Magnetic ink, diaphragm, diaphragm manufacturing method, shell and electronic equipment

Abstract

The invention provides magnetic ink, a diaphragm, a manufacturing method of the diaphragm, a shell and electronic equipment, the magnetic ink comprises magnetic particles, each magnetic particle comprises an insulating layer and magnetic toner, and the magnetic toner is accommodated in an accommodating space formed by the insulating layer. The magnetic toner is accommodated in the accommodating space formed by the insulating layer to form the magnetic particles, so that the magnetic particles have good stability. As the magnetic particles can be arranged in the magnetic field environment to form the pattern, when the magnetic particles are arranged in the shell and applied to the electronic equipment, the electronic equipment can have a good appearance effect, interference of magnetic ink on devices such as an antenna and a sensor in the electronic equipment can be reduced, and the service life of the electronic equipment is prolonged. Therefore, the electronic equipment is ensured to have good performance.

Description

Technical Field

[0001] The present disclosure relates to the technical field of surface treatment technology, and in particular to a magnetic ink, a diaphragm, a method for manufacturing the diaphragm, a housing, and an electronic device. Background Art

[0002] With the development of science and technology and the popularization of electronic devices, users have higher and higher requirements on the performance and appearance of electronic devices. Usually, the shell of the electronic device is processed to make the electronic device have a good appearance. At present, the commonly used surface treatment process of the shell usually includes printing pattern + electroplating film layer + bottom cover ink, but the appearance effect that this process can present is limited. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a magnetic ink, a diaphragm, a method for manufacturing the diaphragm, a housing and an electronic device.

[0004] According to a first aspect of the present disclosure, a magnetic ink is provided. The magnetic ink includes magnetic particles. The magnetic particles include an insulating layer and magnetic toner. The magnetic toner is accommodated in an accommodation space formed by the insulating layer.

[0005] In some embodiments of the present disclosure, the ratio between the mass of the magnetic toner and the mass of the magnetic particles is 5%-50%.

[0006] In some embodiments of the present disclosure, the ratio of the total mass of the magnetic particles to the total mass of the magnetic ink is 0.05%-20%.

[0007] In some embodiments of the present disclosure, the particle size of the magnetic particles is 5 μm-30 μm.

[0008] In some embodiments of the present disclosure, the magnetic toner includes a magnetic metal, or the magnetic toner includes a magnetic metal and a non-magnetic metal.

[0009] In some embodiments of the present disclosure, the material of the magnetic metal includes one or more of iron, cobalt, nickel, and iron alloy;

[0010] The non-magnetic metal material includes one or more of magnesium, aluminum, zinc, silver, tin, lead, gold, and copper.

[0011] In some embodiments of the present disclosure, the insulating layer is light-transmissive.

[0012] According to a second aspect of the present disclosure, there is provided a diaphragm, the diaphragm comprising:

[0013] a light-transmitting substrate layer;

[0014] A magnetic ink layer, the magnetic ink layer covers the light-transmitting substrate layer; wherein the magnetic ink layer is formed by coating with magnetic ink, the magnetic ink comprises magnetic particles, the magnetic particles comprise an insulating layer and magnetic toner, the magnetic toner is accommodated in an accommodating space formed by the insulating layer; the magnetic particles in the magnetic ink layer form a pattern;

[0015] A decorative layer, the decorative layer covering the magnetic ink layer;

[0016] A cover bottom layer covers the decorative layer.

[0017] In some embodiments of the present disclosure, the magnetic ink layer includes a plurality of stacked sub-film layers, the mass percentage of the magnetic particles in the magnetic ink forming each sub-film layer is different, and / or the preset patterns formed by the magnetic particles in each sub-film layer are different, and the preset patterns formed by the plurality of sub-film layers form the pattern.

[0018] In some embodiments of the present disclosure, the thickness of the magnetic ink layer is 5 μm-30 μm.

[0019] In some embodiments of the present disclosure, the decoration layer includes a pattern layer and an electroplating layer which are stacked, and the cover bottom layer covers the electroplating layer.

[0020] In some embodiments of the present disclosure, the insulating layer is light-transmissive.

[0021] According to a third aspect of the present disclosure, a method for manufacturing a diaphragm is provided, the method for manufacturing the diaphragm comprising:

[0022] providing a light-transmitting substrate layer;

[0023] Applying magnetic ink on the surface of the light-transmitting substrate layer, and performing a preset treatment on the magnetic ink to form a magnetic ink layer with a pattern; wherein the magnetic ink comprises magnetic particles, the magnetic particles comprise an insulating layer and magnetic toner, and the magnetic toner is contained in a containing space formed by the insulating layer;

[0024] forming a decorative layer on the surface of the magnetic ink layer;

[0025] A cover layer is formed on the surface of the decoration layer.

[0026] In some embodiments of the present disclosure, the magnetic ink is subjected to a preset process to form a magnetic ink layer having a pattern, including:

[0027] Placing the light-transmitting substrate layer coated with the magnetic ink in a magnetic fixture, and under a preset magnetic field provided by the magnetic fixture, the magnetic particles in the magnetic ink form the pattern;

[0028] Under preset conditions, the light-transmitting substrate layer formed with the pattern is cured to transform the magnetic ink into a magnetic ink layer.

[0029] In some embodiments of the present disclosure, when the curing process includes a thermal curing process, the thermal curing process includes a first curing process and a second curing process performed sequentially, and when the first curing process is performed, the light-transmitting substrate layer formed with the pattern remains in the magnetic fixture;

[0030] The preset conditions corresponding to the first curing process include: a curing temperature of 50° C.-120° C., a curing time of 4 min-7 min; and / or,

[0031] The preset conditions corresponding to the second curing process include: a curing temperature of 50° C.-120° C., and a curing time of 0.5 h-2 h.

