Focusing structure

Abstract

The utility model belongs to the technical field of photographic equipment, and particularly relates to a focusing structure which comprises a shell, a lens assembly and a connecting assembly, the two ends of the shell are open, the shell is hollow, and the inner wall of the shell is provided with internal threads; the lens assembly comprises a lens barrel and a lens. The lens barrel comprises a barrel body and a joint part arranged on the outer wall of the barrel body, the lens is arranged in the barrel body, and the joint part is screwed and matched with the internal thread; the connecting assembly comprises a front shell, a rear shell and at least two connecting rods, the front shell is connected with the rear shell through the connecting rods, the rear shell is connected with the light source, and the front shell and the rear shell are arranged at the two ends of the axis of the shell respectively; when the shell is rotated through external force, the joint part moves along the internal thread, so that the lens cone moves in the axis direction of the lens cone, and the lens is relatively close to or far away from the light source. The focusing structure has the advantages of being smooth in focusing, not prone to jamming, good in dimming effect and the like.

Description

Technical Field

[0001] This application belongs to the technical field of photographic equipment, and particularly relates to a focusing structure. Background Art

[0002] In the field of photography, in order to achieve better lighting and shooting effects, it is necessary to adjust the focal length of the light source. Focus adjustment usually refers to adjusting the distance between the lens and the light source.

[0003] The focusing structure in the prior art includes an inner cylinder and an outer cylinder. A lens and a color filter are provided in the inner cylinder. The outer cylinder is connected to the light source. A groove is longitudinally provided on the inner cylinder. A bead screw is provided in the outer cylinder. The relative axial position change between the inner cylinder and the outer cylinder is realized through the cooperation of the groove on the inner cylinder and the bead screw on the outer cylinder, so that the lens in the inner cylinder can move back and forth as the inner cylinder moves, so as to change the distance between the lens and the light source, and further realize focus adjustment. However, this method requires the user to axially pull the inner cylinder. Since the inner cylinder and the outer cylinder are movably matched, if the axes of the inner cylinder and the outer cylinder are slightly deviated due to force and other reasons, it is easy to cause uneven contact force between multiple bead screws on the outer periphery and the groove, resulting in jamming during pulling or a jerky feel during pulling. In addition, since the inner cylinder and the outer cylinder adopt an axial pulling method, it is difficult for the user to master the strength, and it is easy to have the phenomenon of insufficient moving distance or excessive moving, resulting in poor dimming effect and generally poor use experience. Utility Model Content

[0004] The purpose of this application is to solve the technical problems in the prior art, such as jamming during pulling, a jerky feel during pulling, it is difficult for the user to master the strength, it is easy to have the phenomenon of insufficient moving distance or excessive moving, resulting in poor dimming effect and generally poor use experience.

[0005] This application provides a focusing structure, including:

[0006] A housing, open at both ends and hollow inside, and an internal thread is provided on the inner wall of the housing;

[0007] A lens assembly, including a lens barrel and a lens; the lens barrel includes a barrel body and a joint portion provided on the outer wall of the barrel body, the lens is fixed inside the barrel body, and the joint portion is threadedly engaged with the internal thread;

[0008] A connection assembly, including a front shell, a rear shell and at least two connecting rods, the front shell is fixed to the rear shell through the connecting rods, both ends of the axis of the housing are clamped between the front shell and the rear shell, and the rear shell is connected to the light source;

[0009] Wherein, by externally rotating the housing, the joint portion moves along the internal thread, so that the lens barrel moves along its own axis direction, so that the lens moves relatively closer to or farther from the light source.

[0010] In an exemplary embodiment of the present application, the plurality of engaging portions are arranged at intervals in the circumferential direction of the barrel, and the connecting line of the plurality of engaging portions is the same as the extending locus of the internal thread.

