CN113905472B

CN113905472B - Lens with heating device and lens comprising lens

Info

Publication number: CN113905472B
Application number: CN202010646602.XA
Authority: CN
Inventors: 黄虎钧; 叶雷洪; 毛腾
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2024-04-12
Anticipated expiration: 2040-07-07
Also published as: CN113905472A

Abstract

The application provides a heating device, a lens with the heating device, a lens comprising the lens and a method for preparing the lens comprising the heating device. Wherein, above-mentioned lens includes lens body and heating device. The lens body has opposite first and second faces and edges connecting the first and second faces; the heating device is arranged at the edge of the lens body and is used for transferring heat to the lens body after power is supplied, wherein the heating device is configured as a ceramic heating ring or polyimide PI heating film with heating elements arranged inside. The lens with the heating device and the lens comprising the lens can effectively improve the weather resistance of the camera module.

Description

Lens with heating device and lens comprising lens

Technical Field

The present application relates to the technical field of optical devices, and more particularly, to a heating device for a lens, a lens having the heating device, a lens including the lens, and a method of manufacturing a lens including the heating device.

Background

With the development of science and technology, optical devices such as vehicle-mounted lenses, optical lamp covers, and the like are increasingly used in daily life of people. For example, in order to provide comfort and safety for driving an automobile, in-vehicle lenses are widely used in the fields of front view, rear view, around view, inner view, side view, and the like of automobiles. Meanwhile, with the continuous development of automobile technology, the number and performance of the required vehicle-mounted lenses on the automobile are greatly improved, and the requirement on weather resistance of the vehicle-mounted lenses is more severe. When the vehicle runs in a continuous overcast and rainy, frost or alternate cold and hot environment, the inner and outer surfaces of the near-object side lens of the vehicle-mounted lens are extremely easy to generate phenomena of fog or frosting, the optical performance of the vehicle-mounted lens is seriously influenced, and the running safety of people is endangered.

In order to ensure driving safety, the current common means mainly adopts a mode of arranging a heating element in a vehicle-mounted lens to heat moisture attached to the surface of an evaporating lens or prevent fog or frosting and the like. For example, the electric heating wire is directly used for heating the lens product, so that the defogging and defrosting functions are achieved.

However, because the electric heating wire needs to be buried in the lens to be fixed, the original structure of the corresponding lens is changed, the whole manufacturing process difficulty of the lens is increased, the cost is increased, the strength of the corresponding lens is destroyed, the lens is easily broken particularly after temperature rise, the imaging quality is deteriorated, and the lens cannot be maintained. And the electric heating wire can also have the problems of low heating efficiency, poor heating uniformity, complex installation and the like. And the structure that the heating material is embedded into the lens is directly adopted, so that the problems of weaker overall stability of the lens, poorer weather resistance in severe weather and the like can occur. Therefore, the defogging product for the lens, which has the advantages of simple structure, high heat efficiency, uniform heating, safe use and strong weather resistance, is developed.

Disclosure of Invention

The present application provides a lens with heating means that at least solves or partially solves at least one of the above-mentioned at least one disadvantage of the prior art.

In one aspect, the present application provides a lens with a heating device, comprising a lens body having opposing first and second faces, and an edge connecting the first and second faces, and the lens further comprising: and the heating device is arranged at the edge of the lens body and is used for transmitting heat to the lens body after power is supplied, wherein the heating device is configured as a ceramic heating ring or polyimide PI heating film with heating elements arranged inside.

According to an embodiment of the application, the heating device is arranged on the end face and/or the side face of the lens body at the edge.

According to an embodiment of the application, the heating device has a ring-like structure, the contour of which matches the contour of the edge.

According to an embodiment of the application, the edge is provided with a notch groove, and the heating device is arranged in the notch groove.

According to an embodiment of the application, the heating device further comprises a fixing element for fixing the heating device to the rim.

According to an embodiment of the application, the fixing element is an elastic element, which is arranged in a compressed state at the edge.

According to an embodiment of the application, the fixing element is a conductive glue or a conductive tape.

According to an embodiment of the application, the fixing element is a heat-conducting glue or a heat-conducting tape.

According to an embodiment of the present application, there is an organic member between each of the lenses, the ceramic heating ring being formed as the mechanical member.

According to the embodiment of the application, the heating element is arranged between the double-layer polyimide films, and the heating element is connected with each polyimide film through at least one of heat conduction glue, heat conduction adhesive tape, electric conduction glue and electric conduction adhesive tape.

According to an embodiment of the present application, the polyimide heating film is a rigid carrier polyimide heating film.

According to an embodiment of the application, the heating element is an electric heating wire.

According to an embodiment of the application, the heating device further comprises a conductive unit and an energy supply unit, wherein the conductive unit comprises at least two leads for electrically connecting the heating element and the energy supply unit.

According to the embodiment of the application, the electric conduction unit is connected with the heating element through one or more of welding, electric conduction glue, electric conduction adhesive tape, heat conduction glue, heat conduction adhesive tape and compression connection.

Another aspect of the present application provides a lens including a lens having a heating device, comprising: a lens barrel having a side wall; and a plurality of lenses fixed through the side wall of the lens barrel, wherein at least one of the plurality of lenses is the lens with the heating device according to the above.

