A color-changeable cap and a manufacturing method thereof

Abstract

The present application relates to the technical field of color-changing cover, and discloses a color-changing cover and a manufacturing method thereof, which comprises a cover body with a plurality of mounting grooves distributed on the outer side, a first color-changing sheet arranged in a part of the mounting grooves, and a second color-changing sheet arranged in another part of the mounting grooves; the first color-changing sheet is an ultraviolet ray response color-changing sheet or a temperature response color-changing sheet, and the second color-changing sheet is an ultraviolet ray response color-changing sheet or a temperature response color-changing sheet. The temperature response color-changing sheet or the ultraviolet ray response color-changing sheet can be selected according to the storage environment and the use environment of different articles, and people can be intuitively prompted about the color change by sensing the change of ultraviolet rays or temperature. When the color-changing cover is applied to articles carried by people, people can be effectively prompted to pay attention to sun protection outdoors. When the color-changing cover is applied to the field of food and medicine, people can be prompted to place food or medicine in a suitable storage environment to prevent deterioration.

Description

Technical Field

[0001] This invention relates to the field of color-changing cap technology, and more specifically, to a color-changing cap and its manufacturing method. Background Technology

[0002] Lids are used in everyday life for cosmetic containers, medicine containers, and containers for food or drinks. For example, containers for food, drinks, or medicine usually have storage instructions on their surfaces to remind people to store the food in a suitable environment. However, this method of instruction is not intuitive enough, and people still forget or ignore storing items in a suitable environment, which can lead to spoilage.

[0003] Therefore, it is necessary to propose a color-changing lid and its manufacturing method to at least partially solve the problems existing in the prior art. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a color-changing cover, comprising: a cover body having a plurality of mounting grooves distributed on its outer side, wherein a first color-changing sheet is provided in a portion of the mounting grooves and a second color-changing sheet is provided in another portion of the mounting grooves; the first color-changing sheet is an ultraviolet-responsive color-changing sheet or a temperature-responsive color-changing sheet, and the second color-changing sheet is an ultraviolet-responsive color-changing sheet or a temperature-responsive color-changing sheet.

[0006] Preferably, the top surface of the cover is provided with a groove, and a third color-changing sheet is provided in the groove, at least a portion of which changes color under a set environment;

[0007] The set environment includes one or more of ultraviolet light of a set wavelength and a set temperature.

[0008] Preferably, the mounting groove is L-shaped and extends from the side of the cover to the outer side of the top surface of the cover.

[0009] Preferably, the third color-changing sheet has a color-changing pattern area, which changes color under a set environment.

[0010] Preferably, the third color-changing sheet includes a bottom sheet and a top sheet, wherein the top sheet changes from its original color to a first color under ultraviolet light of a set wavelength, and the bottom sheet changes from its original color to a second color when it reaches a set temperature;

[0011] The original color of the surface layer is colorless. The first color of the surface layer after color change is the same as the original color of the bottom layer. The second color of the bottom layer after color change can penetrate the surface layer.

[0012] Preferably, the third color-changing sheet includes a bottom sheet and a top sheet. The top sheet is semi-transparent. The bottom sheet has a color-changing pattern area. When the color-changing pattern area reaches a set temperature, it changes from its original color to a third color. The top sheet changes from its original color to a fourth color under ultraviolet light.

[0013] Preferably, it also includes a sealing protective layer disposed on the outside of the cover, covering the first color-changing sheet, the second color-changing sheet, and the third color-changing sheet.

[0014] The present invention also provides a method for manufacturing a color-changing lid, comprising:

[0015] S1. A cover with multiple mounting slots on the outside is made by injection molding, and grooves are engraved on the surface of the cover.

[0016] S2. Make UV-responsive color-changing sheets and temperature-responsive color-changing sheets corresponding to the mounting slots, and embed the UV-responsive color-changing sheets and temperature-responsive color-changing sheets into the corresponding mounting slots respectively.

[0017] S3. Fill the groove with a third color-changing sheet; or, make the third color-changing sheet separately and then embed it into the groove, at least a portion of the third color-changing sheet can change color under a set environment.

[0018] Preferably, the fabrication of the UV-responsive color-changing film includes: fabricating a first substrate corresponding to the mounting groove, and forming a photochromic ink layer on the surface of the first substrate to obtain the UV-responsive color-changing film;

[0019] The fabrication of temperature-responsive color-changing sheets includes: hot pressing thermochromic composite materials to obtain temperature-responsive color-changing sheets.

