Lens driving mechanism

Abstract

The utility model discloses a lens driving mechanism, which comprises a base, a plurality of suspension wires, a frame, a carrier and an upper reed, the base comprises a bottom plate, a support and a built-in metal frame, the top surface of the bottom plate is provided with a plurality of grooves, and the support is positioned on the top surface of the bottom plate and is integrally formed with the bottom plate. The built-in metal frame comprises a plurality of conductive wires, each conductive wire comprises a middle section and connecting sections located at the two ends of the middle section, and the middle sections of the conductive wires are located on the same horizontal plane and located in the bottom plate or / and the support. And the connecting sections of part of the conductive wires are bent downwards by a preset distance to form another connecting end positioned below the horizontal plane. And the plurality of grooves are formed by respectively sinking the top surface of the bottom plate to the plurality of connecting ends. The bottom ends of the suspension wires are located in the grooves and connected with the connecting ends, and the top ends of the suspension wires extend upwards. And the upper reed is connected with the top ends of the plurality of suspension wires and is elastically connected with the frame and the carrier.

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] In recent years, the inclusion of small cameras in portable devices, such as mobile phones, has become increasingly common. Lens drive devices, a key component of the imaging mechanisms of these small portable devices, are used for autofocusing in still and moving image capture, requiring a compact and highly precise lens drive.

[0003] However, current lens driving devices usually require a bracket to be installed on a small electronic device. However, the bracket and the lens driving structure need to be assembled before the bracket and the electronic device are assembled together, which is complicated and not conducive to the processing and assembly of the electronic device. Utility Model Content

[0004] The purpose of the utility model is to provide a lens driving mechanism to solve the problems of the prior art.

[0005] In order to solve the above technical problems, the embodiments of the present invention provide a lens driving mechanism, comprising:

[0006] A base, comprising:

[0007] A bottom plate, the top surface of which is provided with a plurality of grooves,

[0008] a bracket, the bracket being located on the top surface of the bottom plate and being integrally formed with the bottom plate; and

[0009] a built-in metal frame, the built-in metal frame comprising a plurality of conductive threads, each of the plurality of conductive threads comprising a middle section and connecting sections at both ends of the middle section, the middle sections of the plurality of conductive threads being in the same horizontal plane and located within the base plate and / or the bracket, and the connecting sections of at least some of the conductive threads being bent downward by a preset distance to form another connecting end located below the horizontal plane;

[0010] The plurality of grooves are formed by the top surface of the bottom plate being recessed to the plurality of connecting ends respectively;

[0011] a plurality of suspension wires, wherein the bottom ends of the plurality of suspension wires are located in the plurality of grooves and connected to the plurality of connection ends, and the top ends extend upward;

[0012] a frame suspended from the top surface of the base plate and configured to be movable in a horizontal direction;

[0013] a carrier connected to the frame and configured to be movable in a vertical direction;

[0014] An upper spring is connected to the top ends of the plurality of suspension wires and is elastically connected to the frame and the carrier.

[0015] In one embodiment, the plurality of conductive threads form a rectangular structure; and among the four conductive threads, one of the connection ends of each conductive thread is located below the horizontal plane and at four corners of the rectangular structure;

[0016] The bottom plate is in a rectangular plate shape, and the four grooves are respectively formed at the four corners of the bottom plate;

[0017] The bottom ends of the four suspension wires are respectively connected to the connecting ends in the four grooves.

[0018] In one embodiment, the four corners of the bottom plate are provided with concave damping rubber grooves, and each of the damping rubber grooves is arranged around the corresponding groove;

[0019] The depth of the groove is greater than the depth of the damping rubber groove.

[0020] In one embodiment, the radial outer side of the bracket is flush with the radial outer side of the base plate;

[0021] A welding groove is provided on the radial outer side of the bottom plate, and the welding groove extends to the bottom surface of the bracket;

[0022] A plurality of the conductive wires form a rectangular structure, and the connecting sections of another portion of the conductive wires are located in the welding grooves.

[0023] In one embodiment, the connecting segments of another portion of the conductive threads are perpendicular to the horizontal plane.

[0024] In one embodiment, the connecting segments of another portion of the conductive threads are in the same plane as the horizontal plane.

[0025] In one embodiment, a protruding projection is further provided on the radial outer side of the bottom plate, and the protrusion is formed by extending the edge of the welding groove toward the radial outer sides of the bottom plate and the bracket.

[0026] In one embodiment, the bottom wall of the bottom plate is further provided with a clearance groove, which is communicated with the groove and is open toward the radial outside of the bottom plate.

[0027] In one embodiment, the radial outer sides of the base plate and the bracket are further provided with a snap-fit ​​groove;

[0028] The lens driving mechanism further includes a housing connected to the base and including a clamping portion clamped with the clamping slot.

