Optical actuator and corresponding camera module

Abstract

The present invention relates to an optical actuator, which comprises: a housing; a lens carrier, which comprises a cylindrical portion and a flat plate portion extending outward from the bottom of the cylindrical portion; a driving device, which is suitable for driving the lens carrier to move relative to the housing along the axis of the cylindrical portion, and the cylindrical portion is suitable for extending from the housing light hole or retracting into the housing under the action of the driving device; and a partition component, the top and bottom of which are respectively connected to the lower surface of the top cover of the housing and the upper surface of the flat plate portion; the partition component comprises a cylindrical partition membrane, which surrounds the cylindrical portion, and the cylindrical wall of the partition membrane is folded into a corrugated shape. The present invention also provides a corresponding camera module. The present invention can form a complete barrier at the gap between the lens and the housing through the outer wall of the cylindrical portion, the top surface of the flat plate portion and the retractable partition membrane, thereby preventing dust and liquid from penetrating from the gap between the lens and the housing.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and in particular to an optical actuator and a corresponding camera module. Background Art

[0002] Mobile phone camera modules are one of the important components of smart equipment, and their application scope and volume in the market are growing. With the advancement of technology, both work and life are promoting intelligence, and one of the important prerequisites for achieving intelligence is to be able to achieve good interaction with the external environment. One of the important ways to achieve good interaction is visual perception, which mainly relies on camera modules. It can be said that camera modules have transformed from obscure smart equipment accessories to one of the key components of smart equipment.

[0003] As one of the standard configurations of intelligent electronic terminal devices (hereinafter sometimes referred to as intelligent terminals), the camera module has been changing in form and function with the intelligent terminals and market demand. The development trend of intelligent terminals has been developing in the direction of high integration and thinness, while the camera module is constantly adding functions. The addition of some functions will increase the size of the camera module to a certain extent. In the future design of camera modules, the installation space of the modules that only meet the previous fewer functions has become increasingly difficult to meet the requirements. Specifically, the camera module is constantly innovating in design, for example, from the original simple single-camera module to dual-camera and multi-camera modules; from the original single straight optical path design to the design with complex turning optical paths; from the original single focal length and small range zoom capability to a large range of optical zoom, etc. These developments have continuously expanded the shooting capabilities of camera modules, but have also put forward higher requirements for the pre-installed space inside intelligent terminals (such as smart phones). At present, the pre-installed space inside intelligent terminals has become increasingly difficult to meet the development requirements of camera modules.

[0004] In order to reduce the requirements for pre-installed space, a retractable sleeve camera module has been proposed. The sleeve camera module (sometimes referred to as the sleeve module in this article) has a coaxially arranged multi-layer sleeve, and each lens of the lens group can be installed in different sleeves. In the retracted state, the inner sleeve can be accommodated inside the outer sleeve, thereby reducing the occupied volume of the camera module, and when the sleeve module is installed inside the smart terminal as a rear camera module, the surface of the camera module installation area on the back of the smart terminal can be basically flat. In the extended state, the inner sleeve (or outer sleeve) can be extended from the original position to adjust the axial position of the lens in the sleeve in the optical system (here the axial position refers to the position in the direction of the optical axis of the camera module), which plays the role of optical zoom or increasing the back focal length of the optical system. Among them, for the telephoto module, it often requires a larger back focal length, which is one of the important reasons why the telephoto module occupies a large space. As for the telescopic sleeve structure, since at least one of the sleeves can move relative to the other sleeves in the direction along the optical axis, it can drive the lens group away from the photosensitive chip, thus increasing the back focus distance of the optical system. However, in the existing sleeve-type modules, it is often necessary to make a more complex transmission structure on the side wall of the sleeve. For example, a sleeve-type module scheme is to set a gear on the outside of the outermost sleeve, and a gear groove that meshes with the gear needs to be made on the side wall of the sleeve (the inner side and / or the outer side of the side wall), so that the sleeve can be driven to rotate by rotating the gear, so that the sleeve spirally rises (the rising direction is the direction of extension along the optical axis) to move away from the photosensitive chip, and construct the imaging light path required for shooting (for example, the imaging light path required for the telephoto module). Although the above-mentioned telescopic sleeve structure can switch between the two states of contraction and extension, its transmission structure is complex, and the side wall of the sleeve needs to be processed with a precision mechanical structure, so its reliability may be insufficient (for example, impact resistance). In addition, since the side wall of the sleeve needs to be processed with a precision mechanical structure, the side wall of the sleeve needs a greater structural strength, making it difficult to reduce the thickness of the side wall of the sleeve, which is not conducive to reducing the lateral size of the camera module. The lateral size in this article refers to the radial size of the camera module, and the radial size of the camera module refers to the direction perpendicular to the optical axis of the camera module. The longitudinal size of the camera module is the size in the direction of the optical axis of the camera module, that is, the height of the camera module.

[0005] Furthermore, in the prior art, after the camera module is installed in a terminal device such as a mobile phone, the top of the camera module is usually covered by a glass cover. The glass cover can give the camera module better dustproof ability. For a camera module with an optical actuator, the glass cover can be installed on the top surface of the housing of the optical actuator and cover the light hole of the housing, so that the optical lens is encapsulated as a whole inside the housing. However, for a telescopic camera module in which the optical lens needs to extend out of the light hole of the actuator housing, the original glass cover used for encapsulation will no longer be applicable. If the above-mentioned glass cover is cancelled, dust may enter the module from the gap between the housing of the telescopic camera module and the optical lens and other auxiliary components, and then fall into the imaging light path of the camera module. This situation will cause spots to appear in the captured picture, and in severe cases, the entire camera module will be scrapped.

[0006] Therefore, there is an urgent need for a telescopic camera module solution with dustproof function.

[0007] Furthermore, the market requires camera modules to be dustproof and waterproof. For telescopic camera modules, since the optical lens needs to extend out of the light hole of the actuator housing, it is difficult to encapsulate it with a glass cover that covers the actuator housing as a whole. Therefore, the waterproof design of the telescopic camera module is also a major problem currently faced. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a telescopic optical actuator and camera module solution with dustproof capability.

[0009] Furthermore, another object of the present invention is to overcome the deficiencies of the prior art and provide a telescopic optical actuator and camera module solution that is not only dustproof but also waterproof.

