Metal shell and electronic terminal product
By setting a dye porous layer and a sealing layer on the frame and strip of the metal shell, the nanopores in the anodized film layer are used to adsorb dye particles to form a continuous and metallic three-dimensional decorative pattern, which solves the problem of poor metal surface decoration effect in the prior art, and achieves a high-resolution, continuous and intact metal shell decoration effect.
Patent Information
- Application Number
- CN202420652303.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-03-29
AI Technical Summary
When the prior art realizes the decoration of the metal surface graphic text, it covers the metallic luster of the metal itself, the color layer is not coherent enough, and the visual effect is poor. Especially when decoration of complex metal structures, exposure development technology causes heavy shadows at the junction of the color layer, and the transition is unnatural.
A metal shell design with dye decorative layers on multiple surfaces is designed. By setting a dye porous layer and a sealing layer on the frames and strips of the metal matrix, dye particles are adsorbed using nanopores in the anodized film layer to form a continuous and metallic three-dimensional decorative pattern.
The multi-faceted continuous decoration of the metal shell is realized, with clear patterns and high resolution. The overall visual sensory effect of the metal shell is significantly improved, avoiding the problems of ghosting and unnatural transition in the prior art.
Smart Images
Figure CN222736400U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mobile terminals, and in particular to a metal shell and an electronic terminal product having the metal shell. Background Art
[0002] With the popularity of mobile terminals such as mobile phones, consumers have more and more requirements for the appearance and texture of mobile terminals. For example, a shell with metallic luster and color is more eye-catching. Therefore, it is very important to enhance the decorative effect and overall visual effect of terminal products.
[0003] At present, the process of realizing graphic decoration on metal surface is to first spray the metal surface to form a coating, and then use the coating to absorb thermal sublimation ink to transfer the graphics to the metal surface. However, the above method covers the metal luster of the metal itself, and the color layer is not coherent enough, and the visual effect is poor. If complex metal structures are to be decorated at the same time, the current process includes the following steps: ① Spraying a photosensitive coating on the surface of the metal substrate; ② Partially shielding and exposing the front, side and back end faces of the shell respectively; ③ Using developer chemicals to remove the photosensitive coating in the shielding area to achieve local shielding; ④ Using anodizing to decorate and color the unshielded area; ⑤ De-plating the partially shielded coating; ⑥ Performing secondary anodizing decoration in the shielding area. The color layer obtained by the above method has a smooth edge, but due to the use of exposure and development technology, double images will appear at the junction of the color layers, and the transition is unnatural, affecting the visual effect. Utility Model Content
[0004] The utility model aims to provide a metal shell with a plurality of surfaces all having dye decorative layers.
[0005] In order to achieve the above-mentioned purpose, the first aspect of the utility model provides a metal shell, which includes a metal substrate, and the metal substrate includes a bottom plate, a frame arranged around the bottom plate, and a baffle arranged on the end surface of the frame away from the bottom plate; a dye decorative layer is provided on at least part of the frame and at least part of the baffle.
[0006] Optionally, the dye decoration layer includes a dye porous layer covered on the metal substrate and a sealing layer covered on the dye porous layer.
[0007] Optionally, the dye porous layer comprises an anodized film layer; the anodized film layer has nanopores, and the nanopores are filled with dye particles.
[0008] Optionally, the dye decoration layer includes a first continuous monochrome color block, which includes a first continuous decorative area located on the block strip and a second continuous decorative area located on the frame; the dyes in the dye particles of the first decorative area and the second decorative area are the same.
[0009] Optionally, the first continuous monochrome color block further includes a third decorative area located on the bottom plate, the third decorative area is connected to the second decorative area; and the dyes in the dye particles of the third decorative area and the second decorative area are the same.
[0010] Optionally, the dye decoration layer also includes a second continuous monochrome color block, the dye particles of the second continuous monochrome color block are different from those of the first continuous monochrome color block; the second continuous monochrome color block includes a fourth decorative area continuously located on the gear strip and a fifth decorative area located on the frame; the dyes in the dye particles of the fourth decorative area and the fifth decorative area are the same.
