Lens driving mechanism

Abstract

The utility model discloses a lens driving mechanism, which comprises a bottom plate, a movable part, a frame, an image sensor and a carrier, and the movable part is connected to the top surface of the bottom plate and is in rolling connection with the bottom plate. The bottom end of the frame is connected to the edge of the bottom plate and surrounds the movable part, and a limiting part is arranged in the frame and located above the movable part. And the image sensor is positioned on the top surface of the movable part. The carrier is located in the frame and located on the top face of the limiting piece, the carrier is arranged to be capable of moving in the vertical direction, the carrier is used for installing a lens, and the lens is aligned with the image sensor in the vertical direction.

Description

Technical Field

[0001] The utility model relates to the technical field of optical element driving, in particular to a lens driving mechanism. Background Art

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. These electronic devices are becoming more and more popular and are developing in the direction of convenient and thinner designs to provide users with more choices.

[0003] Some electronic devices with camera or video recording functions are provided with a lens driving mechanism to drive the optical components of the lens to move, thereby achieving an automatic focusing function.

[0004] In the prior art, the anti-shake function is generally achieved by driving the frame to move through magnets or coils. However, the coil installation is complicated and requires auxiliary circuits, and the magnets have a certain weight, which undoubtedly increases the weight of the entire lens drive mechanism and cannot meet the market demand for lightweight lens drive mechanisms. Utility Model Content

[0005] The utility model aims to provide a lens driving mechanism to solve the problems of the prior art.

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a lens driving mechanism, comprising:

[0007] Base plate;

[0008] A movable member, the movable member is connected to the top surface of the bottom plate and is rollably connected to the bottom plate;

[0009] A frame, the bottom end of which is connected to the edge of the bottom plate and is arranged around the movable part, and a limiting part is arranged in the frame, and the limiting part is located above the movable part;

[0010] An image sensor, wherein the image sensor is located on the top surface of the movable member;

[0011] A carrier is located in the frame and on the top surface of the limiting member. The carrier is configured to be movable in a vertical direction. The carrier is used to install a lens. The lens is aligned with the image sensor in a vertical direction.

[0012] In one embodiment, the framework comprises:

[0013] a first annular frame, the first annular frame being disposed around a radially outer side of the carrier; and

[0014] a second annular frame, wherein the bottom end of the second annular frame is connected to the bottom plate and is disposed around the movable member, and the top end of the second annular frame is connected to the bottom end of the first annular frame;

[0015] The limiting member is connected to the radial inner side of the first annular frame and is located at the bottom of the first annular frame.

[0016] In one embodiment, a mounting groove is provided on the bottom surface of the movable member;

[0017] The lens driving mechanism comprises a first piezoelectric mechanism, which is connected to the bottom plate and located in the mounting groove and can drive the movable part to move.

[0018] In one embodiment, the top surface of the movable member is flush with the top surface of the second annular frame;

[0019] The lens driving mechanism further includes a first circuit board, and the first circuit board includes:

[0020] a first part, the first part being connected to the first annular frame;

[0021] The second part, at least a part of the first part is elastic and one end of the second part is connected to the first part, and the other end of the second part is connected to the image sensor.

[0022] In one embodiment, the movable member includes along the vertical direction:

[0023] A support plate, the top surface of which is flush with the top surface of the second annular frame;

[0024] A movable plate, the movable plate is located on the bottom surface of the support plate and is rollingly connected to the bottom plate, and the movable plate extends radially beyond the radial outer side of the support plate;

[0025] A limiting ring is provided on the inner wall of the second annular frame, the limiting ring extends along the circumference of the second annular frame and surrounds the support plate, and the limiting ring is located above the movable plate;

[0026] The second portion is located above the limiting ring.

[0027] In one embodiment, a first rolling groove is provided on the bottom edge of the movable plate;

[0028] The top surface of the bottom plate is provided with a second rolling groove aligned with the first rolling groove in the vertical direction;

[0029] The lens driving mechanism further includes a rolling ball, and the rolling ball is located in the first rolling groove and the second rolling groove.

