Vehicle-mounted lens

Abstract

The utility model, which relates to the technical field of the optical lens, discloses a vehicle-mounted lens comprising a lens barrel, a lens assembly and a moisture absorption member. The lens barrel is provided with a light-in end and a light-out end. The lens assembly comprises a light-in lens and a light-out lens, the light-in lens is installed at the light-in end of the lens barrel, the light-out lens is installed at the light-out end of the installation lens barrel, and an installation cavity is defined by the light-in lens, the light-out lens and the inner wall of the lens barrel; at least part of the moisture absorption piece is made of a moisture absorption material, is located in the mounting cavity and is used for absorbing moisture in the mounting cavity; according to the technical scheme provided by the utility model, the humidity in the mounting cavity can be reduced, so that water mist generated in the lens is reduced, the water mist is absorbed when the water mist is generated, the water mist can be quickly dissipated, and the driving safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lenses, and particularly relates to a vehicle-mounted lens. Background Art

[0002] With the development of society and the improvement of people's living standards, the popularity rate of automobiles has increased significantly. Road traffic safety issues have become one of the important factors affecting the public sense of security in China. The number of deaths in road traffic accidents has always accounted for a relatively large proportion of the total number of deaths in various safety accidents. When the external environmental temperature of a vehicle-mounted lens decreases, the water vapor existing inside the vehicle-mounted lens itself will condense into small water droplets (fog) on the lens. Especially, the small water droplets on the inner side of the lens cannot dissipate for a long time, resulting in blurred images and posing a great potential safety hazard.

[0003] The existing structural design of vehicle-mounted lenses on the market is mainly stacked by spacer rings and lenses. The surface lens is pressed down and sealed to achieve the waterproof function. However, due to the certain humidity still existing in the air inside the lens itself, small water droplets (fog) will still condense on the lens when the external environmental temperature decreases. Therefore, how to reduce the generation of water mist inside the lens and make the water mist dissipate quickly when it is generated has become an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a vehicle-mounted lens, aiming to reduce the generation of water mist inside the lens and make the water mist dissipate quickly when it is generated.

[0005] To achieve the above purpose, the vehicle-mounted lens proposed by the utility model includes a lens barrel, a lens assembly, and a moisture-absorbing member; the lens barrel has a light incident end and a light exit end; the lens assembly includes a light incident lens and a light exit lens. The light incident lens is installed at the light incident end of the lens barrel, and the light exit lens is installed at the light exit end of the lens barrel. The light incident lens, the light exit lens, and the inner wall of the lens barrel define an installation cavity; at least part of the moisture-absorbing member is made of a moisture-absorbing material and is located in the installation cavity to absorb the moisture inside the installation cavity.

[0006] In an embodiment, the light incident lens is fastened to the lens barrel through a sealing assembly; the sealing assembly includes a sealing ring and a pressing member; the sealing ring is arranged between the light incident lens and the lens barrel; one end of the pressing member is installed at the outer edge of the light incident end of the lens barrel, and the other end extends towards the inner side of the lens barrel and abuts against the light incident lens, so that the light incident lens and the sealing ring are pressed tightly against the light incident end of the lens barrel.

[0007] In one embodiment, an annular protrusion is convexly provided at a position on the inner wall of the lens barrel near the light-emitting end; the lens assembly further includes a lens group and a plurality of spacer rings; the lens group is located inside the lens barrel, the lens group includes a plurality of lenses that are relatively spaced apart along the axial direction of the lens barrel, the plurality of lenses include a first lens and a second lens that are arranged at intervals, the first lens abuts against the light-incident lens, and the second lens can abut against the annular protrusion under the action of a pressing member; the plurality of spacer rings are located inside the lens barrel and are alternately arranged with the plurality of lenses.

[0008] In one embodiment, notches that penetrate axially along the lens barrel are provided at the edges of the plurality of lenses, so that the spaces on both sides of each lens are communicated.

[0009] In one embodiment, the light-incident lens is a convex-concave lens with its concave surface facing the first lens; in the direction from the center of the lens barrel to the edge, the moisture-absorbing member is located inside the sealing ring and is arranged between the light-incident lens and the light-incident end of the lens barrel, and the moisture-absorbing member is correspondingly arranged with the notch of the first lens.

[0010] In one embodiment, the moisture-absorbing member is arranged in a ring shape.

[0011] In one embodiment, the dimension H of the moisture-absorbing member in the axial direction of the lens barrel satisfies: H≥0.6mm.

[0012] In one embodiment, the interval L between every two adjacent lenses satisfies: 1mm≤L≤5mm.

[0013] In one embodiment, a sealant is provided between the light-emitting lens and the light-emitting end of the lens barrel.

