Lens assembly and camera

Abstract

The present application provides a lens assembly and a camera, the lens assembly includes a housing, a lens, a sealing ring and a pressing piece; the housing is provided with a lens barrel for mounting the lens, the sealing ring includes a sleeve portion and a convex ring portion formed by radially extending outward from one end of the sleeve portion, the sleeve portion is sealingly sleeved on the outer wall of the lens, the pressing piece is detachably arranged on the inner side of the housing and the convex ring portion is sealed and pressed between the pressing piece and the inner side of the housing. The sleeve portion is used to achieve a sealed connection between the sealing ring and the lens, the convex ring portion and the pressing piece are used to achieve a sealed connection between the sealing ring and the housing, thereby achieving a sealed connection between the lens and the housing, and the sealing method enables the lens to be directly exposed to the outside of the housing, compared with the prior art in which the lens is arranged inside the housing, the viewing angle width of the lens in the present application is guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of cameras, and more specifically, to a lens assembly and a camera. Background Art

[0002] With the development of social economy and the improvement of people's living standards, people are paying more and more attention to the safety of their lives and property. This has prompted the rapid development and growth of the video security surveillance market. Cameras can be seen everywhere, such as indoor cameras, outdoor cameras, car cameras, etc.

[0003] When the camera is used outdoors, it needs to have a good waterproof function, so that the connection between the camera housing and the camera lens needs to be sealed to prevent water from entering the housing and damaging the circuit board inside the camera. Currently, the lens itself is waterproof, but the lens cannot be squeezed when installed. Therefore, the current sealing method between the lens and the housing is to set a glass sheet at the front end of the lens and seal it with the housing. The lens is set in the housing, so that the lens is at least moved back by the thickness of a glass sheet relative to the outer surface of the housing. In this way, the housing blocks part of the viewing angle of the lens, so that the viewing angle width of the lens is reduced, thereby affecting the framing performance of the camera. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a lens assembly and a camera to solve the technical problem in the prior art that the lens angle of view is reduced due to the lens being sealed with a glass sheet and a housing.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a lens assembly, including a shell, a lens, a sealing ring and a pressing plate; the shell is provided with a barrel portion for mounting the lens, the sealing ring includes a sleeve portion and a convex ring portion radially extending outward from one end of the sleeve portion, the sleeve portion is sealingly sleeved on the outer side wall of the lens, the pressing plate is detachably arranged on the inner side of the shell and the convex ring portion is sealingly pressed between the pressing plate and the inner side of the shell.

[0006] In one embodiment, after the sleeve portion and the lens are sealed and assembled, a gap is provided between the outer peripheral surface of the sleeve portion and the inner wall of the lens barrel portion.

[0007] In one embodiment, the inner wall of the sleeve portion is provided with a plurality of first protrusions protruding inwardly along the radial direction, and the first protrusions are interference fit with the outer wall of the lens.

[0008] In one embodiment, a ring groove is provided on a side of the convex ring portion facing the shell, and a second convex ring that can abut against the ring groove is provided on an inner side of the shell.

[0009] In one embodiment, an extension ring is provided on the side of the convex ring portion facing away from the annular groove. The extension ring is coaxially arranged with the sleeve portion. The inner diameter of the extension ring is larger than the inner diameter of the sleeve portion. A guiding slope is provided at the inner wall connection between the extension ring and the sleeve portion.

[0010] In one embodiment, the extension ring and the annular groove are coaxially arranged.

[0011] In one embodiment, the pressing plate includes a pressing ring and a folding plate arranged at one end of the pressing ring and folded radially outward, and the end of the pressing ring away from the folding plate is used to seal and press the side of the convex ring portion away from the annular groove, and the folding plate is detachably connected to the shell through a fastener.

[0012] In one embodiment, the extension ring is inserted into the pressure ring.

[0013] In one embodiment, a positioning hole is provided on the folding piece, and a positioning column is provided on the inner side of the shell and is sleeved with the positioning hole.

[0014] Another object of the present application is to provide a camera, comprising the lens assembly as described above.

