Prism driving device, camera module and electronic device

Abstract

The utility model relates to a kind of prism driving device, camera module and electronic equipment, including pedestal, and the dynamic frame of being located in pedestal and rotating relative to pedestal, prism driving device further include motion holding component and magnetic attraction fixed component, motion holding component is at least partially placed in accommodating groove, accommodating groove is located in base and / or dynamic frame, at least part of magnetic attraction fixed component is located in pedestal, the remaining part of magnetic attraction fixed component is located in dynamic frame, motion holding component and accommodating groove are distributed along emergent optical axis and at least part of magnetic attraction fixed component and the remaining part are mutually magnetically attracted along emergent optical axis.Optical axis is distributed along emergent optical axis from structure to motion holding component and accommodating groove, while magnetic attraction fixed component is mutually magnetically attracted along emergent optical axis, for dynamic frame provides in optical axis direction stability, significantly improves the motion precision and control stability of mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of electronic imaging, and in particular relates to a prism driving device, a camera module and an electronic device. Background Technology

[0002] Miniature cameras used in mobile phones generally employ large-size image sensors because they can capture more light and provide richer details and colors, and are widely used to improve the imaging quality of mobile phones.

[0003] The image stabilization and head-nodding components in periscope motors require high precision. In existing technologies, the head-nodding component is located inside the head-shaking component, which can easily cause crosstalk problems and affect the imaging effect. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems by providing a prism driving device, camera module, and electronic device that can solve the above-mentioned technical issues.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A prism driving device includes a base and a movable frame disposed within the base and rotating relative to the base. The prism driving device further includes a motion holding assembly and a magnetic attraction fixing assembly. The motion holding assembly is at least partially placed in a receiving groove, which is disposed in the base and / or the movable frame. At least part of the magnetic attraction fixing assembly is disposed in the base, and the remaining part of the magnetic attraction fixing assembly is disposed in the movable frame. The motion holding assembly and the receiving groove are distributed along the output optical axis, and at least part and the remaining part of the magnetic attraction fixing assembly are magnetically attracted to each other along the output optical axis.

[0006] Furthermore, the motion retaining component is any one of a ball bearing or a roller, and the motion retaining component is integrally formed with either the base or the moving frame, or the motion retaining component is separately provided with the base and the moving frame respectively.

[0007] Furthermore, the moving frame is provided with two swivel arms, which are symmetrically distributed about the emitted optical axis, and at least a portion of the swivel arms are placed in the clearance hole of the base.

[0008] Furthermore, at least a portion of the clearance hole extends along a direction perpendicular to the emitted optical axis and forms an opening on the base.

[0009] Furthermore, each of the swivel arms is provided with a receiving groove, and several of the receiving grooves are located on the same axis.

[0010] Furthermore, at least a portion of the magnetic fixing assembly is disposed on the base sidewall perpendicular to the emitted optical axis, and the remaining portion of the magnetic fixing assembly is disposed on the moving frame sidewall perpendicular to the emitted optical axis.

[0011] Furthermore, the magnetic attraction fixing assembly has two sets, which are symmetrically distributed on both sides of the emitted optical axis.

[0012] Furthermore, the prism driving device also includes a carrier disposed within the base and rotating relative to the moving frame for supporting the prism, wherein the moving frame rotates relative to the base about an axis perpendicular to the X-axis, and the carrier rotates relative to the moving frame about the X-axis.

[0013] As an application solution, this application also provides a camera module, which includes the aforementioned prism driving device.

[0014] As an application solution, this application also provides an electronic device, which includes the aforementioned camera module.

[0015] Compared with existing technologies, the advantages of this application are: the motion holding components and the receiving groove are distributed along the output optical axis, which structurally avoids mutual interference of motion. At the same time, the magnetic fixing components magnetically attract each other along the output optical axis, providing the moving frame with stability in the optical axis direction, significantly improving the motion accuracy and control stability of the mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main assembly of the lens driving device of this utility model; Figure 2 An exploded view of the main assembly of the lens driving device of this utility model; Figure 3 Two exploded schematic diagrams of the main body assembly of the lens driving device of this utility model; Figure 4 Three exploded view diagrams illustrating the main assembly of the lens driving device of this utility model; Figure 5 Four exploded schematic diagrams of the main body assembly of the lens driving device of this utility model; Figure 6 This is a schematic diagram illustrating an example of an electronic device in Example 4.