[0010] To solve the above technical problems, the present invention provides an optical actuator, which includes: a shell having a shell light-through hole at the top; a lens carrier, which includes a cylindrical portion and a flat plate portion extending outward from the bottom of the cylindrical portion; a driving device, which is suitable for driving the lens carrier to move relative to the shell along the axis of the cylindrical portion, and the cylindrical portion is suitable for extending from the shell light-through hole or retracting into the shell under the action of the driving device; and a partition component, whose top and bottom are respectively connected to the lower surface of the top cover of the shell and the upper surface of the flat plate portion; the partition component includes a cylindrical partition membrane, which surrounds the cylindrical portion, and the cylindrical wall of the partition membrane is folded into a corrugated shape, so that it is suitable for expanding and contracting in the axial direction of the cylindrical portion.

[0011] Among them, the separation assembly also includes a first annular sheet and a second annular sheet, the first annular sheet is connected to the top of the separation membrane, and the second annular sheet is connected to the bottom of the separation membrane; the top surface of the first annular sheet is connected to the lower surface of the top cover of the shell, and the bottom surface of the second annular sheet is connected to the upper surface of the flat plate part.

[0012] The top surface of the first annular sheet is bonded to the lower surface of the top cover of the shell by waterproof glue; the bottom surface of the second annular sheet is bonded to the upper surface of the flat plate portion by waterproof glue.

[0013] The waterproof glue is arranged between the bottom surface of the second annular sheet and the upper surface of the flat plate portion, and between the inner side surface of the second annular sheet and the outer side surface of the cylindrical portion.

[0014] There is an annular gap between the top cover of the shell and the cylindrical body, and the width of the annular gap in the radial direction is 0.05-0.2 mm.

[0015] Wherein, the cylindrical wall of the separation membrane does not contact the cylindrical portion in a completely folded state.

[0016] The inner side surface of the cylindrical portion is suitable for installing an optical lens; the top of the cylindrical portion has a step structure, and a light-transmitting cover is installed on the step structure and encapsulates the optical lens inside the cylindrical portion.

[0017] Wherein, the step structure includes an annular horizontal step surface and an annular side wall, and the bottom surface of the light-transmitting cover plate is fixed to the annular horizontal step surface by waterproof glue.

[0018] Wherein, the waterproof glue is also arranged in the gap between the light-transmitting cover plate and the annular side wall of the step structure.

[0019] Wherein, the driving device is a piezoelectric driving device.

[0020] In which, the optical actuator also includes a support seat connected and fixed to the shell, and the piezoelectric drive device includes a fixed part, a driving rod, a piezoelectric element and a moving part, the fixed part is fixed to the support seat, the moving part is fixed to the flat plate part, one end of the driving rod is fixed to the piezoelectric element, and the axial direction of the driving rod is parallel to the axial direction of the cylindrical part; the moving part is movably connected to the driving rod through a friction member, and the piezoelectric element is installed on the fixed part and is suitable for vibrating in the direction of the axial line of the driving rod to drive the moving part to move relative to the driving rod along the axial line of the driving rod.

[0021] Wherein, the support seat is located at the bottom of the shell, and the support seat has a central light-through hole; the first annular sheet and the second annular sheet are made of rubber, metal or plastic; and the separation membrane is made of PTFE.

[0022] Wherein, in a top view, the shell is rectangular, a plurality of the piezoelectric drive devices are arranged in a corner area of ​​the shell, and the lens carrier is jointly supported by the drive rods of the plurality of the piezoelectric drive devices.

[0023] Wherein, the driving device also includes an auxiliary guiding device, which includes a guide rod whose axis is parallel to the driving rod, the bottom of the guide rod is fixed to the support seat, and the flat plate portion of the lens carrier is movably connected to the guide rod; one or more driving rods and one or more guide rods jointly support the lens carrier.

[0024] The flat plate portion has a first adapting structure, the moving portion is a metal clamping sheet, the metal clamping sheet is mounted on the first adapting structure, the metal clamping sheet forms a through hole, and the driving rod passes through the through hole.

[0025] Among them, the flat plate part also has a second adaptation structure, which includes two clamping arms. An unclosed hole structure can be formed between the two clamping arms. A guide rod passes through the hole structure. The axis of the guide rod is parallel to the driving rod, and the bottom of the guide rod is fixed to the support seat.

[0026] The flat plate portion also has a third adapter structure, the center of the third adapter structure may have a positioning hole, the support seat has a positioning column, the positioning column passes upward through the positioning hole and is movably connected to the third adapter structure; a ball is arranged between the hole wall of the positioning hole and the outer side surface of the positioning column, and there are multiple balls surrounding the positioning column.

[0027] According to another aspect of the present application, a telescopic camera module is also provided, which includes: the optical actuator described in any of the aforementioned schemes; an optical lens, which is installed on the inner side surface of the cylindrical portion of the lens carrier; and a photosensitive component, which is installed below the optical actuator, and the photosensitive chip of the photosensitive component is arranged below the light hole of the shell and the optical lens.

[0028] Compared with the prior art, the present invention has at least one of the following technical effects:

[0029] 1. Compared with the periscope telephoto module, the piezoelectrically driven sleeve module of the present application has a retractable function, which can reduce the pre-installed space inside the smart terminal. In the extended state, it can provide the optical path length required for shooting (especially telephoto shooting).

[0030] 2. The telescopic optical actuator and camera module of the present application can form a complete barrier in the gap between the lens and the housing through the outer wall of the cylindrical part of the lens carrier, the top surface of the flat part and the retractable partition membrane, thereby allowing the lens to have telescopic ability while preventing dust from penetrating into the interior of the camera module through the gap between the lens and the housing.

[0031] 3. In some embodiments of the present application, the telescopic optical actuator and the camera module can bond the partition assembly to the housing and the lens carrier by waterproof glue, thereby forming a complete waterproof barrier at the gap between the lens and the housing, thereby achieving a high level of waterproof function while allowing the lens to have telescopic capabilities. On the other hand, the top of the optical lens itself is also covered with a glass cover plate, which can play a waterproof and dustproof role for the optical lens itself extending outside the housing, and the glass cover plate can also protect the optical lens from collision and other protective effects.