[0014] In one embodiment, at least part of the moisture-absorbing member is made of a resin material with moisture-absorbing properties.

[0015] The technical solution of the present utility model defines an installation cavity through the lens barrel, the light-incident lens and the light-emitting lens, and a moisture-absorbing member is arranged in the installation cavity, and at least part of the moisture-absorbing member is made of a moisture-absorbing material to reduce the humidity in the installation cavity, thereby reducing the generation of water mist inside the lens, and absorbing the water mist when the water mist is generated, enabling the water mist to quickly dissipate and improving driving safety. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0017] Figure 1 Schematic diagram of the principle of fogging of the lens in the prior art;

[0018] Figure 2 The figure is a schematic structural diagram of an embodiment of the vehicle-mounted lens provided by the present utility model.

[0019] Explanation of the reference numerals in the drawings:

[0020] 100. Vehicle-mounted lens; 1. Lens barrel; 11. Light incident end; 12. Light exit end; 13. Annular protrusion; 14. Sealing assembly; 141. Sealing ring; 142. Pressing member; 2. Lens assembly; 21. Light incident lens; 22. Light exit lens; 23. Lens group; 231. First lens; 232. Second lens; 233. Third lens; 234. Spacer ring; 3. Moisture-absorbing member.

[0021] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0025] Such as Figure 1As shown, the arrow direction represents the air flow direction. When encountering cold air, the temperature of the lens of the vehicle-mounted camera drops suddenly, while the inside of the vehicle-mounted camera is at room temperature. The water vapor inside the vehicle-mounted camera condenses to form small water droplets (fog). Moreover, as the vehicle-mounted camera is exposed to cold air for too long, the same situation will occur to the lens inside. Therefore, when the external environmental temperature of the vehicle-mounted camera decreases, the water vapor existing inside the vehicle-mounted camera itself will condense into small water droplets (fog) on the lens. Especially, the small water droplets on the inner side of the lens cannot dissipate for a long time, which will cause the image to be blurred and pose a great potential safety hazard. Currently, the structural design of vehicle-mounted cameras on the market mainly stacks spacers and lenses, presses and seals the surface lens to achieve the waterproof function. However, since there is still a certain humidity in the air existing inside the camera itself, small water droplets (fog) will still condense on the lens when the external environmental temperature decreases. Due to the space limitation of the installation position of the vehicle-mounted camera, installing a heating device or thermal insulation material externally will increase the overall volume of the vehicle-mounted camera, and the solution is difficult to implement. Therefore, how to reduce the generation of water mist inside the camera and make the water mist dissipate quickly when it is generated has become an urgent problem to be solved by those skilled in the art. Based on this, the present utility model proposes a vehicle-mounted camera 100.

[0026] Please refer to Figure 2 , in an embodiment of the present utility model, the vehicle-mounted camera 100 includes a lens barrel 1, a lens assembly 2, and a moisture absorbent 3; the lens barrel 1 has a light incident end 11 and a light exit end 12; the lens assembly 2 includes a light incident lens 21 and a light exit lens 22. The light incident lens 21 is installed at the light incident end 11 of the lens barrel 1, and the light exit lens 22 is installed at the light exit end 12 of the lens barrel 1. The light incident lens 21, the light exit lens 22, and the inner wall of the lens barrel 1 define an installation cavity; at least a part of the moisture absorbent 3 is made of a moisture absorbent material and is located in the installation cavity to absorb the moisture inside the installation cavity.

[0027] The technical solution of the present utility model defines an installation cavity through the lens barrel 1, the light incident lens 21, and the light exit lens 22, and a moisture absorbent 3 is arranged in the installation cavity. At least a part of the moisture absorbent 3 is made of a moisture absorbent material to reduce the humidity in the installation cavity, thereby reducing the generation of water mist inside the camera and absorbing the water mist when it is generated, enabling the water mist to dissipate quickly and improving driving safety.

[0028] Specifically, the moisture absorbent 3 is a resin material with moisture absorption characteristics, such as superabsorbent resin, polyvinyl alcohol, silica gel, etc. Further, the above materials are prepared into a coating to be coated on the inner wall of the lens barrel 1 or prepared into a part with a fixed shape to be installed inside the lens barrel 1.

[0029] In an embodiment of the present utility model, the incident light lens 21 is fastened to the lens barrel 1 through the sealing assembly 14; the sealing assembly 14 includes a sealing ring 141 and a pressing member 142; the sealing ring 141 is arranged between the incident light lens 21 and the lens barrel 1; one end of the pressing member 142 is installed on the outer edge of the incident light end 11 of the lens barrel 1, and the other end extends toward the inner side of the lens barrel 1 and abuts against the incident light lens 21, so that the incident light lens 21 and the sealing ring 141 are pressed tightly against the incident light end 11 of the lens barrel 1. With such a setting, through the cooperation of the sealing ring 141 and the pressing member 142, the incident light lens 21 is fastened to the incident light end 11 of the lens barrel 1 to achieve the function of sealing and waterproofing, preventing a large amount of liquid water or gaseous water from entering the installation cavity.

