Lightweight automobile rearview mirror

Abstract

The utility model relates to the technical field of electrochromic rearview mirrors, in particular to a light-weight automobile rearview mirror, the sealing performance and durability of a product are remarkably improved through a double-ring sealing structure, and meanwhile, the risk of medium leakage caused by temperature difference and external environment change is effectively reduced; the nanometer aerogel heat insulation layer is additionally arranged in the double-ring sealing structure, layered protection of the inner ring sealing ring and the outer ring sealing ring and application of the nanometer aerogel heat insulation layer ensure long-term stable color changing performance, and the efficient function can be kept even under extreme conditions. According to the scheme, the production efficiency of a product is improved, the service life of the product is prolonged, the ageing resistance and permeation resistance of the rearview mirror are further enhanced, and a more reliable and durable rearview mirror solution is provided for high-end new energy automobiles.

Description

Technical Field

[0001] This application relates to the field of electrochromic rearview mirror technology, and in particular to a lightweight automotive rearview mirror. Background Technology

[0002] With the acceleration of automotive intelligence and electrification, electrochromic technology, due to its ability to dynamically adjust light transmittance, has shown great application potential in the field of automotive rearview mirrors. Compared with traditional mechanical anti-glare rearview mirrors, it has a faster response speed, lower energy consumption, and does not require a complex mechanical structure. It has become a standard feature in high-end models and is gradually penetrating the mid-range market.

[0003] Early electrochromic rearview mirrors generally used a framed design. While this structure ensured mechanical strength and sealing, the presence of the metal frame increased the overall weight, and the frame also obstructed the edges of the mirror, affecting the integrity of the view and aesthetics. With the increasing demand for lightweight vehicles and simplified interiors, the traditional framed design can no longer meet market needs.

[0004] To address the aforementioned issues, the industry is gradually shifting towards the development of lightweight automotive rearview mirrors. Taking our company's first-generation product (publication number CN212060826U) as an example, it achieves a frameless design through structural innovation. This design abandons the traditional metal frame, utilizing the difference in substrate size to conceal internal components, resulting in a completely flat mirror surface and reducing the ineffective area to less than 1.5mm. Compared to framed products, its weight is reduced by approximately 15%, and its appearance better meets the minimalist aesthetic requirements of modern automobiles.

[0005] In the first-generation product, the single-ring sealing ring design and simple sealing method can lead to aging and cracking of the adhesive due to long-term vibration or temperature changes, causing media leakage or moisture intrusion, affecting the product's color-changing performance and lifespan. With the increasing demands for stability in lightweight automotive rearview mirrors from new energy vehicles, there is still room for further optimization in the first-generation frameless product. Utility Model Content

[0006] In order to improve the stability of our existing frameless car rearview mirror, this application provides a lightweight car rearview mirror.

[0007] The lightweight automotive rearview mirror provided in this application adopts the following technical solution:

[0008] A lightweight automotive rearview mirror includes a mirror body, the mirror body comprising a first transparent substrate and a second transparent substrate, a transparent conductive layer being disposed on the rear surface of the first transparent substrate, a reflective and conductive laminate being disposed on the front surface of the second transparent substrate, an electrochromic medium being disposed between the first transparent substrate and the second transparent substrate, and a mirror support plate being disposed on the rear surface of the second transparent substrate.

[0009] A sealing ring is provided on the front surface edge of the second transparent substrate. The sealing ring includes an inner ring sealing ring and an outer ring sealing ring. A nano-aerogel heat insulation layer is filled between the inner ring sealing ring and the outer ring sealing ring. The inner ring sealing ring is provided with a first notch, and the outer ring sealing ring is provided with a second notch that communicates with the first notch. A temporary sealing film is provided on the first notch, and a flexible sealing layer is provided on the second notch.

[0010] By adopting the above technical solution, the double-ring structure design provides layered protection. The inner ring is responsible for the short-term sealing of the medium filling channel, while the outer ring is responsible for long-term environmental protection. The division of labor is clear, avoiding the risk of long-term aging of a single rubber ring due to gaps. The nano-aerogel insulation layer reduces heat conduction between the inner and outer rings, reducing the impact of temperature differences on the inner ring seal and further reducing the risk of leakage. The double-ring structure provides dual protection. Even if the inner ring has a potential leakage risk due to filling gaps, the outer ring can still block external contaminants.

[0011] Optionally, the inner ring seal is made of photocurable resin material, and the outer ring seal is made of silicone rubber material.

[0012] By adopting the above technical solution, the photocurable resin inner ring seal provides high strength and durability, while the silicone rubber outer ring seal provides good elasticity and anti-aging properties, reducing the risk of leakage due to aging and cracking of the colloid.

[0013] Optionally, the first notch and the second notch are circumferentially offset by 30°-60°.

