Composite glass cover plate
By processing fractal tree-shaped microgrooves on the surface of the inner layer of the composite glass cover and combining them with a multi-layer structure design, the problem of crack propagation during impact is solved, improving safety and energy absorption capacity and preventing overall breakage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU LEEN SMART GLASS CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-06-05
AI Technical Summary
Existing composite glass covers are prone to developing deep cracks when subjected to impact, which are difficult to suppress and pose a risk of overall collapse, resulting in insufficient safety in use.
The inner layer is designed as a crack-preventing plate structure, and fractal tree-shaped microgrooves are processed on its surface. The fractal tree-shaped microgrooves are branch grooves with progressively decreasing depths. They are formed by ultraviolet femtosecond laser direct writing technology. Combined with the design of a nano-ceramic reinforced glass layer, a transparent polyurethane and silica aerogel composite layer, and a UV-cured optical adhesive layer, a crack guiding structure with varying thickness and strength is formed.
It effectively prevents crack propagation, improves the absorption rate of single-point impact energy, avoids complete breakage of the glass cover, and enhances safety during use.
Smart Images
Figure CN224323700U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of glass cover technology, and in particular to a composite glass cover. Background Technology
[0002] Composite glass covers are a new type of material whose performance is enhanced through multi-layered composite materials and special processing techniques, thereby addressing the technical pain points of traditional glass, such as high brittleness, poor impact resistance, and easy breakage. Existing composite glass covers generally use chemical strengthening techniques (such as ion exchange processes) to increase the compressive stress on the glass surface; they also enhance the flexibility and cushioning performance of the glass cover by combining the advantages of different materials through a sandwich structure (such as glass + polymer + glass), for example, using polyurethane (TPU) or polyvinyl butyral (PVB) as an intermediate cushioning layer; and they incorporate ceramic particles (such as zirconium oxide) or nanomaterials (such as graphene) into the glass to improve the local hardness and thermal stability of the glass cover.
[0003] However, although chemical strengthening technology and other processes can effectively improve the structural strength and impact resistance of glass covers, they cannot solve the problem that composite glass covers are prone to deep cracks when subjected to impacts, and these cracks are difficult to suppress, which can easily cause the entire glass cover to break, posing a safety risk. Utility Model Content
[0004] Therefore, it is necessary to provide a composite glass cover to address the technical problem of insufficient crack resistance of existing glass cover plates.
[0005] A composite glass cover includes an outer layer, a middle layer, and an inner layer stacked in sequence. The composite glass cover also includes an adhesive layer, wherein one adhesive layer is disposed between the outer layer and the middle layer to tightly bond the outer layer and the middle layer; and another adhesive layer is disposed between the middle layer and the inner layer to tightly bond the middle layer and the inner layer, thereby forming a complete composite glass cover.
[0006] The inner layer is designed as a crack-proof plate structure.
[0007] The inner layer plate is provided with fractal tree-shaped microgrooves. The fractal tree-shaped microgrooves are set on the surface of the inner layer plate and are set as branch grooves with progressively decreasing depth, thereby forming a crack guiding structure with different thicknesses and strengths in the inner layer plate.
[0008] In one embodiment, the fractal tree-like microgrooves include a plurality of main grooves, a plurality of secondary grooves, and a plurality of final grooves. The plurality of main grooves extend onto the surface of the inner layer plate, and each main groove has a plurality of secondary grooves connected to its two side walls. The extension direction of each secondary groove is offset from the extension direction of the corresponding main groove by a preset angle, and each secondary groove has a plurality of final grooves connected to its two side walls. The extension direction of each final groove is offset from the extension direction of the corresponding secondary groove by a preset angle.
[0009] In one embodiment, each of the main slots described above is configured as a slot extending in a straight line with a preset length, width, and depth.
[0010] In one embodiment, the width of each main groove is set to 2-5 μm; the depth of each main groove is set to 8-10 μm.
[0011] In one embodiment, the aforementioned main slots are arranged parallel to each other in pairs.
