Internal heating type demisting lens

Abstract

The utility model discloses an internal heating type demisting lens, which comprises a lens cone, an end cover, a base, a lens group and a heating assembly, the end cover and the base are respectively connected to two sides of the lens cone; the lens group is arranged in the lens cone; a mounting groove is formed in the middle in the lens barrel, and a plurality of mounting holes are formed in the mounting groove in the circumferential direction of the lens barrel; a heating groove is formed in one side, close to the end cover, of the lens barrel; the first heating piece comprises a mounting ring and a heating rod; the second heating piece comprises a heating body and dispersing fins; the heating rods are uniformly arranged on one side of the mounting ring at intervals in the circumferential direction, the heating rods are used for being inserted into the mounting holes, and the mounting ring is used for being inserted into the mounting groove; the dispersing fins are evenly arranged in the heating body at intervals in the circumferential direction, and the heating body and the dispersing fins are arranged in the heating groove. Through respective heating of the first heating member and the second heating member, water mist can be effectively prevented from being generated on lenses inside and outside the lens cone, and the lenses are kept clear.

Description

Technical Field

[0001] The utility model belongs to the technical field of lenses, and specifically relates to an internally heated anti-fog lens. Background Technique

[0002] An optical lens is an optical element used to adjust the propagation direction and shape of light. It is usually made of a transparent material (such as glass or plastic) and can refract, transmit, and reflect light. Optical lenses are widely used in various optical systems, such as cameras, microscopes, telescopes, lasers, glasses, etc., for purposes such as focusing, magnifying, and changing the optical path. Optical lenses are usually divided into different types such as convex lenses (convex lenses), concave lenses (concave lenses), and prisms. The structures and properties of different types of lenses are different, and their uses are also different. By reasonably designing and combining optical lenses, precise control of light can be achieved, thereby achieving the desired optical effects.

[0003] The appearance of water mist on the lens surface is mainly due to the condensation of water vapor in the air caused by temperature differences on the lens surface. Specifically, when the lens temperature is lower than the dew point temperature of the surrounding air, the water vapor in the air will condense into water droplets or a water film on the lens surface, forming water mist. For example, when an outdoor camera in winter enters a room, the lens is heated, causing the surface temperature to be lower than the indoor temperature, and it is easy to generate water mist. In the prior art, a cotton cloth is usually used to wipe the water mist on the lens surface. However, after wiping the lens clean with a cotton cloth, the lens is still prone to water mist. Especially when the sealing of some lenses is not good, water vapor enters the lens and water mist will be generated inside the lens, and the water mist inside the lens cannot be wiped.

[0004] In the patent with the publication number CN213818009U, a monitoring device convenient for removing water mist is disclosed. The front side and the rear side of the top of the installation shell of this monitoring device are both provided with first electric telescopic rods penetrating through, and a wiping plate is fixedly connected to the bottom of the first electric telescopic rod. The monitoring device with this structure removes water mist by the electric telescopic rod and the wiping plate when wiping the lens. This method has the problem of poor water mist removal effect. At the same time, in the case of long-term use, the wiping plate is likely to wipe off the coating on the lens surface, resulting in the problem of unclear vision of the lens. Content of the Utility Model

[0005] The purpose of the utility model is to provide an internally heated anti-fog lens to solve the following technical problems raised in the background technique:

[0006] In the prior art, water mist on the lens surface is usually wiped to remove fog. However, the method of wiping the lens has a poor defogging effect and cannot remove the water mist generated inside the lens.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is:

[0008] An internally heated demisting lens, comprising a lens barrel, an end cap, a base, a lens group and a heating assembly; the end cap and the base are respectively connected to both sides of the lens barrel; the lens group is arranged inside the lens barrel;

[0009] An installation groove is arranged in the middle of the lens barrel, and a plurality of installation holes are arranged along the circumferential direction of the lens barrel; a heating groove is arranged on one side of the lens barrel close to the end cap; the heating assembly includes a first heating element and a second heating element; the first heating element includes an installation ring and a heating rod; the second heating element includes a heating body and dispersion fins;

[0010] The heating rods are arranged at equal intervals along the circumferential direction on one side of the installation ring, the heating rods are used for inserting into the installation holes, and the installation ring is used for inserting into the installation groove; the dispersion fins are arranged at equal intervals along the circumferential direction inside the heating body, and the heating body and the dispersion fins are arranged in the heating groove.