[0020] Preferably, it also includes: covering the surface of the cover after the ultraviolet-responsive color-changing sheet, the temperature-responsive color-changing sheet and the third color-changing sheet are installed with transparent resin to form a sealed protective layer.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] The color-changing cap and its manufacturing method described in this invention can select between temperature-responsive color-changing film or ultraviolet-responsive color-changing film according to the storage and usage environment of different items. By sensing changes in ultraviolet light or temperature, it provides people with intuitive prompts on color changes. When applied to personal items, it can effectively remind people to pay attention to sun protection outdoors. When applied to food and medicine, it can remind people to place food or medicine in a suitable storage environment to prevent spoilage.

[0023] The color-changing lid and its manufacturing method described in this invention, along with other advantages, objectives, and features of the invention, will be partly apparent from the following description and partly understood by those skilled in the art through study and practice of the invention. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is an exploded structural diagram of the color-changing lid described in this invention;

[0026] Figure 2 This is a schematic diagram of the structure of the color-changing lid described in this invention;

[0027] Figure 3 This is a schematic diagram of the top surface structure of the color-changing lid described in this invention;

[0028] Figure 4 This is a schematic diagram of the first structure of the third color-changing sheet in the color-changing lid of the present invention;

[0029] Figure 5 This is a schematic diagram of a second structure of the third color-changing sheet in the color-changing lid described in this invention;

[0030] Figure 6 This is a schematic diagram of the third structure of the third color-changing sheet in the color-changing lid described in this invention;

[0031] Figure 7 This is a schematic diagram of the structure of the color-changing lid of the present invention, in which color-changing pattern areas are respectively set on the bottom sheet and the top sheet;

[0032] Figure 8 This is a flowchart of the method for manufacturing the color-changing lid according to the present invention. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0034] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0035] like Figure 1 and Figure 2 As shown, the present invention provides a color-changing cover, comprising: a cover body 1, with a plurality of mounting grooves 2 distributed on its outer side, a portion of the mounting grooves 2 having a first color-changing sheet 3, and another portion of the mounting grooves 2 having a second color-changing sheet 4; the first color-changing sheet 3 is an ultraviolet-responsive color-changing sheet or a temperature-responsive color-changing sheet, and the second color-changing sheet 4 is an ultraviolet-responsive color-changing sheet or a temperature-responsive color-changing sheet.

[0036] Multiple mounting slots 2 are distributed circumferentially along the cover 1. The first color-changing sheet 3 and the second color-changing sheet 4 are connected to the mounting slots 2 by means of adhesive, snap-fit ​​or interference fit, so as to fit into the mounting slots 2. A first magnetic piece can also be set on the back of the first color-changing sheet 3 and the second color-changing sheet 4, and a second magnetic piece corresponding to the first magnetic piece can be set in the mounting slot 2, so that the two can be detached and connected. Thus, according to the usage requirements, the ultraviolet-responsive color-changing sheet or the temperature-responsive color-changing sheet can be installed in the mounting slot 2, which improves the convenience of use. The size of the cover 1 is adapted to the corresponding container.

[0037] Both the first color-changing film 3 and the second color-changing film 4 can be temperature-responsive color-changing films, which can be applied to the lid 1 of containers for holding food and medicine. For example, for food that needs to be stored in an environment with a temperature below zero degrees Celsius and does not require ultraviolet light, both the first color-changing film 3 and the second color-changing film 4 used in the container for holding this food can be temperature-responsive color-changing films. When the food is placed in an environment above zero degrees Celsius, the temperature-responsive color-changing film will change color to indicate that people need to store the food in a refrigerator or a cool place.

[0038] Both the first color-changing film 3 and the second color-changing film 4 can be UV-responsive color-changing films, which can be applied to the cap 1 of cosmetics. For example, when the cap 1 is applied to cosmetics, such as lipsticks, which are usually carried around, the cap 1 of the lipstick will be exposed to ultraviolet rays when used outdoors. When the outdoor UV index is greater than 5, the first color-changing film 3 and the second color-changing film 4 on the cap 1 will change color when exposed to ultraviolet rays to remind people to pay attention to sun protection. It should be noted that the UV index is represented by numbers from 0 to 15. The higher the UV index, the greater the damage to human skin. When the UV index is 5 and 6, it means that the amount of ultraviolet rays is of moderate intensity and has a moderate degree of harmful effect on human skin.