[0012] In one embodiment, each of the aforementioned level slots is configured as a straight-line extending slot with a preset length, width, and depth.
[0013] In one embodiment, the length, width, and depth of each stage groove are respectively set to 50-70% of the length, width, and depth of the main groove.
[0014] In one embodiment, the branch angle between each stage slot and the corresponding main slot is set to 30-60°.
[0015] In one embodiment, each of the aforementioned final-stage slots is configured as a straight-line extending slot with a preset length, width, and depth.
[0016] In one embodiment, the length, width, and depth of each of the final-stage slots are respectively set to 70-80% of the length, width, and depth of the secondary slots.
[0017] In one embodiment, the branch angle between each final-stage slot and the corresponding secondary slot is set to 30-60°.
[0018] In one embodiment, each of the aforementioned level slots can be further configured as a multi-level branch structure.
[0019] In one embodiment, the branching level of each of the above-mentioned level slots can be set to 3-4 levels.
[0020] In one embodiment, each of the aforementioned final-stage grooves is provided with a spherical groove of a predetermined diameter at its end.
[0021] In one embodiment, the diameter of the spherical groove is set to 100-120% of the depth of the final groove.
[0022] In one embodiment, the fractal tree-like microgrooves on the surface of the inner layer plate are formed by direct writing with ultraviolet femtosecond laser.
[0023] In one embodiment, the outer layer is configured as a nano-ceramic reinforced glass layer.
[0024] In one embodiment, the thickness of the outer layer is set to 0.2 mm.
[0025] In one embodiment, the aforementioned intermediate layer is configured as a transparent polyurethane and silica aerogel composite layer.
[0026] In one embodiment, the thickness of the intermediate layer is set to 0.15 mm.
[0027] In one embodiment, the inner layer is configured as an ultrathin chemically strengthened glass layer.
[0028] In one embodiment, the thickness of the inner layer plate is set to 0.3 mm.
[0029] In one embodiment, the adhesive layer described above is made of UV-curable optical adhesive.
[0030] The aforementioned composite glass cover plate, by setting the inner layer plate as a crack propagation-preventing plate structure, enables the inner layer plate to achieve micro-crack self-termination when the composite glass cover plate is impacted, thereby preventing the crack propagation of the inner layer plate. The inner layer plate is provided with fractal tree-shaped microgrooves, which are set on the surface of the inner layer plate and are set as branch grooves with progressively decreasing depths. This creates a crack guiding structure with varying thicknesses and strengths in the inner layer plate. When the composite glass cover plate is subjected to an external impact within a certain limit, the crack generated at the impact point of the inner layer plate preferentially propagates along the extension path of the fractal tree-shaped microgrooves. During the crack propagation process, the stress is concentrated and guided and dissipated step by step. The thickness difference between the branch ends of the fractal tree-shaped microgrooves and the main body of the inner layer plate can blunt and stop the crack tip, thereby realizing the crack propagation prevention function of the inner layer plate, improving the single-point impact energy absorption rate, effectively avoiding personnel injury caused by complete breakage of the glass cover plate, and improving the safety of the composite glass cover plate. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the composite glass cover plate in one embodiment;
[0032] Figure 2 This is a schematic diagram of the exploded structure of a composite glass cover plate in one embodiment;
[0033] Figure 3 for Figure 2 An enlarged structural diagram of part M in the illustrated embodiment. Detailed Implementation
[0034] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.
[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical connection; 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 utility model according to the specific circumstances.