[0030] In one embodiment, the first rolling groove penetrates the movable plate;

[0031] The bottom of the ball is located in the second rolling groove, and the top of the ball abuts against the bottom surface of the limiting ring.

[0032] In one embodiment, a top surface of the limiting ring is lower than a top surface of the second annular frame.

[0033] In one embodiment, the first portion is a centrally symmetrical structure extending around the image sensor;

[0034] The image sensor is located inside the first part, and the distance from the radial outer side of the image sensor to the radial inner side of the first part is consistent;

[0035] The second part includes a plurality of connectors of the same shape, the plurality of connectors are evenly spaced around the circumference of the image sensor, and each of the connectors includes a first end, a second end, and a bending portion between the first end and the second end;

[0036] The bending portion is elastic;

[0037] The first end is connected to the first portion;

[0038] The second end is connected to the image sensor.

[0039] In one embodiment, the first annular frame and the second annular frame are both rectangular frames;

[0040] The first portion is in a rectangular ring shape and is located between the first ring frame and the second ring frame;

[0041] The image sensor is in the shape of a rectangular block;

[0042] The second part includes four connecting members, the bending portion is L-shaped, and the bending portions of the four connecting members are respectively located at the four corners of the first part, the first end of each connecting member is connected to one side of the first part, and the second end is connected to the side adjacent to the image sensor.

[0043] In one embodiment, the width of the first portion is the same as the thickness of the first annular frame and the thickness of the second annular frame.

[0044] In one embodiment, the mounting slot is located at the center of the movable member.

[0045] In one embodiment, the lens driving mechanism further includes a second piezoelectric mechanism, which is connected to the first annular frame and is used to drive the carrier to move in a vertical direction.

[0046] In one embodiment, the second piezoelectric mechanism is connected to one side of the first annular frame, and the inner wall of the other side of the first annular frame opposite to the second piezoelectric mechanism is provided with a first guide groove, and the first guide groove extends in a vertical direction;

[0047] A second guide groove is provided on the radial outer side of the carrier, and the second guide groove extends in the vertical direction and is aligned with the first guide groove;

[0048] The lens driving mechanism further includes a guide post extending in a vertical direction and located between the first guide groove and the second guide groove.

[0049] In one embodiment, the lens driving mechanism further includes a second circuit board, one end of the second circuit board is connected to the first piezoelectric mechanism, and the other end of the second circuit board is connected to the second circuit board.

[0050] In one embodiment, the lens driving mechanism further includes a third circuit board, and the third circuit board is connected to the second piezoelectric mechanism and the first circuit board.

[0051] The lens driving mechanism of the utility model utilizes two piezoelectric mechanisms to replace magnets and coils, which is not only simple in structure but also lighter in weight than the prior art and can ensure the stability of anti-shake and focusing. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 and Figure 2 It is an exploded view of a lens driving mechanism according to an embodiment of the utility model.

[0053] Figure 3 and Figure 4 yes Figure 1 An exploded view of the base plate, the movable member, the second annular frame, the first circuit board, the first piezoelectric mechanism, the image sensor and the second circuit board in the illustrated embodiment.

[0054] Figure 5 yes Figure 1 A perspective view of the first piezoelectric mechanism and the second circuit board in the illustrated embodiment.

[0055] Figure 6 yes Figure 1 An exploded view of the base plate, movable member, second annular frame, first circuit board, image sensor and second circuit board in the illustrated embodiment.

[0056] Figure 7 and Figure 8 yes Figure 1 An exploded view of the carrier, the first annular frame and the second piezoelectric mechanism in the illustrated embodiment.

[0057] Fig. 9 yes Figure 1 An assembly diagram of the first piezoelectric mechanism, the movable member, the second annular frame and the first circuit board in the illustrated embodiment.

[0058] Fig.10 yes Figure 1 Assembly diagram of the lens drive mechanism of the illustrated embodiment.

[0059] Fig.11 yes Fig.10 A cross-sectional view of the lens driving mechanism along line AA in the illustrated embodiment.

