Medical equipment shell manufacturing method and medical equipment shell

Abstract

The invention relates to the technical field of medical equipment manufacturing, and discloses a medical equipment shell manufacturing method and a medical equipment shell. The method comprises the steps that a surface treatment structure is manufactured on a base material to obtain the medical equipment shell, and the surface treatment structure comprises a pattern layer, a middle color layer and a bottom color layer which are stacked in sequence; the pattern layer is visible on the outer surface of the medical equipment shell; when the pattern layer needs to present a light-color dominant pattern, the bright-color ink layer is firstly printed, and then the dark-color ink layer is printed; when the pattern layer needs to present a deep-color dominant pattern, the deep-color ink layer is firstly printed, and then the light-color ink layer is printed; and when the pattern layer needs to present the neutral color pattern, determining the printing sequence of the target color and the reference color based on the contrast difference between the target color and the reference color of the pattern layer. Through an imaging mechanism with multi-path reflected light superposition and optical interference / mixing, the optical phenomenon of superposition of color information at different depth positions in a real space is simulated on a two-dimensional plane, and the visual depth sense and the richness of hierarchical change are remarkably enhanced.

Description

Technical Field

[0001] This invention relates to the field of medical device manufacturing technology, and in particular to a method for manufacturing a medical device housing and a medical device housing. Background Technology

[0002] In the current medical device manufacturing field, the visual appeal of product appearance has become a key factor in enhancing market competitiveness. In related technologies, surface decoration commonly employs spraying or screen printing processes to achieve color, pattern, and texture effects. These processes are widely used in consumer electronics, home appliances, and automobiles. However, these processes only create a planar color or texture layer on the outermost layer of the product, resulting in a two-dimensional visual effect lacking visual depth and rich layering. As consumers' demands for quality continue to rise, the two-dimensional visual effect of planar color or texture layers presented by traditional processes has certain limitations. Therefore, overcoming the bottleneck of the lack of visual depth and rich layering in planar color or texture layers presented by related technologies, and developing processing solutions capable of presenting a three-dimensional visual effect, is particularly important. Summary of the Invention

[0003] Based on this, in response to the technical problem that the planar color or texture layers presented by related technologies lack visual depth and rich layer variations, this application proposes a method for manufacturing a medical device housing and a medical device housing.

[0004] In a first aspect, this application proposes a method for manufacturing a medical device housing, the method comprising: Provide base materials; A surface-treated structure is fabricated on the substrate to obtain a medical device housing, wherein the surface-treated structure includes a pattern layer, an intermediate color layer and a base color layer stacked sequentially, and the pattern layer is visible on the outer surface of the medical device housing; When creating the pattern layer: When the pattern layer visible on the outer surface of the medical device housing needs to present a light-colored dominant pattern, the light-colored ink layer is printed first, followed by the dark-colored ink layer. When the pattern layer visible on the outer surface of the medical device housing needs to present a dark dominant pattern, the dark ink layer is printed first and then the light ink layer is printed. When the pattern layer visible on the outer surface of the medical device housing needs to present a neutral color pattern, the printing order of the target color and the reference color is determined based on the contrast difference between the target color and the reference color of the pattern layer.

[0005] Furthermore, when the pattern layer visible on the outer surface of the medical device housing needs to present a neutral color pattern, the contrast difference ΔE between the target color and the reference color of the pattern layer is calculated using the CIELAB color space; when |ΔE|≥5, the color with the highest contrast between the target color and the reference color is used as the first printed color, and the color with the lowest contrast between the target color and the reference color is used as the second printed color.

[0006] Furthermore, the steps for creating the pattern layer include: A first carrier is provided, and a dark sub-layer of the pattern layer and a light sub-layer of the pattern layer are sequentially fabricated on the first carrier to obtain a transferable pattern decoration. A second carrier is provided, on which a dark texture sublayer and a light texture sublayer of the pattern layer are fabricated to obtain a transferable texture decoration; Based on the UV transfer printing process, the transferable pattern decoration is transferred onto the first surface of the first substrate; Based on the UV transfer printing process, the transferable texture decoration is transferred to the surface of the transferable pattern decoration on the side away from the substrate.

[0007] Furthermore, the intermediate color layer is printed using a screen printing process, and / or the base color layer is printed using an ink printing process; The step of fabricating a surface-treated structure on the substrate to obtain a medical device housing further includes: Perform a pretreatment to increase adhesion in the target area of ​​the substrate; The surface treatment structure is fabricated in the pretreated target area to obtain the medical device housing.

[0008] Furthermore, the method also includes: producing a protective film for the medical device housing by immersion, spraying, or inkjet printing processes; The protective film is disposed in at least one of the following locations: The surface of the substrate that is away from the surface-treated structure; The first exposed area is the area on the first surface of the substrate that is not covered by the surface treatment structure. The exposed area of ​​the surface-treated structure.

[0009] Furthermore, the method further includes: fabricating an adhesive backing layer for the medical device housing, wherein the adhesive backing layer is located on the side of the base color layer away from the intermediate color layer, and the adhesive backing layer is in direct contact with the base color layer.

[0010] Secondly, this application also proposes a medical device housing, which is manufactured using the medical device housing manufacturing method described in the first aspect, and the medical device housing includes: a substrate and a surface treatment structure disposed on the substrate; The surface treatment structure includes a pattern layer, an intermediate color layer, and a base color layer stacked sequentially, and the pattern layer is visible on the outer surface of the medical device housing.

[0011] Furthermore, the pattern layer includes a pattern light-colored sub-layer, a pattern dark-colored sub-layer, a texture light-colored sub-layer, and a texture dark-colored sub-layer stacked sequentially, wherein the texture dark-colored sub-layer is located between the texture light-colored sub-layer and the intermediate color layer; The edge contour of the dark sub-layer of the pattern extends circumferentially beyond the corresponding light sub-layer of the pattern; The edge contour of the dark texture sublayer extends circumferentially beyond the corresponding light texture sublayer.

[0012] Furthermore, the medical device housing can be any of the following configurations: A first configuration, comprising sequentially the substrate, the pattern layer, the intermediate color layer, and the base color layer; The second configuration includes, in sequence, the substrate, the base color layer, the intermediate color layer, and the pattern layer; A third configuration, wherein the surface treatment structure is disposed between the two substrates.

[0013] Furthermore, the medical device housing also includes: a protective film; The protective film is disposed in at least one of the following locations: The first position is the surface of the substrate that is away from the surface-treated structure; The second position is the first exposed area, wherein the surface treatment structure is disposed on the first surface of the substrate, and the first exposed area is the area on the first surface of the substrate that is not covered by the surface treatment structure; The third position is the exposed area of ​​the surface-treated structure.

