Back focus adjustment mechanism and camera device
By fixing the dual filter switcher to the front shell and electrically isolating it in the ABF camera device, the problem of black spots in the image caused by dust entering during the assembly process was solved, and high-precision back focus adjustment and imaging effect were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ANHONG TECHNOLOGY CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-02
Smart Images
Figure CN224319437U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ABF camera technology, and in particular to a back focus adjustment mechanism and a camera device. Background Technology
[0002] Auto Back Focus (ABF) cameras achieve precise focusing by automatically adjusting the position of the image sensor, thus solving the problem of image blurring after the infrared filter is removed in traditional cameras. In existing ABF cameras, the ICR (Dual Filter Switcher) component is assembled with the image sensor, and the ICR component moves with it. During production and assembly, because the position of the ICR component is variable, the entire back focus adjustment mechanism cannot be sealed at the lens mounting hole, making it prone to dust ingress. This dust accumulation can further contaminate the entire back focus adjustment mechanism and even the image sensor, resulting in black spots in the image. Utility Model Content
[0003] Given that existing ABF camera devices are prone to dust ingress during assembly and production, it is necessary to provide a back focus adjustment mechanism and an ABF camera device.
[0004] According to one aspect of this application, a back focus adjustment mechanism is provided for a camera device, comprising:
[0005] The housing includes a front housing having a receiving cavity, a rear housing covering the receiving cavity, and a guide post located within the receiving cavity and extending from the front housing to the rear housing, the front housing having a lens mounting hole for docking with the lens module of the camera device;
[0006] A leveling component is slidably mounted on the guide post;
[0007] A driving component is connected to the leveling component;
[0008] A photosensitive component, fixedly connected to the leveling component, the photosensitive component having a photosensitive surface arranged corresponding to the lens mounting hole; and
[0009] A dual filter switcher is located within the receiving cavity and covers the lens mounting hole. The dual filter switcher has a light-transmitting surface located on the light-sensitive path of the photosensitive surface.
[0010] In one embodiment, the dual filter switcher includes a fixed bracket fixedly connected to the front housing, a first filter, a second filter movably installed in the receiving cavity, and a first driving member driven by the second filter; the fixed bracket has a first light-transmitting hole communicating with the lens mounting hole and the first filter covers the first light-transmitting hole to form the light-transmitting surface.
[0011] In one embodiment, the back focus adjustment mechanism further includes an optocoupler mounted on the front housing, the optocoupler being communicatively connected to the dual filter switcher and the drive assembly.
[0012] In one embodiment, the leveling assembly includes a leveling bracket slidably fitted onto the guide post, a positioning bolt screwed onto the leveling bracket, and two leveling bolts screwed onto the leveling bracket, wherein the leveling bracket has a second light-transmitting hole located in the light-sensitive path of the photosensitive surface;
[0013] The two ends of the leveling bolt are respectively connected to the leveling bracket and the photosensitive component for leveling the photosensitive surface.
[0014] In one embodiment, the leveling bolt includes a bolt body and a support spring sleeved on the bolt body. The two ends of the support spring abut against the leveling bracket and the photosensitive component, respectively. The bolt body is screwed to the leveling bracket and the photosensitive component.
[0015] In one embodiment, the leveling bracket has a positioning hole corresponding to the positioning bolt, a leveling hole corresponding to the leveling bolt, a positioning bearing surface surrounding the positioning hole, and a leveling bearing surface surrounding the leveling hole. The distance between the positioning bearing surface and the photosensitive surface along the photosensitive path direction is greater than the distance between the leveling bearing surface and the photosensitive surface along the photosensitive path direction.
[0016] In one embodiment, the leveling component further has a support rib protruding from the positioning bearing surface.
[0017] In one embodiment, the drive assembly includes a drive ring rotatably mounted on the front housing, a ball mounted on the drive ring, a second drive member driven and connected to the drive ring, and a return spring located between the leveling assembly and the rear housing and sleeved on the guide post, with both ends of the return spring abutting against the leveling assembly and the rear housing, respectively.
[0018] The leveling assembly also has wedge-shaped protrusions for abutting the balls.
[0019] In one embodiment, the second driving member includes a gear and a drive motor connected to the gear, the outer peripheral surface of the drive ring is provided with a rack area, the drive motor is fixedly connected to the front housing, and the gear meshes with the rack area.
[0020] According to another aspect of this application, this application also provides a camera device, comprising:
[0021] Such as the aforementioned back focus adjustment mechanism; and
[0022] The lens module is installed in the lens mounting hole of the back focus adjustment mechanism.