[0032] According to a fourth aspect of the present disclosure, a shell is provided, the shell comprising a light-transmitting body and the film provided by the second aspect of the present disclosure, the light-transmitting substrate layer of the film being bonded to the light-transmitting body.

[0033] According to a fifth aspect of the present disclosure, an electronic device is provided, and the electronic device includes the housing provided by the fourth aspect of the present disclosure.

[0034] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: in the magnetic ink provided by the present disclosure, since the magnetic toner is contained in the containing space formed by the insulating layer to form magnetic particles, the magnetic particles have good stability. When the magnetic particles are coated on the shell and applied to the electronic device, since the magnetic particles can be arranged in a magnetic field environment to form a pattern, the electronic device can have a good appearance effect, and can reduce the interference of the magnetic ink on the antenna, sensor and other devices in the electronic device, so as to ensure that the electronic device has good performance.

[0035] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0037] Figure 1 is a schematic structural diagram of a magnetic particle according to an exemplary embodiment.

[0038] Figure 2 is a schematic structural diagram of a diaphragm according to an exemplary embodiment.

[0039] Figure 3 is a flow chart of a method for manufacturing a membrane according to an exemplary embodiment.

[0040] Figure 4 is a schematic structural diagram of a housing according to an exemplary embodiment. DETAILED DESCRIPTION

[0041] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0042] With the development of science and technology and the popularization of electronic devices, users have higher and higher requirements on the performance and appearance of electronic devices. Usually, the shell of the electronic device is processed to make the electronic device have a good appearance. In the related technology, the commonly used surface treatment process of the shell usually includes printing pattern + electroplating film layer + bottom cover ink, but the appearance effect that this process can present is limited.

[0043] In the related art, a ferrite film layer is deposited on the surface of particles with a glittering effect such as pearl powder or silver powder to form magnetic powder, and the magnetic powder is added to ink to form magnetic ink, which is coated on a diaphragm to make a shell, so that the shell and the electronic device equipped with the shell have a good glittering effect. However, since the ferrite film layer in the magnetic powder is distributed on the surface of the particles, the magnetism of the ferrite can easily interfere with the antenna, sensor and other devices in the electronic device, affecting the normal use of the electronic device. Secondly, the structure of this magnetic powder is unstable, and there is a risk of the ferrite film layer falling off during the mixing and coating process of the magnetic ink, resulting in some particles not being magnetic and causing the formed pattern to not meet expectations, affecting the final appearance.

[0044] In view of this, the present disclosure provides a magnetic ink, which includes magnetic particles, the magnetic particles include an insulating layer and a magnetic toner, and the magnetic toner is contained in a containing space formed by the insulating layer. Since the magnetic toner is contained in the containing space formed by the insulating layer to form magnetic particles, the magnetic particles have good stability. Since the magnetic particles can be arranged to form a pattern in a magnetic field environment, when the magnetic particles are coated on a shell and applied to an electronic device, the electronic device can have a good appearance effect, and the interference of the magnetic ink on the antenna, sensor and other devices in the electronic device can be reduced to ensure that the electronic device has good performance.

[0045] An exemplary embodiment of the present disclosure provides a magnetic ink, which may include magnetic particles and an ink body, and the ink body may include components such as resin, active agent, and auxiliary agent, and a plurality of magnetic particles are mixed in the ink body to form the magnetic ink. When the magnetic ink is in a liquid state, the ink body serves as a dispersed phase of the magnetic particles, so that the magnetic particles can flow in the ink body under a magnetic field environment to arrange and form a pre-set pattern. After the magnetic particles form a pattern, the ink body in the magnetic ink can be cured, and the components in the ink body react to fix the position of the magnetic particles, so that the magnetic particles can still be arranged according to the pattern when out of the magnetic field environment, so that the magnetic ink can provide a good appearance effect. It is understood that the ink body should be transparent or translucent to avoid covering the color or gloss of the magnetic particles. The ink body may include a thermosetting resin or a light-curing resin, which can be selected based on demand. Exemplarily, the ink body may be composed of one or more resins of polyester, polyurethane, and polyacrylic acid, as well as materials such as a curing agent, an auxiliary agent, and a diluent.

[0046] refer to Figure 1 As shown, Figure 1 1 is a schematic diagram of the structure of a magnetic particle according to an exemplary embodiment. The magnetic particle includes an insulating layer 10 and a magnetic toner 20. The magnetic toner 20 is contained in a containing space 11 formed by the insulating layer 10. The insulating layer 10 is used to provide a containing space 11 to contain the magnetic toner 20. The insulating layer 10 covers the magnetic toner 20. Since the insulating layer 10 has insulating properties, it can weaken part of the magnetism of the magnetic toner 20 to reduce or avoid electromagnetic interference caused by the magnetic ink to the device on the electronic device when the magnetic ink is applied to the electronic device. At the same time, the insulating layer 10 covers the magnetic toner 20, so that the formed magnetic particles have a stable structure, which prevents the magnetic toner 20 from leaking and dispersing in the magnetic ink, causing electromagnetic interference to the device.

[0047] It should be noted that the insulating layer 10 may have a glitter effect or not, and the insulating layer 10 may be an opaque, translucent or transparent material. It is understandable that the color of the insulating layer 10 may be selected based on the desired appearance effect. For example, when the insulating layer 10 is a translucent or transparent material, it is not necessarily a colorless material, and may also be a transparent or translucent material of other colors such as pink, blue, yellow, etc.

