the combination effect of the optical film layer, the first leather layer 11 and the second leather layer 12 can be improved, and the overall stability of the leather diaphragm 10 is improved. Optionally, the organic substance comprises at least one of a polyether, a polyester, a fluoropolymer, and a silicon-containing polymer. At this moment, the flexibility of the optical film layer is good, the flexibility is good, the required size can be obtained by cutting, chemical bonds are generated between organic matters in the optical film layer and organic matters in the first leather layer 11 and the second leather layer 12, and the binding force is improved.

Please refer to fig. 3, which is a schematic structural diagram of a leather diaphragm according to another embodiment of the present application, and is substantially the same as fig. 1, except that the leather diaphragm further includes a foaming layer 15, and the foaming layer 15 is disposed on a side surface of the second leather layer 12 away from the transparent layer 13. In the present application, the foaming layer 15 is soft and has good resilience, and gives the leather diaphragm 10 a soft and elastic touch feeling, thereby improving the leather texture of the leather diaphragm 10. In one embodiment, the material of the foam layer 15 includes at least one of polyurethane, polyvinyl chloride, thermoplastic elastomer, and ethylene-vinyl acetate copolymer. Furthermore, the foaming layer 15 is made of the same resin material as the second leather layer 12, so that the two layers have better bonding force in the laminating process, and the structural stability of the leather diaphragm 10 is improved. In one embodiment, the material of the foam layer 15 and the second leather layer 12 includes polyurethane. In another embodiment, the foam layer 15 is formed after foaming by applying a foaming slurry. Further, the foaming slurry comprises a resin main material and a foaming agent, wherein the resin main material comprises at least one of polyurethane, polyvinyl chloride, thermoplastic elastomer and ethylene-vinyl acetate copolymer. Furthermore, the foaming slurry further comprises at least one of a foaming auxiliary agent, a leveling agent, a defoaming agent and a stabilizing agent, so that the foaming layer 15 can form a proper number of holes, the performance of the foaming layer 15 is improved, and the foaming layer 15 with soft and elastic texture is obtained. In the present application, the thickness of the foamed layer 15 can be selected as needed. In the present embodiment, the thickness of the foam layer 15 is 30 μm to 200 μm, and the soft and elastic texture can be imparted to the leather film 10 without increasing the thickness too much. Further, the thickness of the foamed layer 15 is 50 μm to 150 μm. Specifically, the thickness of foam layer 15 may be, but is not limited to, 30 μm, 50 μm, 80 μm, 100 μm, 140 μm, 150 μm, 170 μm, or 200 μm.

Referring to fig. 4, a schematic structural diagram of a leather diaphragm according to another embodiment of the present disclosure is substantially the same as that of fig. 3, except that a base fabric layer 16 is further included, and the base fabric layer 16 is disposed on a side surface of the second leather layer 12 away from the transparent layer 13. In the present application, the base fabric layer 16 serves as a substrate to support other layer structures, and further increases the leather texture of the leather diaphragm 10 to be closer to the leather texture. In one embodiment, the base layer 16 includes at least one of a woven fabric and a nonwoven fabric. Specifically, the base fabric layer 16 includes nylon fabric, polyester fabric, and the like. In another embodiment, the thickness of the scrim layer 16 is between 50 μm and 200 μm. Further, the thickness of the base fabric layer 16 is 80 μm to 180 μm. In yet another embodiment, when the cortical diaphragm 10 further includes the foam layer 15 and the base fabric layer 16, the foam layer 15 is disposed between the base fabric layer 16 and the second leather layer 12. In this case, the foaming layer 15 may be directly formed on the surface of the base fabric layer 16 to improve the bonding force therebetween.