[0014] The medical device housing manufacturing method and the medical device housing of this application achieve the following technical effects: The surface treatment structure described in this application comprises a pattern layer, an intermediate color layer, and a base color layer stacked sequentially. Since the pattern layer is visible on the outer surface of the medical device housing, light first illuminates the pattern layer of the surface treatment structure. When light reaches the surface of the pattern layer, some light is reflected directly by the pattern layer itself, forming surface visual information. Simultaneously, another portion of the light penetrates the pattern layer, which has a certain degree of transparency, to reach the intermediate color layer. At the interface of the intermediate color layer, the light undergoes secondary reflection and selective absorption. The reflected light carries the characteristics of the intermediate color layer and propagates outward again. During this process, the reflected light from the intermediate color layer will optically superimpose and mix with the directly reflected light from the pattern layer and the color characteristics of the pattern layer itself. Furthermore, the light penetrating the intermediate color layer reaches the base color layer and is reflected by it, forming a third layer of light information, which is also perceived by the observer. Ultimately, the color and texture perceived by the observer are the result of the interaction, superposition, and mixing of the pattern layer, the reflected light from the intermediate color layer, and the reflected light from the base color layer after multiple layers of transmission / reflection. This imaging mechanism involves multi-path reflected light superposition and optical interference / mixing. It simulates the optical phenomenon of color information superposition at different depth positions in real space on a two-dimensional plane, thus effectively breaking through the optical limitations of a single color layer or texture layer, and significantly enhancing the visual depth and the richness of layering. When creating pattern layers, the printing order is adjusted according to the dominant color type to be presented: for light-colored dominant patterns, the light ink layer is printed first, followed by the dark ink layer, making the light color stand out as a base and preventing the dark color from being too dark and causing the light color to be inconspicuous, thus ensuring the visual effect of light color dominance; for dark-colored dominant patterns, the dark ink layer is printed first, followed by the light ink layer, making the dark color as a base color more stable, preventing the light color from diluting the dominance of the dark color, and enhancing the richness of the dark color; for neutral color patterns, the printing order is determined based on the contrast difference between the target color and the reference color, which can accurately balance the tone and prevent any one color from being overemphasized, ensuring the balanced presentation of neutral colors; thus, this adjustment of the printing order can specifically optimize the color level and visual expression of patterns with different dominant color types, ensuring that the color of the pattern layer meets the design expectations and improving the color accuracy and aesthetics of the pattern on the surface of the medical device housing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] in: Figure 1 This is a schematic diagram of the exploded structure of a medical device housing in one embodiment; Figure 2 for Figure 1 A schematic diagram of the patterned layer structure of the medical device housing; Figure 3 for Figure 1 Another structural diagram of the medical device housing; Figure 4 This is a flowchart of a method for manufacturing a medical device housing in one embodiment; Figure 5 for Figure 4 A flowchart illustrating a method for manufacturing a medical device housing; Figure 6 for Figure 4 A flowchart illustrating a method for manufacturing a medical device housing; Figure 7 for Figure 4 A flowchart illustrating a method for manufacturing a medical device housing; Figure 8 for Figure 4 A flowchart illustrating a method for manufacturing a medical device housing.

[0017] Main component description: Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 This application provides a medical device housing, comprising: a substrate (1, 3) and a surface-treated structure disposed on the substrate (1, 3); The surface treatment structure includes a pattern layer 21, an intermediate color layer 22, and a base color layer 23 stacked sequentially, with the pattern layer 21 visible on the outer surface of the medical device housing.

[0020] The surface treatment structure in this embodiment includes a pattern layer 21, an intermediate color layer 22, and a base color layer 23 stacked sequentially. Since the pattern layer 21 is visible on the outer surface of the medical device housing, light first illuminates the pattern layer 21. When light reaches the surface of the pattern layer 21, some light is reflected by the pattern layer 21 itself, directly forming surface visual information. Simultaneously, another portion of the light penetrates the pattern layer 21, which has a certain degree of transparency, to reach the intermediate color layer 22. At the interface of the intermediate color layer 22, the light undergoes secondary reflection and selective absorption, and the reflected light carries the characteristics of the intermediate color layer 22 back towards the surface. During the outward propagation process, the reflected light from the intermediate color layer 22 will optically superimpose and mix with the directly reflected light from the pattern layer 21 and the color characteristics of the pattern layer 21 itself. Furthermore, the light penetrating the intermediate color layer 22 reaches the base color layer 23 and is reflected by it, forming a third layer of light information, which is also perceived by the observer. Ultimately, the color and texture perceived by the observer are the result of the interaction, superposition, and mixing of the reflected light from the pattern layer 21, the intermediate color layer 22, and the base color layer 23 after multiple layers of transmission / reflection. This imaging mechanism of multi-path reflected light superposition and optical interference / mixing simulates the optical phenomenon of color information superposition at different depth positions in real space on a two-dimensional plane, thereby effectively breaking through the optical limitations of a single color layer or texture layer and significantly enhancing the visual depth and richness of layer changes.

[0021] Optionally, the number of substrates may be one or two.

[0022] In some embodiments, the number of substrates for the medical device housing is one, and the substrate is located on the side of the pattern layer 21 away from the intermediate color layer 22. In this case, the substrate is made of transparent material, and the observer can observe the pattern layer 21 through the substrate.

[0023] In some embodiments, the number of substrates for the medical device housing is one, and the substrate is located on the side of the base color layer 23 away from the intermediate color layer 22. In this case, the substrate is any one of transparent material, non-transparent material, or transparent material combined with non-transparent material, and the observer directly observes the pattern layer 21.

[0024] In some embodiments, when the number of substrates of the medical device housing is two, including a first substrate and a second substrate, the first substrate is located on the side of the pattern layer 21 away from the intermediate color layer 22, and the second substrate is located on the side of the base color layer 23 away from the intermediate color layer 22. The first substrate is made of a transparent material, and an observer can observe the pattern layer 21 through the first substrate. The second substrate is made of any of the following materials: transparent material, non-transparent material, and a combination of transparent material and non-transparent material.

[0025] In some embodiments, the substrate is made of a transparent material; this transparent material includes, but is not limited to, PMMA, PC, a composite of PMMA and PC, and glass. The substrate formed by the composite of PMMA and PC maintains excellent transparency while possessing the surface hardness of hardened acrylic, preventing scratches on the surface of the medical device housing, and also exhibiting the better toughness of PC sheets. PMMA is acrylic or plexiglass. PC is polycarbonate, a polymer containing carbonate groups in its molecular chain.

[0026] In some embodiments, the substrate includes a non-transparent material, including but not limited to: metal, ceramic, wood, engineering plastics, and stone. Stone includes, but is not limited to, marble and granite. Optionally, the substrate located on the side of the pattern layer 21 away from the intermediate color layer 22 is shaped as a translucent sheet. This substrate needs to have excellent transparency; it can be fully transparent or semi-transparent, allowing an observer to view the pattern layer 21 through it.

[0027] The shape of the substrate located on the side of the base color layer 23 away from the intermediate color layer 22 can be sheet-like, column-like, etc., and is not limited here.

[0028] Optionally, the pattern layer 21 is made of UV ink, or printed using a screen printing process. UV stands for ultraviolet light curing. UV ink is a type of light-curing, single-component ink that is cured by ultraviolet light irradiation.

[0029] Optionally, the intermediate color layer 22 is printed using UV ink or screen printing. The intermediate color layer 22 can be adjusted to achieve different thicknesses or to add a subtle texture effect to the base color, resulting in a more three-dimensional overall effect.

[0030] Optionally, the base color layer 23 is printed with UV ink, or it is printed using a screen printing process. The base color layer 23 is designed to prevent the structure of the intermediate color layer 22 from affecting the observer's view of the pattern layer 21.

[0031] It is understandable that the ink used to create the surface treatment structure can be selected based on the material of the substrate.

[0032] In some embodiments, the substrate is glass, and the ink used to fabricate the surface-treated structure can be glass ink, such as glass UV ink or glass screen printing ink. This type of ink has good adhesion to glass, adhering firmly to the glass surface and resisting peeling. This allows for clear and durable pattern printing, withstands certain friction, chemical corrosion, and environmental factors, and its transparency matches the glass material well, maintaining the overall aesthetics of the medical device housing.

