Lens assembly, lens, and image pickup apparatus

Abstract

The utility model discloses a lens assembly. The lens assembly comprises a skeleton, a focusing group, a driving member, a position detector and a controller. Wherein the focusing group is movably arranged in the skeleton along the axial direction of the skeleton, and the focusing group comprises a focusing frame and a lens arranged on the focusing frame; the driving piece is connected with the focusing frame, and the driving piece is used for driving the focusing frame to move in the axial direction; the position detector comprises a linear magnet fixed to the focusing frame and a Hall sensor fixed to the framework, the length direction of the linear magnet is consistent with the axial direction, and the Hall sensor is arranged on the side face adjacent to the linear magnet; the controller is electrically connected with the Hall sensor and the driving part, and the controller controls the output power of the driving part according to signals of the Hall sensor. According to the technical scheme of the utility model, a detection-control feedback mechanism is established, so that the focusing frame can accurately stay at the preset focusing position, and the definition of the image is ensured. In addition, the invention also provides a lens and an image pickup device.

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] In existing lens autofocus systems, voice coil motors are usually used as driving devices, and the position of the focus group is accurately controlled through the position feedback mechanism of the voice coil motor. However, such systems often have certain errors and instabilities, which leads to reduced focus accuracy.

[0003] Therefore, it is necessary to improve the existing technology to improve the focusing accuracy in the focusing system. Utility Model Content

[0004] The present application provides a lens assembly, a lens and an image pickup device, aiming to solve the problem of error in focusing accuracy of a focusing group in the prior art.

[0005] To achieve the above objectives, the present application proposes a lens assembly, comprising:

[0006] skeleton;

[0007] A focus group, movably arranged in the frame along the axial direction of the frame, the focus group comprising a focus frame and a lens arranged on the focus frame;

[0008] A driving member connected to the focusing frame, the driving member being used to drive the focusing frame to move along an axial direction;

[0009] A position detector, comprising a linear magnet fixed to the focusing frame and a Hall sensor fixed to the frame, wherein the length direction of the linear magnet is consistent with the axial direction, and the Hall sensor is disposed adjacent to the linear magnet on its side;

[0010] A controller is electrically connected to the Hall sensor and the driving element, and the controller controls the output power of the driving element according to the signal of the Hall sensor.

[0011] In some embodiments, a magnet mounting structure is provided on the focus frame; the magnet mounting structure comprises:

[0012] An embedding groove is formed on a side surface of the focusing frame for embedding the linear magnet therein;

[0013] A disassembly hole is connected to the embedding groove and is arranged on both sides of the embedding groove. The depth of the disassembly hole is greater than the depth of the embedding groove, and the portion of the disassembly hole deeper than the embedding groove extends toward the bottom of the embedding groove.

[0014] In some embodiments, a sensor mounting structure is provided on the frame; the sensor mounting structure comprises:

[0015] A mounting seat, provided with a card slot, wherein the card slot is used to fix the Hall sensor;

[0016] An avoidance hole is provided on the frame and is used for passing a wire row connected to the Hall sensor so as to connect to the controller.

[0017] In some embodiments, the driving member is a voice coil motor, and the voice coil motor is disposed on the frame;

[0018] The voice coil motor includes a frame and a coil and an electromagnet arranged on the frame, a first positioning portion is arranged at the bottom of the frame and a first locking portion is arranged at the side wall of the frame; the skeleton includes a supporting portion and an annular wall connected to the supporting portion, a second positioning portion is arranged on the supporting portion corresponding to the first positioning portion and a clamping block for clamping the frame is formed on the annular wall, and a second locking portion corresponding to the first locking portion is arranged on the clamping block.

[0019] In some embodiments, the framework includes:

[0020] A first plate body;

[0021] A second plate body connected to one long side of the first plate body, and the second plate body and the first plate body are perpendicular to each other;

[0022] A third plate body, connected to the other long side of the first plate body, and the third plate body is parallel to the second plate body;

[0023] A cover plate, which is disposed on the second plate body and the third plate body and is located on a side opposite to the first plate body;

[0024] Wherein, the first positioning portion is arranged on the first plate body, the second plate body is arranged close to the annular wall and clamped by the clamping block, and the first locking portion is arranged on the second plate body.