In the present embodiment, the cortical diaphragm 10 further includes a protective layer 17, and the optical transmittance of the protective layer 17 is greater than 90%. Fig. 5 is a schematic structural diagram of a leather diaphragm according to another embodiment of the present disclosure, which is substantially the same as fig. 1, except that the leather diaphragm further includes a protective layer 17, and the protective layer 17 covers the surface of the transparent layer 13 exposed by the through hole 14. Referring to fig. 6, it is substantially the same as fig. 5 except that the protective layer 17 covers a side surface of the first leather layer 11 away from the transparent layer 13. Referring to fig. 7, it is substantially the same as fig. 5 except that the protection layer 17 covers the surface of the transparent layer 13 exposed by the through hole 14, and the protection layer 17 covers a side surface of the first leather layer 11 away from the transparent layer 13. In the present application, the protective layer 17 has a transparent appearance, so that the color of the first leather layer 11 and the second leather layer 12 is not affected, the pattern area formed by the through holes 14 is not affected, and the leather membrane 10 can be protected. In the present application, the material of the protective layer 17 may be selected as required. In one embodiment, in order to improve the bonding force between the protective layer 17 and the first leather layer 11 and/or the transparent layer 13, a protective ink may be formed by mixing a protective agent with a resin having the same material as the first leather layer 11 and/or the transparent layer 13, and then the protective ink may be coated and cured to form the protective layer 17. Specifically, the anti-fingerprint effect of the protective layer 17 can be enhanced by, but not limited to, adding an anti-fingerprint material to the protective ink. In the present application, the thickness of the protective layer 17 may be selected as desired. In one embodiment, the surface of the first leather layer 11 is provided with a leather texture, and the thickness of the protective layer 17 is smaller than the height of the leather texture, so that the leather diaphragm 10 has a leather texture touch. In particular, the thickness of the protective layer 17 may be, but is not limited to, 3 μm to 12 μm, such as 3 μm, 5 μm, 8 μm, 10 μm, or 11 μm. In another embodiment, the protective layer 17 has a thickness of 20 μm to 40 μm, thereby protecting the first dermatoglyph structure from abrasion. Specifically, the thickness of the protective layer 17 may be, but is not limited to, 20 μm, 25 μm, 30 μm, 32 μm, 35 μm, or 40 μm.

In the application, the through holes 14 on the first leather layer 11 can form a patterned region on the leather diaphragm 10, and present the color of the second leather layer 12, which is different from the color of the first leather layer 11, so that the leather diaphragm 10 has both the patterned region and the color splicing effect, and the appearance expressive force is improved.

The present application also provides a method of preparing the cortical diaphragm 10 of any of the embodiments described above. Referring to fig. 8, a flow chart of a method for preparing a cortical membrane according to an embodiment of the present application includes:

operation 101: a transparent layer is formed over the second leather layer.

Operation 102: and forming the first leather layer on the surface of the transparent layer far away from the second leather layer.

Operation 103: and forming a through hole on the first leather layer through laser etching to expose part of the transparent layer, so as to obtain the leather diaphragm.

In the related art, the first leather layer 11 and the second leather layer 12 are directly stacked, and when the first leather layer 11 is formed, the pigment can permeate into the surface of the second leather layer 12, so that the color of the surface of the second leather layer 12 exposed by the through hole 14 is smaller than or even not different from the color of the first leather layer 11, and the effect of different appearance cannot be realized; meanwhile, damage to the surface of the second leather layer 12 cannot be avoided during laser etching, the surface state of the second leather layer 12 exposed by the through holes 14 is affected, and the quality of the leather diaphragm 10 is affected. In the present application, by providing the transparent layer 13, when the first leather layer 11 is formed, the colorant of the first leather layer 11 is prevented from permeating into the second leather layer 12, thereby preventing the occurrence of the color mixing problem and forming an obvious heterochromatic effect; meanwhile, in the laser etching process, the transparent layer 13 can protect the second leather layer 12, and damage is avoided.

In operation 101, the transparent layer 13 includes at least one of a transparent ink layer and an optical film layer. In one embodiment, when the transparent layer 13 includes a transparent ink layer, the transparent ink is coated, printed, cast, calendered, and cured to form the transparent layer 13. Specifically, the transparent layer 13 may be formed by coating and curing a plurality of times, for example, by coating 1 to 3 times, and curing after each spraying, to finally form the transparent layer 13. Optionally, the curing comprises baking at 110-140 ℃ for 2-5 min. In another embodiment, the transparent layer 13 comprises an optical film layer. When the optical film layer is made of inorganic matter, the optical film layer is formed on the surface of the second leather layer 12 in a vapor deposition mode; when the material of the optical film layer is organic, the optical film layer is formed on the surface of the second leather layer 12 by a coating method.

