Camera module anti-shake mechanism

Abstract

The utility model relates to the field of camera module anti -shake, disclose a camera module anti -shake mechanism, the present scheme constructs stable support plane through three point distribution's ball, utilizes three point fixed surface principle to make mobile support stress even, avoids structural deformation, promotes anti -shake mechanism stability and service life, the cooperation of magnetism and magnet piece makes mobile support and outer frame closely adhere, ball rolling contact reduces friction resistance greatly, guarantees reliable and removes the smoothness of connection without jamming, coil drive can accurate control mobile support horizontal displacement, responds to the jitter and accurate compensation quickly, effectively offsets the lateral shaking, improves imaging definition greatly, satisfies the scene demand such as high -definition shooting, dynamic snapshot, compared with traditional mechanical anti -shake structure adjustment precision is higher, response speed is faster.

Description

Technical Field

[0001] This utility model relates to the field of camera image stabilization, specifically to a camera module image stabilization mechanism. Background Technology

[0002] Camera modules are indispensable components in current smartphones and other smart devices. To ensure clear images, camera modules typically require image stabilization. Currently, the most common OIS (Optical Image Stabilization) solutions used in smartphones rely on VCM (Vibration Control Center) motors to drive the lens for angle correction. However, with the improvement of photography performance in smart devices and the development of telephoto lenses, lens modules are becoming increasingly heavy, placing higher demands on motors. Conventional motors struggle to achieve good image stabilization, and relying solely on motor components for angle correction is insufficient for achieving wide-range, high-precision image stabilization. Therefore, a camera module that can provide wide-range and stable image stabilization even for heavy lenses is needed. Utility Model Content

[0003] The present invention aims to provide a camera module anti-shake mechanism to solve the problem of unstable camera anti-shake.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a camera module anti-shake mechanism, comprising a housing mounted on the camera body, the housing including a base connected to the camera body and an outer frame connected to the base, a movable bracket and an image sensor disposed between the base and the outer frame inside the housing, the movable bracket and the image sensor being linked, a plurality of protrusions being provided on the side of the movable bracket facing the outer frame, the number of protrusions being no less than three, and at least three protrusions having mounting grooves respectively, each mounting groove containing a ball, the three mounting grooves being distributed at three points on the plane of the movable bracket, the ball in the three mounting grooves forming a support plane; a plurality of magnets being provided on the side of the outer frame near the movable bracket, and a plurality of magnetic iron plates corresponding to the magnets being provided on the side of the movable bracket away from the outer frame, the movable bracket abutting against the outer frame through the ball under the action of the magnetic iron plates and magnets; a plurality of sets of coils being wound on the movable bracket, the plurality of sets of coils being disposed on the side of the movable bracket near the outer frame and corresponding to the magnets, the movable bracket being driven to move horizontally within the housing by changing the direction of the coil current.

[0005] The beneficial effects of this solution are as follows: A stable support plane is constructed using three-point distributed ball bearings. The mechanical principle of three-point plane fixation ensures uniform force distribution on the moving bracket during movement, effectively preventing structural deformation caused by localized stress concentration and improving the overall structural stability and service life of the image stabilization mechanism. The combination of the magnetic iron plate and the magnet allows the moving bracket to form a close-fitting moving relationship with the outer frame. Simultaneously, the rolling contact method of the ball bearings significantly reduces frictional resistance between the two, ensuring both connection reliability and smooth adjustment of the moving bracket during image stabilization, preventing jamming that could affect the stabilization effect. The coil drive structure achieves horizontal displacement adjustment of the moving bracket by precisely controlling the current direction, enabling rapid response to shake signals and precise compensation for minute displacements. This effectively counteracts lateral shaking generated during shooting, significantly improving the image clarity of the camera module and meeting the needs of high-definition shooting, dynamic capture, and other scenarios. Compared to traditional mechanical image stabilization structures, it offers higher adjustment precision, faster response speed, and a wider range of applications.

[0006] Preferably, as an improvement, the outer frame is provided with a sliding groove corresponding to the ball bearing, the sliding groove being used for the ball bearing to embed and roll.

[0007] The beneficial effects are as follows: by setting a sliding groove corresponding to the ball bearing on the outer frame, a dedicated limiting rolling trajectory is provided for the ball bearing, which can constrain the range of motion of the ball bearing and avoid problems such as deviation, falling off or misalignment of the ball bearing during rolling. This ensures that the moving bracket always moves smoothly along the preset direction and reduces the impact of unexpected displacement on the anti-shake accuracy.

[0008] Preferably, as an improvement, the sum of the depth of the sliding groove and the depth of the mounting groove is less than the diameter of the ball.