[0011] Optionally, a boundary line between the first decorative area and the fourth decorative area and a boundary line between the second decorative area and the fifth decorative area are both corrugated lines.
[0012] Optionally, the corrugated lines have uniform and continuous protrusions; the width (d1) of the protrusions perpendicular to the extension direction of the corrugated lines is 20-50 μm; the width (d2) of the protrusions parallel to the extension direction of the corrugated lines is 20-120 μm.
[0013] Optionally, the resolution of the dye decoration layer is above 300 dpi.
[0014] Optionally, the fourth decorative area is adjacent to the first decorative area, and the fifth decorative area is adjacent to the second decorative area; the intersection of a boundary line between the fourth decorative area and the first decorative area and a boundary line between the block strip and the frame is used as a first intersection; the intersection of a boundary line between the fifth decorative area and the second decorative area and a boundary line between the block strip and the frame is used as a second intersection; the distance between the first intersection and the second intersection is less than 20 μm.
[0015] Optionally, the second continuous single-color color block further includes a sixth decorative area located on the bottom plate adjacent to the fifth decorative area; the dyes in the dye particles of the sixth decorative area and the fifth decorative area are the same.
[0016] Optionally, the metal matrix is one of an aluminum alloy matrix, a magnesium alloy matrix, a steel matrix and a titanium alloy matrix.
[0017] A second aspect of the utility model provides an electronic terminal product, the electronic terminal product having the aforementioned metal shell.
[0018] Through the above technical scheme, the utility model provides a metal shell having a dye decorative layer on the frame and the guard bar. The above dye decorative layer is a decorative pattern with a metallic texture formed simultaneously on multiple surfaces of the metal shell by gas dyeing, has a three-dimensional graphic effect, and the patterns on multiple surfaces are continuous and intact, and the overall visual sensory effect of the metal shell is good.
[0019] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:
[0021] Figure 1 It is a schematic diagram of the structure of the metal shell provided in some embodiments of the utility model.
[0022] Figure 2 yes Figure 1 A schematic diagram of the structure of the metal shell in another direction is shown.
[0023] Figure 3 for Figure 1 A partial enlarged view of the junction between the first continuous single-color block and the second continuous single-color block in the pattern on the metal shell.
[0024] Figure 4 for Figure 1 A partial enlarged view of the pattern on the metal shell shown.
[0025] Figure 5 A partial schematic diagram of a pattern on a metal shell provided in the prior art.
[0026] Description of reference numerals:
[0027] 100. Metal shell; 110. Bottom plate; 111. Third decorative area; 112. Sixth decorative area; 120. Frame; 121. Second decorative area; 122. Fifth decorative area; 130. Baffle; 131. First decorative area; 132. Fourth decorative area; 134. Boundary between baffle and frame; 135. Boundary between first decorative area and fourth decorative area; 136. Boundary between second decorative area and fifth decorative area. DETAILED DESCRIPTION
[0028] The specific implementation of the present invention is described in detail below. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0029] The utility model provides a metal shell, which can be applied to terminal products with three-dimensional graphic decoration requirements, including but not limited to electronic terminal products such as mobile phones, laptops, tablet computers, watches, cameras, monitoring equipment, AR equipment or VR equipment.
[0030] refer to Figure 1 to Figure 2 The metal shell shown in the following description is taken as the shell of a mobile phone as an example. The metal shell includes a metal base 100, which includes a bottom plate 110, a frame 120 arranged around the bottom plate 110, and a stop bar 130 arranged on the end surface of the frame 120 away from the bottom plate 110.
[0031] The frame 120 and the stop bar 130 are at least partially provided with a dye decoration layer. Specifically, in some embodiments, the metal substrate 100 can be one of an aluminum alloy substrate, a magnesium alloy substrate, a steel substrate and a titanium alloy substrate, and the dye decoration layer forms a three-dimensional decorative pattern with a metallic texture on the surface of the metal substrate.
