A lens driving device, a camera device, an electronic device

Abstract

The application discloses a lens driving device, a photographing device and an electronic device, and technical scheme points are as follows: a lens driving device comprises a base, a lens carrier and a shell, a telescopic mechanism for driving the lens carrier to telescopically extend and contract is arranged between the base and the lens carrier, the telescopic mechanism comprises a plurality of support bodies which are telescopically sleeved with each other, and a plurality of telescopic driving elements which are connected with the corresponding support bodies respectively and are used for driving the support bodies to telescopically extend and contract, the lens carrier is arranged on the innermost support body, and the support bodies slide perpendicularly to the direction of the base; and a damping mechanism for driving the image sensor to move is arranged between the base and the image sensor. The telescopic length of the lens carrier is increased by the support body structure, the advantages of large stroke, high photographing precision and small volume are realized, and the sensor translation type damping function is realized simultaneously.

Description

Technical Field

[0001] This invention relates to the field of photographic equipment, and more particularly to a lens driving device, a photographic device, and an electronic device. Background Technology

[0002] Camera modules with autofocus (AF) functionality are widely used in mobile electronic products such as digital cameras, mobile phones, or tablets.

[0003] With the advancement of cameras towards higher precision and magnification, optical image stabilization (OIS), such as that used to correct hand shakiness and vibration during smartphone photography and videography, is employing more complex methods to address these issues. Existing stabilization structures achieve this by controlling lenses, resulting in low accuracy in compensating for image beam jitter. Furthermore, lens drive mechanisms are limited by size, making it difficult to achieve large lens travel distances. Moreover, existing segmented lens drive mechanisms are complex and bulky, hindering the trend towards thinner and smaller lens drive devices.

[0004] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Summary of the Invention

[0005] The purpose of this invention is to provide a lens driving device, a photographic device, and an electronic device that achieves segmented extension and retraction through a support structure, thereby increasing the extension and retraction length of the lens carrier; and achieves the advantages of large stroke, high imaging accuracy, and small size, while also realizing sensor translational image stabilization function.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a lens driving device, comprising a base (1), a lens carrier (33), a housing (34), and an image sensor.

[0007] A telescopic mechanism for driving the lens carrier (33) to extend and retract in segments is provided between the base (1) and the lens carrier (33).

[0008] The telescopic mechanism includes several interconnected and telescopic support bodies and several telescopic drive elements that are respectively connected to the corresponding support bodies and used to drive the support bodies to extend and retract. The lens carrier (33) is located on the innermost support body, and the support body slides perpendicular to the base (1).

[0009] An anti-shake mechanism for driving the image sensor to move is provided between the base (1) and the image sensor;

[0010] Each of the supports is provided with a guide component for guiding the support.

[0011] The present invention is further configured such that: the lower end face of the support body is integrally formed with an outward protrusion (16) protruding from the outer side wall of the support body, and the upper end face of the support body is integrally formed with an inward protrusion (15) protruding from the inner side wall of the support body. The inward protrusion (15) connected to the same support body is higher than the outward protrusion (16). The outward protrusion (16) and the inward protrusion (15) between two adjacent support bodies can abut against each other and limit each other. The outward protrusion (16) of the outermost support body can abut against the inner wall of the outer shell (34).

[0012] The present invention is further configured such that: when the support body is configured to be at least three, a plurality of the telescopic drive elements are located between the innermost support body and the adjacent support body, the output end of the telescopic drive element is connected to the corresponding support body, the main body of the telescopic drive element is connected to the lower end face of the adjacent support body outside the corresponding support body, and the main body of the telescopic drive element connected to the outermost support body is fixed to the base (1).

[0013] The present invention is further configured such that: the guide assembly includes a guide rod and a sliding sleeve; the sliding sleeve is fixed to the side wall of the corresponding support body, the guide rod is vertically arranged and connected to the adjacent support body on the outside of the corresponding support body, and the guide rod corresponding to the outermost support body is fixedly connected to the base (1).