[0017] In the figure, there is a base 1, a clearance hole 11, a moving frame 2, a rotating support arm 21, a carrier 3, a motion holding assembly 4, a receiving groove 5, a magnetic fixing assembly 6, an outgoing optical axis X, a first driving assembly S1, and a second driving assembly S2. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] Example 1

[0023] like Figures 1-2 As shown, the prism driving device includes a base 1 and a movable frame 2 disposed within the base 1. The movable frame 2 rotates relative to the base 1 under the drive of the first driving component S1. In this embodiment, the prism driving device further includes a motion holding component 4, which is at least partially placed in a receiving groove 5. The receiving groove 5 is disposed on the base 1 and / or the movable frame 2. In this embodiment, the receiving groove 5 is provided on both the base 1 and the movable frame 2. The motion holding component 4 is any one of a ball bearing or a roller. In this embodiment, as shown... Figure 2 and Figure 4 The motion holding component 4 shown is in the form of a ball bearing. In this solution, it is assembled in a groove-ball-groove manner along the X direction of the outgoing optical axis as shown in the figure. Furthermore, this design, combined with magnetic preload, reduces crosstalk and makes the nodding motion of the device more precise.

[0024] As an alternative, the motion retaining component 4 can be integrally formed with either the base 1 or the moving frame 2, or it can be separately formed with both the base 1 and the moving frame 2. When the motion retaining component 4 is integrally formed with either the base 1 or the moving frame 2, the advantage lies in the overall structural integrity and high rigidity. The integrated design eliminates assembly gaps between components, providing stable and precise motion guidance. Simultaneously, this solution reduces the number of parts, simplifies the assembly process, and helps reduce production costs. Furthermore, since there are no independent ball bearings to install and fix, it also exhibits better reliability in resisting high-frequency vibration and impact.

[0025] When the motion holding assembly 4 is separately configured from the base 1 and the moving frame 2, i.e., using independent ball bearings or rollers, the advantages lie in maintainability and flexibility. If wear occurs after long-term use, it can be easily replaced, thereby extending the service life of the entire device.

[0026] In the above structure, the main function of the motion retaining component 4 is to reduce the friction between the moving frame 2 and the base 1, and to ensure the stability and smoothness of the moving frame 2 during rotation. When the first drive component S1 drives the moving frame 2, the motion retaining component 4 rolls within the receiving groove 5, thereby reducing motion resistance.

[0027] Furthermore, to ensure that the motion holding assembly 4 always remains in contact with the receiving groove 5, the prism driving device also includes a magnetic fixing assembly 6. At least a portion of the magnetic fixing assembly 6 is disposed on the base 1, and the remaining portion of the magnetic fixing assembly 6 is disposed on the moving frame 2. The motion holding assembly 4 and the receiving groove 5 are distributed along the output optical axis X, and at least a portion and the remaining portion of the magnetic fixing assembly 6 are magnetically attracted to each other along the output optical axis X. The magnetic attraction force along the output optical axis X can provide a continuous and stable preload force for the moving frame 2, thereby ensuring that the motion holding assembly 4 is tightly pressed between the base 1 and the receiving groove 5 of the moving frame 2. This effectively eliminates the slight shaking and gap of the moving frame 2 in the non-driving direction, which not only improves the smoothness and accuracy of the rotational motion, but also enhances the device's ability to resist external impacts and vibrations.

[0028] Specifically, the magnetic fixing assembly 6 includes a magnet disposed on the base 1 and a magnet disposed on the moving frame 2. The north and south poles of the same group of magnets are distributed opposite each other and attract each other. At least a portion of the magnetic fixing assembly 6 is disposed on the side wall of the base 1 perpendicular to the output optical axis X, and the remaining portion of the magnetic fixing assembly 6 is disposed on the side wall of the moving frame 2 perpendicular to the output optical axis X. The magnetic fixing assembly 6 has two sets, and the two sets of magnetic fixing assemblies 6 are symmetrically distributed on both sides of the output optical axis X.