[0011] In an exemplary embodiment of the present application, the lens barrel further includes a protruding portion protruding from the outer wall of the barrel, the extending direction of the protruding portion is consistent with the axial direction of the barrel, and the engaging portion is arranged on the surface of the protruding portion;

[0012] The front shell is provided with a limiting notch, the protruding portion is arranged in the limiting notch, and when the outer shell is rotated by an external force, the engaging portion moves along the internal thread, and the protruding portion slides at the limiting notch.

[0013] In an exemplary embodiment of the present application, the front shell and the rear shell are both annular, the at least two connecting rods are arranged at intervals in the circumferential direction of the front shell and the rear shell, and the connecting rods are arranged between the outer shell and the barrel; the front shell is sleeved outside the barrel.

[0014] In an exemplary embodiment of the present application, an inward concave avoidance groove is provided on the outer side wall of the barrel; when the lens barrel moves in the axial direction, the avoidance groove slides along the outer wall of the connecting rod.

[0015] In an exemplary embodiment of the present application, a convex edge portion is protrudingly provided on the inner wall of the barrel, and the periphery of the lens is arranged on the convex edge portion.

[0016] In an exemplary embodiment of the present application, the focusing structure further includes a limiting frame connected to the inner wall of the barrel, the limiting frame is arranged on the side of the lens away from the convex edge portion, the limiting frame abuts against the surface of the outer edge of the lens, and the limiting frame is fixedly connected to the convex edge portion to clamp the lens between the limiting frame and the convex edge portion.

[0017] In an exemplary embodiment of the present application, a groove extending along the axis of the barrel is opened on the inner wall of the barrel;

[0018] The limiting frame includes a frame body and a connecting portion protruding from the outer edge of the frame body, the connecting portion is embedded in the groove, the connecting portion can slide up and down in the groove to abut the frame body against the surface of the outer edge of the lens, and when the frame body abuts against the surface of the outer edge of the lens, the connecting portion is fixedly connected to the convex edge portion located in the groove.

[0019] In an exemplary embodiment of the present application, the focusing structure further includes a fixing member;

[0020] The connecting portion is provided with a first through hole penetrating up and down along the axis of the cylinder body, and the convex edge portion located at the groove is provided with a second through hole penetrating up and down along the axis of the cylinder body, and the second through hole corresponds to the first through hole;

[0021] Wherein, the fixing member sequentially passes through the first through hole and the second through hole, and is respectively connected to the connecting portion and the convex edge portion to fixedly connect the limiting frame and the convex edge portion.

[0022] In an exemplary embodiment of the present application, the lens is fixed inside the cylinder body and located at the front end of the axis of the cylinder body, and the joint portion is located at the rear end of the axis of the cylinder body.

[0023] In an exemplary embodiment of the present application, the lens includes:

[0024] An outgoing light surface, the outgoing light surface is provided with a plurality of annular microstructures, and the plurality of annular microstructures are sequentially arranged at intervals in the radial direction of the lens;

[0025] An incoming light surface, the incoming light surface is provided with a plurality of honeycomb microstructures.

[0026] The focusing structure of the solution of the present application has at least the following beneficial effects:

[0027] The focusing structure of the present application includes a housing, a lens assembly and a connection assembly. The inner wall of the housing is provided with internal threads; the lens assembly includes a lens barrel and a lens. The lens barrel includes a cylinder body and a joint portion provided on the outer wall of the cylinder body. The joint portion is threadedly engaged with the internal threads; the connection assembly includes a front shell, a rear shell and at least two connecting rods. The front shell is fixed to the rear shell through the connecting rods. The two ends of the axis of the housing are clamped between the front shell and the rear shell. The rear shell is connected to the light source; when the housing is rotated by an external force, the joint portion will move along the extension trajectory of the internal threads, so that the lens barrel moves along its own axis direction, so that the lens approaches or moves away from the light source, thereby realizing focusing. The technical solution of the present application controls the joint portion to slide on the extension path of the internal threads by rotating the housing, so as to control the lens assembly to move away from or close to the light source. The force for rotating the housing acts only in its circumferential direction. Compared with the housing in the focusing structure by the pulling method, the housing in the technical solution of the present application receives a more balanced rotational force and will not get stuck due to uneven force. In addition, in the technical solution of the present application, the internal threads guide the joint portion to move. This setting makes the joint portion move more smoothly during the movement. The user can rotate the housing back and forth during use to continuously adjust the position of the joint portion in the internal threads to accurately adjust the distance between the lens and the light source and ensure the dimming effect.