[0014] The present invention is further configured such that: the output end of the telescopic drive element is provided with a base (20) connected to the lower end face of the corresponding support body; when there is a support body between the telescopic drive element and the corresponding support body, the base (20) bypasses the support body and is fixed to the lower end face of the corresponding support body.

[0015] The present invention is further configured such that: when two supports are provided, the corresponding telescopic driving elements are located between the inner support and the outer support, the output end of the telescopic driving element is connected to the corresponding support, the main body of the telescopic driving element is connected to the outer support, and the main body of the telescopic driving element connected to the outer support is fixed to the base (1).

[0016] The present invention is further configured such that: the guide assembly is configured as two sets, each including a guide rod and a sliding sleeve, the sliding sleeve is fixed to the side wall of the corresponding support body, the guide rod corresponding to the inner support body is fixedly connected to the outer support body; the guide rod corresponding to the outer support body is fixed to the base (1).

[0017] The present invention is further configured such that: the anti-shake mechanism includes a sensor bracket (3) disposed on the base (1) and slidable relative to the base (1), a first driving element (4) disposed on the base (1) and driving the sensor bracket (3) to slide, and a second driving element (5) connected to the first driving element (4) and used to drive the sensor bracket (3) to slide perpendicular to the driving direction of the first driving element (4); the base (1) is slidably connected to a connecting frame (6), the connecting frame (6) is connected to the output end of the first driving element (4), and the second driving element (5) is disposed on the connecting frame (6).

[0018] The present invention is further configured as: a photographic apparatus having the above-described lens driving device.

[0019] The present invention is further configured as: an electronic device having the above-described photographic apparatus.

[0020] In summary, the present invention has the following beneficial effects:

[0021] When the lens carrier extends and retracts, the outer support body moves away from the base via an external drive element. The middle drive element is fixed to the outer support body, and the inner drive element is fixed to the middle support body. The middle drive element and the inner drive element drive the corresponding middle support body and the inner support body to extend and retract respectively. The segmented extension and retraction is achieved through the three support body structures, which increases the extension and retraction length of the lens carrier. In addition, the base structure allows the outer drive element, middle drive element, and inner drive element to be located between the inner support body and the middle support body, effectively saving the space occupied by the outer drive element, middle drive element, and inner drive element. The above structure achieves the advantages of large stroke, high imaging accuracy, and small size.

[0022] The inner guide component, middle guide component, and outer guide component guide the inner support body, middle support body, and outer support body, ensuring that the inner support body, middle support body, and outer support body move perpendicular to the base.

[0023] When the lens carrier extends and retracts, it simultaneously drives the sleeve to extend and retract, thus preventing dust from entering between the lens carrier and the image sensor and improving dustproof performance.

[0024] The first and second driving elements have the same structure and are both piezoelectric driving elements. The output ends of the first and second driving elements are set perpendicular to each other in the direction of movement. The sensor bracket slides in the plane of the base, thus realizing image sensor translational image stabilization (sensor translational image stabilization).

[0025] When stabilizing an image sensor, the first driving element drives the connecting frame, the second driving element, and the sensor bracket to translate (translation in the X-axis direction), while the second driving element drives the sensor bracket to slide perpendicular to the moving direction of the connecting frame (translation in the Y-axis direction), thereby achieving translational image sensor stabilization. In addition, the first and second driving elements are located at the corners of the base, which effectively reduces the space occupied by the entire stabilization structure and achieves miniaturization of the lens driving device. Attached Figure Description

[0026] Figure 1 This is an exploded schematic diagram of Example 1;

[0027] Figure 2 This is a cross-sectional view of Example 1. Figure 1 ;

[0028] Figure 3 This is a schematic diagram of Embodiment 1 with the outer shell and middle support body removed;

[0029] Figure 4 This is a schematic diagram of Embodiment 1 with the outer shell, middle support, and outer support removed;

[0030] Figure 5 This is a top view of Embodiment 1 with the outer shell, middle support, and outer support removed;

[0031] Figure 6 This is a cross-sectional view of Example 1. Figure 2 ;