[0060] 1. lens drive mechanism; 2. bottom plate; 3. second rolling groove; 4. movable part; 5. movable plate; 6. support plate; 7. mounting groove; 8. first rolling groove; 9. ball bearing; 10. first image sensor; 11. first circuit board; 12. first part; 13. connecting part; 14. first end; 15. second end; 16. first section; 17. second section; 18. second circuit board; 19. third circuit board; 20. frame; 21. first annular frame; 22. second annular frame; 23. limiting ring; 24. limiting part; 25. center hole; 26. avoidance groove; 27. guide column; 28. accommodating groove; 29. ​​carrier; 30. second guide groove; 31. housing; 32. first piezoelectric mechanism; 33. elastic sheet; 34. piezoelectric block; 35. friction rod. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0062] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0063] The following will be combined with the accompanying drawings to describe the various embodiments of the present invention in detail, so as to more clearly understand the purpose, characteristics and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0064] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0065] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0066] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0067] The utility model relates to a lens driving mechanism 100, which comprises a base plate 1, a movable part 2, a frame 5, a carrier 6, an image sensor 3, two piezoelectric mechanisms, a plurality of circuit boards and a housing 7, wherein the base plate 1 is in a rectangular plate shape and the plane of the base plate 1 is perpendicular to a vertical axis, that is, the base plate 1 is in a plane plate shape extending in the horizontal direction. The housing 7 covers and is connected to the edge or radial outer side of the base plate 1, and forms a space with the base plate 1 for accommodating the movable part 2, the frame 5, the carrier 6, the image sensor and a plurality of circuit boards. The frame 5 is connected to the base plate 1 and is relatively fixedly connected to the base plate 1, the carrier 6 is installed in the frame 5 and can move in the vertical direction, the carrier 6 is used to install the lens, and the optical axis direction of the lens is the vertical direction. The movable part 2 is installed in the frame 5 and is located below the carrier 6, and the movable part 2 can move in the radial direction in the frame 5, that is, move in the horizontal direction. The image sensor 3 is located on the top surface of the movable part 2 and below the carrier 6, and the movable part 2 can drive the image sensor 3 to move when it moves, and make the image sensor 3 keep aligned with the optical axis of the lens, thereby playing an anti-shake effect. The two piezoelectric mechanisms drive the carrier 6 to move along the optical axis and the movable member 2 to move radially. A plurality of circuit boards are respectively connected to the image sensor 3 and the two piezoelectric mechanisms to supply power to the image sensor 3 and the two piezoelectric mechanisms. In addition, the housing 7 is also provided with an avoidance hole to avoid light entering the lens.

[0068] exist Figure 1 and Figure 2In the illustrated embodiment, the bottom plate 1 is in the shape of a rectangular plate, and the frame 5 is also in the shape of a rectangular frame and connected to the top edge of the bottom plate 1. The frame 5 is formed by assembling two annular frames, which are respectively defined as a first annular frame 51 and a second annular frame 52. The first annular frame 51 and the second annular frame 52 are both in the shape of rectangular annular frames, and the second annular frame 52 is connected to the top edge of the bottom plate 1, and the first annular frame 51 is superimposed on the top of the second annular frame 52.

[0069] The movable member 2 is located in the second annular frame 52 and is rollingly connected to the bottom plate 1 via a plurality of balls 25. The radial outer side of the movable plate 21 is spaced from the inner wall of the second annular frame 52. The spacing at least allows the movable plate 21 to move unhindered in the second annular frame 52. Specifically, as Figure 3 and Figure 4 As shown, the movable member 2 includes a support plate 22 and a movable plate 21. Both the movable plate 21 and the support plate 22 are rectangular plates and the support plate 22 is superimposed on the top surface of the movable plate 21. The support plate 22 and the movable plate 21 are integrally formed. The centers of the movable plate 21 and the support plate 22 overlap with the vertical axis, and the radial dimension of the movable plate 21 is greater than the radial dimension of the support plate 22, that is, the length of the four sides of the movable plate 21 is greater than the length of the four sides of the support plate 22, and the support plate 22 and the movable plate 21 form a step structure.

