CN113376932A

CN113376932A - Heating antifogging lens subassembly

Info

Publication number: CN113376932A
Application number: CN202110788523.7A
Authority: CN
Inventors: 宁小刚
Original assignee: Sunex Precision Optics Kunshan Co ltd
Current assignee: Sunex Precision Optics Kunshan Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-09-10

Abstract

The invention provides a heating anti-fog lens assembly which comprises a lens (1) and a heating element (100), wherein the lens (1) comprises a first lens (13) and a lens barrel (11), the heating element (100) is provided with an electrode wire (2) and a conductive heating element (3), a connecting end (23) of the electrode wire (2) is respectively and electrically connected with the conductive heating element (3), a connecting end (22) of the electrode wire (2) is connected with a power supply so as to supply power to the conductive heating element (3), and the conductive heating element (3) is arranged on the periphery of the first lens (13) so as not to influence the light transmission of a light transmission area (130) used for imaging of the first lens (13). The conductive heating element (3) of the heating antifogging lens assembly is arranged on the periphery of the inner surface (131) of the first lens (13) so as not to influence the light transmission of a light transmission area (130) used for imaging of the first lens (13) and have no risks such as shadow, stray light and the like; moreover, the conductive heating element (3) is arranged at the periphery of the first lens (13), is not influenced by external weather and has good durability.

Description

Heating antifogging lens subassembly

Technical Field

The invention relates to the technical field of lens devices, in particular to a lens assembly for removing fog.

Background

The lens is exposed to air when in use, and fog is generated on the surface of the lens, so that the shooting effect is seriously influenced, and therefore, the anti-fog or the defogging of the lens is necessary. The traditional anti-fog lens is mainly realized by three ways: 1) plating an antifogging film on the surface of the lens to prevent the surface of the lens from fogging; 2) plating an ITO conductive film on the surface of the lens, and performing antifogging in an electrothermal mode; and 3) embedding a fine metal wire on the surface of the lens for electric heating antifogging.

However, the above three methods all have certain defects, and cannot well meet the requirements of practical application. In the mode 1), the antifogging film is mainly formed by plating a super-hydrophilic film layer, so that water vapor on the lens is not formed into water drops but is spread out, the influence of the water vapor on vision is eliminated, and the surface of the lens is not prevented from absorbing the water vapor. When wearing video glasses in the short time, this antifogging membrane can prevent really that steam from causing the influence to the vision because of the fogging on the lens, but when wearing video glasses for a long time, although can pave steam on the antifogging membrane, but accumulate to a certain extent after, the steam layer of lens surface accumulation can the thickening, the lens that has the steam layer will exert an influence to the vision to because steam on the lens is difficult to clear away, the steam of accumulation (including the sweat) causes the erosion to other electronic parts of video glasses easily. And the antifogging film of this mode mainly adopts processes such as evaporation coating film, soaking, and the process is many and complicated, and the yield is lower.

In the mode 2), because the film resistance of the ITO conductive film is high, a high voltage needs to be applied to two ends of the conductive film to generate appropriate heat for preventing fog. When the lens is applied, the lens is not suitable for adding a high-voltage power supply. Meanwhile, because the module has a small volume, no power is supplied to the anti-fog lens.

In the mode 3), since the lens has a high requirement for the imaging quality, the heating by adding the metal wire to prevent fog affects the imaging effect of the lens. Therefore, the method c cannot be applied to the field of imaging lenses at all.

In summary, it is an important subject in the art to develop a lens suitable for an imaging lens and capable of achieving a good anti-fog effect.

Chinese patent publications CN112711161A and CN112711162A disclose a lens barrel, an imaging assembly, and a lens. The imaging component comprises a lens group, a heating element and a lens barrel, the lens barrel comprises a shell and an electric connector, and the lens group comprises a lens; the heating element is arranged corresponding to the lens; the shell is used for accommodating the lens group and the heating element; the electric connecting piece and the shell are integrally formed and penetrate through the shell, one end of the electric connecting piece is located in the shell and is used for being electrically connected with the heating element, the other end of the electric connecting piece extends out of the shell, and the electric connecting piece is used for supplying power to the heating element so as to control the heating element to heat the lens for demisting. However, the heating element 25 is required to cover the whole surface of the first surface 221 or the second surface 222 (see fig. 3) of the lens, so that the heating element covers the light-transmitting area of the lens, even a transparent film affects the light transmittance of the lens, affects the shooting quality, and the coating process of the heating element is complicated.