[0039] One of the first color-changing film 3 and the second color-changing film 4 is a temperature-responsive color-changing film, and the other is an ultraviolet-responsive color-changing film. The first color-changing film 3 and the second color-changing film 4 are arranged alternately and can be applied to the lid 1 of containers for holding medicines and food. For example, some medicines need to be stored away from light and refrigerated. The temperature-responsive color-changing film and the ultraviolet-responsive color-changing film on the lid 1 can sense changes in ultraviolet light and temperature, and indicate to people that the medicines should be stored in a suitable environment by changing color.

[0040] Through the above design, temperature-responsive color-changing film or ultraviolet-responsive color-changing film can be selected according to the storage and usage environment of different items. By sensing changes in ultraviolet light or temperature, it can provide people with intuitive prompts on color changes. When applied to personal items, it can effectively remind people to pay attention to sun protection outdoors. When applied to food and medicine, it can remind people to place food or medicine in a suitable storage environment to prevent spoilage.

[0041] like Figure 1 As shown, the mounting groove 2 is L-shaped and extends from the side of the cover 1 to the outer side of the top surface of the cover 1.

[0042] The first color-changing film 3 and the second color-changing film 4 are also L-shaped, corresponding to the mounting groove 2, which enables the first color-changing film 3 and the second color-changing film 4 to sense changes in ultraviolet light or temperature from multiple angles.

[0043] like Figure 1 As shown, in one embodiment, the top surface of the cover 1 is provided with a groove 5, and a third color-changing sheet 6 is provided in the groove 5. At least a portion of the third color-changing sheet 6 changes color under a set environment.

[0044] The set environment includes one or more of ultraviolet light of a set wavelength and a set temperature.

[0045] The wavelength of ultraviolet light can be selected from 315 nanometers to 400 nanometers, for example, 365 nanometers.

[0046] Based on the first color-changing film 3 and the second color-changing film 4, this embodiment has been improved by adding a third color-changing film 6 to the top surface of the cover 1. At least a portion of the third color-changing film 6 can change color under a set environment, for example, the set wavelength of ultraviolet light is 365 nanometers and the set temperature is 35 degrees Celsius. When making the third color-changing film 6, it can be made to change color under the set environment to play an anti-counterfeiting role.

[0047] like Figure 3 As shown, in one embodiment, the third color-changing sheet 6 is provided with a color-changing pattern area 7, which changes color under a set environment.

[0048] The third color-changing film 6 only changes color in the color-changing pattern area 7 under the set environment, while the remaining areas may not change color or may be made of the same material as the UV-responsive or temperature-responsive color-changing film on the cover 1 (i.e., the color-changing pattern is consistent); for example, Figure 3 In the letters “R” and “E” shown, the vertical bar to the left of “R” and “E” is set as the color-changing pattern area 7, while the rest of the parts are the same as the ultraviolet-responsive color-changing film or temperature-responsive color-changing film on the cover 1, so that the vertical bar to the left of “R” and “E” is an anti-counterfeiting mark.

[0049] like Figure 4 As shown, this is the first structure of the third color-changing sheet 6. In one embodiment, the third color-changing sheet 6 includes: a bottom sheet 61 and a top sheet 62. The top sheet 62 changes from its original color to a first color under ultraviolet light of a set wavelength, and the bottom sheet 61 changes from its original color to a second color when it reaches a set temperature.

[0050] The original color of the surface layer 62 is colorless. The first color of the surface layer 62 after color change is the same as the original color of the bottom layer 61. The second color of the bottom layer 61 after color change can penetrate the surface layer 62.

[0051] For example, in an environment without ultraviolet light of a set wavelength (by an ultraviolet lamp) and without reaching the set temperature, the bottom layer 61 is blue, and the top layer 62 is colorless, i.e., transparent or translucent. Then, the third color-changing sheet 6 can be observed to be blue from the top of the cover 1. In an environment with ultraviolet light of a set wavelength and without reaching the set temperature, the bottom layer 61 is blue, and the top layer 62 changes from colorless to blue. Then, the third color-changing sheet 6 can be observed to be blue from the top of the cover 1. In an environment without ultraviolet light of a set wavelength and with reaching the set temperature, the bottom layer 61 changes from blue to red, while the top layer 62 remains transparent or translucent. Then, the third color-changing sheet 6 can be observed to be red from the top of the cover 1.

