Lens structure for accelerating water mist dispersion

Abstract

This application provides a lens structure for accelerating the dissipation of water mist, including a lens barrel with a lens groove, and a first lens and a second lens sequentially disposed at the front end of the lens groove. By pre-screening a screen-printed ink layer on the second lens and leaving an exhaust gap on the screen-printed ink layer, a first cavity formed between the first lens and the second lens can communicate with the inside of the lens. When mist is generated in the first cavity, the air in the first cavity exchanges with the air inside the lens, which accelerates the dissipation of mist and the air circulation. The temperature difference between the two cavities will decrease rapidly, thereby promoting the dissipation of mist.

Description

Technical Field

[0001] This application relates to the field of lenses, specifically to a lens structure that accelerates the dissipation of water mist. Background Technology

[0002] With rapid economic development, the automotive industry is playing an increasingly larger role in the national economy, and has gradually transformed from a "luxury item" into a basic necessity for every household. As a crucial component of automobiles, the quality of in-vehicle cameras directly impacts the performance of the vehicle.

[0003] As a means of transportation, the outdoors is the primary operating environment for automobiles, requiring them to function normally even in extreme natural conditions. Therefore, the requirements for automotive lenses are quite stringent. In extreme weather conditions, such as rain, snow, or sudden temperature drops, the outer surface of the first lens element of an automotive lens comes into contact with the air, making the inner surface very prone to fogging. This results in blurred images, which in turn affects the normal use of the vehicle and, in severe cases, can even pose a safety hazard.

[0004] The reason for fogging inside the lens is the temperature difference between the inner and outer cavities. In cold or temperature-fluctuating environments, the outer surface of the first lens element is in contact with the cold air, while the inner surface connects to the internal structure. When the entire lens is working, the module generates heat. The water molecules in the internal air are at a higher temperature. Using the first lens element as the interface, when the hot air from inside comes into contact with the first lens element, due to the temperature difference between the inside and outside, the water molecules in the internal air cool down and condense into water fog on the inner surface of the first lens element.

[0005] Due to the inherent structure of the lens, water vapor formation is inevitable. Currently, the industry's main solution is to incorporate a heating structure into the lens module, ultimately achieving rapid heating of the first lens element to quickly dissipate the existing fog. However, this method increases design, manufacturing, and assembly costs, and results in a complex structure, which does not align with the market's pursuit of low cost and simple design. Utility Model Content

[0006] This application aims to provide a lens structure that accelerates the dissipation of water mist. Compared with existing lenses that add heating structures, this application has a lower cost and a simpler lens structure.

[0007] To achieve the above objectives, this utility model provides a lens structure for accelerating the dissipation of water mist, including a lens barrel with a lens groove. A first lens and a second lens are sequentially arranged at the front end of the lens groove, and a first cavity is formed between the first lens and the second lens. A screen-printed ink layer that abuts against the first lens is screen-printed on the front side of the second lens. The screen-printed ink layer separates the first lens and the second lens, and the screen-printed ink layer has an exhaust gap that connects the first cavity and the interior of the lens.

[0008] Compared with the prior art, the beneficial effects of this application are as follows:

[0009] This application provides a lens structure for accelerating the dissipation of water mist, including a lens barrel with a lens groove, and a first lens and a second lens sequentially disposed at the front end of the lens groove. By pre-screening a screen-printed ink layer on the second lens and leaving an exhaust gap on the screen-printed ink layer, a first cavity formed between the first lens and the second lens can communicate with the inside of the lens. When mist is generated in the first cavity, the air in the first cavity exchanges with the air inside the lens, which accelerates the dissipation of mist and the air circulation. The temperature difference between the two cavities will decrease rapidly, thereby promoting the dissipation of mist. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0011] Figure 1 This is a cross-sectional view of a lens structure for accelerating water mist dissipation in an embodiment of this application;

[0012] Figure 2 This is a schematic diagram of the structure of the first lens in an embodiment of this application;

[0013] Figure 3 This is a schematic diagram of the structure of the second lens in an embodiment of this application;

[0014] Figure 4 This is a schematic diagram of the original structure of the second lens before the silkscreen ink layer is processed in the embodiments of this application;

[0015] Figure 5 This is a schematic diagram of the structure and the screen printing area of ​​the second lens after processing the screen printing ink layer in the embodiments of this application;

[0016] Figure 6 : This is a schematic diagram illustrating the fog dissipation principle in the embodiments of this application. Detailed Implementation

[0017] like Figure 1-6 As shown, a lens structure for accelerating water mist dissipation includes a lens barrel A3 with a lens groove. A first lens L1 and a second lens L2 are sequentially arranged at the front end of the lens groove. A first cavity K1 is formed between the first lens L1 and the second lens L2. A screen-printed ink layer S6 is screen-printed on the front side of the second lens L2, which abuts against the first lens L1. The screen-printed ink layer S6 separates the first lens L1 and the second lens L2, and the screen-printed ink layer S6 has an exhaust gap J1 that connects the first cavity K1 and the inside of the lens.