[0014] By adopting the above technical solution, the gaps of the inner and outer ring seals are staggered at a certain angle to form a non-linear filling path, reducing the risk of external contaminants directly entering through the gaps.

[0015] Optionally, the temporary sealing film is a photocurable sealing film.

[0016] By adopting the above technical solutions, the photocurable sealing film can be cured quickly, providing an immediate sealing effect and ensuring that leakage or moisture intrusion is avoided during the manufacturing process, thus guaranteeing the stability of the electrochromic medium. At the same time, by controlling the light exposure time and intensity, the thickness and hardness of the photocurable sealing film can be precisely controlled, ensuring that the sealing film has a consistent and stable effect.

[0017] Optionally, the flexible sealing layer is made of high-temperature resistant silicone rubber and has a thermosetting adhesive layer coated on its surface.

[0018] By adopting the above technical solution, and selecting high-temperature resistant silicone rubber material and heating to cure the adhesive layer, the aging resistance and high-temperature resistance of the sealing gasket are improved, further enhancing the reliability and long-term stability of the mirror body. The combination of these two aspects provides higher performance assurance for the rearview mirror, making it suitable for applications such as automotive rearview mirrors that are frequently exposed to sunlight and experience significant temperature fluctuations during driving.

[0019] In summary, the beneficial effects of this application are as follows: The combination of a double-ring sealing structure, a light-cured sealing film, and a high-temperature resistant silicone rubber flexible sealing layer significantly improves the product's sealing performance and durability, while effectively reducing the risk of media leakage caused by temperature differences and changes in the external environment. The layered protection of the inner and outer ring sealing rings and the application of a nano-aerogel heat insulation layer ensure long-term stable color-changing performance, maintaining high efficiency even under extreme conditions. This solution not only improves product manufacturing efficiency and service life but also further enhances the rearview mirror's anti-aging and anti-permeability properties, providing a more reliable and durable rearview mirror solution for high-end new energy vehicles. Attached Figure Description

[0020] Figure 1 This is the front view of an embodiment of this application.

[0021] Figure 2 This is a side sectional view of an embodiment of this application.

[0022] Figure 3 This is a side sectional view of the sealing ring.

[0023] Explanation of reference numerals in the attached drawings: 1. Mirror body; 2. First transparent substrate; 3. Second transparent substrate; 4. Transparent conductive layer; 5. Reflective and conductive laminate; 6. Electrochromic medium; 7. Mirror support plate; 8. First conductive adhesive; 9. Second conductive adhesive; 10. Sealing ring; 11. Inner ring sealing ring; 111. First notch; 112. Temporary sealing film; 12. Outer ring sealing ring; 121. Second notch; 122. Flexible sealing layer; 13. Nano-aerogel insulation layer; 131. Channel; 14. Metal ring. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0025] This application discloses a lightweight automotive rearview mirror. (Refer to...) Figure 1 and Figure 2 The lightweight automotive rearview mirror includes a mirror body 1, which includes a first transparent substrate 2 and a second transparent substrate 3. The rear surface of the first transparent substrate 2 is coated with a transparent conductive layer 4, which is used to transmit current to drive an electrochromic reaction. The front surface of the second transparent substrate 3 is coated with a reflective and conductive stack 5, which is used to reflect light and transmit current.

[0026] A space is formed between the first transparent substrate 2 and the second transparent substrate 3 by a spacer, and the space is filled with an electrochromic medium 6. A mirror support plate 7 is fixedly mounted on the rear surface of the second transparent substrate 3.

[0027] In this embodiment, the first transparent substrate 2 faces the driver's position, and the second transparent substrate 3 is opposite to the first transparent substrate 2. The thickness of the first transparent substrate 2 is between 2.8mm and 3.5mm, and it is a glass substrate with a chemically strengthened surface, such as soda-lime glass or high-alumina-silicate glass.

[0028] The second transparent substrate 3 is also a glass substrate, which can be soda-lime glass or borosilicate glass, with a thickness between 1.1mm and 1.8mm. The surface of the second transparent substrate 3 is treated with edge grinding and chamfering to reduce edge stress.

[0029] The first transparent substrate 2 is approximately 0.5mm-2.0mm larger in circumference than the second transparent substrate 3. During bonding, the first transparent substrate 2 and the second transparent substrate 3 are aligned and bonded together.

[0030] The transparent conductive layer 4 is an indium tin oxide (ITO) layer, used to drive the redox reaction of the electrochromic medium 6. The reflective and conductive stack 5 is a functional layer plated on the front surface of the second transparent substrate 3, which has the functions of reflecting light and conducting electricity. It is a metal-dielectric stack structure. This application uses a silver-ITO stack as an example.