[0032] 4. In some embodiments of the present application, the top and bottom of the partition membrane are connected to the first annular sheet and the second annular sheet to form a partition assembly, and then the partition assembly is integrally bonded to the shell and the lens carrier. This design is easy to implement in terms of process, helps to improve production efficiency and production yield, and is particularly suitable for large-scale mass production.

[0033] At the same time, this solution has a simple structure and better reliability.

[0034] 5. In some embodiments of the present application, the flat plate portion of the lens carrier can not only help achieve dust and water proofing functions, but also serve as a connecting structure for the piezoelectric drive device and its attached driven device, which helps to improve the space utilization of the optical actuator and the camera module, thereby realizing the miniaturization of the telescopic camera module.

[0035] 6. In some embodiments of the present application, the lens carrier can be supported by a piezoelectric drive device and its attached driven device, which can not only ensure the balance of the lens carrier and the straightness of its moving path, but also help reduce the number of piezoelectric drive devices, thereby reducing device costs.

[0036] 7. In some embodiments of the present application, the driving device can be supported by the driving rod of the piezoelectric driving device and the driven rod (guide rod or positioning column) of the auxiliary guiding device, wherein the positioning column can be movably connected to the third adapter structure of the flat plate portion of the lens carrier through a ball structure. This design can better improve the linearity of the movement of the lens carrier, and through the radial support of the ball, the movement resistance of the lens carrier can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the three-dimensional structure of a telescopic camera module in one embodiment of the present application is shown;

[0038] Figure 2a A schematic diagram showing the appearance of a telescopic camera module in an embodiment of the present application in a retracted state;

[0039] Figure 2b A schematic diagram showing the appearance of a telescopic camera module in an extended state in one embodiment of the present application is shown;

[0040] Figure 3 A schematic diagram of the three-dimensional structure of an optical lens and a lens carrier in one embodiment of the present application is shown;

[0041] Figure 4 A three-dimensional schematic diagram of a partition assembly in an embodiment of the present application in a stretched state is shown;

[0042] Figure 5 A three-dimensional schematic diagram of a partition assembly in an embodiment of the present application in a folded state is shown;

[0043] Figure 6 A three-dimensional schematic diagram showing a partition assembly in an embodiment of the present application in a stretched state after being longitudinally cut open;

[0044] Figure 7 A three-dimensional schematic diagram showing a folded state of a partition assembly in one embodiment of the present application after being longitudinally cut open;

[0045] Figure 8 A three-dimensional schematic diagram of a telescopic camera module according to an embodiment of the present application is shown in a first viewing angle after the housing and the partition assembly are removed;

[0046] Fig. 9 A three-dimensional schematic diagram of a telescopic camera module according to an embodiment of the present application is shown in a second viewing angle after the housing and the partition assembly are removed;

[0047] Fig.10 A three-dimensional schematic diagram of a telescopic camera module in a retracted state without a housing in one embodiment of the present application is shown;

[0048] Fig.11 A three-dimensional schematic diagram of a telescopic camera module in an extended state with a housing removed in one embodiment of the present application is shown;

[0049] Fig.12 A three-dimensional schematic diagram of a telescopic camera module with the housing and the light-transmitting cover removed in one embodiment of the present application is shown;

[0050] Fig.13 A schematic diagram of the structure of a piezoelectric drive assembly in one embodiment of the present application is shown;

[0051] Fig.14A schematic diagram showing a piezoelectric element and a corresponding driving rod to realize a vibration conduction function;

[0052] Fig.15 A cross-sectional stereoscopic schematic diagram of a mold for making a partition component and the partition component made in one embodiment of the present application is shown;

[0053] Fig.16 A three-dimensional schematic diagram of a mold for making a partition component and the partition component made in one embodiment of the present application is shown. DETAILED DESCRIPTION

[0054] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0055] It should be noted that in this specification, the expressions of first, second, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Therefore, without departing from the teaching of this application, the first subject discussed below can also be referred to as the second subject.

[0056] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0057] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, wholes, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, parts and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0058] As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation, not degree, and are intended to account for the inherent variations in measurements or calculations that would be recognized by those of ordinary skill in the art.

[0059] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0060] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0061] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0062] According to one embodiment of the present invention, a telescopic optical actuator is provided. An optical lens can be installed in the telescopic optical actuator to form a lens assembly. The lens assembly can be assembled with a photosensitive assembly to form a camera module. The camera module based on the telescopic optical actuator can realize the extension and retraction of the optical lens from the light hole of the housing, and therefore can also be called a telescopic camera module. Figure 1 The 3D structure diagram of the telescopic camera module in one embodiment of the present application is shown. Figure 1 , wherein the optical actuator comprises: a housing 100, a lens carrier 200, a driving device and a partition assembly. Further, Figure 2a A schematic diagram of the appearance of a telescopic camera module in an embodiment of the present application is shown in a retracted state. Figure 2b A schematic diagram of the appearance of a telescopic camera module in an extended state in one embodiment of the present application is shown. Figure 3 The 3D structure diagram of the optical lens and the lens carrier in one embodiment of the present application is shown. Figure 1 , Figure 2a , Figure 2b and Figure 3 In this embodiment, the top of the housing 100 has a housing light hole 101. The lens carrier 200 may include a cylindrical portion 210 and a flat portion 220 extending outward from the bottom of the cylindrical portion 210. The driving device 300 is suitable for driving the lens carrier 200 to move along the axis of the cylindrical portion 210 relative to the housing 100, and the cylindrical portion 210 is suitable for extending from the housing light hole 101 or retracting into the housing 100 under the action of the driving device 300. Further, Figure 4 A three-dimensional schematic diagram of a partition assembly in an embodiment of the present application in a stretched state is shown; Figure 5 A three-dimensional schematic diagram of a partition assembly in an embodiment of the present application in a folded state is shown; Figure 6A three-dimensional schematic diagram showing a partition assembly in an embodiment of the present application in a stretched state after being longitudinally cut open; Figure 7 The 3D schematic diagram of the folded state of the partition assembly in one embodiment of the present application after being longitudinally cut open is shown. Figure 4-7 In this embodiment, the top and bottom of the partition assembly 400 are connected to the lower surface of the top cover of the shell 100 and the upper surface of the flat plate portion 220, respectively. The partition assembly 400 includes a cylindrical partition membrane 430, the partition membrane 430 surrounds the cylindrical portion 210, and the cylindrical wall of the partition membrane 430 is folded into a corrugated shape, so that it is suitable for expansion and contraction in the axial direction of the cylindrical portion 210. In this embodiment, the partition assembly 400 may also include a first annular sheet 410 and a second annular sheet 420, the first annular sheet 410 is connected to the top of the partition membrane 430, and the second annular sheet 420 is connected to the bottom of the partition membrane 430; the top surface of the first annular sheet 410 is connected to the lower surface of the top cover of the shell 100, and the bottom surface of the second annular sheet 420 is connected to the upper surface of the flat plate portion 220. In this embodiment, the first annular sheet 410 and the second annular sheet 420 can provide a flat glue area or bonding area with sufficient width for the glue material, so as to facilitate the bonding of the partition assembly 400 with the housing 100 and the lens carrier 200. Further, the outer side surfaces of the first annular sheet 410 and the second annular sheet 420 can respectively have parallel cutting surfaces, so that the clamp of the assembly equipment can clamp the annular sheet and the second annular sheet, thereby realizing automated production. Among them, the parallel cutting surfaces are generally arranged in pairs, and the two parallel cutting surfaces in a pair are respectively arranged on both sides of the first annular sheet 410 or the second annular sheet.

