Prism driving device, camera module and electronic equipment

Abstract

The utility model relates to a prism driving device, camera module and electronic equipment, comprising a base and a movable frame which is driven by a first driving assembly to rotate around an incident optical axis relative to the base, the prism driving device also comprises a fixed-point moving part and a plurality of ball groups, each ball group comprises a plurality of balls, the fixed-point moving part and the plurality of ball groups are respectively distributed on a plane vertical to the incident optical axis, the fixed-point moving part is in movable contact with at least any one of the base and the movable frame, and the ball groups are in movable contact with at least any one of the base and the movable frame. The driving device has the advantages that the design of the fixed-point moving part and the multiple ball groups is adopted, the precision and stability of the driving device are remarkably improved through the design of multi-point contact of the ball groups, and vibration and abrasion are reduced. Smooth rotation and high-precision positioning of the prism are ensured, and meanwhile, the modular design of the fixed-point moving part and the ball group facilitates maintenance and replacement.

Description

TECHNICAL FIELD

[0001] The utility model belongs to digital photography parts field especially, it relates to a prism drive device, camera module and electronic equipment. BACKGROUND

[0002] Mobile phone photography optical anti-shake is a kind of action stable 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 when shooting, object movement and other factors, often lead to picture blur, distortion and other problems, then camera optical anti-shake technology can play an important role.

[0003] In prior art, the head moving frame in prism drive device often adopts guide rail plus single ball transmission mode, single ball and guide rail contact only one point, there is limitation in movement process. UTILITY MODEL CONTENT

[0004] The utility model aims at above -mentioned problem, provide can solve above -mentioned technical problem a kind of prism drive device, camera module and electronic equipment.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] Prism drive device, including base, and the dynamic frame of rotating by the first drive component drive relative to the base, the prism drive device further includes fixed point moving part and several groups of ball group, each group of ball group includes several balls respectively, the fixed point moving part and several groups of ball group are distributed in the same plane, the fixed point moving part and at least any one of the base and the dynamic frame are in contact, and the ball group and at least any one of the base and the dynamic frame are in contact.

[0007] Further, the fixed point moving part is in contact with the base and the dynamic frame respectively.

[0008] Further, at least part of the fixed point moving part is fixed to the base, and the remaining part of the fixed point moving part is in contact with the dynamic frame.

[0009] Further, at least part of the fixed point moving part is fixed to the dynamic frame, and the remaining part of the fixed point moving part is in contact with the base.

[0010] Further, the ball group is in contact with the base and the dynamic frame respectively.

[0011] Further, the ball group has two groups, and the ball group and the fixed point moving part are triangularly distributed.

[0012] Further, the fixed-point moving part has an arc convex surface, and the base and / or the movable frame is provided with a groove in active contact with the arc convex surface.

[0013] Further, the fixed-point moving part is any one of a spherical ball, a hemispherical ball and a column with an arc convex surface.

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

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

[0016] Compared with the prior art, the application has the advantages that the defects of the traditional guide rail plus single ball transmission mode are effectively solved through innovative structural optimization. In the design, the fixed-point moving part and the multiple ball groups work cooperatively, the multiple-point contact design of the ball groups significantly improves the precision and stability of the driving device, reduces the vibration and wear problems caused by single-point contact, and ensures the smooth rotation and high-precision positioning of the prism. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a main component assembly finished product schematic view of the prism driving device of the application;

[0018] Figure 2 It is an explosion detail A view of the main components of the prism driving device of the application;

[0019] Figure 3 It is an explosion detail B view of the main components of the prism driving device of the application;

[0020] Figure 4 It is a detail view of the base and the main components fixed on the base of the application;

[0021] Figure 5 It is an example schematic view of the electronic device in example five.

[0022] In the figure, the base 1, the movable frame 2, the implant 20, the lens carrier 3, the first driving assembly 4, the first driving magnet 40, the first driving coil 41, the first containing groove 5, the second driving assembly 6, the fixed-point moving part P1, the ball group P2, the ball P20, the plane xY, the shaft body S, the first direction axis Y, the incident light axis Z. DETAILED DESCRIPTION

[0023] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit 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.

[0024] 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 an 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.

[0025] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] In the description of the embodiment, the terms "up", "down", "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, it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0027] Embodiment one

[0028] As Figures 1-2As shown, the prism driving device comprises a base 1 for bearing device components, and a moving frame 2 arranged in the base 1, the moving frame 2 is driven to rotate relative to the base 1 by a first driving assembly 4, in order to ensure smooth and stable rotation between the moving frame 2 and the base 1, a fixed-point moving part P1 and a plurality of ball groups P2 cooperating with the fixed-point moving part P1 are arranged between the base 1 and the moving frame 2, the plurality of ball groups P2 move along an arc-shaped trajectory, an oblique line or a straight line trajectory in the plane xY with the fixed-point moving part P1 as the center, or directly roll, and the ball groups P2 are in movable contact with at least any one of the base 1 and the moving frame 2, the fixed-point moving part P1 is used to provide a rotation axis for the moving frame 2, and the rotation axis is arranged on the incident light axis Z axis, so that the moving frame 2 has a rotation axis (i.e. the incident light axis Z) when rotating, as an alternative, the fixed-point moving part P1 can provide any one rotation axis for the moving frame 2, and the axis can be adjusted and designed according to the actual use condition, for example, the rotation axis is a first direction axis Y perpendicular to the incident light axis Z or an axis perpendicular to the incident light axis Z and the first direction axis Y, the fixed-point moving part P1 is in movable contact with at least any one of the base 1 and the moving frame 2, and the ball groups P2 play a supporting and guiding role while reducing friction during rotation.

