Lens assembly capable of rapidly changing color at low temperature and ski goggles

Abstract

The invention provides a lens assembly capable of rapidly changing color at low temperature, which comprises an outer protective layer, a heat insulation layer and a photochromic layer, the outer protective layer, the heat insulation layer and the photochromic layer are sequentially arranged from outside to inside, and the heat insulation layer has a heat insulation function, so that the photochromic layer can be isolated from an external cold environment; when the ski goggles are worn on the face of a person, heat of the face of the person can be transmitted to the photochromic layer located on the inner side of the heat insulation layer, and therefore the temperature of the photochromic layer is further increased; the problem that the change rate of the transmittance of the photochromic layer in response to the light intensity is reduced due to low temperature is greatly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of glasses, and particularly to a lens assembly that can quickly change color at low temperature and a ski goggle. Background Art

[0002] Transmittance (or light transmittance) refers to the ratio of the intensity of light passing through a medium to the intensity of the incident light, and is used to measure the light transmission ability of a material. Transmittance is usually expressed as a percentage. For example, glass, transparent plastics, etc. have high transmittance, and their transmittance values are close to 100% or 1; while metals, dark filters, etc. have low transmittance, and their transmittance values are close to 0.

[0003] There are many types of glasses with protective functions for the eyes on the market, having effects such as anti-blue light, anti-infrared, anti-fog, color-changing, or polarization, etc. Photochromic lenses can adaptively adjust the dyeing depth according to the intensity of ultraviolet light, thereby adjusting the transmittance, and thus have been widely used. For example, photochromic lenses are increasingly used in ski goggles at present. When strong light irradiates the photochromic lens, the lens presents a dark color; when the light becomes dim, the color of the lens becomes lighter accordingly. One implementation of the photochromic lens can be composed of a lens containing microcrystals such as silver halide and copper oxide.

[0004] However, in a cold environment, for example, in snowy areas or some high-altitude areas, the response rate of the photochromic lens to the change in the intensity of ultraviolet light and thus the color change is significantly reduced. As Figure 1 shown, the solid line and the dotted line respectively represent the characteristic curves of the transmittance of the photochromic lens changing in response to the change in light intensity at room temperature and in a low-temperature cold environment. Among them, the vertical axis represents the transmittance of the photochromic lens, expressed as a percentage; the horizontal axis represents time, and at time t0, the photochromic lens enters a low-light environment from a strong-light environment; at time t1, the photochromic lens enters a strong-light environment from a low-light environment. It can be seen that in a cold environment, when the photochromic lens enters a low-light environment from a strong-light environment, the rising rate of its transmittance is significantly lower than that in a room-temperature environment; and when entering a strong-light environment from a low-light environment again, the falling rate of the transmittance of the photochromic lens is also lower than that in a room-temperature environment.

[0005] It can be concluded that in a low-temperature environment, the transmittance of the photochromic lens significantly decreases in response to the change rate of light intensity. This characteristic easily leads to the situation in some cold regions that when the photochromic lens is under low-temperature conditions and the user walks from a strong-light environment outdoors to a weak-light environment indoors (for example, when a skier wearing snow goggles with photochromic lenses enters the ski hall from the ski resort), the color-changing lens fails to change color in time and the vision becomes blurred, causing unnecessary safety hazards. Moreover, if the stay time in the weak-light environment is not long enough, the color-changing lens may not even return to the optimal transmittance in time, which will greatly affect the user experience. Summary of the Invention

[0006] Therefore, in view of at least one of the above problems, the present invention provides a lens assembly and a ski goggle that can quickly change color at low temperatures.

[0007] The present invention is implemented as follows:

[0008] The present invention provides a lens assembly that can quickly change color at low temperatures, including an outer protective layer, a heat-insulating layer, and a photochromic layer. When the lens assembly is worn on the user's face, the side facing the wearer is defined as the inner side, and the opposite side is defined as the outer side. It is characterized in that the outer protective layer, the heat-insulating layer, and the photochromic layer are sequentially arranged from outside to inside.

[0009] Wherein, in one embodiment, the photochromic layer is a photochromic material layer sensitive to ultraviolet light, and further includes an ultraviolet light barrier layer, and the ultraviolet light barrier layer is arranged at a position more inside than the photochromic layer.

[0010] Wherein, in one embodiment, it further includes an auxiliary function layer, and the auxiliary function layer includes one or more of an anti-fog layer, an oil-repellent and anti-fouling layer, an anti-reflection layer, a polarizing layer, an explosion-proof layer, an anti-static layer, and an antibacterial layer.

