Prism driving mechanism, camera module and electronic equipment

Abstract

The utility model relates to a prism driving mechanism, camera module and electronic equipment, comprising a base, the base is connected with an outer nodding movable frame through two first rotating structures distributed on a first shaft, the outer nodding movable frame rotates around the first shaft under the driving of a first driving assembly, and the first rotating structure is connected with the outer nodding movable frame through a second rotating structure distributed on the second shaft. An inner head shaking carrier used for bearing a prism is connected into the outer head shaking frame through a second rotating structure, the inner head shaking carrier is driven by a second driving assembly to rotate around a third shaft perpendicular to the first shaft, and the first shaft and the third shaft are perpendicular to a second shaft parallel to the incident optical axis of the prism at the same time. The method has the advantages that the nodding moving frames are distributed on the outer side and the shaking heads are distributed on the inner side by optimizing the layout of the moving frames for nodding and shaking, the problem of shaking crosstalk can be effectively solved, and the advantages of better arm of force and moment of force are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electronic equipment camera, especially relate to a prism drive mechanism, camera module and electronic equipment. BACKGROUND

[0002] Mobile phone photography optical image stabilization is a kind of action stabilization platform technology, aims at reducing the influence caused by mobile phone camera shaking and vibration and other factors on image stability.In the process of mobile phone shooting, due to the hand tremor, object movement and other factors when shooting, often lead to picture blur, distortion and other problems, at this time camera optical image stabilization technology can play an important role.

[0003] In the existing periscopic camera module, it is often realized by driving prism to rotate around two perpendicular axes, but there are still some problems in the existing structure, the existing technology usually adopts the way of outer pan and inner tilt to realize anti-shake, and the pan frame is arranged on the outer side in the scheme, which has a larger crosstalk problem. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above problem, provide a prism drive mechanism, camera module and electronic equipment that can solve the above technical problem.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] Prism drive mechanism, including base, the base is connected with the outer tilt movable frame through two distribution first rotation structure in the first axis, the outer tilt movable frame rotates around the first axis under the drive of the first drive assembly, the inner pan carrier for bearing prism is connected in the outer tilt movable frame through the second rotation structure, the inner pan carrier rotates around the third axis perpendicular to the first axis under the drive of the second drive assembly, the first axis and the third axis are perpendicular to and parallel to the second axis of the incident light axis of prism.

[0007] Further, one of the first rotation structure includes mutually tangent groove and arc curved surface, any one of the groove and the arc curved surface is arranged on the outer tilt movable frame, and the remaining one is arranged on the base.

[0008] Further, the arc curved surface is at least a part of a spherical surface.

[0009] Further, the arc top plane and the groove bottom form the gap.

[0010] Further, a convex with the arc-shaped surface is arranged on the base, and the convex has two opposite parallel side flanks in the axial direction of the first shaft, the base has an inner wall and an outer wall, one of the side flanks is flush with the inner wall, and the other side flank is flush with the outer wall.

[0011] Further, one of the first rotating structures is a spherical first rotating structure.

[0012] Further, the prism driving mechanism further comprises a magnetic attraction assembly for keeping the first rotating structure in a rotating state, at least a part of the magnetic attraction assembly is fixed to the base, and the rest of the magnetic attraction assembly is fixed to the outer nodding moving frame.

[0013] Further, the first driving assembly and the second driving assembly are both electromagnetic driving assemblies, at least a part of the first driving assembly is arranged on the base, and the rest of the first driving assembly is arranged on the outer nodding moving frame; at least a part of the second driving assembly is arranged on the base, and the rest of the second driving assembly is arranged on the inner shaking carrier.

[0014] As an application scheme, the application further provides a camera module, which comprises the prism driving mechanism.

[0015] As an application scheme, the application further provides an electronic device, which comprises the camera module.