[0033] In some embodiments, the substrate is PC, and the surface-treated structure can be fabricated using PC-specific inks, such as UV-curable PC inks. This is because the surface of PC material is relatively smooth and has special chemical properties, allowing PC-specific inks to form good chemical bonds with the PC surface. PC-specific inks provide excellent abrasion resistance, making the printed pattern less prone to wear under frequent use or friction; PC-specific inks also have good chemical resistance, resisting the erosion of some common chemicals; and they dry quickly on the PC surface, improving production efficiency.

[0034] In some embodiments, the substrate is PMMA, and the ink used to create the surface treatment structure can be acrylic ink. Since PMMA itself is also an acrylic polymer, acrylic inks and PMMA substrates have certain similarities in chemical structure and are well compatible. Therefore, patterns printed with acrylic inks have high color vibrancy and can accurately reproduce the colors of the design. At the same time, these inks have good flexibility, are not prone to cracking under slight deformation of the PMMA substrate, and have strong adhesion to the PMMA substrate, ensuring the long-term stability of the printed surface treatment structure.

[0035] The color selection of intermediate color layer 22 and base color layer 23 should be combined with the visual requirements of the surface treatment structure, the overall style of the medical device housing, and the interlayer matching logic of the surface treatment structure. The specific principles are as follows: First, the intermediate color layer 22 mainly serves as a transition and connection. Its color needs to be coordinated or contrasted with the pattern layer 21 to enhance the sense of depth of the pattern layer 21. If the pattern layer 21 has a complex texture, a low-saturation color similar to the main color of the pattern can be selected to weaken the conflict. Among them, saturated colors include, but are not limited to, light gray and off-white. If it is necessary to highlight the pattern, a complementary color can be selected to strengthen the visual focus. It usually needs to have a certain degree of transparency to be compatible with the color overlay effect of the base color layer 23. Among them, the complementary color includes, but is not limited to, cool colors when the pattern is a warm color. Secondly, the base color layer 23, as the basic color tone, needs to provide a stable color base. The color selection needs to take into account both the opacity and the overall style: if the substrate is not transparent, a solid color with strong opacity should be selected to cover the color of the substrate itself. Among them, solid colors include, but are not limited to, black, white, and dark brown. If it is paired with the intermediate color layer 22, a darker color of the same color family as the intermediate color layer 22 can be selected to enhance the sense of depth, or a simple solid color can be selected according to the product positioning to highlight the main body of the pattern layer 21. Among them, dark colors include, but are not limited to, dark blue when the intermediate color is light blue, and solid colors include, but are not limited to, white and gray.

[0036] Optionally, the pattern layer 21 has a light transmittance of ≥70%, the intermediate color layer 22 has a refractive index of 1.5~1.6, and the base color layer 23 has a reflectance of ≥90%.

[0037] Please see Figure 2 In an optional embodiment, the pattern layer 21 includes a pattern light-colored sub-layer 211, a pattern dark-colored sub-layer 212, a texture light-colored sub-layer 213, and a texture dark-colored sub-layer 214 stacked sequentially, with the texture dark-colored sub-layer 214 located between the texture light-colored sub-layer 213 and the intermediate color layer 22. When light is incident on the outermost pattern light-colored sub-layer 211, its high reflectivity initially creates a bright base visual effect; simultaneously, some light penetrates the pattern light-colored sub-layer 211 and reaches the lower pattern dark-colored sub-layer 212. The strong absorption of light by the pattern dark-colored sub-layer 212 creates a deep dark outline in the pattern area. Thus, the pattern light-colored sub-layer 211 and the pattern dark-colored sub-layer 212 visually and precisely define the shape and boundary of the pattern through a strong contrast between light and dark; furthermore, the light penetrating the pattern dark-colored sub-layer 212 reaches the texture light-colored sub-layer 213, and its reflected light carries light-colored texture information and reflects upwards. At that time, because the dark texture sublayer 214 is adjacent to it and has a selective absorption and blocking effect on the transmitted light, the transmitted light of the light texture sublayer 213 can only effectively pass through the area not covered by the dark texture sublayer 214 during the process of passing through the dark texture sublayer 214. Thus, the fine lines or dots of the dark texture of the dark texture sublayer 214 are clearly outlined on the light texture sublayer 213. Finally, the light that passes through the light texture sublayer 213 and the dark texture sublayer 214 reaches the intermediate color layer 22 and is reflected. Its color information is superimposed with the light and dark contrast and texture details formed by the pattern layer 21 itself. This not only significantly enhances the three-dimensional contour of the pattern and the clarity and sharpness of the texture, but also creates rich light and dark gradations and spatial layers through the differential absorption, reflection and blocking effect of light by the light and dark sublayers. Finally, it simulates a three-dimensional visual effect with depth and layer changes on the two-dimensional surface, breaking the limitations of the planar representation of traditional single color layer or simple texture layer.

[0038] Optionally, after determining the design scheme, the design scheme is decomposed into a light-colored pattern sublayer 211, a dark-colored pattern sublayer 212, a light-colored texture sublayer 213, and a dark-colored texture sublayer 214. Finally, the molecular layer is made when making the pattern layer 21 based on the decomposition results.

[0039] Optionally, the textured dark sublayer 214 contains a thermochromic material, with a hue change ΔH≥30 in the range of 20℃~40℃, thereby breaking through the limitations of static layering and increasing interactive visual feedback.

[0040] In an optional embodiment, the edge contour of the pattern dark sublayer 212 extends circumferentially beyond the corresponding pattern light sublayer 211; the edge contour of the texture dark sublayer 214 extends circumferentially beyond the corresponding texture light sublayer 213.

[0041] The edge contour of the dark pattern sublayer 212 extends circumferentially beyond the corresponding light pattern sublayer 211 to form a dark pattern protruding edge; the edge contour of the dark texture sublayer 214 extends circumferentially beyond the corresponding light texture sublayer 213 to form a dark texture protruding edge.

[0042] When light shines on the surface of the medical device housing from different angles, at the junction of the pattern edge and the texture edge, the dark sublayer portion extending beyond the edge of the light sublayer forms a physical dark border or shadow area, which forms a protruding edge. For the pattern area, the protruding edge of the dark sublayer 212 visually completely surrounds the light sublayer 211, which makes the bright edge of the area where the light sublayer 211 is located framed and converged by the wider and deeper boundary of the dark sublayer 212, significantly suppressing the blurring or fuzziness of the edge in the area where the light sublayer 211 is located due to light scattering or visual spillover effects.

[0043] Meanwhile, in the textured area, the protruding edges of the dark texture sublayer 214 also surround the light texture sublayer 213. This not only has a similar "sharpening" effect on the edges of the area where the dark texture sublayer 214 is located, but more importantly, these protruding dark edges themselves will form realistic physical micro-shadows under illumination, especially under non-perpendicular incident light, due to their height difference. This micro-shadow, superimposed on the low reflectivity of the light texture sublayer 213 itself, creates a sense of "indentation" or "three-dimensional contour" with depth implications, similar to the natural formation of object edges, at the visual perception level. Ultimately, the synergistic effect of the border created by the physically protruding edges of the dark sublayer and the realistic physical micro-shadow enhances the visual clarity, sharpness, and boundary certainty of the pattern and texture edges on the one hand, and simulates a sense of depth and three-dimensional contour with a real physical basis in the originally two-dimensional layered structure edge area on the other hand, thus significantly improving the three-dimensional expressiveness and visual depth of the pattern and texture as a whole.