[0028] Other features and advantages of the present application will become apparent through the following detailed description, or be learned in part through the practice of the present application.

[0029] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the drawings in the following description are only some embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0031] Figure 1 It shows an exploded structural schematic diagram of a housing, a connection component, and a lens component provided by an embodiment of this application.

[0032] Figure 2 It shows a three-dimensional structural schematic diagram of a focusing structure provided by an embodiment of this application from one perspective.

[0033] Figure 3 It shows a three-dimensional structural schematic diagram of a focusing structure provided by an embodiment of this application from another perspective.

[0034] Figure 4 It shows a structural schematic diagram of a lens component after moving at a limiting notch provided by an embodiment of this application.

[0035] Figure 5 It shows a structural schematic diagram of a focusing structure provided by an embodiment of this application from a top-down perspective.

[0036] Figure 6 It shows Figure 5 a structural schematic diagram of a half-section along the A-A' sectional line.

[0037] Figure 7 It shows a sectional structural schematic diagram of a lens carried between a limiting frame and a convex edge portion provided by an embodiment of this application.

[0038] Figure 8 It shows Figure 7 an enlarged structural schematic diagram of a front housing at position B between a lens barrel and a housing in

[0039] Figure 9 It shows Figure 7 an enlarged structural schematic diagram of a rear housing at position C between a lens barrel and a housing in

[0040] Figure 10 It shows a sectional structural schematic diagram of a connecting rod provided by an embodiment of this application between a cylinder and a housing.

[0041] Figure 11The cross-sectional structural schematic diagram of the fixing member connecting the convex edge portion and the connecting portion provided by the embodiment of the present application is shown.

[0042] Figure 12 The structural schematic diagram of the light-emitting surface of the lens provided by the embodiment of the present application is shown.

[0043] Figure 13 The structural schematic diagram of the light-incident surface of the lens provided by the embodiment of the present application is shown.

[0044] Explanation of reference numerals:

[0045] 10, focusing structure; 100, housing; 110, internal thread; 120, rib; 200, lens assembly; 210, lens barrel; 211, barrel body; 2110, protruding portion; 2111, convex edge portion; 2112, groove; 2113, avoidance groove; 212, joint portion; 220, lens; 300, connection assembly; 310, front shell; 311, limiting notch; 312, front shell body; 313, first retaining edge; 320, rear shell; 321, rear shell body; 322, second retaining edge; 323, connection block; 330, connecting rod; 400, limiting frame; 410, frame body; 420, connecting portion; 500, fixing member. Detailed implementation manners

[0046] Now, the exemplary embodiments will be described more comprehensively with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; on the contrary, these embodiments are provided so that this application will be more comprehensive and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art.

[0047] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0048] In the present application, unless otherwise clearly defined and limited, the terms "assembly", "connection" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0049] In addition, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present application.

[0050] Referring to Figures 1 to 3 As shown, an embodiment of the present application provides a focusing structure 10, which includes a housing 100, a lens assembly 200, and a connecting assembly 300. The housing 100 is a cylindrical shell structure with open ends and a hollow interior, and an internal thread 110 is provided on its inner wall. The lens assembly 200 includes a lens barrel 210 and a lens 220. The lens barrel 210 includes a barrel body 211 and a joint portion 212. This joint portion 212 is provided on the outer wall surface of the barrel body 211, and this joint portion 212 is threadedly engaged with the internal thread 110. The barrel body 211 can be fixed within the housing 100 through this joint portion 212. The lens 220 is disposed inside the barrel body 211, and the lens 220 can move along with the barrel body 211. The connecting assembly 300 is disposed between the housing 100 and the lens barrel 210. One end of the connecting assembly 300 is used to connect to a light source so that the focusing structure 10 is fixed to the light source.