In the present embodiment, forming second leather layer 12 is also included. In one embodiment, the second leather layer 12 is formed by coating, printing, casting, calendaring the second ink, and curing. Optionally, the second ink includes at least one of polyurethane and polyvinyl chloride. Further, the second ink further includes a second pigment. Specifically, the curing process can be but not limited to baking at 110-140 ℃ for 2-5 min. In another embodiment, the second leather layer 12 is formed after curing by coating, printing, casting, and calendaring the second ink on the surface of the release paper; the release paper is then peeled off to provide a second leather layer 12 having a second grain structure. Wherein, the surface of the release paper is provided with a texture structure corresponding to the second texture structure. Further, the transparent layer 13 is disposed on the surface of the second leather layer 12 having the second texture, so that the through holes 14 can be exposed to the second texture.

In operation 102, a first leather layer 11 may be formed on the surface of the transparent layer 13 by coating, printing, casting, or calendaring the first ink, and then cured. Optionally, the first ink includes at least one of polyurethane and polyvinyl chloride. Further, the first ink further includes a first pigment. Specifically, the curing process can be, but not limited to, baking at 110-140 ℃ for 2-5 min. In another embodiment, the first leather layer 11 is formed after curing by coating, printing, casting, and calendaring the first ink on the surface of the release paper; and then the first leather layer 11 and the release paper are peeled off and arranged on the surface of the transparent layer 13, wherein the surface of the first leather layer 11 has a first leather grain structure, and the surface of the release paper has a grain structure corresponding to the first leather grain structure.

In operation 103, the refinement degree of the formed through holes 14 can be controlled by laser etching, so that burrs are avoided, and the fineness of the whole structure is improved. It is understood that, in order to form the via hole 14, the depth of the laser engraving needs to be not less than the thickness of the first leather layer 11. In one embodiment, the depth of the laser engraving is less than the sum of the thicknesses of the first leather layer 11 and the transparent layer 13. So that the transparent layer 13 and the second leather layer 12 can be exposed from the through holes 14, and the laser etching does not damage the second leather layer 12. Through the transparent layer 13, the laser etching depth in the laser etching process is easier to control, and the process difficulty is reduced. In a specific embodiment, a carbon dioxide laser etching machine is adopted for laser etching, the laser etching speed is 1600-1800 mm/s, the rated power is 30-50W, the power efficiency is 65-70%, the frequency is 20-30 Hz, and the interval between adjacent through holes 14 is 0.06-0.12 mm. Thereby removing a portion of the first leather layer 11 to form a via hole 14 exposing the transparent layer 13 and the second leather layer 12. Specific laser etching parameters can be selected according to needs.

Fig. 9 is an appearance schematic diagram of a cortical diaphragm before and after laser etching according to an embodiment of the present application, where (a) in fig. 9 is an appearance schematic diagram before laser etching, and (b) in fig. 9 is an appearance schematic diagram after laser etching. It can be seen that through holes 14 are formed on first leather layer 11 through laser etching, and the through holes 14 form a pattern, so that leather diaphragm 10 has a pattern effect and the pattern area has a different color from that of first leather layer 11, thereby generating a heterochromatic effect. Please refer to fig. 10, which is an appearance diagram of a cortical diaphragm before and after laser etching according to another embodiment of the present disclosure, wherein (a) in fig. 10 is an appearance diagram before laser etching, and (b) in fig. 10 is an appearance diagram after laser etching. It can be seen that through radium carving the through hole 14 formed in the first leather layer 11, the through hole 14 forms a character mark, so that the leather diaphragm 10 has the character mark, and the character mark is different from the color of the first leather layer 11, thereby generating a heterochromatic effect.

In the embodiment of the present application, a foaming layer 15 is further disposed on a side surface of the second leather layer 12 away from the transparent layer 13. In one embodiment, the foaming layer 15 is formed after foaming by coating foaming slurry; foamed layer 15 is provided on the surface of second leather layer 12 by an adhesive. Optionally, the material of the foaming layer 15 includes at least one of polyurethane, polyvinyl chloride, thermoplastic elastomer and ethylene-vinyl acetate copolymer. Furthermore, the foaming layer 15 is made of the same resin material as the second leather layer 12, so that the two layers have better bonding force in the laminating process, and the structural stability of the leather diaphragm 10 is improved.