[0025] In some embodiments, an axial hole is provided on the peripheral edge of the focusing frame, and a guide shaft is provided on the frame along the axial direction, and the guide shaft passes through the axial hole;

[0026] Wherein, the axial assembly length of the guide shaft and the shaft hole is smaller than the thickness of the focusing frame.

[0027] In some embodiments, at least two connecting blocks are formed on the peripheral edge of the focusing frame, and the at least two connecting blocks are stacked in the axial direction. Each of the connecting blocks is provided with an axial hole of equal size, and each of the axial holes is located on the same center line.

[0028] In some embodiments, the lens assembly further comprises an appearance component, and the appearance component is sleeved on the frame;

[0029] Wherein, the Hall sensor is arranged on the appearance component adjacent to the linear magnet.

[0030] The present application also provides a lens, which includes the lens assembly as described above.

[0031] The present application also provides an image pickup device, which includes a camera body and the lens as described above, wherein the camera body is detachably connected to the lens.

[0032] The technical solution of the present application proposes a lens assembly, a lens and an image pickup device. The lens assembly includes a skeleton, a focus group, a driving member, a position detector and a controller; the technical solution of the present application sets each component based on the above structure, wherein after the driving member and the focus group and other components are set on the skeleton, the driving member can drive the focus group to move, realize focus adjustment, and obtain a clear image. Among them, by setting a position detector to feedback the position of the focus group, when the focus frame moves, the linear magnet will also move accordingly. The Hall sensor is set adjacent to the linear magnet, which can detect the magnetic field change of the linear magnet, thereby converting it into an electrical signal and outputting it to the controller. The controller will control the output power of the driving member according to the signal to achieve control of the movement of the focus frame. Therefore, the technical solution of the present application establishes a detection-control feedback mechanism, which can enable the focus frame to accurately stay at the predetermined focus position, ensure the focus accuracy, and obtain a clear image. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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:

[0034] Figure 1 This is a structural schematic diagram of a lens assembly according to an embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of a magnet installation structure according to an embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of a sensor installation structure according to an embodiment of the present application;

[0037] Figure 4 This is a schematic diagram of the installation structure of a voice coil motor according to an embodiment of the present application;

[0038] Figure 5 It is a schematic diagram of the shaft hole structure of an embodiment of the present application. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] See also Figure 1 As shown, the present application proposes a lens assembly 100. The lens assembly 100 includes a skeleton 10, a focus group 20 and a driving member 30. The skeleton 10, as the basic structure of the entire lens assembly 100, provides installation space for the focus group 20 and other components; the focus group 20 is movably arranged in the skeleton 10 along the axial direction of the skeleton 10, and the focus group 20 includes a focus frame 21 and a lens 22 arranged on the focus frame 21; the focus group 20 is a key part that affects the imaging quality of the lens, and the focus group 20 moves to achieve focus adjustment, so as to obtain a clear image. The driving member 30 is connected to the focus frame 21, and is used to drive the focus frame 21 to move axially.

[0044] Furthermore, the lens assembly 100 proposed in the present application also includes a position detector 40 and a controller (not shown in the drawings); the position detector 40 includes a linear magnet 41 fixed to the focus frame 21 and a Hall sensor 42 fixed to the frame 10, the linear magnet 41 is a rectangular magnet, with its own magnetic field at the upper and lower ends of the magnet, in a specific setting, the length direction of the linear magnet 41 is consistent with the axial direction, and the Hall sensor 42 is arranged on the side of the linear magnet 41; in this way, when the driving member 30 drives the focus group 20 to move, the linear magnet 41 will also move accordingly, and the Hall sensor 42 is arranged adjacent to the linear magnet 41, which can detect the magnetic field change of the linear magnet 41, thereby converting it into an electrical signal output. Furthermore, the present application can accurately detect the position of the focus frame 21 through the position detector 40, providing key position information for automatic focusing. The controller electrically connects the Hall sensor 42 and the driving member 30, and the controller controls the output power of the driving member 30 according to the signal of the Hall sensor 42 to achieve the control of the movement of the focus frame 21. In this way, the focus frame 21 can accurately stay at the predetermined focus position, ensuring the focus accuracy and obtaining a clear image.