[0029] In the embodiment, the fixed-point moving part P1 is in movable contact with the base 1 and the moving frame 2 respectively. The fixed-point moving part P1 has an arc-shaped convex surface, specifically, the fixed-point moving part P1 is any one of a spherical body, a hemispherical body and a column body with an arc-shaped convex surface, in the embodiment, the fixed-point moving part P1 is designed as a spherical body, and a groove in movable contact with the arc-shaped convex surface is arranged on the base 1 and / or the moving frame 2. The groove is any one of a circular arc groove and a triangular taper groove or a combination of the two. Specifically, a circular arc groove accommodating the fixed-point moving part P1 is arranged on the base 1, the arc-shaped convex surface profile of the fixed-point moving part P1 is in movable contact with the circular arc groove, and a triangular taper groove allowing the fixed-point moving part P1 to partially extend into is arranged on the moving frame 2, and the arc-shaped convex surface of the fixed-point moving part P1 is in movable contact with three sides of the triangular taper groove.

[0030] This design realizes high-precision positioning and stable movement of the fixed-point moving part in different directions by combining the characteristics of the circular arc groove and the triangular taper groove. The circular arc groove provides a fixed point for the fixed-point moving part, and the triangular taper groove enhances the positioning rigidity of the fixed-point moving part through three-sided contact, effectively avoiding deviation or vibration during movement.

[0031] In the embodiment, as shown in Figure 4Each ball group P2 includes several balls P20. The ball group P2 is designed as two groups, and the two groups of ball groups P2 and the fixed-point moving part P1 are distributed in an isosceles triangle. The three groups are distributed at the corners, and the fixed-point moving part P1 is located at the apex. At the same time, the two groups of ball groups P2 and the fixed-point moving part P1 are all placed in a plane xY perpendicular to the incident optical axis Z to ensure the rotational stability between the moving frame 2 and the base 1. Alternatively, the two groups of ball groups P2 and the fixed-point moving part P1 may not be in the same plane xY. As long as the rotation path of the moving frame 2 part in contact with the part is always perpendicular to the incident optical axis Z when it rotates.

[0032] In addition, the moving frame 2 is provided with an implant 20 having at least a portion extending into a groove, and the groove is provided on the implant 20.

[0033] The implant 20 is a plate with an angled shape. At least a portion of the implant 20 extends to the bottom surface of the moving frame 2, which is parallel to the plane xY, and the remaining portion of the implant 20 extends to the side surface of the moving frame 2, which is perpendicular to the plane xY.

[0034] The design structure of the implant 20 can provide strength, with one part extending parallel to the bottom surface to improve horizontal support strength, and another part extending perpendicular to the side surface to provide vertical support strength.

[0035] like Figure 3 As shown, the implant 20 is made of metal or magnetic material. The first drive assembly 4 includes at least one set of first drive magnets 40 fixed to the bottom surface of the moving frame 2, and a first drive coil 41 fixed to the base 1 and spaced apart from the first drive magnets 40. At least a portion of the first drive magnets 40 is in contact with the implant 20.

[0036] By making the implant 20 into a metallic or magnetic material, it can interact with magnetic fields better and can concentrate or transmit magnetic fields more effectively.

[0037] Furthermore, the aforementioned ball bearing group P2 is in movable contact with the base 1 and the moving frame 2, and the base 1 and / or the moving frame 2 are provided with a plurality of first receiving grooves 5 for accommodating the ball bearing group P2. One ball bearing group P2 is placed in one first receiving groove 5, and a plurality of balls in the ball bearing group P2 can roll freely in the first receiving groove 5, and each ball must at least partially abut against the base 1 and / or the moving frame 2. In this embodiment, as shown in the figure, the first receiving groove 5 is provided on the base 1, which makes the installation process more convenient and faster.

[0038] Example 2

[0039] The structure and principle of this embodiment are basically the same as those of Embodiment One, and the difference lies in that, for the fixed-point moving part in Embodiment One, this embodiment describes a new connection mode and interaction relationship of the fixed-point moving part.

[0040] In this embodiment, the fixed-point moving part P1 is designed as a semispherical body or an arc convex cylinder, at least part of the fixed-point moving part P1 is fixed to any one of the base 1 or the movable frame 2, and the remaining part of the fixed-point moving part P1 is in movable contact with the remaining one of the base 1 or the movable frame 2.

