Lens assembly, lens, and image pickup apparatus
By designing a combination of skeleton and rolling structural parts in the lens assembly, the abutment part and extrusion structure ensure that the rolling parts always roll during the focus process, solving the problem of stuck in the lens focus design and improving focus accuracy and efficiency.
Patent Information
- Application Number
- CN202421237365.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing lens focus design can easily cause the focus group to get stuck and affect the focus accuracy.
A lens assembly is designed, including a skeleton and a focus group, with contacts provided at both ends of the skeleton, the rolling structure member moves along the optical axial direction, and a rolling contact between the rolling member and the guide rail, and ensures that it is through the extrusion structure and the limit guide groove. The scroller is always in a rolling state during focus to avoid getting stuck.
Improves the accuracy and efficiency of focus, ensures that the rolling parts will not fall off the rail, avoids jamming, and enhances the stability and accuracy of focus.
Smart Images
Figure CN222365170U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of lens technology, and in particular to a lens assembly, a lens and an image pickup device. Background Art
[0002] As the imaging industry has increasingly higher requirements for image quality, the optical design of lenses requires the use of multiple lenses for floating focus, and the weight of the focus group increases accordingly. Therefore, the requirements for motor thrust and the smoothness and compactness of the focus structure are also becoming higher and higher.
[0003] Traditional focusing components usually use a rolling element structure to assist in the focusing process. Usually, in order to prevent the rolling element from detaching, a limit end is set at both ends of the rolling path of the rolling element. During the focusing process, if the rolling element abuts against the limit end, it will restrict the rolling of the rolling element, causing the rolling element to get stuck and affecting the focusing process.
[0004] Therefore, it is necessary to improve the existing focusing structure. Utility Model Content
[0005] The present application provides a lens assembly, a lens and an image pickup device, aiming to solve the problem in the prior art that the lens focus design easily causes the focus group to get stuck, resulting in inaccurate focus.
[0006] To achieve the above objectives, the present application proposes a lens assembly, comprising:
[0007] The frame is a cylindrical structure, and abutment parts are respectively arranged at both ends of the frame along the optical axis, and the abutment parts are used to abut and limit the focusing movement of the focusing frame;
[0008] A focus group is movably arranged in the frame, the focus group includes the focus frame and a rolling structure arranged on the side thereof; the rolling structure includes a first guide rail and a rolling member; the two ends of the first guide rail are fixed between the two ends of the frame, and the rolling member includes at least two rolling members spaced apart along the optical axis; the focus frame moves along the first guide rail and forms a rolling contact with the first guide rail through the rolling member; the side of the focus frame is provided with limited end at both ends thereof corresponding to the rolling path of each rolling member;
[0009] Among them, the distance between the focusing frame and the abutting parts at both ends is an equal focusing distance, the distance between the rolling element and the limiting ends at both ends is an equal rolling distance, and the rolling distance is greater than the focusing distance.
[0010] In some embodiments, the rolling structure also includes a pressing piece opposite to the focus frame; one end of the pressing piece is rotatably connected to the focus frame along the optical axis, and an extrusion structure is arranged between the other end and the focus frame, and the rolling piece is also arranged between the first guide rail and the pressing piece;
[0011] Wherein, the extrusion structure is used to drive the pressing member to rotate around one end thereof toward the focusing frame, so that the rolling member is pressed tightly against the first guide rail.
[0012] In some embodiments, the pressing member is provided with limiting guide grooves corresponding to the rolling member along the optical axis, and the limiting guide grooves are used to guide and limit the movement of the rolling member.
[0013] In some embodiments, the extrusion structure includes an adjusting member and an elastic member, the adjusting member is movably disposed on the focusing frame, the other end of the pressing member passes through the adjusting member, and the elastic member abuts between the free end of the adjusting member and the pressing member.
[0014] In some embodiments, the adjusting member is a screw, the elastic member is a compression spring, the adjusting member is threadedly connected to the focusing frame, and the compression spring abuts between the pressing member and the nut of the screw.
[0015] In some embodiments, the first guide rail includes a first guide shaft and a second guide shaft arranged in parallel and spaced apart, and the two ends of the first guide shaft and the second guide shaft are respectively connected by bushings; and the setting interval between the first guide shaft and the second guide shaft can satisfy that the rolling element is limited to rolling on opposite sides of the first guide rail.