[0018] One embodiment of this application provides a lens structure for accelerating the dissipation of water mist, including a lens barrel with a lens groove, and a first lens and a second lens sequentially disposed at the front end of the lens groove. By pre-screening a screen-printed ink layer on the second lens and leaving an exhaust gap on the screen-printed ink layer, a first cavity formed between the first lens and the second lens can communicate with the interior of the lens. When mist is generated in the first cavity, the air in the first cavity exchanges with the air inside the lens, thereby accelerating the dissipation of mist and the air circulation. The temperature difference between the two cavities will decrease rapidly, thus promoting the dissipation of mist.

[0019] In a specific embodiment of this application, the bearing surface S7 on the peripheral side of the front side of the second lens L2 is screen-printed with several spaced screen-printed ink layers S6, and the exhaust gap J1 is formed between adjacent screen-printed ink layers S6. In the existing design, the bearing surface S7 of the second lens L2 is not screen-printed and is closely attached to the bearing surface S3 of the first lens L1. The first cavity K1 can be approximated as a closed cavity. When fog is generated, it can only dissipate through slow heat transfer, resulting in a long dissipation time. This application uses a screen-printing process to directly process a raised discontinuous surface on the bearing surface S7 of the second lens L2. In the new structure, the first cavity K1 and the rear cavity K2 are connected, the airflow speed is accelerated, the temperature difference between the two cavities is rapidly reduced, and thus promotes the dissipation of fog.

[0020] In a specific embodiment of this application, the screen-printed ink layer S7 is arc-shaped and distributed along the peripheral direction of the front side of the second lens L2. In a specific embodiment, it is composed of three spaced arc-shaped protrusions. The bearing surface S3 of the second lens L2 and the protrusion structure are not integrated into a single design, but rather screen-printed, which reduces processing difficulty, lowers costs, and simplifies the lens structure.

[0021] In a further preferred embodiment, a second cavity K2 is formed between the second lens L2 and the lens groove. A communication gap J2 exists between the outer diameter surface of the second lens L2 and the inner wall of the lens groove, and this communication gap J2 communicates with the second cavity K2. Since the lens generates heat during operation, the air in the internal cavity K2 becomes hot air. When the hot air in cavity K1 comes into contact with the cold surface S2 of the first lens, it condenses into water mist. This application utilizes a screen-printed exhaust gap J1 on the bearing surface S7 of the second lens L2, allowing air in K1 to exchange with air in K2, thus accelerating the dissipation of the mist.

[0022] In a specific embodiment of this application:

[0023] The first lens L1 is characterized as follows: the first lens L1 is made of glass, and the shape of the first lens L1 is crescent-shaped, that is, the front side surface S1 is convex, the rear side surface S2 is concave, and the bearing surface S3 on the periphery of the rear side surface is a continuous plane; the front side surface S1 of the first lens is exposed.

[0024] The second lens L2 is characterized as follows: the second lens L2 is made of glass, and its shape is crescent-shaped, meaning the front side S4 is concave and the rear side S5 is convex. The bearing surface S7 on the periphery of the front side is a continuous plane. After screen printing, a new axial platform surface (screen printing ink layer S6) is added. This platform surface is a discontinuous plane, meaning that the new axial platform surface has an exhaust gap J1 with a height H1 ≥ 0.01 mm and a width H2 ≥ 3 mm. The area of ​​the exhaust gap J1 accounts for 20% to 50% of the area of ​​the discontinuous plane, and the number of exhaust grooves is at least one.