[0051] Wherein, when the housing 100 is rotated by an external force, this joint portion 212 can move along the extension path of the internal thread 110, so that the lens barrel 210 moves along its own axis direction, so that the lens 220 moves relatively closer to or farther from the light source, thereby achieving focusing.

[0052] The technical solution of the present application controls the joint portion 212 to slide on the extension path of the internal thread 110 by rotating the housing 100, and then controls the lens assembly 200 to move away from or closer to the light source. The force for rotating the housing 100 acts only in its circumferential direction. Compared with the housing in the focusing structure using the pulling method, the housing 100 in the technical solution of the present application receives a more balanced rotational force and will not cause jamming problems due to uneven force. In addition, in the technical solution of the present application, the internal thread 110 guides the movement of this joint portion 212. This setting makes the movement of the joint portion 212 smoother and more slippery. When the user uses it, the housing 100 can be rotated back and forth to continuously adjust the position of the joint portion 212 in the internal thread 110 to accurately adjust the distance between the lens 220 and the light source and ensure the dimming effect.

[0053] It can be understood that the arrangement range of the internal thread 110 on the inner wall of the housing 100 determines the moving distance of the joint portion 212, and further determines the distance between the lens 220 and the light source. The wider the arrangement range of the internal thread 110 is designed, the longer the moving path of the joint portion 212 on the internal thread 110 is, and the longer the moving distance of the lens barrel 210 in its axial direction is. It has focus adjustment for various distances, increases the focus adjustment effect of the focus adjustment structure 10 at various distances, and improves the user experience.

[0054] In some embodiments of the present application, the arrangement range of the internal thread 110 is equal to the height of the housing 100, so that the moving distance of the joint portion 212 is the longest, the moving distance of the lens barrel 210 in its own axial direction is the farthest, and the adjustable distance of the distance between the lens 220 and the light source is more. It has focus adjustment for various distances, increases the focus adjustment effect of the focus adjustment structure 10 at various distances, and improves the user experience.

[0055] In some embodiments of the present application, referring to Figure 1 , a plurality of joint portions 212 are provided on the outer wall of the cylinder body 211, and the plurality of joint portions 212 are arranged at intervals in the circumferential direction of the cylinder body 211. The plurality of joint portions 212 are all screwed and adapted to the internal thread 110. During the rotation of the housing 100, the plurality of joint portions 212 all slide in the internal thread 110 to control the movement of the lens barrel 210 in its axial direction. In addition, the connection line of the plurality of joint portions 212 can be the same as the extension track of the internal thread 110, ensuring that the plurality of joint portions 212 can move along the same thread section of the internal thread 110. By moving the plurality of joint portions 212 in the same thread section of the internal thread 110, the rotation stability of the housing 100 on the outer surface of the cylinder body 211 can be ensured, and the situation that a joint portion 212 is easily detached from the internal thread 110 can be avoided. The connection stability between the cylinder body 211 and the housing 100 and the movement stability of the cylinder body 211 can be ensured through the plurality of joint portions 212.

[0056] It should be noted that the plurality of joint portions 212 can also be located at different height positions respectively, which can avoid thread slipping at the same thread section, and they can also slide at the remaining thread sections, ensuring the smooth movement of the housing 100.

[0057] In some embodiments of the present application, referring to Figure 1 and Figure 4 as shown, the lens barrel 210 further includes a protruding portion 2110 protruding from the outer wall of the cylinder body 211. There are a plurality of protruding portions 2110, and the plurality of protruding portions 2110 are arranged at intervals in the circumferential direction of the cylinder body 211. The extending direction of the protruding portion 2110 is the same as the axial direction of the cylinder body 211.