[0048] In some examples, when the insulating layer 10 is an opaque material, the insulating layer 10 itself may have a pearlescent effect or a glittering effect, so that the magnetic particles can be arranged to form a pattern under a magnetic field environment, and the pearlescent effect of the insulating layer 10 provides good color and gloss for the magnetic ink. In some examples, when the insulating layer 10 is a translucent material, the insulating layer 10 itself may have a pearlescent effect or a glittering effect, and at least part of the gloss provided by the magnetic toner 20 may penetrate through the insulating layer 10, so that when the magnetic particles are arranged to form a pattern, the pearlescent effect of the insulating layer 10 and the gloss of the magnetic toner 20 provide good color and gloss for the magnetic ink.

[0049] In some examples, when the insulating layer 10 is a transparent material, the insulating layer 10 is light-transmissive, and the insulating layer 10 will not cover the color or gloss of the magnetic toner 20. The gloss of the magnetic toner 20 can fully penetrate the insulating layer 10, so that the magnetic particles can provide good color and gloss for the magnetic ink. At this time, the insulating layer 10 can be selected to have no glitter effect or have a glitter effect. Exemplarily, the material forming the light-transmissive insulating layer 10 can include, but is not limited to, materials such as silicon dioxide, polycarbonate, polyethylene terephthalate, polypropylene, polymethyl methacrylate, and polystyrene.

[0050] The magnetic toner 20 is used to provide magnetism and color to the magnetic particles. For example, it can be a metal powder with magnetism and metallic luster, such as nickel powder with silver metallic luster and magnetism. The magnetic toner 20 can also be a mixture of magnetic powder and other powders that are not magnetic but have metallic luster or have a glittering and colorful effect, such as iron powder and aluminum powder mixed to form the magnetic toner 20, or cobalt powder and gold powder mixed to form the magnetic toner 20, or iron alloy powder and pearl powder mixed to form the magnetic toner 20, etc. Since the magnetic toner 20 is accommodated in the accommodating space 11, based on the requirements of the pattern to be formed by the magnetic ink, any powder with color, pearl, or fluorescence can be set to mix with the magnetic metal powder with magnetism to form the magnetic toner 20, so that the magnetic particles have magnetism and the required color.

[0051] The disclosed embodiment does not limit the ratio of the total mass of magnetic particles to the total mass of magnetic ink (i.e., the mass percentage of magnetic particles), and can be selected and adjusted based on the requirements of appearance effect. When the mass percentage of magnetic particles is high, the flashing and colorful effect provided by magnetic ink is more intense and obvious. When the mass percentage of magnetic particles is low, the flashing and colorful effect provided by magnetic ink is relatively light.

[0052] In some examples, the mass percentage of magnetic particles in magnetic ink is controlled to be between 0.05% and 20%. When the mass percentage of magnetic particles is too low, magnetic ink cannot present a magical effect. When the mass percentage of magnetic particles is too high, devices in electronic devices are more susceptible to magnetic interference, and the pattern formed by the arrangement of magnetic particles is easily blurred, which results in a poor flashing and magical appearance of magnetic ink. In some examples, the mass percentage of magnetic particles in magnetic ink is between 1.5% and 20.0%. In some examples, the mass percentage of magnetic particles in magnetic ink is between 5% and 10%.

[0053] The particle size of the magnetic particles in the magnetic ink should be within a reasonable range. If the particle size is too small, it is easy to increase the production cost and difficulty of the magnetic particles, and the color or gloss presentation effect of the magnetic particles is poor; if the particle size is too large, the roughness of the flashing and colorful effect provided by the magnetic particles increases, and the amount of magnetic toner 20 in the magnetic particles needs to be increased, and the devices in the electronic equipment are more susceptible to magnetic interference. At the same time, the particle size of the magnetic particles should be relatively uniform, that is, the difference between the upper and lower limits of the particle size should be small, so as to avoid uneven gloss effect provided by the magnetic particles, affecting the final appearance of the magnetic ink. In some examples, the particle size of the magnetic particles can be between 5μm-30μm. For example, based on the demand for gloss, the particle size of the magnetic particles can be between 5μm-10μm, or between 10μm-20μm, or between 20μm-30μm, so that the magnetic ink presents different gloss effects.

[0054] refer to Figure 1 As shown, in the magnetic particles, the mass of the magnetic toner 20 should be controlled within a reasonable range. If the mass ratio of the magnetic toner 20 to the magnetic particles is too small, that is, the amount of the magnetic toner 20 in the magnetic particles is too small, the gloss of the magnetic particles is not obvious, and the magnetism of the magnetic particles may be too small to be arranged in a magnetic field environment to form a pattern. If the mass ratio of the magnetic toner 20 to the magnetic particles is too large, the magnetism of the magnetic particles is easily increased, and the devices in the electronic device are more susceptible to magnetic interference. In some examples, in the magnetic particles, the ratio between the mass of the magnetic toner 20 and the mass of the magnetic particles is 5%-50%. In some examples, the ratio between the mass of the magnetic toner 20 and the mass of the magnetic particles is 5%-30%. In some examples, the ratio between the mass of the magnetic toner 20 and the mass of the magnetic particles is 5%-25%.

[0055] In some examples, the magnetic toner 20 includes a magnetic metal. Since the metal has a special metallic luster, a large number of magnetic particles with magnetic metal can make the magnetic ink present a colorful effect with metallic luster, and the magnetic particles can also be arranged to form a pattern in a magnetic field environment. Exemplarily, the magnetic metal includes one or more of iron, cobalt, nickel, and iron alloys, wherein iron powder has a black metallic luster, cobalt powder has a black or gray metallic luster, nickel powder has a silvery white metallic luster, and iron alloys can present silvery white, black gray, and other metallic lusters based on the composition of the alloy. In one embodiment, if the magnetic toner 20 only includes magnetic metal, the mass proportion of the magnetic toner 20 in the magnetic particles can be controlled to be within a small range (e.g., not more than 30%) to reduce magnetic interference with devices in electronic devices.