[0016] In some embodiments, a second guide rail is provided on the side of the focusing frame corresponding to the first guide rail, and the second guide rail includes a third guide shaft and a fourth guide shaft arranged in parallel and spaced apart; the rolling element close to the side of the focusing frame is squeezed and limited between the third guide shaft and the fourth guide shaft at the same time.
[0017] In some embodiments, it further includes a limiting sleeve slidably disposed on the first guide shaft and the second guide shaft, the limiting sleeve includes a sleeve body, and a first sliding groove corresponding to the first guide shaft and a second sliding groove corresponding to the second guide shaft are opened on opposite sides of the sleeve body, and the limiting sleeve is limited between the first guide shaft and the second guide shaft; and
[0018] The limiting sleeve is provided with accommodating holes on both sides adjacent to the slide groove, and each of the accommodating holes is connected to the first guide shaft and the second guide shaft. The rolling element is arranged corresponding to each accommodating hole and is partially exposed outside the accommodating hole.
[0019] The present application also provides a lens, which includes the lens assembly as described above.
[0020] The present application also provides an image pickup device, which includes a camera body and the lens as described above, wherein the lens is detachably connected to the camera body.
[0021] The technical solution of the present application proposes a lens assembly, a lens and an image pickup device. The lens assembly includes a frame and a focus group; the technical solution of the present application, after the focus group and the frame are assembled, based on the above structural arrangement, the focus group can move along the first guide rail to realize the focusing function, wherein a rolling member is arranged between the focus frame and the first guide rail, so that a rolling contact is formed between the focus frame and the first guide rail, which can greatly reduce the friction of the focus frame during the movement process, improve the focusing accuracy and efficiency, further set a limited end on the focus frame and a contact portion on the frame, and limit the rolling distance of the rolling member to be greater than the focusing distance of the focus frame, so that no matter how the focus frame moves for focusing, the rolling member inside it will never contact the limited ends at the corresponding two ends, thereby ensuring that the rolling member is limited between the focus frame and the first guide rail and will not be separated, and on the other hand, it can ensure that the rolling member is always in a rolling state during the focusing process, and will not cause a stuck phenomenon, thereby improving the focusing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0023] Figure 1 This is a structural schematic diagram of a lens assembly according to an embodiment of the present application;
[0024] Figure 2 This is a schematic diagram of the assembly structure of a focus group according to an embodiment of the present application;
[0025] Figure 3 This is a schematic diagram of the decomposed structure of a focus group according to an embodiment of the present application;
[0026] Figure 4 This is a schematic diagram of the structure of a focus frame according to an embodiment of the present application;
[0027] Figure 5 This is a schematic structural diagram of a pressing part according to an embodiment of the present application;
[0028] Figure 6 This is a schematic structural diagram of a limit sleeve according to an embodiment of the present application;
[0029] Figure 7 This is a schematic structural diagram of a shaft sleeve according to an embodiment of the present application. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0031] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0032] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.
[0033] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0034] See also Figure 1As shown, the present application proposes a lens assembly 100. The lens assembly 100 mainly consists of two parts: a skeleton 1 and a focus group 2. The skeleton 1 is a cylindrical structure with a stable supporting function. Abutment parts are respectively arranged at both ends of the skeleton 1 along the optical axis, and the abutment parts are used to abut and limit the focus movement of the focus frame 21, thereby ensuring that the focusing process is carried out within a safe and controllable range. The abutment part 1-a and the abutment part 1-b shown in the figure can respectively limit the two extreme distances of the focus movement of the focus frame along the optical axis. The focus group 2 is movably arranged in the skeleton 1, and the focus group 2 includes the focus frame 21 and a rolling structure 22 arranged on its side; the focus frame 21 is the main component that supports the lens, and is responsible for changing the relative position of the lens during the movement, thereby realizing the adjustment of the focal length. The rolling structure 22 is used to assist the movement of the focus frame 21 relative to the skeleton 1.