[0011] Further, the end cap is threadedly connected to the lens barrel, and the inner side of the end cap contacts and presses the lens group. The end cap is threadedly connected to the lens barrel, and the inner side of the end cap contacts and presses the lens group.

[0012] Further, the lens group includes an outer lens, an intermediate lens, a spacer ring and an inner lens group; wherein, the outer lens is arranged on one side of the lens barrel close to the end cap, the outer lens is also connected to the end cap, the intermediate lens is arranged inside the lens barrel and close to the outer lens, the inner lens group is arranged on one side of the lens barrel far from the outer lens, and the spacer ring is arranged between the intermediate lens and the inner lens group; the spacer ring is fixedly connected to the lens barrel, and one side of the spacer ring is connected to the intermediate lens and the other side is connected to the inner lens group.

[0013] Further, a first sealing groove is arranged on one side of the lens barrel close to the end cap, a first sealing ring is arranged in the first sealing groove, the outer lens is pressed on the first sealing ring through the end cap, and one side of the intermediate lens is located between the first sealing rings.

[0014] Further, a second sealing groove is arranged on one side of the lens barrel close to the end cap, a second sealing ring is arranged in the second sealing groove; the intermediate lens is located between the second sealing rings.

[0015] Further, a third sealing groove is arranged on one side of the spacer ring facing the intermediate sealing ring, a third sealing ring is arranged in the third sealing groove; one end outside of the intermediate lens abuts against the spacer ring and contacts the third sealing ring.

[0016] Further, a layer of hydrophobic film is arranged on the outer side of the outer lens.

[0017] Further, the base is threadedly connected to the lens barrel.

[0018] Further, the lens group further includes a filter, and the filter is fixedly connected to one side of the lens barrel close to the base.

[0019] Further, the dispersing fins are annular fins, and a plurality of dispersing fins are arranged in the heating body, and the dispersing fins are evenly spaced in the axial direction in the heating body.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] By separately heating the first heating element and the second heating element, the utility model can effectively prevent water mist from generating on the inner and outer lenses of the lens barrel, and keep the lenses clear. The design of the heating rod and the dispersing fins ensures that the heat can be evenly conducted during the heating process, improves the heating efficiency, and thus realizes a stable and rapid defogging effect. The design of the installation groove and the installation hole makes the installation firm and reliable, ensures the fixed positions of the components, and reduces the risk of loosening caused by vibration or other factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 is a schematic diagram of the internal structure of the utility model;

[0024] Figure 3 is a schematic diagram of the structure of the first heating element of the utility model;

[0025] Figure 4 is a schematic diagram of the structure of the second heating element of the utility model.

[0026] Reference numerals in the drawings: 1 - base, 2 - lens barrel, 3 - end cap, 4 - second heating element, 5 - heating groove, 6 - installation groove, 7 - installation hole, 8 - first heating element, 9 - filter, 10 - inner lens group, 11 - spacer, 12 - intermediate lens, 13 - outer lens, 14 - first sealing groove, 15 - first sealing ring, 16 - second sealing groove, 17 - second sealing ring, 18 - third sealing groove, 19 - third sealing ring, 20 - mounting ring, 21 - heating rod, 22 - heating body, 23 - dispersing fin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present utility model will be clearly and completely described below 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 of 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.

[0028] Embodiment

[0029] An internally heated defogging lens, as Figure 1As shown in the figure, it includes a lens barrel 2, an end cap 3, a base 1, a lens group, and a heating component; the end cap 3 and the base 1 are respectively connected to both sides of the lens barrel 2, and the end cap 3 and the base 1 are used to stabilize the entire device and protect the internal components. The lens group is arranged inside the lens barrel 2, and the lens group is used to achieve optical imaging.

[0030] As Figure 2 shown in the figure, an installation groove 6 is provided in the middle of the lens barrel 2, and a number of installation holes 7 are provided along the circumferential direction of the lens barrel 2; a heating groove 5 is provided on one side of the lens barrel 2 close to the end cap 3; the heating component includes a first heating element 8 and a second heating element 4; the first heating element 8 includes an installation ring 20 and a heating rod 21; the second heating element 4 includes a heating body 22 and a dispersion fin 23. Among them, a resistance wire is provided inside the heating rod 21, and a resistance wire is provided inside the heating body 22; an external power supply, such as a battery, is provided outside the lens, and the battery supplies power to the installation ring 20, and the installation ring 20 supplies power to the resistance wire inside the heating rod 21 so that the heating rod 21 generates heat. The battery supplies power to the resistance wire inside the heating body 22 so that the heating body 22 generates heat, and the dispersion fins 23 inside the heating body 22 are used to concentrate heat.

