Lens driving device, camera module and electronic equipment

Abstract

The invention relates to a lens driving device, a camera module and electronic equipment, and the device comprises a housing, a focusing carrier, an aperture which synchronously moves along with a focusing lens, and a flexible electric connecting piece which adaptively deforms when the aperture moves, and at least one part of the flexible electric connecting piece is connected to the aperture and supplies power to the aperture. And the other at least one part of the flexible electric connecting piece is connected to the shell. The lens driving device has the advantages that the lens driving device is directly set to be in open-loop control, so that the structural complexity of the lens driving device is greatly reduced, meanwhile, the aperture is externally connected with the flexible electric connecting piece for control, the manufacturing and mounting processes of the lens driving device are simpler and more convenient, the production cost is reduced, and the production efficiency is improved. And the flexible electric connecting piece can adapt to deformation during complex motions such as focusing and anti-shaking, and can supply power to the aperture. The external flexible electric connecting piece can be conveniently disassembled and assembled, so that the production efficiency is improved, and the later maintenance difficulty and cost are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3C product accessories, and in particular relates to a lens driving device, a camera module and an electronic device. Background Art

[0002] The aperture system is a control mechanism in cameras and camcorders that controls the lens aperture (the size of the aperture opening) to adjust the amount of light entering the sensor.

[0003] In the prior art, all integrated variable apertures are equipped with OIS motors with AF closed loops. The circuit part of the variable aperture is connected from the motor to the AF closed loop IC through a spring or fpc, and then led out through the spring. Because the AF closed loop itself requires the spring and circuit parts to be connected, the circuit structure of the variable aperture can be omitted. However, if the OIS motor is to be equipped with an AF open loop, the internal structure is extremely complex, and the spring needs to be divided into six sections and then connected to the base, which is very disadvantageous in assembly process and cost. Summary of the invention

[0004] The purpose of the present invention is to provide a lens driving device, a camera module and an electronic device that can solve the above-mentioned technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The lens driving device comprises a housing, a focus carrier for carrying a focus lens and moving in the housing along an optical axis, and an aperture that moves synchronously with the focus lens, and comprises a flexible electrical connector that adaptively deforms when the aperture moves, at least a portion of the flexible electrical connector is connected to the aperture and supplies power to the aperture, and at least another portion of the flexible electrical connector is connected to the housing.

[0006] Furthermore, at least two flexible electrical connectors are provided and are centrally symmetrically arranged relative to the center of the aperture.

[0007] Furthermore, the aperture includes a conductive member, at least a portion of which is extended along the circumference of the aperture, and the conductive member is connected to the flexible electrical connector.

[0008] Furthermore, the conductive member is divided into at least two parts and each part is connected to one of the flexible electrical connectors.

[0009] Furthermore, at least a portion of the flexible electrical connector has an adaptive deformation structure that can adaptively deform when the aperture moves synchronously with the lens.

[0010] Furthermore, the flexible electrical connector has a first part connected to the aperture, and the flexible electrical connector has a second part connected to the housing, the first part and the second part are connected via the adaptive deformation structure, and the adaptive deformation structure is a bending structure.

[0011] Furthermore, the conductive member and the flexible electrical connector are integrally formed.

[0012] Furthermore, at least a portion of the conductive member and the flexible electrical connector is a flat connection portion perpendicular to the optical axis direction, and at least another portion is a vertical connection portion parallel to the optical axis direction, and the flat connection portion and the vertical connection portion are connected by a curved portion with a curvature.

[0013] As an application solution, the present application also provides a lens driving device with an aperture, wherein the lens driving device is a lens driving device with open-loop control movement, wherein the aperture moves at least in the axial direction of the optical axis under the drive of the lens driving device, and the lens driving device with an aperture also includes the lens driving device for powering the aperture.

[0014] As an application solution, the present application also provides a camera module, which includes the lens driving device with an aperture, and the aperture is fixed to the incident light side of the focusing carrier of the lens driving device or the incident light side of the focusing lens.

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

[0016] Compared with the existing technology, the advantages of the present application are: the present device directly sets the lens driving device in open-loop control, thereby greatly reducing the structural complexity of the lens driving device, and at the same time controls the aperture external flexible electrical connector, making the manufacturing and installation process of the lens driving device simpler and reducing production costs, and the flexible electrical connector can adapt to deformation during complex movements such as focusing and anti-shake, and can also meet the power supply needs of the aperture.