[0035] The rolling structure 22 includes a first guide rail 23 and a rolling member 24; the two ends of the first guide rail 23 are fixed between the two ends of the frame 1; the focus frame 21 moves along the first guide rail 23 and forms a rolling contact with the first guide rail 23 through the rolling member 24; the side of the focus frame 21 is provided with limited end at both ends thereof corresponding to the rolling path of the rolling member. In this way, the first guide rail 23 provides a precise guide for the movement of the focus frame 21, and the setting of the rolling member 24 can greatly reduce the friction of the focus frame 21 during the movement, thereby improving the accuracy, efficiency and stability of focusing.
[0036] It can be understood that the focus group 2 in the present application has been assembled before being installed on the frame 1, that is, before the focus group 2 is installed on the frame 1, the focus frame 21 squeezes the rolling element 24 to fit the first guide rail 23. In this way, when the focus frame 21 moves relative to the first guide rail 23 without being restricted by the abutment portion, in order to prevent the rolling element 24 from leaving the space enclosed between the focus frame 21 and the first guide rail 23, the corresponding rolling element 24 is provided with limit ends at both ends thereof.
[0037] Furthermore, a plurality of rolling elements 24 are arranged at intervals along the optical axis, and corresponding to each rolling element 24, the focus frame is provided with limited end at both ends of each rolling element 24. Figure 1 and Figure 4 As shown, when two rolling elements 24 are provided, a limit end 21 - a , a limit end 21 - b and a limit end 21 - c are provided at intervals.
[0038] Furthermore, the movement of the rolling element 24 and the movement of the focus frame 21 after installation are designed. This includes: defining the distance between the focus frame 21 and the abutting parts at both ends as an equal focus distance, and the distance between each rolling element 24 and the corresponding limit ends at both ends as an equal rolling distance, and the rolling distance is greater than the focus distance. In this way, after the focus group 2 is installed on the skeleton 1, no matter how the focus frame 21 is moved for focusing, the rolling element 24 therein will never contact the corresponding limit ends at both ends. This ensures that the rolling element 24 is limited between the focus frame 21 and the first guide rail 23 and will not disengage, and on the other hand, it ensures that the rolling element 24 is always in a rolling state during the focusing process, thereby improving the focusing accuracy. Among them, the rolling element 24 is a ball.
[0039] In some embodiments, only two limit ends may be provided, and they are respectively provided at the two ends of the focus frame 21. In this case, the distance between the rolling elements at the two ends and the respective adjacent limit ends is the rolling distance, and the rolling distance is also greater than the focusing distance of the focus frame 21. In this way, the same limit effect can be achieved for the rolling element 24, and the situation in which the rolling element 24 contacts the limit ends during the focusing process of the focus frame 21 can be prevented.
[0040] See also Figure 1-Figure 3 As shown, in some embodiments, the rolling structure 22 also includes a pressing piece 25 opposite to the focusing frame 21, one end of the pressing piece 25 is rotatably connected to the focusing frame 21 along the optical axis, and an extrusion structure 30 is arranged between the other end and the focusing frame 21, and the rolling piece 24 is also arranged between the first guide rail 23 and the pressing piece 25; wherein the extrusion structure 30 is used to drive the pressing piece 25 to rotate around one end thereof toward the focusing frame 21, so that the rolling piece 24 is pressed tightly against the first guide rail 23.
[0041] In this embodiment, the rolling structure 22 introduces the pressing piece 25. Through the setting of the above extrusion structure 30, the pressing piece 25 cooperates with the focusing frame 21 to press the rolling piece 24 tightly onto the first guide rail 23, thereby ensuring high assembly accuracy between the rolling piece 24 and the first guide rail 23, and further ensuring the smoothness and accuracy of the movement between the focusing frame 21 and the first guide rail 23.
[0042] The pressing member 25 is connected to the focus frame 21, and clamps the rolling member 24 and the first guide rail 23 therebetween. Because the pressing member 25 moves with the focus frame 21, only when the rolling member 24 is also arranged between the pressing member 25 and the first guide rail 23, can the rolling contact between the pressing member 25 and the first guide rail 23 be further ensured, thereby improving the smoothness of the movement of the pressing member 25. A plurality of rolling members 24 can also be arranged between the pressing member 25 and the first guide rail 23 along the optical axis.