[0063] Further, in one embodiment of the present application, in the telescopic optical actuator, the top surface of the first annular sheet 410 and the lower surface of the top cover of the housing 100 may be bonded by waterproof glue. The bottom surface of the second annular sheet and the upper surface of the flat plate portion 220 may be bonded by waterproof glue. The separation membrane 430 may be a water-impermeable plastic film, such as a PTFE film. The full name of PTFE is Poly tetra fluoroethylene, which can be translated as polytetrafluoroethylene. The first annular sheet 410 and the second annular sheet may be made of rubber, metal or plastic. In this embodiment, glue can be applied to the flat plate portion 220 of the lens carrier 200, and then the partition assembly 400 can be placed around the cylindrical portion 210 of the lens carrier 200 so that the second annular sheet 420 at the bottom is in contact with the glue material (the glue material here is a waterproof glue in a colloid state). Next, glue can be applied to the top surface (i.e., upper surface) of the first annular sheet 410 at the top of the partition assembly 400, and then the lower surface of the top cover of the housing 100 can be bonded to the top surface of the first annular sheet 410. Finally, the glue material (e.g., waterproof glue) can be cured by heating (or light or other methods), thereby completing the bonding of the partition assembly 400 to the housing 100 and the lens carrier 200. In a modified embodiment, the waterproof glue can be replaced by double-sided tape. Using double-sided tape to bond the partition assembly 400 to the housing 100 and the lens carrier 200 can reduce the process difficulty and improve the production efficiency. This solution is suitable for situations where the waterproof level requirement is low.

[0064] Further, Figure 8 A three-dimensional schematic diagram of a telescopic camera module according to an embodiment of the present application is shown in a first viewing angle after the housing and the partition assembly are removed; Fig. 9 A three-dimensional schematic diagram of a telescopic camera module according to an embodiment of the present application is shown in a second viewing angle after the housing and the partition assembly are removed; Fig.10 A three-dimensional schematic diagram of a telescopic camera module in a retracted state without a housing in one embodiment of the present application is shown; Fig.11 A three-dimensional schematic diagram of a telescopic camera module in an extended state with a housing removed in one embodiment of the present application is shown; Fig.12 A three-dimensional schematic diagram of a telescopic camera module without the housing and the light-transmitting cover sheet in one embodiment of the present application is shown. Figure 8-Figure 12 In one embodiment of the present application, in the telescopic optical actuator, the waterproof glue can be arranged between the bottom surface of the second annular sheet 420 and the upper surface of the flat plate portion 220, and between the inner side surface of the second annular sheet 420 and the outer side surface of the cylindrical portion 210. This design can increase the bonding strength between the second annular sheet 420 and the lens carrier 200, so that the waterproof effect and reliability of the optical actuator and the corresponding camera module are improved.

[0065] Furthermore, still in combination with reference Figure 8-Figure 12 In one embodiment of the present application, in the telescopic optical actuator, there is an annular gap between the top cover of the housing 100 and the cylindrical body, and the width of the annular gap in the radial direction is 0.05-0.2 mm (here the radial direction is the direction perpendicular to the central axis of the cylindrical portion 210, that is, the direction perpendicular to the optical axis of the telescopic camera module). The cylindrical wall of the partition membrane 430 does not contact the cylindrical portion 210 in a fully folded state. Specifically, the partition membrane 430 can be made not to contact the cylindrical portion 210 in a fully folded state by adjusting the folded width of the partition membrane 430 and adjusting the setting position of the partition membrane 430, thereby preventing the partition membrane 430 from interfering with the telescopic movement of the lens carrier 200. At the same time, it can also prevent the partition membrane 430 from being worn or even broken by the scratch of the lens carrier 200. In the unfolded state (i.e., the stretched state), the partition membrane 430 is also not in contact with the carrier of the lens.

[0066] Furthermore, combined with reference Figure 3 and Fig.12 In one embodiment of the present application, in the lens carrier 200 of the optical actuator, the inner side surface of the cylindrical portion 210 is suitable for mounting the optical lens 700. In this embodiment, the top of the cylindrical portion 210 may have a step structure 211, and a transparent cover sheet 240 is mounted on the step structure 211 and encapsulates the optical lens 700 inside the cylindrical portion 210 (see reference 2). Figure 8-Figure 11 ). Specifically, the step structure 211 includes an annular horizontal step surface 212 and an annular side wall 213, and the bottom surface of the light-transmitting cover plate 240 is fixed to the annular horizontal step surface 212 by waterproof glue, so that the optical actuator and the corresponding camera module have a better waterproof effect. Furthermore, in one embodiment of the present application, the gap between the light-transmitting cover plate 240 and the annular side wall 213 of the step structure 211 can also be arranged with the waterproof glue, so as to enhance the waterproof ability of the optical actuator and the corresponding camera module.