[0058] The joint portion 212 is disposed on the surface of the protruding portion 2110, and the number of the protruding portions 2110 corresponds to the number of the joint portions 212. The connection assembly 300 is provided with a limiting notch 311, and the protruding portion 2110 is disposed in the limiting notch 311. When the outer shell 100 is rotated by an external force, the joint portion 212 can move along the internal thread 110. At the same time, the protruding portion 2110 slides at the limiting notch 311. The moving direction of the cylinder 211 in its axial direction can be effectively limited by the limiting notch 311 and the protruding portion 2110.

[0059] For example, the lens barrel 210 includes a cylinder 211 and three protruding portions 2110. The three protruding portions 2110 are sequentially and spaced apart in the circumferential direction of the cylinder 211, and the distance between any two adjacent ones of the three protruding portions 2110 is the same. The joint portions 212 are provided on the outer walls of the three protruding portions 2110, and the connecting line of the joint portions 212 on the three protruding portions 2110 is the same as the extending track of the internal thread 110. Correspondingly, the connection assembly 300 is also provided with three limiting notches 311, and the three limiting notches 311 correspond to the three protruding portions 2110.

[0060] It should be noted that the length of the protruding portion 2110 is less than the height of the cylinder 211 and should be greater than the length of the joint portion 212 to facilitate sliding on the connection assembly 300.

[0061] In some embodiments of the present application, referring to Figure 1 、 Figure 5 and Figure 6 As shown, the connection assembly 300 includes a front shell 310, a rear shell 320 and at least two connecting rods 330. Both the front shell 310 and the rear shell 320 are annular, and the front shell 310 and the rear shell 320 are respectively disposed at opposite ends in the axial direction of the outer shell 100. The connecting rod 330 is disposed between the outer shell 100 and the cylinder 211 for connecting the front shell 310 and the rear shell 320, and at least two connecting rods 330 are circumferentially spaced between the front shell 310 and the rear shell 320.

[0062] In some embodiments of the present application, the connection assembly 300 includes a front shell 310, a rear shell 320 and three connecting rods 330. Using fewer connecting rods 330 to connect the front shell 310 and the rear shell 320 can not only ensure the connection stability of the connection assembly 300, but also reduce the weight of the focusing structure 10.

[0063] The front shell 310 is sleeved on the outside of the cylinder 211, and the front shell 310 is provided with the above-mentioned limiting notch 311. When the outer shell 100 is rotated by an external force, the cylinder 211 will move in its own axial direction along the limiting notch 311 of the front shell 310 to adjust the distance between the lens 220 in the cylinder 211 and the light source.

[0064] In some embodiments of the present application, as shown in Figures 7 to 9 FIG. Figures 7 to 9 , the previous housing 310 includes a front housing body 312 and a first retaining edge 313. The front housing body 312 abuts against the top wall of the outer housing 100. The first retaining edge 313 extends in the axial direction of the outer housing 100 and is inserted into the interior of the outer housing 100. And the previous housing body 312 is detachably connected to one end of the connecting rod 330. The rear housing 320 includes a rear housing body 321 and a second retaining edge 322. The rear housing body 321 abuts against the bottom wall of the outer housing 100. The second retaining edge 322 extends in the axial direction of the outer housing 100 and is inserted into the interior of the outer housing 100. The second retaining edge 322 is disposed opposite to the first retaining edge 313. The rear housing body 321 is detachably connected to the other end of the connecting rod 330. By using the front housing 310, the rear housing 320 and the connecting rod 330, the movement of the outer housing 100 in its radial and axial directions can be restricted, and the outer housing 100 is fixed on the front housing 310, the rear housing 320 and the connecting rod 330, so as to prevent the outer housing 100 from falling off the light source.