According to an embodiment of the present application, the heating device is disposed between an end surface of the lens body and a sealing member of the lens.

According to an embodiment of the present application, the heating device is disposed between an edge of the lens body and a side wall of the lens.

According to an embodiment of the application, the heating device is arranged between the edge of the lens body and the edge of the adjacent lens.

According to an embodiment of the application, the heating device is arranged between the edge of the lens body and the sealing element of the lens and the edge of the adjacent lens.

Another aspect of the present application provides a heating device for a lens, the lens comprising a lens body having opposing first and second faces, and an edge connecting the first and second faces, wherein the heating device is disposed in the edge of the lens body and comprises: a ceramic heating ring or polyimide heating film provided with a heating element.

According to an embodiment of the present application, the heating device further comprises a fixing element for fixing the heating device to the edge of the lens body. According to an embodiment of the application, the fixing element is a heat-conducting glue or a heat-conducting tape.

According to an embodiment of the application, the fixing element is an elastic member, and the ceramic heating ring or polyimide heating film is fixed to the rim by an elastic force of the elastic member.

According to the embodiment of the application, the heating element is arranged between the polyimide films in a double layer, and the heating element is connected with each polyimide film through at least one of heat conduction glue, heat conduction adhesive tape, electric conduction glue and electric conduction adhesive tape.

According to embodiments of the present application, the ceramic heating ring or the polyimide heating film has a ring-like structure.

Another aspect of the present application provides a method for preparing a lens including a lens having a heating device, the method comprising: preparing the heating device; disposing the heating device on the lens to form the lens with the heating device; and arranging a plurality of lenses included in the lens barrel.

According to an embodiment of the present application, the lens comprises a lens body having opposing first and second faces, and an edge connecting the first and second faces; disposing the heating device on the lens to form the lens with the heating device includes: the heating device is arranged at the edge of the lens body to form the lens with the heating device.

According to an embodiment of the present application, disposing the heating device at the edge of the lens body comprises: the heating device is arranged on at least one of the end face and the side face of the lens body at the edge.

According to an embodiment of the present application, disposing the heating device at the edge of the lens body comprises: the heating device is arranged between the end face of the lens body and the sealing piece of the lens.

According to an embodiment of the present application, there is an organic member between each of the lenses, the ceramic heating ring being formed as the mechanical member. According to an embodiment of the present application, disposing the heating device at the edge of the lens body comprises: a notch groove is formed in the edge; and disposing the heating device in the notch groove.

According to an embodiment of the present application, disposing the heating device at the edge of the lens body comprises: the heating device is arranged between the edge of the lens body and the side wall of the lens.

According to an embodiment of the present application, disposing the heating device at the edge of the lens body comprises: the heating device is disposed between an edge of the lens body and an edge of an adjacent lens.

According to an embodiment of the present application, disposing the heating device at the edge of the lens body comprises: the heating device is disposed between an edge of the lens body and a seal of the lens and an edge of an adjacent lens. According to at least one scheme in the lens with the heating device provided by the application, at least one of the following beneficial effects can be achieved:

1. The installation is convenient: the ceramic heating ring heating device can be used for making corresponding external dimensions according to the use requirements of the lens; in addition, in the polyimide PI heating film heating device, the polyimide PI film is a semitransparent metal flexible electrothermal film, and the shape of the polyimide PI film can be changed on the surface of some uneven lenses, so that better fit is ensured;

2. the heat utilization rate is high: the ceramic heating ring heating device can customize the appearance according to the use requirement of the lens, so that the heating device can be contacted with the lens to be heated in a large area, and the heating performance is improved; in addition, the shape of the flexible polyimide PI heating film heating device can be changed on the surface of the uneven lens, so that the heating device can be contacted with the body of the lens to be heated in a large area, the heat conduction efficiency of the polyimide PI film is higher, and the heating performance of the heating device can be greatly improved;

3. and (3) intelligent heating: the internal heating element of the ceramic heating ring heating device or the internal heating element of the polyimide PI heating film heating device has larger TCR (temperature coefficient of resistance), the resistance value of the internal heating element increases along with the rising of the ambient temperature, and the power of the heating element is larger at low temperature under the same voltage input so as to achieve rapid rising; the resistance value of the heating element is increased at high temperature, the power is reduced, and the use temperature of the heating device is ensured not to be too high; meanwhile, the TCR (temperature coefficient of resistance) can be reduced to be close to zero by changing the manufacturing materials of the heating element, so that the heating element can output at constant power;

4. Stable material quality: the ceramic heating ring heating device is stable in property, resistant to various external environments and high in reliability due to the fact that the ceramic heating ring heating device is made of ceramic materials.

