Lens cap assembly and optical apparatus

Abstract

The utility model provides a lens cap assembly and optical equipment. The lens cap assembly comprises a lens cap, a fixed cylinder and a lens ring, the lens ring sleeves the fixed cylinder, the lens ring is used for rotating around the fixed cylinder, the lens cover is connected with the lens ring, and the lens cover is used for being opened or closed relative to the lens ring; an elastic piece is arranged between the lens ring and the fixed barrel, the elastic piece is arranged on the fixed barrel in a sleeving manner, the maximum radial size of the elastic piece in a free state is larger than the inner diameter size of the lens ring, and the elastic piece is used for being deformed to be matched with the inner diameter of the lens ring under the radial extrusion force of the lens ring. According to the lens cover assembly and the optical equipment, the structure is simple, the damping force of the lens ring is easier to control, and the problem of damping failure is not prone to occurring.

Description

Technical Field

[0001] The present application relates to the technical field of optical device components, and in particular to a lens cover assembly and an optical device. Background Art

[0002] As the core component of optical products, the lens needs to be protected with a lens cover when not in use to avoid damage due to bumps.

[0003] Currently, the rotation of the lens cover is mostly achieved through silicone damping. The resistance of silicone damping is difficult to control, and after long-term use, silicone damping is also at risk of wear and failure, resulting in the lens ring being unable to hover at any angle. Summary of the invention

[0004] Based on this, the present application provides a lens cover assembly and an optical device to improve the problems in the prior art that the damping force of the lens ring is difficult to control and the damping is prone to wear and failure.

[0005] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] On the one hand, an embodiment of the present application provides a lens cover assembly, including a lens cover, a fixed tube and a lens ring; the lens ring is sleeved on the fixed tube, the lens ring is used to rotate around the fixed tube, the lens cover is connected to the lens ring, and the lens cover is used to open or close relative to the lens ring; an elastic member is provided between the lens ring and the fixed tube, the elastic member is sleeved on the fixed tube, the maximum radial dimension of the elastic member in a free state is larger than the inner diameter dimension of the lens ring, and the elastic member is used to be deformed by the radial extrusion force of the lens ring to match the inner diameter of the lens ring.

[0007] In one embodiment, the elastic member is an elastic open ring, which includes two first ring ends. The open ring is used to move the two first ring ends toward each other when subjected to radial extrusion force, so as to reduce the radial size of the open ring to match the inner diameter of the lens ring.

[0008] In one embodiment, a mounting boss is circumferentially provided on the outer circumferential wall of the fixing cylinder, and a clamping groove is provided on the mounting boss. The clamping groove is formed by the outer side wall of a part of the mounting boss being recessed inwardly, and the circumferential dimension of the clamping groove matches the elastic deformation amount of the open ring;

[0009] The two ring ends of the open ring are respectively provided with hooks bent in the same direction. The open ring is sleeved on the fixing tube and is located on a side of the mounting boss close to the lens cover. The hooks are inserted into the slots.

[0010] In one embodiment, the elastic member is a stacking ring, which includes two second ring ends, which are staggered and overlapped with each other to form a spiral shape. The stacking ring is used to move the two second ring ends away from each other when subjected to radial extrusion force, so as to reduce the radial size of the stacking ring to match the inner diameter of the lens ring.

[0011] In one embodiment, the lens cover and the lens ring are rotatably connected, and a magnetic attraction portion that cooperates with each other is provided at one end of the lens cover and the lens ring away from the connection point, and the magnetic attraction portion is used to close the lens cover relative to the lens ring through magnetic attraction.

[0012] In one of the embodiments, the edge of the lens cover is provided with a protruding opening portion, the lens ring is provided with a matching portion corresponding thereto, and the magnetic attraction portion is respectively installed on the opening portion and the matching portion.

[0013] In one of the embodiments, a buffer pad is provided on a surface of the matching portion close to the lens cover, and the buffer pad is provided protruding from the surface of the matching portion.

[0014] In one embodiment, the lens cover and the lens ring are rotatably connected via a rotating shaft, and the rotating shaft is a damping shaft.

[0015] In one of the embodiments, the inner side wall of the lens ring is provided with a wear-resistant portion along the circumferential direction, and the wear-resistant portion is used to directly contact with the elastic member.

[0016] On the other hand, an embodiment of the present application provides an optical device, including a lens barrel and a lens cover assembly as described above, wherein the lens cover assembly is used to open or close an open end of the lens barrel.