[0043] The pressing member 25 may be a pressing plate, one end of which is rotatably connected to the focus frame 21 via a rotating shaft 251. The rolling member 24 may be symmetrically arranged based on the first guide rail 23. In this way, the layout of arranging multiple rolling members 24 at intervals along the optical axis on each side of the first guide rail 23 enhances the stability of the focus frame 21 during movement and reduces focus deviation caused by vibration or impact.
[0044] See also Figure 2 as well as Figure 5 As shown, in some embodiments, the pressing member 25 is provided with a limiting guide groove 252 corresponding to the rolling member 24 along the optical axis, and the limiting guide groove 252 is used to guide and limit the movement of the rolling member 24. The limiting guide groove 252 improves the stability between the pressing member 25 and the rolling member 24, and its groove wall can play the same role as the limiting end to limit the movement of the rolling member 24.
[0045] See also Figure 2 as well as Figure 3 As shown, in some embodiments, the extrusion structure 30 includes an adjusting member 302 and an elastic member 301, the adjusting member 302 is movably disposed on the focusing frame 21, the other end of the pressing member 25 passes through the adjusting member 302, and the elastic member 301 abuts between the free end of the adjusting member 302 and the pressing member 25.
[0046] The extrusion structure 30 provides a driving force for the relative movement between the focus frame 21 and the pressing member 25 through this structural design, and the design allows the fine adjustment of the distance between the focus frame 21 and the pressing member 25, so that the contact pressure between the rolling member 24 and the first guide rail 23, that is, the pressing force on the rolling member 24, can be easily adjusted to meet different focusing requirements or compensate for the performance degradation caused by wear. For example, when a larger contact pressure is required, the distance between the free end of the adjustment member 302 and the focus frame 21 can be reduced, thereby further compressing the elastic member 301 and increasing the elastic driving force of the elastic member 301.
[0047] In some embodiments, the adjusting member 302 is a screw, the elastic member 301 is a compression spring, the adjusting member 302 is threadedly connected to the focusing frame 21, and the compression spring abuts between the pressing member 25 and the nut of the screw.
[0048] In this embodiment, it is a common and effective design choice to use a screw as the adjusting member 302 and a compression spring as the elastic member 301. By rotating the screw, its position on the focus frame 21 can be easily adjusted, thereby changing the compression amount of the compression spring. The greater the compression amount, the greater the driving force between the focus frame 21 and the pressing member 25. In this way, the contact pressure between the rolling member and the first guide rail 23 can be fine-tuned by adjusting the elastic force of the spring; the greater the contact pressure, the tighter the rolling member is pressed.
[0049] See also Figure 3 As shown, in some embodiments, the first guide rail 23 includes a first guide shaft 231 and a second guide shaft 232 which are arranged in parallel and spaced apart, and the two ends of the first guide shaft 231 and the second guide shaft 232 are respectively connected by a sleeve 27; and the setting interval between the first guide shaft 231 and the second guide shaft 232 can satisfy that the rolling element 24 is limited to the opposite sides of the first guide rail 23 for rolling.
[0050] In this embodiment, the first guide shaft 231 and the second guide shaft 232 are both shaft rod structures. The shaft rods are easy to process and can reduce the preparation cost of the first guide shaft 231. The rigid design of the guide shafts enables the rolling elements to maintain a stable state when pressed against the first guide rail 23.
[0051] Specifically, the first guide shaft 231 and the second guide shaft 232 are connected by the sleeve 27, and the sleeve 27 maintains the parallelism and spacing distance between the two guide shafts, thereby providing a clear rolling path for the rolling element 24 on both sides of the first guide shaft 231 and the second guide shaft 232, preventing the rolling element 24 from offsetting or falling off during the rolling process, thereby improving the reliability and stability of the movement of the focus frame 21.
[0052] Moreover, the shaft sleeve 27 is respectively provided at both ends of the first guide shaft 231 and the second guide shaft 232. In the focusing group 2, the shaft sleeves 27 at both ends can prevent the first guide rail 23 from moving and completely leaving the space enclosed between the pressing piece 25 and the focusing frame 21, so as to facilitate the transportation of the focusing group 2.