[0056] In some examples, in order to reduce the magnetic interference caused by the magnetic particles to the devices in the electronic device, the magnetic toner 20 can be a mixed powder including magnetic metal and non-magnetic metal. The magnetic metal is used to provide the magnetic particles with magnetism and partial gloss color, and the non-magnetic metal is used to provide the magnetic particles with main color and gloss, so that the magnetic particles have obvious metallic gloss, and their magnetism can be properly arranged to form a pattern in a magnetic field environment, without causing excessive magnetic interference to the devices in the electronic device.

[0057] Exemplarily, the non-magnetic metal includes one or more of magnesium, aluminum, zinc, silver, tin, lead, gold, and copper. Among them, magnesium powder has a silvery white metallic luster, aluminum powder has a silvery white or silver-gray metallic luster, zinc powder has a light gray metallic luster, silver powder has a black-gray metallic luster, tin powder has a gray-green metallic luster, gold powder has a golden yellow metallic luster, and copper powder has a dark brown metallic luster. Lead powder has a blue-gray metallic luster. Since its surface is easily oxidized to form lead oxide, the lead powder can present gray-black, gray-green, yellow-green and other colors. Based on the gloss color that the magnetic particles need to present, a non-magnetic metal powder can be arbitrarily selected or a plurality of non-magnetic metal powders can be combined to be mixed with the magnetic metal powder to form the magnetic toner 20.

[0058] In some examples, reference Figure 1 As shown, in the magnetic particles, the material forming the insulating layer 10 includes silicon dioxide, the mass percentage of the insulating layer 10 in the magnetic particles is 75wt%-80wt%, and the mass percentage of the magnetic toner 20 in the magnetic particles is 20wt%-25wt%. The material forming the magnetic toner 20 includes aluminum powder, nickel powder and iron powder, wherein the mass percentage of the aluminum powder in the magnetic particles is 10wt%-15wt%, the mass percentage of the nickel powder in the magnetic particles is 3wt%-5wt%, and the mass percentage of the iron powder in the magnetic particles is 1wt%-3wt%.

[0059] In an exemplary embodiment, the present disclosure also provides a diaphragm, referring to Figure 1 and Figure 2 As shown, the film 100 includes a light-transmitting substrate layer 101, a magnetic ink layer 102, a decorative layer 103 and a cover bottom layer 104. Since the magnetic particles in the magnetic ink layer 102 have a good flashing and colorful effect and can form a pattern of a preset shape, when the film 100 is attached to the shell substrate of the electronic device, the shell with the film 100 can present a flashing and colorful effect with a certain pattern, thereby improving the user experience.

[0060] The light-transmitting substrate layer 101 is the main material of the film 100, and serves as a carrier of the magnetic ink layer 102, the decorative layer 103, and the cover layer 104. The light-transmitting substrate layer 101 has light-transmitting properties, so that the color and gloss of the magnetic particles in the magnetic ink layer 102 can pass through the light-transmitting substrate layer 101 to reach the human eye. The light-transmitting substrate layer 101 can be a sheet-like substrate, and the forming material can include, for example, a plastic substrate with good light transmittance and mechanical strength such as PET (Polyethylene terephthalate), PC (Polycarbonate), etc.

[0061] The magnetic ink layer 102 covers the light-transmitting substrate layer 101, for example, it can cover one side surface or multiple side surfaces of the light-transmitting substrate layer 101, so as to be attached to the light-transmitting substrate layer 101. Figure 2 As shown, the magnetic ink layer 102 covers one side surface of the light-transmitting substrate layer 101. The magnetic ink layer 102 includes magnetic ink, and the magnetic ink can be, for example, the magnetic ink provided in the above embodiment of the present disclosure. Since the magnetic ink includes magnetic toner 20 contained in the containing space 11 formed by the insulating layer 10 to form magnetic particles, under a preset magnetic field environment, the magnetic particles in the magnetic ink can be arranged to form a pattern pre-designed by technicians. Alternatively, the magnetic particles can also be freely arranged to form a pattern. Since the magnetic particles have a certain color and gloss, the pattern formed in the magnetic ink layer 102 has a special glossy and colorful effect. Since the magnetic toner 20 is coated by the insulating layer 10, the magnetism of the magnetic particles can be arranged to form a pattern in a magnetic field environment just right, and the pattern has a significant metallic luster, and does not cause excessive magnetic interference to the devices in the electronic device. At the same time, the magnetic particles have a stable structure, and there will be no leaked magnetic toner 20 in the magnetic ink layer 102, thereby avoiding magnetic interference to the devices in the electronic device. Of course, it is understandable that the magnetic ink layer 102 can be formed by coating one or more layers of magnetic ink. Based on the pattern to be presented, the mass percentage of magnetic particles in the magnetic inks coated multiple times can be different, or the color of the magnetic particles can be different, and so on.

[0062] It is understood that, in one embodiment, the insulating layer 10 may have a glitter effect or not, and the insulating layer 10 may be an opaque, translucent or transparent material. In some examples, the insulating layer 10 may be light-transmissive, and the insulating layer 10 will not cover the color or gloss of the magnetic toner 20. The gloss of the magnetic toner 20 can fully penetrate the insulating layer 10, so that the pattern formed by the magnetic particles in the magnetic ink has good color and gloss.

[0063] In some examples, the thickness of the magnetic ink layer 102 is between 5 μm and 30 μm. If the thickness of the magnetic ink layer 102 is too small, the amount of magnetic ink applied is small, so that the pattern formed by the magnetic particles in the magnetic ink layer 102 is not obvious, and the glossy and colorful effect is weak. If the thickness of the magnetic ink layer 102 is too large, the amount of magnetic ink applied is large, and there are more magnetic particles in the magnetic ink layer 102, which is easy to increase the magnetic interference caused by the magnetic ink layer 102 to the devices in the electronic device. At the same time, if the thickness of the magnetic ink layer 102 is too large, the thickness and mass of the diaphragm 100 will increase, which is easy to increase the thickness and weight of the electronic device, which is not conducive to the lightness of the electronic device.

