CN222365171U - Lens assembly, lens and image pickup device - Google Patents

Abstract

The application discloses a lens assembly, a lens and an image pickup device. The lens assembly comprises a framework, a focusing frame and a rolling structural member, wherein the focusing frame is movably arranged in the framework along the optical axis, the rolling structural member is arranged on the side face of the focusing frame, the rolling structural member comprises a first guide rail, rolling members and pressing members, two ends of the first guide rail are arranged on the framework and are in the same direction with the optical axis, the rolling members are at least arranged between the focusing frame and the first guide rail, and the pressing members are used for enabling the rolling members to be kept clamped between the focusing frame and the first guide rail. According to the technical scheme, the pressing piece is arranged, so that the rolling piece is clung to the first guide rail, the assembly precision of the rolling piece is increased, and the focusing precision is improved in the focusing process.

Description

Lens assembly, lens and image pickup apparatus

Technical Field

The present application relates to the field of lens technologies, and in particular, to a lens assembly, a lens, and an image pickup apparatus.

Background

Along with the increasing requirements of the image industry on image quality, the lens needs to use a plurality of lenses for floating focusing in optical design, and the weight of a focusing group is increased, so that the requirements on the motor thrust and the smoothness and the structural compactness of a focusing structure are also higher.

Conventional lens assemblies typically employ a ball bearing structure to assist in achieving the focusing process. Although the friction between the focusing group and the framework can be reduced by adopting the ball structures, the existing focusing mode cannot ensure the arrangement positions of the ball structures and the assembly precision of the balls and the ball guide rail, so that the problem of focusing precision reduction is caused.

Accordingly, there is a need for improvements over existing lens assemblies.

Disclosure of utility model

The application provides a lens assembly, a lens and an image pickup device, and aims to solve the problem that the assembly precision of a rolling element cannot be ensured in a traditional focusing structure, so that the focusing precision is reduced.

In order to achieve the above object, the present application provides a lens assembly. The lens assembly includes:

A skeleton;

The focusing frame is movably arranged in the framework along the optical axis;

The rolling structure comprises a first guide rail, rolling members and pressing members, wherein two ends of the first guide rail are arranged on the framework and are in the same direction with the optical axis, the rolling members are at least arranged between the focusing frame and the first guide rail, and the pressing members are used for enabling the rolling members to be kept clamped between the focusing frame and the first guide rail.

In some embodiments, the pressing member is disposed opposite to the focusing frame, and a surrounding space is formed between the pressing member and the focusing frame, one end of the pressing member is rotationally connected with the focusing frame along the optical axis, and an extrusion structure is disposed between the other end of the pressing member and the focusing frame, and the extrusion structure is used for driving the pressing member to rotate around one end of the pressing member towards the focusing frame;

The first guide rail penetrates through the enclosing space, and the rolling piece is arranged between the focusing frame and the first guide rail and between the first guide rail and the pressing piece.

In some embodiments, the pressing 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.

In some embodiments, the first guide rail comprises a first guide shaft and a second guide shaft which are arranged in parallel at intervals, two ends of the first guide shaft and two ends of the second guide shaft are respectively connected through a shaft sleeve and fixed on the framework, and the arrangement intervals between the first guide shaft and the second guide shaft can meet the condition that the rolling elements are limited on two opposite sides of the first guide rail to roll.

In some embodiments, the device further comprises a limit sleeve arranged on the first guide shaft and the second guide shaft in a sliding way, the limit sleeve comprises a sleeve body, a first chute corresponding to the first guide shaft and a second chute corresponding to the second guide shaft are arranged on two opposite sides of the sleeve body, the limit sleeve is limited between the first guide shaft and the second guide shaft, and

The two sides of the limiting sleeve adjacent to the sliding groove are provided with accommodating holes, each accommodating hole is communicated with the first guide shaft and the second guide shaft, and the rolling piece is arranged corresponding to the accommodating hole and partially exposed out of the accommodating hole.

In some embodiments, the side surface of the focusing frame is provided with a second guide rail corresponding to the first guide rail, the second guide rail comprises a third guide shaft and a fourth guide shaft which are arranged in parallel at intervals, and the rolling element near one side of the focusing frame is simultaneously extruded and limited between the third guide shaft and the fourth guide shaft.