[0067] Further, refer to Figure 8In one embodiment of the present application, the driving device 300 may include a piezoelectric driving device 310. The telescopic optical actuator also includes a support seat 500 connected and fixed to the housing 100, and the piezoelectric driving device 310 includes a fixed portion 311, a driving rod 312, a piezoelectric element 313 and a moving portion 314, wherein the fixed portion 311 is fixed to the support seat 500, the moving portion 314 is fixed to the flat portion 220, one end of the driving rod 312 is fixed to the piezoelectric element 313, and the axial direction of the driving rod 312 is parallel to the axial direction of the cylindrical portion 210; the moving portion 314 is movably connected to the driving rod 312 through a friction member, and the piezoelectric element 313 is installed on the fixed portion 311 and is suitable for vibrating in the direction of the axial direction of the driving rod 312 to drive the moving portion 314 to move along the axial direction of the driving rod 312 relative to the driving rod 312. In this embodiment, the support seat 500 is located at the bottom of the housing 100 and has a central light hole. The main body of the piezoelectric drive device 310 (including the fixing portion 311 and the piezoelectric element 313) can be disposed in the gap between the upper surface of the support seat 500 and the lower surface of the flat plate portion 220 of the lens carrier 200.

[0068] Fig.13 FIG. 1 is a schematic diagram showing the structure of a piezoelectric drive assembly in an embodiment of the present application. Fig.13 In this embodiment, the piezoelectric drive assembly includes: a piezoelectric element 313 (sometimes also called a piezoelectric element), a drive rod 312, a fixed portion 311 (also called a counterweight) and a moving portion 314 ( Fig.13 The moving part 314 is not shown in the figure. Figure 8 and Fig. 9 The piezoelectric element 313 can be mounted on the fixing portion 311 , and the piezoelectric element 313 is suitable for generating mechanical vibration under the drive of voltage. One end of the driving rod 312 is fixed to the vibration surface of the piezoelectric element 313 . Fig.14A schematic diagram of a piezoelectric element and a corresponding driving rod 312 realizing a vibration conduction function is shown. Among them, the piezoelectric element 313 can be in the shape of a membrane (which can be called a tympanic membrane), and one end of the driving rod 312 is fixed to the center of the piezoelectric element 313. The piezoelectric element 313 can vibrate in the vertical direction under the drive of the voltage, thereby pushing the driving rod 312 to lift or fall. Further, the moving part 314 can be installed on the driving rod 312. In this embodiment, the piezoelectric drive assembly can be a piezoelectric assembly based on inertial drive. Specifically, in the non-working state of the piezoelectric element, the moving part 314 is fixed to the driving rod 312 by static friction. In terms of specific design, the moving part can have a through hole, and the driving rod passes through the through hole, and by selecting an appropriate manufacturing material, a static friction force can be formed between the through hole wall of the moving part and the outer side of the driving rod, and the static friction force is sufficient to support the weight of the moving part and the components such as the sleeve connected to the moving part, thereby ensuring that the relative position of the moving part and the driving rod remains unchanged in the non-working state of the piezoelectric element. When the piezoelectric element is in working state, by controlling the driving voltage, the piezoelectric element can be made to move upward relatively slowly, thereby pushing the driving rod to move upward relatively slowly. At this time, since the upward force on the driving rod is small, the static friction force of the contact surface between the moving part and the driving rod can still keep the moving part and the driving rod relatively fixed, so that the moving part rises with the rise of the driving rod. When the piezoelectric element reaches the highest point, the piezoelectric element can be made to move downward relatively quickly by controlling the driving voltage, thereby pulling the driving rod to move downward relatively quickly. At this time, since the downward force on the driving rod is large, the friction force of the contact surface between the moving part and the driving rod is not enough to keep the moving part and the driving rod relatively fixed, causing the driving rod to move downward relative to the moving part (at this time, the friction force of the contact surface between the moving part and the driving rod has actually been converted into dynamic friction). In other words, when the driving rod moves downward at a fast speed, the moving part will not fall with the descent of the driving rod, but will basically remain at the original height. When the piezoelectric element drops to the lowest point, the driving voltage drives the piezoelectric element to move slowly upward again, thereby pushing the moving part to rise again, and this cycle is repeated, so that the moving part can be pushed to rise continuously until it reaches the desired position. In general, the driving voltage can be set to control the piezoelectric element to rise slowly and fall sharply, so that the driving rod can drive the moving part to rise by the action of static friction when it rises, and the driving rod can overcome the dynamic friction and fall rapidly when it falls, so as to prevent the moving part from being brought down by the driving rod. In this way, the moving part is effectively lifted within one vibration cycle of the piezoelectric element. By repeatedly performing multiple vibration cycles, the moving part can be continuously lifted upward until it reaches the desired position. On the contrary, by setting the driving voltage to control the piezoelectric element to rise slowly and fall sharply, the moving part can be made to fall, and by repeatedly performing multiple vibration cycles, the moving part can be continuously lowered until it reaches the desired position.Based on the above principle, the moving part can move bidirectionally along the direction of the driving rod (for example, the vertical direction) under the control of the voltage signal, thereby realizing the extension and retraction of the sleeve. The above briefly describes the working principle of the piezoelectric component based on inertial drive. It should be noted that this application is not limited to this type of piezoelectric component. At the end of this article, more types of piezoelectric components will be introduced as examples.

[0069] In one embodiment of the present application, the housing 100 is rectangular in a top view. The telescopic optical actuator may have a plurality of piezoelectric drive devices 310. The plurality of piezoelectric drive devices 310 may be disposed in a corner area of ​​the housing 100, and the lens carrier 200 may be supported by the drive rods of the plurality of piezoelectric drive devices 310.