[0045] In some embodiments, the rectangular parallelepiped magnet has an outer dimension of 1.8×3×5 mm, so that it forms a linearly varying NS pole with a length of 5 mm.

[0046] In summary, the lens assembly 100 of the technical solution of the present application is formed by combining components such as a skeleton 10, a focus group 20, a driving member 30, a position detector 40 and a controller, so that it has the advantages of fast response speed and high positioning accuracy.

[0047] See also Figure 2 As shown, in some embodiments, a magnet mounting structure 213 is provided on the focus frame 21; the magnet mounting structure 213 includes an embedding groove 214 and a disassembly hole 215; the embedding groove 214 is formed on the side of the focus frame 21 for the linear magnet 41 to be embedded and fixed; the disassembly hole 215 is connected to the embedding groove 214 and is provided on both sides of the embedding groove 214, the depth of the disassembly hole 215 is greater than the depth of the embedding groove 214, and the part of the disassembly hole 215 that is deeper than the embedding groove 214 extends to the bottom of the embedding groove 214.

[0048] In this embodiment, the embedding groove 214 is a groove on the side of the focus frame 21, and the linear magnet 41 can be tightly embedded and fixed in the groove, thereby ensuring a stable connection between the linear magnet 41 and the focus frame 21. A disassembly hole 215 is further provided, which is connected to the embedding groove 214 and is provided on both sides of the embedding groove 214, so that it is helpful for users or maintenance personnel to use appropriate tools or methods to conveniently disassemble the linear magnet 41 embedded in the embedding groove 214 through the disassembly hole 215.

[0049] Furthermore, the depth of the disassembly hole 215 exceeds the embedding groove 214, and the portion deeper than the embedding groove 214 extends toward the bottom of the embedding groove 214, which helps to increase the space between the disassembly hole 215 and the embedding groove 214, providing more convenience and flexibility for the disassembly operation. Exemplarily, the user disassembles the linear magnet 41 in the embedding groove 214 with a finger. After the finger is inserted through the disassembly hole 215, it can be further bent to the bottom of the embedding groove 214, and then the linear magnet 41 is pulled out with force, so that the disassembly process will be smoother.

[0050] See also Figure 3 As shown, in some embodiments, a sensor mounting structure 140 is provided on the skeleton 10; the sensor mounting structure 140 includes a mounting seat 141 and an avoidance hole 142; the mounting seat 141 is provided with a card slot 143, and the card slot 143 is used to fix the Hall sensor; the avoidance hole 142 is opened on the skeleton 10, and is used for the wire row connected to the Hall sensor to pass through to connect to the controller.

[0051] In this embodiment, the mounting seat 141 is the main part of the sensor mounting structure 140 and is used to fix the sensor. A card slot 143 is provided thereon, and the card slot 143 is designed to match the size and shape of the Hall sensor to ensure that the sensor can be stably inserted therein for fixation.

[0052] The avoidance hole 142 is opened for the wire row to pass through. The Hall sensor is connected to the controller or other devices through the wire row, and the wire row passes through the avoidance hole 142, thereby realizing the physical connection between the sensor and the controller. This connection allows the controller to read the sensor data or send a control signal to the sensor to realize the monitoring and control of the entire system. At the same time, the position and size of the avoidance hole 142 need to be precisely designed to ensure that the wire row can pass through smoothly and will not interfere with the overall structure of the skeleton 10, especially the movable focus frame 21.

[0053] See also Figure 4 As shown, in some embodiments, the driving member 30 is a voice coil motor, and the voice coil motor is arranged on the skeleton 10; the voice coil motor includes a frame 31 and a coil 32 and an electromagnet 33 arranged on the frame 31, the bottom of the frame 31 is provided with a first positioning portion 111 and the side wall of the frame 31 is provided with a first locking portion 34; the skeleton 10 includes a supporting portion 110 and an annular wall 120 connected to the supporting portion 110, a second positioning portion (not shown in the drawings) is provided on the supporting portion 110 corresponding to the first positioning portion 111, and a clamping block 112 for clamping the frame 31 is formed on the annular wall 120, and a second locking portion 113 corresponding to the first locking portion 34 is provided on the clamping block 112.