[0029] To better support the moving frame 2 and improve rotation efficiency, a swivel arm 21 is also provided on the moving frame 2. There are two swivel arms 21, symmetrically distributed on both sides of the moving frame 2 about the output optical axis X. Meanwhile, the base 1 is also provided with... Figures 1-3 The avoidance hole 11 shown is provided, and at least a portion of the rotating arm 21 is placed in the avoidance hole 11 of the base 1, further reducing the lateral width of the device. The aforementioned receiving groove 5 is provided on the side wall of the avoidance hole 11 and at least a portion of the rotating arm 21, respectively. The receiving groove 5 provided on the rotating arm 21 is on the same axis, and the receiving groove 5 provided on the avoidance hole 11 is on the same axis. At least a portion of the avoidance hole 11 extends along a direction perpendicular to the output optical axis X and forms an opening on the base 1. In this embodiment, the avoidance hole 11 extends along the incident optical axis direction perpendicular to the output optical axis X and forms an opening at the top edge of the base 1, and is used to allow the rotating arm 21 to be placed into the avoidance hole 11 from the opening along the incident optical axis direction. The avoidance hole 11 extends through the side wall of the base 1 along a direction that is perpendicular to both the output optical axis X and the incident optical axis.

[0030] When the receiving grooves 5 on both are aligned, a precise spherical rolling space is formed, which allows the motion holding component 4 to roll smoothly inside, greatly suppressing undesirable radial movement and yaw, thereby improving the accuracy and stability of rotation.

[0031] Example 2

[0032] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the prism driving device of Embodiment 1, this embodiment describes other main components of the prism driving device.

[0033] The prism driving device also includes a carrier 3 disposed within the base 1 and rotating relative to the moving frame 2 to support the prism. The carrier 3 is disposed within the moving frame 2 and supported by the moving frame 2. The moving frame 2 rotates relative to the base 1 about an axis perpendicular to the X-axis, and the carrier 3 rotates relative to the moving frame 2 about the X-axis. Between the carrier 3 and the moving frame 2, a plurality of balls or rollers distributed along the outgoing light axis X are provided for support. Similar to the motion holding assembly 4 in Embodiment 1, the balls or rollers can be integrally formed with the moving frame 2 or the carrier 3, or they can be separately disposed. A magnetic attraction component is provided between the carrier 3, with the magnetic attraction direction along the incident optical axis. This component has the same function as the magnetic attraction fixing component 6 in Embodiment 1, which not only fixes the carrier but also prevents crosstalk between the balls or rollers. At least a portion of the magnetic attraction component is located on the carrier 3, and the remaining portion is located on the moving frame 2. The at least portion and the remaining portion of the magnetic attraction component are magnetically attracted at intervals along the incident optical axis. To maintain balance, the magnetic attraction component can be distributed along the axial direction of the central axis between the moving frame 2 and the carrier 3, or symmetrically distributed on both sides of the central axis about the central axis.

[0034] The first drive assembly S1 drives the moving frame 2 to rotate relative to the base 1, forming a nodding motion around an axis that is perpendicular to both the outgoing optical axis X and the incoming optical axis. Meanwhile, the carrier 3, driven by the second drive assembly S2, rotates relative to the moving frame 2, forming a head-shaking motion around the outgoing optical axis X. The ball bearings or rollers between the carrier 3 and the moving frame 2 serve as a second motion-holding assembly, effectively supporting the weight of the carrier 3 and reducing frictional resistance during rotation, enabling the carrier 3 to achieve high-precision, low-interference rotation around the outgoing optical axis X.

[0035] like Figure 2 As shown, at least a portion of the first driving component S1 is disposed on the base 1, and the remaining portion is disposed on the moving frame 2. To optimize the spatial layout and make the device smaller, the driving coil of the first driving component S1 is arranged as follows: Figure 2 The device shown is positioned at the bottom, with the driving magnet of the first driving component S1 located at the bottom of the moving frame 2 and spaced apart from the driving coil. Simultaneously, at least a portion of the second driving component S2 is located on the base 1, and the remaining portion is located on the carrier 3. Similarly, the layout is optimized, with the driving coil of the second driving component S2 located at... Figure 2 The device shown has driving magnets and driving coils spaced apart on both sides of the carrier 3.