[0064] Since the pattern needs to be presented in the magnetic ink layer 102 through magnetic particles, the main body of the ink in the magnetic ink forming the magnetic ink layer 102 should be transparent or translucent to avoid blocking the gloss or color of the magnetic particles. Since the main bodies of the inks in the light-transmitting substrate layer 101 and the magnetic ink layer 102 are both transparent, the appearance of the diaphragm 100 is relatively monotonous. Therefore, a decorative layer 103 is covered on the surface of the magnetic ink layer 102. The decorative layer 103 provides a base color or other patterns for the diaphragm 100 to enrich the appearance of the diaphragm 100. The decorative layer 103 can be a layer of pigment ink formed by coating to provide color, or a layer of pattern formed by processes such as silk screen printing, printing, and transfer printing, or a layer of electroplated film formed by electroplating to provide dense metallic color, and so on.

[0065] The bottom cover layer 104 covers the decorative layer 103. The bottom cover layer 104 is used to protect the decorative layer 103 and the magnetic ink layer 102. The bottom cover layer 104 is a light-proof layer so that the finally formed film 100 can present a stable and good pattern, color and gloss. The bottom cover layer 104 can be formed by spraying or printing with a specific ink. In order to ensure the reliability of the film 100, multiple layers of ink can be printed or sprayed to form the bottom cover layer 104.

[0066] In some examples, reference Figure 2As shown, the decorative layer 103 includes a pattern layer 1031 and an electroplating layer 1032, and the pattern layer 1031 covers the magnetic ink layer 102. The pattern layer 1031 can be a pattern formed by using pigment ink as a raw material through a printing process such as transfer, pad printing, and silk screen printing, and the pattern layer 1031 provides a bottom layer pattern for the magnetic ink layer 102. Exemplarily, the bottom layer pattern of the pattern layer 1031 can be matched with the pattern formed by the magnetic particles in the magnetic ink layer 102, so that the diaphragm 100 presents a better appearance effect.

[0067] The electroplating layer 1032 covers the pattern layer 1031, and the electroplating layer 1032 can provide color for the diaphragm 100, so that the diaphragm 100 can present a certain color effect when light is transmitted from the light-transmitting substrate layer 101, the magnetic ink layer 102 and the pattern layer 1031. The electroplating layer 1032 can be formed by resistive evaporation plating, magnetron sputtering plating or electron gun evaporation plating. In the process of forming the electroplating layer 1032, by using different electroplating raw materials, the electroplating layer 1032 can present black titanium, titanium gold, big gold, champagne gold, rose gold, yellow bronze, wine red, brown, coffee color, sapphire blue, emerald green and other colors. The cover bottom layer 104 covers the electroplating layer 1032, that is, the cover bottom layer 104 does not contact the pattern layer 1031, so as to prevent the electroplating layer 1032 from absorbing and reflecting the light and preventing it from reaching the pattern layer 1031, so as to ensure that the diaphragm 100 can present the pattern formed in the pattern layer 1031.

[0068] In some examples, the magnetic ink layer 102 includes a plurality of stacked sub-film layers, and a sub-film layer is formed after a layer of magnetic ink is coated and solidified. That is to say, the magnetic ink layer 102 is formed by multiple coatings of magnetic ink, and the magnetic ink in each sub-film layer can present a specific preset pattern, so that the pattern finally presented by the magnetic ink layer 102 is composed of a combination of preset patterns in multiple sub-film layers, so that the pattern finally presented by the magnetic ink layer 102 has a sense of layering and three-dimensionality.

[0069] In the multiple sub-film layers of the magnetic ink layer 102, the mass percentage of magnetic particles in the magnetic ink forming each sub-film layer can be different. For example, when the magnetic ink layer 102 includes 3 sub-film layers, the mass percentage of magnetic particles in the magnetic ink of the sub-film layer closest to the light-transmitting substrate layer 101 can be 2.5%, the mass percentage of magnetic particles in the magnetic ink of the sub-film layer formed subsequently can be 5%, and the mass percentage of magnetic particles in the magnetic ink of the sub-film layer formed last can be 10%, so that the magnetic ink layer 102 finally presents a pattern from shallow to deep with a sense of hierarchy and three-dimensionality. The above is only an example. In the actually formed diaphragm 100, the mass percentage of magnetic particles in each sub-film layer in the magnetic ink layer 102 can be set based on actual needs.

[0070] The preset patterns formed by the magnetic particles in each of the multiple sub-film layers of the magnetic ink layer 102 may be different. For example, when the final pattern to be formed by the magnetic ink layer 102 is a tree, and the magnetic ink layer 102 includes three sub-film layers, the preset pattern formed by the magnetic particles in the sub-film layer closest to the light-transmitting substrate layer 101 may be a tree crown, the preset pattern formed by the magnetic particles in the subsequently formed sub-film layer may be a tree branch, and the preset pattern formed by the magnetic particles in the last formed sub-film layer may be a tree trunk, so that the tree pattern presented by the combination of the tree crown, tree branches and tree trunk in the three sub-film layers has a sense of hierarchy and three-dimensionality.

[0071] It can be understood that in the magnetic ink layer 102, the mass percentage of the magnetic particles in the magnetic ink forming each sub-film layer can be different, the preset patterns formed by the magnetic particles in each sub-film layer can be different, the particle size of the magnetic particles in each sub-film layer can be different, and the color presented by the magnetic particles in each sub-film layer can also be different, so that the color, three-dimensional effect, rendering effect, etc. of the pattern presented by the magnetic ink layer 102 meet the requirements.