5. The volume is small: the polyimide PI heating film heating device has the advantages of reduced overall film thickness, small occupied space and wider applicability.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:

FIGS. 1A-1H are cross-sectional views of a lens having a heating device according to embodiments of the present application;

FIGS. 2A-2F are cross-sectional views of a notch groove of a lens having a heating device according to embodiments of the present application;

FIG. 3 is a schematic view of the position of a fixing element in a lens according to another embodiment of the present application;

fig. 4A to 4I are a cross-sectional view and a partially enlarged view of a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 5A is a cross-sectional view of a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 5B is an enlarged partial cross-sectional view of portion Y of FIG. 5A;

FIGS. 6A-6C are cross-sectional views of conductive elements in a lens having a ceramic heating ring heating device according to embodiments of the present application;

FIG. 7A is a cross-sectional view of a conductive unit in a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 7B is a cross-sectional view of a conductive unit in a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 7B (a) is an enlarged partial cross-sectional view of portion Z in FIG. 7B;

FIG. 7C is a cross-sectional view of a conductive unit in a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 7C (a) is an enlarged partial cross-sectional view of portion A of FIG. 7C;

FIG. 7C (B) is an enlarged partial cross-sectional view of portion B of FIG. 7C;

FIG. 8A is a cross-sectional view of a conductive unit in a lens with a polyimide heating film heating device according to another embodiment of the present application;

FIG. 8B is a cross-sectional view of a conductive element in a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 8B (a) is an enlarged partial cross-sectional view of portion C of FIG. 8B;

FIG. 8C is a cross-sectional view of a conductive element in a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 8C (a) is an enlarged partial cross-sectional view of portion D of FIG. 8C;

FIG. 8C (b) is an enlarged partial cross-sectional view of portion E of FIG. 8C;

FIG. 8D is a cross-sectional view of a conductive element in a lens having a polyimide heating film heating apparatus according to another embodiment of the present application; and

fig. 8D (a) is an enlarged partial cross-sectional view of the portion F in fig. 8D.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens without departing from the teachings of the present application. And vice versa.

In the drawings, the thickness, size, and shape of the components have been slightly adjusted for convenience of description. The figures are merely examples and are not drawn to scale. As used herein, the terms "about," "approximately," and the like are used as terms of a table approximation, not as terms of a table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by one of ordinary skill in the art.

It will be further understood that terms such as "comprises," "comprising," "includes," "including," "having," "containing," "includes" and/or "including" are open-ended, rather than closed-ended, terms that specify the presence of the stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features listed, it modifies the entire list of features rather than just modifying the individual elements in the list. Furthermore, when describing embodiments of the present application, use of "may" means "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including engineering and technical terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. In addition, unless explicitly defined or contradicted by context, the particular steps included in the methods described herein are not necessarily limited to the order described, but may be performed in any order or in parallel. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1A-1C are cross-sectional views of a lens having a heating device according to an embodiment of the present application. As shown in fig. 1A to 1C, in one embodiment of the present invention, a lens 1000 is provided in a lens overall structure, which also includes a lens barrel and other lenses, such as a lens 2000. However, those skilled in the art will appreciate that the number of lenses or other related elements having heating means included in the lens may be varied to achieve the various results and advantages described in this specification without departing from the technical solutions claimed herein. The lens barrel may include a side wall for fixing lenses, each lens in the lens barrel is sequentially installed in the lens barrel along an axial direction of the lens, and an edge of each lens is installed at the side wall of the lens barrel, wherein the lenses may be fixed in the lens barrel in various manners such as a groove is formed in the side wall, and the edge of the lens is placed.

Considering that the outermost first lens in the lens, which is close to the object side, is most susceptible to the influence of temperature, climate in external environments such as rain and snow environments, low temperature environments, high temperature environments, etc., moisture is condensed on the lens surface. Therefore, alternatively, the first lens located at the object side in the lens, for example, the lens 1000 in the present embodiment is provided as a lens having a heating device, while the other lenses, for example, the lens 2000 in the present embodiment, are not easily condensed with moisture on the lens surface due to small influence from the external environment, and a general lens or a lens having a heating device can be selected.

As shown in fig. 1A, the lens 1000 is constructed of a lens body made of a transparent material having opposing first and second faces 1100, 1200, the first and second faces 1100, 1200 for passing light for imaging therethrough. As shown in fig. 1A, the first and second faces 1100, 1200 may have a generally arcuate profile, and the radius of the first face 1100 is greater than the radius of the second face and spaced apart a predetermined distance. Herein, the portion connecting the first face 1100 and the second face 1200 is referred to as an edge 1300, the edge 1300 including a face 1310a extending from the first face 1100 in a cutting direction is referred to as an "upper face" 1310a, a face 1310b extending from the second face 1200 in a cutting direction is referred to as a "lower face" 1310b (hereinafter, the upper face 1310a and the lower face 1310b are referred to as the end faces 1310), and a face 1320 extending substantially perpendicular to the upper face 1310a and the lower face 1310b and connected to the second face 1200 is referred to as a "side face" 1320.

A heating device 1400 may be provided at an end face 1310 at the edge 1300. The heating device 1400 may be a ceramic heating ring heating device 1410 (shown in fig. 1A) or a polyimide PI heating film heating device 1420 (shown in fig. 4A). However, those skilled in the art will appreciate that the type of heating device in a lens incorporating the heating device may be varied to achieve the various results and advantages described in this specification without departing from the scope of the claimed subject matter, e.g., the heating device 1400 may be one or more of a cast aluminum heater, an electric heat tracing band, a mica heat patch, etc. different devices.

