Optical element driving mechanism and frame assembly thereof

Abstract

The invention discloses an optical element driving mechanism and a frame assembly thereof, the optical element driving mechanism comprises a base and a frame assembly, and the base is provided with a prism; the frame assembly is located above the base, and the frame can move in the horizontal direction. The frame assembly comprises a frame and a carrier, and a first lens is installed in the frame. The carrier is annular and is movably connected with the frame in the vertical direction, and a second lens is installed in the ring of the carrier and located below the first lens.

Description

Technical Field

[0001] The present invention relates to the technical field of optical element driving, and in particular to an optical element driving mechanism and a frame assembly thereof. 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 lightweight designs to provide users with more choices.

[0003] Some electronic devices with camera or video recording functions are equipped with an optical element drive structure to drive optical components such as lenses to achieve autofocus and optical image stabilization functions. Light can pass through the aforementioned optical components to form an image on the photosensitive component.

[0004] In the optical element driving structure of the prior art, all the lenses are arranged on a carrier, and the carrier drives the multiple lenses to move together, but the light receiving range is relatively small and cannot meet the shooting requirements. Summary of the Invention

[0005] The object of the present invention is to provide an optical element driving mechanism and a frame assembly thereof to solve the problems of the prior art.

[0006] To solve the above technical problems, an embodiment of the present invention provides a framework component, including:

[0007] a frame, wherein a first lens is installed in the frame;

[0008] The carrier is annular and movably connected to the frame along a vertical direction, and a second lens is installed in the ring of the carrier, and the second lens is located below the first lens.

[0009] In one embodiment, the framework comprises:

[0010] an annular frame, the annular frame being annular; and

[0011] a mounting frame, the mounting frame being annular and mounted on the top surface of the annular frame;

[0012] The first lens is mounted in the ring of the mounting frame.

[0013] In one embodiment, a mounting groove is provided on one side of the annular frame, and a first coil assembly is installed in the mounting groove;

[0014] A first magnet group is provided outside the carrier. The first magnet group is aligned with the first coil group and cooperates with the first coil group to drive the carrier to move in a vertical direction.

[0015] In one embodiment, the frame assembly further comprises:

[0016] a first circuit board, the first circuit board being attached to the outside of the first coil assembly and electrically connected to the first coil assembly;

[0017] An adsorption metal sheet is attached to the outside of the first circuit board and is used to adsorb the first magnet group.

[0018] In one embodiment, two guide shafts are installed on the inner side of the annular frame, and the two guide shafts are respectively located on both sides of the first coil group and their axes extend in the vertical direction;

[0019] The carrier is in rolling connection with the guide shaft.

[0020] In one embodiment, a mounting plate is provided on the radial outer side of the mounting frame, and the mounting plate covers the top surface of the annular frame and is connected to the annular frame.

[0021] In one embodiment, the carrier is located below the mounting frame and an anti-collision colloid is provided on the top surface.

[0022] The present invention also relates to an optical element driving mechanism, comprising:

[0023] a base, wherein a prism is mounted on the base;

[0024] The frame assembly is located above the base, and the frame can move horizontally.

[0025] In one embodiment, the bottom surface of the base is provided with a mounting hole recessed into the top surface, and the mounting hole is located below the second lens;

[0026] The prism is located in the mounting hole.

[0027] In one embodiment, the optical element driving mechanism further comprises a plurality of suspension wires;

[0028] The bottom ends of the plurality of suspension wires are connected to the base, and the top ends are connected to the frame assembly.

[0029] In one embodiment, the frame assembly further comprises a reed connected to the frame;

[0030] The top ends of the plurality of suspension wires are connected to the spring.

[0031] In one embodiment, the top surface of the base is provided with a plurality of grooves;

[0032] The frame is provided with a plurality of avoidance holes;

[0033] The bottom ends of the plurality of suspension wires are connected to the bottom wall of the groove, and the top ends thereof pass through the plurality of avoidance holes and are connected to the spring sheets.

[0034] In one embodiment, the frame assembly further comprises:

[0035] a first coil assembly connected to the frame;

[0036] a first magnet group connected to the carrier and cooperating with the first coil group to drive the carrier to move in a vertical direction;

[0037] A first circuit board is attached to the outside of the first coil assembly and is electrically connected to the first coil assembly.