[0070] The bottom surface of the movable plate 21 is provided with four first rolling grooves 24, and the four first rolling grooves 24 are respectively close to the four corners of the movable plate 21. The top surface of the bottom plate 1 is provided with four second rolling grooves 11, and the four second rolling grooves 11 are respectively aligned with the four first rolling grooves 24 in the vertical direction. The four balls 25 are respectively located between the four first rolling grooves 24 and the four second rolling grooves 11, so that the movable plate 21 can move relative to the bottom plate 1 in the first direction or the second direction, the first direction and the second direction are perpendicular to each other, and the first direction and the second direction are respectively perpendicular to the vertical axis. In addition, the first direction and the second direction are also parallel to the adjacent two sides of the frame 5, the adjacent two sides of the movable member 2, or the adjacent two sides of the bottom plate 1.

[0071] A mounting groove 23 is also provided at the center of the bottom surface of the movable plate 21. One of the two piezoelectric mechanisms is located in the mounting groove 23, and the piezoelectric mechanism is defined as the first piezoelectric mechanism 81. Specifically, most of the first piezoelectric mechanism 81 is located in the mounting groove 23 and includes an elastic sheet 83, a piezoelectric block 84 and a friction rod 85. Both ends of the elastic sheet 83 are connected to the bottom plate 1. The piezoelectric block 84 is located in the mounting groove 23 and the bottom end is connected to the top surface of the elastic sheet 83. The friction rod 85 extends in the vertical direction and the bottom end of the friction rod 85 is connected to the top surface of the piezoelectric block 84, and the top end abuts against the top wall of the mounting groove 23. After the first piezoelectric mechanism 81 is energized, the elastic sheet 83 can generate high-frequency deformation, and then drive the movable plate 21 to move in the first direction or the second direction through the friction rod 85. By changing the current of the first piezoelectric mechanism 81, the movement direction of the movable plate 21 driven by the friction rod 85 can be changed.

[0072] The mounting groove 23 is located at the center of the movable plate 21 , and the axis of the friction rod 85 overlaps with the vertical axis, that is, the friction rod 85 abuts against the center of the movable plate 21 , and can apply force evenly to the movable plate 21 , thereby making the friction rod 85 drive the movable plate 21 to move more stably.

[0073] Optionally, a limit ring 53 is provided on the inner wall of the first annular frame 51, which extends along the circumference of the first annular frame 51 and is in the shape of a rectangular plate. The limit ring 53 extends around the outer side of the support plate 22 and is located above the movable plate 21 and is spaced apart from the movable plate 21. The radial outer side of the limit ring 53 is spaced apart from the support plate 22, and the spacing does not affect the movement of the support plate 22 along the first direction or the second direction.

[0074] The top surface of the limiting ring 53 is preferably lower than the top surface of the first annular frame 51, so that enough space can be left to accommodate the circuit board, which will be described in detail below.

[0075] The first rolling groove 24 passes through the top surface of the movable plate 21 in the vertical direction, the bottom of the ball 25 is located in the second rolling groove 11, and a portion of the top passes through the first rolling groove 24 and abuts against the bottom surface of the limit ring 53. It should be understood that the first rolling groove 24 is a curved surface structure, and part of the top of the first rolling groove 24 passes through the movable plate 21, that is, the top opening of the first rolling groove 24 is very small, only the top of the ball 25 is allowed to expose the top surface of the movable plate 21, and the ball 25 will not roll from the first rolling groove 24 to the outside of the movable plate 21.

[0076] As a preferred solution, the top surface of the support plate 22 is flush with the top surface of the second annular frame 52. The top surface of the support plate 22 is used to support the image sensor 3. The image sensor 3 is electrically connected to one of the circuit boards, which is defined as the first circuit board 41. A portion of the first circuit board 41 is connected to the image sensor 3, and the other portion is connected to the second annular frame 52. A portion of the first circuit board 41 is elastic and can drive the image sensor 3 to reset.