[0065] It should be noted that the first retaining edge 313 and the second retaining edge 322 do not affect the extending path of the internal thread 110 inside the outer housing 100. That is, the height of the first retaining edge 313 should be less than the distance from the top wall of the outer housing 100 to the internal thread 110 in a circle close to the top wall; the height of the second retaining edge 322 should be less than the distance from the bottom wall of the outer housing 100 to the internal thread 110 in a circle close to the bottom wall.

[0066] In addition, as shown in Figure 6 FIG. Figure 6 , a first threaded hole penetrating in the axial direction of the outer housing 100 is provided on the front housing body 312. A second threaded hole is provided at one end of the connecting rod 330. The first threaded hole corresponds to the second threaded hole, and the front housing body 312 and the connecting rod 330 are fixed by means of structures such as screws or rivets. Correspondingly, a third threaded hole penetrating in the axial direction of the outer housing 100 is provided on the rear housing body 321. A fourth threaded hole is provided at one end of the connecting rod 330. The third threaded hole corresponds to the fourth threaded hole, and the rear housing body 321 and the connecting rod 330 are fixed by means of structures such as screws or rivets.

[0067] It is worth mentioning that, as shown in Figure 1 and Figure 4 FIG. Figure 1 and FIG. Figure 4 , the above-mentioned limiting notch 311 is provided on the previous housing body 312. The limiting notch 311 and the first threaded hole are spaced apart from each other to prevent the connecting rod 330 from affecting the movement of the cylinder body 211.

[0068] In addition, the rear housing 320 further includes a plurality of connecting blocks 323, and the plurality of connecting blocks 323 are arranged at intervals in the circumferential direction of the rear housing body 321. The rear housing body 321 includes a horizontally extending annular portion and a longitudinally extending neck connected thereto. The connecting block 323 protrudes from the outer wall of the longitudinally extending neck of the rear housing body 321, and the connecting block 323 extends in the radial direction of the rear housing body 321. The connecting block 323 is provided at the bottom of the rear housing body 321 and is used to connect with the light source. The outer housing 100, the connecting component 300, and the lens component 200 are fixed to the light source through the longitudinally extending neck and the plurality of connecting blocks 323.

[0069] In some embodiments of the present application, referring to Figure 10 As shown, in order to prevent the connecting rod 330 from affecting the axial movement of the cylinder body 211, an inwardly recessed avoidance groove 2113 is provided on the outer side wall of the cylinder body 211. A part of the connecting rod 330 is located in the avoidance groove 2113, and there is a distance between the connecting rod 330 and the bottom wall of the avoidance groove 2113. When the lens barrel 210 moves along its own axis direction, the connecting rod 330 can slide in the avoidance groove 2113, avoiding excessive friction between the connecting rod 330 and the cylinder body 211, reducing the jamming phenomenon between the cylinder body 211 and the connecting rod 330, and thus improving the sliding smoothness of the lens barrel 210.

[0070] In some embodiments of the present application, a convex edge portion 2111 protrudes from the inner wall of the cylinder body 211, and the periphery of the lens 220 is arranged on the convex edge portion 2111. The convex edge portion 2111 of the cylinder body 211 is used to fix the lens 220 in the lens barrel 210 so that the lens 220 moves together with the lens barrel 210.

[0071] It can be understood that the lens 220 can be fixed to the convex edge portion 2111 of the cylinder body 211 by fixing methods such as pasting, screws, and rivets.

[0072] In some embodiments of the present application, referring to Figure 11 As shown, the focusing structure 10 further includes an annular limiting frame 400. The limiting frame 400 is connected to the inner wall of the cylinder body 211. The limiting frame 400 is provided on the side of the lens 220 away from the convex edge portion 2111. The limiting frame 400 abuts against the surface of the outer edge of the lens 220, and the limiting frame 400 is fixedly connected to the convex edge portion 2111 to clamp the lens 220 between the limiting frame 400 and the convex edge portion 2111, so that the lens 220 is more firmly fixed in the lens barrel 210.