When the lens is affected by external environment, such as high temperature environment, low temperature environment, high temperature environment, rain and snow environment, etc., water is condensed on the surface of the lens, the lens 1000 with the heating device 1400 is mounted, and the heating device 1400 can transfer heat to the lens 1000 by heat conduction or heat radiation, evaporate or disperse water, so that the overall weather resistance and reliability of the lens are effectively improved.

In fig. 1A to 1H, the structure and operation of the heating device 1400 are described in detail using a ceramic heating ring heating device 1410 as an example. A ceramic heating ring heating device 1410 (hereinafter referred to as heating device 1410) may be disposed at an end surface 1310 of the edge 1300, i.e., the heating device 1410 may be disposed at an upper end surface 1310a (as shown in fig. 1A) or a lower end surface 1310B (as shown in fig. 1B) of the edge 1300.

As shown in fig. 1C, heating device 1410 may also be disposed on side 1320 of lens 1000 at edge 1300; alternatively, heating device 1410 may be disposed at both end 1310 (at upper end 1310a or lower end 1310 b) and side 1320 of lens 1000 at edge 1300, such as heating device 1410 disposed at both upper end 1310a and side 1320 as shown in FIG. 1D, heating device 1410 disposed at both lower end 1310b and side 1320 as shown in FIG. 1E, or heating device 1410 disposed at both upper end 1310a, lower end 1310b, and side 1320 as shown in FIG. 1F.

The heating device 1400 may include a heating element, which may be an electric heating wire, where a temperature sensing resistor of the electric heating wire has a relatively large Temperature Coefficient of Resistance (TCR), and after power is supplied, the temperature sensing resistor of the heating element may become large along with the rise of the ambient temperature, and under the same voltage input, when the ambient temperature is relatively low, the power of the heating device 1400 is relatively large, so that rapid temperature rise may be achieved; when the ambient temperature is high, the temperature sensing resistance of the heating element increases, and the power of the heating device 1400 decreases, so that it is ensured that the temperature of the heating device 1400 is not excessively high. Thus, upon power being supplied, the heating device 1400 may heat the lens 1000 such that the temperature of the lens 1000 increases, thereby accelerating evaporation or accelerating dispersion of moisture, such as fog, frost, water droplets, or ice, etc., adhering to the first and second sides 1100, 1200 in the lens 1000. Meanwhile, the lens 1000 can be heated by the heating device 1400 after power supply, so that the first surface 1100 and the second surface 1200 in the lens 1000 are prevented from condensing moisture, the situation of unclear lens or blind area is prevented, and the imaging reliability of the lens 1000 is ensured.

Further, the heat generated by the heating device 1400 may be transferred to the lens 1000 by direct or indirect contact. First, the edge 1300 of the lens 1000 tightly fixed to the heating device 1400 receives the heat generated from the heating device 1400 uniformly by heat conduction, and then the heat is spread uniformly from the edge 1300 to the center of the lens 1000 by heat conduction and heat radiation, by which the heat is spread more uniformly, so that the moisture of the first surface 1100 and the second surface 1200 in the lens 1000 can be effectively removed, and the local overheating of the lens 1000 can be avoided.

The heating device 1400 may be a ring-like structure having a contour that matches the contour of the edge 1300 of the lens 1000 so that the heating device 1400 can be tightly secured to the edge 1300 of the lens 1000. However, those skilled in the art will appreciate that the shape and configuration of the heating device 1400 may be varied to achieve the various results and advantages described in this specification without departing from the scope of the claimed application.

It should be noted that the cross-sectional shape of the ring-like structure of the heating device 1400 may be circular, rectangular, trapezoidal, stepped, etc., and the cross-sectional shape of the heating device 1400 may be changed according to actual needs without departing from the technical solution claimed in the application, so as to obtain the respective results and advantages described in the present specification.

Heating elements (not shown) in the heating device 1400 are used to generate the heat required by the device 1400 to provide to the lens 1000 holding the heating device 1400. It may be a metal heating wire such as nickel iron wire, iron-chromium-aluminum wire, nickel-chromium wire, etc. Alternatively, the heating element may comprise one or more of the above-mentioned electrical heating wires. That is, the shape, structure, or material of the heating element may be changed to achieve the respective results and advantages described in the present specification.

Further, a mechanism 1500 may be included between each lens, for example, the mechanism 1500 may ensure that a constant safety gap is maintained in the lens, for example, between the first lens 1000 and the second lens 2000. In this application, it may be provided directly as a ceramic heating ring heating device. As shown in fig. 1G, heating device 1410 may also be disposed adjacent to machine member 1500, i.e., between lower end surface 1310b of lens 1000 and seal 1600 in the overall structure of the lens; alternatively, as shown in FIG. 1C, the heating device 1410 may be disposed between the lens 1000 and the side wall of the lens; alternatively, as shown in FIG. 1H, the heating device 1410 may directly replace the mechanism 1500, and serve to space adjacent lenses, disposed between the lower end surface 1310b of the lens 1000 and the seal 1600 in the overall structure of the lens.