In some embodiments, a first limiting end and a second limiting end are respectively arranged at two ends of the focusing frame corresponding to the moving path of the rolling element, a third limiting end and a fourth limiting end are respectively arranged at two ends of the pressing element corresponding to the moving path of the rolling element, and the first limiting end, the second limiting end, the third limiting end and the fourth limiting end are all used for preventing the enclosing space.

In some embodiments, the lens assembly further comprises a shaft hole structural member, wherein the shaft hole structural member comprises a shaft hole formed in the focusing frame and a shaft rod which is arranged along the optical axial direction and in clearance fit with the shaft hole, the shaft hole is arranged on the other side of the focusing frame opposite to the rolling structural member, and two ends of the shaft rod are arranged on the framework;

The matching length of the shaft hole and the shaft rod in the optical axis direction is smaller than the thickness of the focusing frame.

In some embodiments, one end of the framework is provided with a first limiting plane, the first limiting plane is used for limiting movement of the focusing frame to one end of the framework, the other end of the framework is provided with a second limiting plane, and the second limiting plane is used for limiting movement of the focusing frame to the other end of the framework.

In some embodiments, four corners of the focusing frame are concave and extend along the optical axis to form four L-shaped limiting grooves, four abutting portions are respectively arranged on the inner side of the framework at intervals corresponding to the four L-shaped limiting grooves, the four abutting portions are used for being matched with the four L-shaped limiting grooves to limit movement of the focusing frame in a first direction and a second direction, and the first direction and the second direction are perpendicular to the optical axis.

The application also provides a lens, which comprises the lens component.

The present application also provides an image pickup apparatus including a camera body and a lens as described above, the lens being detachably connected with the camera body.

The application provides a lens assembly, a lens and an image pickup device. The lens assembly comprises a focusing frame and a rolling structural member, wherein the rolling structural member is arranged on the side face of the focusing frame, the rolling structural member comprises a first guide rail, a rolling member and a pressing member, two ends of the first guide rail are arranged on a framework and are in the same direction with the optical axis, the rolling member is at least arranged between the focusing frame and the first guide rail, and the pressing member is used for enabling the rolling member to keep a state clamped between the focusing frame and the first guide rail. According to the technical scheme, the pressing piece is arranged, so that the rolling piece is clung to the first guide rail, the assembly precision of the rolling piece is increased, and the focusing precision is improved in the focusing process.

Drawings

For a clearer description of embodiments of the application or of solutions in the prior art, the drawings that are necessary for the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the application, from which, without the inventive effort, other drawings can be obtained for a person skilled in the art, in which:

FIG. 1 is a schematic cross-sectional view of a lens assembly according to an embodiment of the application;

FIG. 2 is a schematic diagram illustrating an assembly structure of a focusing frame and a rolling structural member according to an embodiment of the present application;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a schematic diagram of the focusing frame in FIG. 2;

FIG. 5 is a schematic view of the pressing member shown in FIG. 2;

FIG. 6 is a schematic view of the stop collar of FIG. 2;

FIG. 7 is a schematic view of the bushing of FIG. 2;

FIG. 8 is a schematic cross-sectional view of a lens assembly according to the present application;

FIG. 9 is a schematic cross-sectional view of the lens assembly of the present application in one end-to-end focus position;

FIG. 10 is a schematic cross-sectional view of the lens assembly of the present application in the other end-most in-focus position.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present application) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

Referring to fig. 1, the present application provides a lens assembly 100, wherein the lens assembly 100 includes a frame 10, a focusing frame 20 and a rolling structural member 30, the focusing frame 20 is movably disposed in the frame 10 along an optical axis, the rolling structural member 30 is disposed at a side surface of the focusing frame 20, and the rolling structural member 30 includes a first guide rail 31, a rolling member 32 and a pressing member 33. The rolling element 32 is at least arranged between the focusing frame 20 and the first guide rail 31, and the pressing element 33 is used for keeping the rolling element 32 clamped between the focusing frame 20 and the first guide rail 31.

In the present disclosure, the skeleton 10 is required to have sufficient strength and stability as a basic structure of the entire lens assembly 100, so as to ensure that the lens assembly 100 can maintain stable performance under various use environments. The focusing frame 20 is a component for carrying a lens, and is movably mounted on the frame 10, and can realize focusing operation of the lens in the moving process of the frame 10 along the optical axis direction.

