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 base, and the dynamic frame of being driven relative base around the first axis rotation by first drive component, movement retaining component is further provided between base and dynamic frame in the plane perpendicular to first axis, prism driving device further includes movement retaining magnetic attraction component, movement retaining magnetic attraction component is at least partially provided in base, and the remaining part of movement retaining magnetic attraction component is provided in dynamic frame, movement retaining magnetic attraction component has two groups and is distributed in the two sides of first axis.Advantages are that: two groups of movement retaining magnetic attraction component are used, and are distributed in the two sides of first axis, can provide stronger adsorption force, while improve the stability control of magnetic attraction component to ball rotation connection point, further improve optical anti-shake performance.

Description

Technical Field

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

[0002] Optical image stabilization (OIS) in mobile photography is a motion stabilization platform technology designed to reduce the impact of camera shake and vibration on image stability. During mobile phone photography, factors such as hand tremors and object movement often lead to blurry or distorted images; in these situations, OIS technology plays a crucial role.

[0003] In existing technologies, the ball bearing rotation connection point in a prism drive device is often equipped with a magnetic chuck assembly to ensure stable rotation. This magnetic chuck assembly consists of two mutually magnetically attracted components. However, when the optical components undergo image stabilization movements, the stability control of the ball bearing rotation connection point using existing magnetic chuck assemblies needs further improvement to enhance optical image stabilization performance. 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:

[0006] A prism driving device includes a base and a moving frame that is driven to rotate relative to the base about a first axis by a first driving component. A motion holding component is also provided between the base and the moving frame. The prism driving device further includes a motion holding magnetic component. The motion holding magnetic component is at least partially disposed on the base and the remaining part of the motion holding magnetic component is disposed on the moving frame. At least two sets of the motion holding magnetic component are provided, and two sets are distributed on both sides of the first axis.

[0007] Furthermore, the two sets of motion-holding magnetic assemblies are symmetrically distributed about the first axis; the first drive assembly and the motion-holding magnetic assemblies are located in different planes.

[0008] Furthermore, the motion-holding magnetic attraction assembly includes a first magnetic attraction element and a second magnetic attraction element that are magnetically attracted to each other. Both the first magnetic attraction element and the second magnetic attraction element are magnets, or one of them is a magnet and the other is a magnetic element that can attract a magnet. Either the first magnetic attraction element or the second magnetic attraction element is disposed on the base, and the remaining one is disposed on the moving frame.

[0009] Furthermore, the motion-holding assembly includes at least two sets of ball bearings.

[0010] Furthermore, the ball bearing assembly consists of three sets arranged in a triangular pattern. One set of the ball bearing assembly is a fixed-point motion ball bearing assembly, and the remaining ball bearing assemblies move relative to the fixed-point motion ball bearing assembly with the fixed-point motion ball bearing assembly as the center.

[0011] Furthermore, the fixed-point moving ball assembly includes an insert that is embedded in the base and the moving frame respectively and has a ball receiving groove, the two ball receiving grooves forming a receiving space for receiving the fixed-point ball; at least one of the inserts is provided with a third magnetic attractor that attracts the other insert.

[0012] Furthermore, the ball receiving groove has a groove wall tangent to the fixed ball.

[0013] Furthermore, the three sets of ball bearings enclose a triangular region, and the two sets of motion-holding magnetic assemblies are located within the triangular region.

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

[0015] As an application solution, this application also provides an electronic device, which includes the aforementioned camera module.

[0016] Compared with existing technologies, the advantages of this application are: it adopts two sets of motion-holding magnetic components, which are distributed on both sides of the first axis, to provide stronger adsorption force, while improving the stability control of the magnetic components for the ball rotation connection point, and further improving the optical image stabilization performance. Attached Figure Description

[0017] Figure 1 This is a finished assembly drawing of the prism driving device of this utility model.

[0018] Figure 2 Exploded view 1 shows the main components of the prism driving device of this utility model;

[0019] Figure 3 Exploded view 2 shows the main components of the prism driving device of this utility model;

[0020] Figure 4 Exploded view 3 shows the main components of the prism driving device of this utility model;

[0021] Figure 5 Exploded view 4 shows the main components of the prism driving device of this utility model;

[0022] Figure 6 Detailed assembly diagram of the moving frame and other main components of this utility model;

[0023] Figure 7Exploded view 5 shows the main components of the prism driving device of this utility model;

[0024] Figure 8 This is a schematic diagram illustrating an example of an electronic device in Embodiment 5.