[0017] The present application has at least the following beneficial effects: the lens cover assembly provided in the embodiment of the present application has an elastic member disposed between the lens ring and the fixed tube, the maximum radial dimension of the elastic member in the free state is greater than the inner diameter dimension of the lens ring, when the lens ring and the fixed tube are assembled, the lens ring applies a radial extrusion force to the elastic member so that the elastic member contracts radially to match the inner diameter of the lens ring, at this time, since the elastic member contracts due to the extrusion force, it can always keep in contact with the inner wall of the lens ring, so that when the lens ring rotates relative to the fixed tube, it can apply friction resistance to the lens ring. The damping force is provided by the elastic force of the elastic member, which is easier to control, and when the lens ring is worn, the extrusion force on the elastic member becomes smaller, but it is still affected by the extrusion force of the lens ring and can always keep in contact with the inner wall of the lens ring, therefore, the elastic member of the present application can provide reliable damping force to the lens ring, reducing the occurrence of the problem that the lens ring cannot be suspended at any angle due to damping failure. The optical device provided in the embodiment of the present application includes the above-mentioned lens cover assembly, so it also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the lens cover assembly of an embodiment of the present application.

[0019] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the lens cover assembly.

[0020] Figure 3 for Figure 1 A schematic cross-sectional structural diagram of a lens cover assembly.

[0021] Figure 4 It is a schematic cross-sectional structural diagram of the fixing tube according to an embodiment of the present application.

[0022] Figure 5 It is a schematic diagram of the structure of the stacked ring according to an embodiment of the present application.

[0023] The meanings of the symbols in the accompanying drawings are as follows:

[0024] 1. Lens cover; 11. Opening part; 2. Fixing tube; 21. Abutting flange; 22. Mounting boss; 23. Slot; 3. Lens ring; 31. Matching part; 32. Magnetic part; 4. Pressing ring; 5. Rotating shaft; 6. Open ring; 61. First ring end; 62. Hook; 7. Overlapping ring; 71. Second ring end. DETAILED DESCRIPTION

[0025] The technical solution of the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] The optical device of the embodiment of the present application includes a lens barrel (not shown) and a lens cover assembly arranged on the lens barrel. The lens cover assembly is fixedly connected to the lens barrel and is used to open or close the open end of the lens barrel to protect the lens assembly in the lens barrel. The optical device can be, for example, a thermal imager.

[0030] like Figure 1 and Figure 2 As shown, the lens cover assembly includes a lens cover 1, a fixing tube 2 and a lens ring 3. The fixing tube 2 is detachably connected to the lens barrel at one end away from the lens cover 1, for example, by means of threads.

[0031] The lens ring 3 is sleeved on the fixed tube 2, and the lens ring 3 is used to rotate around the fixed tube 2. The lens cover 1 is rotatably connected to the lens ring 3 and is used to open or close relative to the lens ring 3. An elastic member is provided between the lens ring 3 and the fixed tube 2, and the elastic member is sleeved on the fixed tube 2. The maximum radial dimension of the elastic member in a free state is greater than the inner diameter of the lens ring 3. The elastic member is used to be deformed by the radial extrusion force of the lens ring 3 to match the inner diameter of the lens ring 3.

[0032] Specifically, Figure 2 and Figure 3As shown, in this embodiment, a contact flange 21 is provided at one end of the fixed barrel 2 close to the lens cover 1, and the lens ring 3 is sleeved outside the fixed barrel 2, and a side surface of the lens ring 3 close to the lens cover 1 is in contact with a side surface of the contact flange 21 away from the lens cover 1. The contact flange 21 is used to limit the position of the lens ring 3, and the lens ring 3 can rotate freely around the outer wall of the fixed barrel 2.

[0033] like Figure 2 and Figure 4 As shown, a mounting boss 22 is provided in the middle of the outer peripheral wall of the fixed tube 2 of this embodiment, and the space above the mounting boss 22 (the space on the side of the mounting boss 22 close to the lens cover 1) forms a mounting position for installing the elastic member, and a lens ring 3 is provided on the outside of the elastic member.