[0032] Specifically, in some embodiments, the dye decoration layer includes a dye porous layer covering the metal substrate and a sealing layer covering the dye porous layer, wherein the dye porous layer includes an anodic oxide film layer; the anodic oxide film layer has nanopores, the nanopores are filled with dye particles, the dye particles are adsorbed by the nanopores and then sealed in the nanopores by the porous layer to form a decorative pattern. In some preferred embodiments, the dye is an azo dye, the thermal sublimation temperature of the azo dye is 100-200°C, the molecular diameter of the dye particles is less than or equal to 5nm, the dye particles can be adsorbed by the nanopores in the anodic oxide film layer, and can make the metal shell present a three-dimensional decorative pattern with uniform color and high resolution.
[0033] In some embodiments, the dye decoration layer includes at least a first continuous monochrome color block, and the first continuous monochrome color block can present a three-dimensional and metallic color on the surface of the metal shell, such as Figure 1 and Figure 2 As shown, the first continuous monochrome color block includes a first decorative area 131 located on the stop bar and a second decorative area 121 located on the frame. The dyes in the dye particles of the first decorative area 131 and the second decorative area 121 are the same, so that the first decorative area 131 and the second decorative area 121 present continuous and uniform colors. It can be understood that the dyes in the dye particles are the same means that the colors of the dyes are the same.
[0034] Specifically, in some embodiments, reference Figure 2 The first continuous monochrome color block also includes a third decorative area 111 located on the bottom plate 110, the third decorative area 111 is connected to the second decorative area 121, the dye in the dye particles of the third decorative area 111 and the second decorative area 121 is the same, that is, the dye color in the dye particles of the third decorative area 111 and the second decorative area 121 is the same, and the third decorative area 111 is adjacent to the second decorative area 121 to form a continuous pattern. The first continuous monochrome color block is at least partially arranged on the bottom plate 110, the frame 120 and the stop bar 130 of the metal shell, which enriches the decorative effect of the metal shell and enhances the appearance of the shell.
[0035] The decorative pattern of the dye decorative layer of the metal shell may also have multiple decorative colors, and the dye decorative layer also includes a second continuous monochrome color block, and the dye particles of the second continuous monochrome color block are different from the first continuous monochrome color block. In this way, the dye particles in the first continuous monochrome color block and the second continuous monochrome color block have different colors. Figure 3 As shown, the second continuous monochrome color block includes a fourth decorative area 132 located on the stop bar and a fifth decorative area 122 located on the frame, wherein the dyes in the dye particles of the fourth decorative area 132 and the fifth decorative area 122 are the same, and the colors of the dyes in the fourth decorative area 132 and the fifth decorative area 122 are the same, so as to form a continuous pattern. Specifically, the fourth decorative area 132 is adjacent to the first decorative area 131, and the fifth decorative area 122 is adjacent to the second decorative area 121; the intersection of the boundary line 135 between the fourth decorative area 132 and the first decorative area 131 and the boundary line 134 between the stop bar and the frame is taken as the first intersection; the intersection of the boundary line 136 between the fifth decorative area 122 and the second decorative area 121 and the boundary line between the stop bar and the frame is taken as the second intersection; the distance between the first intersection and the second intersection is less than 20μm. In this way, a dye decoration layer with at least two different colors is formed on the baffle and frame of the metal shell, and the pattern in the dye decoration layer extends from the frame to the baffle (or from the baffle to the frame) without disconnection, missing or interlacing.
[0036] Since the above-mentioned decorative layer is prepared by a thermal transfer method, the desired pattern is first printed on an elastic transfer film using digital printing technology, and then transferred to the above-mentioned metal shell. There is no need for multiple exposure and development. The boundaries between the color blocks of different dyes in the dye decorative layer are clear, and a variety of color pattern decorations can be achieved on the metal shell. In some embodiments, the boundary line between the first decorative area and the fourth decorative area and the boundary line between the second decorative area and the fifth decorative area are both corrugated lines. Specifically, the corrugated line has uniform and continuous protrusions. Taking the boundary line between the first continuous monochrome color block and the second continuous monochrome color block on the gear bar as an example, please refer to Figure 4 The width of the protrusion perpendicular to the extension direction of the corrugation line (d1) is 20-50 μm; the width of the protrusion parallel to the extension direction of the corrugation line (d2) is 20-120 μm. Since the protrusions of the corrugation line are uniform in size, the visual sensory effect presented by the continuous pattern is better.