[0070] Further, still refer to Figure 1 In one embodiment of the present application, the driving device 300 may include a piezoelectric driving device 310 and an auxiliary guiding device 320. The structure and installation method of the piezoelectric driving device 310 may be consistent with the above-mentioned embodiment and will not be described in detail. In this embodiment, the auxiliary guiding device 320 may include a guide rod 321 (which may be combined with reference to Figure 8 ), the bottom of the guide rod 321 is fixed to the support seat 500, and the flat plate portion 220 of the lens carrier 200 is movably connected to the guide rod 321. In this embodiment, one or more of the driving rods 312 and one or more of the guide rods 321 jointly support the lens carrier 200. For example, the flat plate portion 220 of the lens carrier 200 can be jointly supported by one driving rod 312 and multiple guide rods 321, and these driving rods 312 and guide rods 321 can be respectively installed in the four corner areas of the housing 100 (referring to the four corner areas in a top view). It should be noted that the position of the guide rod is not limited to the four corner areas, and it is also possible to set it on the side of the flat plate portion 220 of the lens carrier 200. In a modified embodiment, the total number of the driving rods 312 and the guide rods 321 may not be four, for example, the total number may be three, and they can be respectively set in three corner areas of the four corner areas of the housing 100 (referring to the four corner areas in a top view). The present application may also include other modified embodiments, as long as the piezoelectric rod and the guide rod 321 can form a stable and reliable support for the flat plate portion 220 of the lens carrier 200 .

[0071] Furthermore, combined with reference Figure 1 and Figure 3In one embodiment of the present application, the driving device 300 may include a piezoelectric driving device 310 and an auxiliary guiding device 320. The flat plate portion 220 of the lens carrier 200 may have an adapting structure for mounting the piezoelectric driving device 310 and the auxiliary guiding device 320. The adapting structure may include a first adapting structure 231, a second adapting structure 232, and a third adapting structure 233. Figure 3 , Figure 8 and Fig. 9In this embodiment, the first adapter structure 231 can be used to install a metal clamping sheet, which can be bent to form an adapter hole, and the piezoelectric rod passes through the adapter hole. A friction piece can be arranged between the metal clamping sheet and the outer side surface of the piezoelectric rod, or the piezoelectric rod itself can be composed of a friction piece. In this way, the metal clamping sheet can be used as a moving part 314 to achieve axial movement based on friction relative to the piezoelectric rod. The axial direction here refers to the axial direction of the cylindrical part 210 of the lens carrier 200, that is, the optical axis direction of the optical lens 700. In this embodiment, the second adapter structure 232 and the third adapter structure 233 are both used to install the auxiliary guide device 320. The second adapter structure 232 can include two clamping arms, and an unclosed hole structure can be formed between the two clamping arms, and the guide rod 321 passes through the hole structure between the two clamping arms. In this way, the moving direction of the second adapter structure 232 is generally limited to the direction of movement along the guide rod 321, that is, the moving direction of the second adapter structure 232 is generally limited to the direction of axial movement. On the other hand, in this embodiment, the lens carrier is a plastic part, and the adapter structure of its flat plate portion 220 is also a plastic part. Since the hole-shaped structure of the second adapter structure 232 is not closed, the two clamping arms can have a certain deformation ability. This design can avoid the guide rod 321 and the second adapter structure 232 from being too tight, causing the flat plate portion 220 to be stuck on the guide rod 321. Further, in this embodiment, the center of the third adapter structure 233 can have a positioning hole. The support seat 500 can have a positioning column 322, which passes through the positioning hole upward and is movably connected to the third adapter structure 233. Among them, a ball bearing may be arranged between the hole wall of the positioning hole and the outer side surface of the positioning column 322, and the ball bearing may be provided in plurality and surround the positioning column 322 to support the hole wall of the positioning hole and the positioning column 322 in the radial direction. Here, the radial direction refers to the radial direction of the positioning column 322, that is, the direction perpendicular to the axis of the positioning column 322. This design can better improve the linearity of the movement of the lens carrier 200, and through the radial support of the ball bearing, the movement resistance of the lens carrier 200 can be reduced. In this embodiment, the flat plate portion 220 of the lens carrier 200 is provided with two different types of adapter structures to install the auxiliary guide device 320, wherein the second adapter structure 232 has a lower cost and is easy to assemble, and can be arranged at a diagonal position of the first adapter structure 231. The third adapter structure 233 can be arranged at a position close to the piezoelectric rod of the piezoelectric drive device 310, so as to better improve the linearity of the movement of the lens carrier 200 and reduce the movement resistance of the lens carrier 200.

[0072] Furthermore, combined with reference Figure 3 , Figure 8 and Fig. 9In one embodiment of the present application, the height of the third adapter structure 233 (i.e., the axial dimension of the third adapter structure 233) may be greater than the thickness of the flat plate portion 220. This facilitates the installation of the ball bearings and their receiving structures in the third adapter structure 233, thereby helping to improve the linearity of the movement of the lens carrier 200.

[0073] Furthermore, combined with reference Figure 3 , Figure 8 and Fig. 9 In one embodiment of the present application, a fourth adapter structure 234 is further provided in a corner area of ​​the flat plate portion 220 of the lens carrier 200, and the fourth adapter structure 234 is used to install a first position sensor 234a. The fourth adapter structure 234 may be plate-shaped (e.g., may be roughly rectangular plate-shaped) and its thickness direction is perpendicular to the thickness direction of the flat plate portion. The first position sensor 234a may be installed on the outward surface of the fourth adapter structure 234. The first position sensor 234a may be used to sense the movement of the lens carrier 200 relative to the support seat 500 or relative to the photosensitive component 600. A sensor bracket 235 may be provided in the corner area of ​​the support seat 500 corresponding to the first position sensor 234a, and the sensor bracket may be formed by extending upward from the upper surface of the support seat, for example. A second position sensor 235a is provided in the top area of ​​the sensor bracket 235. The position sensor may be a Hall element or other types of position sensors.

[0074] Further, in one embodiment, the sensor bracket 235 of the support seat 500 can be arranged at a position close to the fourth adapter structure 234 of the flat plate portion 220 of the lens carrier 200. A position sensing magnet is installed on the outer surface of the fourth adapter structure 234, and a second position sensor 235a (such as a Hall element) is arranged on the top area of ​​the sensor bracket 235. The second position sensor 235a senses the real-time position of the lens carrier by detecting the magnetic field change of the position sensing magnet. In this way, the position of the optical lens can be sensed in real time during the extension and retraction process. When the position sensor senses that the optical lens has been extended to the maximum height, the drive control program can adjust the drive voltage (or other drive signal) output to the piezoelectric drive device, thereby driving the optical lens carrier to perform position fine-tuning to perform the focusing action before shooting. Compared with the conventional sensing element driving the lens to slowly drive to the maximum position, the position sensor in this solution directly senses the maximum distance moved by the optical lens, and then performs the focusing action. This design can significantly improve the efficiency of driving the lens. In a specific implementation, an optical lens displacement value can be set as a lens extension threshold. When the position sensor senses that the movement distance of the lens carrier reaches the lens extension threshold, it is determined that the lens has extended out of the housing and reached a specified position (i.e., reached a fully extended state). After that, the driving voltage can be adjusted (for example, the driving voltage value is reduced, or the time for each application of the driving voltage is shortened) to fine-tune the optical lens in the z-axis direction, thereby achieving a focusing function.