[0034] like Figure 2 As shown, in some embodiments, the elastic member can be, for example, an elastic open ring 6, that is, an unclosed annular member. The open ring 6 includes two first ring ends 61, and the open ring 6 is used to move the two first ring ends 61 in a direction close to each other when subjected to radial extrusion force, so as to reduce the radial size of the open ring 6 and match the inner diameter of the lens ring 3. In order to facilitate the positioning of the elastic member when it is deformed, hooks 62 bent in the same direction can be respectively provided on the two ring ends of the open ring 6, and the open ring 6 is sleeved on the mounting boss 22 of the fixed cylinder 2. Correspondingly, a clamping groove 23 is provided on the mounting boss 22, and the clamping groove 23 is formed by the outer side wall of a part of the mounting boss 22 being recessed inwardly, and the circumferential size of the clamping groove 23 matches the elastic deformation amount of the open ring 6 (that is, the circumferential size of the clamping groove 23 can meet the requirement that the clamping hook 62 can freely stretch and move in the clamping groove 23 when the elastic member is deformed). The overall shape of the open ring 6 after closing can be circular or elliptical. When it is circular, the diameter of the elastic member needs to be larger than the inner diameter of the lens ring 3 and the elastic member in the free state. When it is elliptical, the diameter of its major radius needs to be larger than the inner diameter of the lens ring 3 and the elastic member in the fit. Since the open ring 6 is a non-closed ring, it has a certain amount of expansion and contraction. When it is subjected to radial extrusion force, it will deform and contract, and its elastic force provides damping force.

[0035] Or, if Figure 5As shown, in some other embodiments, the elastic member is a stacked ring 7, which includes two second ring ends 71, which are arranged to overlap each other in an interlaced manner to form a spiral shape. The stacked ring 7 is used to move the two second ring ends 71 ​​away from each other when subjected to radial extrusion force, so as to reduce the radial size of the stacked ring 7 and match the inner diameter of the lens ring 3. The stacked ring 7 is actually a deformation of the open ring 6. The open ring 6 is a ring in which the elastic material is not completely enclosed to form a full ring when enclosed to form a ring, while the stacked ring 7 is a ring in which the length of the elastic material exceeds the length of a full ring when the elastic material is enclosed to form a ring, so that the two second ring ends 71 ​​have a cross-overlapping portion, and the overlapping portion can be arranged to overlap inside and outside, or can be arranged to overlap up and down along the axial direction. When the stacked ring 7 is subjected to radial extrusion force, the two second ring ends 71 ​​move in the circumferential direction away from each other, so that the stacked ring 7 shrinks and the radial size becomes smaller. The lens cover 1 and the lens ring 3 are rotatably connected via a rotating shaft 5. The rotating shaft 5 is arranged along the tangent direction of the large surfaces of the lens cover 1 and the lens ring 3. The lens cover 1 rotates around the rotating shaft 5 to open or close relative to the lens ring 3. In order to enable the lens cover 1 to be opened to any angle, a damping rotating shaft 5 can be used to provide a damping force for the lens cover 1. The damping rotating shaft 5 is an existing product and will not be described in detail here.

[0036] In order to facilitate the opening and closing of the lens cover 1 and the lens ring 3, an opening portion 11 and a matching portion 31 may be provided at one end of the lens cover 1 and the lens ring 3 away from the rotating shaft 5. The lens cover 1 includes a cover body and an opening portion 11 provided at the edge of the cover body. The opening portion 11 is provided protruding from the edge of the cover body, so as to facilitate the application of force to the cover body to open or close the lens optical path. The matching portion 31 is provided on the lens ring 3 accordingly. The conventional lens cover 1 and the lens ring 3 often use a buckle or interference fit method to achieve the closing of the lens cover 1. This method is inconvenient in operation. When opening, a certain force needs to be applied to complete the opening of the lens cover 1. At the same time, the effect of closing the lens cover 1 cannot be guaranteed, and there may be problems such as loose engagement. In order to avoid the occurrence of the above problems, the present embodiment adopts a magnetic attraction method to close the lens cover 1. In the present embodiment, a magnetic attraction portion 32 used to cooperate with each other is provided at one end of the lens cover 1 and the lens ring 3 away from the rotating shaft 5. The magnetic attraction portion 32 is used to close the lens cover 1 relative to the lens ring 3 by the attraction of magnetic force. The magnetic attraction part 32 can be respectively arranged on the opening part 11 and the matching part 31. The magnetic attraction part 32 arranged on the opening part 11 can be made of a magnetic material such as a magnet, and the magnetic attraction part 32 arranged on the matching part 31 can be made of a magnetic material, such as a steel material, and vice versa. Of course, the magnetic attraction parts 32 arranged on the opening part 11 and the matching part 31 can also be made of magnetic materials. As long as they can achieve mutual attraction, there are no excessive restrictions on the specific implementation method. The magnetic closing method is very convenient to operate, and there will be no problem of loose closure.

[0037] In order to reduce the impact force between the lens cover 1 and the lens ring 3 when the lens cover 1 is closed, a buffer pad (not shown) can also be provided, and the buffer pad can be provided on the surface of the matching portion 31 close to the lens cover 1, and the buffer pad is provided slightly higher than the surface of the matching portion 31. The buffer pad can be made of soft materials such as soft rubber and silicone.

