Anti-scald intelligent cup cover based on thermosensitive color change
By coating the cup lid with reversible thermosensitive inks of different colors, the problem of existing cup lids not being able to intuitively sense water temperature has been solved, achieving non-contact scald warning and improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UNIV OF SHANGHAI FOR SCI & TECH
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-24
AI Technical Summary
The existing cup lid design does not allow for a direct sense of water temperature, which can easily lead to accidental contact with a hot lid or accidental drinking of boiling water, causing burns.
Three different colors of reversible thermosensitive color-changing ink are coated on the stainless steel sheet of the cup lid to form green, orange-yellow and red temperature-changing indicator layers, which correspond to different temperature ranges and indicate the water temperature through color changes.
It allows users to check the water temperature directly without touching the lid, avoiding scalding. The temperature indicator is intuitive, clear, and reversible, making it more convenient to use.
Smart Images

Figure CN224155431U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of daily necessities, specifically to a heat-sensitive color-changing smart cup lid that prevents burns. Background Technology
[0002] People are used to putting the lid on the cup when drinking hot water to keep the water temperature. However, long-term consumption of boiling water can easily lead to esophageal cancer. Moreover, when the water temperature is too high, people cannot directly know the specific water temperature without touching the lid. They are prone to unconsciously touching the hot lid or accidentally drinking hot water, which can cause burns. This causes inconvenience to people's lives to some extent.
[0003] Among existing cup lid technologies, such as the utility model CN202226179U, a scalding-proof cup lid is disclosed. This lid features an integrated structure with a central pressing part and a scalding-proof protrusion between the pressing part and the edge. This design ensures that fingers will not be burned when pressing the lid while drinking tea. However, this scalding-proof design still cannot directly indicate the water temperature; contact with the lid cannot be completely avoided when checking the water temperature. Utility model CN202981349U discloses a fluorescent temperature-measuring cup lid. It features a heat-insulating layer that senses the temperature of the water inside the cup. This layer contains a fluorescent substance that is affected by water temperature. As the water temperature rises, the fluorescence of the fluorescent substance intensifies, and the color changes accordingly, thus providing an indication. While this design avoids direct contact with the lid, its indication effect is not obvious and is easily affected by ambient light, leading to misjudgment by the user. Utility Model Content
[0004] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a heat-sensitive color-changing smart cup lid to prevent burns.
[0005] A heat-sensitive color-changing anti-scalding smart cup lid is characterized by the following features: a cup lid body with a handle at the top; a stainless steel sheet disposed within the cup lid body; wherein the stainless steel sheet has a steel sheet body with a first annular groove, a second annular groove, and a third annular groove formed thereon; the first annular groove is located in the inner circle of the steel sheet body and is coated with a green reversible heat-sensitive color-changing ink with a color-changing temperature of 24-26℃ to form a green temperature-changing indication layer; the second annular groove is located in the middle circle of the steel sheet body and is coated with an orange-yellow reversible heat-sensitive color-changing ink with a color-changing temperature of 34-36℃ to form an orange-yellow temperature-changing indication layer; and the third annular groove is located in the outer circle of the steel sheet body and is coated with a red reversible heat-sensitive color-changing ink with a color-changing temperature of 49-51℃ to form a red temperature-changing indication layer.
[0006] The heat-sensitive color-changing anti-scalding smart cup lid provided by this utility model may also have the following feature: the main body of the cup lid is made of transparent rigid polypropylene (PP).
[0007] The heat-sensitive color-changing anti-scalding smart cup lid provided by this utility model may also have the following features: the lower parts of both sides of the cup lid body are bent inward and cooperate with the upper part of the cup lid body to form a groove, and a stainless steel sheet is embedded in the groove.
[0008] The heat-sensitive color-changing anti-scalding smart cup lid provided by this utility model may also have the following features: the thickness of the steel sheet body is 1mm, and the thickness of the first annular groove, the second annular groove and the third annular groove are all 0.5mm.
[0009] The heat-sensitive color-changing anti-scalding smart cup lid provided by this utility model may also have the following feature: the first annular groove, the second annular groove and the third annular groove are equally spaced, with a spacing of 0.8cm.
[0010] The heat-sensitive color-changing anti-scalding smart cup lid provided by this utility model may also have the following feature: the width of the first annular groove, the second annular groove and the third annular groove is 0.4cm.
[0011] The heat-sensitive color-changing anti-scalding smart cup lid provided by this utility model may also have the following features: the temperature tolerance range of the green reversible heat-sensitive color-developing ink, the orange-yellow reversible heat-sensitive color-developing ink, and the red reversible heat-sensitive color-developing ink is -10 to 120°C.