[0016] Compared with the prior art, the prism driving mechanism has the advantages that the nodding moving frame is distributed on the outer side, the shaking is distributed on the inner side, the shaking crosstalk problem is effectively solved, and the force arm and torque advantages are better. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the prism driving mechanism main body structure assembly of the utility model;

[0018] Figure 2 It is a prism driving mechanism hidden flexible circuit board main body structure assembly drawing of the utility model;

[0019] Figure 3 It is Figure 2 It is a B area main part detail enlarged view of the utility model;

[0020] Figure 4 It is a prism driving mechanism main body structure assembly plan view of the utility model;

[0021] Figure 5 It is Figure 4 It is an A-A cross section detail view of the utility model;

[0022] Figure 6 Assemble the exploded view A of the prism driving mechanism main body structure of the utility model;

[0023] Figure 7 Assemble the exploded view B of the prism driving mechanism main body structure of the utility model;

[0024] Figure 8 Assemble the exploded view C of the prism driving mechanism main body structure of the utility model;

[0025] Figure 9 Assemble the exploded view D of the prism driving mechanism main body structure of the utility model;

[0026] Figure 10 It is the example schematic view of electronic equipment in example four.

[0027] In the figure, base 1, protrusion 10, side wing facade 100, first rotation structure 2, groove 20, arc curved surface 21, arc top plane 210, first part 22, second part 23, outer nodding movable frame 3, first drive assembly 4, first drive coil 40, first drive magnet 41, second rotation structure 5, rotation fixed point 50, movable contact point 51, inner nodding carrier 6, second drive assembly 7, second drive coil 70, second drive magnet 71, magnetic attraction assembly 8, first axis X, second axis Z, third axis Y, plane xY, gap S, flexible circuit board F. DETAILED DESCRIPTION

[0028] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0029] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include first and second features direct contact, also can include first and second features is not direct contact but is through their between another feature contact. Moreover, first feature is in second feature "on", "above" and "upper surface" include first feature is in second feature directly above and oblique above, or only indicate first feature horizontal height is higher than second feature. First feature is in second feature "under", "below" and "under" include first feature is in second feature directly below and oblique below, or only indicate first feature horizontal height is less than second feature.

[0031] In the description of the present embodiment, the terms "upper", "lower", "right", "left" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0032] Embodiment one

[0033] The prism driving mechanism comprises a base 1, the base 1 is connected with an outer head moving frame 3 through two first rotating structures 2 distributed on a first axis X, the outer head moving frame 3 rotates around the first axis X under the drive of a first driving assembly 4, an inner head carrier 6 for bearing a prism is connected in the outer head moving frame 3 through a second rotating structure 5, the inner head carrier 6 rotates around a third axis Y perpendicular to the first axis X under the drive of a second driving assembly 7, and the first axis X and the third axis Y are perpendicular to a second axis Z parallel to the incident light axis of the prism.

[0034] As Figures 6-7As shown, one of the first rotating structures 2 comprises a groove 20 and an arc-shaped curved surface 21 which are tangent to each other, and any one of the groove 20 and the arc-shaped curved surface 21 is arranged on the outer nodding moving frame 3, and the other one is arranged on the base 1, the groove 20 can be a V-shaped groove, and the arc-shaped curved surface 21 can be at least a part of a spherical surface, the groove 20 can naturally guide the outer nodding moving frame 3 to move along a predetermined track, and the arc-shaped curved surface 21 provides a more smooth contact surface through its streamlined design. When the two interact with each other, the groove 20 can accurately position the hinge point, ensure that good centering effect is always maintained during movement, thereby reducing wear and tear and improving service life. Under the cooperation of the groove 20 and the arc-shaped curved surface 21, the first rotating structure 2 can still stably operate under dynamic load conditions, the groove 20 and the arc-shaped curved surface 21 have two points tangent to each other, so that higher contact efficiency is achieved, and theoretically the friction on the contact surface is smaller, and the driving force required during movement is reduced, so that a smaller power driving system can be used under the same conditions, thereby improving the energy efficiency of the overall system.

[0035] In particular, as Figures 2-3 As shown, a gap S is reserved between the groove bottom of the groove 20 and the arc top of the arc-shaped curved surface 21; in actual operation, the reserved gap S makes the installation of the assembly more convenient, and can effectively avoid installation difficulties caused by insufficient precision, and the gap S is formed by the arc top plane 210 provided on the arc top of the arc-shaped curved surface 21 and the groove bottom of the groove 20, wherein the arc top plane 210 plays a certain role in avoiding the groove bottom of the groove 20, so that different specifications of the arc-shaped curved surface 21 will not always contact the groove bottom of the groove 20 in the groove 20.