The lens is a core optical element in the lens assembly 100, and is responsible for focusing light and forming a clear image. The rolling structural member 30 is disposed on a side surface of the focusing frame 20, and is used for constructing rolling contact between the focusing frame 20 and the first guide rail 31 in the focusing process, so that friction resistance in the moving process of the focusing frame 20 is reduced, and focusing efficiency and accuracy are improved.

Specifically, the rolling structural member 30 provided by the application comprises the first guide rail 31, the rolling member 32 and the pressing member 33, and the rolling member 32 can be tightly attached to the first guide rail 31 under the action of the pressing member 33, so that high assembly precision between the rolling member 32 and the first guide rail 31 is ensured, and smoothness and precision of movement between the focusing frame 20 and the first guide rail 31 are further ensured. The first guide rail 31 is a moving guide rail of the rolling member 32, and guides rolling of the rolling member 32. In this way, the focusing frame 20 is in rolling contact with the first guide rail 31 through the rolling element 32, and moves along the first guide rail 31 to drive the lens or the lens group to move so as to realize the focusing function. Further, the rolling members 32 are balls.

As shown in fig. 2 and 3, in some embodiments, one end of the pressing member 33 is rotatably connected to the focusing frame 20 along the optical axis, and an extruding structure 34 is disposed between the other end and the focusing frame 20, and the extruding structure 34 is used for driving the pressing member 33 to rotate around one end thereof toward the focusing frame 20, wherein the first guide rail 31 penetrates through the enclosing space, and the rolling member 32 is disposed between the focusing frame 20 and the first guide rail 31 and between the first guide rail 31 and the pressing member 33. Further, the pressing structure 34 includes an adjusting member 341 and an elastic member 342, the adjusting member 341 is movably disposed on the focusing frame 20, the other end of the pressing member 33 passes through the adjusting member 341, and the elastic member 342 is abutted between the free end of the adjusting member 341 and the pressing member 33.

It will be appreciated that, at the time of assembly, the focusing frame 20 and the rolling structural member 30 are assembled in advance, and then the whole is mounted on the skeleton 10. At this time, based on the connection relationship between the pressing member 33 and the focusing frame 20, the pressing member 33 and the focusing frame 20 always have a trend of moving oppositely under the action of the pressing structure 34, so that the rolling member 32 can be pressed and attached to the first guide rail 31 gradually.

Further, as shown in fig. 1, the rolling elements 32 are disposed along two sides of the first guide rail 31, so that under the effect of pressing the rolling elements 32 by adding the pressing elements 33, rolling contact between the pressing elements 33 and the first guide rail 31 can be further ensured, and smoothness of the pressing elements 33 when following the movement of the focusing frame is improved.

In some embodiments, at least two rolling elements 32 are disposed on each side of the first guide rail 31 at intervals along the optical axis, which enhances stability during movement of the focusing frame 20 and reduces focusing deviation caused by vibration or shock. The pressing member 33 may be a pressing plate, and one end of the pressing plate is rotatably connected to the focusing frame 20 through a rotating shaft 331. The pressing plate is used for pressing one side of the rolling element 32, and is provided with a guiding groove 332 along the optical axis, as shown in fig. 5.

It should be noted that the pressing structure 34 adopts a design that provides a driving force for the opposite movement between the focusing frame 20 and the pressing member 33, and allows fine adjustment of the distance between the focusing frame 20 and the pressing member 33. So as to conveniently adjust the contact pressure between the rolling element 32 and the first guide rail 31, namely the pressing force to the rolling element 32, thereby adapting to different focusing requirements or compensating for performance degradation caused by abrasion. For example, in the case where a large contact pressure is required, the distance between the free end of the adjustment member 341 and the focusing frame 20 may be reduced, thereby further compressing the elastic member 342 and increasing the elastic driving force of the elastic member 342.

Further, the adjusting member 341 is a screw, the elastic member 342 is a compression spring, the adjusting member 341 is screwed with the focusing frame 20, and the compression spring is abutted between the pressing member 33 and a nut of the screw. It is a common and efficient design choice to use screws as the adjustment member 341 and compression springs as the elastic member 342. The position of the focusing frame 20 can be conveniently adjusted by rotating the screw, so that the compression amount of the compression spring is changed, the larger the compression amount is, the larger the driving force between the focusing frame 20 and the pressing piece 33 is, and thus, the fine adjustment of the contact pressure between the rolling piece 32 and the first guide rail 31 can be realized by adjusting the elasticity of the spring, and the larger the contact pressure is, the tighter the rolling piece 32 is pressed.