[0044] Optionally, the edge contour of the dark sub-layer 212 of the pattern extends beyond the corresponding light sub-layer 211 of the pattern by 0.1mm to 1mm in the circumferential direction, that is, the formed protruding edge is 0.1mm to 1mm. This length refers to the shortest distance between the edge contour of the dark sub-layer 212 of the pattern and the edge contour of the light sub-layer 211 of the pattern.

[0045] Optionally, the edge contour of the dark sub-layer 212 extends circumferentially beyond the corresponding light sub-layer 211 by 0.1mm to 0.5mm, that is, the formed protruding edge is 0.1mm to 0.5mm. This length refers to the shortest distance between the edge contour of the dark sub-layer 212 and the edge contour of the light sub-layer 211.

[0046] Optionally, the edge contour of the dark texture sub-layer 214 extends circumferentially beyond the corresponding light texture sub-layer 213 by 0.1mm to 1mm, that is, the formed protruding edge is 0.1mm to 1mm. This length refers to the shortest distance between the edge contour of the dark texture sub-layer 214 and the edge contour of the light texture sub-layer 213.

[0047] Optionally, the edge contour of the dark texture sub-layer 214 extends circumferentially beyond the corresponding light texture sub-layer 213 by 0.1mm to 0.5mm, that is, the formed protruding edge is 0.1mm to 0.5mm. This length refers to the shortest distance between the edge contour of the dark texture sub-layer 214 and the edge contour of the light texture sub-layer 213.

[0048] Please see Figure 1 In an optional embodiment, the medical device housing may be any of the following configurations: A first configuration, comprising, in sequence, the substrate, the pattern layer 21, the intermediate color layer 22, and the base color layer 23; The second configuration includes, in sequence, the substrate, the base color layer 23, the intermediate color layer 22, and the pattern layer 21; A third configuration, wherein the surface treatment structure is disposed between the two substrates.

[0049] The first and second configurations use a single substrate, while the third configuration uses two substrates.

[0050] In the first configuration, the observer observes the pattern layer 21 through the substrate. In the second configuration, the observer observes the pattern layer 21 directly. In the third configuration, the observer observes the pattern layer 21 through the substrate located away from the intermediate color layer 22.

[0051] Please see Figure 3 In an optional embodiment, the surface treatment structure further includes an adhesive layer 4; the adhesive layer 4 is located on the surface of the base color layer 23 away from the intermediate color layer 22, and the adhesive layer 4 is in direct contact with the base color layer 23. The adhesive layer 4 allows the medical device housing to be fixed to other components of the device.

[0052] Optionally, a coating process is used to form the adhesive backing layer 4. First, a suitable adhesive is selected, depending on the material of the area where the adhesive backing layer 4 needs to be formed on the medical device housing, the usage environment, etc. For example, if the material of the area where the adhesive backing layer 4 needs to be formed on the medical device housing is a plastic material, an acrylic adhesive might be chosen. Then, using specialized coating equipment, such as a blade coater or roller coater, the adhesive is evenly applied to the area of ​​the medical device housing where the adhesive backing layer 4 needs to be formed, controlling the thickness and uniformity of the coating. Afterward, a drying or curing process is performed to allow the adhesive to form a stable adhesive backing layer 4.

[0053] In an optional embodiment, when the configuration of the medical device housing includes a second or third configuration, the substrate located on the side of the base layer 23 away from the pattern layer 21 is made of metal, and an oxide film is provided on the exposed area of ​​the metal substrate that is not covered by the surface treatment structure. Because the oxide film is dense, it can effectively isolate the metal substrate from contact with air, moisture, and corrosive substances in the external environment, thereby preventing oxidation and corrosion of the metal substrate in the exposed area. This not only protects the structural integrity of the metal substrate and extends the service life of the medical device housing, but also avoids problems such as discoloration and mottled appearance caused by corrosion, ensuring the appearance coordination between the exposed metal area and the area covered by the surface treatment structure, thus improving the overall appearance stability and durability of the medical device housing.

[0054] The oxide film is formed by immersing a substrate made of metallic material in an acidic solution and then electrolyzing it.

[0055] Because the oxide film has a smooth surface and high chemical stability, it may affect the adhesion of the ink, causing the printed pattern to easily fall off. In this case, it is usually necessary to remove the oxide film to enhance the bonding force between the ink and the substrate made of metal material. Therefore, in an optional embodiment of this application, the substrate made of metal material is first immersed in an acidic solution for electrolysis, and then the oxide film in a designated area of ​​the substrate made of metal material is removed. Finally, the surface treatment structure is set in the designated area.

[0056] In an optional embodiment, the medical device housing further includes: a protective membrane; The protective film is disposed in at least one of the following locations: The first position is the surface of the substrate that is away from the surface-treated structure; The second position is the first exposed area, wherein the surface treatment structure is disposed on the first surface of the substrate, and the first exposed area is the area on the first surface of the substrate that is not covered by the surface treatment structure; The third position is the exposed area of ​​the surface-treated structure.

[0057] It is understood that the surface treatment structure is disposed on the first surface of the substrate, and the surface of the substrate away from the surface treatment structure refers to the second surface of the substrate, wherein one of the first surface and the second surface is the upper surface of the substrate, and the other surface of the first surface and the second surface is the lower surface of the substrate.

[0058] When a protective film is provided on the housing of a medical device, if the protective film covers the second surface of the substrate, it improves the hardness, acid and alkali resistance, and corrosion resistance of the second surface of the substrate, and also improves the hydrophobicity of the second surface of the substrate to water stains, liquid stains, blood stains, cleaning water marks, etc., reducing the surface from which dirt adheres.

[0059] If the protective film covers the first exposed area of ​​the first surface of the substrate, it can prevent the area from being contaminated or worn due to exposure. If the protective film is placed on the exposed area of ​​the surface treatment structure, it can prevent the pattern layer 21, intermediate color layer 22, base color layer 23 and other structures from being eroded or scratched by external factors, thus ensuring the integrity of the surface treatment structure and the clarity of the pattern.

[0060] Furthermore, when the medical device housing of this application is applied to equipment in the medical industry, the protective film protects the medical device housing. The area covered by the protective film is easy to clean and wipe, reducing the amount of cleaning agent used, saving cleaning time and improving cleaning efficiency. It also improves the surface hardness, acid and alkali resistance, and corrosion resistance of the area covered by the protective film, exhibiting good repellency to water stains, liquid stains, blood stains, and cleaning water marks, reducing the adhesion of contaminants to the surface of the area covered by the protective film, thereby reducing the risk of cross-infection during surgery.

[0061] In an optional embodiment, the protective film is a hydrophobic and oleophobic film.

[0062] A hydrophobic and oleophobic film is a thin film that repels water and oil. When a protective film is hydrophobic and oleophobic, its ability to repel water and oil reduces the adhesion of water and oil to the surface of the area covered by the film, making it easier to clean. Simultaneously, it prevents water and oil from penetrating and corroding the area covered by the film, further enhancing its protection and improving the surface durability and cleanliness of the covered area.

[0063] The formation of hydrophobic and oleophobic films is usually based on chemical modification or physical coating techniques on the material surface, mainly achieved by constructing micro-nano structures or chemical groups with low surface energy.