[0031] As Figure 3 shown in the figure, the heating rods 21 are arranged at equal intervals along the circumferential direction on one side of the installation ring 20, and the heating rods 21 are used to be inserted into the installation holes 7, and the installation ring 20 is used to be inserted into the installation groove 6; uniform heating is achieved through a plurality of heating rods 21. As Figure 4 shown in the figure, the dispersion fins 23 are arranged at equal intervals along the circumferential direction inside the heating body 22, and the heating body 22 and the dispersion fins 23 are arranged in the heating groove 5.

[0032] The first heating element 8 is used to heat the middle position of the lens barrel 2, and the second heating element 4 is used to heat the end position of the lens barrel 2. Heating the middle of the lens barrel 2 is mainly to prevent water mist from generating inside the lens. Heating the end of the lens barrel 2 is mainly to prevent water mist from appearing on the end face of the lens in contact with the outside world. At the same time, it is also used to remove the water mist on the end face of the lens in contact with the outside world. More specifically, the mounting ring 20 is electrically connected to an external power source, for example, connected to a battery. At the same time, the mounting ring 20 is also electrically connected to each heating rod 21. On the one hand, the mounting ring 20 is used to fix the positions of the heating rods 21, and on the other hand, it can supply power to each heating rod 21 so that the heating rods 21 generate heat. The heating body 22 is of a cylindrical structure. The heating body 22 is used to be electrically connected to an external power source and generate heat, for example, connected to a battery. The dispersing fins 23 are used to conduct heat and converge the heat inside the heating body 22, so as to facilitate the transfer of heat to the lens barrel 2, and then to the lens to achieve defogging. It should also be noted that the heating temperature of the first heating element 8 is between 30 - 40 °C, and the heating temperature of the second heating element 4 is between 35 - 50 °C. The reason for such a design is that the main function of the first heating element 8 is to generate water mist on the side of the lens inside the lens barrel 2, and the connection relationship between the lens barrel 2 and the lens is relatively sealed. Therefore, there is less water vapor inside the lens barrel 2, and it is not easy to generate water mist inside the lens barrel 2. Therefore, the main function of the first heating element 8 is to prevent water mist from generating, so a too high temperature is not required. The object of the second heating element 4 is the outer lens of the lens group. This lens is directly in contact with the outside world. When the external temperature difference is large or the humidity is high, it is very easy to generate water mist on this lens. The generation of water mist on this lens is inevitable. Therefore, a higher temperature is required to defog this lens. At the same time, a higher temperature can prevent water mist from continuously generating on the lens.

[0033] In a preferred embodiment, as Figure 2 shown, the end cap 3 is threadedly connected to the lens barrel 2, and the inner side of the end cap 3 contacts and presses the lens group. The end cap 3 is threadedly connected to the lens barrel 2, and the inner side of the end cap 3 contacts and presses the lens group. Through this design, it can be ensured that the lens group is firmly fixed inside the end cap 3 and maintained in a proper position. At the same time, pressing the lens group by the end cap 3 can improve the sealing performance between the lens group and the lens barrel 2, preventing water vapor from entering the lens barrel 2 through the gap between the lens group and the lens barrel 2.

[0034] In a preferred embodiment, as Figure 2As shown in the figure, the lens group includes an outer lens 13, an intermediate lens 12, a spacer 11, and an inner lens group 10. Among them, the outer lens 13 is arranged on one side of the lens barrel 2 close to the end cap 3, and the outer lens 13 is also connected to the end cap 3. The intermediate lens 12 is arranged in the lens barrel 2 and close to the outer lens 13. The inner lens group 10 is arranged on one side of the lens barrel 2 far from the outer lens 13. The spacer 11 is arranged between the intermediate lens 12 and the inner lens group 10. The spacer 11 is fixedly connected to the lens barrel 2, and one side of the spacer 11 is connected to the intermediate lens 12, and the other side is connected to the inner lens group 10. Through this design, each lens in the lens group can be stably installed in the lens barrel 2 and each lens can be kept in the correct position, which is beneficial to optical imaging.