[0072] An exemplary embodiment of the present disclosure further provides a method for manufacturing a diaphragm, the method for manufacturing a diaphragm is used to manufacture the diaphragm provided in the above embodiment of the present disclosure, referring to Figure 3 As shown, the method for making the diaphragm comprises the following steps:

[0073] Step S100, providing a light-transmitting substrate layer;

[0074] Step S200, applying magnetic ink to the surface of the light-transmitting substrate layer, and performing a preset treatment on the magnetic ink to form a magnetic ink layer with a pattern; wherein the magnetic ink includes magnetic particles, the magnetic particles include an insulating layer and magnetic toner, and the magnetic toner is contained in a containing space formed by the insulating layer;

[0075] Step S300, forming a decorative layer on the surface of the magnetic ink layer;

[0076] Step S400: forming a cover layer on the surface of the decoration layer.

[0077] In step S100, refer to Figure 2 As shown, the light-transmitting substrate layer 101 is the main material of the film 100, and serves as a carrier of the magnetic ink layer 102, the decorative layer 103, and the cover layer 104. The light-transmitting substrate layer 101 is transparent, that is, it has light transmittance, so that the color and gloss in the magnetic ink layer 102 can pass through the light-transmitting substrate layer 101 to reach the human eye. The light-transmitting substrate layer 101 can be a sheet substrate, and the forming material can include, for example, a plastic substrate such as PET, PC, etc. with good light transmittance and mechanical strength.

[0078] In step S200, continue to refer to Figure 2 , using magnetic ink as a raw material, the magnetic ink is applied to the surface of the light-transmitting substrate layer 101 by pad printing, screen printing, spraying and other processes. In some examples, since the magnetic ink includes magnetic particles and the magnetic particles have a certain particle size, before the magnetic ink is applied to the light-transmitting substrate layer 101, the magnetic ink is first filtered to remove the magnetic particles with larger particle sizes in the magnetic ink, so as to ensure that the presentation effect of the pattern formed in the magnetic ink layer 102 is better. In other examples, the magnetic ink can be applied to the surface of the light-transmitting substrate layer 101 by screen printing. Since the screen printing process uses a screen for printing, the screen has a certain mesh number, and the screen can also play a role in filtering the magnetic ink to avoid magnetic particles with larger particle sizes from staying in the magnetic ink layer 102. Exemplarily, when the screen used in the screen printing process is about 200 meshes, the magnetic particles in the magnetic ink layer 102 can be less than 30μm, and the thickness of the magnetic ink layer 102 formed by curing the magnetic ink is about 7μm. It is understandable that the mesh number used when forming the magnetic ink layer 102 is not limited in the present disclosure and can be selected based on actual needs.

[0079] After the magnetic ink is applied to the light-transmitting substrate layer 101, the magnetic ink is subjected to a preset treatment, and the preset treatment may be a curing treatment of the magnetic ink so that the magnetic particles in the magnetic ink form a freely arranged pattern. In some examples, since the magnetic ink includes magnetic particles, the preset treatment may be, for example, transferring the light-transmitting substrate layer 101 coated with the magnetic ink to a preset magnetic field environment and curing the magnetic ink so that the magnetic particles form a pattern under the preset magnetic field environment. Since in the magnetic ink layer 102, the magnetic toner is accommodated in the accommodation space formed by the insulating layer to form a structure of magnetic particles, the pattern formed in the magnetic ink layer 102 has a significant metallic luster and does not cause excessive magnetic interference to the devices in the electronic device.

[0080] In step S300, refer to Figure 2 , since the decorative layer 103 provides a base color or pattern for the diaphragm 100, the appearance of the diaphragm 100 is enriched. In some examples, when forming the decorative layer 103, ink or pigment can be used as a raw material, and at least one process such as offset printing, silk screen printing, pad printing, and transfer printing can be performed on the surface of the magnetic ink layer 102 to form a decorative layer 103 with a bottom surface pattern on the surface of the magnetic ink layer 102. In other examples, electroplating raw materials can also be used to perform an electroplating process on the surface of the magnetic ink layer 102 to form a color with a bright effect on the surface of the magnetic ink layer 102 to form the decorative layer 103. In other examples, a pattern and an electroplated color layer can be sequentially formed on the surface of the magnetic ink layer 102 to form the decorative layer 103.

[0081] In step S400 , the cover bottom layer 104 may be formed by spraying or printing a specific ink for multiple times. The cover bottom layer 104 is used to protect the decoration layer 103 and the magnetic ink layer 102 .

[0082] In an exemplary embodiment, in step S200 of the method for manufacturing the diaphragm provided in the above embodiment, the magnetic ink is subjected to a preset process to form a magnetic ink layer having a pattern, including:

[0083] Step S210, placing the light-transmitting substrate layer coated with magnetic ink in a magnetic fixture, and under a preset magnetic field provided by the magnetic fixture, the magnetic particles in the magnetic ink form a pattern;

[0084] Step S220: Under preset conditions, the light-transmitting substrate layer with the pattern is cured to transform the magnetic ink into a magnetic ink layer.

[0085] In this embodiment, magnets arranged in a certain way may be provided inside the magnetic jig so that the magnetic jig can provide a preset magnetic field. A structure for accommodating or limiting the light-transmitting substrate layer 101 may be provided in the magnetic jig. When the light-transmitting substrate layer 101 coated with magnetic ink is placed in the magnetic jig, since the magnetic ink is still in a liquid or gel state, the magnetic particles in the magnetic ink can move and arrange under the preset magnetic field to form a pattern corresponding to the preset magnetic field. In other words, the pattern formed by the magnetic particles in the magnetic ink layer 102 is arranged based on the preset magnetic field provided by the magnetic jig.