[0052] Through the above design, by setting two layers of color-changing sheets with different environmental responses on the third color-changing sheet 6, the anti-counterfeiting identification effect can be increased.

[0053] like Figure 4 As shown, the bottom layer 61 is formed by hot pressing a thermochromic material, and the top layer 62 is formed by spraying photochromic ink; wherein, the thermochromic material can be any one of the existing technologies; the photochromic ink can be any one of the existing technologies.

[0054] like Figure 5As shown, the third color-changing sheet 6 has a second structure. The third color-changing sheet 6 also includes a substrate layer 63. The substrate layer 63 is injection molded, and then a thermochromic material (any of the existing technologies, such as thermochromic microcapsules) is screen-printed on the surface of the substrate layer 63 to form a bottom sheet 61. Then, photochromic ink is sprayed on the surface of the bottom sheet 61 and cured to form a surface sheet 62.

[0055] like Figure 6 As shown, this is the third structure of the third color-changing sheet 6. In one embodiment, the third color-changing sheet 6 includes: a bottom sheet 61 and a top sheet 62. The top sheet 62 is semi-transparent. The bottom sheet 61 has a color-changing pattern area 7. When the color-changing pattern area 7 reaches a set temperature, it changes from the original color to a third color. The top sheet 62 changes from the original color to a fourth color under ultraviolet light.

[0056] The surface sheet 62 changes color under ultraviolet radiation. Under ultraviolet radiation, that is, when the outdoor ultraviolet index is greater than or equal to 5, the surface sheet 62 changes color. There is no need to set the wavelength of the ultraviolet radiation.

[0057] The shape of the third color-changing sheet 6 and the shape of the color-changing pattern area 7 can be set arbitrarily.

[0058] For example, in an environment without ultraviolet radiation and where the set temperature has not been reached, the surface sheet 62 is light yellow, and the bottom sheet 61 and the color-changing pattern area 7 are both blue. Therefore, when viewed from the top surface of the cover 1, the color of the third color-changing sheet 6 is the superposition of light yellow and blue, i.e., green. In an environment without ultraviolet radiation and where the set temperature has been reached, the surface sheet 62 is light yellow, and the color-changing pattern area 7 turns white. Therefore, when viewed from the top surface of the cover 1, the shape of the color-changing pattern area 7 is displayed on the third color-changing sheet 6, and its color is light yellow. In an environment with ultraviolet radiation and where the set temperature has not been reached, the surface sheet 62 turns blue, and the bottom sheet 61 and the color-changing pattern area 7 are also blue. Therefore, when viewed from the top surface of the cover 1, the third color-changing sheet 6 is blue. In an environment with ultraviolet radiation and where the set temperature has been reached, the surface sheet 62 turns blue, and the color-changing pattern area 7 turns white. Therefore, when viewed from the top surface of the cover 1, the shape of the color-changing pattern area 7 is displayed on the third color-changing sheet 6, and its color is blue.

[0059] By using ultraviolet light irradiation and a set temperature, the color-changing pattern area 7 can be observed on the top surface of the cover 1, and different colors can be displayed under different environments to enhance anti-counterfeiting identification. At the same time, the color change of the surface sheet 62 can also respond to ultraviolet light irradiation. Thus, by simply installing a temperature-responsive color-changing sheet in the mounting slot 2, the cover 1 can have both temperature and ultraviolet light response indicators, as well as anti-counterfeiting functions.

[0060] like Figure 6As shown, the bottom sheet 61 is injection molded, and its surface is screen-printed with a thermochromic material to form a color-changing pattern area 7. Then, a semi-transparent photochromic ink is sprayed on it, and after curing, a surface sheet 62 is formed.