[0035] In a preferred embodiment, as Figure 2 shown, a first sealing groove 14 is arranged on one side of the lens barrel 2 close to the end cap 3. A first sealing ring 15 is arranged in the first sealing groove 14. The outer lens 13 is pressed on the first sealing ring 15 through the end cap 3. One side of the intermediate lens 12 is located between the first sealing rings 15. Specifically, the first sealing groove 14 is a stepped groove. The first sealing ring 15 is arranged in the first sealing groove 14. The bottom of the outer lens 13 is pressed on the sealing ring, and the side of the intermediate lens 12 also presses against the first sealing ring 15. Therefore, the first sealing ring 15 can simultaneously seal the outer lens 13 and the intermediate lens 12. Thus, it can effectively prevent water vapor from entering the lens barrel 2 through the gap between the lens barrel 2 and the outer lens 13, and fundamentally prevent the generation of water mist in the lens barrel 2. The first sealing ring 15 can also prevent dust and impurities from entering the lens barrel 2.

[0036] In a preferred embodiment, as Figure 2 shown, a second sealing groove 16 is arranged on one side of the lens barrel 2 close to the end cap 3. A second sealing ring 17 is arranged in the second sealing groove 16. The intermediate lens 12 is located between the second sealing rings 17. The design of the second sealing groove 16 is to facilitate the setting of the second sealing ring 17. The second sealing ring 17 is arranged in the second sealing groove 16, and the intermediate lens 12 is arranged between the second sealing rings 17 and presses the second sealing ring 17 tightly.

[0037] In a preferred embodiment, as Figure 2 shown, a third sealing groove 18 is arranged on the side of the spacer 11 facing the intermediate sealing ring. A third sealing ring 19 is arranged in the third sealing groove 18. One end outside of the intermediate lens 12 abuts against the spacer 11 and contacts the third sealing ring 19. Specifically, the design of the third sealing groove 18 is to facilitate the setting of the third sealing ring 19. During use, the intermediate lens 12 is pressed on the third sealing ring 19, and the third sealing ring 19 can further improve the sealing performance between the intermediate lens 12 and the lens barrel 2. It can effectively prevent external water vapor, dust and other impurities from entering the lens barrel 2.

[0038] In a preferred embodiment, a layer of hydrophobic film is provided on the outer side of the outer lens 13. This hydrophobic film can effectively reduce the retention of water droplets on the lens surface, prevent water droplets from interfering with the field of view, and also help prevent dust and other contaminants from adhering to the lens, keeping the lens clean. The hydrophobic film can also improve the wear resistance and anti-fouling performance of the lens, extend the service life of the lens, and enhance the user experience. By applying the hydrophobic film on the outer lens 13, the performance of the optical device can be effectively improved and a clearer and more durable visual effect can be provided. Specifically, the hydrophobic film here can be made of polytetrafluoroethylene.

[0039] In a preferred embodiment, as Figure 2 shown, the base 1 is threadedly connected to the lens barrel 2. The threaded connection between the base 1 and the lens barrel 2 can ensure the stability and sealing performance between the base 1 and the lens barrel 2. Through the threaded connection, a reliable fixation is formed between the base 1 and the lens barrel 2, preventing loosening or detachment during use, thereby ensuring the stability of the internal lens. In addition, the threaded connection also facilitates the assembly and disassembly by the user, improving the usability and maintenance efficiency of the device. The threaded connection method helps to ensure the stability and safety of the device during use and can be applicable to various application scenarios.

[0040] In a preferred embodiment, as Figure 2 shown, the lens group further includes a filter 9, and the filter 9 is fixedly connected to one side of the lens barrel 2 close to the base 1. This design can effectively and securely fix the filter 9 inside the lens barrel 2, reduce the risk of movement or detachment of the filter 9, and ensure its stability and reliability during use. Fixing the filter 9 inside the lens barrel 2 can also reduce the gap between the lens components, improving the accuracy and performance of the optical system.