[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0040] Please see Figures 1 to 3 This utility model discloses a composite glass cover plate 10, which includes an outer layer plate 100, a middle layer plate 200, and an inner layer plate 300 stacked in sequence. Based on this, the composite glass cover plate 10 also includes adhesive layers 400, one adhesive layer 400 being disposed between the outer layer plate 100 and the middle layer plate 200 to tightly bond the outer layer plate 100 and the middle layer plate 200; and another adhesive layer 400 being disposed between the middle layer plate 200 and the inner layer plate 300 to tightly bond the middle layer plate 200 and the inner layer plate 300, thereby forming the composite glass cover plate 10 as a whole. The inner layer plate 300 is configured as a crack-prevention plate structure. When the composite glass cover plate 10 is impacted, the inner layer plate 300 can achieve a self-termination effect of microcracks, thereby preventing the cracks in the inner layer plate 300 from spreading. Specifically, the inner layer plate 300 is provided with fractal tree-shaped microgrooves a, which are disposed on the surface of the inner layer plate 300. The fractal tree-shaped microgrooves a are branch grooves with progressively decreasing depths, thereby forming a crack guiding structure with varying thicknesses and strengths in the inner layer plate 300. When the composite glass cover plate 10 is subjected to an external impact within a certain limit, the crack generated at the impact point of the inner layer plate 300 preferentially propagates along the extension path of the fractal tree-shaped microgrooves a. During the crack propagation process, the stress is concentrated and guided and dissipated step by step. Due to the thickness difference between the branch ends of the fractal tree-shaped microgrooves a and the main body of the inner layer plate 300, the crack tip can be blunted and stopped, thereby realizing the crack propagation prevention function of the inner layer plate 300, improving the single-point impact energy absorption rate, effectively avoiding personnel injury that may be caused by the complete breakage of the glass cover plate, and improving the safety of the composite glass cover plate 10.
[0041] Furthermore, the fractal tree-shaped microgroove a includes several main grooves a1, several secondary grooves a2, and several final grooves a3. The main grooves a1 extend onto the surface of the inner layer plate 300, and several secondary grooves a2 are connected to the two side walls of each main groove a1. The extension direction of each secondary groove a2 is offset from the extension direction of the corresponding main groove a1 by a preset angle. The two side walls of each secondary groove a2 are connected to several final grooves a3. The extension direction of each final groove a3 is offset from the extension direction of the corresponding secondary groove a2 by a preset angle. Based on this, the fractal tree-shaped microgroove a forms a multi-level tree-shaped groove structure.
[0042] In one embodiment, each main groove a1 is configured as a straight-line extending groove with a preset length, width, and depth. Specifically, the width of each main groove a1 is set to 2-5 μm; the depth of each main groove a1 is set to 8-10 μm. In another embodiment, a plurality of main grooves a1 are arranged parallel to each other in pairs.
[0043] In one embodiment, each stage groove a2 is configured as a straight-line extending groove with a preset length, width, and depth. Specifically, the length, width, and depth of each stage groove a2 are respectively set to 50-70% of the length, width, and depth of the main groove a1. In another embodiment, the branch angle between each stage groove a2 and the corresponding main groove a1 is set to 30-60°.
[0044] In one embodiment, each final-stage groove a3 is configured as a straight-line extending groove with a preset length, width, and depth. Specifically, the length, width, and depth of each final-stage groove a3 are respectively set to 70-80% of the length, width, and depth of the secondary groove a2, to avoid excessively weakening the strength of the inner layer plate 300. In another embodiment, the branch angle between each final-stage groove a3 and the corresponding secondary groove a2 is set to 30-60°.
[0045] In one embodiment, each level groove a2 can be further configured as a multi-level branch structure. Specifically, each level groove a2 can be configured as 3-4 levels of branching to further extend the stress guiding and dispersing effect of the inner layer plate 300.
[0046] Furthermore, each final-stage groove a3 is end-of-stage with a spherical groove a31 of a predetermined diameter. This abrupt change in the radius of curvature blunts the crack tip and stops its propagation. Specifically, the diameter of the spherical groove a31 is set to 100-120% of the depth of the final-stage groove a3.
[0047] In one embodiment, the fractal tree-like microgrooves a on the surface of the inner layer plate 300 are formed by direct writing with ultraviolet femtosecond laser.
[0048] Furthermore, the outer layer 100 is configured as a nano-ceramic reinforced glass layer to enhance the surface strength of the composite glass cover 10. Specifically, the thickness of the outer layer 100 is set to 0.2 mm.