[0075] Further, refer to Figure 3 In one embodiment of the present application, the outer side surface of the lens barrel of the optical lens 700 may have a thread, and correspondingly, the inner side surface of the cylindrical portion 210 of the lens carrier 200 may also have a thread adapted thereto. The optical lens 700 may be threadedly connected to the cylindrical portion 210 of the lens carrier 200. In another embodiment, the optical lens 700 may be threadedly connected to the cylindrical portion 210 of the lens carrier 200, and a glue material is poured into the gap between the outer side surface of the optical lens 700 and the inner side surface of the cylindrical portion 210 of the lens carrier 200, thereby reinforcing the threaded connection and enhancing the dustproof and waterproof effect of the telescopic camera module. The connection method between the optical lens 700 and the lens carrier 200 is not limited to the above two methods. For example, in other embodiments, the optical lens 700 and the lens carrier 200 may also be connected and fixed only by glue or buckles.

[0076] Furthermore, in some embodiments of the present application, the partition assembly is used to isolate the internal space of the telescopic camera module from the outside world to prevent dust from penetrating through the gap between the lens carrier and the wall of the light-through hole of the shell. Fig.15A cross-sectional perspective view of a mold for making a partition component and the partition component made in one embodiment of the present application is shown. Fig.16 The figure shows a mold for making a partition component and a stereoscopic schematic diagram of the partition component made in one embodiment of the present application. Fig.15 and Fig.16 In one embodiment of the present application, the partition assembly 400 can be made into the corrugated partition membrane by a molding process, and the mold 431 used can have a corrugated side wall 431a, so that the partition membrane 430 is directly formed into a corrugated shape (that is, the partition membrane 430 can have a plurality of bending sections 432 that are supported by the side wall 431a of the mold 431). This partition membrane 430 directly formed into a corrugated shape has good elasticity and reliability. During molding, the topmost bending section 432a and the bottommost bending section 432b of the partition membrane 430 can be further configured to be horizontal so as to be installed on the first annular sheet 410 and the second annular sheet 420. In one embodiment, the partition membrane 430 can be supported by the mold 431, and then the first annular sheet 410 and the second annular sheet 420 are respectively pasted to the topmost bending section 432a and the bottommost bending section 432b thereof.

[0077] Of course, in other embodiments, a cylindrical separator membrane may be first manufactured, and then the separator membrane may be bent into a corrugated shape using a jig having a corrugated sidewall. The top and bottom surfaces of the jig may be horizontal surfaces, so that the topmost bending section and the bottommost bending section of the separator membrane are configured in a horizontal state. Then, the first annular sheet and the second annular sheet are respectively attached to the topmost bending section and the bottommost bending section of the separator membrane.

[0078] Furthermore, in a series of embodiments of the present application, a telescopic camera module based on the aforementioned optical actuator is also provided, which includes an optical actuator, an optical lens 700 and a photosensitive component 600. The optical actuator may be the telescopic optical actuator described in any of the embodiments above. The optical lens 700 is mounted on the inner side of the cylindrical portion 210 of the lens carrier. The photosensitive component 600 is mounted below the optical actuator, and the photosensitive chip of the photosensitive component 600 is arranged below the light hole of the housing 100 and the optical lens 700.

[0079] Furthermore, in some embodiments of the present application, the photosensitive component of the camera module has a chip OIS anti-shake function, so as to compensate for the shaking of the camera module or the intelligent terminal device (such as a mobile phone) by the lateral movement of the photosensitive chip (lateral in this article refers to the direction perpendicular to the optical axis). In the existing camera module, the anti-shake function is usually set at the lens end, and with the improvement of the lens quality (for example, glass lenses replace plastic lenses, and the use of periscope lenses will increase the lens quality), the driving force provided by the traditional motor will be insufficient, and the accuracy of the anti-shake adjustment will also be affected. For the retractable lens assembly (that is, the assembly formed after the optical lens is installed in the retractable optical actuator), its mass will be further increased. In some embodiments of the present application, the anti-shake problem during the shooting process of the module is solved by driving the lateral movement of the photosensitive chip, which can reduce the driving force requirements for the anti-shake driving element. At the same time, since the retractable lens assembly itself does not need to consider the anti-shake problem, the structure of the retractable lens assembly can be simplified (especially the structure of its optical actuator), which is conducive to the miniaturization of the camera module.

[0080] In the prior art, there are many implementation schemes of piezoelectric drive components. Fig.14 ) A brief description of the piezoelectric drive assembly is given by taking the Tula scheme as an example. For more detailed implementation details of the Tula scheme, reference may be made to CN204993106U and CN105319663A. In the present application, the piezoelectric drive assembly may also adopt other types of piezoelectric drive schemes other than the Tula scheme, such as a multilayer piezoelectric component scheme, a USM scheme, etc. The implementation details of the linear actuation scheme may refer to CN107046093B, and the implementation details of the USM scheme may refer to CN10109301B. The common feature of the above piezoelectric drive schemes is that these piezoelectric drive assemblies all have a fixed portion, a piezoelectric element mounted on the fixed portion, a driving rod (the top or bottom end of the driving rod is mounted on the piezoelectric element), and a moving portion mounted on the driving rod and movable along the driving rod. The moving portion may be formed separately or may be integrally formed with a driven object (such as a driven sleeve).