In the present embodiment, disposing a base fabric layer 16 on a side surface of the second leather layer 12 away from the transparent layer 13 is further included. In one embodiment, the scrim layer 16 may be disposed on the surface of the second leather layer 12 by an adhesive. In another embodiment, the base fabric layer 16 is coated with a foaming slurry, and the foaming layer 15 is formed after foaming; the foamed layer 15 and the base fabric layer 16 are provided on the surface of the second leather layer 12 by an adhesive. Optionally, the base fabric layer 16 includes at least one of a woven fabric and a nonwoven fabric. Specifically, the base fabric layer 16 includes nylon fabric, polyester fabric, and the like.

In the embodiment of the present application, the method further includes forming a protective layer 17 on the surface of the transparent layer 13 exposed from the through hole 14, and/or forming a protective layer 17 on the surface of the first leather layer 11 away from the transparent layer 13. In one embodiment, protective ink is coated or sprayed on the surface of the transparent layer 13 exposed by the through hole 14, and/or protective ink is coated or sprayed on the surface of the first leather layer 11 away from the transparent layer 13, and the protective ink is cured to obtain the protective layer 17. Specifically, the curing may include, but is not limited to, baking at 100 ℃ to 150 ℃ for 1min to 4 min.

The preparation method of the cortical diaphragm 10 is simple, convenient to operate and low in process difficulty, and can be used for large-scale production.

The present application further provides a housing assembly 100 comprising the cortical diaphragm 10 of any of the embodiments described above. Referring to fig. 11, a schematic structural diagram of a housing assembly according to an embodiment of the present application is shown, in which the housing assembly 100 includes a housing 20 and a cortical diaphragm 10. The shell assembly 100 with the leather diaphragm 10 has leather texture, a patterned area, strong layering, visual collision of different colors and rich appearance effect. In the present embodiment, the cortical diaphragm 10 is disposed on the surface of the housing 20.

In the present embodiment, the material of the housing 20 can be, but is not limited to, any known material that can be used for the electronic device housing assembly 100, such as plastic, glass, ceramic, metal, etc. In the present application, the thickness of the case 20 is not particularly limited. Specifically, the thickness of the housing 20 may be, but is not limited to, 0.1mm to 1mm, such as 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, or 0.9mm, etc. In the present application, the specific shape and size of the housing 20 are not limited, and may be selected and designed according to actual needs, for example, the shape of the housing 20 may be a 2D shape, a 2.5D shape, a 3D shape, and the like, and the housing 20 may be, but is not limited to, a rear case, a middle frame, and the like of an electronic device.

It will be appreciated that the housing 20 has oppositely disposed inner and outer surfaces. In an embodiment of the present application, when the housing 20 is a transparent housing, the cortical diaphragm 10 may be disposed on an inner surface of the housing 20, or may be disposed on an outer surface of the housing 20. In one embodiment, the leather diaphragm 10 may be disposed on the inner surface of the housing 20 with the first leather layer 11 disposed between the transparent layer 13 and the housing 20, such that the housing assembly 100 has the visual effect of leather, as well as a patterned area of color. In another embodiment, the leather diaphragm 10 may be disposed on the outer surface of the housing 20, and the second leather layer 12 is disposed between the transparent layer 13 and the housing 20, so that the housing assembly 100 has the texture and feel of leather, and also has a patterned area of color. In another embodiment of the present application, when the housing 20 is an opaque housing, the leather diaphragm 10 is disposed on the outer surface of the housing 20, and the second leather layer 12 is disposed between the transparent layer 13 and the housing 20, so that the housing assembly 100 can have the appearance effect of the leather diaphragm 10. In one embodiment, the cortical diaphragm 10 may be disposed on the surface of the shell 20 by an adhesive.