In some embodiments, when the assembly of the focusing frame 20 and the rolling structural member 30 is completed and the rolling structural member 30 is not assembled on the frame 10, in order to prevent the rolling member 32 from being separated from the enclosure space, the two ends of the focusing frame 20 are respectively provided with a first limiting end 221 and a second limiting end 222 corresponding to the moving path of the rolling member 32, as shown in fig. 4, and the two ends of the pressing member 33 are respectively provided with a third limiting end (not shown in the drawing) and a fourth limiting end (not shown in the drawing) corresponding to the moving path of the rolling member 32. When the pressing plate is provided with the guide groove 332, the third limit end and the fourth limit end can be groove walls at two ends of the guide groove 332.

It should be noted that, after the lens assembly 100 is assembled on the frame 10 and during the movement of the focusing frame 20, the rolling element 32 rolls along the first guide rail 31 along the movement direction of the focusing frame 20, and the rolling element 32 rolls a distance that is half of the movement distance of the focusing frame 20. When the rolling direction of the rolling member 32 is restricted, the contact between the focusing frame 20 and the rolling member 32 becomes sliding contact, and the frictional resistance increases.

When the first limiting end 221, the second limiting end 222, the third limiting end and the fourth limiting end are provided, these limiting ends may become limiting factors for the rolling element 32 to roll during focusing, and may limit the rolling of the rolling element 32, so in the assembly design of the framework 10, the moving process of the focusing frame 20 and the moving process of the rolling element 32 need to be designed, so that the rolling element 32 will not contact with the first limiting end 221 or the second limiting end 222 during focusing when the focusing frame 20 moves to the limiting positions at both ends. The state when the focus frame 20 is moved to the both end limit positions is shown in fig. 9 and 10.

Referring to fig. 3, in some embodiments, the first guide rail 31 includes a first guide shaft 311 and a second guide shaft 312 disposed at a parallel interval, the first guide shaft 311 and the second guide shaft 312 are connected by shaft sleeves 36 at two ends, and the disposed interval between the first guide shaft 311 and the second guide shaft 312 can satisfy that the rolling member 32 is limited between the guide shafts for rolling.

In this embodiment, the first guide shaft 311 and the second guide shaft 312 are both shaft structures, the shaft is simple to process, the manufacturing cost of the first guide shaft 311 can be reduced, and the rigid design of the guide shafts enables the rolling member 32 to maintain a stable state when being pressed and attached to the first guide rail 31.

Specifically, the first guide shaft 311 and the second guide shaft 312 are connected through the shaft sleeve 36, and the shaft sleeve 36 maintains the parallelism and the spacing distance between the two guide shafts, so that a clear rolling path is provided for the rolling element 32 at both sides of the first guide shaft 311 and the second guide shaft 312, the rolling element 32 is prevented from shifting or falling off in the rolling process, and the reliability and the stability of the movement of the focusing frame 20 are improved.

In addition, the shaft sleeves 36 are respectively disposed at two ends of the first guide shaft 311 and the second guide shaft 312, and in the lens assembly 100, the shaft sleeves 36 at two ends can prevent the first guide rail 31 from moving and completely separating from the enclosed space between the pressing member 33 and the focusing frame 20, so as to facilitate the transportation of the lens assembly 100.

Referring to fig. 4, in some embodiments, a second guide rail 21 is disposed on a side surface of the focusing frame 20 corresponding to the first guide rail 31, the second guide rail 21 includes a third guide shaft 211 and a fourth guide shaft 212 disposed in parallel and spaced apart from each other, and when the focusing frame 20 moves toward the pressing member 33, the rolling member 32 near the focusing frame 20 is simultaneously pressed and limited between the third guide shaft 211 and the fourth guide shaft 212.

In the present embodiment, the second rail 21 is provided corresponding to the first rail 31, and the second rail 21 has the same structure as the first rail 31, except that the second rail 21 is fixed to the side surface of the focusing frame 20 to move following the focusing frame 20. Wherein, the third guide shaft 211 and the fourth guide shaft 212 together with the first guide shaft 311 and the second guide shaft 312 can form a more stable rolling frame, and reduce the shaking and deviation of the focusing frame 20 and the rolling member 32 in the moving process.