Disclosure of Invention

The invention aims to provide a heating antifogging lens assembly which is formed by forming a conductive coating film on a non-light-transmitting area so as to enable the light transmission of a lens not to be influenced.

In order to achieve the above purpose of the present invention, the present invention provides a heating anti-fog lens assembly, which includes a lens (1) and a heating element (100), wherein the lens (1) includes a first lens (13) and a lens barrel (11), the heating element (100) is provided with an electrode wire (2) and a conductive heating member (3), a connection end (23) of the electrode wire (2) is electrically connected to the conductive heating member (3), a connection end (22) of the electrode wire (2) is connected to a power supply so as to supply power to the conductive heating member (3), and the conductive heating member (3) is disposed at the periphery of the first lens (13) so as not to affect the light transmission of a light transmission area (130) of the first lens (13) for imaging.

Further, the electric conductive heating member (3) is an annular conductive diaphragm formed at the periphery of the inner surface (131).

Further, the conductive heating member (3) is disposed in a non-light-transmitting area of an inner surface (131) of the first lens (13).

Furthermore, the extension part (21) of the electrode wire (2) extends along the outer peripheral surface (111) of the lens barrel (11) and forms an electric connection end part (22) at the lower end part.

Further, the first lens (13) is arranged at the outer end part of the lens barrel (11), the outer surface (132) of the first lens (13) is exposed in the air, and the inner surface (131) thereof comprises a light-transmitting part 130 and a part of a connecting part with the lens barrel 11.

Further, the lens (1) comprises at least two lenses, the first lens (13) is arranged inside the lens barrel (11), and the inner surface (131) of the first lens comprises a light-transmitting area (130) and a part of the part connected with the lens barrel (11).

Further, the electrode wire (2) is a Flexible Printed Circuit (FPC).

Still further, the annular conductive membrane includes a primer layer and a conductive layer formed on the primer layer.

Furthermore, the connecting end (23) is bent to form a flat part (231), and the flat part (231) is contacted with the conductive heating part (3) through the elastic force of an elastic element to form a separable electrical connection.

Further, the elastic member is a plurality of conductive springs (210) disposed between an upper surface of the flat portion (231) and a lower surface of the conductive heating member (3).

Further, the elastic member is a rubber ring (211) which is provided on the lower surface of the flat portion (231) so as to contact and form an electrical connection between the upper surface of the flat portion (231) and the lower surface of the conductive heating member (3).

Further, the bottom layer is any one or combination of glass, a silicon dioxide film layer or hardened paint.

Further, the conducting layer is a nickel-chromium alloy film layer.

The heating element of the heating anti-fog lens assembly is provided with an electrode wire (2) and a conductive heating element (3), wherein the conductive heating element (3) is arranged on the periphery of the inner surface (131) of the first lens (13) so as not to influence the light passing (light transmission) of a light passing area (130) of the first lens (13) for imaging, and risks such as shadows or parasitic light and the like are avoided; moreover, the conductive heating element (3) is arranged at the periphery of the first lens (13), is not influenced by external weather and has good durability.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a heating anti-fog lens assembly provided by the invention.

Fig. 2 is a schematic structural view of a heating electrode wire and an electric conduction heating element according to the present invention.

Fig. 3 is an exploded view of an embodiment of a heated anti-fog lens assembly provided by the invention.

Fig. 4 is a schematic structural diagram of an embodiment of an electric heating element for heating an anti-fog lens assembly provided by the invention.