[0061] like Figure 7 As shown, a combination of color-changing patterns is also provided on the bottom layer 61 and the top layer 62 respectively. Specifically, both the bottom layer 61 and the top layer 62 have color-changing pattern areas 7. The original color of the bottom layer 61 is white, and the original color of the top layer 62 is semi-transparent. After the two color-changing pattern areas 7 change color, the overlapping patterns form an anti-counterfeiting QR code. For example, under ultraviolet light and without reaching the set temperature, after the color-changing pattern area 7 of the top layer 62 changes color (e.g., turns black), most of the area forming the QR code (e.g., only missing one or two pixels of the QR code) remains unchanged, while the color-changing pattern area 7 of the bottom layer 61 does not change color. In this case, a fake QR code is displayed on the third color-changing sheet 6 on the top surface of the cover 1, and the displayed fake QR code cannot be verified for authenticity. Under ultraviolet light and with reaching the set temperature, both the top layer 62 and the bottom layer 61 change color simultaneously (e.g., both turn black). In this case, a genuine QR code is displayed on the third color-changing sheet 6 on the top surface of the cover 1, and scanning the genuine QR code can verify authenticity.

[0062] The design of the above-mentioned combination of color-changing patterns further enhances the anti-counterfeiting identification of the third color-changing film 6.

[0063] In one embodiment, it further includes: a sealing protective layer disposed on the outside of the cover 1, covering the first color-changing sheet 3, the second color-changing sheet 4 and the third color-changing sheet 6.

[0064] The sealing and protective layer can be sprayed or coated with a transparent resin material on the surface of the cover 1 after the first color-changing sheet 3, the second color-changing sheet 4 and the third color-changing sheet 6 are installed, so as to protect the first color-changing sheet 3, the second color-changing sheet 4 and the third color-changing sheet 6 as a whole and improve the service life of the color-changing sheets.

[0065] like Figure 8 As shown, the present invention also provides a method for manufacturing a color-changing lid, comprising:

[0066] The cover 1 with multiple mounting grooves 2 on the outside is made by injection molding, and the groove 5 is engraved on the surface of the cover 1.

[0067] Fabricate UV-responsive color-changing sheets and temperature-responsive color-changing sheets corresponding to mounting slot 2, and embed the UV-responsive color-changing sheets and temperature-responsive color-changing sheets into the corresponding mounting slot 2 respectively;

[0068] The groove 5 is filled with a third color-changing sheet 6; or, the third color-changing sheet 6 is made separately and then embedded into the groove 5, at least a portion of the third color-changing sheet 6 can change color under a set environment.

[0069] The ultraviolet-responsive color-changing film and the temperature-responsive color-changing film can be selected and set according to the actual needs of the cover 1;

[0070] The third color-changing film 6 uses, as... Figure 3 The structure shown can be formed by directly filling the groove 5; for example... Figure 3 The grooves corresponding to the vertical bars to the left of "R" and "E" shown are filled with thermochromic or photochromic materials, while the remaining grooves are filled with materials that do not have color-changing properties, forming the third color-changing sheet 6; the third color-changing sheet 6 adopts the following... Figure 4 The first structure shown, such as Figure 5 The second structure shown and as Figure 6 In the third structure shown, the third color-changing sheet 6 can be made separately, and then the made third color-changing sheet 6 can be fitted into the groove 5. Specifically, it can be connected by means of bonding, snap-fitting or interference fit.

[0071] Furthermore, the fabrication of the ultraviolet-responsive color-changing film includes: fabricating a first substrate corresponding to the mounting groove 2, and forming a photochromic ink layer on the surface of the first substrate to obtain the ultraviolet-responsive color-changing film;

[0072] The fabrication of temperature-responsive color-changing sheets includes: hot pressing thermochromic composite materials to obtain temperature-responsive color-changing sheets.

[0073] The first substrate can be made of plastic. Photochromic ink is sprayed or coated on the surface of the first substrate to obtain an ultraviolet-responsive color-changing sheet. The photochromic ink includes spiropyran or spiroxazine compounds. The temperature-responsive color-changing sheet can be formed by hot pressing a thermochromic composite material. The thermochromic composite material includes epoxy resin or polyurethane, crystal violet lactone, color developer, and alcohol solvent.

[0074] Furthermore, it also includes covering the surface of the cover 1, on which the ultraviolet-responsive color-changing sheet, the temperature-responsive color-changing sheet, and the third color-changing sheet 6 are installed, with transparent resin to form a sealed protective layer.

[0075] Transparent epoxy resin can be used as the transparent resin. It is applied to the surface of the cover 1 by spraying or coating to form a sealed protective layer, thereby extending the service life of the UV-responsive photochromic film, the temperature-responsive photochromic film, and the third photochromic film 6.