Referring to fig. 12, an external view of the housing assembly according to an embodiment of the present invention is shown, in which the through hole 14 is a graphic area, so that a graphic with a certain color is formed on the surface of the housing assembly 100. Referring to fig. 13, an appearance of the housing assembly according to another embodiment of the present disclosure is schematically illustrated, wherein the through holes 14 are text patterns, so that text marks are formed on the surface of the housing assembly 100. The appearance effect of the housing assembly 100 is greatly improved by the leather diaphragm 10.

The present application further provides an electronic device comprising the housing assembly 100 of any of the above embodiments. It is understood that the electronic device may be, but is not limited to, a cell phone, a tablet, a laptop, a watch, MP3, MP4, GPS navigator, digital camera, etc. The following description will be made by taking a mobile phone as an example. Referring to fig. 14, a schematic structural diagram of an electronic device according to an embodiment of the present disclosure is shown, where the electronic device includes a housing assembly 100 and a main board, and the electronic device having the housing assembly 100 has a leather texture, a patterned area and a color splicing effect, so that product competitiveness is greatly improved, and user experience is improved.

The foregoing detailed description has provided for the embodiments of the present application, and the principles and embodiments of the present application have been presented herein for purposes of illustration and description only and to facilitate understanding of the methods and their core concepts; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The leather diaphragm is characterized by comprising a first leather layer, a transparent layer and a second leather layer which are sequentially stacked, wherein the first leather layer is provided with a through hole, the through hole is used for exposing part of the transparent layer, and the first leather layer and the second leather layer have color difference.

2. The cortical diaphragm of claim 1, wherein the transparent layer has an optical transmittance of greater than 90% and a thickness of 10 μm to 30 μm.

3. The cortical diaphragm of claim 1, wherein said transparent layer includes at least one of a transparent ink layer and an optical film layer.

4. The cortical diaphragm of claim 1, wherein the difference in color between the first leather layer and the second leather layer is greater than 4.

5. The cortical diaphragm of claim 1, wherein the first leather layer has a thickness of 20 μm to 50 μm, and the second leather layer has a thickness of 20 μm to 50 μm.

6. The cortical diaphragm of claim 1, wherein the depth of the through-hole is greater than or equal to the thickness of the first leather layer and less than the sum of the thicknesses of the first leather layer and the transparent layer.

7. The leather diaphragm as claimed in claim 1, wherein a side surface of said first leather layer facing away from said transparent layer has a first leather texture, and a side surface of said second leather layer facing away from said transparent layer has a second leather texture, said first leather texture being different from said second leather texture.

8. The leather diaphragm of claim 1, further comprising a foam layer disposed on a side surface of said second leather layer remote from said transparent layer.

9. The cortical diaphragm of claim 1, further comprising a scrim layer disposed on a side surface of said second leather layer distal from said transparent layer.

10. The leather diaphragm as claimed in claim 1, further comprising a protective layer having an optical transmittance of more than 90%, wherein the protective layer covers a surface of the transparent layer exposed from the through hole, and/or wherein the protective layer covers a surface of the first leather layer on a side away from the transparent layer.

11. A method for preparing a cortical diaphragm, comprising:

forming a transparent layer on the second leather layer;

12. The method of claim 11, wherein a depth of the laser engraving is less than a sum of thicknesses of the first leather layer and the transparent layer.

13. The method of claim 11, further comprising forming a protective layer on a surface of the transparent layer exposed by the through hole, and/or forming the protective layer on a surface of the first leather layer on a side away from the transparent layer.

14. The shell assembly is characterized by comprising a shell and a leather diaphragm arranged on the surface of the shell, wherein the leather diaphragm comprises a first leather layer, a transparent layer and a second leather layer which are sequentially stacked, the first leather layer is provided with a through hole, the through hole is used for exposing a part of the transparent layer, and the first leather layer and the second leather layer have color difference.

15. The housing assembly of claim 14, wherein the second leather layer is disposed between the housing and the transparent layer.

16. The electronic device is characterized by comprising a shell assembly and a main board, wherein the shell assembly comprises a shell and a leather diaphragm arranged on the surface of the shell, the leather diaphragm comprises a first leather layer, a transparent layer and a second leather layer which are sequentially stacked, the first leather layer is provided with a through hole, the through hole is used for exposing a part of the transparent layer, and the first leather layer and the second leather layer have color difference.