[0037] Figure 5 A partial schematic diagram of a pattern on a metal shell provided by the prior art, such as Figure 5 As shown, the boundary edge between the first continuous monochrome color block and the second continuous monochrome color block is smooth, but due to technical problems existing in the exposure and development itself, a double image will appear at the junction (as shown in the box), and the transition is unnatural.
[0038] Specifically, the pattern of the dye decoration layer is clear. For example, in some embodiments, the resolution of the dye decoration layer is above 300 dpi. Figure 2 As shown, the second continuous monochrome color block also includes a sixth decorative area 112 located on the bottom plate adjacent to the fifth decorative area 122, and the dyes in the dye particles of the sixth decorative area 112 and the fifth decorative area 122 are the same, that is, the sixth decorative area 112 and the fifth decorative area 122 have dye particles of the same color. In some other embodiments, the dye decoration layer may also include a monochrome color block whose dye particles are different from those of the first continuous monochrome color block and the second continuous monochrome color block, for example, a color painting, and can form a continuous pattern on the bottom plate, the frame and the stop bar.
[0039] A method for preparing a metal shell, the method comprising the following steps:
[0040] Anodizing the metal shell substrate to obtain a substrate having an anodized layer; the metal shell substrate includes a bottom plate, a frame and a stop bar; the anodized layer has nanopores;
[0041] Placing an elastic transfer film printed with a pattern on a substrate having an anodized layer so that the elastic transfer film covers the bottom plate, the frame and the stop bar to obtain a film-attached substrate; the elastic transfer film comprises an elastic base film, a carrier film loaded on the elastic base film and a pattern printed on the carrier film using a dye;
[0042] Assembling the film-laminated substrate in a mold and performing vacuuming to make the elastic transfer film printed with the pattern closely fit with the substrate having the anodized layer, thereby obtaining a pattern-laminated substrate;
[0043] Thermally transfer the pattern-laminated substrate to obtain a transferred substrate;
[0044] The transferred substrate is peeled off and the holes are sealed.
[0045] Preferably, the conditions for the anodizing treatment include: using the metal shell substrate as the anode and performing anodizing treatment in a sulfuric acid solution; the conditions for the anodizing treatment include: voltage of 8-15V; sulfuric acid concentration of 100-200g / L; time of 30-60min; temperature of 20-30°C.
[0046] In some embodiments, the elastic base film has a high stretchability and can cover the bottom plate, the frame and the stop bar at the same time. Specifically, the elastic base film is a PET film.
[0047] In some embodiments, the carrier film is used to store dyes. Preferably, the carrier film is a PVA film layer. The thermal sublimation dye is printed on the PVA film layer by a digital printer. During the thermal transfer process, the dye stored on the PVA film layer is adsorbed by the nanopores on the surface of the metal shell substrate, forming a clear and continuous pattern on the bottom plate, frame and guard bar of the metal shell.
[0048] Specifically, the mold includes a profiling jig, a base and a frame. The profiling jig is used to profile the metal shell. During transfer, the metal shell can be placed on the profiling jig, and the elastic transfer film printed with a pattern is attached to the anodized layer of the metal shell. The base, the frame and the elastic transfer film can cooperate to form a closed space, and an exhaust air duct connected to a vacuum pump is provided on the base.