[0015] The beneficial effects of a lens assembly and a camera provided in the present application are that: the sleeve portion is used to realize a sealed connection between the sealing ring and the lens, the convex ring portion and the pressing plate are used to realize a sealed connection between the sealing ring and the housing, thereby realizing a sealed connection between the lens and the housing, and the sealing method enables the lens to be directly exposed to the outside of the housing, which ensures the viewing angle width of the lens in the present application compared to the prior art in which the lens is arranged inside the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic cross-sectional view of a lens assembly provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 A schematic cross-sectional view of a sealing ring in a lens assembly provided in an embodiment of the present application;

[0020] Figure 4A schematic diagram of the oblique upward view of the pressing plate in the lens assembly provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the structure for installing a sealing ring and a pressing piece on the shell of the lens assembly provided in an embodiment of the present application.

[0022] Among them, the reference numerals in the figure are:

[0023] 1. Shell; 11. Lens barrel; 12. Second convex ring; 13. Mounting column; 14. Positioning column; 2. Lens; 3. Sealing ring; 31. Sleeve portion; 311. First convex ring; 32. Convex ring portion; 321. Ring groove; 33. Extension ring; 34. Guide slope; 4. Pressing plate; 41. Pressing ring; 42. Folding plate; 421. Positioning hole; 422. Fastener. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] like Figure 1 and Figure 2As shown, a lens assembly provided in an embodiment of the present application is now described. The lens assembly includes a housing 1, a lens 2, a sealing ring 3 and a pressing piece 4. In this embodiment, the housing 1 is a plastic shell, the sealing ring 3 is a silicone ring, the lens 2 is a waterproof lens, and the pressing piece 4 is a metal part or a plastic part.

[0029] Specifically, the shell 1 is provided with a barrel portion 11 for mounting the lens 2, and a channel is provided inside the barrel portion 11. The barrel portion 11 is used to connect the inner side of the shell 1 with the outside of the shell 1. The lens 2 can be exposed to the outside of the shell 1 through the barrel portion 11, thereby ensuring the viewing angle width of the lens 2.

[0030] like Figure 2 and Figure 3 As shown, in this embodiment, the sealing ring 3 includes a sleeve portion 31 and a convex ring portion 32 formed by radially extending outward from one end of the sleeve portion 31. The sleeve portion 31 is sealingly sleeved on the outer wall of the lens 2 and can be inserted into the lens barrel portion 11 along with the lens 2, and the convex ring portion 32 is attached to the inner surface of the housing 1. The pressing piece 4 is detachably arranged on the inner side of the housing 1. When the pressing piece 4 is fixed on the inner side of the housing 1, the convex ring portion 32 is sealed and pressed between the pressing piece 4 and the inner side of the housing 1, so as to realize the sealed connection between the convex ring portion 32 and the housing 1.

[0031] The present application provides a lens assembly, wherein the sleeve portion 31 is used to achieve a sealed connection between the sealing ring 3 and the lens 2, and the convex ring portion 32 and the pressing plate 4 are used to achieve a sealed connection between the sealing ring 3 and the housing 1, thereby achieving a sealed connection between the lens 2 and the housing 1, and the sealing method enables the lens 2 to be directly exposed to the outside of the housing 1, which ensures the viewing angle width of the lens 2 compared to the prior art in which the lens is arranged inside the housing.

[0032] like Figure 2 As shown, in this embodiment, the sleeve portion 31 and the lens 2 are installed in the lens barrel portion 11, and when the sleeve portion 31 and the lens 2 are sealed and assembled, there is a gap between the outer peripheral surface of the sleeve portion 31 and the inner wall of the lens barrel portion 11. The function of the gap is to reduce the interference stress of the sleeve portion 31 on the lens 2, and prevent the lens 2 from being out of focus or defocused when the sleeve portion 31 is squeezed and deformed with the inner wall of the lens 2, thereby ensuring the angle of view accuracy of the lens 2.