[0038] In order to enhance the wear resistance of the lens ring 3 and extend its service life, a wear-resistant portion may be provided on the inner side wall of the lens ring 3, and the wear-resistant portion is used to directly contact the elastic member. For example, a whole annular groove or multiple arc grooves may be provided along the circumferential direction at the contact position between the lens ring 3 and the elastic member, and the wear-resistant portion is provided in the groove. The wear-resistant portion is made of a wear-resistant material, such as rubber or polyurethane.

[0039] To facilitate the installation and use of the lens ring 3, a pressure ring 4 can be provided on the side of the lens ring 3 away from the lens cover 1. The pressure ring 4 is sleeved on the fixing tube 2 and fixedly connected to the fixing tube 2 to prevent the lens ring 3 from being displaced in the radial direction.

[0040] The lens cover assembly and optical device provided in the embodiments of the present application have a simple structure and high reliability, and are not prone to the problem of lens ring damping failure due to wear. At the same time, the lens cover is relatively simple to open and close, making it more convenient for users to use.

[0041] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0042] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A lens cover assembly, characterized in that: The invention comprises a lens cover (1), a fixing tube (2) and a lens ring (3); the lens ring (3) is sleeved on the fixing tube (2), the lens ring (3) is used to rotate around the fixing tube (2), the lens cover (1) is connected to the lens ring (3), and the lens cover (1) is used to be opened or closed relative to the lens ring (3); an elastic member is provided between the lens ring (3) and the fixing tube (2), the elastic member is sleeved on the fixing tube (2), the maximum radial dimension of the elastic member in a free state is greater than the inner diameter dimension of the lens ring (3), and the elastic member is used to be deformed by the radial extrusion force of the lens ring (3) to match the inner diameter of the lens ring (3).

2. The lens cover assembly according to claim 1, wherein: The elastic member is an elastic open ring (6), and the open ring (6) includes two first ring ends (61). When the open ring (6) is subjected to radial extrusion force, the two first ring ends (61) are moved towards each other to reduce the radial size of the open ring (6) so as to match the inner diameter of the lens ring (3).

3. The lens cover assembly according to claim 2, wherein: A mounting boss (22) is circumferentially provided on the outer peripheral wall of the fixing cylinder (2), and a clamping groove (23) is provided on the mounting boss (22). The clamping groove (23) is formed by a portion of the outer peripheral wall of the mounting boss (22) being recessed inwardly, and the circumferential dimension of the clamping groove (23) matches the elastic deformation amount of the open ring (6); The two ring ends of the open ring (6) are respectively provided with hooks (62) bent in the same direction. The open ring (6) is sleeved on the fixed tube (2) and is located on a side of the mounting boss (22) close to the lens cover (1). The hooks (62) are inserted into the slots (23).

4. The lens cover assembly according to claim 1, wherein: The elastic member is a stacked ring (7), and the stacked ring (7) includes two second ring ends (71). The two second ring ends (71) are arranged to overlap each other in an interlaced manner to form a spiral shape. When the stacked ring (7) is subjected to a radial extrusion force, the two second ring ends (71) move in a direction away from each other, so as to reduce the radial size of the stacked ring (7) and match the inner diameter of the lens ring (3).

5. The lens cover assembly according to claim 1, wherein: The lens cover (1) and the lens ring (3) are rotatably connected, and a magnetic attraction portion (32) for use with each other is provided at one end of the lens cover (1) and the lens ring (3) away from the connection point, and the magnetic attraction portion (32) is used to close the lens cover (1) relative to the lens ring (3) through the attraction of magnetic force.

6. The lens cover assembly according to claim 5, wherein: The edge of the lens cover (1) is provided with a protruding opening portion (11), the lens ring (3) is provided with a matching portion (31) corresponding thereto, and the magnetic attraction portion (32) is respectively mounted on the opening portion (11) and the matching portion (31).

7. The lens cover assembly according to claim 6, wherein: A buffer pad is provided on the surface of the matching portion (31) on a side close to the lens cover (1), and the buffer pad is arranged to protrude from the surface of the matching portion (31).

8. The lens cover assembly according to claim 1, wherein: The lens cover (1) and the lens ring (3) are rotatably connected via a rotating shaft (5), and the rotating shaft (5) is a damping shaft.

9. The lens cover assembly according to claim 1, wherein: The inner side wall of the lens ring (3) is provided with a wear-resistant portion along the circumferential direction, and the wear-resistant portion is used to directly contact the elastic member.

10. An optical device, characterized in that: The invention comprises a lens barrel and a lens cover assembly as claimed in any one of claims 1 to 9, wherein the lens cover assembly is used to open or close the opening end of the lens barrel.

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