[0025] In the figure, the components are: base 1, moving frame 2, receiving groove 20, embedded reinforcing member 21, first driving assembly 3, first driving coil 30, first driving magnet 31, motion holding assembly 4, ball group 40, movable ball 401, fixed ball 41, motion holding magnetic suction assembly 5, first magnetic suction member 51, second magnetic suction member 52, insert 6, ball receiving groove 61, second driving assembly 7, second driving coil 70, second driving magnet 71, carrier 8, fixed magnet 80, motion hinge 9, first axis X, second axis Y, and plane yZ. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example 1

[0031] like Figure 1 As shown, the prism driving device includes a base 1 for accommodating components and a movable frame 2 disposed within the base 1. The movable frame 2 can rotate relative to the base 1 around a first axis X under the drive of a first driving component 3 to achieve partial anti-shake effect. A motion holding component 4 for achieving a movable connection is also provided between the movable frame 2 and the base 1. In this embodiment, the motion holding component 4 is located in a plane yZ perpendicular to the first axis X. The prism driving device also includes a motion holding magnetic attraction component 5 for attracting the movable frame 2 and the base 1 along the first axis X. In other embodiments, the motion holding component 4 may be located in the XY plane.

[0032] Regarding the aforementioned motion-holding magnetic component 5, such as Figure 7 As shown, the motion holding magnetic assemblies 5 are at least partially disposed on the base 1, and the remaining part of the motion holding magnetic assemblies 5 is disposed on the moving frame 2. In this embodiment, the motion holding magnetic assemblies 5 have at least two sets, wherein the two sets of motion holding magnetic assemblies 5 are axially symmetrical about the first axis X and distributed on both sides, which have the effect of maintaining the stability of the moving frame 2 and resetting the moving frame 2.

[0033] Each set of motion-holding magnetic assemblies 5 consists of two parts, respectively disposed within the base 1 and the moving frame 2. Specifically, the motion-holding magnetic assemblies 5 include a first magnetic accommodating element 51 and a second magnetic accommodating element 52 that are magnetically attracted to each other. Either the first magnetic accommodating element 51 or the second magnetic accommodating element 52 is disposed in the base 1, and the remaining one is disposed in the moving frame 2. At least one of the first magnetic accommodating element 51 and the second magnetic accommodating element 52 is magnetic. In this embodiment, both the first magnetic accommodating element 51 and the second magnetic accommodating element 52 are magnetic, and the parts of the two that are close to each other are magnetically attracted, thereby achieving a stable connection between the moving frame 2 and the base 1 along the first axis X. Specifically, when the moving frame 2 rotates around the first axis X, the mutual attraction between the first magnetic accommodating element 51 and the second magnetic accommodating element 52 will adjust with the change in the position of the moving frame 2, thereby maintaining a certain stable attraction during the rotation of the moving frame 2 and forming magnetic attraction on both sides of the first axis X, which can achieve a better repositioning effect for the moving frame 2. Furthermore, the advantage of having both magnetic components compared to having only one magnetic component is that after the device completes its operation, the two magnetic components will attract each other to the point of maximum magnetic attraction, achieving the repositioning effect of the moving frame 2. A single magnetic component does not have this effect. Both the first magnetic component 51 and the second magnetic component 52 are magnets, or one is a magnet and the other is a magnetic component that can attract a magnet.

[0034] Meanwhile, regarding the aforementioned motion holding component 4, the motion holding component 4 includes at least two sets of ball bearings 40. In this embodiment, the ball bearings 40 are set to three sets, and the three sets of ball bearings 40 are distributed in an isosceles triangle. Specifically, among the three sets of ball bearings 40, one set of ball bearings 40 is a fixed-point motion ball bearing set, and the remaining two sets of ball bearings 40 move relative to the fixed-point motion ball bearing set as the center. Specifically, the fixed-point motion ball bearing set is placed at the apex of the isosceles triangle, and the remaining ball bearings 40 include movable balls 401, and a receiving groove 20 is provided on the base 1 and / or the moving frame 2 for accommodating at least part of the movable balls 401. The two movable balls 401 are placed at the edges of the isosceles triangle. When performing anti-shake operation, the fixed-point motion ball bearing set serves as the rotation point, and the two movable balls 401 move in an arc around the fixed-point motion ball bearing set to realize the shaking motion of the moving frame 2.

[0035] Furthermore, the three sets of ball bearings 40 form a triangular region, and the two sets of motion-holding magnetic components 5 are located within the triangular region, with their magnetic attraction direction matching the movement direction of the ball bearings 40. Thus, when the stationary ball bearings 40 remain stationary, the remaining two sets of ball bearings 40 move relative to it, thereby achieving stable adsorption or support for the moving frame 2.

[0036] In other embodiments, when the motion retaining assembly 4 is located in the XY plane, the ball assembly 40 has two sets, each including one ball, with the two balls arranged along the first axis X.

[0037] like Figures 2-5 As shown, the aforementioned fixed-point motion ball assembly includes inserts 6 that are respectively embedded in the base 1 and the moving frame 2 and have ball receiving grooves 61. The two ball receiving grooves 61 form a receiving space for accommodating the fixed-point ball 41. The fixed-point ball matches the ball receiving groove 61 to ensure that it maintains a stable position in the working state. The ball receiving groove 61 has multiple groove walls tangential to the fixed-point ball 41. These groove walls contact the outer circle of the fixed-point ball 41 to form a multi-point support positioning structure, which can effectively limit the movement trajectory of the fixed-point ball 41 and provide a stable contact surface, ensuring the high precision and stability of the fixed-point motion ball assembly 40 during operation. At least one of the inserts 6 is provided with a third magnetic attractor that attracts the other insert 6, which can improve the stability of the moving frame 2 on the base 1.