[0073] In some embodiments of the present application, in order to better fix the limit frame 400 inside the cylinder 211, a groove 2112 extending along the axis of the cylinder 211 is formed on the inner wall of the cylinder 211, and the length of the groove 2112 is less than or equal to the height of the cylinder 211. The limit frame 400 includes a frame body 410 and a connecting portion 420. The frame body 410 abuts against the outer edge of the lens 220, and a connecting portion 420 protrudes from the outer edge of the frame body 410. The connecting portion 420 can enter the groove 2112 through the top of the groove 2112 to realize the connection and cooperation between the limit frame 400 and the cylinder 211. In addition, the connecting portion 420 can slide up and down in the groove 2112 so as to abut the frame body 410 against the surface of the outer edge of the lens 220. When the frame body 410 abuts against the surface of the outer edge of the lens 220, the connecting portion 420 is fixedly connected to the convex edge portion 2111 located in the groove 2112. By connecting the connecting portion 420 and the convex edge portion 2111, while ensuring the light-emitting area of the lens 220, damage to the lens 220 can be avoided.

[0074] It can be understood that the groove 2112 is beneficial to restricting the position of the limit frame 400 and can also guide the moving position of the limit frame 400 inside the cylinder 211.

[0075] In addition, the groove 2112 and the protruding portion 2110 can be designed simultaneously, that is, when forming the cylinder 211, an outward extrusion force is applied to the inner wall to simultaneously form the groove 2112 and the protruding portion 2110. By the scheme of simultaneously forming the groove 2112 and the protruding portion 2110, the design steps of separately designing the groove 2112 / protruding portion 2110 can be reduced, and the production cost can be lowered.

[0076] In some embodiments of the present application, as shown in Figure 11 The focusing structure 10 further includes a fixing member 500. The connecting portion 420 is provided with a first through hole penetrating up and down along the axis of the cylinder 211, and the convex edge portion 2111 located at the groove 2112 is provided with a second through hole penetrating up and down along the axis of the cylinder 211, and the second through hole corresponds to the first through hole. The fixing member 500 sequentially passes through the first through hole and the second through hole to connect and fix the connecting portion 420 and the convex edge portion 2111, thereby fixedly connecting the limit frame 400 and the convex edge portion 2111, and fixing the lens 220 between the limit frame 400 and the convex edge portion 2111. In addition, since the fixing member 500 is provided at the convex edge portion 2111 and the connecting portion 420 inside the groove 2112, it can also prevent the fixing member 500 from being too close to the lens 220 and causing damage to the lens 220.

[0077] In some embodiments of the present application, the lens 220 is fixed within the cylinder 211 and located at the front axial end of the cylinder 211, and the engaging portion 212 is located at the rear axial end of the cylinder 211, so as to prevent the engaging portion 212 from affecting the imaging effect of the lens 220.

[0078] In some embodiments of the present application, the lens 220 includes a light-emitting surface and a light-incident surface. Refer to Figure 12 As shown, the light-emitting surface is provided with a plurality of annular microstructures, and the plurality of annular microstructures are sequentially arranged at intervals in the radial direction of the lens 220. This light-emitting surface can transmit more light and improve the brightness of the light-emitting surface. Refer to Figure 13 As shown, the light-incident surface is provided with a plurality of honeycomb microstructures to play a diffusing role.

[0079] It is worth mentioning that, in order to increase the friction of the outer shell 100, a plurality of ribs 120 are provided on the side wall of the outer shell 100, and the plurality of ribs 120 are sequentially arranged at intervals in the circumferential direction of the outer shell 100.

[0080] In the description of this specification, the description with reference to terms such as "some embodiments" and "exemplarily" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0081] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and the description of the present application should fall within the scope covered by the patent of the present application.