[0023] In summary, this application ensures the internal sealing of the back focus adjustment mechanism during the entire camera assembly process by fixing the dual filter switcher to the front housing and covering the lens mounting hole with the light-transmitting surface of the dual filter switcher. This prevents black spots in the image caused by dust ingress. Simultaneously, since the drive assembly no longer moves the dual filter switcher, the load on the drive motor in the drive assembly is reduced, which helps improve drive accuracy and ensures the effectiveness of back focus adjustment. Furthermore, this application uses an optocoupler to electrically isolate the drive circuit of the dual filter switcher from the drive circuit of the drive assembly, avoiding electrical signal interference and further ensuring the accuracy of back focus adjustment. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of a rear focus adjustment mechanism involved in this application;
[0025] Figure 2 for Figure 1 The rear focus adjustment mechanism shown is a cross-sectional view along the AA direction;
[0026] Figure 3 for Figure 3 The exploded structural diagram of the rear focus adjustment mechanism is shown.
[0027] Figure 4 for Figure 3 The diagram shows a partial assembly of the rear focus adjustment mechanism.
[0028] Figure 5 for Figure 4 A schematic diagram of the assembled structure of the leveling component and the photosensitive component;
[0029] Figure 6 for Figure 5 Schematic diagram of the structure of the leveling bracket;
[0030] Figure 7 for Figure 6 The image shows a magnified view of the leveling bracket at point X.
[0031] Figure label:
[0032] 10. Housing; 101. Lens mounting hole; 11. Front housing; 12. Rear housing; 121. Sealing rear cover; 122. Mylar film; 13. Guide post;
[0033] 20. Dual filter switcher; 201. First light-transmitting hole; 21. Fixing bracket; 22. First filter; 23. Second filter; 24. First driving component;
[0034] 30. Photosensitive component; 301. Photosensitive surface; 31. Circuit board; 32. Photosensitive chip;
[0035] 40. Leveling component; 401. Leveling hole; 402. Positioning hole; 403. Leveling bearing surface; 404. Positioning bearing surface; 405. Second light-transmitting hole; 406. Recessed groove; 41. Leveling bracket; 42. Positioning bolt; 43. Leveling bolt; 431. Bolt body; 432. Support spring; 44. Wedge-shaped protrusion; 45. Support rib; 46. Reinforcing rib;
[0036] 50. Drive assembly; 51. Drive ring; 511. Rack area; 52. Ball bearing; 53. Return spring; 54. Second drive component; 541. Drive motor; 542. Gear;
[0037] 60. Optocoupler. Detailed Implementation
[0038] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0043] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0044] Auto Back Focus (ABF) cameras achieve precise focusing by automatically adjusting the position of the image sensor, thus solving the problem of image blurring after the infrared filter is removed in traditional cameras. In existing ABF cameras, the ICR (dual filter switcher 20) component is assembled with the photosensitive component, and the ICR component moves with it. During production and assembly, because the position of this ICR component is variable, the entire back focus adjustment mechanism cannot be sealed at the lens mounting hole, making it prone to dust ingress. This dust accumulation can further contaminate the entire back focus adjustment mechanism and even the photosensitive chip, resulting in black spots in the image.
[0045] Therefore, it is necessary to provide a dustproof back focus adjustment mechanism and camera device with high back focus adjustment accuracy.
[0046] Please see Figures 1 to 4In one embodiment provided in this application, the back focus adjustment mechanism includes a housing 10, a leveling assembly 40, a drive assembly 50, a photosensitive assembly 30, and a dual filter switcher 20 (i.e., ICR). The housing 10 includes a front housing 11, a rear housing 12, and guide posts 13 extending from the front housing 11 to the rear housing 12. The front housing 11 has a receiving cavity, and the rear housing 12 covers the receiving cavity. The front housing 11 also has a lens mounting hole 101 for docking with a lens module. The dual filter switcher 20 is located within the receiving cavity and covers the lens mounting hole. The hole 101 forms a closed space with the front shell 11 and the rear shell 12. The dual filter switcher 20 has a light-transmitting surface located on the light-sensitive path of the photosensitive surface 301. The leveling component 40 is slidably mounted on the guide post 13. The driving component 50 is driven and connected to the leveling component 40. The photosensitive component 30 is fixedly connected to the leveling component 40. The photosensitive component 30 has a photosensitive surface 301 arranged corresponding to the lens mounting hole 101. Under the driving action of the driving component 50, the photosensitive component 30 and the leveling component 40 move together to realize the back focus adjustment function. This application securely connects the dual filter switcher 20 to the front housing 11 and uses the light-transmitting surface of the dual filter switcher 20 to cover the lens mounting hole 101, ensuring the internal sealing of the back focus adjustment mechanism during the entire camera assembly process, avoiding the problem of black spots in the image caused by dust ingress. At the same time, since the drive assembly 50 no longer drives the dual filter switcher 20 to move, the load on the drive motor 541 in the drive assembly 50 is also reduced, which helps to improve the drive accuracy and ensure the effect of back focus adjustment.