[0054] In this embodiment, the voice coil motor is mainly composed of a frame 31, a coil 32 and an electromagnet 33, which work together to generate the required driving force.

[0055] Among them, the frame 31, as the main structure of the voice coil motor, not only supports the coil 32 and the electromagnet 33, but also ensures the relative position between the two is stable. The first positioning portion 111 at the bottom of the frame 31 corresponds to the second positioning portion on the frame 10, so that the voice coil motor can be accurately aligned when assembled on the frame 10, ensuring the accuracy and stability of the installation. Then, the first locking portion 34 on the side wall of the frame 31 matches the second locking portion 113 on the clamping block 112 of the frame 10, and the voice coil motor is firmly fixed to the frame 10 through the locking mechanism. This not only enhances the connection strength between the voice coil motor and the frame 10, but also prevents loosening or displacement that may occur during use, ensuring the stable operation of the voice coil motor. In addition, the supporting portion 110 of the frame 10 provides a stable support platform for the voice coil motor, and the clamping block 112 on the annular wall 120 further enhances the fixing effect of the voice coil motor through the clamping action. This not only takes into account the installation and fixing requirements of the voice coil motor, but also takes into account the compactness and stability of the overall structure.

[0056] In summary, the voice coil motor in this embodiment can achieve precise cooperation with the frame 10 and secure the voice coil motor on the frame 10, so that the voice coil motor can fully and stably exert its driving function, providing a reliable power source for automatic focusing and precise adjustment of the lens assembly 100.

[0057] See also Figure 4 As shown, in some embodiments, the frame 31 includes a first plate 311, a second plate 313, a third plate 312 and a cover plate 314. The second plate 313 is connected to one long side of the first plate 311, and the second plate 313 and the first plate 311 are perpendicular to each other; the third plate 312 is connected to the other long side of the first plate 311, and the third plate 312 is parallel to the second plate 313; the cover plate 314 is covered on the second plate 313 and the third plate 312, and on the side opposite to the first plate 311. Among them, the first positioning portion 111 is arranged on the first plate 311, the second plate 313 is arranged close to the annular wall 120 and clamped by the clamping block 112, and the first locking portion 34 is arranged on the second plate 313.

[0058] In this embodiment, the first plate 311 is used as the base of the frame 31 to provide stable support for other plates. The first positioning portion 111 is disposed on the first plate 311 to ensure that the voice coil motor and the frame 10 can be accurately positioned to avoid the problem of unstable operation caused by position offset.

[0059] Then, a second plate 313, a third plate 312 and a cover plate 314 are further arranged; this makes the frame 31 present a stable quadrilateral structure, enhances the overall structural strength of the frame 31, and the arranged cover plate 314 also enhances the sealing of the frame 31, preventing the coil 32 and other internal components from being disturbed by the external environment.

[0060] The second plate 313 is arranged close to the annular wall 120 and clamped by the clamping block 112 . The first locking portion 34 is arranged on the second plate 313 and matches the second locking portion 113 on the frame 10 , which further ensures a firm connection between the voice coil motor and the frame 10 .

[0061] In some embodiments, a pin positioning structure is formed between the first positioning portion 111 and the second positioning portion; and a screw locking structure is formed between the first locking portion 34 and the second locking portion 113 .

[0062] In this embodiment, the use of the pin positioning structure makes the positioning of the voice coil motor on the frame 10 more accurate and stable. Through the insertion of the pin, the first positioning portion 111 and the second positioning portion can be closely matched to ensure that the voice coil motor will not be offset or misaligned during the assembly process. This positioning method not only improves the assembly accuracy, but also simplifies the assembly process and improves production efficiency.