[0029] In one embodiment, a mounting groove is provided on the top surface of the base plate, and a sensor for sensing the position of the frame is installed in the mounting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 and Figure 2 It is a three-dimensional diagram of a lens driving mechanism according to an embodiment of the present invention.

[0031] Figure 3 and Figure 4 yes Figure 1 An assembly diagram of the base and suspension wire of one embodiment is shown.

[0032] Figure 5 yes Figure 1 Assembly diagram of the base, frame, carrier, upper spring, lower spring and suspension wire in the illustrated embodiment.

[0033] Figure 6 This is an assembly diagram of a base and a suspension wire according to another embodiment of the present invention.

[0034] Figure 7 yes Figure 6 Assembly diagram of the base, frame, carrier, upper spring, lower spring and suspension wire in the illustrated embodiment.

[0035] Figure 8 This is an assembly diagram of a built-in metal frame and suspension wires according to an embodiment of the present invention.

[0036] Figure 9 yes Figure 1 Assembly diagram of the lens drive mechanism in the illustrated embodiment.

[0037] Figure 10 yes Figure 1 A perspective view of the base, suspension wires and housing in the illustrated embodiment.

[0038] Reference numerals: 10, lens drive mechanism; 1, base; 11, bottom plate; 12, bracket; 13, built-in metal frame; 131, first conductive wire; 132, second conductive wire; 133, connecting section; 134, middle section; 135, connecting end; 14, groove; 15, damping rubber groove; 16, clearance groove; 171, first welding groove; 172, second welding groove; 173, protrusion; 18, mounting groove; 19, snap-fit ​​groove; 191, inclined surface; 2, frame; 21, magnet group; 22, protrusion; 3, carrier; 4, suspension wire; 5, upper spring; 6, lower spring; 7, housing; 71, side panel; 72, top panel; 73, avoidance groove; 74, inclined plate; 8, sensor; 9, circuit board; DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more clearly 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 achieved.

[0040] 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."

[0041] The following will be combined with the accompanying drawings to describe in detail the various embodiments of the present invention so that the purpose, features and advantages of the present invention can be more clearly understood. 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.

[0042] 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.

[0043] 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.

[0044] In the following description, in order to clearly demonstrate 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.

[0045] The present invention relates to a lens drive mechanism 10, which includes a base 1, four suspension wires 4, a frame 2, a carrier 3, an upper spring 5, a lower spring 6, a circuit board 9, and a housing 7. The base 1 is used to support the frame 2 and the carrier 3, the suspension wires 4 are used to support the frame 2, the frame 2 is used for anti-shake, the carrier 3 is used to mount the lens, and the upper spring 5 and the lower spring 6 are used to drive the carrier 3 to reset. The housing 7 is connected to the base 1 and covers the exterior of the frame 2, the carrier 3, the upper spring 5, and the lower spring 6. The lens drive mechanism 10 of one embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0046] like Figure 1-3 As shown, the base 1 includes a bottom plate 11, a bracket 12 and a built-in metal frame 13, wherein the base 1 includes the bottom plate 11 and the bracket 12 located on the bottom surface of the bottom plate 11, the bracket 12 and the bottom plate 11 are integrally formed, and the bracket 12 is used to install electronic equipment.

[0047] The bottom plate 11 is in the shape of a rectangular plate, and the bracket 12 is generally in the shape of a ring. The bracket 12 is provided with a mounting position and can be directly mounted on an electronic device.

[0048] In the prior art, the base plate 11 needs to be mounted on the bracket 12, which has a mounting position for mounting on the electronic device. In the present invention, the bracket 12 and the base plate 11 are integrally formed, which increases the overall thickness of the base 1. This eliminates the need to assemble the base plate 11 and the bracket 12, thus simplifying the assembly process of the lens drive mechanism 10 and the electronic device.

[0049] In some embodiments, the radial outer side of the bracket 12 is basically flush with the radial outer side of the base plate 11. The utility model does not limit the specific shape of the bracket 12. After the bracket 12 and the base plate 11 are integrally formed, the specific shape of the bracket 12 cannot be seen at the bottom of the base, that is, the base is formed after the base plate and the bracket are integrally formed. The bottom surface of the base needs to be set with a bracket installation position or other connection position to facilitate the connection of electronic equipment.

[0050] The top surface of the base 1 is provided with four grooves 14, which are respectively located at the four corners of the base 1 and are formed by the top surface of the base 1 being recessed to a preset depth. In some embodiments, the grooves 14 can also be directly recessed to the bottom end of the base 1 to form a through hole.

[0051] The built-in metal frame 13 includes multiple conductive wires, some of which are insulated and some of which are electrically connected. The multiple conductive wires respectively include a middle section 134 and connecting sections 133 located at both ends of the middle section 134. The middle section 134 and the connecting section 133 are integrally formed. The connecting section 133 is mainly used for electrical connection to external electronic components or other components. The middle sections 134 of the multiple conductive wires are basically located on the same horizontal plane and are located inside the base 1. The outer ends of the connecting section 133 or the entire connecting section 133 need to be exposed outside the base 1 to facilitate electrical connection with other electronic components or other components.