Referring to fig. 3 and 6, in some embodiments, the rolling structural member 30 further includes a stop collar 35 slidably disposed on the first guide shaft 311 and the second guide shaft 312, and the stop collar 35 is used to limit the initial setting position of the rolling members 32 and maintain the spacing distance between the rolling members 32 on each side of the first guide rail 31.

The stop collar 35 comprises a collar body 350, a first chute 351 corresponding to the first guide shaft 311 and a second chute 352 corresponding to the second guide shaft 312 are arranged on two opposite sides of the collar body 350, the stop collar 35 is clamped between the first guide shaft 311 and the second guide shaft 312, a containing hole 353 communicated with the first guide shaft 311 and the second guide shaft 312 is arranged on two sides of the stop collar 35 adjacent to the chute, the rolling element 32 is arranged corresponding to each containing hole 353, and part of the rolling element 32 is exposed out of the containing hole 353, wherein the width of the containing hole 353 is larger than the diameter of the rolling element 32.

In this embodiment, two opposite sides of the sleeve 350 are respectively provided with a first sliding groove 351 corresponding to the first guide shaft 311 and a second sliding groove 352 corresponding to the second guide shaft 312. The two sliding grooves allow the stop collar 35 to slide smoothly along the first guide shaft 311 and the second guide shaft 312 without being deviated or falling off. And also only need to aim at the guide shaft with stop collar 35 and slide in place when the equipment can, need not complicated fixing device or step, likewise, also can conveniently dismantle and change stop collar 35 when maintaining, reduced maintenance cost and degree of difficulty. Meanwhile, based on the sliding design of the limit sleeve 35, the rolling piece 32 can push the limit sleeve 35 to move along the first guide shaft 311 and the second guide shaft 312 in the focusing process, so that the limit sleeve 35 is prevented from limiting the rolling of the rolling piece 32.

Notably, the sleeve 36 of the present application includes a first portion 361 and a second portion 362 integrally provided, as shown in FIG. 7. The diameter of the first portion 361 is larger than that of the second portion 362, the first portion 361 is close to the outside, the first portion 361 prevents the first guide rail 31 from moving to be completely separated from the enclosed space, and the second portion 362 has a limiting function on the movement of the limiting sleeve 35. Typically, the length of the stop collar 35 is precisely calculated so that the stop collar 35 will be able to just touch or not touch the second portion 362 of the sleeve 36 when the frame 20 is moved to the extreme positions at both ends during focusing, and such a design also facilitates assembly of the components.

The lens assembly 100 is assembled by firstly placing the limiting sleeve 35 in the first guide rail 31, pushing the limiting sleeve 35 to be abutted against the second portion 362 of the one-end shaft sleeve 36 after the shaft sleeve 36 is installed, then placing the rolling element 32 in the accommodating hole 353 of the limiting sleeve 35, moving the first guide rail 31 with the rolling element 32 placed between the expanded focusing frame 20 and the pressing element 33, and finally pressing the rolling element 32 to be attached to the first guide rail 31 from two sides under the action of the pressing structure 34. After the assembly process of the lens assembly 100 is completed, the first portion 361 of the same-end sleeve 36 is guaranteed to be simultaneously abutted against the focusing frame 20 and/or the pressing member 33. Thus, the assembly requirement of the lens assembly 100 can be met, and the focusing operation is convenient after the framework 10 is installed.

In addition, the accommodation hole 353 is a waist-shaped hole, and the length direction of the waist-shaped hole is perpendicular to the length direction of the first rail 31. This makes a certain clearance between the rolling member 32 and the receiving cavity 353 exist during the falling of the focusing frame 20 along the length direction after the lens assembly 100 is mounted on the frame 10, so as to reduce the acting force between the rolling member 32 and the stop collar 35.

Referring to fig. 4 and 8, in some embodiments, the lens assembly 100 further includes a shaft hole structure 40, the shaft hole structure 40 includes a shaft hole 41 formed on the focusing frame 20, and a shaft rod 42 disposed along the optical axis and in clearance fit with the shaft hole 41, the shaft hole 41 is disposed on the other side of the focusing frame 20 opposite to the rolling structure 30, and two ends of the shaft rod 42 are fixed to two ends of the frame 10, wherein a fit length of the shaft hole 41 and the shaft rod 42 in the optical axis is smaller than a thickness of the focusing frame 20.