Fig. 5 is a schematic structural diagram of another embodiment of a heated anti-fog lens assembly provided by the invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the present invention provides a heating antifogging lens assembly, which comprises a lens 1 and a heating element 100, wherein the lens 1 is provided with a first lens 13 and a lens barrel 11, in this embodiment, the lens 1 comprises more than two lenses, the lens 1 comprises other lens components 19 besides the first lens 13, and the lenses together form a lens assembly (see fig. 3). In the present embodiment, the first lens 13 is mounted on the outermost side of the lens barrel 1, and has an outer surface 132 exposed to air and an inner surface 131 including a light-transmitting region 130 and a portion (non-light-transmitting region) connected to the lens barrel 11. The heating element 100 is provided with two electrode wires 2 and an electric heating member 3, the connecting ends 23 of the two electrode wires 2 are respectively and electrically connected with the electric heating member 3 in a separable manner, the extending part 21 of the electrode wire 2 is arranged on the outer circumferential surface 111 of the lens barrel 11 and extends from the outer end part thereof to the inner side (downward in the figure) of the lens 1, and an electric connecting end part 22 is formed at the end part. The conductive heating member 3 is disposed at the periphery of the inner surface 131 of the first lens 13 so as not to affect the light transmission or light transmission of the light transmission region 130 for imaging of the first lens 13. In the present embodiment, the lens barrel 11 has a flange-type head for mounting the first lens 13, and the lens cap 12 covers the lens 13 for fixing the first lens 13. The O-ring 9 is disposed in the groove 113 of the lens barrel 11 and located between the first lens 13 and the lens barrel 11, so that the first lens 13 and the lens barrel 11 are hermetically connected through the O-ring 9 to prevent external water or air from entering the inside of the lens assembly. The sealant 10 is used to further seal the lens 1.

Referring to fig. 2 and 4, in the present embodiment, the heating conductive member 3 is a conductive film formed on the periphery of the inner surface 131, but may be a conductive strip or a conductive block embedded in the inner surface 131. The electric heating element 3 includes a primer layer formed on the periphery of the inner surface 131 and an electrically conductive layer formed on the primer layer. The bottom layer is any one or combination of glass, a silicon dioxide film layer or hardened paint, and the conducting layer is a nickel-chromium alloy film layer. The conductive heating part 3 is annular and adopts a PVD physical vapor deposition process or a sputtering process. The power connection end 22 can be extended to cover the surface 111 of the lens barrel 11 and then connected to a power supply.

Referring to fig. 1 and 2 again, the connecting end 23 of the electrode wire 2 is bent to form a flat portion 231, and the flat portion 231 is in contact with the conductive heating member 3 by the elastic force of an elastic member to form a separable electrical connection. In one embodiment of the present invention illustrated in fig. 1, the elastic member is two conductive springs 210 disposed between the upper surface of the flat portion 231 and the lower surface of the conductive heating member 3 at symmetrical ends of a diameter line of the annular conductive heating member 3, respectively. The flat 231 is on the end step 114 of the barrel 11. The conductive spring 210 is made of a conductive metal, and its elastic restoring force makes its upper and lower surfaces abut against the lower surface of the conductive heating member 3 and the upper surface of the flat portion 231, respectively, after being compressed, so that the conductive heating member 3 is in contact with the connection end 23 of the electrode wire 2 to form an electrical connection.

Referring to fig. 5, in another embodiment of the present invention, the elastic member is a rubber ring 211 disposed on the lower surface of the flat portion 231 and placed on the end step 114 of the lens barrel 11. After the rubber ring 211 is compressed, the elastic restoring force of the rubber ring makes the upper surface of the flat part 231 closely attached to the lower surface of the conductive heating member 3, so that the conductive heating member 3 is in contact with the connecting end 23 of the electrode wire 2 to form an electrical connection.

Referring to fig. 3, the conductive heating member 3 of the heating element for heating the anti-fog lens assembly provided by the invention is separable from the connecting end 23 of the electrode wire 2, so that the installation and the disassembly are convenient.