Fig. 2A-2F are cross-sectional views of the notch 1330 of the edge 1300 of a lens 1000 having a heating device 1400 according to an embodiment of the present application. As shown in fig. 2A to 2F, in order to more conveniently and effectively mount the heating device 1400, a notch 1330 for receiving the heating device 1400 may be provided at the outer side of the edge 1300 of the lens 1000. The heating device 1400 is disposed in the notch 1330 and fixed on the inner wall of the notch 1330, and the notch 1330 may be a rectangular notch, a triangular notch or a circular arc notch, which is not limited herein, as long as the contact area between the heating device 1400 and the lens 1000 can be increased.

In addition, as shown in fig. 2A to 2E, a notch groove 1330 may be provided at the end surface 1310 of the lens 1000 at the edge 1300, the notch groove 1330 is provided at the lower end surface 1310B as shown in fig. 2A, the notch groove 1330 is provided at the lower end surface 1310B as shown in fig. 2B, and the notch groove 1330 is provided to have a stepped rectangular groove, the notch groove 1330 is provided at the upper end surface 1310a as shown in fig. 2C; as shown in fig. 2D and 2E, when the heating device 1400 is disposed within the notch 1330 at the end face 1310, it may extend in the direction of the side 1320. As shown in fig. 2F, a notch 1330 may be provided in the lens 1000 at a side 1320 of the edge 1300. As shown in fig. 2A-2F, the notch 1330 is exemplified as a rectangular notch, however, it should be understood by those skilled in the art that the shape and configuration of the notch 1330 may be changed to achieve the various results and advantages described in this specification without departing from the scope of the claimed technology.

Fig. 3 is a schematic view of the position of the fixing element 1402 in the lens according to an embodiment of the present application. As shown in fig. 3, in one embodiment of the present application, the heating device 1400 may further include a securing element 1402. The fixing element 1402 may be any element capable of fixing the heating device 1400 for fixing the heating device 1400 into the lens 1000 in the lens. By means of the fixing element 1402, the heating device 1400 can be tightly fixed to the inner wall of the notch 1330, so that the heat can be transferred to the edge 1300 in a contact manner all the time without being separated from the edge 1300 of the lens 1000.

In one embodiment of the present application, the fastening element 1402 may be a double sided adhesive tape with good thermal conductivity, i.e., the fastening element 1402 may be one or more of a thermally conductive glue or a thermally conductive tape. When the fixing element 1402 is a heat-conductive glue or a heat-conductive tape with good heat-conductive property, it is adhered between the heating device 1400 and the edge 1300 of the lens 1000, so that the heating device 1400 can be tightly fixed to the edge 1300 of the lens 1000. In another embodiment of the present application, the fixing element 1402 may also be an elastic element that can be placed at the edge 1300 in a compressed state, and when the lens 1000 is fixed to the side wall in the lens, the elastic element can tightly fix the heating device 1400 to the edge 1300 of the lens 1000 by means of the elastic force generated by the supporting force of the side wall, so that the heating device 1400 can directly contact and transfer heat to the edge 1300 of the lens 1000 by using heat conduction. However, it will be appreciated by those skilled in the art that the arrangement of the resilient element can be varied to achieve the various results and advantages described in this specification without departing from the technical solution as claimed in the application. For example, the resilient element may be disposed between the lens 1000 and the lens 2000.

In one embodiment of the present application, the fixing element 1402 may also be a double sided tape with good electrical conductivity, i.e. the fixing element 1402 may be one or more of conductive glue or conductive tape. When the fixing element 1402 is conductive glue or conductive tape, it is adhered between the heating device 1400 and the edge 1300 of the lens 100, so that the heating device 1400 can be tightly fixed to the edge 1300 of the lens 1000.

The fixing element 1402 may also be a locking element of the lens itself, such as an external pressing ring.

In a lens system, the heating device 1400 can be fixed between a lens and a lens barrel wall or between adjacent lenses, such as between the lens 1000 and the lens 2000 or between the lens and a spacer ring, by the fixing element 1402.

In embodiments of the present application, the heating device 1400 may be a ceramic heating ring heating device 1410. The ceramic heating ring heating device 1410 is made of ceramic materials, and has high reliability. In addition, the ceramic has good thermal conductivity and insulativity, can play a perfect protection role on the heating element, and because the ceramic heating ring heating device 1410 has low manufacturing cost and easy processing of appearance, the external dimension of the ceramic heating ring heating device 1410 can be formulated according to the use requirement, and the external shape of the ceramic heating ring heating device 1410 can be formulated according to the actual shape of the lens 1000, so that the ceramic heating ring heating device 1410 can be ensured to have larger area contact with the lens 1000 to be heated, and the utilization rate of heat energy is effectively improved.

In another embodiment of the present application, the heating device 1400 may be a polyimide PI heating film heating device 1420. The polyimide film is a semitransparent metal flexible electrothermal film, and can be well attached to the end face 1310 or the side face 1320 of the lens 1000 because the polyimide film can change shape on some uneven surfaces; at the same time, it is ensured that the contact area with the lens 1000 to be heated is sufficiently large. Further, the polyimide film itself has high heat conduction efficiency, so it can greatly transfer heat generated by the heat generating element to the closely fixed lens 1000 while protecting the heat generating element. In addition, the thickness of the polyimide film can be as low as, for example, 0.1mm, taking up very little space.