[0032] Figure 7 This is a schematic diagram of the image stabilization mechanism in Example 1;

[0033] Figure 8 This is a schematic diagram showing the connection of the sensor bracket, the first driving element, the second driving element, and the connecting frame in the image stabilization mechanism of Embodiment 1;

[0034] Figure 9 This is a schematic diagram of the sensor bracket and connecting frame in Embodiment 1;

[0035] Figure 10 This is a schematic diagram of the extended state of the lens carrier in Example 1;

[0036] Figure 11 This is a schematic diagram of the lens carrier in the contracted state in Example 1.

[0037] The numbers in the diagram represent the following components: 1. Base; 3. Sensor bracket; 4. First driving element; 5. Second driving element; 6. Connecting frame; 7. Connecting piece; 8. Receiving cavity; 9. Base plate; 10. Limiting block; 11. Movable groove; 12. Inner support body; 13. Middle support body; 14. Outer support body; 15. Inner protrusion; 16. Outer protrusion; 17. Inner driving element; 18. Middle driving element; 19. Outer driving element; 20. Base support; 21. Inner guide assembly; 22. Inner guide rod; 23. Inner sliding sleeve; 24. Middle guide assembly; 25. Middle guide rod; 26. Middle sliding sleeve; 27. Outer guide assembly; 28. Outer guide rod; 29. ​​Outer sliding sleeve; 30. Outer fixing frame; 31. Middle fixing frame; 32. Sleeve; 33. Lens carrier; 34. Outer shell. Detailed Implementation

[0038] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to the figures and specific embodiments.

[0039] Example 1: A lens driving device includes a base 1, a lens carrier 33, and a housing 34. A telescopic mechanism for driving the lens carrier 33 to extend and retract in segments is provided between the base 1 and the lens carrier 33. An anti-shake mechanism for driving the image sensor to move is provided between the base 1 and the image sensor installed in the lens driving device.

[0040] The telescopic mechanism includes at least three interlocking and telescopic support bodies and at least three telescopic drive elements connected to the corresponding support bodies for driving their extension and retraction. The lens carrier 33 is located in the innermost support body, which slides perpendicular to the base 1. The telescopic drive elements can be piezoelectric drive elements, electromagnetic drive elements, etc. In this embodiment, piezoelectric drive elements are used. Three support bodies and three telescopic drive elements are used in this embodiment. Each support body has an integrally formed outer protrusion 16 protruding from its outer wall at its lower end and an integrally formed inner protrusion 15 protruding from its inner wall at its upper end. The outer protrusion 16 and the inner protrusion 15 can fit against the inner walls of adjacent support bodies. Furthermore, the outer protrusion 16 between two adjacent support bodies can abut against the inner protrusion 15, thereby achieving a locking function. This also limits the separation of two adjacent support bodies, improving the connection strength between them.

[0041] In this embodiment, the three supports, from the inside out, are: inner support 12, middle support 13, and outer support 14. The lens carrier 33 is fixed to the inner protrusion 15 of the inner support 12. Three telescopic drive elements are also provided, corresponding to the inner support 12, middle support 13, and outer support 14. These three telescopic drive elements are inner drive element 17, middle drive element 18, and outer drive element 19, all located between the inner support 12 and the middle support 13. The inner drive element 17 is fixed to the middle support 13 and its output end is connected to the inner support 12; the middle drive element 18 is fixed to the outer support 14 and its output end is connected to the inner support 12; and the outer drive element 19 is fixed to the base 1 and its output end is connected to the outer support 19.

[0042] The output ends of the external drive element 19, the middle drive element 18, and the internal drive element 17 are each provided with a base 20 that is fixed to the lower end of the corresponding external support body 14, the middle support body 13, and the internal support body 12, respectively. The base 20 is U-shaped, and the lower end face of the middle support body 13 can abut against or fit against the base 20 connected to the external support body 14.