[0086] At this time, since the magnetic ink is still in a liquid or gel state, even though the magnetic particles form a pattern under the preset magnetic field, if the light-transmitting substrate layer 101 is removed from the magnetic fixture and the magnetic ink is cured, the magnetic particles that have been separated from the preset magnetic field are likely to deviate from the trajectory corresponding to the desired pattern. Therefore, the light-transmitting substrate layer 101 with a pattern should be cured under the preset magnetic field environment provided by the magnetic fixture to solidify the magnetic ink, that is, the ink body in the magnetic ink fixes the position of the magnetic particles to form a magnetic ink layer 102 with a pattern.

[0087] The preset condition may be a condition for curing the magnetic ink, and the preset condition may be determined based on the main body of the ink in the magnetic ink. For example, when the main body of the ink in the magnetic ink is a photocurable ink, the preset condition may be to irradiate the light-transmitting substrate layer 101 in the magnetic jig with a light source of a specific wavelength corresponding to the main body of the ink, so that the magnetic ink is cured. For example, when the main body of the ink in the magnetic ink is a thermosetting ink, the preset condition may be to heat the light-transmitting substrate layer 101 in the magnetic jig under a certain temperature condition for a certain period of time, so that the magnetic ink is cured.

[0088] It is understandable that, since the arrangement of magnets inside different magnetic jigs may be different, that is, different magnetic jigs provide different preset magnetic fields, the patterns formed by different magnetic jigs are also different. When the magnetic ink layer 102 includes multiple sub-film layers, and the preset patterns formed by the magnetic particles in each sub-film layer are different, a different magnetic jig is required for each sub-film layer, and the magnetic ink corresponding to each sub-film layer must be cured before the next sub-film layer can be made, so as to avoid the magnetic jig used in the subsequent formation of the sub-film layer affecting the preset pattern in the previously formed sub-film layer.

[0089] In some possible embodiments, when the curing treatment of the magnetic ink includes a thermal curing treatment, that is, when the main body of the ink in the magnetic ink is a thermal curing ink, since it takes a long time for the thermal curing ink to be completely cured, if the light-transmitting substrate layer 101 is always kept in the magnetic fixture for curing treatment, the magnetic fixture will be occupied for a long time, resulting in a waste of production resources. Therefore, the curing treatment is set to be a first curing treatment and a second curing treatment performed in sequence. The first curing treatment can dry the thermal curing magnetic ink in a short time, that is, the thermal curing magnetic ink is changed from a flowable state to a non-flowable state, so that the magnetic particles in the magnetic ink maintain the arrangement of the pattern to be formed. When performing the first curing treatment, since it is necessary to change the thermal curing magnetic ink from a flowable state to a non-flowable state, the magnetic ink still needs to be processed in the environment of a preset magnetic field, so the light-transmitting substrate layer 101 formed with a preset pattern needs to stay in the magnetic fixture so that the magnetic particles maintain the arrangement of the pattern to be formed. The preset conditions corresponding to the first curing treatment may include: a curing temperature between 50°C and 120°C, and a curing time between 4min and 7min. The first curing treatment may, for example, use a heating lamp to irradiate the magnetic ink on the light-transmitting substrate layer 101 in the magnetic fixture.

[0090] After the first curing treatment is completed, the light-transmitting substrate layer 101 can be removed from the magnetic fixture, and the magnetic particles will not move, but the thermosetting magnetic ink is not completely cured and formed, and the magnetic ink is completely cured and formed through the second curing treatment to form the magnetic ink layer 102. The preset conditions corresponding to the second curing treatment may include: a curing temperature between 50°C and 120°C, and a curing time between 0.5h and 2h. For example, the second curing treatment may place the light-transmitting substrate layer 101 in a heating furnace or a tunnel furnace for heating.

[0091] By setting the curing process to be the first curing process and the second curing process performed sequentially, the time occupied by the magnetic jig when the heat-curing magnetic ink forms the magnetic ink layer 102 can be shortened. At the same time, when the magnetic ink layer 102 includes multiple sub-film layers, each sub-film layer can be immediately coated with the next sub-film layer after completing the first curing process, and after the last coated sub-film layer completes the first curing process, all sub-film layers are subjected to the second curing process, so as to save the time required to form the magnetic ink layer 102 including multiple sub-film layers, thereby saving time costs.

[0092] In an exemplary embodiment, reference Figure 4 As shown, the present disclosure provides a shell 200, which can be used as the outer shell of an electronic device such as a mobile phone, a tablet computer, and a watch. The shell 200 includes a light-transmitting body 201 and a diaphragm 100. The diaphragm 100 can be the diaphragm 100 provided in the above-mentioned embodiment of the present disclosure, or it can be the diaphragm 100 manufactured by the manufacturing method provided in the above-mentioned embodiment. Since the magnetic particles in the magnetic ink layer 102 in the diaphragm 100 have a stable structure, the magnetic toner is accommodated in the accommodation space formed by the insulating layer, so that the pattern formed by the magnetic particles has obvious gloss and fantasy effect, and does not cause excessive magnetic interference to the devices in the electronic device. When the shell 200 cooperates with the electronic device, it can provide the electronic device with a good flashing fantasy appearance effect without affecting the operating performance of each device in the electronic device.

[0093] The light-transmitting body 201 is the main structure constituting the shell 200. The light-transmitting body 201 can be formed of materials such as glass, plastic, transparent glass fiber composite material, etc., so that the light-transmitting body 201 has light transmittance. In order to make the shell 200 present a pattern with a magical luster, the light-transmitting substrate layer 101 of the diaphragm 100 is arranged to be bonded to the light-transmitting body 201, and the glossy pattern formed by the magnetic particles in the magnetic ink layer 102 can penetrate the light-transmitting substrate layer 101 and the light-transmitting body 201 to reach the human eye. At this time, the cover bottom layer 104 of the diaphragm 100 is away from the bonding surface between the diaphragm 100 and the light-transmitting body 201 to avoid the light being blocked by the cover bottom layer 104 after penetrating the light-transmitting body 201, so as to avoid causing the shell 200 to fail to present a glossy pattern.