[0012] Functions and effects of utility models
[0013] According to this utility model, a heat-sensitive color-changing anti-scalding smart cup lid is created by coating three different colors of reversible heat-sensitive inks with different heat-sensitive ranges into the first, second, and third annular grooves, forming three temperature-changing indicator layers: a green temperature-changing indicator layer, an orange-yellow temperature-changing indicator layer, and a red temperature-changing indicator layer. This allows users to directly understand the specific water temperature without touching the lid, avoiding accidental contact with a hot lid or drinking hot water that could cause scalding. Furthermore, the three temperature-changing indicator layers create a pseudo-dynamic change in water temperature, making the indicator effect more intuitive, obvious, and reversible, thus improving user experience. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of the heat-sensitive color-changing anti-scalding smart cup lid in this embodiment of the utility model;
[0015] Figure 2 This is a cross-sectional view of the heat-sensitive color-changing anti-scalding smart cup lid in this embodiment of the utility model;
[0016] Figure 3 This is a top view of the heat-sensitive color-changing anti-scalding smart cup lid in this embodiment of the utility model.
[0017] Explanation of symbols for main components:
[0018] In the image: 100. Heat-sensitive color-changing anti-scalding smart cup lid; 1. Handle; 2. Cup lid body; 3. Stainless steel sheet; 4. Red temperature-changing indicator layer; 5. Orange-yellow temperature-changing indicator layer; 6. Green temperature-changing indicator layer. Detailed Implementation
[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0020] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the heat-sensitive color-changing anti-scalding smart cup lid of this utility model.
[0021] Figure 1 This is a schematic diagram of the structure of the heat-sensitive color-changing anti-scalding smart cup lid 100 in this embodiment of the utility model.
[0022] Figure 2 This is a cross-sectional view of the heat-sensitive color-changing anti-scalding smart cup lid 100 in this embodiment of the present invention.
[0023] Figure 3 This is a top view of the heat-sensitive color-changing anti-scalding smart cup lid 100 in this embodiment of the utility model.
[0024] like Figure 1-3 As shown, the heat-sensitive color-changing anti-scalding smart cup lid (hereinafter referred to as the cup lid) 100 in this embodiment includes a cup lid body 2 and a stainless steel sheet 3.
[0025] The main body of the cup lid 2 is made of transparent rigid polypropylene (PP).
[0026] The top of the cup lid body 2 has a handle 1, and the cup lid body 2 and handle 1 are designed as a single unit.
[0027] Specifically, the overall diameter of the lid body 2 is 10cm, suitable for mugs with a mouth diameter of 6-8cm. The upper surface of the handle 1 is decagonal, and its body is curved from top to bottom, with the upper width being greater than the lower width. The radius of the upper end of the handle 1 is 0.75cm, and the radius of the lower end is 0.5cm.
[0028] The lower sides of the cup lid body 2 are curved inwards to form a groove with the upper part of the cup lid body 2, and the stainless steel sheet 3 is embedded in the groove.
[0029] Specifically, the vertical distance between the stainless steel sheet 3 and the lower end of the handle 1 is 0.5cm. The distance between the outermost edge of the stainless steel sheet 3 and the outermost edge of the adjacent lid body 2 is 0.5cm. The width of the curved portion of the lid body 2 is 0.75cm, and the height is 0.5cm.
[0030] The stainless steel sheet 3 has a main body with a thickness of 1mm. The main body of the steel sheet is milled to form a first annular groove, a second annular groove, and a third annular groove, each with a thickness of 0.5mm.
[0031] The first, second, and third annular grooves are equally spaced, with a spacing of 0.8 cm. The distance from the side of the third annular groove closest to the center point of the steel sheet to the center point of the steel sheet is 0.9 cm.
[0032] The widths of the first, second, and third annular grooves are all 0.4 cm.
[0033] The first annular groove is located on the inner ring of the steel sheet body and is coated with a green reversible thermosensitive color-changing ink with a color-changing temperature of 25°C, forming a green temperature-changing indicator layer 6. When the temperature is 25°C or higher, the color of the green temperature-changing indicator layer 6 changes from colorless to green.
[0034] The second annular groove is located in the middle ring of the steel sheet body and is coated with an orange-yellow reversible thermosensitive color-changing ink with a color-changing temperature of 35°C, forming an orange-yellow temperature-changing indicator layer 5. When the temperature is 35°C or higher, the color of the orange-yellow temperature-changing indicator layer 5 changes from colorless to orange-yellow.
[0035] The third annular groove is located on the outer ring of the steel sheet body and is coated with a red reversible thermosensitive color-changing ink with a color-changing temperature of 50°C, forming a red temperature-changing indicator layer 4. When the temperature is 50°C or higher, the color of the red temperature-changing indicator layer 4 changes from colorless to red.
[0036] Specifically, the reversible thermosensitive color-developing ink uses existing technologies and materials. To facilitate better coating of the reversible thermosensitive color-developing ink on the stainless steel surface, the first, second, and third annular grooves are treated with sandblasting to improve roughness.