[0043] When the lens carrier 33 extends and retracts, the outer support 14 is driven to move away from the base 1 by the outer drive element 19. The middle drive element 18 is fixed to the outer support 14, and the inner drive element 17 is fixed to the middle support 13. The middle drive element 18 and the inner drive element 17 drive the corresponding middle support 13 and inner support 12 to extend and retract, respectively. The segmented extension and retraction is achieved through the three support structures, increasing the extension and retraction length of the lens carrier 33. In addition, the base support 20 structure positions the outer drive element 19, the middle drive element 18, and the inner drive element 17 between the inner support 12 and the middle support 13, effectively saving the space occupied by the outer drive element 19, the middle drive element 18, and the inner drive element 17. The above structure achieves the advantages of large stroke, high imaging accuracy, and small footprint.

[0044] In this embodiment, to further improve the telescopic accuracy of the inner support 12, middle support 13, and outer support 14, the inner support 12, middle support 13, and outer support 14 are respectively connected to an inner guide assembly 21, a middle guide assembly 24, and an outer guide assembly 27. The inner guide assembly 21, middle guide assembly 24, and outer guide assembly 27 have identical structures. In this embodiment, the inner guide assembly 21, middle guide assembly 24, and outer guide assembly 27 are all set in two groups and arranged symmetrically. The outer guide assembly 27 includes an outer guide rod 28 fixed to the base 1 and an outer sliding sleeve 29 fixed to the outer support 14; the middle guide assembly 24 includes a middle guide rod 25 fixed to the outer support 14 and a middle sliding sleeve 26 fixed to the middle support 13; the inner guide assembly 21 includes an inner guide rod 22 fixed to the middle support 13 and an inner sliding sleeve 23 fixed to the inner support 12. The outer sliding sleeve 29, the middle sliding sleeve 26, and the inner sliding sleeve 23 are respectively connected to the outer protrusions 16 of the corresponding outer support body 14, middle support body 13, and inner support body 12.

[0045] An outer fixing frame 30 is fixed to the lower end face of the outer support body 14. The outer fixing frame 30 extends from directly below the middle support body 13 to between the inner support body 12 and the middle support body 13 and is fixedly connected to the middle guide rod 25. A middle fixing frame 31 is fixed to the middle support body 13 and is fixedly connected to the middle guide rod 25. The outer guide rod 28 is located outside the outer support body 14, and the middle guide rod 25 and the inner guide rod 22 are located between the inner support body 12 and the middle support body 13.

[0046] The inner guide component 21, the middle guide component 24, and the outer guide component 27 guide the inner support 12, the middle support 13, and the outer support 14, ensuring that the inner support 12, the middle support 13, and the outer support 14 move perpendicular to the base 1.

[0047] To achieve dust prevention, several interlocking sleeves 32 are provided between the base 1 and the lens carrier 33, with at least three sleeves 32. The first and last ends of the sleeves 32 are fixed to the lens carrier 33 and the base 1, respectively. When the lens carrier 33 moves in extension and retraction, the sleeves 32 move in extension and retraction simultaneously, thereby preventing dust from entering between the lens carrier 33 and the image sensor and improving dust prevention performance.

[0048] The image stabilization mechanism includes a sensor bracket 3 mounted on a base 1 and slidable relative to the base 1, a first driving element 4 mounted on the base 1 and driving the sensor bracket 3 to slide, and a second driving element 5 connected to the first driving element 4 and used to drive the sensor bracket 3 to slide perpendicular to the driving direction of the first driving element 4. The image sensor is fixed to the sensor bracket 3, and the sensor bracket 3 is located at the center of the base 1. In this embodiment, a sleeve 32 can be connected to the sensor bracket 3 to prevent dust from entering the image sensor. The first driving element 4 and the second driving element 5 have the same structure and are both piezoelectric driving elements. The output end of the first driving element 4 and the output end of the second driving element 5 are arranged perpendicularly to each other. The sensor bracket 3 slides within the plane of the base 1, thus achieving image sensor translational image stabilization (sensor translational image stabilization).