[0081] Among them, the Tula solution and the multi-layer piezoelectric solution are both linear actuation solutions. They have the advantages of small size, large thrust, and high precision, and the driving structure is relatively simple. They are suitable for driving heavier products, adapting to the product trends of large image planes and glass lenses in camera modules, and are used for chip anti-shake, prism anti-shake and other purposes. Among them, the multi-layer piezoelectric solution has a smaller piezoelectric element area than the Tula solution (the piezoelectric element is disc-shaped when viewed from a top angle, and the area here refers to the disc area), so it helps to reduce the radial size of the sleeve optical actuator and the corresponding camera module (the radial size is the size in the direction perpendicular to the optical axis). Compared with the multi-layer piezoelectric solution, the piezoelectric element of the Tula solution has a smaller thickness, that is, a smaller axial size (the axial size is the size in the direction parallel to the optical axis), which helps to reduce the axial size of the sleeve optical actuator and the corresponding camera module. In addition, the circuit of the multi-layer piezoelectric solution extends through the side of the base of the linear actuator, and the circuit is relatively simple, which is suitable for use in modules with compact space.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. An optical actuator, characterized in that: include: The shell has a shell light-through hole at the top; A lens carrier, comprising a cylindrical portion and a flat plate portion extending outward from the bottom of the cylindrical portion, wherein the flat plate portion is in a closed ring shape and surrounds the outer circumference of the cylindrical portion; A driving device, which is suitable for driving the lens carrier to move relative to the housing along the axis of the cylindrical portion, and the cylindrical portion is suitable for extending from the housing light hole or retracting into the housing under the action of the driving device; as well as A partition assembly, the top of which is connected to the lower surface of the top cover of the shell; the partition assembly includes a cylindrical partition membrane and a second annular sheet connected to the bottom of the partition membrane, the partition membrane surrounds the cylindrical portion, and the cylindrical wall of the partition membrane is folded into a corrugated shape, so that it is suitable for expansion and contraction in the axial direction of the cylindrical portion; The closed ring-shaped flat plate portion of the lens carrier has a flat upper surface suitable for supporting the second annular sheet, and the partition assembly is connected to the upper surface of the flat plate portion through the bottom surface of the second annular sheet.

2. The optical actuator according to claim 1, characterized in that The separation component further comprises a first annular sheet, which is connected to the top of the separation membrane; the top surface of the first annular sheet is connected to the lower surface of the top cover of the shell.

3. The optical actuator according to claim 2, characterized in that: The top surface of the first annular sheet is bonded to the lower surface of the top cover of the shell by waterproof glue; the bottom surface of the second annular sheet is bonded to the upper surface of the flat plate portion by waterproof glue.

4. The optical actuator according to claim 3, characterized in that: The waterproof glue is arranged between the bottom surface of the second annular sheet and the upper surface of the flat plate portion, and between the inner side surface of the second annular sheet and the outer side surface of the cylindrical portion.

5. The optical actuator according to claim 1, wherein: An annular gap is provided between the top cover of the shell and the cylindrical portion, and the width of the annular gap in the radial direction is 0.05-0.2 mm.

6. The optical actuator according to claim 1, characterized in that: The cylindrical wall of the partition film does not contact the cylindrical portion in a completely folded state.

7. The optical actuator according to claim 1, characterized in that: The inner side surface of the cylindrical portion is suitable for installing an optical lens; the top of the cylindrical portion has a step structure, and a light-transmitting cover is installed on the step structure and encapsulates the optical lens inside the cylindrical portion.

8. The optical actuator according to claim 7, characterized in that: The step structure includes an annular horizontal step surface and an annular side wall, and the bottom surface of the light-transmitting cover sheet is fixed to the annular horizontal step surface by waterproof glue.

9. The optical actuator according to claim 8, characterized in that: The waterproof glue is also arranged in the gap between the light-transmitting cover plate and the annular side wall of the step structure.

10. The optical actuator according to claim 1, wherein: The driving device is a piezoelectric driving device.

11. The optical actuator according to claim 10, characterized in that: The optical actuator also includes a support seat connected and fixed to the shell, and the piezoelectric drive device includes a fixed part, a drive rod, a piezoelectric element and a moving part, the fixed part is fixed to the support seat, the moving part is fixed to the flat plate part, one end of the drive rod is fixed to the piezoelectric element, and the axial direction of the drive rod is parallel to the axial direction of the cylindrical part; the moving part is movably connected to the drive rod through a friction member, and the piezoelectric element is installed on the fixed part and is suitable for vibrating in the direction of the axial line of the drive rod to drive the moving part to move relative to the drive rod along the axial line of the drive rod.

12. The optical actuator according to claim 2, characterized in that: The optical actuator also includes a support base connected and fixed to the shell, the support base is located at the bottom of the shell, and the support base has a central light hole; the first annular sheet and the second annular sheet are made of rubber, metal or plastic; the separation membrane is made of PTFE.

13. The optical actuator according to claim 11, characterized in that In a top view, the housing is rectangular, a plurality of the piezoelectric drive devices are arranged in a corner area of ​​the housing, and the lens carrier is supported by the drive rods of the plurality of the piezoelectric drive devices.

14. The optical actuator according to claim 11, characterized in that: The driving device also includes an auxiliary guiding device, which includes a guide rod whose axis is parallel to the driving rod, the bottom of the guide rod is fixed to the supporting seat, and the flat plate portion of the lens carrier is movably connected to the guide rod; one or more driving rods and one or more guide rods jointly support the lens carrier.

15. The optical actuator according to claim 11, characterized in that: The flat plate portion has a first adapting structure, the moving portion is a metal clamping sheet, the metal clamping sheet is installed on the first adapting structure, the metal clamping sheet forms a through hole, and the driving rod passes through the through hole.

16. The optical actuator according to claim 15, characterized in that The flat plate portion also has a second adapter structure, which includes two clamping arms, an unclosed hole structure is formed between the two clamping arms, a guide rod passes through the hole structure, the axis of the guide rod is parallel to the driving rod, and the bottom of the guide rod is fixed to the support seat.

17. The optical actuator according to claim 15, characterized in that The flat plate portion also has a third adapter structure, the center of which has a positioning hole, and the support seat has a positioning column, which passes upward through the positioning hole and is movably connected to the third adapter structure; wherein a ball is arranged between the hole wall of the positioning hole and the outer side surface of the positioning column, and the ball is in plurality and surrounds the positioning column.

18. A camera module, characterized in that: include: The optical actuator according to any one of claims 1 to 17; An optical lens, which is mounted on the inner side surface of the cylindrical portion of the lens carrier; as well as A photosensitive component is installed below the optical actuator, and a photosensitive chip of the photosensitive component is arranged below the light through hole of the shell and the optical lens.

Images