[0077] exist Figure 2-5 In the illustrated embodiment, the first circuit board 41 includes a first portion 411 and a second portion, the first portion 411 is annular and extends around the vertical axis, the first portion 411 is a sheet structure and is superimposed on the top surface of the second annular frame 52, the first portion 411 is located between the first annular frame 51 and the second annular frame 52, and is fixed by the first annular frame 51 and the second annular frame 52. The shape of the first portion 411 is basically consistent with the cross-sectional shape of the second annular frame 52 along the horizontal aspect, that is, the width of the first portion 411 is consistent with the thickness of the second annular frame 52. It should be understood that the first portion 411 only needs to be fixedly connected to the first annular frame 51 or the second annular frame 52 without affecting its function, and the specific shape of the first portion 411 is not limited.

[0078] The second part is elastic and is located in the ring of the first part 411 , and is used to connect the first part 411 and the image sensor 3 , and can drive the image sensor 3 to reset.

[0079] In addition, Figure 2-5 In the illustrated embodiment, the first portion 411 is in a rectangular ring shape, and the image sensor 3 is in a rectangular block shape and is located at the center of the first portion 411 , that is, the radial outer side of the image sensor 3 is at the same distance from the first portion 411 .

[0080] The second part includes four connecting members 412 of the same shape, the four connecting members 412 are evenly spaced around the above-mentioned vertical axis and each connecting member 412 includes a first end 414, a second end 415 and a bending portion 413, the first ends 414 of the four connecting members 412 are respectively connected to the inner wall of the first part 411, and the second ends 415 are respectively connected to the image sensor 3, and the second ends 415 are closer to the vertical axis than the first ends 414.

[0081] The two ends of the bending portion 413 are respectively connected to the corresponding first end 414 and second end 415. The bending portion 413 is in a bending state extending around the vertical axis, so that the bending portion 413 has elasticity, and the bending portion 413 is located above the limiting ring and can move above the limiting ring.

[0082] When the first piezoelectric mechanism 81 drives the movable part 2 to move along the first direction or the second direction, since the image sensor 3 is fixedly connected to the movable part 2, and the first ends 414 of the four connecting parts 412 are connected to the first part 411, and the first part 411 is fixed on the second annular frame 52, the movable part 2 will cause the bending part 413 to deform when it moves, and the bending part 413 will drive the movable part 2 to reset.

[0083] exist Figure 2-5 In the illustrated embodiment, the first end 414 of each connecting member 412 is connected to one side of the first portion 411, and the second end 415 is connected to one side of the image sensor 3, and the side of the image sensor 3 is adjacent to one side of the first portion 411, that is, the first end 414 and the second end 415 of each connecting member 412 are located at two adjacent sides of the first portion 411, and the first end 414 is connected to one of the sides, and the second end 415 is connected to the image sensor 3. In other words, the four first ends 414 of the four connecting members 412 are respectively connected to the four sides of the first portion 411, and the four second ends 415 are respectively connected to the four sides of the image sensor 3, and each first end 414 is spaced from the second end 415 on the same side, and the spacing between the first end 414 and the second end 415 is respectively located at the center of the side of the image sensor 3 and the center of the side of the first portion 411. For example, one of the first ends 414 is connected to the first side of the first portion 411, and one of the second ends 415 is connected to the first side of the image sensor 3. The first end 414 and the second end 415 are arranged at intervals and are located at the center of the first side of the first portion 411, and are also located at the center of the first side of the image sensor 3. Since the four connecting members 412 are evenly spaced, the other three first ends 414 and the corresponding second ends 415 are also located at the center of the side of the corresponding first portion 411 and the center of one side of the image sensor 3, and are not described in detail.

[0084] In addition, the bending portion 413 is in an L-shaped bending state and includes a first section 416 and a second section 417 connected to each other. The extension directions of the first section 416 and the second section 417 are respectively parallel to the two side edges adjacent to the first portion 411, and the four bending portions 413 are respectively located at the four corners of the first portion 411, that is, the corners of the four bending portions 413 are respectively located at the four corners of the first portion 411.

[0085] One end of the first section 416 of each bending portion 413 is connected to the first end 414, and the other end is connected to the second section 417, and the second section 417 is connected to the second end 415. The length of the first section 416 of the bending portion 413 is the same as the length of the second section 417, the width of the first section 416 is also the same as the width of the second section 417, the width of the first end 414 and the width of the second end 415 are also the same as the width of the first section 416 and the second section 417, and the deformation of the bending portion 413 will not cause tearing of a weak area. And the four connecting members 412 apply force evenly, which can ensure the stable resetting of the image sensor 3.