[0076] Furthermore, the fabrication of the third color-changing sheet 6 includes: hot pressing the thermochromic composite material to form a bottom layer sheet 61; spraying photochromic ink onto the surface of the bottom layer sheet 61 and curing it to form a top layer sheet 62; applicable to the fabrication of the first structure of the third color-changing sheet 6;

[0077] Alternatively, a substrate layer 63 can be formed by injection molding, and a thermochromic material can be screen-printed on the surface of the substrate layer 63 to form a bottom layer 61. Then, a photochromic ink can be sprayed onto the surface of the bottom layer 61 and cured to form a top layer 62. This method is suitable for the production of the second structure of the third color-changing sheet 6.

[0078] Alternatively, a color-changing pattern can be screen-printed on the surface of the injection-molded bottom sheet 61 to form a color-changing pattern area 7. Then, a semi-transparent photochromic ink can be sprayed onto the surface of the bottom sheet 61 and cured to form a surface sheet 62. This is a third structure applicable to the third color-changing sheet 6.

[0079] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A color-changing lid, characterized in that, include: The cover (1) has multiple mounting slots (2) distributed on its outer side. A first color-changing sheet (3) is provided in a part of the mounting slots (2), and a second color-changing sheet (4) is provided in another part of the mounting slots (2). The first color-changing sheet (3) is an ultraviolet-responsive color-changing sheet or a temperature-responsive color-changing sheet, and the second color-changing sheet (4) is an ultraviolet-responsive color-changing sheet or a temperature-responsive color-changing sheet. The top surface of the cover (1) is provided with a groove (5), and a third color-changing sheet (6) is provided in the groove (5). At least a portion of the third color-changing sheet (6) changes color under a set environment. The set environment includes one or more of ultraviolet light of a set wavelength and a set temperature; The third color-changing sheet (6) includes: a bottom sheet (61) and a top sheet (62). The top sheet (62) changes from its original color to a first color under ultraviolet light of a set wavelength. The bottom sheet (61) changes from its original color to a second color when it reaches a set temperature. The original color of the surface layer (62) is colorless. The first color of the surface layer (62) after color change is the same as the original color of the bottom layer (61). The second color of the bottom layer (61) after color change can penetrate the surface layer (62). Alternatively, the third color-changing sheet (6) may include: a bottom sheet (61) and a top sheet (62), wherein the top sheet (62) is semi-transparent, the bottom sheet (61) has a color-changing pattern area (7), the color-changing pattern area (7) changes from the original color to a third color when the set temperature is reached, and the top sheet (62) changes from the original color to a fourth color under ultraviolet light.

2. The color-changing lid according to claim 1, characterized in that, The mounting groove (2) is L-shaped and extends from the side of the cover (1) to the outer side of the top surface of the cover (1).

3. The color-changing lid according to claim 1, characterized in that, Also includes: A sealing protective layer is set on the outside of the cover (1) to cover the first color-changing sheet (3), the second color-changing sheet (4) and the third color-changing sheet (6).

4. A method for manufacturing a color-changing lid, wherein the lid is the color-changing lid according to any one of claims 1-3, characterized in that, include: The cover (1) with multiple mounting grooves (2) on the outside is made by injection molding, and grooves (5) are engraved on the surface of the cover (1). Make UV-responsive color-changing film and temperature-responsive color-changing film corresponding to the mounting slot (2), and embed the UV-responsive color-changing film and temperature-responsive color-changing film into the corresponding mounting slot (2) respectively; A third color-changing sheet (6) is filled into the groove (5); or, a third color-changing sheet (6) is made separately and then embedded into the groove (5), at least a portion of the third color-changing sheet (6) can change color under a set environment.

5. The method for manufacturing a color-changing lid according to claim 4, characterized in that, The fabrication of the ultraviolet-responsive color-changing film includes: fabricating a first substrate corresponding to the mounting groove (2), and forming a photochromic ink layer on the surface of the first substrate to obtain the ultraviolet-responsive color-changing film; The fabrication of temperature-responsive color-changing sheets includes: hot pressing thermochromic composite materials to obtain temperature-responsive color-changing sheets.

6. The method for manufacturing a color-changing lid according to claim 4, characterized in that, Also includes: The surface of the cover (1) after the UV-responsive color-changing sheet, temperature-responsive color-changing sheet and third color-changing sheet (6) are installed is covered with transparent resin to form a sealed protective layer.

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