Fig. 4A to 4I are cross-sectional views of a lens 1000 having a polyimide heating film heating apparatus according to another embodiment of the present application. In fig. 4A to 4I, there are partial schematic structure diagrams of the lens portions G, H, I, J, K, L, M and N after ten times (10:1) magnification, respectively, as shown in fig. 4A, in an embodiment of the present application, the internal structure of the Polyimide (PI) heating film heating device 1420 (hereinafter referred to as heating device 1420) may be distributed as a sandwich structure of PI film 1421+double sided tape 1422+heating element+double sided tape 1422+pi film 1421. That is, a heat generating element is provided between the double polyimide PI films 1421, and the heat generating element is bonded to each polyimide PI film 1421 by a double sided tape 1422. The double sided tape 1422 may be one or more of a thermally conductive glue, a thermally conductive tape, an electrically conductive glue, and an electrically conductive tape.

Similarly, in the present embodiment, as shown in fig. 4A, the heating device 1420 may be disposed at the upper end 1310a of the lens 1000 at the edge 1300; heating means 1420 is provided at the lower end face 1310B as shown in fig. 4B; the heating device 1420 is disposed at the side 1320 at the rim 1300 as shown in fig. 4C, and may be located between the rim 1300 and the side wall of the lens; the heating means 1420 is provided at both the upper end 1310a and the side 1320 at the edge 1300 as shown in fig. 4D; the heating means 1420 is arranged at both the lower end face 1310b and the side face 1320 at the edge 1300 as shown in fig. 4E; the heating device 1420 of fig. 4F is disposed at the edge 1300 at the upper end 1310a, lower end 1310b and side 1320 at the same time; the heating device 1420 is disposed between the edge 1300 of the lens 1000 and the edge of the lens 2000 as shown in fig. 4G; the heating device 1420 is disposed between the lower end 1310b of the edge 1300 of the lens 1000 and the seal 1600 as shown in fig. 4H; and a heating device 1420 is disposed between the lower end surface 1310b of the edge 1300 of the lens 1000 and the edges of the seal 1600 and the lens 2000 as shown in fig. 4I.

Fig. 5A is a cross-sectional view of a lens having a polyimide heating film heating apparatus according to another embodiment of the present application. Fig. 5B is a schematic partial structure view of the lens portion Y of fig. 5A with ten times (10:1) magnification, and as shown in fig. 5B, in one embodiment of the present application, the internal structure of the heating device 1420 may be distributed as a sandwich structure of a PI film 1421+a double sided tape 1422+a heating element+a double sided tape 1422+a PI film 1421+a heat resistant rigid carrier 1423. That is, the PI film 1421 and the heat-resistant rigid carrier 1423 may be combined into a rigid carrier polyimide film, so that the protection unit 1405 including the rigid carrier polyimide film has good rigidity, and is convenient for accurate alignment when the heating device 1400 is mounted on the lens 1000, thereby realizing automated production. In the multi-layer structure, the double-sided tape 1422 may be one or more of a heat conductive adhesive, a heat conductive adhesive tape, a conductive adhesive tape, and a conductive adhesive tape.

Similarly, in the present embodiment, as shown in fig. 5A, the heating device 1420 may be disposed at the end face 1310 (at the upper end face 1310a or the lower end face 1310 b) of the lens 1000 at the edge 1300; the lens 1000 is at the side 1320 of the edge 1300 (as in fig. 4C); at both the end 1310 (at the upper end 1310a or at the lower end 1310 b) and the side 1320 of the lens 1000 at the edge 1300 (as shown in figures 4D, 4E and 4F); between the edge 1300 of the lens 1000 and the edge of the lens 2000 (as in fig. 4G); between the lower end 1310b of the edge 1300 of the lens 1000 and the seal 1600 (as shown in fig. 4H); and between the lower end surface 1310b of the edge 1300 of the lens 1000 and the edges of the seal 1600 and the lens 2000 (as shown in fig. 4I).

Further, in another embodiment of the present application, the heating device 1400 may further include an energy supply unit (not shown). The energy supply unit may be an electrical device such as a battery or a power source for providing electrical energy to the heating element.

Further, in another embodiment of the present application, the heating device 1400 may further include a conductive member 1403, and the design structure of the conductive member 1403 is slightly different according to whether the protection unit 1405 is a ceramic ring or a polyimide PI film.

Fig. 6A-6C are cross-sectional views of conductive elements 1403 in a lens 1000 with a ceramic heating ring heating device 1410 according to embodiments of the present application. As shown in fig. 6A to 6C, when the heating device 1400 is a ceramic heating ring heating device 1410, the conductive unit 1403 thereof may have at least 2 leads 1403a for communicating the heating element and the power supply unit. The two ends of the heating element are respectively connected with the conductive units 1403, and the conductive units 1403 are respectively connected with the positive and negative poles of the energy supply unit, so that the heating element is conducted, electric energy is converted into heat energy, and the heat energy is transferred into the fixed lens 1000.