[0017] The external flexible electrical connector can be easily disassembled and assembled to improve production efficiency and reduce the difficulty and cost of subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a left front view of the main structure assembly of the lens driving device of the present invention; Figure 2 It is a left rear view of the main structure of the lens driving device of the present invention; Figure 3 It is a top view of the main structure assembly of the lens driving device of the present invention; Figure 4 for Figure 3 Section line view of the main body of the lens driving device in the middle, section line view of AA; Figure 5 This is a design style diagram of the second flexible electrical connector in Example 1; Figure 6 It is a detailed diagram of the assembly of the main components of the aperture of the present invention; Figure 7 It is an assembly diagram of the main structure of the aperture blade of the present invention; Figure 8 It is a detailed diagram of the assembly of the main components inside the aperture bracket of the present invention; Fig. 9 This is a schematic diagram of an example of an electronic device in Embodiment 5.

[0019] In the figure, a lens driving device 1, a moving frame 10, a focusing carrier 11, a housing 12, an anti-shake driving component 13, a focusing driving component 14, an aperture 2, a conductive part 20, an aperture bracket 21, an aperture blade 22, an aperture driving frame 23, a memory alloy wire 24, a guide groove 25, a guide rod 26, a driving hole 27, a driving rod 28, a flexible electrical connector 3, an adaptive deformation structure 30, a first part 31, a second part 32, a focusing lens 4, an optical axis Z, and a plane xY. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0021] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0024] Embodiment 1

[0025] like Figure 1 and Figure 2 As shown, the lens driving device, wherein a lens driving device 1 for open-loop control movement is arranged at intervals on the light-emitting side of the aperture 2, and the open-loop control movement is, for example, focusing movement, etc., to reduce costs. Figure 4 As shown, the lens driving device 1 drives the moving frame 10 for anti-shake to move in a plane xY perpendicular to the optical axis Z, and a focus carrier 11 for the system to perform focusing movement is also arranged in the above-mentioned moving frame 10, and the focus carrier 11 is also used to carry the focus lens 4. In the present embodiment, the aperture 2 is at least partially fixedly connected to the focus lens 4, so as to achieve synchronous movement of the aperture 2 and the focus lens 4 (such as focusing movement and anti-shake movement), but is not limited to one fixing method, wherein the aperture 2 can also be partially fixedly connected to the focus carrier 11, and the two fixing methods can achieve the same operating effect. It is particularly noted that the above-mentioned moving frame 10 and the focus carrier 11 arranged in the moving frame 10 are both arranged in the housing 12.

[0026] The movable frame 10 is connected to the base of the lens driving device 1 by means of suspension wires or springs, etc. Of course, alternative means such as sliding shafts or balls can also be used, and the above methods are all prior art and will not be described in detail in this embodiment. The power for driving the movable frame 10 includes existing driving methods such as electromagnetic coils, piezoelectrics, and SMA.

[0027] The focus carrier 11 is connected to the moving frame 10 through front and rear springs (not shown in the figure), and the focus carrier 11 adopts existing driving methods such as electromagnetic coils to achieve the movement of the focus carrier 11 in the optical axis Z direction.

[0028] In order to achieve independent control of aperture size and reduce design complexity and production cost, Figure 3 As shown, an aperture conductive mechanism is used to supply power to the aperture 2 separately and externally, and the aperture conductive mechanism includes a flexible electrical connector 3, which can be a flexible FPC or a spring. The flexible electrical connector 3 can be adaptively deformed according to the real-time movement direction of the aperture 2 (in the optical axis Z direction and in the plane xY).

[0029] In some embodiments, at least a portion of the flexible electrical connector 3 extends from the outer wall of the aperture 2 into the aperture 2 and is used to supply power to the aperture 2. Due to the simplified structure, the replacement and maintenance costs can be greatly reduced when a failure occurs. Among them, at least a portion of the above-mentioned flexible electrical connector 3 can also be designed according to the actual spatial layout to extend from the side of the aperture 2 close to the lens driving device 1 into the aperture 2 and be used to supply power to the aperture 2, which can achieve the same operating effect.