[0064] In an optional embodiment, the area of ​​the substrate not covered by the surface treatment structure is provided with at least one groove, and / or the area of ​​the substrate not covered by the surface treatment structure is provided with at least one protrusion.

[0065] At least one groove and / or protrusion is provided in the area of ​​the substrate not covered by the surface treatment structure. The groove can increase the assembly space of this area with other components, making it easier to embed connectors or functional components and improving the structural adaptability of the medical device housing. The protrusion can enhance the structural strength of this area, reduce the risk of deformation under external impact, and can also serve as a positioning mark or anti-slip structure to improve ease of use. In addition, the three-dimensional texture formed by the groove and protrusion can enrich the appearance of the medical device housing, making the area not covered by the surface treatment structure visually contrast with the covered area, enhancing the uniqueness of the overall design, and thus improving the appearance recognition and user experience of the product while ensuring structural functionality.

[0066] When using glass materials, the groove is created using one or more processes such as laser etching and chemical etching. Laser etching: This method uses a high-energy laser beam to locally vaporize the glass surface, achieving micron-level precision, suitable for forming fine grooves. Chemical etching: Also known as HF etching, this method uses a photoresist mask to protect the non-etched areas while etching the glass surface with a hydrofluoric acid solution. This can create deeper grooves, but the etching time must be controlled to avoid rough edges.

[0067] When using metallic materials, the groove is created using one or more of the following processes: machining, chemical etching, etc. Machining: Processes such as milling and turning remove material using cutting tools; suitable for larger grooves, but precision is limited by equipment. Shot blasting is suitable for smaller grooves. Chemical etching: Uses a strong acid solution to corrode the unmasked metal area; suitable for complex patterned grooves. The strong acid solution includes, but is not limited to, nitric acid and hydrochloric acid. Laser etching: Fast and efficient, capable of creating narrow and deep grooves, but may create a heat-affected zone.

[0068] When using PMMA material, the groove is created using one or more of the following processes: CNC engraving, laser cutting / engraving, and thermoforming. CNC engraving: The groove is milled using precision tools, resulting in smooth edges; suitable for small to medium batch production. Laser cutting / engraving: Thermal effects may cause slight melting at the edges; parameters need to be optimized to ensure accuracy. Thermoforming: The PMMA is heated in a mold to soften it, and the groove is pressed out using the mold's raised structure; suitable for mass production.

[0069] When using PC material, the groove is created using one or more of the following processes: CNC engraving, laser engraving, and injection molding. CNC engraving: Similar to PMMA, but note that PC has higher toughness, and the cutting tool must be sharp to avoid burrs. Laser engraving: Thermal effects may cause yellowing at the edges; power and speed need to be adjusted. Injection molding: A raised structure is designed in the mold, and the groove is directly formed during injection molding; suitable for mass production.

[0070] When using glass materials, the protrusion is created using one or more processes such as thermoforming, chemical deposition, etc. Thermoforming involves locally heating the glass to its softening point and then using a mold or air pressure to create a protrusion; precise temperature control is required. Chemical deposition involves depositing material onto the glass surface using chemical vapor deposition to form the protrusion, but the thickness is limited.

[0071] When using metallic materials, the protrusion is created using one or more processes such as stamping, 3D printing, and forging. Stamping: Pressure is applied to a metal sheet using a mold, causing it to plastically deform and form a protrusion; suitable for mass production. 3D printing: Also known as additive manufacturing, it involves layering metal material through laser cladding or electron beam melting; suitable for complex-shaped protrusions. Forging: Pressure is applied to a metal blank, causing it to plastically flow and forming a protrusion within a mold cavity; this method offers high strength.

[0072] When using PMMA material, the protrusion is created using one or more processes such as thermoforming, injection molding, or bonding / insertion. Thermoforming: Similar to the groove process, the protrusion is pressed out using a mold's recessed structure. Injection molding: A recessed structure is designed in the mold, and the protrusion is directly formed during injection molding. Bonding / insertion: The pre-made PMMA protrusion is fixed to the substrate surface using adhesive or mechanical means.

[0073] When using PC material, the protrusion is created using one or more processes such as injection molding, thermoforming, and 3D printing. Injection molding: A recessed structure is designed in the mold, and the protrusion is directly formed during injection, resulting in high efficiency. Thermoforming: The protrusion is pressed through a mold after heating the PC sheet, suitable for small to medium batch production. 3D printing: The protrusion is printed using fused deposition modeling or photopolymerization, suitable for rapid prototyping.

[0074] Please see Figure 4 This application also proposes a method for manufacturing a medical device housing, the method comprising: S1: Provide substrate; S2: A surface treatment structure is fabricated on the substrate to obtain a medical device housing, wherein the surface treatment structure includes a pattern layer 21, an intermediate color layer 22 and a base color layer 23 stacked sequentially, and the pattern layer 21 is visible on the outer surface of the medical device housing.

[0075] The surface treatment structure of this embodiment includes a pattern layer 21, an intermediate color layer 22, and a base color layer 23 stacked sequentially. Since the pattern layer 21 is visible on the outer surface of the medical device housing, light first illuminates the pattern layer 21 of the surface treatment structure. When the light shines on the surface of the pattern layer 21, some of the light is reflected by the pattern layer 21 itself to directly form surface visual information. At the same time, another part of the light penetrates the pattern layer 21, which has a certain degree of transparency, and reaches the intermediate color layer 22. At the interface of the intermediate color layer 22, the light undergoes secondary reflection and selective absorption, and the reflected light carries the characteristics of the intermediate color layer 22 and propagates outward again.

[0076] In this process, the reflected light from the intermediate color layer 22 will optically superimpose and mix with the directly reflected light from the pattern layer 21 and the color characteristics of the pattern layer 21 itself. Furthermore, the light that penetrates the intermediate color layer 22 reaches the base color layer 23 and is reflected by it, forming a third layer of light information, which is also perceived by the observer. Finally, the color and texture perceived by the observer are the effect of the interaction, superposition and mixing of the reflected light from the pattern layer 21, the intermediate color layer 22 and the base color layer 23 after multiple layers of transmission / reflection. This imaging mechanism of multi-path reflected light superposition and optical interference / mixing simulates the optical phenomenon of color information superposition at different depth positions in real space on a two-dimensional plane, thereby effectively breaking through the optical limitations of a single color layer or texture layer and significantly enhancing the visual depth and the richness of layer changes.

[0077] In an optional embodiment, when creating the pattern layer 21: When the pattern layer 21 visible on the outer surface of the medical device housing needs to present a light-colored dominant pattern, a light-colored ink layer is printed first, followed by a dark-colored ink layer. When the pattern layer 21 visible on the outer surface of the medical device housing needs to present a dark dominant pattern, the dark ink layer is printed first and then the light ink layer is printed. When the pattern layer 21 visible on the outer surface of the medical device housing needs to present a neutral color pattern, the printing order of the target color and the reference color is determined based on the contrast difference between the target color and the reference color of the pattern layer 21.