[0009] The beneficial effects are as follows: setting the sum of the depth of the sliding groove and the depth of the mounting groove to be less than the diameter of the ball bearing ensures that the ball bearing can maintain stable contact with both the inner wall of the mounting groove and the inner wall of the sliding groove after assembly. Since the mounting groove is opened on the protrusion and the top of the protrusion protrudes from the plane of the moving bracket, this design ensures that the top side wall of the protrusion will not directly abut against the outer frame, so that the moving bracket will not be hindered during movement and can ensure the stability of anti-shaking.

[0010] Preferably, as an improvement, the number of balls in the mounting groove is set to three, both the sliding groove and the mounting groove are circular, and the diameter of both the sliding groove and the mounting groove is twice the diameter of the balls.

[0011] The beneficial effects are as follows: Based on the principle of three-point plane mechanics, the three balls in the mounting groove achieve a stable support effect with the fewest possible parts. The three balls can form a planar triangular support in the sliding groove and the mounting groove. Through the design of the shape and size of the sliding groove, it can be ensured that the three balls are tangent to each other when placed in the sliding groove and the mounting groove, and each ball is tangent to the groove wall. This ensures the stability of the support and prevents the balls from shaking due to the excessive size of the groove. In other words, the three balls are stably embedded in the annular grooves (mounting groove and sliding groove) on the upper and lower sides, which can limit the axial displacement of the balls and achieve flexible movement in the plane through the rolling of the balls. With the stability characteristics of the triangular support, the component is guaranteed to be subjected to balanced force and reliable position during movement, while reducing frictional resistance and improving the smoothness and accuracy of the mechanism's movement.

[0012] Preferably, as an improvement, the outer frame is provided with a bayonet for mounting a lens, and the lens is detachably connected to the outer frame through the bayonet.

[0013] Preferably, as an improvement, the base is provided with a flexible circuit board, the movable bracket is elastically connected to the base through the flexible circuit board, the movable bracket is arranged in a hollow rectangle, and the image sensor is disposed on the flexible circuit board.

[0014] Preferably, as an improvement, the flexible circuit board includes an inner board and an outer board, the outer board is also hollow rectangular, the inner board is located at the center of the outer board, a cantilever connects the outer board and the inner board, the outer board is fixedly connected to the base, and the inner board is connected to the movable bracket; the image sensor is disposed on the inner board. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of the present invention and the lens mounting. Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the present utility model; Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 4 This is an exploded view of the flexible circuit board and movable support structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of an additional structure for an embodiment of this utility model. Detailed Implementation

[0016] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: housing 1, outer frame 11, magnet 111, bayonet 112, sliding groove 113, base 12, reinforcing steel sheet 121, lens 13, movable bracket 2, protrusion 21, mounting groove 211, ball bearing 2111, winding post 22, coil 221, magnetic iron sheet 23, flexible circuit board 3, inner plate 31, image sensor 311, bracket 312, filter 3121, outer plate 32, and cantilever 33.

[0017] Example The basic implementation examples are as follows: Figures 1-5 As shown, Figures 1-2 The image stabilization mechanism of the camera module shown includes a housing 1, a movable bracket 2 disposed within the housing 1, a flexible circuit board 3, and an image sensor 311 disposed on the flexible circuit board 3. The housing 1 includes an outer frame 11 and a base 12. The base 12 is used to connect to the camera body, and the outer frame 11 is connected to the base 12. Multiple buckles are provided on both sides of the base 12, and the base 12 and the outer frame 11 are connected by the buckles. The base 12 is made of steel. A bayonet 112 is provided at the end of the outer frame 11 away from the base 12, and a lens 13 is detachably connected to the bayonet 112. The flexible circuit board 3 is disposed on the base 12. The flexible circuit board 3 includes an outer plate 32 fixedly connected to the base 12. A reinforcing steel sheet 121 is fixedly disposed on the base 12. The reinforcing steel sheet 121 is located between the flexible and the flexible circuit board 3. Between the outer plate 32 and the base 12 of the flexible circuit board 3, the flexible circuit board 3 also includes an inner plate 31 elastically connected to the outer plate 32. The outer plate 32 is a hollow rectangular frame, and the inner plate 31 is a rectangular frame, which is located within the rectangular frame of the outer plate 32. A cantilever 33 connects the inner plate 31 and the outer plate 32. The outer periphery of the inner plate 31 is connected to the movable bracket 2. An image sensor 311 is provided at the middle position on the inner plate 31. A bracket 312 is also provided on the inner plate 31 at the image sensor 311. A filter 3121 is installed at the top of the bracket 312. The filter 3121 is located directly above the image sensor 311. The filter 3121 can effectively filter infrared light to the image sensor 311 and reduce the influence of infrared light on the imaging quality.