[0030] As another embodiment, a hole may be opened in the side wall of the aperture 2 , and at least a portion of the flexible electrical connector 3 enters through the hole to supply power to the aperture 2 .

[0031] In some embodiments, at least a portion of the flexible electrical connector 3 is distributed at circumferential intervals in the circumferential direction of the aperture 2; Figure 3 As shown, two flexible electrical connectors 3 are symmetrically distributed on both sides of the aperture 2 with the optical axis Z as the center. Their distribution can provide stable power to the aperture 2 while ensuring the balance stability of the entire system, so that the system can operate stably in anti-shake and focusing.

[0032] At least one other part of the flexible electrical connector 3 is the conductive member 20 of the aperture 2. The conductive member 20 is annular and extends along the circumference of the aperture 2. Figure 5As shown, the design style of this flexible electrical connector 3 is similar to a tube structure with one end connected to the aperture 2. The flexible electrical connector 3 covers at least part of the shell 12 below the aperture 2, and its effect is the same as the first design form. The advantage of this design is that it can not only meet the power supply requirements, but also play the role of dust and water protection. The conductive member 20 can be an annular plane perpendicular to the optical axis Z, or a curved surface parallel to the optical axis Z. The conductive member 20 can be an entire annular plane or curved surface, or the annular plane or curved surface can be divided into at least two parts and connected to at least a part of a flexible electrical connector 3. In the above structure, the conductive member 20 is a part of the flexible electrical connector 3, and the two are integrally formed. In other embodiments, the conductive member 20 and the flexible electrical connector 3 can be formed separately and then welded and fixed.

[0033] Specifically, in order to achieve the purpose that the flexible electrical connector 3 can follow the lens driving device 1 to move and deform synchronously, as shown in FIG. Figure 4 As shown, at least a portion of the flexible electrical connector 3 is also provided with an adaptive deformation structure 30 capable of adaptive deformation. The adaptive deformation structure 30 is a bending structure, which is specifically manifested as follows Figure 4 As shown, the adaptive deformation structure 30 is designed as a wave structure with a serpentine bending in cross-sectional viewing angle. It has good ductility and deformation performance in the direction of the optical axis Z and in the plane xY. In a natural state, the adaptive deformation structure 30 can be bent back and forth multiple times in a direction parallel to the optical axis Z, or multiple times in a plane parallel to the plane xY, so that the flexible electrical connector 3 can stably and continuously provide power to the aperture 2 when the aperture 2 size needs to be adjusted. This design reduces the risk of electrical connection breakage caused by anti-shake and focusing movements, and improves the long-term reliability of the system, which is particularly important in a frequently moving working environment. Since the flexible electrical connector 3 has good bending properties, it can also be designed as an L-shaped structural style, which can better reduce the length of the flexible electrical connector 3 and reduce production costs, but can also meet the deformation requirements. In other embodiments, the adaptive deformation structure 30 can be set as a spring structure that is bent multiple times or once.

[0034] like Figure 4As shown, the flexible electrical connector 3 has a first part 31 connected to the aperture 2, and the flexible electrical connector 3 has a second part 32 that at least partially conforms to the outer peripheral surface of the housing 12, and the adaptive deformation structure 30 is connected between the first part 31 and the second part. The adaptive deformation structure 30, the first part 31 and the second part are all integrally formed, and preferably the first part 31 and the second part 32 are vertically distributed, so that the flexible electrical connector 3 can use space more flexibly and avoid crowded layout, especially in electronic equipment, to provide more installation space for other components; the first part 31 and the second part 32 are connected by the adaptive deformation structure 30, ensuring that the control circuits in the first part 31 and the second part 32 can operate stably. In other embodiments, the second part 32 is connected to the inner side of the housing 12, and at least part of the adaptive deformation structure 30 is also located inside the housing 12.