[0094] In an exemplary embodiment, the present disclosure further provides an electronic device, which may be a mobile phone, a tablet computer, a sports bracelet, a watch, or other device. The electronic device includes a shell provided by the above-mentioned embodiment of the present disclosure, and the shell can be used as the back shell of the electronic device, close to the battery of the electronic device. When the shell is combined with the electronic device, the bottom cover layer in the shell is close to the battery of the electronic device, and the light-transmitting body of the shell serves as the appearance surface contacted by the user, so that during use, light can penetrate the light-transmitting body of the shell, and the user can visually see the pattern with a magical glossy feeling presented by the magnetic ink layer in the shell, so that the appearance effect of the electronic device meets the needs of the user. In addition, since the magnetic particles in the shell have a stable structure and the magnetic toner is contained in the containing space formed by the insulating layer, the magnetic particles will not cause excessive magnetic interference to the devices in the electronic device, ensuring that each device in the electronic device has good operating performance.

[0095] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0096] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A magnetic ink, characterized in that: The magnetic ink includes magnetic particles, the magnetic particles include an insulating layer and magnetic toner, and the magnetic toner is accommodated in an accommodating space formed by the insulating layer.

2. The magnetic ink according to claim 1, characterized in that: The ratio between the mass of the magnetic toner and the mass of the magnetic particles is 5% to 50%.

3. The magnetic ink according to claim 1, characterized in that: The ratio of the total mass of the magnetic particles to the total mass of the magnetic ink is 0.05%-20%.

4. The magnetic ink according to claim 1, characterized in that: The particle size of the magnetic particles is 5 μm-30 μm.

5. The magnetic ink according to claim 1, characterized in that: The magnetic toner includes a magnetic metal, or the magnetic toner includes a magnetic metal and a non-magnetic metal.

6. The magnetic ink according to claim 5, characterized in that: The magnetic metal includes one or more of iron, cobalt, nickel, and iron alloy; The non-magnetic metal includes one or more of magnesium, aluminum, zinc, silver, tin, lead, gold, and copper.

7. The magnetic ink according to any one of claims 1 to 6, characterized in that: The insulating layer is light-transmissive.

8. A diaphragm, characterized in that: The diaphragm comprises: a light-transmitting substrate layer; A magnetic ink layer, the magnetic ink layer covers the light-transmitting substrate layer; wherein the magnetic ink layer comprises magnetic ink, the magnetic ink comprises magnetic particles, the magnetic particles comprise an insulating layer and magnetic toner, the magnetic toner is accommodated in an accommodating space formed by the insulating layer; the magnetic particles in the magnetic ink layer form a pattern; A decorative layer, the decorative layer covering the magnetic ink layer; A cover bottom layer covers the decorative layer.

9. The diaphragm according to claim 8, characterized in that The magnetic ink layer includes a plurality of stacked sub-film layers, the mass percentage of the magnetic particles in the magnetic ink forming each sub-film layer is different, and / or the preset patterns formed by the magnetic particles in each sub-film layer are different, and the preset patterns formed by the plurality of sub-film layers form the pattern.

10. The diaphragm according to claim 8, characterized in that The thickness of the magnetic ink layer is 5 μm-30 μm.

11. The diaphragm according to claim 8, characterized in that The decoration layer comprises a pattern layer and an electroplating layer which are stacked, and the cover bottom layer covers the electroplating layer.

12. The diaphragm according to any one of claims 8 to 11, characterized in that: The insulating layer is light-transmissive.

13. A method for manufacturing a diaphragm, characterized in that: The method for making the diaphragm comprises: providing a light-transmitting substrate layer; Applying magnetic ink on the surface of the light-transmitting substrate layer, and performing a preset treatment on the magnetic ink to form a magnetic ink layer with a pattern; wherein the magnetic ink comprises magnetic particles, the magnetic particles comprise an insulating layer and magnetic toner, and the magnetic toner is contained in a containing space formed by the insulating layer; forming a decorative layer on the surface of the magnetic ink layer; A cover layer is formed on the surface of the decoration layer.

14. The method for manufacturing a membrane according to claim 13, characterized in that: The magnetic ink is subjected to a pre-processing to form a magnetic ink layer having a pattern, comprising: Placing the light-transmitting substrate layer coated with the magnetic ink in a magnetic fixture, and under a preset magnetic field provided by the magnetic fixture, the magnetic particles in the magnetic ink form the pattern; Under preset conditions, the light-transmitting substrate layer formed with the pattern is cured to transform the magnetic ink into a magnetic ink layer.

15. The method for manufacturing a membrane according to claim 14, characterized in that: When the curing process includes a thermal curing process, the thermal curing process includes a first curing process and a second curing process performed sequentially, and when the first curing process is performed, the light-transmitting substrate layer formed with the pattern remains in the magnetic fixture; The preset conditions corresponding to the first curing process include: a curing temperature of 50° C.-120° C., a curing time of 4 min-7 min; and / or, The preset conditions corresponding to the second curing process include: a curing temperature of 50° C.-120° C., and a curing time of 0.5 h-2 h.

16. A housing, characterized in that: The housing comprises a light-transmitting body and the film as described in any one of claims 8 to 12, wherein the light-transmitting substrate layer of the film is bonded to the light-transmitting body.

17. An electronic device, characterized in that: The electronic device comprises the housing according to claim 16.

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