[0030] Specifically, an external thread is provided on the circumferential direction of the incident light end 11 of the lens barrel 1, an internal thread matching the external thread is provided at one end of the pressing member 142, and the other end is an annular pressing ring. The internal thread is adapted to the external thread, so that the annular pressing ring presses the incident light lens 21 tightly.

[0031] In an embodiment of the present utility model, an annular protrusion 13 is convexly provided on the inner wall of the lens barrel 1 near the light-emitting end 12; the lens assembly 2 further includes a lens group 23 and a plurality of spacer rings 234; the lens group 23 is located inside the lens barrel 1, and the lens group 23 includes a plurality of lenses arranged at intervals in the axial direction of the lens barrel 1. The plurality of lenses include a first lens 231 and a second lens 232 arranged at intervals. The first lens 231 abuts against the incident light lens 21, and the second lens 232 can abut against the annular protrusion 13 under the action of the pressing member 142; the plurality of spacer rings 234 are located inside the lens barrel 1 and are alternately arranged with the plurality of lenses. With such a setting, the lens group 23 is pressed tightly between the annular protrusion 13 and the incident light lens 21.

[0032] In addition, the moisture-absorbing member 3 can be set as a sleeve-like structure and sleeved on the first lens 231 or a plurality of lenses in the circumferential direction. With such a setting, a good moisture-absorbing effect can be achieved.

[0033] Specifically, the lens assembly 2 further includes a third lens 233, and the third lens 233 is arranged between the first lens 231 and the second lens 232. Spacer rings 234 are arranged between the third lens 233 and the first lens 231 and the second lens 232 respectively.

[0034] In addition, an anti-fog layer is provided on the surfaces of the first lens 231, the second lens 232, and the third lens 233. An anti-fog spray containing a hygroscopic component is sprayed on the surfaces of the first lens 231, the second lens 232, and the third lens 233 to form an anti-fog layer.

[0035] In an embodiment of the present utility model, notches penetrating axially along the lens barrel 1 are provided at the edges of multiple lenses, so that the spaces on both sides of each lens are connected. Such a setting enables the smooth connection of the internal space of the installation cavity, further enabling the moisture absorption member 3 to absorb the moisture in the entire installation cavity, and the humidity in the space around each lens is evenly distributed, preventing excessive humidity in a certain space from causing fog on the surface of the adjacent lens. At the same time, the temperature in the installation cavity can be evenly distributed, enabling the fog to dissipate quickly.

[0036] When the temperature of the external environment decreases, the temperature difference between the installation cavity near the incident light lens 21 and the external environment is the largest, and water mist is most likely to be generated. In an embodiment of the present utility model, the incident light lens 21 is a convex-concave lens, and its concave surface faces the first lens 231; along the direction from the center of the lens barrel 1 to the edge, the moisture absorption member 3 is located inside the sealing ring 141 and is arranged between the incident light lens 21 and the incident end 11 of the lens barrel 1, and the moisture absorption member 3 is correspondingly arranged with the notch of the first lens 231. With such a setting, a cavity is formed between the incident light lens 21 and the first lens 231, and the cavity is connected to the space where the moisture absorption member 3 is located through the notch of the first lens 231, enabling the moisture absorption member 3 to reduce the humidity in the cavity and remove the water mist in the cavity, that is, remove the water mist on the side of the incident light lens 21 close to the first lens 231 and remove the water mist on the side of the first lens 231 close to the incident light lens 21.

[0037] In an embodiment of the present utility model, the moisture absorption member 3 is arranged in a ring shape. With such a setting, the moisture absorption member 3 can have a larger volume in the narrow space inside the lens, improving the space utilization rate and the defogging effect.

[0038] In an embodiment of the present utility model, the dimension H of the moisture absorption member 3 in the axial direction of the lens barrel 1 satisfies: H≥0.6mm. With such a setting, the moisture absorption member 3 can be successfully formed, so as to have a certain surface area to absorb moisture.

[0039] In an embodiment of the present utility model, the interval L between every two adjacent lenses satisfies: 1mm≤L≤5mm. With such a setting, sufficient gaps are left between the multiple lenses to enable the uniform flow of the gas in the installation cavity, and the volume requirements of the vehicle-mounted lens 100 are met.