[0053] See also Figure 4 As shown, in some embodiments, a second guide rail 29 is provided on the side of the focus frame 21 corresponding to the first guide rail 23, and the second guide rail 29 includes a third guide shaft 291 and a fourth guide shaft 292 that are arranged in parallel and spaced apart; the rolling element 24 close to the side of the focus frame 21 is squeezed and limited between the third guide shaft 291 and the fourth guide shaft 292 at the same time.
[0054] In this embodiment, a second guide rail 29 is provided corresponding to the first guide rail 23, and the second guide rail 29 has the same structure as the first guide rail 23, except that the second guide rail 29 is fixed to the side of the focus frame 21 and moves with the focus frame 21. The third guide shaft 291 and the fourth guide shaft 292 together with the first guide shaft 231 and the second guide shaft 232 can form a more stable rolling frame, reducing the shaking and deviation of the focus frame 21 and the rolling member 24 during the movement.
[0055] See also Figure 3 as well as Figure 6 As shown, in some embodiments, the rolling structure 22 further includes a limiting sleeve 28 slidably disposed on the first guide shaft 231 and the second guide shaft 232 , and the limiting sleeve 28 is used to maintain the spacing distance between the rolling elements on each side.
[0056] The limiting sleeve 28 includes a sleeve body 280, and the sleeve body 280 has a first slide groove 281 corresponding to the first guide shaft 231 and a second slide groove 282 corresponding to the second guide shaft 232 on opposite sides, and the limiting sleeve 28 is limited between the first guide shaft 231 and the second guide shaft 232; and, the limiting sleeve 28 has accommodating holes 283 on the two sides adjacent to the slide groove, and each accommodating hole 283 is connected to the first guide shaft 231 and the second guide shaft 232, and the rolling element 24 is arranged corresponding to each accommodating hole 283 and partially exposed outside the accommodating hole 283.
[0057] In this embodiment, the first slide groove 281 corresponding to the first guide shaft 231 and the second slide groove 282 corresponding to the second guide shaft 232 are respectively provided on opposite sides of the sleeve body 280. The design of these two slide grooves allows the limit sleeve 28 to slide smoothly along the first guide shaft 231 and the second guide shaft 232 without deviation or falling off. And during assembly, it is only necessary to align the limit sleeve 28 with the guide shaft and slide it into place, without the need for complex fixing devices or steps. Similarly, the limit sleeve 28 can also be easily disassembled and replaced during maintenance, reducing maintenance costs and difficulties. At the same time, based on the sliding design of the limit sleeve 28, during the focusing process, the rolling element can push the limit sleeve 28 to move along the first guide shaft 231 and the second guide shaft 232 to prevent the limit sleeve 28 from restricting the rolling of the rolling element.
[0058] It is worth noting that the sleeve 27 in the present application includes a first portion 271 and a second portion 272 that are integrally arranged. Figure 7 As shown. The diameter of the first part 271 is greater than the diameter of the second part 272, and the first part 271 is close to the outside. The first part 271 prevents the first guide rail 23 from moving and completely leaving the space enclosed between the pressing piece 25 and the focusing frame 21. The second part 272 has a limiting function on the movement of the limiting sleeve 28. Usually, the length of the limiting sleeve 28 is precisely calculated so that when the focusing frame 21 moves to the extreme positions at both ends during the focusing process, the limiting sleeve 28 can just or not contact the second part 272 of the shaft sleeve 27; such a design also facilitates the assembly of various components.
[0059] An assembly process of the two-piece focusing group is as follows: first, the limiting sleeve 28 is placed in the first guide rail 23, and after the shaft sleeve 27 is installed, the limiting sleeve 28 is pushed to abut against the second part 272 of the shaft sleeve 27 at one end; then, the rolling member 24 is placed in the receiving hole 283 of the limiting sleeve 28, and the first guide rail 23 with the rolling member 24 is moved between the expanded focusing frame 21 and the pressing member 25; finally, under the action of the extrusion structure 30, the focusing frame 21 and the pressing member 25 simultaneously press the rolling member 24 from both sides to fit the middle first guide rail 23. After the assembly process of the two-piece focusing group is completed, it is necessary to ensure that the first part 271 of the shaft sleeve 27 at the same end is simultaneously abutted against the focusing frame 21 and / or the pressing member 25. In this way, the assembly requirements of the two-piece focusing group can be met, and the focusing operation can be conveniently performed after the frame 1 is installed.