[0041] In a preferred embodiment, as Figure 4 shown, the dispersion fins 23 are annular fins, and a plurality of dispersion fins 23 are arranged inside the heating element 22. The dispersion fins 23 are evenly spaced in the axial direction inside the heating element 22. The design of the annular fins can effectively increase the surface area of the heating element 22, improve the heat conduction efficiency, and make the heating speed of the heating element 22 faster and more uniform. At the same time, the uniform spacing arrangement of the annular fins can ensure the uniform distribution of heat inside the heating element 22, thereby improving the overall stability and working efficiency of the heating element 22. Such a design can not only improve the performance and service life of the heating element 22, but also better meet the requirements of stable heating of the lens.

[0042] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0043] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "set", "connected", "fixed", "swiveling connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An internally heated defog lens, characterized in that: It comprises a lens barrel (2), an end cover (3), a base (1), a lens group and a heating component; the end cover (3) and the base (1) are respectively connected to two sides of the lens barrel (2); and the lens group is arranged in the lens barrel (2); A mounting groove (6) is provided in the middle of the lens barrel (2), and a plurality of mounting holes (7) are provided in the mounting groove (6) along the circumferential direction of the lens barrel (2); a heating groove (5) is provided on one side of the lens barrel (2) close to the end cover (3); the heating assembly comprises a first heating element (8) and a second heating element (4); the first heating element (8) comprises a mounting ring (20) and a heating rod (21); the second heating element (4) comprises a heating body (22) and a dispersion fin (23); The heating rods (21) are evenly spaced along the circumferential direction on one side of the mounting ring (20); the heating rods (21) are used to be inserted into the mounting hole (7); and the mounting ring (20) is used to be inserted into the mounting groove (6); the dispersion fins (23) are evenly spaced along the circumferential direction inside the heating body (22); and the heating body (22) and the dispersion fins (23) are arranged in the heating groove (5).

2. The internally heated defog lens according to claim 1, characterized in that: The end cap (3) is threadedly connected to the lens barrel (2), and the inner side of the end cap (3) contacts and presses the lens group; the end cap (3) is threadedly connected to the lens barrel (2), and the inner side of the end cap (3) contacts and presses the lens group.

3. The internally heated defog lens according to claim 1, characterized in that: The lens group comprises an outer lens (13), an intermediate lens (12), a spacer (11) and an inner lens group (10); wherein the outer lens (13) is arranged on a side of a lens barrel (2) close to an end cover (3), and the outer lens (13) is also connected to the end cover (3); the intermediate lens (12) is arranged in the lens barrel (2) and close to the outer lens (13); the inner lens group (10) is arranged on a side of the lens barrel (2) away from the outer lens (13); the spacer (11) is arranged between the intermediate lens (12) and the inner lens group (10); the spacer (11) is fixed to the lens barrel (2), and one side of the spacer (11) is connected to the intermediate lens (12), and the other side is connected to the inner lens group (10).

4. The internally heated defog lens according to claim 3, characterized in that: A first sealing groove (14) is provided on one side of the lens barrel (2) close to the end cover (3), a first sealing ring (15) is provided in the first sealing groove (14), the outer lens (13) is pressed on the first sealing ring (15) through the end cover (3), and one side of the middle lens (12) is located between the first sealing rings (15).

5. The internally heated defogger lens according to claim 3, characterized in that: A second sealing groove (16) is provided on one side of the lens barrel (2) close to the end cover (3), and a second sealing ring (17) is provided in the second sealing groove (16); the middle lens (12) is located between the second sealing rings (17).

6. The internally heated defog lens according to claim 3, characterized in that: A third sealing groove (18) is arranged on one side of the spacer (11) facing the middle sealing ring, and a third sealing ring (19) is arranged in the third sealing groove (18); the outer side of one end of the middle lens (12) abuts against the spacer (11) and contacts the third sealing ring (19).

7. The internally heated defogger lens according to claim 3, characterized in that: A hydrophobic film is arranged on the outer side of the outer lens (13).

8. The internally heated defog lens according to claim 1, characterized in that: The base (1) is threadedly connected to the lens barrel (2).

9. The internally heated defog lens according to claim 1, characterized in that: The lens group also includes a filter (9), which is fixedly connected to a side of the lens barrel (2) close to the base (1).

10. The internally heated defog lens according to claim 1, characterized in that: The dispersion fins (23) are annular fins. A plurality of dispersion fins (23) are arranged in the heating body (22). The dispersion fins (23) are evenly spaced in the axial direction in the heating body (22).

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