[0078] When creating pattern layer 21, the printing order is adjusted according to the dominant color type to be presented: for light-colored dominant patterns, the light ink layer is printed first, followed by the dark ink layer, making the light color stand out as a base and avoiding the light color from being indistinct due to excessive dark coverage, thus ensuring the visual effect of light color dominance; for dark-colored dominant patterns, the dark ink layer is printed first, followed by the light ink layer, making the dark color as a base color more stable, preventing the light color from diluting the dominance of the dark color, and enhancing the richness of the dark color; for neutral color patterns, the printing order is determined based on the contrast difference between the target color and the reference color, which can accurately balance the tone and avoid the overemphasis of a certain color, ensuring the balanced presentation of neutral colors; thus, the adjustment of this printing order can specifically optimize the color level and visual expression of patterns with different dominant color types, ensuring that the color of pattern layer 21 meets the design expectations and improving the color accuracy and aesthetics of the pattern on the surface of the medical device housing.

[0079] When a light-colored dominant pattern is required, processes such as screen printing, pad printing, or digital printing can be used. Taking screen printing as an example, first, the bright ink is accurately printed onto the substrate using a screen, and then dried by baking or air drying to ensure the ink adheres firmly. Then, dark ink is printed using a similar process. During drying, the temperature and time must be carefully controlled to prevent the ink from discoloring or cracking, ensuring that the bright base stands out and exhibits a clear light-colored dominant visual effect.

[0080] To present a predominantly dark pattern, techniques such as screen printing, pad printing, or digital printing can be used. First, dark ink is printed, and after it dries fully, lighter ink is printed. For example, in pad printing, dark ink is first transferred to the printing head and then precisely transferred to the substrate. After drying, the process is repeated to print lighter ink. This strengthens the dominant dark color, resulting in a richer and more layered pattern.

[0081] For neutral color patterns, the target color and reference color of pattern layer 21 must first be measured. The color values ​​of both are obtained using a color measuring instrument, including but not limited to a spectrophotometer, and the contrast difference is calculated based on these values. If the target color is brighter than the reference color, the reference color ink is printed first; otherwise, the target color ink is printed first. Digital printing can be used, leveraging its color control capabilities to adjust the ink jet volume and printing parameters based on the calculation results, achieving precise control over the neutral color pattern and ensuring color balance in the final presentation. In other words, the contrast difference in this application refers to the difference in color contrast.

[0082] In an optional embodiment, when the pattern layer 21 visible on the outer surface of the medical device housing needs to present a neutral color pattern, the contrast difference ΔE between the target color and the reference color of the pattern layer 21 is calculated using the CIELAB color space. When |ΔE|≥5, the color with the highest contrast between the target color and the reference color is selected as the first printed color, and the color with the lowest contrast between the target color and the reference color is selected as the second printed color. According to industrial practice, when |ΔE|≥5, it indicates that there is a significant visual difference between the two colors. In this case, the high-contrast color is preferentially selected for printing to ensure the pattern's recognizability.

[0083] It should be noted that |ΔE|≥5 is a general threshold for triggering high-contrast printing strategies, and the specific value can be adjusted according to product requirements.

[0084] It is understandable that |ΔE| can be any one of 5, 5.2, 5.5, 5.8, 6, or 6.5, or any other value greater than 5.

[0085] Understandably, |ΔE| can also be selected as any value from 1.8 to 2.8, such as 1.8, 1.9, 2.0, 2.3, 2.5, etc. In this case, the difference between the two printed colors is small and not easily noticed, but there is still a certain difference after printing, thus providing a richer printing color effect.

[0086] CIELAB is a color system developed by the CIE (Civil Engineering Institute). Being based on CIELAB means it's built upon this color system and is primarily used to determine the numerical information of a particular color.

[0087] A color space, also known as a color model or color coordinate system, is a method of representing colors using acceptable mathematical methods under certain standards.

[0088] In color theory, the distinction between light, dark, deep, and pale colors is primarily based on brightness (or value), supplemented by saturation. Brightness refers to the lightness or darkness of a color. Saturation refers to the vividness or intensity of a color.

[0089] Bright colors: Colors with high brightness and a visually luminous appearance, usually with varying saturation. Examples include lemon yellow, glitter, and sky blue, which give a light and lively feeling and have a visually expansive effect.

[0090] Dark colors: Colors with low brightness and a visually somber appearance, often low in saturation or high in purity but low in brightness. Examples include dark green, navy blue, and dark gray. They give a calm and subdued visual effect and are often used as backgrounds or to highlight bright colors.

[0091] Dark colors: Essentially belonging to the category of dark colors, they emphasize colors with extremely low brightness and strong covering power, such as pure black, dark brown, and dark purple. They are visually heavy and have a noticeable shrinking effect, making them suitable as a base color layer to enhance the contrast of patterns.

[0092] Light colors: Colors with high brightness but usually low saturation are softer than bright colors, such as off-white, light gray, and light pink. They are visually light and transparent, and are suitable as a base layer 23 or an intermediate layer to avoid strong conflict with the pattern layer 21.

[0093] Bright colors are brighter, meaning they have high brightness and are vibrant; light colors are lighter, meaning they have high brightness and are soft; dark colors are darker, meaning they have low brightness and contain low saturation; and deep colors are very dark, meaning they have extremely low brightness and strong covering power. The core difference between the four lies in the brightness level and the visual weight.

[0094] The target color is the desired final color effect, the endpoint color to be achieved during the design or production process. For example, in the pattern layer 21 of UV transfer printing, the target color may be the exclusive color of the logo, which needs to be achieved by superimposing and coordinating the intermediate color layer 22 and the base color layer 23. It serves as a guiding standard for color mixing.

[0095] A base color is a fundamental color used as a reference or starting point, often employed for color matching or interlayer coordination. For example, the base color layer 23 is often considered the base color, and the color selection for the intermediate color layer 22 and pattern layer 21 should use it as a reference to ensure overall color harmony or create the desired contrast, avoiding color clashes. Optionally, the intermediate color layer 22 and the base color layer 23 can achieve overall color harmony by layering colors from the same color family. Optionally, the intermediate color layer 22 and the base color layer 23 can achieve the desired contrast by using complementary colors.

[0096] In other words, the target color is the final result color, and the reference color is the reference standard in the process. The two are linked by the color logic between layers to jointly achieve the visual effect of the design.

[0097] Please see Figure 5 In an optional embodiment, when the configuration of the medical device housing includes the substrate, the pattern layer 21, the intermediate color layer 22, and the base color layer 23, the steps of providing the substrate and fabricating a surface treatment structure on the substrate to obtain the medical device housing include: S11: Provide the first substrate 1; S211: The pattern layer 21, the intermediate color layer 22, and the base color layer 23 are sequentially fabricated on the first surface of the first substrate 1 to obtain the medical device housing. The first substrate 1 is made of a transparent material. Because the first substrate is transparent, and the pattern layer 21, intermediate color layer 22, and base color layer 23 are sequentially fabricated on the first surface of the first substrate 1, light can penetrate the substrate and reach each layer. Through multiple reflections and superpositions, the pattern layer 21 becomes more visually clear, enhancing the color expression and sense of layering of the surface treatment structure.

[0098] Please see Figure 6 In an optional embodiment, when the configuration of the medical device housing includes the substrate, the base color layer 23, the intermediate color layer 22, and the pattern layer 21, the steps of providing the substrate and fabricating a surface treatment structure on the substrate to obtain the medical device housing further include: S12: Provide a second substrate 3; S221: A second substrate 3 is provided, and the base color layer 23, the intermediate color layer 22, and the pattern layer 21 are sequentially formed on the first surface of the second substrate 3 to obtain the medical device housing. The base color layer 23, intermediate color layer 22, and pattern layer 21 are sequentially formed on the first surface of the second substrate 3. The pattern layer 21 is located on the outermost layer and is directly presented on the outer surface, reducing light propagation loss and making the pattern more visually prominent. Simultaneously, the substrate provides support for the inner layers, improving structural stability.