[0036] The base 1 is provided with a protrusion 10, and the arc-shaped curved surface 21 is arranged on the protrusion 10, as shown in the figure, and the protrusion 10 is axially provided with two parallel side wing vertical surfaces 100 about the first axis X, and the two side wing vertical surfaces 100 are flush with the inner wall and the outer wall of the base 1 respectively, and the design that the side wing vertical surfaces 100 are flush with the inner wall and the outer wall of the base 1 can effectively utilize space, and ensures that the protrusion 10 does not occupy too much additional space during installation or configuration, so as to improve the compactness of the overall design.

[0037] As Figure 1As shown, a flexible circuit board F electrically connected to the first driving component 4 is provided on the outer wall of the base 1. The first driving component 4 is an electromagnetic driving component. The flexible circuit board F provides current support to the first driving component 4, enabling the first driving component 4 to generate electromagnetic force to drive the outer nodding frame 3 to rotate around the first axis X. At least a portion of the first driving component 4 is provided on the base 1, and the remaining portion of the first driving component 4 is provided on the outer nodding frame 3. In this embodiment, the first driving component 4 includes a first driving coil 40 provided on the base 1 and a first driving magnet 41 provided on the outer nodding frame 3. The first driving coil 40 and the first driving magnet 41 are spaced apart, and the first driving coil 40 is connected to the flexible circuit board F.

[0038] like Figures 8-9 As shown, in addition to the aforementioned first rotating structure 2, the remaining first rotating structure 2 is a spherical first rotating structure. This spherical first rotating structure includes a first portion 22 that is at least partially convex and a second portion 23 that is at least partially concave. The first portion 22 and the second portion 23 are matched with each other. Either the first portion 22 or the second portion 23 is located on the base 1, and the other is located on the outer nodding frame 3. In this embodiment, the first portion 22 that is partially convex is composed of a metal sphere embedded in the outer nodding frame 3 or the base 1, and the second portion 23 is seamlessly fitted with the first portion 22. The design of the spherical first rotating structure restricts the movement of the outer nodding frame 3 in all directions within the plane xY. In other embodiments, the spherical first rotating structure is a ball bearing, which is relatively movable relative to both the outer nodding frame 3 and the base 1.

[0039] In this embodiment, to ensure that the outer nodding frame 3 does not move upward relative to the base 1 along the second axis Z and to ensure that the first rotating structure 2 always remains in a hinged state, the prism driving mechanism further includes a magnetic suction component 8. At least a portion of the magnetic suction component 8 is fixed to the base 1, and the remaining portion of the magnetic suction component 8 is fixed to the outer nodding frame 3. The magnetic suction component 8 always attracts the outer nodding frame 3 to the base 1, preventing the prism driving mechanism from falling off in different posture positions.

[0040] Example 2

[0041] 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 mechanism of Embodiment 1, this embodiment describes other main components of the prism driving mechanism.

[0042] As shown in the figure, the prism driving mechanism also includes an inner oscillating carrier 6 connected within the outer nodding frame 3 via a second rotating structure 5. This inner oscillating carrier 6 carries the prism used for refracting light. The second rotating structure 5 causes the inner oscillating carrier 6 to rotate upwards relative to the outer nodding frame 3 around the third axis Y. Specifically, the second rotating structure 5 has at least two connection points, with at least one connection point serving as a fixed point for rotation. In this embodiment, the second rotating structure 5 includes a fixed rotation point 50 and two movable contacts 51, arranged in an isosceles triangle. The fixed rotation point 50 is located at the apex of the isosceles triangle. When the inner oscillating carrier 6 rotates, the fixed rotation point 50 serves as a fixed rotation center, and the two movable contacts 51 move around the fixed rotation point 50.

[0043] like Figures 4-5 As shown, the inner oscillating carrier 6 rotates around the connection point, which serves as a fixed point, under the drive of the second driving component 7. The second driving component 7 and the first driving component 4 in Embodiment 1 are both electromagnetic driving components. The flexible circuit board F provides current support for the second driving component 7. At least a portion of the second driving component 7 is located on the base 1, and the remaining portion is located on the inner oscillating carrier 6. In this embodiment, the second driving component 7 includes a second driving coil 70 disposed on the base 1 and a second driving magnet 71 disposed on the inner oscillating carrier 6. The second driving coil 70 is connected to the flexible circuit board F. Specifically, as shown in the figure, the first driving coil 40 in Embodiment 1 is located on the side wall of the base 1, while the second driving coil 70 is located at the bottom of the base 1. A clearance portion is provided at the bottom of the outer oscillating frame 3 to avoid the second driving magnet 71, ensuring stable cooperation between the second driving coil 70 and the second driving magnet 71.