According to the lens assembly 100 provided by the technical scheme of the application, the two ends of the first guide rail 31 are connected to the two ends of the framework 10, so that the focusing frame 20 is in rolling contact with the first guide rail 31 based on the arranged rolling piece 32 in the focusing process. And it is proposed that a shaft hole member 40 is provided between the focusing frame 20 and the frame 10, and the shaft hole 41 is provided at the other side of the focusing frame 20 opposite to the rolling member 30. In this way, the shaft hole structural member 40 and the rolling structural member 30 are respectively located at two sides of the focusing frame 20, so as to jointly form a moving support system of the focusing frame 20, wherein two ends of the shaft rod 42 are mounted at two ends of the framework 10, thereby ensuring the stability of the shaft rod 42.

It is further proposed that the fitting length of the shaft hole 41 and the shaft lever 42 in the optical axis direction is smaller than the thickness of the focusing frame 20, so that even if sliding friction is generated between the shaft hole 41 and the second guide shaft 312, the contact area of the sliding friction can be reduced because of the short fitting length, thereby reducing the friction resistance. This helps to make the movement of the focus frame 20 smoother, improving the sensitivity and response speed of focusing.

Further, it is proposed that the shaft hole 41 is in clearance fit with the shaft rod 42, so that in the falling process of the focusing frame 20 in the direction perpendicular to the optical axis, an avoidance clearance exists between the shaft hole 41 and the shaft rod 42, so that the focusing frame 20 can be finely adjusted in the direction perpendicular to the optical axis. The design of the shaft hole structural member 40 and the design of the rolling member 32 in the accommodating hole 353 are matched at the same time, so that a certain gap exists for avoiding in the falling process of the focusing frame 20 in the direction vertical to the optical axis, and the stress on the inner member of the focusing frame can be reduced by combining a related limiting structure, the protection of the member is formed, and the stress optimization is completed.

Referring to fig. 8, in some embodiments, the limiting structure may be four L-shaped limiting grooves 25 recessed in four corners of the focusing frame 20 and extending along the optical axis, and four abutting portions 110 disposed on the inner side of the skeleton 10 and corresponding to the four L-shaped limiting grooves 25 at intervals, where the four abutting portions 110 are used to cooperate with the four L-shaped limiting grooves to realize movement limiting of the focusing frame 20 in a first direction and a second direction, and the first direction and the second direction are perpendicular to the optical axis.

It is noted that the four abutting portions 110 are stressed during the falling of the focusing frame 20 in the direction perpendicular to the optical axis. That is, during the falling process of the focusing frame 20 in the direction perpendicular to the optical axis, when the focusing frame 20 contacts the abutting portion 110, the movement stroke of the rolling member 32 in the accommodating hole 353 has a margin, and the movement stroke of the pressing member 33 has a margin, so that the pressing member 33 and the limiting sleeve 35 are less stressed, and only the self weight needs to be considered when the structural strength design of the pressing member 33 and the limiting sleeve 35 is performed, thereby greatly reducing the set volume.

It should be noted that, when the focusing frame 20 falls toward the rolling element 32 pressed by the focusing frame, the first guide rail 31 is fixedly disposed because the focusing frame 20, the rolling element 32 and the first guide rail 31 are pressed by themselves, and thus the first guide rail 31 is stressed.

In some embodiments, one end of the skeleton 10 is provided with a first limiting plane 120, the first limiting plane 120 is used for limiting movement of the focusing frame 20 to one end of the skeleton 10, the other end of the skeleton 10 is provided with a second limiting plane 130, and the second limiting plane 130 is used for limiting movement of the focusing frame 20 to the other end of the skeleton 10.

In this embodiment, the limiting distance of the focusing frame 20 is limited by the first limiting plane 120 and the second limiting plane 130, so that when the focusing frame 20 reaches the limiting position, the rolling element 32 does not roll to contact the first limiting end 221 and the second limiting end 222 of the focusing frame 20, and the third limiting end and the fourth limiting end of the two ends of the pressing element 33, so as to ensure the rolling state of the rolling element 32.

The application also provides a lens comprising the lens assembly 100 as described above. The lens adopts all the technical solutions of all the embodiments of the lens assembly 100, so that the lens assembly at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

The application also provides an image pickup device, which comprises a camera main body and the lens as above, and adopts all the technical schemes of all the embodiments of the lens, so that the image pickup device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. Wherein, the camera lens is detachably connected with the camera body.

The above description of the preferred embodiments of the present application should not be taken as limiting the scope of the application, but rather should be understood to cover all modifications, variations and adaptations of the present application using its general principles and the following detailed description and the accompanying drawings, or the direct/indirect application of the present application to other relevant arts and technologies.