[0099] Please see Figure 7 In an optional embodiment, when the configuration of the medical device housing includes the surface treatment structure disposed between the two substrates, the steps of providing the substrates and fabricating the surface treatment structure on the substrates to obtain the medical device housing further include: S13: Provide the first substrate 1 and the second substrate 3; S231: The pattern layer 21, the intermediate color layer 22 and the base color layer 23 are sequentially formed on the first surface of the first substrate 1, wherein the first substrate 1 is made of a transparent material; S232: The second substrate 3 is disposed on the side of the base color layer 23 away from the first substrate 1 to obtain the medical device housing. When the sequence of "from pattern layer 21, intermediate color layer 22 to base color layer 23" is adopted, the pattern layer 21 directly contacts the transparent substrate, which can ensure the texture and color accuracy of the pattern layer 21 and avoid damage or contamination to it by subsequent processes such as printing of intermediate color layer 22 and base color layer 23. The first substrate 1 and the second substrate 3 sandwich the surface treatment structure. The transparent substrate ensures that light can enter, and the other substrate enhances the overall strength. The double substrate protects each layer of the surface treatment structure from damage, extends the service life, and the superposition of multiple reflections enhances the visual depth.

[0100] Please see Figure 8 In an optional embodiment, when the medical device housing is configured to include the surface treatment structure disposed between the two substrates, the steps of providing the substrates and fabricating the surface treatment structure on the substrates to obtain the medical device housing further include: S13: Provide the first substrate 1 and the second substrate 3; S241: The base color layer 23, the intermediate color layer 22 and the pattern layer 21 are sequentially formed on the first surface of the second substrate 3; S242: The first substrate 1 is disposed on the side of the pattern layer 21 away from the second substrate 3 to obtain the medical device housing, wherein the first substrate 1 is made of a transparent material. When the sequence of "from base color layer 23, intermediate color layer 22 to pattern layer 21" is adopted, the base color layer 23 is directly attached to the surface of the second substrate, which can make full use of the material properties of the substrate, such as the heat dissipation or rigidity of the metal substrate, and enhance the stability and durability of the base color layer 23. In addition, as the final reflective layer after light penetrates multiple layers, the base color layer 23 is made first to avoid color shift or wear caused by subsequent processes, ensuring the color purity and uniformity of the base color layer 23. The first substrate 1 and the second substrate 3 sandwich the surface treatment structure. The transparent substrate ensures that light can enter, and the other substrate enhances the overall strength. The double substrate protects each layer of the surface treatment structure from damage, extends the service life, and the superposition of multiple reflections enhances the visual depth.

[0101] In an optional embodiment, the steps for fabricating the pattern layer 21 include: A first carrier is provided, and a dark sub-layer 212 of the pattern layer 21 and a light sub-layer 211 of the pattern layer 21 are sequentially fabricated on the first carrier to obtain a transferable pattern decoration. A second carrier is provided, on which a dark texture sublayer 214 and a light texture sublayer 213 of the pattern layer 21 are made to obtain a transferable texture decoration. Based on the UV transfer printing process, the transferable pattern decoration is transferred to the first surface of the first substrate 1; Based on the UV transfer printing process, the transferable texture decoration is transferred to the surface of the transferable pattern decoration on the side away from the substrate. By using the UV transfer printing process to produce the sub-layers of the pattern layer 21 in steps, the edge contours and overlay accuracy of each sub-layer can be precisely controlled, printing deviations can be reduced, the pattern and texture details can be made clear, the sense of layering can be enhanced, and the visual expression and consistency of the pattern layer 21 can be improved.

[0102] The first and second carriers must be compatible with the characteristics of the UV transfer printing process and the precision requirements of the transfer layer, focusing on load-bearing stability, peel performance, light transmittance, and surface compatibility. Materials with good UV transmittance, such as PET or PC films, are preferred for both the first and second carriers to ensure UV light can penetrate and cure the transfer layer. The surfaces require release treatment, such as coating with a silicone oil release layer, to ensure smooth peeling from the pattern / texture sublayer during transfer, leaving no carrier residue. Simultaneously, both carriers need sufficient mechanical strength and flatness. The thickness of the first and second carriers is typically 50-150 μm, a range that prevents carrier deformation from affecting the precision of pattern lines and texture details. They must also withstand temperature changes during UV curing to prevent carrier shrinkage or damage, ultimately ensuring the integrity of the transferable pattern / texture decoration and the precision of the substrate surface after transfer.

[0103] UV transfer printing is a surface treatment technology that uses ultraviolet light to cure and transfer precise patterns / textures.

[0104] Optionally, the thickness of the transferable pattern decoration is 20μm to 40μm.

[0105] In an optional embodiment, the intermediate color layer 22 is printed using a screen printing process, and / or the base color layer 23 is printed using ink printing. Screen printing of the intermediate color layer 22 ensures uniform color over a large area, while ink printing of the base color layer 23 facilitates precise color matching. The combination of these two processes can stably present the color characteristics of each layer, ensure the optical superposition effect of multiple layers, and improve the stability of the appearance.

[0106] In an optional embodiment, the step of fabricating a surface-treated structure on the substrate to obtain a medical device housing further includes: Perform a pretreatment to increase adhesion in the target area of ​​the substrate; The surface treatment structure is fabricated in the pretreated target area to obtain the medical device housing. Pretreatment of the target area of ​​the substrate increases adhesion, making the surface treatment structure bond more firmly to the substrate, reducing pattern peeling and color distortion caused by interlayer delamination during use, extending the service life of the medical device housing, and maintaining the appearance integrity of the medical device housing.

[0107] Pretreatment to increase adhesion in the target area of ​​the substrate involves altering the surface state of the target area through physical, chemical, or combined physical-chemical methods. This alteration may include changes in surface roughness, chemical activity, or contaminant removal, thereby enhancing the bonding strength between the surface-treated structure and the substrate.

[0108] Pretreatments to increase adhesion include physical pretreatment and chemical pretreatment. Physical pretreatment is suitable for most substrates and focuses on improving surface roughness, such as mechanical grinding / sandblasting, plasma bombardment, and laser etching to create regular or irregular micro-textures on the surface. Chemical pretreatment is suitable for metals, glass, etc., and focuses on improving chemical activity, such as acid and alkali cleaning / etching and surface coating with modifiers.

[0109] In an optional embodiment, prior to the step of providing the substrate, the method further includes: A substrate with at least one groove or at least one protrusion is fabricated, wherein the groove is fabricated using a groove-making process suitable for the material of the substrate, and the protrusion is fabricated using a protrusion-making process suitable for the material of the substrate. Fabricating the substrate with grooves or protrusions using a material-matching process ensures that the substrate structure meets design requirements, enhances its compatibility with other components, increases strength with protrusions, provides functional space with grooves, enriches the aesthetic appeal, and improves practicality and recognizability.

[0110] In an optional embodiment, the method further includes: producing a protective film on the medical device housing by immersion, spraying, or inkjet printing processes; The protective film is disposed in at least one of the following locations: The first position is the surface of the substrate that is away from the surface-treated structure; The second position is the first exposed area, wherein the surface treatment structure is disposed on the first surface of the substrate, and the first exposed area is the area on the first surface of the substrate that is not covered by the surface treatment structure; The third location is the exposed area of ​​the surface-treated structure. Protective films, created using processes such as immersion, spraying, and inkjet printing, and arranged as needed, can effectively block external erosion and physical damage. They are also easy to clean, reduce aging and appearance contamination of the surface-treated structure, and extend the aesthetic lifespan and durability of the medical device housing.