[0038] In one embodiment, the base is provided with built-in circuitry;

[0039] The optical element driving mechanism further comprises:

[0040] a second circuit board, the second circuit board being stacked on a top surface of the base and electrically connected to the built-in circuit;

[0041] a second coil assembly electrically connected to the second circuit board; and

[0042] The second magnet group is connected to the frame and cooperates with the second coil group to drive the frame to move horizontally.

[0043] In one embodiment, the bottom end of the suspension wire is electrically connected to the built-in circuit;

[0044] The spring is electrically connected to the first circuit board.

[0045] In one embodiment, the frame is rollably connected to the base.

[0046] In one embodiment, the cross-section of the prism along the vertical direction is trapezoidal and the top surface of the prism is larger than the bottom surface.

[0047] In one embodiment, the optical element driving mechanism further comprises a housing, wherein the housing covers the outside of the frame assembly and the bottom end of the housing is connected to the base;

[0048] The housing is provided with a through hole;

[0049] The framework includes:

[0050] Ring frame, and

[0051] A mounting frame, the mounting frame being annular and mounted on the top surface of the annular frame, with the top portion extending through the through hole to the outside of the housing;

[0052] The first lens is mounted in the ring of the mounting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a perspective view of an optical element driving mechanism according to an embodiment of the present invention.

[0054] Figure 2 yes Figure 1 Exploded view of the optical element drive mechanism in the illustrated embodiment.

[0055] Figure 3 yes Figure 1 A perspective view of the optical element driving mechanism in the illustrated embodiment without the prism.

[0056] Figure 4 、 Figure 5 and Figure 6 They are Figure 1 An exploded view of the optical element drive mechanism in the illustrated embodiment without the prism.

[0057] Figure 7 yes Figure 1 Exploded view of the base, second circuit board and four suspension wires in the illustrated embodiment.

[0058] Figure 8 yes Figure 1 Assembly view of the frame assembly in the illustrated embodiment.

[0059] Figure 9 、 Figure 10 and Figure 11 yes Figure 8 Exploded view of the frame assembly in the illustrated embodiment.

[0060] Figure 12 yes Figure 8 Exploded view of the frame, guide shaft, first coil assembly, and first circuit board in the illustrated embodiment.

[0061] Figure 13 yes Figure 8 A perspective view of the annular frame in the illustrated embodiment.

[0062] Figure 14 This is a perspective view of a metal frame built into a ring frame according to an embodiment of the present invention.

[0063] Figure 15 yes Figure 1 A perspective view of the optical element driving mechanism in the illustrated embodiment without the prism.

[0064] Figure 16 yes Figure 15 The cross-sectional view of the optical element driving mechanism along line AA in the illustrated embodiment is shown without the prism.

[0065] Figure numerals: 100, optical element driving mechanism; 1, base; 11, mounting hole; 12, front opening; 13, groove; 14, ball bearing; 15, suspension wire; 2, frame; 21, annular frame; 211, avoidance groove; 212, avoidance hole; 213, mounting groove; 214, supporting protrusion; 22, mounting frame; 23, mounting plate; 24, guide shaft; 25, first coil group; 26, first circuit board; 27, adsorption metal sheet; 28, built-in metal frame; 281, built-in bottom plate; 29, second magnet group; 3, carrier; 31, first magnet group; 32, anti-collision colloid; 4, reed; 5, housing; 51, through hole; 6, prism; 61, front side; 62, rear side; 7, second circuit board; 9, coil plate; 91, second coil group; DETAILED DESCRIPTION

[0066] To make the objectives, technical solutions, and advantages of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to facilitate a better understanding of the present application. However, even without these technical details and the various variations and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be implemented.

[0067] 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, that is, should be interpreted to mean "including, but not limited to."

[0068] The following will describe in detail various embodiments of the present invention in conjunction with the accompanying drawings to provide a clearer understanding of the objectives, features 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.

[0069] Reference throughout this specification to "one embodiment" or "an embodiment" means 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 this 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.

[0070] 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.

[0071] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but words such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0072] The present invention relates to an optical element driving mechanism 100 and a frame assembly thereof. The optical element driving mechanism 100 includes a base 1 , a frame assembly, four suspension wires 15 and a housing 5 .

[0073] The bottom surface of the base 1 is provided with a mounting hole 11 recessed to the top surface, and the mounting hole 11 has a front opening 12 that opens toward the front side of the base 1. The mounting hole 11 is used to mount the prism 6.