[0035] In this embodiment, the aperture 2 is provided with a conductive member 20 electrically connected to the first part 31 of the above-mentioned flexible electrical connector 3. The conductive member 20 is a ring plate fixed to the side of the aperture 2 close to the lens driving device 1 in this embodiment. In addition to providing circuit support for the control of the aperture 2, the conductive member 20 also plays a certain role in protecting the aperture. In this device, the conductive member 20 can be designed to be in a horizontal state parallel to the plane xY, or in a vertical state horizontal to the optical axis Z. The conductive member 20 can be a terminal or circuit board for powering the SMA, or a circuit board provided with a coil. When the conductive member 20 and the flexible electrical connector 3 are integrally formed, at least a portion of the conductive member 20 and the flexible electrical connector 3 is a flat connection portion perpendicular to the direction of the optical axis Z, and at least another portion is a vertical connection portion parallel to the direction of the optical axis Z. The flat connection portion and the vertical connection portion are connected by a curved portion with a curvature, and the curved portion is also integrally formed with the flat connection portion and the vertical connection portion.

[0036] As other implementation modes, the first portion 31 and the second portion 32 may form a non-vertical distribution state, which may also meet the use requirements.

[0037] In this embodiment, the focus of the lens driving device 1 with open-loop control movement is open-loop controlled, and the anti-shake can also be open-loop controlled to reduce the power supply cost and the manufacturing cost.

[0038] Secondly, the aperture conductive mechanism that is externally and directly connected to the aperture 2 can not only meet the deformation requirements of the aperture 2 during complex movements such as focusing and anti-shake, but also can stably supply power to the aperture 2 so that the aperture 2 can enclose different light holes.

[0039] Of course, in order to ensure stable power supply and convenient disassembly and assembly, the flexible electrical connector 3 of this embodiment is mostly exposed outside the lens driving device 1 and the aperture 2. This method can greatly reduce the manufacturing cost and the difficulty of disassembly and assembly, so as to improve production efficiency.

[0040] In addition, the flexible electrical connector 3 can, to a certain extent, provide flexible support for the aperture 2, thereby improving the stability of the aperture 2.

[0041] Embodiment 2

[0042] The structure and principle of this embodiment are basically the same as those of the first embodiment, and the difference lies in that, with respect to the lens driving device of the first embodiment, this embodiment describes other components of the lens driving device with an aperture.

[0043] In this embodiment, the lens driving device also includes a shell 12 for protecting and carrying the focus lens 4, the shell 12 includes a base and an outer shell buckled on the base, and a moving frame 10 for the focus lens 4 to perform anti-shake movement in the plane xY, and a focus carrier 11 for the focus lens 4 to perform focusing movement in the optical axis Z direction are provided in the shell 12, wherein the focus carrier 11 is at least partially connected to the moving frame 10 by an elastic spring.

[0044] An anti-shake drive component 13 for driving the moving frame 10 to move is also provided in the shell 12. Part of the anti-shake drive component 13 is provided on the moving frame 10, and the remaining part is provided on the shell 12. The anti-shake drive component 13 is, for example, an electromagnetic coil drive component. A focus drive component 14 is also provided between the moving frame 10 and the focus carrier 11. Part of the focus drive component 14 is provided on the moving frame 10, and the remaining part is provided on the focus carrier 11. The focus drive component 14 can be an electromagnetic coil focus drive component. Both the anti-shake drive component 13 and the focus drive component 14 are open-loop electromagnetic drives. In the present embodiment, the anti-shake drive component 13 and the focus drive component 14 can be directly driven by an external control circuit without providing a detection device for feedback, thereby effectively reducing the production cost and simplifying the structure of the entire system.

[0045] Embodiment 3

[0046] The structure and principle of this embodiment are basically the same as those of the first embodiment. The difference lies in that, with respect to the lens driving device of the first embodiment, this embodiment describes other main components related to the aperture.

[0047] like Figure 6As shown, the aperture 2 includes an aperture bracket 21 for carrying an aperture component, wherein aperture blades 22 are evenly distributed in a ring shape about the optical axis Z and are arranged on the apex of the aperture bracket 21, wherein an aperture driving bracket 23 rotatably connected to the aperture bracket 21 is also arranged in the aperture bracket 21, wherein the aperture driving bracket 23 is at least partially connected to the aperture blades 22; In this embodiment, if Figure 8 As shown, the aperture driving assembly for driving the aperture blades 22 in the aperture 2 can be electromagnetically driven or memory alloy driven, and can also be replaced with a stepping or piezoelectric driving mode according to the actual working environment, wherein at least a portion of the aperture driving assembly is connected to the aperture bracket 21, and at least a portion of the remaining aperture driving assembly is connected to the aperture driving frame 23, and at least a portion of the aperture driving assembly is electrically connected to the conductive member 20 or the first portion 31 of the flexible electrical connector 3 in the first embodiment. When the SMA memory alloy wire is used for driving, the terminal connecting the memory alloy wire and the portion of the conductive member 20 are welded and connected, and when the electromagnetic driving mode is used, the coil is arranged on the conductive member 20 and is bent along the circumference of the aperture 2.