[0111] Immersion process: The medical device housing is immersed in a liquid coating, and a film is formed by the surface tension of the housing. The surface of the housing must be cleaned and activated beforehand, and the coating viscosity, immersion time, and lifting speed must be controlled before curing. Suitable for batch production of regularly shaped housings, this method is low-cost but has limited film thickness accuracy. Spray coating process: Atomized coating is applied to the medical device housing using a spray gun. After pretreatment, the spray gun distance, speed, and number of passes are adjusted, and the coating is cured in a clean environment. Suitable for large areas and complex curved surfaces, the film thickness is controllable, environmental control is required to avoid defects, and it offers high flexibility. Inkjet printing process: The printhead precisely jets protective ink onto the medical device housing. After pre-treating the housing, it is positioned and calibrated to control droplet size and the number of printing layers, which are then UV cured to form a film. Suitable for high-precision and personalized needs, it can achieve integrated pattern and protection. While costing more, it offers high precision.

[0112] In an optional embodiment, the method further includes: fabricating an adhesive backing layer 4 for the medical device housing, wherein the adhesive backing layer 4 is located on the surface of the base color layer 23 away from the intermediate color layer 22, and the adhesive backing layer 4 is in direct contact with the base color layer 23. Providing the adhesive backing layer 4 on the base color layer 23 enhances the ease and stability of connection between the medical device housing and other components. The direct contact of the adhesive backing layer 4 with the base color layer 23 avoids affecting the optical effects of the intermediate color layer 22 and the pattern layer 21, balancing structural connection and aesthetic appearance.

[0113] The adhesive backing layer 4 of the medical device housing can be fabricated by the following steps: pre-treating the adhesive backing area of ​​the medical device housing, i.e., the surface where the adhesive backing layer 4 needs to be fabricated, cleaning the oil and dust from the adhesive backing area, and, if necessary, improving the roughness of the adhesive backing area through grinding or plasma treatment; selecting a suitable adhesive backing material, such as double-sided tape or pressure-sensitive adhesive; if it is tape, cutting it directly into a shape that matches the housing; if it is liquid adhesive, applying it evenly using a coating or dispensing process; ensuring accurate positioning during bonding, applying uniform pressure to remove air bubbles, and some adhesive materials need to be cured to enhance adhesion, such as through UV curing or heat curing to enhance adhesion, and finally completing the fabrication of the adhesive backing layer 4.

[0114] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0115] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for manufacturing a medical device housing, characterized in that, The method includes: Provide base materials; A surface-treated structure is fabricated on the substrate to obtain a medical device housing, wherein the surface-treated structure includes a pattern layer, an intermediate color layer and a base color layer stacked sequentially, and the pattern layer is visible on the outer surface of the medical device housing; When creating the pattern layer: When the pattern layer visible on the outer surface of the medical device housing needs to present a light-colored dominant pattern, the light-colored ink layer is printed first, followed by the dark-colored ink layer. When the pattern layer visible on the outer surface of the medical device housing needs to present a dark dominant pattern, the dark ink layer is printed first and then the light ink layer is printed. When the pattern layer visible on the outer surface of the medical device housing needs to present a neutral color pattern, the printing order of the target color and the reference color is determined based on the contrast difference between the target color and the reference color of the pattern layer.

2. The method for manufacturing a medical device housing according to claim 1, characterized in that, When the pattern layer visible on the outer surface of the medical device housing needs to present a neutral color pattern, the contrast difference ΔE between the target color and the reference color of the pattern layer is calculated using the CIELAB color space; when |ΔE|≥5, the color with the highest contrast between the target color and the reference color is used as the first printed color, and the color with the lowest contrast between the target color and the reference color is used as the second printed color.

3. The method for manufacturing a medical device housing according to claim 1, characterized in that, The steps for creating the pattern layer include: A first carrier is provided, and a dark sub-layer of the pattern layer and a light sub-layer of the pattern layer are sequentially fabricated on the first carrier to obtain a transferable pattern decoration. A second carrier is provided, on which a dark texture sublayer and a light texture sublayer of the pattern layer are fabricated to obtain a transferable texture decoration; Based on the UV transfer printing process, the transferable pattern decoration is transferred onto the first surface of the first substrate; Based on the UV transfer printing process, the transferable texture decoration is transferred to the surface of the transferable pattern decoration on the side away from the substrate.

4. The method for manufacturing a medical device housing according to claim 1, characterized in that, The intermediate color layer is printed using a screen printing process, and / or the base color layer is printed using an ink printing process; The step of fabricating a surface-treated structure on the substrate to obtain a medical device housing further includes: Perform a pretreatment to increase adhesion in the target area of ​​the substrate; The surface treatment structure is fabricated in the pretreated target area to obtain the medical device housing.

5. The method for manufacturing a medical device housing according to claim 1, characterized in that, The method further includes: producing a protective film for the medical device housing by means of immersion, spraying or inkjet printing processes; The protective film is disposed in at least one of the following locations: The surface of the substrate that is away from the surface-treated structure; The first exposed area is the area on the first surface of the substrate that is not covered by the surface treatment structure. The exposed area of ​​the surface-treated structure.

6. The method for manufacturing a medical device housing according to claim 1, characterized in that, The method further includes: fabricating an adhesive backing layer for the medical device housing, wherein the adhesive backing layer is located on the side of the base color layer away from the intermediate color layer, and the adhesive backing layer is in direct contact with the base color layer.

7. A medical device housing, characterized in that, The medical device housing is manufactured using the medical device housing manufacturing method according to any one of claims 1 to 6, and the medical device housing includes: a substrate and a surface treatment structure disposed on the substrate; The surface treatment structure includes a pattern layer, an intermediate color layer, and a base color layer stacked sequentially, and the pattern layer is visible on the outer surface of the medical device housing.

8. The medical device housing according to claim 7, characterized in that, The pattern layer includes a pattern light-colored sub-layer, a pattern dark-colored sub-layer, a texture light-colored sub-layer, and a texture dark-colored sub-layer stacked sequentially, with the texture dark-colored sub-layer located between the texture light-colored sub-layer and the intermediate color layer; The edge contour of the dark sub-layer of the pattern extends circumferentially beyond the corresponding light sub-layer of the pattern; The edge contour of the dark texture sublayer extends circumferentially beyond the corresponding light texture sublayer.

9. The medical device housing according to claim 7, characterized in that, The medical device housing has any of the following configurations: A first configuration, comprising sequentially the substrate, the pattern layer, the intermediate color layer, and the base color layer; The second configuration includes, in sequence, the substrate, the base color layer, the intermediate color layer, and the pattern layer; A third configuration, wherein the surface treatment structure is disposed between the two substrates.

10. The medical device housing according to claim 7, characterized in that, The medical device housing also includes: a protective membrane; The protective film is disposed in at least one of the following locations: The first position is the surface of the substrate that is away from the surface-treated structure; The second position is the first exposed area, wherein the surface treatment structure is disposed on the first surface of the substrate, and the first exposed area is the area on the first surface of the substrate that is not covered by the surface treatment structure; The third position is the exposed area of ​​the surface-treated structure.

Images