[0074] The prism 6 has front and rear side surfaces 62, a top surface, and a bottom surface. The vertical cross-section of the prism 6 is trapezoidal. The front side 61 and the rear side 62 are inclined surfaces for reflecting light. The top surface of the prism 6 is larger than the bottom surface. The prism 6 is fixedly mounted in the mounting hole 11, and the front side of the prism 6 extends from the front opening 12 of the mounting hole 11 to the outside of the base 1.

[0075] The base 1 is provided with a built-in circuit, which is used to be electrically connected to an external power source.

[0076] The base 1 is generally in the shape of a rectangular plate with a certain thickness. The four corners of the base 1 are respectively provided with grooves 13 that are recessed toward the bottom.

[0077] The bottom ends of the four suspension wires 15 are respectively connected to the bottom wall of the groove 13 and electrically connected to the internal circuit, with the top ends extending upward. In other embodiments, the bottom ends of the four suspension wires 15 can also be directly connected to the top surface of the base 1. Providing the base 1 with the groove 13 and positioning the bottom ends of the four suspension wires 15 within the groove 13 can extend the length of the suspension wires 15 and increase the range of movement of the suspension wires 15.

[0078] The top surface of the base 1 is provided with four ball rolling grooves, which can be formed by the grooves 13 on the top surface of the base 1, or a protruding boss can be provided on the top surface of the base 1, and the top surface of the boss is recessed to form the ball rolling grooves.

[0079] Four ball grooves are located at the four corners of the base 1 and radially inward of the four grooves 13. A rolling ball 14 is installed in each ball groove. The four balls 14 are used to roll and support the frame assembly. This facilitates the frame assembly to move in the horizontal direction. The vertical direction is the direction of the optical axis.

[0080] The frame assembly includes a frame 2, a carrier 3 and four springs 4, wherein the frame 2 is used to install the first lens and includes an annular frame 21 and a mounting frame 22. The annular frame 21 is a rectangular ring and has a light-proof hole. The annular frame 21 is located on the top surface of the base 1. The annular frame 21 is rollably connected to the base 1 through four balls 14.

[0081] The mounting frame 22 is also annular and is located on the top surface of the annular frame 21. The mounting frame 22 is fixedly connected to the top surface of the frame 2 via a mounting plate 23. Specifically, the mounting plate 23 is a plate-shaped plate that surrounds the radial outside of the mounting frame 22 and covers and is connected to the top surface of the frame 2.

[0082] In the embodiment shown in the figure, the top surface of the frame 2 is provided with a plurality of mounting posts, and the mounting plate 23 is provided with a plurality of mounting holes 11 connected to the mounting posts. In other embodiments, the mounting plate 23 can be connected to the annular frame 21 in other ways. Of course, the mounting plate 23 and the annular frame 21 can also be configured as an integral molding, with the first lens mounted within the ring of the frame 2 and close to the top surface of the frame 2.

[0083] The center hole of the mounting frame 22, the light-shielding hole of the frame 2 and the top surface of the prism 6 are aligned. A first lens is installed in the center hole of the mounting frame 22, and the first lens is used to receive external light.

[0084] The four springs 4 are respectively located at the four corners of the annular frame 21 and are connected to the annular frame 21 via other mounting posts.

[0085] The four corners of the annular frame 21 are respectively provided with an avoidance groove 211 and an avoidance hole 212 . The avoidance groove 211 is located below the reed 4 to facilitate the movement of the reed 4 .

[0086] The avoidance hole 212 is formed by the bottom wall of the avoidance groove 211 being recessed into the bottom wall of the annular frame 21. The top ends of the four suspension wires 15 pass through the four avoidance holes 212 and are connected to the four springs 4. After the annular frame 21 moves, the four suspension wires 15 can drive the annular frame 21 to reset.

[0087] Carrier 3 is annular and located within annular frame 21, below mounting bracket 22 and mounting plate 23. The interior of the ring of carrier 3 is used to mount a second lens. The second lens is coaxially arranged with the first lens, and the second lens, first lens, and prism 6 are vertically aligned. External light enters the first lens and is then projected onto the second lens. Because the first lens can move horizontally with frame 2, it can receive a large amount of external light. Light passes through the first lens, is projected onto the second lens, and then onto the top surface of prism 6. After passing through the top surface of prism 6, it is refracted to the front and rear side surfaces 62, and then refracted again to the bottom surface of prism 6, where it is focused, forming a stable beam of light.