[0033] like Figure 2 and Figure 3As shown, in this embodiment, the inner wall of the sleeve portion 31 is provided with a plurality of first convex rings 311 extending radially inward, and the first convex rings 311 are interference fit with the outer wall of the lens 2. The first convex rings 311 are interference fit with the outer wall of the lens 2, and are used to achieve a sealed connection between the sealing ring 3 and the lens 2, so that the influence of the sealing ring 3 on the lens 2 can be reduced while ensuring the sealing performance. At the same time, after the first convex rings 311 are interference fit with the outer wall of the lens 2, there is a gap between the outer peripheral surface of the sleeve portion 31 and the inner wall of the lens barrel portion 11. In this embodiment, the surface of the first convex rings 311 is an arc surface, so that the first convex rings 311 and the lens 2 are easily interference fitted. In this embodiment, two first convex rings 311 are arranged at intervals, and in other embodiments, one, three or four first convex rings 311 can be arranged, and the specific number can be selected according to the waterproof grade requirements.

[0034] like Figure 2 and Figure 3 As shown, in this embodiment, a ring groove 321 is provided on the side of the convex ring portion 32 facing the housing 1, and a second convex ring 12 that can abut against the ring groove 321 is provided on the inner side of the housing 1. The second convex ring 12 and the ring groove 321 are provided to improve the sealing between the convex ring portion 32 and the housing 1 on the one hand, and to position the sealing ring 3 when it is installed on the housing 1 on the other hand, so as to ensure the convenience of installing the sealing ring 3.

[0035] like Figure 2 and Figure 3 As shown, in this embodiment, an extension ring 33 is provided on the side of the convex ring portion 32 away from the annular groove 321. The extension ring 33 is coaxially arranged with the sleeve portion 31. The inner diameter of the extension ring 33 is larger than the inner diameter of the sleeve portion 31. A guide slope 34 is provided at the inner wall connection between the extension ring 33 and the sleeve portion 31. In this embodiment, the sealing ring 3 is first installed on the housing 1 through the cooperation of the second convex ring 12 and the annular groove 321, and then the convex ring portion 32 is sealed against the housing 1 through the pressing sheet 4, and finally the lens 2 is sealed and connected with the sleeve portion 31, thereby completing the sealed assembly of the lens 2 and the housing 1. Therefore, the provision of the extension ring 33 facilitates the lens 2 to not touch the housing 1 during the assembly process, and plays a protective role for the lens 2. The guide slope 34 has a guiding role, so that the lens 2 and the sleeve portion 31 are interference-fitted.

[0036] In this embodiment, the extension ring 33 and the annular groove 321 are coaxially arranged. Specifically, the extension ring 33 and the annular groove 321 are on the same straight line in the axial direction of the sleeve portion 31. Since the setting of the annular groove 321 will make the corresponding position on the convex ring portion 32 thinner, the setting of the extension ring 33 can make up for the thickness of the position, thereby ensuring that the annular groove 321 of the convex ring portion 32 has sufficient deformation thickness.

[0037] like Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, the cross section of the pressing piece 4 is T-shaped, and the pressing piece 4 includes a pressing ring 41 and a folding piece 42 arranged at one end of the pressing ring 41 and folded radially outward. The end of the pressing ring 41 away from the folding piece 42 is used for sealing against the side of the convex ring part 32 away from the annular groove 321, and the folding piece 42 is detachably connected to the housing 1 through a fastener 422. During installation, the pressing ring 41 presses against the convex ring part 32, and then the folding piece 42 is fixed to the inner side of the housing 1 by the fastener 422. During the fixing process, the pressing ring 41 presses and deforms the convex ring part 32, so that the convex ring part 32 is in close contact with the housing 1 to achieve a sealed connection. In this embodiment, the end face of the pressing ring 41 used to press the convex ring part 32 is chamfered, so that the pressing ring 41 can press the convex ring part 32 softly, ensuring the sealing pressing effect of the pressing ring 41 and not damaging the convex ring part 32.