From the above description, it can be seen that the heating element of the heating anti-fog lens assembly provided by the present invention is provided with two electrode wires 2 and a conductive heating element 3, and the conductive heating element 3 is arranged at the periphery of the first lens 13 so as not to affect the light passing of the light passing area 130 for imaging of the first lens 13, and there is no risk of shadows or parasitic light. Moreover, if the electric conductive heating member 3 is provided on the periphery of the inner surface 131 of the first lens 13, it is not affected by the external weather and has good durability.

In addition, if the connecting ends 23 of the two electrode wires 2 are respectively and electrically connected with the conductive heating element 3 in a separable way in the above embodiment, the installation and the maintenance are both convenient.

It should be noted that, for those skilled in the art, the following changes can be made on the basis of the above embodiments of the present invention, and the object of the present invention can also be achieved:

1. the conductive heating element 3 and the electrode wire 2 can also form an inseparable or inseparable electrical connection through welding or conductive glue.

2. The heating element 3 may be disposed on the inner surface 131 and likewise the outer surface 132 of the first lens 13.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides a heating antifog lens subassembly, its characterized in that, it includes camera lens (1) and heating element (100), camera lens (1) includes first lens (13) and lens cone (11), heating element (100) are equipped with electrode line (2) and electrically conductive heating member (3), link (23) of electrode line (2) respectively with electrically conductive heating member (3) electric connection, the end (22) that connects of electrode line (2) are connected so that supply power to electrically conductive heating member (3), electrically conductive heating member (3) set up the periphery of first lens (13) is in order not to influence the logical light of the logical light zone (130) that is used for the formation of image of first lens (13).

2. A heating anti-fog lens assembly as claimed in claim 1, wherein the conductive heating member (3) is an annular conductive film formed at the periphery of the inner surface (131).

3. A heating anti-fog lens assembly as claimed in claim 1, wherein the conductive heating element (3) is disposed on an inner surface (131) of the first lens (13).

4. A heated anti-fog lens assembly as claimed in claim 1, wherein the extension portion (21) of the electrode wire (2) extends along the outer peripheral surface (111) of the lens barrel (11) and forms a power receiving end portion (22) at a lower end portion.

5. A heated anti-fog lens assembly as claimed in claim 1, wherein the first lens (13) is mounted on the outermost side of the lens barrel (1) at the outer end of the lens barrel (11), the outer surface 132 of the first lens (13) is exposed to the air, and the inner surface 131 thereof includes a light-transmitting portion (130) and a portion of the connecting portion with the lens barrel (11).

6. A heating anti-fog lens assembly as claimed in claim 1, wherein the lens (1) comprises at least two lenses, the first lens (13) is disposed inside the lens barrel (11), and the inner surface (131) thereof comprises a light-transmitting area (130) and a portion thereof connected to the lens barrel (11).

7. A heated anti-fog lens assembly as claimed in claim 1, wherein the electrode wire (2) is a flexible circuit board (FPC).

8. A heated anti-fog lens assembly as claimed in claim 2, wherein the annular conductive film comprises a primer layer and a conductive layer formed on the primer layer.

9. A heating anti-fog lens assembly as claimed in claim 5, wherein the connecting end (23) is bent to form a flat portion (231) parallel to the inner surface (131), and the flat portion (231) is in contact with the conductive heating member (3) by the elastic force of a fixed elastic member to form a separable electrical connection.

10. A heating anti-fog lens assembly as claimed in claim 6, wherein the elastic member is a plurality of conductive springs (210) disposed between an upper surface of the flat portion (231) and a lower surface of the conductive heating member (3).

11. A heating anti-fog lens assembly as claimed in claim 6, wherein the elastic member is a rubber ring (211) which is provided on the lower surface of the flat portion (231) so that electrical connection is formed between the upper surface of the flat portion (231) and the lower surface of the conductive heating member (3) by contact.

12. A heated anti-fog lens assembly as claimed in claim 2, wherein the primer layer is any one or a combination of glass, a silica film layer or hardened paint.

13. The heating anti-fog lens assembly as claimed in claim 2, wherein the conductive layer is a nickel chromium alloy film layer.