[0037] Specifically, when the water temperature in the cup reaches or exceeds 25℃, the green temperature-changing indicator layer 6 will light up, indicating that the water temperature is suitable for drinking. When the water temperature in the cup reaches or exceeds 35℃, both the green temperature-changing indicator layer 6 and the orange-yellow temperature-changing indicator layer 5 will light up, indicating that the water temperature is slightly hot. When the water temperature in the cup reaches or exceeds 50℃, the green temperature-changing indicator layer 6, the orange-yellow temperature-changing indicator layer 5, and the red temperature-changing indicator layer 4 will all light up, indicating that the water temperature is too high and should not be drunk.
[0038] The temperature tolerance range of the green reversible thermosensitive color developing ink, the orange-yellow reversible thermosensitive color developing ink, and the red reversible thermosensitive color developing ink is -10 to 120℃.
[0039] The role and effect of the embodiments
[0040] The heat-sensitive color-changing anti-scalding smart cup lid 100 of this utility model has the following beneficial effects:
[0041] By coating the first, second, and third annular grooves with three different colored reversible thermosensitive inks with varying heat-sensitive ranges, three temperature-changing indicator layers—green (6), orange-yellow (5), and red (4)—are formed. This allows users to directly understand the specific water temperature without touching the lid, preventing accidental burns from touching a hot lid or drinking boiling water. Furthermore, the three temperature-changing indicator layers create a pseudo-dynamic temperature change, making the indicator effect more intuitive, obvious, and reversible, thus enhancing user convenience and overall experience.
[0042] The cup lid body 2 is made of transparent rigid polypropylene PP, which makes it easy to observe the color development of the temperature change indicator layer inside the cup lid body 2. This material is non-toxic, heat-resistant and easy to shape.
[0043] The lower sides of the cup lid body 2 are curved inwards to form grooves with the upper part of the cup lid body 2, and the stainless steel sheet 3 is embedded in the grooves. This design can prevent people from touching the stainless steel sheet 3 when picking up the cup lid 100, thus optimizing the overall feel of the cup lid 100.
[0044] The thickness of the first, second, and third annular grooves is less than the thickness of the steel sheet body, which facilitates heat conduction, reduces temperature difference attenuation, and improves the sensitivity of the color change of the temperature change indication layer.
[0045] The green, orange-yellow, and red reversible thermosensitive color developing inks all have a temperature tolerance range of -10 to 120℃, so there is no need to worry about the reversible color performance being damaged. The cup lid 100 can be used in a wide range of water temperatures.
[0046] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A scalding injury prevention intelligent cup cover based on heat-sensitive discoloration for distinguishing the water temperature in the cup, characterized in that, include: The cup lid body has a handle at the top; A stainless steel sheet is disposed in the cup lid body; The stainless steel sheet has a main body, on which a first annular groove, a second annular groove, and a third annular groove are formed. The first annular groove is located on the inner ring of the steel sheet body and is coated with a green reversible thermosensitive color-changing ink with a color-changing temperature of 24-26℃, forming a green temperature-changing indication layer. The second annular groove is located in the middle ring of the steel sheet body and is coated with an orange-yellow reversible thermosensitive color-changing ink with a color-changing temperature of 34-36℃, forming an orange-yellow temperature-changing indication layer. The third annular groove is located on the outer ring of the steel sheet body and is coated with a red reversible thermosensitive color-changing ink with a color-changing temperature of 49-51℃ to form a red temperature-changing indication layer.
2. The heat-sensitive color-changing anti-scalding smart cup lid according to claim 1, characterized in that: wherein The main body of the cup lid is made of transparent rigid polypropylene (PP).
3. The heat-sensitive color-changing anti-scalding smart cup lid according to claim 2, characterized in that: wherein, The lower sides of the cup lid body are curved inwards to form a groove with the upper part of the cup lid body, and the stainless steel sheet is embedded in the groove.
4. The heat-sensitive color-changing anti-scalding smart cup lid according to claim 1, characterized in that: wherein The thickness of the steel sheet body is 1mm, and the thickness of the first annular groove, the second annular groove and the third annular groove are all 0.5mm.
5. The heat-sensitive color-changing anti-scalding smart cup lid according to claim 1, characterized in that: wherein The first annular groove, the second annular groove, and the third annular groove are arranged at equal intervals, with a spacing of 0.8 cm.
6. The heat-sensitive color-changing anti-scalding smart cup lid according to claim 5, characterized in that: wherein The widths of the first annular groove, the second annular groove, and the third annular groove are all 0.4 cm.
7. The heat-sensitive color-changing anti-scalding smart cup lid according to claim 1, characterized in that: wherein The temperature tolerance range of the green reversible thermosensitive color developing ink, the orange-yellow reversible thermosensitive color developing ink, and the red reversible thermosensitive color developing ink is -10 to 120°C.
Citation Information
Patent Citations
Anti-scalding cup lid or kettle lid
CN202226179U
Fluorescent cup cover with temperature measuring effect
CN202981349U