Claims

1. A focusing structure, characterized in that: include: The outer shell is open at both ends and hollow inside, and the inner wall of the outer shell is provided with an internal thread; The lens assembly comprises a lens barrel and a lens; the lens barrel comprises a barrel body and a joint portion arranged on the outer wall of the barrel body, the lens is fixed inside the barrel body, and the joint portion is threadedly adapted to the internal thread; A connecting assembly, comprising a front shell, a rear shell and at least two connecting rods, wherein the front shell is fixed to the rear shell through the connecting rods, two ends of the axis of the shell are clamped between the front shell and the rear shell, and the rear shell is connected to the light source; The housing is rotated by external force, and the engaging portion moves along the internal thread, so that the lens barrel moves along its own axial direction, so that the lens is relatively close to or away from the light source.

2. The focusing structure according to claim 1, characterized in that: The plurality of engagement portions are arranged at intervals in the circumferential direction of the cylinder, and a connecting line of the plurality of engagement portions is the same as an extending track of the internal thread.

3. The focusing structure according to claim 1, characterized in that: The lens barrel further comprises a protruding portion protruding from the outer wall of the barrel, the extending direction of the protruding portion is consistent with the axial direction of the barrel, and the engaging portion is arranged on the surface of the protruding portion; The front shell is provided with a limiting notch, and the protrusion is arranged in the limiting notch. When the outer shell is rotated by an external force, the engaging portion moves along the internal thread, and the protrusion slides at the limiting notch.

4. The focusing structure according to claim 3, characterized in that: The front shell and the rear shell are both annular, the at least two connecting rods are arranged at intervals along the circumference of the front shell and the rear shell, and the connecting rods are arranged between the outer shell and the cylinder; the front shell is sleeved on the outside of the cylinder.

5. The focusing structure according to claim 4, characterized in that: An inwardly concave avoidance groove is provided on the outer side wall of the barrel; when the lens barrel moves in the axial direction, the avoidance groove slides along the outer wall of the connecting rod.

6. The focusing structure according to claim 1, characterized in that: The inner wall of the cylinder is protrudingly provided with a convex edge, and the peripheral edge of the lens is arranged on the convex edge.

7. The focusing structure according to claim 6, characterized in that: The focusing structure also includes a limit frame connected to the inner wall of the barrel, the limit frame is arranged on the side of the lens away from the flange portion, the limit frame abuts against the surface of the outer edge of the lens, and the limit frame is fixedly connected to the flange portion to clamp the lens between the limit frame and the flange portion.

8. The focusing structure according to claim 7, characterized in that: The inner wall of the cylinder is provided with a groove extending along the axis of the cylinder; The limiting frame includes a frame body and a connecting portion protruding from the outer edge of the frame body, the connecting portion is embedded in the groove, and the connecting portion can slide up and down in the groove to abut the frame body against the surface of the outer edge of the lens. When the frame body abuts against the surface of the outer edge of the lens, the connecting portion is fixedly connected to the flange portion located in the groove.

9. The focusing structure according to claim 8, characterized in that: The focusing structure also includes a fixing member; The connecting portion is provided with a first through hole penetrating vertically through the axis of the cylinder, and the convex edge portion located at the groove is provided with a second through hole penetrating vertically through the axis of the cylinder, and the second through hole corresponds to the first through hole; The fixing member passes through the first through hole and the second through hole in sequence, and is connected to the connecting portion and the flange portion respectively, so as to fix the limiting frame and the flange portion.

10. The focusing structure according to claim 1, characterized in that: The lens is fixed in the barrel and is located at the axial front end of the barrel, and the engaging portion is located at the axial rear end of the barrel.

11. The focusing structure according to claim 10, characterized in that: The lens comprises: A light emitting surface, wherein the light emitting surface is provided with a plurality of annular microstructures, and the plurality of annular microstructures are sequentially spaced in a radial direction of the lens; The light incident surface is provided with a plurality of honeycomb microstructures.

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