Claims (12)

1. A lens assembly, comprising:

A skeleton;

The focusing frame is movably arranged in the framework along the optical axis;

The rolling structure comprises a first guide rail, rolling members and pressing members, wherein two ends of the first guide rail are arranged on the framework and are in the same direction with the optical axis, the rolling members are at least arranged between the focusing frame and the first guide rail, and the pressing members are used for enabling the rolling members to be kept clamped between the focusing frame and the first guide rail.

2. The lens assembly of claim 1, wherein the pressing member is disposed opposite to the focusing frame, and a surrounding space is formed between the pressing member and the focusing frame, one end of the pressing member is rotationally connected with the focusing frame along the optical axis, and an extrusion structure is disposed between the other end of the pressing member and the focusing frame, and the extrusion structure is used for driving the pressing member to rotate around one end of the pressing member towards the focusing frame;

The first guide rail penetrates through the enclosing space, and the rolling piece is arranged between the focusing frame and the first guide rail and between the first guide rail and the pressing piece.

3. The lens assembly of claim 2, wherein the pressing structure comprises 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 is abutted between the free end of the adjusting member and the pressing member.

4. The lens assembly of claim 2, wherein the first guide rail comprises a first guide shaft and a second guide shaft which are arranged in parallel at intervals, two ends of the first guide shaft and two ends of the second guide shaft are respectively connected through a shaft sleeve and fixed on the framework, and the arrangement intervals between the first guide shaft and the second guide shaft can meet the condition that the rolling elements are limited on two opposite sides of the first guide rail to roll.

5. The lens assembly of claim 4, further comprising a stop collar slidably disposed on the first guide shaft and the second guide shaft, the stop collar comprising a collar body having first and second slide grooves disposed on opposite sides thereof, the stop collar being positioned between the first and second guide shafts, and

The two sides of the limiting sleeve adjacent to the sliding groove are provided with accommodating holes, each accommodating hole is communicated with the first guide shaft and the second guide shaft, and the rolling piece is arranged corresponding to the accommodating hole and partially exposed out of the accommodating hole.

6. The lens assembly according to claim 4, wherein a second guide rail is disposed on a side surface of the focusing frame corresponding to the first guide rail, the second guide rail includes a third guide shaft and a fourth guide shaft disposed at a parallel interval, and the rolling element near one side of the focusing frame is simultaneously pressed and limited between the third guide shaft and the fourth guide shaft.

7. The lens assembly of claim 2, wherein the two ends of the focusing frame are respectively provided with a first limiting end and a second limiting end corresponding to the moving path of the rolling element, the two ends of the pressing element are respectively provided with a third limiting end and a fourth limiting end corresponding to the moving path of the rolling element, and the first limiting end, the second limiting end, the third limiting end and the fourth limiting end are all used for preventing the rolling element from being separated from the enclosing space.

8. The lens assembly of claim 1, further comprising a shaft hole structure, wherein the shaft hole structure comprises a shaft hole formed in the focusing frame and a shaft rod which is in clearance fit with the shaft hole and is arranged along the optical axis, the shaft hole is arranged on the other side of the focusing frame opposite to the rolling structure, and two ends of the shaft rod are arranged on the framework;

The matching length of the shaft hole and the shaft rod in the optical axis direction is smaller than the thickness of the focusing frame.

9. The lens according to claim 1, wherein one end of the skeleton is provided with a first limiting plane, the first limiting plane is used for limiting movement of the focusing frame to one end of the skeleton, the other end of the skeleton is provided with a second limiting plane, and the second limiting plane is used for limiting movement of the focusing frame to the other end of the skeleton.

10. The lens of claim 1, wherein four corners of the focusing frame are concave and are extended along the optical axis to form four L-shaped limiting grooves, four abutting portions are respectively arranged on the inner side of the framework at intervals corresponding to the four L-shaped limiting grooves, the four abutting portions are used for being matched with the four L-shaped limiting grooves to limit movement of the focusing frame in a first direction and a second direction, and the first direction and the second direction are perpendicular to the optical axis.

11. A lens comprising a lens assembly according to any one of claims 1 to 10.

12. An image pickup apparatus, characterized in that the image pickup apparatus comprises a camera body and the lens as claimed in claim 11, the lens being detachably connected to the camera body.