In fig. 6A, at least two leads 1403a are designed to be mounted on the same side of heating device 1410; in fig. 6B, at least two leads 1403a are designed to be mounted on both sides of heating device 1410; in fig. 6C, at least two leads 1403a are designed and mounted at specific positions of the heating device 1410, which may be set by specific requirements of the structural design of the lens including the lens 1000, or by the resistance value of the temperature-sensitive resistor of the heating element in actual use. The connection mode of the electric conduction unit 1403 and the heating device 1410 is one or more of welding, electric conduction glue, electric conduction adhesive tape, heat conduction glue, heat conduction adhesive tape and compression connection.

Fig. 7A, 7B and 7C are cross-sectional views of a conductive unit 1403 in a lens 1000 having a polyimide heating film heating apparatus 1420 according to another embodiment of the present application, respectively. As shown in fig. 7A, 7B and 7C, when the heating device 1400 is a polyimide heating film heating device 1420, the conductive unit 1403 thereof may have at least 2 leads 1403B for communicating the heat generating element and the power supply unit. Alternatively, when the heating device 1400 is a polyimide heating film heating device 1420, the heating device 1420 may be directly extended and led out to serve as a power supply wire, and the heating wire led out of the polyimide heating film as a power supply wire portion may be relatively wide to reduce the resistance value, ensuring that the power supply wire is not divided (power supply voltage).

The two ends of the heating element are respectively connected with the conductive units 1403, and the conductive units 1403 are respectively connected with the positive and negative poles of the energy supply unit, so that the heating element is conducted, electric energy is converted into heat energy, and the heat energy is transferred into the tightly fixed lens 1000.

In fig. 7A, at least two leads 1403b are designed to be mounted on the outer end face of the polyimide film 1405 in the heating means 1420; also shown in FIG. 7B (a) is a partially schematic configuration of the lens with a ten-fold (10:1) magnification of the portion Z, as shown in FIG. 7B, at least two leads 1403B are designed to be mounted to the outer face 1405a and the outer face 1405B of the polyimide film 1405 in the heating device 1420; in fig. 7C (a) and 7C (B), there are also shown partially schematic structures of the lens with ten times (10:1) magnification of the parts a and B, respectively, as shown in fig. 7C, at least two leads 1403B are designed to be mounted on the outer side 1405B and the inner side 1405C of the polyimide film 1405 in the heating device 1420. In addition, the positions in the above figures are only examples, and the positions of the actual at least two leads 1403b may be set by the special requirements of the structural design of the lens including the lens 1000, or may be set by the resistance value of the temperature-sensitive resistor of the heating element that is actually used, for example, the end face (both inside and outside) or the side face (both inside and outside) of the polyimide film 1405, or a combination thereof. The connection mode of the electric conduction unit 1403 and the heating device 1420 is one or more of welding, electric conduction glue, electric conduction adhesive tape, heat conduction glue, heat conduction adhesive tape and compression connection.

Fig. 8A, 8B, 8C and 8D are cross-sectional views of a conductive unit 1403 in a lens 1000 having a polyimide heating film heating apparatus 1420 according to another embodiment of the present application, respectively. As shown in fig. 8A, 8B, 8C and 8D, when the heating device 1400 is a polyimide heating film heating device 1420, the conductive unit 1403 thereof may have at least 2 leads 1403C for communicating the heating element and the power supply unit. The two ends of the heating element are respectively connected with the conductive units 1403, and the conductive units 1403 are respectively connected with the positive and negative poles of the energy supply unit, so that the heating element is conducted, electric energy is converted into heat energy, and the heat energy is transferred into the fixed lens 1000. In the present embodiment, a heat resistant hard carrier is added to the polyimide PI heater film, and thus the design mounting position of at least 2 leads 1403c is different from the above-described at least 2 leads 1403a and at least 2 leads 1403 b.

In fig. 8A, at least two leads 1403c are designed to be mounted on the outer end face 1405a of the polyimide film 1405 in the heating means 1420; also shown in FIG. 8B (a) is a partially schematic configuration of a lens with a ten-fold (10:1) magnification of portion C, as shown in FIG. 8B, with at least two leads 1403C designed to be mounted on an outer side 1405B of polyimide film 1405 in heating device 1420; in fig. 8C (a) and 8C (b), there are also shown partially schematic structures of the lens with ten times (10:1) magnification of the parts D and E, respectively, as shown in fig. 8C, at least two leads 1403C are designed to be mounted on the outer end face 1405a and the inner side 1405C of the polyimide film 1405 in the heating means 1420; fig. 8D (a) also shows a schematic partial structure in which the lens portion F is enlarged ten times (10:1), and as shown, the polyimide heating film is extended to each position of the heating means 1420 by being used as an extension line of at least two leads 1403c, and is electrically connected to the heating element and the power supply unit. In addition, the positions in the above figures are only examples, and the positions of the actual at least two leads 1403c may be set by the special requirements of the structural design of the lens including the lens 1000, or may be set by the resistance value of the temperature-sensitive resistor of the heating element that is actually used, for example, the end face (both inside and outside) or the side face (both inside and outside) of the polyimide film 1405, or a combination thereof. The connection mode of the electric conduction unit 1403 and the heating device 1420 is one or more of welding, electric conduction glue, electric conduction adhesive tape, heat conduction glue, heat conduction adhesive tape and compression connection. The above description is merely illustrative of the implementations of the application and of the principles of the technology applied. It should be understood by those skilled in the art that the scope of protection referred to in this application is not limited to the specific combination of the above technical features, but also encompasses other technical solutions formed by any combination of the above technical features or their equivalents without departing from the technical concept. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. A lens with heating device, includes the lens body, the lens body has relative first face and second face, and connects first face with the edge of second face, its characterized in that, the lens sets up in on-vehicle camera lens, on-vehicle camera lens still includes the sealing member, the lens still includes:

a heating device which is arranged between the edge of the lens body and the sealing member along the direction perpendicular to the optical axis of the vehicle-mounted lens through a fixing element, is in direct contact with the edge of the lens body and the sealing member, is used for transferring heat to the lens body after power is supplied, is configured as a ceramic heating ring or a polyimide heating film with a heating element arranged inside, the heating element is a metal electric heating wire,

the layered structure of the polyimide heating film sequentially comprises a polyimide film, a double-sided tape, a heating element, a double-sided tape, a polyimide film and a heat-resistant hard carrier, or sequentially comprises a polyimide film, a double-sided tape, a heating element, a double-sided tape and a polyimide film; and

The fixing element comprises at least one of an electrically conductive glue, an electrically conductive tape, a thermally conductive glue and a thermally conductive tape.

2. The lens of claim 1, wherein the lens is provided with a notched groove, the heating device being disposed in the notched groove.

3. The lens of claim 1 wherein the securing element is a resilient element disposed in compression on the rim.

4. The lens of claim 1 wherein the heating means has an annular configuration having a contour matching a contour of the rim,

wherein the cross-sectional shape of the annular structure in a direction parallel to the optical axis includes a circle, a rectangle, a trapezoid, and a step.

5. The lens of claim 1 wherein there is an organic member between each of the lenses, the ceramic heating ring being formed as the mechanical member.

6. The lens of claim 1, wherein the double sided adhesive comprises at least one of a thermally conductive glue, a thermally conductive tape, an electrically conductive glue, and an electrically conductive tape.

7. The lens of any one of claims 1-6, wherein the heating device further comprises a conductive unit and an energizing unit, the conductive unit comprising at least two leads for electrically connecting the heating element and the energizing unit.

8. The lens of claim 7, wherein the conductive unit is connected to the heat generating element by one or more of welding, conductive glue, conductive tape, and compression connection.

9. A vehicle-mounted lens, characterized by comprising:

a lens barrel having a side wall; and

a plurality of lenses secured by the side wall of the barrel, wherein at least one of the plurality of lenses is a lens having a heating device as claimed in any one of claims 1-8.

10. A heating device for a lens, the lens comprising a lens body having opposing first and second faces, and an edge connecting the first and second faces,

the lens is arranged in the vehicle-mounted lens, the vehicle-mounted lens further comprises a sealing element, the heating device is arranged between the edge of the lens body and the sealing element and is in direct contact with the edge of the lens body and the sealing element along the direction perpendicular to the optical axis of the vehicle-mounted lens through a fixing element, and the heating device comprises:

a ceramic heating ring or polyimide heating film provided with a heating element, wherein the heating element is a metal electric heating wire,

11. The heating device of claim 10, wherein the fixing member is an elastic member, and the ceramic heating ring or the polyimide heating film is fixed to the rim by an elastic force of the elastic member.

12. The heating device of claim 10, wherein the double-sided tape comprises at least one of a thermally conductive glue, a thermally conductive tape, an electrically conductive glue, and an electrically conductive tape.

13. The heating device of claim 10, wherein the ceramic heating ring or the polyimide heating film has a ring-shaped structure,

14. The heating device of any one of claims 10-13, further comprising a conductive unit and an energy supply unit, the conductive unit comprising at least two leads for electrically connecting the heating element and the energy supply unit.

15. The heating device of claim 14, wherein the conductive unit is connected to the heating element by one or more of welding, conductive glue, conductive tape, and compression connection.

16. A method for preparing an in-vehicle lens including a heating device, the method comprising:

preparing a heating device according to any one of claims 10-15;

disposing the heating device on the lens to form a lens having a heating device; and

a plurality of lenses included in the vehicle-mounted lens are arranged on a lens barrel,

wherein, the lens with heating device includes the lens body, the lens body has opposite first face and second face, and connects the edge of first face with the second face, with heating device set up in the lens to form the lens with heating device includes:

The heating device is arranged between the edge of the lens body and the sealing piece of the vehicle-mounted lens along the direction perpendicular to the optical axis of the vehicle-mounted lens through the fixing element and is in direct contact with the edge of the lens body and the sealing piece so as to form the lens with the heating device.

17. The method of claim 16, wherein a machine member is disposed between each of the lenses, the ceramic heating ring being formed into the machine member.

18. The method of claim 16, wherein disposing the heating device at the edge of the lens body comprises:

a notch groove is formed in the edge; and

the heating device is arranged in the notch groove.