[0088] Light can be turned 180 degrees through the prism 6 and enter the image chip on the motor camera module to achieve the imaging effect. This design can reduce the overall thickness of the camera, making mobile phones or other smart devices thinner.

[0089] The carrier 3 can drive the second lens to move in the vertical direction. After the second lens moves in the AF direction, the distance between the second lens and the first lens changes, thereby achieving an adjustment effect of focusing light.

[0090] exist Figure 1-10 In the illustrated embodiment, a mounting groove 213 is provided on one side of the annular frame 21. The mounting groove 213 is formed by a depression in the top surface of the annular frame 21. A first coil assembly 25, a first circuit board 26, and an adsorption metal sheet 27 are mounted in the mounting groove 213. The first coil assembly 25, the first circuit board 26, and the adsorption metal sheet 27 are stacked in sequence from the inside to the outside, with the first coil assembly 25 located innermost and electrically connected to the first circuit board 26.

[0091] The first circuit board 26 is electrically connected to the reed 4 , and is electrically connected to the built-in circuit of the base 1 through the reed 4 and the suspension wire 15 .

[0092] A first magnet group 31 is provided on the radial outer side of the carrier 3 . The first magnet group 31 and the first coil group 25 are aligned with each other in the horizontal direction and cooperate with the first coil group 25 to drive the carrier 3 to move in the vertical direction.

[0093] The first magnet group 31 is also aligned with the attraction metal sheet 27 to attract the first magnet group 31 , thereby attracting the carrier 3 to the side of the annular frame 21 where the first coil group 25 is disposed.

[0094] In addition, two rolling guide shafts 24 are provided on one side of the mounting groove 213 of the annular frame 21. The axes of the two guide shafts 24 extend in the vertical direction and the two guide shafts 24 are located on both sides of the mounting groove 213. The carrier 3 touches the two guide shafts 24 during the movement in the vertical direction and comes into rolling contact with the two guide shafts 24 to avoid direct contact with the annular frame 21.

[0095] Anti-collision colloids 32 are respectively provided on the top and bottom surfaces of the carrier 3 . When the carrier 3 moves in the vertical direction, the anti-collision colloids 32 can buffer the force of the carrier 3 touching the mounting frame 22 and the base 1 .

[0096] The ring frame 21 is further provided with an internal metal frame 28, which is annular and embedded in the ring frame 21. The internal metal frame 28 has multiple bends to enhance the strength of the ring frame 21. The internal metal frame 28 is electrically connected to the spring 4 and the first circuit board 26.

[0097] A second magnet group 29 is also provided in the annular frame 21, and a second circuit board 7 and a coil plate 9 are also provided on the top surface of the base 1. The second circuit board 7 is located on the top surface of the base 1 and is electrically connected to the built-in circuit of the base 1. The coil plate 9 is located on the top surface of the second circuit board 7 and is provided with a second coil group 91 inside. The second coil group 91 cooperates with the second magnet group 29 to drive the frame 2 to move in the horizontal direction to play an anti-shake role.

[0098] Furthermore, an adsorption metal sheet 27 is embedded within the base 1. This creates an attractive force between the metal sheet 27 and the second magnet assembly 29 at the bottom of the annular frame 21, forcing the bottom of the frame 2 into contact with the ball bearings 14. A chip clearance groove 211 is provided on the sidewall of the base 1 to accommodate the control chip at the bottom of the second circuit board 7. This chip controls the operation of the first coil assembly 25 and the second coil assembly 91.

[0099] Housing 5 covers the exterior of the frame assembly and is connected at its bottom end to the radially outer side of base 1. A through-hole 51 is provided on the top surface of housing 5, allowing light to project through through-hole 51 to the first lens and then into the second lens. A position sensor is housed within second circuit board 7 and cooperates with second magnet assembly 29 at the bottom of annular frame 21 to monitor its position.

[0100] A supporting protrusion 214 is provided at the bottom end of the annular frame 21 , and a built-in bottom plate 281 is embedded in the supporting protrusion 214 . The built-in bottom plate 281 contacts the ball bearings 14 on the base 1 to achieve a supporting effect. At the same time, the built-in bottom plate 281 can enhance the structural strength of the annular frame 21 .

[0101] In the embodiment shown in the figure, the top of the mounting bracket 22 extends from the through hole 51 to the outside of the housing 5. The through hole 51 is used to avoid the mounting bracket 22, and the light directly enters the first lens.

[0102] While preferred embodiments of the present invention have been described in detail above, 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.