[0063] At the same time, the use of the screw locking structure further strengthens the connection strength between the voice coil motor and the frame 10. By tightening the screws, the first locking portion 34 and the second locking portion 113 can be firmly fixed together to prevent the voice coil motor from loosening or falling off during use. This locking method not only ensures the stable operation of the voice coil motor, but also improves the reliability and durability of the entire lens assembly 100.

[0064] Therefore, in this embodiment, the pin positioning structure and the screw locking structure are used in combination to achieve accurate positioning and stable connection of the voice coil motor.

[0065] In some embodiments, a third locking portion (not shown in the drawings) is further provided on the first plate 311, and a fourth locking portion (not shown in the drawings) corresponding to the third locking portion is provided on the supporting portion 110. In this way, a third locking portion and a fourth locking portion may be further provided to further enhance and optimize the connection between the voice coil motor and the frame 10. A screw locking structure may be formed between the third locking portion and the fourth locking portion.

[0066] See also Figure 5As shown, in some embodiments, an axial hole 212 is opened on the peripheral edge of the focusing frame 21, and a guide shaft 130 is axially arranged on the skeleton 10, and the guide shaft 130 passes through the axial hole 212; wherein, the axial assembly length of the guide shaft 130 and the axial hole 212 is less than the thickness of the focusing frame 21.

[0067] In this embodiment, the cooperation between the shaft hole 212 and the guide shaft 130 enables the voice coil motor to guide and limit the focus frame 21 when driving the focus group 20 to move, thereby achieving stable installation and sliding of the focus frame 21 on the skeleton 10.

[0068] It is worth noting that the axial assembly length of the guide shaft 130 and the shaft hole 212 is less than the thickness of the focus frame 21. That is, the shaft hole 212 is not a conventional through hole that goes from one side of the focus frame 21 to the other side. In this assembly method, the contact area between the guide shaft 130 and the shaft hole 212 is small, so that the friction force when the focus frame 21 moves can be reduced, making the movement of the focus frame 21 smoother; at the same time, due to the reduced friction force, the focus frame 21 can reach the predetermined position more quickly and accurately, which helps to improve the movement and response speed of the focus.

[0069] In some embodiments, at least two connecting blocks 211 are formed on the peripheral edge of the focusing frame 21, and at least two connecting blocks 211 are stacked in the axial direction, and each connecting block 211 is provided with an axial hole 212 of equal size, and each axial hole 212 is located on the same center line.

[0070] In this embodiment, by providing shaft holes 212 on at least two connection blocks 211 , each shaft hole 212 cooperates with the guide shaft 130 to reduce the contact surface.

[0071] Among them, at least two connecting blocks 211 are provided, which is conducive to improving the stability of the guide shaft 130 when it is matched with the shaft hole 212. Specifically, when two connecting blocks 211 are provided, the two connecting blocks 211 are respectively provided near the upper part and the lower part of the focus frame 21; and when three or more connecting blocks 211 are provided, the connecting blocks 211 are provided at intervals along the thickness direction of the focus frame 21. The shaft holes 212 of equal size opened on the connecting blocks 211 are located on the same center line, which can ensure that the guide shaft 130 can smoothly pass through the shaft holes 212 of all the connecting blocks 211, thereby ensuring the stable installation and sliding of the focus frame 21 on the skeleton 10.

[0072] Furthermore, the connection blocks 211 are integrally connected to each other, thereby further enhancing stability.

[0073] In some embodiments, the lens assembly 100 further includes an appearance component (not shown in the drawings), which is sleeved on the frame 10 ; wherein the Hall sensor 42 is disposed on the appearance component adjacent to the linear magnet 41 .

[0074] In this embodiment, the appearance component is mounted on the frame 10, which not only provides protection for the entire assembly but also enhances the integrity of its appearance.

[0075] Furthermore, the Hall sensor 42 can also be arranged on the appearance part and be arranged adjacent to the linear magnet 41. In this way, the Hall sensor 42 no longer occupies the space of other key components in the skeleton 10, which helps to optimize the internal layout of the entire assembly and makes the installation and wiring of other components more convenient. Secondly, the appearance part, as the outer structure of the lens assembly 100, usually has a relatively stable shape and position, so arranging the Hall sensor 42 thereon can ensure the stability of its position and the accuracy of measurement. Finally, since the Hall sensor 42 is adjacent to the linear magnet 41, this layout ensures that the sensor can effectively sense the magnetic field changes of the magnet, thereby realizing accurate detection and control of the position of the lens assembly 100.