[0036] Example 3

[0037] The structure and principle of this embodiment are basically the same as those of Embodiment 1 and Embodiment 2. The difference is that, in relation to the prism driving device of Embodiment 1 and Embodiment 2, the camera module of this embodiment includes a prism driving device.

[0038] A camera module is a precision optical component that uses electronic control to adjust the position or shape of lenses to alter the focusing and imaging of light. These modules are widely used in cameras, laser devices, and other applications, enabling functions such as autofocus, optical zoom, and image stabilization, thereby improving image quality and system performance.

[0039] Example 4

[0040] The structure and principle of this embodiment are basically the same as those of Embodiment 3. The difference lies in that, in relation to the camera module of Embodiment 3, the electronic device in this embodiment includes a camera module.

[0041] like Figure 6 As shown, electronic devices refer to those devices that rely on electronic technology to perform specific functions, such as processing signals, data, or converting energy. They are widely used in fields such as communication, computing, entertainment, and industrial control, including but not limited to smartphones, computers, televisions, audio systems, and medical instruments, which greatly improve the convenience and efficiency of modern life.

[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A prism driving device comprising a base (1) and a moving frame (2) arranged in the base (1) and rotatable relative to the base (1), characterized in that, The prism driving device further includes a motion holding assembly (4) and a magnetic fixing assembly (6). The motion holding assembly (4) is at least partially placed in a receiving groove (5), which is located on the base (1) and / or the moving frame (2). At least part of the magnetic fixing assembly (6) is located on the base (1), and the remaining part of the magnetic fixing assembly (6) is located on the moving frame (2). The motion holding assembly (4) and the receiving groove (5) are distributed along the output optical axis (X), and at least part and the remaining part of the magnetic fixing assembly (6) are magnetically attracted to each other along the output optical axis (X).

2. The prism driving device according to claim 1, characterized by The motion retaining component (4) is either a ball or a roller. The motion retaining component (4) is integrally formed with either the base (1) or the moving frame (2), or the motion retaining component (4) is separately set with the base (1) and the moving frame (2).

3. The prism driving device according to claim 1 or 2, characterized in that, The moving frame (2) is provided with a rotating arm (21), and there are two rotating arms (21). The two rotating arms (21) are symmetrically distributed about the outgoing optical axis (X), and at least a portion of the rotating arms (21) is placed in the clearance hole (11) of the base (1).

4. The prism driving device according to claim 3, characterized in that, At least a portion of the clearance hole (11) extends along a direction perpendicular to the outgoing optical axis (X) and forms an opening on the base (1).

5. The prism driving device according to claim 3, characterized in that, Each of the rotating arms (21) is provided with a receiving groove (5), and several of the receiving grooves (5) are located on the same axis.

6. The prism driving device according to claim 1, characterized in that, At least a portion of the magnetic fixing assembly (6) is disposed on the side wall of the base (1) perpendicular to the emitted optical axis (X), and the remaining portion of the magnetic fixing assembly (6) is disposed on the side wall of the moving frame (2) perpendicular to the emitted optical axis (X).

7. The prism driving device according to claim 1 or 6, characterized in that, The magnetic fixing component (6) has two sets, and the two sets of magnetic fixing components (6) are symmetrically distributed on both sides of the emitted optical axis (X).

8. The prism driving device according to claim 1, characterized in that, The prism driving device further includes a carrier (3) disposed in the base (1) and rotating relative to the moving frame (2) for carrying the prism. The moving frame (2) rotates relative to the base (1) about an axis perpendicular to the X-axis, and the carrier (3) rotates relative to the moving frame (2) about the X-axis.

9. A camera module, characterized in that, The camera module includes the prism driving device as described in any one of claims 1-8.

10. An electronic device, characterized in that, The electronic device includes the camera module as described in claim 9.

Images