[0049] In this embodiment, the base 1 is slidably connected to the connecting frame 6, the output end of the first driving element 4 is fixedly connected to the connecting frame 6, and the second driving element 5 is installed on the connecting frame 6, and the output end of the second driving element 5 is connected to the sensor bracket 3.

[0050] The sensor bracket 3 is fixed with a connecting piece 7, which extends to the corner of the base 1 and is attached to the surface of the connecting frame 6 and can slide relative to it; the first driving element 4 and the connecting frame 6 are located at the corner of the base 1, and the output end of the second driving element 5 is fixed to the connecting piece 7.

[0051] During image stabilization, the first driving element 4 drives the connecting frame 6, the second driving element 5, and the sensor bracket 3 to translate (translation in the X-axis direction). At the same time, the second driving element 5 drives the sensor bracket 3 to slide perpendicular to the moving direction of the connecting frame 6 (translation in the Y-axis direction), thereby realizing image sensor translational image stabilization. In addition, the first driving element 4 and the second driving element 5 are located at the corner of the base 1, which effectively reduces the space occupied by the entire image stabilization structure and realizes the miniaturization of the lens driving device.

[0052] This embodiment is further configured such that a receiving cavity 8 for accommodating the movement of the sensor bracket 3 is provided at the center of the base 1, and a base plate 9 covering the receiving cavity 8 is fixed to the end face of the base 1 opposite to the lens. The receiving cavity 8 accommodates the sensor bracket 3, achieving a compact structure while facilitating the movement of the sensor bracket 3. Additionally, a limiting block 10 is integrally formed on the side wall of the sensor bracket 3. Several limiting blocks 10 are provided and evenly distributed on the side wall of the sensor. In this embodiment, four limiting blocks 10 are provided. Several movable slots 11 are provided on the side wall of the receiving cavity 8 to accommodate the movement of the corresponding limiting blocks 10. The four limiting blocks 10 and four movable slots 11 effectively limit the range of motion of the sensor bracket 3, preventing the entire lens driving device from malfunctioning due to excessive movement of the sensor bracket 3.

[0053] Example 2 differs from Example 1 in that: in this example, two supports are provided and nested together. The corresponding telescopic drive elements are located between the inner and outer supports. The output end of each telescopic drive element is connected to its corresponding support, and the main body of each telescopic drive element is connected to its outer support. The main body of the telescopic drive element connected to its outer support is fixed to the base 1. Two sets of guide components are provided, each including a guide rod and a sliding sleeve. The sliding sleeves of the two sets of guide components are respectively fixed to the sidewalls of the corresponding supports. The guide rod corresponding to the inner support is fixedly connected to the outer support; the guide rod corresponding to the outer support is fixed to the base 1.

[0054] Example 3: A photographic device having the lens driving device described in Example 1.

[0055] Example 4: An electronic device having the photographic apparatus described in Example 3.

[0056] In this document, the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," "outer," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used for the clarity of expressing the technical solution and for the convenience of description, and therefore should not be construed as limiting the present invention.

[0057] In this document, the terms “including,” “comprising,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A lens driving device, comprising a base (1), a lens carrier (33), and a housing (34), characterized in that: A telescopic mechanism for driving the lens carrier (33) to extend and retract in segments is provided between the base (1) and the lens carrier (33). The telescopic mechanism includes several interconnected and telescopic support bodies and several telescopic drive elements that are respectively connected to the corresponding support bodies and used to drive the support bodies to extend and retract. The lens carrier (33) is located on the innermost support body, and the support body slides perpendicular to the base (1). When the lens carrier (33) moves in extension and retraction, the outer support (14) is driven to move away from the base (1) by the outer drive element (19), the middle drive element (18) is fixed to the outer support (14), the inner drive element (17) is fixed to the middle support (13), and the corresponding middle support (13) and inner support (12) are driven to extend and retract by the middle drive element (18) and the inner drive element (17) respectively, so as to realize segmented extension and retraction and increase the extension and retraction length of the lens carrier (33); An anti-shake mechanism for driving the image sensor to move is provided between the base (1) and the image sensor; the anti-shake mechanism includes a sensor bracket (3) disposed on the base (1) and slidable relative to the base (1), a first driving element (4) disposed on the base (1) and driving the sensor bracket (3) to slide, and a second driving element (5) connected to the first driving element (4) and used to drive the sensor bracket (3) to slide perpendicular to the driving direction of the first driving element (4); Each of the supports is provided with a guide component for guiding the support; The guiding assembly includes a guide rod and a sliding sleeve; the sliding sleeve is fixed to the side wall of the corresponding support body, the guide rod is vertically arranged and connected to the adjacent support body on the outside of the corresponding support body, and the guide rod corresponding to the outermost support body is fixedly connected to the base (1); a number of sleeves (32) are provided between the base (1) and the lens carrier (33), and the first and last ends of the sleeves (32) are fixed to the lens carrier (33) and the base (1) respectively. When the lens carrier (33) moves in extension and retraction, the sleeves (32) are moved in extension and retraction simultaneously.