[0049] In some embodiments, when performing thermal transfer, the metal shell substrate is placed on a contoured jig, and then an elastic transfer film printed with a pattern is covered on the surface of the metal shell having an anodized layer, and the elastic transfer film is covered on all sides of the base substrate, the frame and the base are opposed to each other and pressure is applied to the frame or the base to make the frame and the base engage, the frame is sealed together with the base and the elastic transfer film to form a sealed structure, the mold is evacuated through an exhaust air duct provided on the base, and the mold is heated at the same time, the dye on the elastic transfer film is sublimated by the heat and adsorbed by the nanopores in the anodized layer of the metal shell, and the dye is sealed in the nanopores through sealing treatment.
[0050] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.
[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.
[0052] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.
Claims
1. A metal shell, characterized in that: The metal shell comprises a metal substrate (100), the metal substrate comprising a bottom plate (110), a frame (120) arranged around the bottom plate (110), and a stop bar (130) arranged on an end surface of the frame (120) away from the bottom plate (110); a dye decorative layer is arranged on at least part of the frame (120) and at least part of the stop bar (130).
2. The metal housing according to claim 1, characterized in that: The dye decoration layer comprises a dye porous layer covered on the metal substrate and a sealing layer covered on the dye porous layer.
3. The metal housing according to claim 2, characterized in that: The dye porous layer comprises an anodic oxide film layer; the anodic oxide film layer has nanopores, and the nanopores are filled with dye particles.
4. The metal housing according to claim 3, characterized in that: The dye decoration layer comprises a first continuous monochrome color block, wherein the first continuous monochrome color block comprises a first decoration area (131) continuously located on the stop strip and a second decoration area (121) located on the frame; the dyes in the dye particles of the first decoration area (131) and the second decoration area (121) are the same.
5. The metal housing according to claim 4, characterized in that: The first continuous monochrome color block also includes a third decorative area (111) located on the base plate, wherein the third decorative area (111) is connected to the second decorative area (121); the dyes in the dye particles of the third decorative area (111) and the second decorative area (121) are the same.
6. The metal housing according to claim 4 or 5, characterized in that: The dye decoration layer also includes a second continuous monochrome color block, the dye particles of the second continuous monochrome color block are different from those of the first continuous monochrome color block; the second continuous monochrome color block includes a fourth decoration area (132) continuously located on the gear strip and a fifth decoration area (122) located on the frame; the dyes in the dye particles of the fourth decoration area (132) and the fifth decoration area (122) are the same.
7. The metal housing according to claim 6, characterized in that: The boundary line between the first decorative area (131) and the fourth decorative area (132) and the boundary line between the second decorative area (121) and the fifth decorative area (122) are both corrugated lines.
8. The metal housing according to claim 7, characterized in that: The corrugated lines have uniform and continuous protrusions; the width (d1) of the protrusions perpendicular to the extension direction of the corrugated lines is 20-50 μm; the width (d2) of the protrusions parallel to the extension direction of the corrugated lines is 20-120 μm.
9. The metal housing according to claim 4, characterized in that: The resolution of the dye decoration layer is above 300 dpi.
10. The metal housing according to claim 6, characterized in that: The fourth decorative area (132) is adjacent to the first decorative area (131), and the fifth decorative area (122) is adjacent to the second decorative area (121); an intersection point between a boundary line between the fourth decorative area (132) and the first decorative area (131) and a boundary line between the gear strip (130) and the frame (120) is used as a first intersection point; The intersection point of the boundary line between the fifth decorative area (122) and the second decorative area (121) and the boundary line between the gear strip (130) and the frame (120) is used as the second intersection point; The distance between the first intersection and the second intersection is less than 20 μm.
11. The metal housing according to claim 6, characterized in that: The second continuous monochrome color block also includes a sixth decorative area (112) located on the base plate adjacent to the fifth decorative area (122); the dyes in the dye particles of the sixth decorative area (112) and the fifth decorative area (122) are the same.
12. The metal housing according to claim 1, characterized in that: The metal matrix (100) is one of an aluminum alloy matrix, a magnesium alloy matrix, a steel matrix and a titanium alloy matrix.
13. An electronic terminal product, characterized in that: The electronic terminal product comprises the metal shell according to any one of claims 1-12.