[0041] The fixed-point moving part P1 can be integrally formed with the base 1 or the movable frame 2 by injection molding, which can provide a larger contact surface, reduce vibration and noise, and ensure the stability and reliability of the system. By using the injection molding technology, the fixed-point moving part P1 is integrally formed with the base 1 or the movable frame 2, which significantly reduces the gap and assembly error in the traditional assembly process, further improving the rigidity and motion accuracy of the overall structure. This design makes the contact between the fixed-point moving part P1 and the base 1 or the movable frame 2 more closely, ensuring the consistency and controllability during the movement.

[0042] Embodiment Three

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

[0044] As shown in the figure, the movable frame 2 is connected with the lens carrier 3 through the shaft body S distributed along the first direction axis Y perpendicular to the incident optical axis Z and / or the ball;

[0045] The first way: one shaft body S and one ball; the structure of the ball can be limited to move in the direction of the shaft, and the structure of the shaft is responsible for rotation, and the larger contact area of the shaft can improve the reliability and reduce the risk of chipping.

[0046] The second way: two coaxial shaft bodies S.

[0047] The movable frame 2 or the lens carrier 3 has a stable part (not shown in the figure) that is magnetically attracted to the shaft body S and / or the ball. The stable part is magnetically attracted to the shaft body S and / or the ball, which can ensure the stability of the movement of the lens carrier 3. The stable part has a profiling surface that is profiled with at least part of the arc convex surface of the shaft body S or the ball, so as to improve the stability of the magnetic attraction.

[0048] Meanwhile, the lens carrier 3 is rotated relative to the base 1 around the first direction axis Y by driving of a second driving assembly 6, the second driving assembly 6 comprising second driving magnets 60 and second driving coils 61 which are correspondingly and spacedly distributed, either one of the second driving magnets 60 and the second driving coils 61 being arranged on the base 1, and the other one being arranged on the lens carrier 3.

[0049] Embodiment Four

[0050] The structure and principle of this embodiment are basically the same as those of Embodiment One and Embodiment Two, and the difference lies in that, for the prism driving device of Embodiment One, the camera module of this embodiment comprises a prism driving mechanism.

[0051] A camera module is a device used to adjust the position or focal length of a lens, usually through mechanical, electrical or other means. The main function of a camera module is to adjust the position of the lens to control the focal length, focus or focus of the optical system. A camera module refers to a modular component that integrates a camera, lens, sensor and other related components. A camera module usually includes image sensors, image processors, lenses, optical filters, focal length adjusters, autofocus modules and other components, which can be directly used in various devices and applications, such as smartphones, tablets, surveillance cameras, vehicle-mounted cameras, etc.

[0052] Embodiment Five

[0053] The structure and principle of this embodiment are basically the same as those of Embodiment Four, and the difference lies in that, for the camera module of Embodiment Four, the electronic device of this embodiment comprises a camera module.

[0054] As shown in Figure 5 , an electronic device comprises a camera module, and an electronic device refers to a device that uses electronic components and circuit technology to achieve specific functions. These devices are widely used in daily life, industrial production, scientific research and other fields. Common electronic devices include computers, smartphones, televisions, cameras, etc. They perform various operations such as information processing, communication, entertainment and home control through the processing and transmission of electronic signals.

[0055] 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 use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A prism driving device comprising a base (1) and a moving frame (2) driven to rotate relative to the base (1) by a first driving assembly (4), characterized in that, The prism driving device further comprises a fixed-point moving part (P1) and a plurality of groups of ball groups (P2), each of the ball groups (P2) comprises a plurality of balls (P20), the fixed-point moving part (P1) and the plurality of groups of ball groups (P2) are distributed on the same plane, the fixed-point moving part (P1) is in movable contact with at least any one of the base (1) and the movable frame (2), and the ball groups (P2) are in movable contact with at least any one of the base (1) and the movable frame (2).

2. The prism driving device according to claim 1, wherein The fixed-point moving part (P1) is in movable contact with the base (1) and the movable frame (2) respectively.

3. The prism driving apparatus according to claim 1, wherein At least part of the fixed-point moving part (P1) is fixed to the base (1), and the remaining part of the fixed-point moving part (P1) is in movable contact with the movable frame (2).

4. The prism driving apparatus according to claim 1, wherein At least part of the fixed-point moving part (P1) is fixed to the movable frame (2), and the remaining part of the fixed-point moving part (P1) is in movable contact with the base (1).

5. The prism driving apparatus according to claim 1, wherein The ball groups (P2) are in movable contact with the base (1) and the movable frame (2) respectively.

6. The prism driving apparatus according to claim 1, wherein The ball groups (P2) are two groups, and the ball groups (P2) and the fixed-point moving part (P1) are in triangular distribution.

7. The prism driving apparatus according to claim 1 or 2 or 3 or 4, characterized by, The fixed-point moving part (P1) has an arc convex surface, and the base (1) and / or the movable frame (2) is provided with a groove in movable contact with the arc convex surface.

8. The prism driving apparatus according to claim 7, wherein The fixed-point moving part (P1) is any one of a spherical body, a hemispherical body and a column with an arc convex surface.

9. A camera module characterized by, The camera module comprises the prism driving device 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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