2. The lens driving device according to claim 1, characterized in that: The lower end face of the support body is integrally formed with an outward protrusion (16) protruding from the outer side wall of the support body, and the upper end face of the support body is integrally formed with an inward protrusion (15) protruding from the inner side wall of the support body. The inward protrusion (15) connected to the same support body is higher than the outward protrusion (16). The outward protrusion (16) and the inward protrusion (15) between two adjacent supports body can abut against each other and limit each other. The outward protrusion (16) of the outermost support body can abut against the inner wall of the outer shell (34).

3. A lens driving device according to claim 1 or 2, characterized in that: When the support body is set to at least three, several of the telescopic drive elements are located between the innermost support body and the adjacent support body. The output end of the telescopic drive element is connected to the corresponding support body, and the main body of the telescopic drive element is connected to the lower end face of the adjacent support body outside the corresponding support body. The main body of the telescopic drive element connected to the outermost support body is fixed to the base (1).

4. A lens driving device according to claim 3, characterized in that: The guide assembly includes a guide rod and a sliding sleeve; the sliding sleeve is fixed to the side wall of the corresponding support body, the guide rod is vertically arranged and connected to the adjacent support body on the outside of the corresponding support body, and the guide rod corresponding to the outermost support body is fixedly connected to the base (1).

5. A lens driving device according to claim 3, characterized in that: The output end of the telescopic drive element is provided with a base (20) that connects to the lower end face of the corresponding support. When there is a support between the telescopic drive element and the corresponding support, the base (20) bypasses the support and is fixed to the lower end face of the corresponding support.

6. A lens driving device according to claim 1 or 2, characterized in that: When the support body is set to two, the corresponding telescopic drive element is located between the inner support body and the outer support body. The output end of the telescopic drive element is connected to the corresponding support body, the main body of the telescopic drive element is connected to the outer support body, and the main body of the telescopic drive element connected to the outer support body is fixed to the base (1).

7. A lens driving device according to claim 6, characterized in that: The guide assembly is configured in two sets, each including a guide rod and a sliding sleeve. The sliding sleeve is fixed to the side wall of the corresponding support body, and the guide rod corresponding to the inner support body is fixedly connected to the outer support body; the guide rod corresponding to the outer support body is fixed to the base (1).

8. A lens driving device according to claim 1, characterized in that: The anti-shake mechanism includes a sensor bracket (3) disposed on the base (1) and slidable relative to the base (1), a first driving element (4) disposed on the base (1) and driving the sensor bracket (3) to slide, and a second driving element (5) connected to the first driving element (4) and used to drive the sensor bracket (3) to slide perpendicular to the driving direction of the first driving element (4); the base (1) is slidably connected to a connecting frame (6), the connecting frame (6) is connected to the output end of the first driving element (4), and the second driving element (5) is disposed on the connecting frame (6).

9. A photographic apparatus, characterized in that: The lens driving device has any one of claims 1 to 8.

10. An electronic device, characterized in that: It has the photographic apparatus as described in claim 9.

Images