[0038] Example 2

[0039] 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.

[0040] In this embodiment, the prism driving device further includes a carrier 8 that is driven by the second driving component 7 to rotate relative to the moving frame 2 around the second axis Y. A plurality of moving hinges 9 located on the second axis Y are also provided between the moving frame 2 and the carrier 8. The prism driving device also includes a fixed magnet 80 provided on the carrier 8. Furthermore, the moving frame 2 is also provided with an embedded reinforcing member 21 that is attracted by the fixed magnet 80. The fixed magnet 80 drives the relative movement between the moving frame 2 and the carrier 8 through magnetic attraction, ensuring that the moving frame 2 can rotate smoothly around the second axis Y.

[0041] The motion hinge 9 provides a flexible connection between the moving frame 2 and the carrier 8, while ensuring the stability of the rotational motion. In this embodiment, there are two sets of motion hinges 9, and the two sets of motion hinges 9 are symmetrically distributed about the first axis X.

[0042] Example 3

[0043] The structure and principle of this embodiment are basically the same as those of Embodiment 1 and Embodiment 2. The difference lies in that, for the prism driving device of Embodiment 1 and Embodiment 2, this embodiment describes the driving components of the prism driving device.

[0044] like Figures 2-4As shown, in this embodiment, the first driving component 3 is used to drive the moving frame 2 to rotate relative to the base 1 around the first axis X. The first driving component 3 includes a first driving coil 30 and a first driving magnet 31 that are spaced apart from each other. Either the first driving coil 30 or the first driving magnet 31 is disposed on the base 1, and the other is disposed on the moving frame 2. The first driving component 3 and the motion-holding magnetic attraction component 5 are located in different planes. In this embodiment, the first driving coil 30 and the first driving magnet 31 are arranged opposite each other in the second axis Y direction, and the first magnetic attraction component 51 and the second magnetic attraction component 52 are arranged opposite each other in the first axis X direction.

[0045] like Figures 2-4 As shown, in this embodiment, the second driving component 7 is used to drive the carrier 8 to rotate relative to the moving frame 2 around the second axis Y. The second driving component 7 includes a second driving coil 70 and a second driving magnet 71 that are spaced apart from each other. Either the second driving coil 70 or the second driving magnet 71 is disposed on the base 1, and the other is disposed on the carrier 8.

[0046] Example 4

[0047] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that, for the prism driving device of Embodiment 1, the camera module of this embodiment includes a prism driving device.

[0048] 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.

[0049] Example 5

[0050] 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.

[0051] like Figure 8 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.

[0052] 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 movable frame (2) driven by a first driving component (3) to rotate relative to the base (1) about a first axis (X), wherein a motion holding component (4) is further provided between the base (1) and the movable frame (2), the prism driving device further comprising a motion holding magnetic component (5), wherein at least a portion of the motion holding magnetic component (5) is disposed on the base (1), and the remaining portion of the motion holding magnetic component (5) is disposed on the movable frame (2), characterized in that, The motion-holding magnetic assemblies (5) are provided in at least two sets, with two sets distributed on both sides of the first axis (X).

2. The prism driving device according to claim 1, characterized in that, The two sets of motion-holding magnetic assemblies (5) are symmetrically distributed about the first axis (X); the first drive assembly (3) and the motion-holding magnetic assemblies (5) are located in different planes.

3. The prism driving device according to claim 1 or 2, characterized in that, The motion-holding magnetic suction assembly (5) includes a first magnetic suction element (51) and a second magnetic suction element (52) that are magnetically attracted to each other. Both the first magnetic suction element (51) and the second magnetic suction element (52) are magnets, or one of them is a magnet and the other is a magnetic element that can attract a magnet. Either the first magnetic suction element (51) or the second magnetic suction element (52) is located on the base (1), and the other is located on the moving frame (2).

4. The prism driving device according to claim 1, characterized in that, The motion holding assembly (4) includes at least two sets of ball bearings (40).

5. The prism driving device according to claim 4, characterized in that, The ball sets (40) are in three groups and arranged in a triangular pattern. One group of the ball sets (40) is a fixed-point moving ball set, and the remaining ball sets (40) move relative to the fixed-point moving ball set with the fixed-point moving ball set as the center.

6. The prism driving device according to claim 5, characterized in that, The fixed-point moving ball assembly includes an insert (6) that is embedded in the base (1) and the moving frame (2) respectively and has a ball receiving groove (61). The two ball receiving grooves (61) form a receiving space for receiving a fixed-point ball (41). At least one of the inserts (6) is provided with a third magnetic attractor that attracts the other insert (6).

7. The prism driving device according to claim 6, characterized in that, The ball receiving groove (61) has a groove wall that is tangent to the fixed ball (41).

8. The prism driving device according to claim 5, characterized in that, The three sets of ball bearings (40) enclose a triangular area, and the two sets of motion-holding magnetic assemblies (5) are located within the triangular area.

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.

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