[0018] like Figure 2 and Figure 5 As shown, the outer frame 11 is arranged in a "cover" shape, and the outer frame 11 and the base 12 are connected by a snap-fit ​​to form a cavity inside. Four sets of magnets 111 are nested inside the outer frame 11 near the movable bracket 2. The movable bracket 2 is also arranged in a hollow rectangular frame shape. Multiple winding posts 22 are arranged on the movable bracket 2, and four sets of coils 221 are wound on the winding posts 22. The four sets of magnets 111 and the four sets of coils 221 correspond one-to-one. The movable bracket 2 is provided with a driving circuit and a driving chip electrically connected to the coils 221. Several electronic components are arranged on the inner plate 31, and the electronic components are electrically connected to the driving circuit.

[0019] like Figures 2-4 As shown, protrusions 21 are fixed at each of the four corners of the movable bracket 2 near the outer frame 11. Three of the protrusions 21 have mounting grooves 211. Sliding grooves 113 are formed at the three corners of the outer frame 11 near the movable bracket 2, corresponding to the mounting grooves 211. Both the mounting grooves 211 and the sliding grooves 113 are circular and have the same diameter. Three balls 2111 are embedded in each mounting groove 211, each ball 2111 having the same diameter. The balls 2111 are also embedded in the sliding grooves 113 and roll. The sum of the depths of the mounting grooves 211 and the sliding grooves 113 is less than the sum of their depths. The diameter of the ball bearing 2111 is twice the diameter of the mounting groove 211 and the sliding groove 113. This ensures that the three balls 2111 in the mounting groove 211 are tangent to each other and the groove walls are tangent to each other. Four magnetic iron pieces 23 are fixedly installed on the side of the movable bracket 2 away from the outer frame 11. The four magnetic iron pieces 23 correspond one-to-one with the four magnets 111. The bottom of the sliding groove and the sliding groove 113 are provided with hard pads. The hard pads are made of ceramic or metal, which are not easy to generate debris, thus preventing debris from entering the lens 13 or adhering to the image sensor 311 and affecting the image quality.

[0020] The specific implementation process is as follows: After the coil 221 is energized, the magnitude and direction of the current in the coil 221 cause the coil 221 to generate a magnetic force, which drives the coil 221 to move relative to the magnet 111 group. The coil 221 drives the moving bracket 2 and the sensor to move. When performing image stabilization, the image sensor 311 is moved in the opposite direction of the shaking to compensate for the shaking, thereby achieving the ideal image stabilization compensation effect.

[0021] The above are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A camera module image stabilization mechanism, characterized in that: The device includes a housing mounted on the main body. The housing includes a base connected to the main body and an outer frame connected to the base. A movable bracket and an image sensor are disposed inside the housing between the base and the outer frame. The movable bracket is linked with the image sensor. The side of the movable bracket facing the outer frame has several protrusions, with no fewer than three protrusions. At least three protrusions have mounting grooves, and each mounting groove has a ball embedded in it. The three mounting grooves are distributed at three points on the plane of the movable bracket, and the ball in the three mounting grooves forms a support plane. Several magnets are provided on the side of the outer frame close to the movable support, and several magnetic iron plates corresponding to the magnets are provided on the side of the movable support away from the outer frame. The movable support is in contact with the outer frame by ball bearings under the action of the magnetic iron plates and magnets. Several sets of coils are wound on the movable bracket. The coils are located on the side of the movable bracket near the outer frame and correspond to the magnet. The movable bracket is driven to move horizontally inside the housing by changing the direction of the coil current.

2. The camera module image stabilization mechanism according to claim 1, characterized in that: The outer frame has sliding grooves corresponding to the balls, which are used for the balls to be embedded and roll.

3. The camera module image stabilization mechanism according to claim 2, characterized in that: The sum of the depth of the sliding groove and the depth of the mounting groove is less than the diameter of the ball.

4. The camera module image stabilization mechanism according to claim 3, characterized in that: The number of balls in the mounting groove is set to three. Both the sliding groove and the mounting groove are circular, and the diameter of both the sliding groove and the mounting groove is twice the diameter of the balls.

5. The camera module image stabilization mechanism according to claim 1, characterized in that: The external frame is equipped with a mount for mounting lenses, which can be detachably connected to the external frame via the mount.

6. The camera module image stabilization mechanism according to claim 1, characterized in that: The base is equipped with a flexible circuit board, and the movable bracket is elastically connected to the base through the flexible circuit board. The movable bracket is a hollow rectangle, and the image sensor is mounted on the flexible circuit board.

7. The camera module image stabilization mechanism according to claim 6, characterized in that: The flexible circuit board includes an inner board and an outer board. The outer board is also hollow and rectangular. The inner board is located at the center of the outer board. A cantilever connects the outer board and the inner board. The outer board is fixedly connected to the base, and the inner board is connected to the movable bracket. The image sensor is mounted on the inner board.

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