[0086] The first part 411 and the second part are both sheet-like structures and are preferably integrally formed, which can increase the strength and deformation stability of the second part.

[0087] It should be understood that in other embodiments, the bottom plate 1 may also be a circular plate, and the first annular frame 51 and the second annular frame 52 may also be circular frames, the first portion 411 of the first circuit board 41 is annular and is located between the first annular frame 51 and the second annular frame 52, and the second portion includes a plurality of connectors 412, the number of which may be three, four or more, and the plurality of connectors 412 are evenly spaced around the vertical axis, the first ends 414 of the plurality of connectors 412 are connected to the radial inner side of the first portion 411, and the second ends 415 are connected to the image sensor 3. In addition, the bending portion 413 of the second portion is in an arc-shaped bending state extending around the vertical axis, and the two ends of the bending portion 413 are respectively connected to the first end 414 and the second end 415.

[0088] In addition, the first part 411 may also be annular, and the image sensor 3 is a cylindrical block and is located at the center of the first part 411, and the radial outer side of the image sensor 3 is at the same distance from the first part 411. The multiple connecting members 412 of the second part are evenly spaced around the outer circumference of the image sensor 3 and are connected to the first part 411 and the image sensor 3 respectively.

[0089] That is to say, the first part 411 can also be set to other centrally symmetrical structures, and the image sensor 3 can also be set to other structures that match the first part 411. The multiple connecting parts 412 need to be evenly spaced, that is, to ensure that the multiple connecting parts 412 apply uniform force to the image sensor 3, and there is no need to strictly limit the specific shapes of the first part 411 and the image sensor 3.

[0090] In addition, the first circuit board 41 further includes a connection end extending to the outside. The connection end can pass through the housing 7 and extend to the outside of the housing 7 for connection with an external power source.

[0091] The first annular frame 51 is formed by four side plates connected end to end, wherein two pairs of side plates are located on both sides along the first direction, and the other two pairs of side plates are located on both sides along the second direction. A stopper 54 is also provided on the radial inner side of the first annular frame 51, and the stopper 54 extends around the circumference of the first annular frame 51 and is located above the first circuit board 41. Figure 6-7 In the illustrated embodiment, the limiting member 54 is in the shape of a plate centered on the vertical axis and is located near the bottom of the first annular frame 51. A center hole 541 is provided at the center of the limiting member 54. The center hole 541 is aligned with the lens to facilitate the light projected onto the lens to enter the image sensor 3.

[0092] The carrier 6 is located in the first annular frame 51 and on the top surface of the limiting member 54 . The limiting member 54 can limit the downward movement of the carrier 6 , that is, the carrier 6 can only move in the first annular frame 51 along the vertical direction.

[0093] Another piezoelectric mechanism is defined as a second piezoelectric mechanism 82 . The second piezoelectric mechanism 82 is connected to the first annular frame 51 and is used to drive the carrier 6 to move in a vertical direction, that is, along the optical axis direction, so as to drive the lens to focus.

[0094] Specifically, the second piezoelectric mechanism 82 operates on the same principle as the first piezoelectric mechanism 81, and also includes an elastic sheet 83, a piezoelectric block 84 and a friction rod 85. A side plate of the first annular frame 51 along the first direction is provided with a receiving groove 57, and the receiving groove 57 runs through the side plate. The elastic sheet 83 is installed in the receiving groove 57 and close to the outer side of the side plate. The piezoelectric block 84 is located in the receiving groove 57 and connected to the inner side of the elastic sheet 83. One end of the friction rod 85 is connected to the piezoelectric block 84, and the other end extends beyond the inner side of the side plate and abuts against the carrier 6. After the second piezoelectric mechanism 82 is energized, the elastic sheet 83 will generate high-frequency vibration, which will then drive the piezoelectric block 84 and the friction rod 85 to vibrate, thereby driving the carrier 6 to move in the vertical direction.