[0047] like Figure 4 As shown, specifically, the dual filter switcher 20 includes a fixed bracket 21 fixedly connected to the front housing 11, a first filter 22, a second filter 23 movably installed in the receiving cavity, and a first driving member 24 driving the second filter 23. The fixed bracket 21 has a first light-transmitting hole 201 communicating with the lens mounting hole 101, and the first filter 22 covers the first light-transmitting hole 201 to form a light-transmitting surface. The first filter 22 is fixedly covered at the first light-transmitting hole 201, which further improves the sealing of the entire back focus adjustment mechanism at the lens mounting hole 101 and ensures dustproof effect.
[0048] Furthermore, to avoid electrical signal interference between the circuits containing the two driving components, in the embodiments provided in this application, the back focus adjustment mechanism also includes an optocoupler 60 mounted on the front housing 11. The optocoupler 60 is communicatively connected to the dual filter switcher 20 and the drive assembly 50. The optocoupler 60 electrically isolates the drive circuit of the dual filter switcher 20 from the drive circuit of the drive assembly 50, avoiding electrical signal interference and further ensuring the accuracy of the back focus adjustment.
[0049] Please see Figure 2 , Figure 5 and Figure 6To ensure imaging quality, in the embodiments provided in this application, the leveling assembly 40 includes a leveling bracket 41 slidably fitted onto the guide post 13, a positioning bolt 42 screwed onto the leveling bracket 41, and two leveling bolts 43 screwed onto the leveling bracket 41. The leveling bracket 41 has a second light-transmitting hole 405 located in the light-sensitive path of the photosensitive surface 301. The two ends of the leveling bolts 43 are respectively connected to the leveling bracket 41 and the photosensitive assembly 30 for leveling the photosensitive surface 301. In this way, the leveling action of the two leveling bolts 43 ensures that the photosensitive surface 301 is perpendicular to the optical axis, avoiding defocus and ensuring imaging quality.
[0050] Furthermore, for ease of adjustment, in the embodiments provided in this application, the leveling bolt 43 includes a bolt body 431 and a support spring 432 sleeved on the bolt body 431. The two ends of the support spring 432 abut against the leveling bracket 41 and the photosensitive component 30, respectively. The bolt body 431 is screwed to the leveling bracket 41 and the photosensitive component 30. Under the elastic support of the support spring 432, the photosensitive component 30 is lifted to a preset position, and leveling can be achieved by turning the bolt body 431.
[0051] Furthermore, to ensure sufficient adjustment range for the photosensitive component 30 relative to the leveling bracket 41, the leveling bracket 41 has a positioning hole 402 corresponding to the positioning bolt 42, a leveling hole 401 corresponding to the leveling bolt 43, a positioning bearing surface 404 surrounding the positioning hole 402, and a leveling bearing surface 403 surrounding the leveling hole 401. The distance between the positioning bearing surface 404 and the photosensitive surface 301 along the photosensitive path is greater than the distance between the leveling bearing surface 403 and the photosensitive surface 301 along the photosensitive path. In short, the positioning bearing surface 404 protrudes higher from the surface of the leveling bracket 41. During the leveling process, the circuit board 31 of the photosensitive component 30 will not be interfered with by the position of the surface of the leveling bracket 41, thereby ensuring the adjustment range and preventing the circuit board 31 of the photosensitive component 30 from being deformed by pressure.
[0052] Furthermore, due to the presence of the positioning bolt 42, the photosensitive component 30 needs to be pre-positioned to the preset position of the leveling bracket 41 by the positioning bolt 42. As a result, during the leveling process, the area where the circuit board 31 of the photosensitive component 30 is fixed by the positioning bolt 42 is prone to deformation, thus affecting the flatness of the photosensitive surface 301. Loosening the positioning bolt 42 can easily increase the difficulty of leveling and reduce the leveling accuracy. Based on this, if... Figure 7As shown in the embodiment provided in this application, the leveling component 40 also has a support rib 45 protruding from the positioning support surface 404. This reduces the contact area between the circuit board 31 of the photosensitive component 30 and the leveling component 40, reduces the local deformation of the circuit board 31 during the leveling process, and ensures the leveling accuracy and the flatness of the photosensitive surface 301. Optionally, in this embodiment, the support rib 45 is integrally formed into the leveling bracket 41, that is, integrally formed during injection molding. At the same time, the support rib 45 and the leveling bracket 41 are both rigid structures and are not easily deformed during contact with the circuit board 31, which also helps to improve the leveling accuracy.