[0011] Wherein, in one embodiment, the auxiliary function layer is a functional film layer attached to the lens body or functional materials are distributed in the lens body.

[0012] Wherein, in one embodiment, the outer protective layer is constructed by an outer lens, the photochromic layer is constructed by an inner lens, and a spacer is arranged between the outer lens and the inner lens, and an air gap is constructed between the outer lens and the inner lens through the spacer to form the heat-insulating layer.

[0013] Wherein, in one embodiment, the spacer is a foam material, and the spacer is arranged along the periphery of the outer protective layer or the photochromic layer, so that the spacer, the outer protective layer, and the photochromic layer jointly enclose a spatial structure.

[0014] Among them, in one embodiment, the outer protective layer is an impact-resistant lens.

[0015] Among them, in one embodiment, the photochromic layer is a photochromic film layer attached to the lens body; or photochromic materials are distributed in the lens body; or it is made by immersing the lens body in a solution; or it is a sandwich layer in the middle of the lens body.

[0016] Among them, in one embodiment, the heat-insulating layer is a light-transmitting and heat-insulating plastic lens layer.

[0017] The present invention also provides a ski goggle, which includes a frame and the above-mentioned lens assembly capable of rapidly changing color at low temperature installed on the frame.

[0018] Through the technical solution provided by the present invention, the following technical effects are achieved:

[0019] The present invention provides a lens assembly capable of rapidly changing color at low temperature and a ski goggle including the lens assembly. The lens assembly includes an outer protective layer, a heat-insulating layer, and a photochromic layer. The outer protective layer, the heat-insulating layer, and the photochromic layer are sequentially arranged from outside to inside. The heat-insulating layer has a heat-insulating function, so that the photochromic layer can be isolated from the cold environment outside, enabling the photochromic layer to be away from the low-temperature environment. And when the ski goggle is worn on a person's face, the heat of the person's face can be transferred to the photochromic layer inside the heat-insulating layer, thereby further increasing the temperature of the photochromic layer, and greatly improving the problem that the transmittance of the photochromic layer in response to the change rate of light intensity decreases due to low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a characteristic curve graph showing the change of the transmittance of a photochromic lens in response to the change of light intensity at two different temperatures;

[0021] Figure 2 It is a perspective view of a ski goggle according to the first embodiment of the present invention;

[0022] Figure 3 It is a perspective view of the ski goggle in another direction of this embodiment;

[0023] Figure 4 It is a perspective view of the lens assembly of this embodiment;

[0024] Figure 5 It is an exploded view of the lens assembly of this embodiment;

[0025] Figure 6 It is a structural schematic diagram of the lens assembly of this embodiment;

[0026] Figure 7 It is a schematic diagram of the ski goggle of this embodiment affected by body temperature;

[0027] Figure 8 It is a schematic structural diagram of the lens assembly according to the second embodiment of the present invention;

[0028] Figure 9 It is a schematic structural diagram of the lens assembly in the prior art. Detailed implementation manners

[0029] To further illustrate the embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0030] The present invention will be further described below in conjunction with the drawings and specific implementation manners.

[0031] Embodiment 1

[0032] As Figure 2-7 shown, this embodiment provides a pair of glasses, especially a ski goggle 1, as Figure 2 shown, wherein the ski goggle 1 includes a lens assembly 10, a frame 20, and a strap 30. The lens assembly 10 is installed on the frame 20, and the strap 30 is connected to the frame 20 to be used for basically fixing the ski goggle 1 at a fixed position on the wearer's head and face.

[0033] In a traditional ski goggle, the structure of its lens assembly 10' is as Figure 9 shown, which includes an outer protective lens 11' with ultraviolet light blocking, an inner lens 14' with anti-fogging, a spacer foam layer 12' between the outer protective lens 11' and the inner lens 14', and a photochromic layer 13' attached to the outermost layer of the outer protective lens 11'. The outer protective lens 11' is usually a UV400 filter. Those of ordinary skill in the art will understand that some implementations of the UV400 filter have an average transmittance of less than or equal to 0.5% in the wavelength range from 280 nm to 400 nm. That is, the outer protective lens 11' has the function of filtering ultraviolet light. For example, the outer protective lens 11' is made of polycarbonate (PC) materials such as CLS-2400 or CLS-3400 produced by Mitsubishi Corporation. The photochromic layer 13' can usually be a photochromic lens.