[0095] As a preferred solution, the accommodating groove 57 is located at the center of the side plate, that is, the second piezoelectric mechanism 82 is located at the center of the side plate along the second direction, so that the friction rod 85 is against the center of the side of the carrier 6 opposite to the side plate, which facilitates driving the carrier 6 to move more stably in the vertical direction.

[0096] Another side plate of the first annular frame 51 along the first direction is provided with two first guide grooves, and the side plate is arranged opposite to the side plate provided with the receiving groove 57, and the extension direction of the first guide groove is parallel to the vertical axis. In addition, the two first guide grooves are located near the two ends of the side plate along the second direction, and the projection of the second piezoelectric mechanism 82 along the first direction is located at the projection center of the two first guide grooves along the first direction.

[0097] Two second guide grooves 61 are provided on the radial outer side of the carrier 6 . The extension directions of the two second guide grooves 61 are respectively parallel to the vertical axis and aligned with the two first guide grooves along the first direction.

[0098] The two guide posts 56 extend in the vertical direction respectively and each guide post 56 is located between the first guide groove and the second guide groove 61 respectively.

[0099] The friction rod 85 of the second piezoelectric mechanism 82 moves in the vertical direction against the carrier 6, and the second guide groove 61 of the carrier 6 and the guide column 56 are in rolling contact, that is, the carrier 6 and the guide column 56 form rolling friction, which can reduce the static friction between the carrier 6 and the inner wall of the first annular frame 51, reduce the running load of the carrier 6, and ensure the stable movement of the carrier 6.

[0100] Among the multiple circuit boards, one of the circuit boards is L-shaped, and the circuit board is defined as the second circuit board 42. A portion of the second circuit board 42 is located on the top surface of the bottom plate 1 and one end is connected to the first piezoelectric mechanism 81, and the other end is bent in an L-shape and extends in the vertical direction to the first circuit board 41 and is connected to the first circuit board 41. An escape groove 55 is provided on the radial outer side of the second annular frame 52, and the escape groove 55 extends in the vertical direction and extends from the bottom end to the top end of the second annular frame 52. The other end of the second circuit board 42 is bent in an L-shape and is located in the escape groove 55.

[0101] Among the multiple circuit boards, another circuit board is used to be electrically connected to the second piezoelectric mechanism 82. The circuit board is the third circuit board 43. The third circuit board 43 is attached to the outer side of the first annular frame 51 and is located on the outer side of the elastic sheet 83 that accommodates the second piezoelectric mechanism 82. It is electrically connected to the second piezoelectric mechanism 82, and the bottom end of the third circuit board 43 is also connected to the first circuit board 41.

[0102] The lens driving mechanism 100 of the present invention utilizes two piezoelectric mechanisms to replace magnets and coils, which is not only simple in structure but also lighter in weight than the prior art and can ensure the stability of anti-shake and focusing.

[0103] Preferred embodiments of the present invention have been described in detail above, but it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide further embodiments.

[0104] These and other changes can be made to the embodiments in light of the above detailed description.In general, in the claims, the terms used should not be considered limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0105] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A lens driving mechanism, characterized in that: include: Base plate; A movable member, the movable member is connected to the top surface of the bottom plate and is rollingly connected to the bottom plate; A frame, the bottom end of which is connected to the edge of the bottom plate and is arranged around the movable part, and a limiting part is arranged in the frame, and the limiting part is located above the movable part; An image sensor, wherein the image sensor is located on the top surface of the movable member; A carrier is located in the frame and on the top surface of the limiting member. The carrier is configured to be movable in a vertical direction. The carrier is used to install a lens. The lens is aligned with the image sensor in a vertical direction.

2. The lens driving mechanism according to claim 1, characterized in that: The framework includes: a first annular frame, the first annular frame being disposed around a radially outer side of the carrier; and a second annular frame, wherein the bottom end of the second annular frame is connected to the bottom plate and is disposed around the movable member, and the top end of the second annular frame is connected to the bottom end of the first annular frame; The limiting member is connected to the radial inner side of the first annular frame and is located at the bottom of the first annular frame.