[0040] In an embodiment of the present utility model, a sealant is provided between the outgoing light lens 22 and the outgoing end 12 of the lens barrel 1. With such a setting, the entry of gaseous water or liquid water into the installation cavity is reduced, and the internal moisture in the installation cavity is increased.

[0041] In an embodiment of the present utility model, at least part of the moisture absorption member 3 is made of a resin material with moisture absorption characteristics. Specifically, the moisture absorption member 3 has an installation part and a moisture absorption part. The moisture absorption part has as large a surface area as possible to absorb the moisture in the installation cavity, and the installation part is matched with the incident end 11 of the lens barrel 1 to fix the moisture absorption member 3.

[0042] Now, verify the defogging effect of the vehicle-mounted lens 100:

[0043] (1) In the experimental group, take 10 vehicle-mounted lenses 100 provided by the present utility model, put them into an 85°C and 85% RH high-temperature and high-humidity chamber for 1 hour, quickly take them out and soak them in 0°C ice water for 3 seconds, take them out and record the fog dissipation time. The results are shown in Table 1 below;

[0044] (2) In the control group, take 10 ordinary lenses, put them into an 85°C and 85% RH high-temperature and high-humidity chamber for 1 hour, quickly take them out and soak them in 0°C ice water for 3 seconds, take them out and record the fog dissipation time. The results are shown in Table 1 below:

[0045]

[0046]

[0047] Comparing the two groups of experiments, the average dissipation time of the experimental group is 15 seconds, and the average dissipation time of the control group is 46 seconds. The fog dissipation time is reduced by two-thirds. The vehicle-mounted lens 100 provided by the present utility model has a good defogging effect.

[0048] It can be seen from this that the technical solution of the present utility model can reduce the humidity in the installation cavity, thereby reducing the generation of water mist inside the lens, and absorbing the water mist when the water mist is generated, enabling the water mist to dissipate quickly and improving driving safety.

[0049] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A vehicle-mounted lens, characterized in that: include: A lens barrel having a light input end and a light output end; The lens assembly comprises a light input lens and a light output lens, wherein the light input lens is mounted at the light input end of the lens barrel, and the light output lens is mounted at the light output end of the mounting lens barrel, wherein the light input lens, the light output lens and the inner wall of the lens barrel define a mounting cavity; as well as, The hygroscopic component is at least partially configured as a hygroscopic material and is located in the installation cavity to absorb moisture inside the installation cavity.

2. The vehicle-mounted lens according to claim 1, characterized in that: The light-incoming lens is buckled onto the lens barrel via a sealing assembly; The sealing assembly comprises: A sealing ring is disposed between the light-incoming lens and the lens barrel; and A pressing member has one end mounted on the outer edge of the light incident end of the lens barrel, and the other end extending toward the inner side of the lens barrel and abutting against the light incident lens, so that the light incident lens and the sealing ring are pressed tightly to the light incident end of the lens barrel.

3. The vehicle-mounted lens according to claim 2, characterized in that: The inner wall of the lens barrel is provided with an annular protrusion at a position close to the light-emitting end; The lens assembly also includes: a lens group, located in the lens barrel, the lens group comprising a plurality of lenses arranged relatively spaced apart along the axial direction of the lens barrel, the plurality of lenses comprising a first lens and a second lens arranged spaced apart, the first lens abutting against the light incident lens, and the second lens being able to abut against the annular protrusion under the action of the holding member; and A plurality of spacers are located in the lens barrel and are arranged alternately with the plurality of lenses.

4. The vehicle-mounted lens according to claim 3, characterized in that: The edges of the multiple lenses are each provided with a notch penetrating along the axial direction of the lens barrel, so that the spaces on both sides of each lens are connected.

5. The vehicle-mounted lens according to claim 4, characterized in that: The incident light lens is a convex-concave lens, with its concave surface facing the first lens; Along the direction from the center to the edge of the lens barrel, the moisture absorbent is located on the inner side of the sealing ring and is arranged between the light incident lens and the light incident end of the lens barrel. The moisture absorbent is arranged corresponding to the notch of the first lens.

6. The vehicle-mounted lens according to claim 1 or 5, characterized in that: The moisture absorbent member is arranged in a ring shape.

7. The vehicle-mounted lens according to claim 5, characterized in that: A dimension H of the moisture absorbing member along the axial direction of the lens barrel satisfies: H≥0.6 mm.

8. The vehicle-mounted lens according to claim 3, characterized in that: The interval L between any two adjacent lenses satisfies: 1 mm ≤ L ≤ 5 mm.

9. The vehicle-mounted lens according to claim 1, wherein: A sealant is arranged between the light-emitting lens and the light-emitting end of the lens barrel.

10. The vehicle-mounted lens according to claim 1, wherein: The absorbent member is at least partially provided with a resin material having hygroscopic properties.

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