[0103] 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 construed as limited to the specific embodiments disclosed in the specification and claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which these claims are entitled.

[0104] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and that 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 frame assembly, characterized in that: include: a frame, wherein a first lens is installed in the frame; The carrier is annular and movably connected to the frame along a vertical direction, and a second lens is installed in the ring of the carrier, and the second lens is located below the first lens.

2. The frame assembly according to claim 1, wherein: The framework includes: an annular frame, the annular frame being annular; and a mounting frame, the mounting frame being annular and mounted on the top surface of the annular frame; The first lens is mounted in the ring of the mounting frame.

3. The frame assembly according to claim 2, wherein: A mounting groove is provided on one side of the annular frame, and a first coil assembly is installed in the mounting groove; A first magnet group is provided outside the carrier. The first magnet group is aligned with the first coil group and cooperates with the first coil group to drive the carrier to move in a vertical direction.

4. The frame assembly according to claim 3, wherein: The frame assembly further comprises: a first circuit board, the first circuit board being attached to the outside of the first coil assembly and electrically connected to the first coil assembly; An adsorption metal sheet is attached to the outside of the first circuit board and is used to adsorb the first magnet group.

5. The frame assembly according to claim 4, wherein: Two guide shafts are installed on the inner side of the annular frame, and the two guide shafts are respectively located on both sides of the first coil group and their axes extend in the vertical direction; The carrier is in rolling connection with the guide shaft.

6. The frame assembly according to claim 2, wherein: A mounting plate is provided on the radial outer side of the mounting frame, and the mounting plate covers the top surface of the annular frame and is connected to the annular frame.

7. The frame assembly according to claim 2, wherein: The carrier is located below the mounting frame and has an anti-collision colloid on its top surface.

8. An optical element driving mechanism, characterized in that: include: A base having a prism mounted thereon ； The frame assembly of claim 1, wherein the frame assembly is located above the base, and the frame is movable in a horizontal direction.

9. The optical element driving mechanism according to claim 8, wherein: The bottom surface of the base is provided with a mounting hole recessed to the top surface, and the mounting hole is located below the second lens; The prism is located in the mounting hole.

10. The optical element driving mechanism according to claim 8, wherein: The optical element driving mechanism further includes a plurality of suspension wires; The bottom ends of the plurality of suspension wires are connected to the base, and the top ends are connected to the frame assembly.

11. The optical element driving mechanism according to claim 10, wherein: The frame assembly further includes a reed connected to the frame; The top ends of the plurality of suspension wires are connected to the spring.

12. The optical element driving mechanism according to claim 11, wherein: The top surface of the base is provided with a plurality of grooves; The frame is provided with a plurality of avoidance holes; The bottom ends of the plurality of suspension wires are connected to the bottom wall of the groove, and the top ends thereof pass through the plurality of avoidance holes and are connected to the spring sheets.

13. The optical element driving mechanism according to claim 11, wherein: The frame assembly further comprises: a first coil assembly connected to the frame; a first magnet group connected to the carrier and cooperating with the first coil group to drive the carrier to move in a vertical direction; A first circuit board is attached to the outside of the first coil assembly and is electrically connected to the first coil assembly.

14. The optical element driving mechanism according to claim 13, wherein: The base is provided with a built-in circuit; The optical element driving mechanism further comprises: a second circuit board, the second circuit board being stacked on a top surface of the base and electrically connected to the built-in circuit; a second coil assembly electrically connected to the second circuit board; and The second magnet group is connected to the frame and cooperates with the second coil group to drive the frame to move horizontally.

15. The optical element driving mechanism according to claim 14, wherein: The bottom end of the suspension wire is electrically connected to the built-in circuit; The spring is electrically connected to the first circuit board.

16. The optical element driving mechanism according to claim 10, wherein: The frame is rollably connected to the base.

17. The optical element driving mechanism according to claim 10, wherein: The cross section of the prism along the vertical direction is trapezoidal and the size of the top surface of the prism is larger than the size of the bottom surface.

18. The optical element driving mechanism according to claim 10, wherein: The optical element driving mechanism further includes a housing, which covers the outside of the frame assembly and has a bottom end connected to the base; The housing is provided with a through hole; The framework includes: Ring frame, and A mounting frame, the mounting frame being annular and mounted on the top surface of the annular frame, with the top portion extending through the through hole to the outside of the housing; The first lens is mounted in the ring of the mounting frame.

Images