[0038] like Figure 2 As shown, the extension ring 33 is inserted into the pressing ring 41, and the purpose of this arrangement is to ensure that the lens 2 does not touch the pressing plate 4 during the assembly process, thereby protecting the lens 2. The position where the pressing ring 41 presses against the convex ring portion 32 and the position where the second convex ring 12 presses against the annular groove 321 are staggered in the axial direction, so that the two sides of the convex ring portion 32 have two deformation positions, thereby ensuring its sealing effect.

[0039] like Figure 4 and Figure 5 As shown, in this embodiment, a plurality of mounting posts 13 are provided on the inner side of the housing 1, and the fasteners 422 are screws. The fasteners 422 are threadedly connected to the mounting posts 13 to achieve a detachable connection of the pressing piece 4. A plurality of positioning holes 421 are also provided on the folding piece 42, and a positioning post 14 is provided on the inner side of the housing 1 to be sleeved with the positioning holes 421. The positioning post 14 cooperates with the positioning hole 421 to improve the installation efficiency of the pressing piece 4 on the one hand, and to prevent the pressing piece 4 from rotating during the screw locking process on the other hand, so as to ensure that the sealing ring 3 does not rotate. In this embodiment, three mounting posts 13 are provided and are equidistantly distributed in a triangular shape, so as to ensure that the pressure of the pressing ring 41 against the convex ring portion 32 is relatively uniform, thereby ensuring the sealing performance.

[0040] The embodiment of the present application also provides a camera, the camera includes the lens assembly as described above, in this embodiment, the housing 1 includes a front shell and a rear shell, the sealing ring 3 and the lens 2 are arranged on the front shell, the front shell and the rear shell are sealed and assembled to form an installation cavity, and the installation cavity is provided with a circuit board and other structures. The camera provided in the embodiment of the present application has the advantages of good sealing and wide viewing angle due to the use of the above-mentioned lens assembly.

[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A lens assembly, characterized in that: The invention comprises a shell, a lens, a sealing ring and a pressing piece; the shell is provided with a lens barrel portion for installing the lens, the sealing ring comprises a sleeve portion and a convex ring portion radially extending outward from one end of the sleeve portion, the sleeve portion is sealingly sleeved on the outer side wall of the lens, the pressing piece is detachably arranged on the inner side of the shell and seals the convex ring portion between the pressing piece and the inner side of the shell, a ring groove is arranged on the side of the convex ring portion facing the shell, a second convex ring which can abut against the ring groove is arranged on the inner side of the shell, the pressing piece comprises a pressing ring, the pressing piece comprises a pressing ring and a folding piece arranged at one end of the pressing ring and folded radially outward, the end of the pressing ring away from the folding piece is used for sealingly pressing the side of the convex ring portion away from the ring groove, and the position where the pressing ring abuts against the convex ring portion and the position where the second convex ring abuts against the ring groove are axially staggered.

2. The lens assembly according to claim 1, wherein: After the sleeve portion and the lens are sealed and assembled, a gap is provided between the outer peripheral surface of the sleeve portion and the inner wall of the lens barrel portion.

3. The lens assembly according to claim 1, wherein: The inner wall of the sleeve portion is provided with a plurality of first convex rings protruding inwardly along the radial direction, and the first convex rings are interference-fitted with the outer wall of the lens.

4. The lens assembly according to claim 1, wherein: An extension ring is provided on the side of the convex ring portion away from the annular groove. The extension ring is coaxially arranged with the sleeve portion. The inner diameter of the extension ring is larger than the inner diameter of the sleeve portion. A guiding slope is provided at the inner wall connection between the extension ring and the sleeve portion.

5. The lens assembly according to claim 4, characterized in that: The extension ring and the annular groove are coaxially arranged.

6. The lens assembly according to claim 5, characterized in that: The flap is detachably connected to the shell via a fastener.

7. The lens assembly according to claim 6, wherein: The extension ring is inserted into the pressing ring.

8. The lens assembly according to claim 6, wherein: The folding piece is provided with a positioning hole, and the inner side of the shell is provided with a positioning column which is sleeved with the positioning hole.

9. A camera, characterized in that: Comprising the lens assembly as described in any one of claims 1-8.

Images