[0034] Photochromic lenses can respond to light of a specific wavelength band and undergo reversible color changes to improve visual comfort and enhance the protection ability against harmful light. According to different types of light, the photochromic lenses include the following types:

[0035] 1. UV-sensitive photochromic lenses: Such lenses have a response characteristic to ultraviolet rays (UVA, UVB). Their photochromic materials include organic molecules such as spiropyrans, oxazines, spiroindolines, or inorganic materials such as silver halides (e.g., silver chloride, silver bromide). When irradiated with ultraviolet rays, the photochromic molecules undergo reversible structural changes, causing the lens color to deepen; when the ultraviolet rays decrease, the molecules return to their original state and the lens color fades.

[0036] 2. Visible light (high-energy blue light)-sensitive photochromic lenses: Such lenses have a response characteristic to high-energy blue light (wavelength 400 - 500 nm). Their photochromic materials include modified spiropyrans and specific organometallic compounds (such as transition metal complexes). Under blue light irradiation, the photochromic molecules undergo electron transitions or structural changes, causing the lens color to deepen, thereby reducing the blue light transmittance and reducing the potential damage of blue light to the eyes.

[0037] 3. Infrared-sensitive photochromic lenses: Such lenses have a response characteristic to near-infrared rays (wavelength 700 - 1400 nm). Their photochromic materials include inorganic nanoparticles (such as tungsten oxide WO3, vanadium oxide VO2) and certain liquid crystal photochromic materials. Under infrared irradiation, the material undergoes electronic structure changes or phase transitions (such as VO2 changing from an insulating state to a conductive state), resulting in changes in the color or transparency of the lens, thereby regulating the infrared transmittance and improving the optical adjustment performance of the lens.

[0038] Photochromic lenses can use a single type of photochromic material or a composite structure of multiple photochromic materials to achieve a comprehensive response to light in different bands, further enhancing their color-changing performance and application range.

[0039] For the photochromic layer 13' using a UV-sensitive material, in order to prevent ultraviolet light from being blocked by the outer protective lens 11', in traditional ski goggles, the photochromic layer 13' is usually disposed outside the outer protective lens 11' to smoothly achieve the color-changing effect. However, this also makes the photochromic layer 13' directly contact with the low-temperature external environment, which will cause the situation described above for the photochromic layer 13', that is, in a low-temperature environment, the problem that the transmittance response rate of the photochromic lens to the change in light intensity is significantly reduced, that is, as Figure 1 the curve represented by the dotted line shown.

[0040] As Figure 2-7As shown, in this embodiment, the lens assembly 10 is a lens assembly that can quickly change color at low temperatures. The lens assembly 10 includes an outer protective layer 11, a heat insulation layer 12, a photochromic layer 13, an ultraviolet light barrier layer 14, and an auxiliary function layer 15. When the lens assembly 10 is worn on the user's face, the side facing the wearer is defined as the inner side, and the opposite side is the outer side. The outer protective layer 11, the heat insulation layer 12, the photochromic layer 13, the ultraviolet light barrier layer 14, and the auxiliary function layer 15 of the lens assembly 10 are arranged in sequence from the outside to the inside. The outer protective layer 11 is arranged on the outermost side of the lens assembly 10, the heat insulation layer 12 is arranged on the inner side of the outer protective layer 11, and the photochromic layer 13 is arranged between the heat insulation layer 12 and the ultraviolet light barrier layer 14, so that the photochromic layer 13 is located in a more outer position than the ultraviolet light barrier layer 14 to prevent the function of the photochromic layer 13 from failing. Of course, the ultraviolet light barrier layer 14 can also be arranged on the inner side of the auxiliary function layer 15, and the ultraviolet light barrier layer 14 is also arranged in a position more inner than the photochromic layer 13. In this embodiment, the ultraviolet light barrier layer 14 is composed of a UV400 filter and has the function of filtering ultraviolet light.

[0041] Since the heat insulation layer 12 has the function of heat insulation, it can isolate the photochromic layer 13 from the cold environment outside, so that the photochromic layer 13 is far from the low-temperature environment. The so-called heat insulation function refers to the function of physically hindering the transfer of heat between the hot end and the cold end. The constituent material of the heat insulation layer 12 is usually a poor conductor of heat, such as air, organic plastic, glass, etc. And, as Figure 3-5 、 Figure 7 shown, with reference to Figure 7 emphatically, when the ski goggles 1 are worn on a person's face, the heat E of the person's face can be transferred to the photochromic layer 13 on the inner side of the heat insulation layer 12, thereby further increasing the temperature of the photochromic layer 13 and greatly improving the problem that the transmittance change rate of the photochromic layer 13 in response to the light intensity decreases due to low temperature.