[0049] Furthermore, the intermediate layer is a transparent polyurethane and silica aerogel composite layer to enhance the flexible cushioning performance of the composite glass cover 10. Specifically, the thickness of the intermediate layer is set to 0.15 mm.
[0050] Furthermore, the inner layer is made of an ultra-thin chemically strengthened glass layer. Specifically, the thickness of the inner layer is set to 0.3 mm.
[0051] Furthermore, the adhesive layer 400 is made of UV-cured optical adhesive to ensure the interlayer bonding strength of the composite glass cover 10.
[0052] In summary, the composite glass cover disclosed in this utility model, by setting the inner layer plate as a crack propagation-preventing plate structure, enables the inner layer plate to achieve micro-crack self-termination when the composite glass cover plate is impacted, thereby preventing the crack propagation of the inner layer plate. The inner layer plate is provided with fractal tree-shaped microgrooves, which are set on the surface of the inner layer plate and are set as branch grooves with progressively decreasing depths, thus forming a crack guiding structure with varying thickness and strength in the inner layer plate. When the composite glass cover plate is subjected to an external impact within a certain limit, the crack generated at the impact point of the inner layer plate preferentially propagates along the extension path of the fractal tree-shaped microgrooves. During the crack propagation process, the stress is concentrated and guided and dissipated step by step. Due to the thickness difference between the branch ends of the fractal tree-shaped microgrooves and the main body of the inner layer plate, the crack tip can be blunted and stopped, thereby realizing the crack propagation prevention function of the inner layer plate, improving the single-point impact energy absorption rate, effectively avoiding personnel injury caused by complete breakage of the glass cover plate, and improving the safety of the composite glass cover plate.
[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0054] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A composite glass cover, characterized in that, include: The outer layer, middle layer, and inner layer are stacked in sequence; based on this, the composite glass cover also includes an adhesive layer, wherein one of the adhesive layers is disposed between the outer layer and the middle layer; and the other adhesive layer is disposed between the middle layer and the inner layer. The inner layer plate is configured as a crack-proof plate structure. The inner layer plate is provided with fractal tree-shaped microgrooves, which are disposed on the surface of the inner layer plate. The fractal tree-shaped microgrooves are configured as branch grooves with progressively decreasing depth, thereby forming a crack guiding structure with varying thickness and strength in the inner layer plate.
2. The composite glass cover plate according to claim 1, characterized in that, The fractal tree-like microgrooves include a plurality of main grooves, a plurality of secondary grooves, and a plurality of final grooves. The plurality of main grooves extend onto the surface of the inner layer plate, and each of the main grooves has a plurality of secondary grooves connected to its two side walls. The extension direction of each secondary groove is offset from the extension direction of the corresponding main groove by a preset angle, and each of the secondary grooves has a plurality of final grooves connected to its two side walls. The extension direction of each final groove is offset from the extension direction of the corresponding secondary groove by a preset angle.
3. The composite glass cover plate according to claim 2, characterized in that, The width of each main groove is set to 2-5 μm; the depth of each main groove is set to 8-10 μm.
4. The composite glass cover plate according to claim 3, characterized in that, The main channels are arranged in parallel to each other in pairs.
5. The composite glass cover plate according to claim 4, characterized in that, The length, width, and depth of each secondary slot are respectively set to 50-70% of the length, width, and depth of the main slot.
6. The composite glass cover plate according to claim 5, characterized in that, The branch angle between each secondary slot and the corresponding primary slot is set to 30-60°.
7. The composite glass cover plate according to claim 6, characterized in that, The length, width, and depth of each final-stage groove are respectively set to 70-80% of the length, width, and depth of the secondary groove.
8. The composite glass cover plate according to claim 7, characterized in that, The branch angle between each final-stage slot and the corresponding secondary slot is set to 30-60°.
9. The composite glass cover plate according to claim 8, characterized in that, Each of the final stage grooves is provided with a spherical groove of a preset diameter at its end.
10. The composite glass cover plate according to claim 9, characterized in that, The diameter of the spherical groove is set to 100-120% of the depth of the final groove.