[0060] The present application also provides a lens, which includes the lens assembly 100 described above. The lens adopts all technical solutions of all embodiments of the lens assembly 100 described above, and therefore has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0061] The present application also provides an image pickup device, which includes a camera body and the above lens, wherein the camera body and the lens are detachably connected. In this embodiment, the image pickup device adopts all the technical solutions of all the above lens embodiments, and therefore has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0062] The above description is only a partial or preferred embodiment of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.
Claims
1. A lens assembly, characterized in that: include: The frame is a cylindrical structure, and abutment parts are respectively arranged at both ends of the frame along the optical axis, and the abutment parts are used to abut and limit the focusing movement of the focusing frame; A focus group is movably arranged in the frame, the focus group comprises the focus frame and a rolling structure arranged on the side thereof; the rolling structure comprises a first guide rail and a rolling member at least arranged between the focus frame and the first guide rail; the rolling member is used to form a rolling contact between the focus frame and the first guide rail; the side of the focus frame is provided with limited end at both ends thereof corresponding to the rolling path of the rolling member; Among them, the distance between the focusing frame and the abutting parts at both ends is an equal focusing distance, the distance between the rolling element and the limiting ends at both ends is an equal rolling distance, and the rolling distance is greater than the focusing distance.
2. The lens assembly according to claim 1, characterized in that: The rolling structure also includes a pressing piece opposite to the focus frame; one end of the pressing piece is rotatably connected to the focus frame along the optical axis, and an extrusion structure is arranged between the other end and the focus frame, and the rolling piece is also arranged between the first guide rail and the pressing piece; Wherein, the extrusion structure is used to drive the pressing member to rotate around one end thereof toward the focusing frame, so that the rolling member is pressed tightly against the first guide rail.
3. The lens assembly according to claim 2, characterized in that: The pressing parts are respectively provided with limiting guide grooves corresponding to the rolling parts along the optical axis, and the limiting guide grooves are used to guide and limit the movement of the rolling parts.
4. The lens assembly according to claim 2, characterized in that: The extrusion structure includes an adjusting member and an elastic member. The adjusting member is movably arranged on the focusing frame. The other end of the pressing member passes through the adjusting member, and the elastic member abuts between the free end of the adjusting member and the pressing member.
5. The lens assembly according to claim 4, characterized in that: The adjusting member is a screw, the elastic member is a compression spring, the adjusting member is threadedly connected to the focusing frame, and the compression spring abuts between the pressing member and the nut of the screw.
6. The lens assembly according to any one of claims 2 to 5, characterized in that: The first guide rail includes a first guide shaft and a second guide shaft arranged in parallel and at intervals, and the two ends of the first guide shaft and the second guide shaft are respectively connected by sleeves; and the setting interval between the first guide shaft and the second guide shaft can meet the requirement that the rolling element is limited to the opposite sides of the first guide rail for rolling.
7. The lens assembly according to claim 6, characterized in that: A second guide rail is arranged on the side of the focusing frame corresponding to the first guide rail, and the second guide rail includes a third guide shaft and a fourth guide shaft arranged in parallel and spaced apart; the rolling element close to the side of the focusing frame is squeezed and limited between the third guide shaft and the fourth guide shaft at the same time.
8. The lens assembly according to claim 6, characterized in that: It also includes a limiting sleeve slidably disposed on the first guide shaft and the second guide shaft, the limiting sleeve including a sleeve body, a first sliding groove corresponding to the first guide shaft and a second sliding groove corresponding to the second guide shaft are opened on opposite sides of the sleeve body, and the limiting sleeve is limited between the first guide shaft and the second guide shaft; and The limiting sleeve is provided with accommodating holes on both sides adjacent to the slide groove, and each of the accommodating holes is connected to the first guide shaft and the second guide shaft. The rolling element is arranged corresponding to each accommodating hole and is partially exposed outside the accommodating hole.
9. A lens, characterized in that: The lens comprises a lens assembly as described in any one of claims 1-8.
10. An image pickup device, characterized in that: The image pickup device includes a camera body and the lens as claimed in claim 9, wherein the lens is detachably connected to the camera body.