[0042] In this embodiment, the photochromic layer 13 is a photochromic material layer sensitive to ultraviolet light. Specifically, the photochromic layer 13 is an inner lens containing a photochromic material sensitive to ultraviolet light. Thus, the outer protective layer 11 of this embodiment is made of a common outer lens material, and this lens material does not have the function of filtering ultraviolet light, so it does not affect the photochromism of the photochromic layer 13 to provide a protective function. For example, this lens material is the S1000 polycarbonate (PC) material produced by Mitsubishi Corporation. More specifically, the outer protective layer 11 is an impact-resistant outer lens made of PC material, providing an impact-resistant protective function. Of course, in the application of other embodiments, optical lenses made of other materials with good impact resistance and good light transmittance can also be used, such as triptycene dicarboxylate resin (Trivex), polyurethane (Polyurethane), polyamide (PA), etc.

[0043] In this embodiment, the photochromic layer 13 is a sandwich layer located in the middle of the lens body, but it is not limited thereto. In some other embodiments, the photochromic layer 13 can be a photochromic film layer attached to the outer surface of the lens body such as the auxiliary function layer 15 or the ultraviolet light barrier layer 14. This structure occupies less space and the product is more compact. Of course, in some embodiments, the photochromic layer 13 can also be made by immersing the lens body in a solution. Or, the photochromic layer 13 is to distribute the photochromic material in the lens body. The manufacturing method of the photochromic layer 13 is a relatively mature technology in the existing eyewear industry, and will not be elaborated in detail here one by one.

[0044] In this embodiment, due to the intense exercise characteristics of skiing, the temperature rise inside the skiing goggles is large and the humidity is high. Therefore, the auxiliary function layer 15 usually adopts an anti-fog layer to avoid the occurrence of fogging problems during wearing.

[0045] Of course, in some other embodiments, the auxiliary function layer 15 may further include one or more of an oleophobic and antifouling layer, an antireflection layer, a polarizing layer, an explosion-proof layer, an antistatic layer, and an antibacterial layer to provide more functions and further enhance the protection effect. Moreover, other types of auxiliary function layers 15 other than these antifogging layers are not limited to being provided on the inner side of the photochromic layer 13. According to the different functions of the auxiliary function layer 15, the auxiliary function layer 15 can be provided at an inner, outer, or middle position of the lens assembly 10 to meet the requirements of actual applications. For example, in some embodiments, the auxiliary function layer 15 includes a polarizing layer, so the polarizing layer is provided on the outermost side, making the lens assembly have a polarizing function, capable of filtering out chaotic light, reducing glare generated by reflection on water surfaces, snow, or sunlight, and being able to reduce strong light stimulation, improve visual clarity, and relieve visual fatigue. Or, the auxiliary function layer 15 includes an oleophobic and antifouling layer, so the oleophobic and antifouling layer is provided on the innermost side to prevent the inner lens from being contaminated by the user's fingers; or, the auxiliary function layer 15 includes an explosion-proof layer, and the explosion-proof layer is provided at the middle position to prevent damage to the eyes of the exerciser caused by the breakage of the inner lens.

[0046] The auxiliary function layer 15 can be a functional film layer attached to the lens body or made by distributing functional materials within the lens body. For example, the auxiliary function layer 15 can be a functional film layer attached to the outer surface of the lens body; or, the auxiliary function layer 15 is a coating on the lens body. This structure occupies less space and the product is more compact. Of course, in some embodiments, the auxiliary function layer 15 can also be made by immersing the lens in a solution; or, the auxiliary function layer 15 is made by distributing functional materials within the lens body; or, the auxiliary function layer 15 is a sandwich layer in the middle of the lens body. The manufacturing methods for forming the auxiliary function layer 15 are also relatively mature technologies in the existing eyewear industry, and will not be elaborated in detail here one by one.

[0047] The heat insulation layer 12 has a heat insulation function. The heat insulation layer 12 includes a spacer 121 provided between the outer protection layer 11 and the photochromic layer 13. An air gap is directly constructed between the outer protection layer 11 and the photochromic layer 13 through the spacer 121 to form the heat insulation layer 12. This structure is simple and easy to implement, and air is a good heat insulation medium, which can enhance the heat insulation effect of the heat insulation layer 12.

[0048] The spacer 121 can be a foam material, but is not limited thereto. The spacer 121 can be other suitable materials, such as foam.