[0053] Optionally, in the embodiments provided in this application, the leveling bracket 41 is further provided with multiple recessed grooves 406, which further reduces the weight of the leveling component 40, thereby reducing the driving pressure of the second driving member 54 and improving the accuracy of back focus adjustment. To ensure the structural strength of the leveling bracket 41, the multiple recessed grooves 406 are distinguished by reinforcing ribs 46; the leveling bracket 41 is divided into a main body providing the second light-transmitting hole 405 and an extension extending from the main body. The extension is sleeved on the guide post 13. To enhance the connection strength between these two parts, in the embodiments provided in this application, multiple regularly distributed reinforcing ribs 46 are also provided between the main body and the extension of the leveling bracket 41. The design of the recessed grooves 406 reduces the weight of the leveling bracket 41 while increasing its structural strength, thus achieving a lightweight and high-strength structure, which greatly improves the focusing and leveling accuracy.
[0054] like Figure 4As shown, in order to achieve back focus adjustment within the confined space inside the back focus adjustment mechanism, in the embodiment provided in this application, the drive assembly 50 includes a drive ring 51 rotatably mounted on the front housing 11, a ball bearing 52 mounted on the drive ring 51, a second drive member 54 connected to the drive ring 51, and a return spring 53 located between the leveling assembly 40 and the rear housing 12 and sleeved on the guide post 13. The two ends of the return spring 53 abut against the leveling assembly 40 and the rear housing 12, respectively. The leveling assembly 40 also has a wedge-shaped protrusion 44 for abutting against the ball bearing 52. The rotation of the drive ring 51 is converted into axial movement of the leveling bracket 41 by the contact between the wedge-shaped protrusion 44 and the ball bearing 52. Under the pushing action of the return spring 53, the leveling bracket 41 can return to its original position, thereby achieving back focus adjustment within the confined space. Specifically, the second driving component 54 includes a gear 542 and a drive motor 541 connected to the gear 542. The outer circumferential surface of the drive ring 51 is provided with an arc-shaped rack area 511, and the drive motor 541 is fixedly connected to the front housing 11. The drive ring 51 has a circular hole for accommodating the ball 52 and an arc-shaped groove for accommodating the wedge-shaped protrusion 44. When the leveling bracket 41 is in its original position, the ball 52 is separated from the wedge-shaped protrusion 44 and abuts against the side of the leveling bracket 41 facing the front housing 11. During the back focus adjustment process, the drive motor 541 drives the gear 542 to rotate, pushing the drive ring 51 to rotate counterclockwise. The ball 52 is pushed by the drive ring 51 to the wedge-shaped protrusion 44. When the ball 52 abuts against the tip of the wedge-shaped protrusion 44, the leveling bracket 41 and the photosensitive component 30 mounted on the leveling bracket 41 are pushed to the position where the back focus change is the greatest during back focus adjustment.
[0055] Optionally, in one embodiment provided in this application, the leveling assembly 40 further includes a curing portion, which is wrapped around the leveling bolt 43 and the positioning bolt 42 and fixedly connected to the circuit board 31 of the photosensitive assembly 30. During actual assembly, after leveling is completed, the relative position between the photosensitive assembly 30 and the leveling bracket 41 is fixed by dispensing adhesive, thereby forming the curing portion including the leveling bolt 43 and the positioning bolt 42 on the surface of the circuit board 31 of the photosensitive assembly 30.
[0056] Optionally, in one embodiment provided in this application, the rear shell 12 includes a sealing rear cover 121 and a Mylar sheet 122 detachably connected to the sealing rear cover 121. Specifically, the sealing rear cover 121 has an access hole, and the Mylar sheet 122 is sealed within the access hole. It is worth noting that, as Figure 2 , Figure 4 and Figure 6As shown, in the embodiments provided in this application, the first drive member 24 and the fixed bracket 21 of the dual filter switcher 20, and the photosensitive chip 32 of the photosensitive component 30 are all located inside the second light-transmitting hole 405. This avoids interference between the above structure and the leveling bracket 41, ensures that the leveling bracket 41 has sufficient stroke when sliding on the guide post 13 during back focus adjustment, and also achieves a compact layout inside the back focus adjustment mechanism.