[0048] Specifically, Figure 6-Figure 7 As shown, a guide assembly is provided between the aperture bracket 21 and the aperture blade 22, wherein the guide assembly includes a guide groove 25 and a guide rod 26 inserted in the guide groove 25, either the guide groove 25 or the guide rod 26 is provided on the aperture bracket 21, and the remaining one is provided on the aperture blade 22.

[0049] A driving assembly is provided between the aperture driving frame 23 and the aperture blades 22, wherein the driving assembly includes a driving hole 27 and a driving rod 28 rotatably connected to the driving hole 27, either the driving hole 27 or the driving rod 28 is provided on the aperture driving frame 23, and the remaining one is provided on the aperture blades 22.

[0050] Embodiment 4

[0051] Based on the lens driving device with aperture of the second embodiment, the camera module of this embodiment includes the lens driving device with aperture of the second embodiment.

[0052] The camera module is used in electronic devices, including 3C products, such as computers, mobile smart phones (such as mobile phones and tablets, etc.) and digital cameras. In this embodiment, the module is used as a camera imaging component of a mobile smart phone.

[0053] Embodiment 5

[0054] Based on the camera module of the fourth embodiment, the electronic device of this embodiment includes the camera module of the fourth embodiment.

[0055] like Fig. 9As shown, electronic devices are devices that use electrical energy to process, transmit and store information. They are widely used in various fields, including communications, computing, entertainment, medical care and industry. The camera part of an electronic device refers to a component used to capture images and videos. It is widely used in smart phones, tablets, surveillance systems, digital cameras and other devices.

[0056] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A lens driving device, comprising a housing, a focus carrier for carrying a focus lens (4) and moving in the housing along an optical axis (Z), and an aperture (2) moving synchronously with the focus lens (4), characterized in that: It comprises a flexible electrical connector (3) that adaptively deforms when the aperture (2) moves, at least a portion of the flexible electrical connector (3) is connected to the aperture (2) and supplies power to the aperture (2), and at least another portion of the flexible electrical connector (3) is connected to a housing.

2. The lens driving device according to claim 1, characterized in that: At least two flexible electrical connectors (3) are provided and are centrally symmetrically arranged relative to the center of the aperture (2).

3. The lens driving device according to claim 1, characterized in that: The aperture (2) comprises a conductive member (20), at least a portion of which is arranged to extend along the circumference of the aperture (2), and the conductive member (20) is connected to the flexible electrical connector (3).

4. The lens driving device according to claim 3, characterized in that: The conductive member (20) is divided into at least two parts and each part is connected to one of the flexible electrical connecting members (3).

5. The lens driving device according to claim 2 or 3, characterized in that: At least a portion of the flexible electrical connector (3) has an adaptive deformation structure (30) that can adaptively deform when the aperture (2) moves synchronously with the lens.

6. The lens driving device according to claim 5, characterized in that: The flexible electrical connector (3) comprises a first portion (31) connected to the aperture (2), and the flexible electrical connector (3) comprises a second portion (32) connected to the housing, the first portion (31) and the second portion (32) being connected via the adaptive deformation structure (30), and the adaptive deformation structure (30) is a bending structure.

7. The lens driving device according to claim 5, characterized in that: The conductive member (20) and the flexible electrical connector (3) are integrally formed.

8. The lens driving device according to claim 7, characterized in that: At least one portion of the conductive member (20) and the flexible electrical connector (3) is a flat connection portion perpendicular to the direction of the optical axis (Z), and at least another portion is a vertical connection portion parallel to the direction of the optical axis (Z), and the flat connection portion and the vertical connection portion are connected via a curved portion having a curvature.

9. A camera module, characterized in that: The camera module comprises a lens driving device with an aperture as described in any one of claims 1 to 8, and the aperture (2) is fixed to the incident light side of the focusing carrier of the lens driving device (1) or the incident light side of the focusing lens (4).

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

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