[0049] In this embodiment, as Figure 4-5As shown, the spacer 121 is disposed around the periphery of the outer protective layer 11 or the photochromic layer 13, so that the spacer 121, the outer protective layer 11, and the photochromic layer 13 jointly enclose a space structure 122. The space structure 122 can be filled with air or other gases, or the space structure 122 is in a vacuum or near-vacuum environment, thereby providing good heat insulation performance, reducing the influence of the external cold temperature, and improving the heat insulation effect of the heat insulation layer 12. Of course, other heat insulation materials can be filled in the space structure 122 to further improve the heat insulation effect.

[0050] In some embodiments, the heat insulation layer 12 can also be a light-transmitting heat-insulating plastic lens layer, which is disposed between the outer protective layer 11 and the photochromic layer 13 to provide heat insulation function. The light-transmitting heat-insulating plastic lens layer can be made of polyurethane (such as TR-90, MR series, etc.) material, and the heat insulation is enhanced by nano additives.

[0051] Embodiment 2

[0052] As Figure 8 shown, in this embodiment, the lens assembly 10a is provided with a composite function layer 16, which simultaneously has the functions of the ultraviolet light barrier layer 14 and the auxiliary function layer 15, and replaces the ultraviolet light barrier layer 14 and the auxiliary function layer 15 in Embodiment 1. The rest of this embodiment is the same as that of Embodiment 1.

[0053] In this embodiment, the lens assembly 10a includes an outer protective layer 11, a heat insulation layer 12, a photochromic layer 13, and a composite function layer 16. When the lens assembly 10a is worn on the user's face, the side facing the wearer is defined as the inner side, and the opposite side is defined as the outer side. The outer protective layer 11, the heat insulation layer 12, the photochromic layer 13, and the composite function layer 16 of the lens assembly 10a are sequentially arranged from the outside to the inside. The composite function layer 16, for example, simultaneously has the functions of filtering ultraviolet light and anti-fogging. Specifically, the inner surface of the composite function layer 16 that already has the function of filtering ultraviolet light is treated to make it have an anti-fogging effect, and the treatment methods include but are not limited to impregnation, coating, etc. This structure is more concise, saves materials, and reduces costs.

[0054] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. A lens assembly capable of quickly changing color at low temperature, comprising an outer protective layer, a heat insulation layer, and a photochromic layer. When the lens assembly is worn on the user's face, the side facing the wearer is defined as the inner side, and the opposite side is defined as the outer side. It is characterized in that The outer protective layer, the heat insulation layer, and the photochromic layer are sequentially arranged from outside to inside.

2. The lens assembly capable of rapidly changing color at low temperature according to claim 1, wherein: The photochromic layer is a photochromic material layer sensitive to ultraviolet light, and further includes an ultraviolet light barrier layer, and the ultraviolet light barrier layer is arranged at a position more inside than the photochromic layer.

3. The lens assembly capable of rapidly changing color at low temperature according to claim 1 or 2, characterized in that: It further includes an auxiliary function layer, and the auxiliary function layer includes one or more of an anti-fog layer, an oleophobic and antifouling layer, an anti-reflection layer, a polarizing layer, an explosion-proof layer, an anti-static layer, and an antibacterial layer.

4. The lens assembly capable of rapidly changing color at low temperature according to claim 3, wherein: The auxiliary function layer is a functional film layer attached to the lens body or a functional material is distributed in the lens body.

5. The lens assembly capable of rapidly changing color at low temperature according to claim 1, wherein: The outer protective layer is constructed by an outer lens, the photochromic layer is constructed by an inner lens, a spacer is arranged between the outer lens and the inner lens, and an air gap is constructed between the outer lens and the inner lens through the spacer to form the heat insulation layer.

6. The lens assembly capable of rapid color change at low temperature according to claim 5, wherein: The spacer is a foam material, and the spacer is arranged to surround the periphery of the outer protective layer or the photochromic layer, so that the spacer, the outer protective layer, and the photochromic layer jointly enclose a spatial structure.

7. The lens assembly capable of rapidly changing color at low temperature according to claim 1, wherein: The outer protective layer is an impact-resistant lens.

8. The lens assembly capable of rapidly changing color at low temperature according to claim 1, characterized in that: The photochromic layer is a photochromic film layer attached to the lens body; or a photochromic material is distributed in the lens body; or is made by soaking the lens body in a solution; or is a sandwich layer in the middle of the lens body.

9. The lens assembly capable of rapidly changing color at low temperature according to claim 1, wherein: The heat insulation layer is a light-transmitting and heat-insulating plastic lens layer.

10. A ski goggle, comprising a frame, characterized in that, It further includes a lens assembly capable of rapidly changing color at low temperature according to any one of claims 1-9 and installed on the frame.

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