[0044] Example 3

[0045] 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 mechanism of Embodiment 1 and Embodiment 2, the camera module of this embodiment includes a prism driving mechanism and a lens driving mechanism.

[0046] A lens drive mechanism is a device used to adjust the position or focal length of a lens, while a prism drive mechanism is used to drive the prism to rotate for image stabilization. The main function of the camera module is to adjust the position of the lens to control the focal length, focusing, or convergence of the optical system.

[0047] Example 4

[0048] 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.

[0049] like Figure 10As shown, the electronic device includes a camera module, which refers to a modular assembly that integrates a camera, lens, sensor, and other related elements together. The camera module typically includes image sensors, image processors, lenses, optical filters, focal length adjusters, autofocus modules, and other elements that can be directly used in various devices and applications, such as smartphones, tablets, surveillance cameras, vehicle-mounted cameras, and the like.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. Prism drive mechanism comprising a base (1), characterized in that, The base (1) is connected with an outer nodding moving frame (3) through two first rotating structures (2) distributed on a first axis (X), the outer nodding moving frame (3) rotates around the first axis (X) under the driving of a first driving assembly (4), an inner panning carrier (6) for carrying a prism is connected in the outer nodding moving frame (3) through a second rotating structure (5), the inner panning carrier (6) rotates around a third axis (Y) perpendicular to the first axis (X) under the driving of a second driving assembly (7), the first axis (X) and the third axis (Y) are both perpendicular to a second axis (Z) parallel to an incident optical axis of the prism.

2. The prism driving mechanism according to claim 1, characterized by One of the first rotating structures (2) comprises a groove (20) and an arc-shaped curved surface (21) which are tangent to each other, either one of the groove (20) and the arc-shaped curved surface (21) is arranged on the outer nodding moving frame (3), and the other one is arranged on the base (1).

3. The prism driving mechanism according to claim 2, characterized by The arc-shaped curved surface (21) is at least a part of a spherical surface.

4. The prism driving mechanism according to claim 3, characterized by An arc top plane (210) is arranged at the arc top of the arc-shaped curved surface (21), the arc top plane (210) and the groove bottom of the groove (20) form a gap (S).

5. The prism driving mechanism according to claim 2 or 3 or 4, characterized by, A protrusion (10) with the arc-shaped curved surface (21) is arranged on the base (1), in the axial direction of the first axis (X), the flanks of the protrusion (10) have two opposite parallel flank vertical surfaces (100), the base (1) has an inner wall and an outer wall, one of the flank vertical surfaces (100) is flush with the inner wall, and the other flank vertical surface (100) is flush with the outer wall.

6. The prism driving mechanism according to claim 2 or 3 or 4, characterized by, The other one of the first rotating structures (2) is a spherical first rotating structure.

7. The prism driving mechanism according to claim 1 or 2, characterized by The prism driving mechanism further comprises a magnetic attraction assembly (8) for keeping the first rotating structure (2) in a rotating state, at least a part of the magnetic attraction assembly (8) is fixed on the base (1), and the remaining part of the magnetic attraction assembly (8) is fixed on the outer nodding moving frame (3).

8. The prism driving mechanism according to claim 1, characterized by The first driving assembly (4) and the second driving assembly (7) are both electromagnetic driving assemblies, at least a part of the first driving assembly (4) is arranged on the base (1), and the remaining part of the first driving assembly (4) is arranged on the outer nodding moving frame (3); at least a part of the second driving assembly (7) is arranged on the base (1), and the remaining part of the second driving assembly (7) is arranged on the inner panning carrier (6).

9. A camera module characterized by, The camera module comprises the prism driving mechanism according to any one of claims 1-8.

10. An electronic device, characterized by The electronic device comprises the camera module according to claim 9.

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