[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0058] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A back focus adjustment mechanism for a camera device, characterized in that, include: The housing (10) includes a front housing (11) having a receiving cavity, a rear housing (12) covering the receiving cavity, and a guide post (13) located in the receiving cavity and extending from the front housing (11) to the rear housing (12). The front housing (11) has a lens mounting hole (101) for docking with the lens module of the camera device. The leveling component (40) is slidably mounted on the guide post (13); A drive assembly (50) is connected to the leveling assembly (40). A photosensitive component (30) is fixedly connected to the leveling component (40), the photosensitive component (30) having a photosensitive surface (301) arranged corresponding to the lens mounting hole (101); and A dual filter switcher (20) is located within the receiving cavity and covers the lens mounting hole (101). The dual filter switcher (20) has a light-transmitting surface located in the light-sensitive path of the photosensitive surface (301).
2. The rear focus adjustment mechanism according to claim 1, characterized in that, The dual filter switcher (20) includes a fixed bracket (21) fixedly connected to the front housing (11), a first filter (22), a second filter (23) movably installed in the receiving cavity, and a first drive member (24) driving the second filter (23); the fixed bracket (21) has a first light-transmitting hole (201) communicating with the lens mounting hole (101), and the first filter (22) covers the first light-transmitting hole (201) to form the light-transmitting surface.
3. The rear focus adjustment mechanism according to claim 1, characterized in that, The rear focus adjustment mechanism also includes an optocoupler (60) mounted on the front housing (11), which is communicatively connected to the dual filter switcher (20) and the drive assembly (50).
4. The rear focus adjustment mechanism according to any one of claims 1 to 3, characterized in that, The leveling assembly (40) includes a leveling bracket (41) slidably sleeved on the guide post (13), a positioning bolt (42) screwed to the leveling bracket (41), and two leveling bolts (43) screwed to the leveling bracket (41). The leveling bracket (41) has a second light-transmitting hole (405) located in the light-sensitive path of the photosensitive surface (301). The two ends of the leveling bolt (43) are respectively connected to the leveling bracket (41) and the photosensitive component (30) for leveling the photosensitive surface (301).
5. The rear focus adjustment mechanism according to claim 4, characterized in that, The leveling bolt (43) includes a bolt body (431) and a support spring (432) sleeved on the bolt body (431). The two ends of the support spring (432) abut against the leveling bracket (41) and the photosensitive component (30) respectively. The bolt body (431) is screwed to the leveling bracket (41) and the photosensitive component (30).
6. The rear focus adjustment mechanism according to claim 4, characterized in that, The leveling bracket (41) has a positioning hole (402) corresponding to the positioning bolt (42), a leveling hole (401) corresponding to the leveling bolt (43), a positioning bearing surface (404) surrounding the positioning hole (402), and a leveling bearing surface (403) surrounding the leveling hole (401). The distance between the positioning bearing surface (404) and the photosensitive surface (301) along the photosensitive path direction is greater than the distance between the leveling bearing surface (403) and the photosensitive surface (301) along the photosensitive path direction.
7. The rear focus adjustment mechanism according to claim 6, characterized in that, The leveling component (40) also has a support rib (45) protruding from the positioning bearing surface (404).
8. The rear focus adjustment mechanism according to claim 1, characterized in that, The drive assembly (50) includes a drive ring (51) rotatably mounted on the front shell (11), a ball bearing (52) mounted on the drive ring (51), a second drive member (54) connected to the drive ring (51), and a return spring (53) located between the leveling assembly (40) and the rear shell (12) and sleeved on the guide post (13). The two ends of the return spring (53) abut against the leveling assembly (40) and the rear shell (12) respectively. The leveling assembly (40) also has a wedge-shaped protrusion (44) for abutting the ball (52).
9. The rear focus adjustment mechanism according to claim 8, characterized in that, The second drive includes a gear (542) and a drive motor (541) connected to the gear (542). The outer circumferential surface of the drive ring (51) is provided with a rack area (511). The drive motor (541) is fixedly connected to the front shell (11). The gear (542) meshes with the rack area (511).
10. A camera device, characterized in that, include: The rear focus adjustment mechanism as described in any one of claims 1-9; and The lens module is installed in the lens mounting hole (101) of the back focus adjustment mechanism.