[0076] The present application also provides a lens, which includes the lens assembly 100 as described above.

[0077] The lens adopts all technical solutions of all embodiments of the above-mentioned lens assembly 100, and therefore has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0078] The present application also provides an image pickup device, which includes a camera body and the above lens. The image pickup device adopts all technical solutions of all embodiments of the above lens, and thus 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. Among them, the lens is detachably connected to the camera body.

[0079] 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: skeleton; A focus group, movably arranged in the frame along the axial direction of the frame, the focus group comprising a focus frame and a lens arranged on the focus frame; A driving member connected to the focusing frame, the driving member being used to drive the focusing frame to move along an axial direction; A position detector, comprising a linear magnet fixed to the focusing frame and a Hall sensor fixed to the frame, wherein the length direction of the linear magnet is consistent with the axial direction, and the Hall sensor is disposed adjacent to the linear magnet on its side; A controller is electrically connected to the Hall sensor and the driving element, and the controller controls the output power of the driving element according to the signal of the Hall sensor.

2. The lens assembly according to claim 1, characterized in that: The focusing frame is provided with a magnet mounting structure; the magnet mounting structure comprises: An embedding groove is formed on the side of the focusing frame for embedding and fixing the linear magnet; A disassembly hole is connected to the embedding groove and is arranged on both sides of the embedding groove. The depth of the disassembly hole is greater than the depth of the embedding groove, and the portion of the disassembly hole deeper than the embedding groove extends toward the bottom of the embedding groove.

3. The lens assembly according to claim 1, characterized in that: The frame is provided with a sensor mounting structure; the sensor mounting structure comprises: A mounting seat, provided with a card slot, wherein the card slot is used to fix the Hall sensor; An avoidance hole is provided on the frame and is used for passing a wire row connected to the Hall sensor so as to connect to the controller.

4. The lens assembly according to claim 1, characterized in that: The driving member is a voice coil motor, and the voice coil motor is arranged on the frame; The voice coil motor includes a frame and a coil and an electromagnet arranged on the frame, a first positioning portion is arranged at the bottom of the frame and a first locking portion is arranged at the side wall of the frame; the skeleton includes a supporting portion and an annular wall connected to the supporting portion, a second positioning portion is arranged on the supporting portion corresponding to the first positioning portion and a clamping block for clamping the frame is formed on the annular wall, and a second locking portion corresponding to the first locking portion is arranged on the clamping block.

5. The lens assembly according to claim 4, characterized in that: The framework includes: A first plate body; A second plate body connected to one long side of the first plate body, and the second plate body and the first plate body are perpendicular to each other; A third plate body, connected to the other long side of the first plate body, and the third plate body is parallel to the second plate body; A cover plate, which is disposed on the second plate body and the third plate body and is located on a side opposite to the first plate body; Wherein, the first positioning portion is arranged on the first plate body, the second plate body is arranged close to the annular wall and clamped by the clamping block, and the first locking portion is arranged on the second plate body.

6. The lens assembly according to claim 1, characterized in that: An axial hole is provided on the peripheral edge of the focusing frame, and a guide shaft is provided on the frame along the axial direction, and the guide shaft passes through the axial hole; Wherein, the axial assembly length of the guide shaft and the shaft hole is smaller than the thickness of the focusing frame.

7. The lens assembly according to claim 6, characterized in that: At least two connection blocks are formed on the peripheral edge of the focusing frame, and the at least two connection blocks are stacked in the axial direction. Each of the connection blocks is provided with an axial hole of equal size, and each of the axial holes is located on the same center line.

8. The lens assembly according to claim 1, characterized in that: The lens assembly further comprises an appearance component, and the appearance component is sleeved on the frame; Wherein, the Hall sensor is arranged on the appearance component adjacent to the linear magnet.

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 camera body is detachably connected to the lens.

Images