3. The lens driving mechanism according to claim 2, characterized in that: The bottom surface of the movable part is provided with a mounting groove; The lens driving mechanism comprises a first piezoelectric mechanism, which is connected to the bottom plate and located in the mounting groove and can drive the movable part to move.

4. The lens driving mechanism according to claim 3, characterized in that: The top surface of the movable member is flush with the top surface of the second annular frame; The lens driving mechanism further includes a first circuit board, and the first circuit board includes: a first part, the first part being connected to the first annular frame; The second part, at least a part of the first part is elastic and one end of the second part is connected to the first part, and the other end of the second part is connected to the image sensor.

5. The lens driving mechanism according to claim 4, characterized in that: The movable parts include: A support plate, the top surface of which is flush with the top surface of the second annular frame; A movable plate, the movable plate is located on the bottom surface of the support plate and is rollably connected to the bottom plate, and the movable plate extends radially beyond the radial outer side of the support plate; A limiting ring is provided on the inner wall of the second annular frame, the limiting ring extends along the circumference of the second annular frame and surrounds the support plate, and the limiting ring is located above the movable plate; The second portion is located above the limiting ring.

6. The lens driving mechanism according to claim 5, characterized in that: The bottom edge of the movable plate is provided with a first rolling groove; The top surface of the bottom plate is provided with a second rolling groove aligned with the first rolling groove in the vertical direction; The lens driving mechanism further includes a ball, and the ball is located in the first rolling groove and the second rolling groove.

7. The lens driving mechanism according to claim 6, characterized in that: The first rolling groove passes through the movable plate; The bottom of the ball is located in the second rolling groove, and the top of the ball abuts against the bottom surface of the limiting ring.

8. The lens driving mechanism according to claim 5, characterized in that: The top surface of the limiting ring is lower than the top surface of the second annular frame.

9. The lens driving mechanism according to claim 4, characterized in that: The first portion is a centrally symmetrical structure extending around the image sensor; The image sensor is located inside the first part, and the distance from the radial outer side of the image sensor to the radial inner side of the first part is consistent; The second part includes a plurality of connectors of the same shape, the plurality of connectors are evenly spaced around the circumference of the image sensor, and each of the connectors includes a first end, a second end, and a bending portion between the first end and the second end; The bending portion is elastic; The first end is connected to the first portion; The second end is connected to the image sensor.

10. The lens driving mechanism according to claim 9, characterized in that: The first annular frame and the second annular frame are both rectangular frames; The first portion is in a rectangular ring shape and is located between the first ring frame and the second ring frame; The image sensor is in the shape of a rectangular block; The second part includes four connecting members, the bending portion is L-shaped and the bending portions of the four connecting members are respectively located at the four corners of the first part, the first end of each connecting member is connected to one side of the first part, and the second end is connected to the side adjacent to the image sensor.

11. The lens driving mechanism according to claim 10, characterized in that: The width of the first portion is the same as the thickness of the first annular frame and the thickness of the second annular frame.

12. The lens driving mechanism according to claim 3, characterized in that: The mounting groove is located at the center of the movable member.

13. The lens driving mechanism according to claim 4, characterized in that: The lens driving mechanism further includes a second piezoelectric mechanism, which is connected to the first annular frame and is used to drive the carrier to move in a vertical direction.

14. The lens driving mechanism according to claim 13, characterized in that: The second piezoelectric mechanism is connected to one side of the first annular frame, and the inner wall of the other side of the first annular frame opposite to the second piezoelectric mechanism is provided with a first guide groove, and the first guide groove extends in a vertical direction; A second guide groove is provided on the radial outer side of the carrier, and the second guide groove extends in the vertical direction and is aligned with the first guide groove; The lens driving mechanism further includes a guide post extending in a vertical direction and located between the first guide groove and the second guide groove.

15. The lens driving mechanism according to claim 4, characterized in that: The lens driving mechanism further includes a second circuit board, one end of the second circuit board is connected to the first piezoelectric mechanism, and the other end of the second circuit board is connected to the second circuit board.

16. The lens driving mechanism according to claim 13, characterized in that: The lens driving mechanism further includes a third circuit board, and the third circuit board is connected to the second piezoelectric mechanism and the first circuit board.

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