[0031] An auxiliary electrode with a defined range is deposited beneath the second transparent substrate 3. The auxiliary electrode extends from the periphery of the second transparent substrate 3 towards the center, with a width of 1mm-5mm, and extends to the cross-section of the second transparent substrate 3 on the other side. The length of the auxiliary electrode is less than half the outer perimeter of the second transparent substrate 3. The auxiliary electrode is covered with a first conductive adhesive 8, the length of which is at least 0.9 times the length of the auxiliary electrode.

[0032] The back of the first transparent substrate 2 is provided with a stack of deposited metal material and transparent conductive material. A metal ring 14 is first deposited around the back of the first transparent substrate 2. The range of the metal ring 14 extends from the outermost part of the back of the first transparent substrate 2 to the center of the first transparent substrate 2. The width of the metal ring 14 is 3mm-10mm from the outermost part to the inner part. The stack is covered with a second conductive adhesive 9. The length of the second conductive adhesive 9 is less than half the circumference of the first transparent substrate 2.

[0033] Reference Figure 3A sealing ring 10 is bonded to the edge between the rear surface of the first transparent substrate 2 and the front surface of the second transparent substrate 3. The sealing ring 10 includes an inner ring sealing ring 11 and an outer ring sealing ring 12. The inner ring sealing ring 11 is made of light-curing resin material, and the outer ring sealing ring 12 is made of silicone rubber material. A nano-aerogel heat insulation layer 13 is filled between the inner ring sealing ring 11 and the outer ring sealing ring 12.

[0034] The inner ring sealing ring 11 has a first notch 111, and the outer ring sealing ring 12 has a second notch 121 that communicates with the first notch 111. The first notch 111 and the second notch 121 are circumferentially offset by 30°-60° to form a non-linear filling path, reducing the risk of direct intrusion of external contaminants. A channel 131 is formed in the nano-aerogel insulation layer 13, connecting the first notch 111 and the second notch 121. The electrochromic medium 6 sequentially fills the space between the inner ring sealing ring 11 and the outer ring sealing ring 12 through the second notch 121, the channel 131, and the first notch 111.

[0035] After filling is completed, the first gap 111 is sealed with a temporary sealing film 112, which is a light-curing sealing film; then the second gap 121 is sealed with a flexible sealing layer 122, which is made of high-temperature resistant silicone rubber and coated with a thermosetting adhesive layer, which can be fixed by heat curing.

[0036] The implementation principle of a lightweight car rearview mirror in this application embodiment is as follows: the lightweight car rearview mirror adopts a frameless design and uses a double-ring sealing structure in conjunction with a nano-aerogel heat insulation layer 13 to ensure long-term stable performance and effectively reduce the risk of media leakage caused by temperature difference and external environmental changes.

[0037] During installation, after the electrochromic medium 6 is filled, it is cured by ultraviolet irradiation, immediately forming a temporary sealing film 112 to seal the first gap 111. Subsequently, heat curing is used to form a flexible sealing layer 122, further improving the reliability of the seal.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A light-weighted automobile rearview mirror, characterized by comprising: The mirror body (1) comprises a first transparent substrate (2) and a second transparent substrate (3), the rear surface of the first transparent substrate (2) is provided with a transparent conductive layer (4), the front surface of the second transparent substrate (3) is provided with a reflective and conductive layer (5), an electrochromic medium (6) is arranged between the first transparent substrate (2) and the second transparent substrate (3), and the rear surface of the second transparent substrate (3) is provided with a mirror backplate (7); The front surface edge of the second transparent substrate (3) is provided with a sealing rubber ring (10), the sealing rubber ring (10) comprises an inner ring sealing ring (11) and an outer ring sealing ring (12), and a nano aerogel heat insulation layer (13) is filled between the inner ring sealing ring (11) and the outer ring sealing ring (12); the inner ring sealing ring (11) is provided with a first gap (111), the outer ring sealing ring (12) is provided with a second gap (121) which is communicated with the first gap (111), the first gap (111) is provided with a temporary sealing film (112), and the second gap (121) is provided with a flexible sealing layer (122).

2. The light-weight automotive rearview mirror according to claim 1, characterized in that: The inner ring sealing ring (11) is made of photocuring resin material, and the outer ring sealing ring (12) is made of silicone rubber material.

3. The light-weight automotive rearview mirror according to claim 2, characterized in that: The first gap (111) and the second gap (121) are circumferentially staggered by 30-60 degrees.

4. The light-weight automotive rearview mirror according to claim 2, wherein: The temporary sealing film (112) is a photocuring sealing film.

5. The light-weight automotive rearview mirror according to claim 4, characterized in that: The flexible sealing layer (122) is made of high-temperature-resistant silicone rubber material and is coated with a heat-cured glue layer on the surface.

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