[0025] Specifically, the front end of the lens groove is provided with a first step and a second step with gradually decreasing outer diameter from front to back. The outer diameter of the first lens L1 is adapted to the first step and placed on it, and the outer diameter of the second lens L2 is adapted to the second step and placed on it. The lens barrel A3 includes inner diameter surfaces of different positions. The first inner diameter surface mates with the outer diameter surface of the first lens L1, the second inner diameter surface mates with the outer diameter surface of the second lens L2, and the inner diameter surfaces of the remaining positions mate with the outer diameter surfaces of the other parts of the lens. The front end face of the lens barrel A3 contacts the sealing ring A1. The compression rate of the sealing ring is between 10% and 40%, which meets the IP6K9K waterproof rating requirements. The lens barrel is provided with an external thread, and the external thread of the lens barrel and the internal thread of the pressure cap A2 mesh with each other. The front circumferential part of the pressure cap A2 cooperates with the front end of the first lens L1 to lock it. There is a gap between the inside of the pressure cap A2 and the outer diameter of the first lens L1. The inner diameter of the pressure cap A2 cooperates with the front end of the lens barrel A3.

[0026] The manufacturing process of the lens structure for accelerating water mist dissipation is as follows: the original state of the second lens L2 (e.g.) Figure 4 The original front axial platform surface S7 of the second lens S2 is a continuous plane. After screen printing, a layer of ink is applied to a specified area of ​​the front platform surface of the second lens. Figure 5 The S6 gray area represents the state after the screen printing process. The new platform surface has a height difference H1 and a blank width H2 compared to the original platform surface.

[0027] The working principle of this application is as follows: Figure 6As shown, when the external temperature drops, the surface temperature of the S1 surface of the first lens L1 decreases after contacting the cold air. Since the lens generates heat during operation, the air inside the cavity becomes hot air. This hot air in cavity K1 condenses into water vapor upon contact with the cold S2 surface of the first lens. Because the support surface of the second lens has ventilation grooves created through a screen printing process, the air in K1 can exchange with the air in K2, accelerating the dissipation of the fog. In the original design, the front support surface S7 of the second lens L2 was not screen-printed and was tightly attached to the first lens L1. The cavity of K1 could be approximated as a sealed cavity, and when fog was generated, it could only dissipate through slow heat transfer, resulting in a long dissipation time. In the new structure, the K1 cavity and the rear cavity are connected, increasing airflow speed and rapidly reducing the temperature difference between the two cavities, thus promoting fog dissipation.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens structure for accelerating the dissipation of water mist, characterized in that: The lens includes a lens barrel with a lens groove. A first lens and a second lens are sequentially arranged at the front end of the lens groove. A first cavity is formed between the first lens and the second lens. A screen-printed ink layer that abuts against the first lens is screen-printed on the front side of the second lens. The screen-printed ink layer separates the first lens and the second lens, and the screen-printed ink layer has an exhaust gap that connects the first cavity and the inside of the lens.

2. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: The bearing surface on the periphery of the front side of the second lens is screen-printed with several spaced screen-printed ink layers, and the exhaust gap is formed between adjacent screen-printed ink layers.

3. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: The area of ​​the exhaust gap accounts for 20% to 50% of the area of ​​the bearing surface on the periphery of the front side of the second lens, and the number of exhaust gaps is at least one.

4. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: The height H1 of the exhaust gap is ≥0.01mm and the width H2 is ≥3mm.

5. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: The screen-printed ink layer is arc-shaped and distributed along the periphery of the front side of the second lens.

6. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: A second cavity is formed between the second lens and the lens groove, and the exhaust gap connects the first cavity and the second cavity.

7. The lens structure for accelerating water mist dissipation according to claim 6, characterized in that: The outer diameter surface of the second lens has a communicating gap with the inner wall of the lens groove, and the communicating gap communicates with the second cavity.

8. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: The first lens is made of glass, with a convex surface on the front side and a concave surface on the rear side, and the bearing surface on the periphery of the rear side is a continuous plane. The second lens is made of glass, with a concave surface on the front side and a convex surface on the rear side. The bearing surface on the periphery of the front side is a continuous plane.

9. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: The front end of the lens groove is provided with a first step and a second step with gradually decreasing outer diameter from front to back. The outer diameter of the first lens is adapted to the first step and placed on it, and the outer diameter of the second lens is adapted to the second step and placed on it. A sealing ring is provided between the bearing surface on the rear side of the first lens and the first step.

10. The lens structure for accelerating water mist dissipation according to claim 1, characterized in that: It also includes a pressure cap that cooperates with the front end of the lens barrel to lock the first lens onto the lens barrel.

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