[0052] Since the base 1 is formed of an integral bottom plate 11 and a bracket 12 , the built-in metal frame 13 may be located inside the bottom plate 11 , partially inside the bracket 12 , or between the bottom plate 11 and the bracket 12 , and the specific location of the built-in metal frame 13 is not limited.

[0053] The four conductive wires are close to the four corners of the base 1, and the outer end of a connecting segment 133 of each of the four conductive wires deviates from the horizontal plane where the middle segment 134 is located and bends downward to form a connecting end 135. The horizontal plane where the connecting end 135 is located is lower than the horizontal plane where the middle segment 134 is located, and each connecting end 135 of the four conductive wires is respectively located in four grooves 14 and forms the bottom wall of the groove 14.

[0054] In addition, the four corners of the base plate 11 are respectively provided with recessed damping rubber grooves 15. Each damping rubber groove 15 is arranged around the corresponding groove 14 and the depth of each damping rubber groove 15 is less than the depth of the groove 14. The damping rubber groove 15 is formed by the recess of the top surface of the base plate 11 and is open toward the radial outside of the base plate 11 to facilitate glue dispensing.

[0055] In some embodiments, the damping glue groove 15 is a semi-closed annular groove and is arranged around part of the groove 14, and the top surface of the base plate 11 is also provided with a clearance groove 16. The clearance groove 16 and the damping glue groove 15 are spaced apart and are also open toward the radial outside of the base plate 11. The depth of the clearance groove 16 is greater than the depth of the damping glue groove 15 and is connected to the groove 14. The clearance groove 16 facilitates the operation of heating the damping glue, so that the damping glue is exposed to a larger area to increase the thermal fixing speed and efficiency.

[0056] A plurality of welding grooves are provided on the radial outer side of the base 1 , which extend substantially from the radial outer side of the bottom plate 11 to the bottom surface of the bracket 12 . That is, the welding grooves are open toward the radial outer side and the bottom surface of the base 1 .

[0057] Among the multiple conductive filaments, the connecting segments 133 of some of the conductive filaments are located within a portion of the welding slots. These conductive filaments are defined as first conductive filaments 131, and the welding slots of these conductive filaments are located at first welding slots 171. The connecting segments 133 of the first conductive filaments 131 are located at the same horizontal plane as the intermediate segments 134. In other words, the connecting segments 133 of the first conductive filaments 131 extend at the horizontal plane of the intermediate segments 134 and into the first welding slots 171, or the outer ends of the connecting segments 133 are located within the first welding slots 171.

[0058] In addition, as a preferred solution, the first welding groove 171 includes a top and a bottom, the top depth of the first welding groove 171 is less than the bottom depth, and the outer end of the connecting section 133 of the first conductive wire 131 is located at the top of the first welding groove 171, and the inner end is embedded in the base 1 and is not completely exposed in the first welding groove 171.

[0059] The connection section 133 of the first conductive wire 131 is at a relatively high distance from the bottom end of the base 1 , and the bottom end depth of the first welding groove 171 is relatively large, which can increase the amount of solder and facilitate adaptation to the access end of some electronic devices.

[0060] In another embodiment, the connecting segments 133 of another portion of the conductive filaments are located within another portion of the welding grooves. The connecting segments 133 of this portion of the conductive filaments extend vertically downward from the outer ends of the middle segments 134. This portion of the conductive filaments is defined as the second conductive filaments 132, and the welding grooves are located at the second welding grooves 172. The plane where the connecting segments 133 of the second conductive filaments 132 lie is substantially perpendicular to the plane of the middle segments 134, and the bottom ends of the second conductive filaments 132 are close to the bottom surface of the base 1. The bottom and top depths of the second welding grooves 172 are substantially the same.

[0061] The connecting section 133 of the second conductive wire 132 is closer to the bottom surface of the base 1, and can adapt to the different specifications of the input terminals of some electronic devices. In other words, the second conductive wire 132 and the first conductive wire 131 are adapted to the different specifications of the input terminals of electronic devices. Of course, in some embodiments, the connecting section 133 of the first conductive wire 131 and the second conductive wire 132 can also be set to the same specifications, and the shape and configuration of the connecting section 133 can be set according to needs.

[0062] A protrusion 173 is also provided on the radially outer side of the base plate 11. This protrusion 173 extends radially outward from the edge of the soldering groove toward the radially outer side of the base plate 11 and bracket 12. In other words, this protrusion 173 is annular and extends radially outward from the base 1, surrounding the edge of the soldering groove. This protrusion 173 effectively deepens the soldering groove, increasing the amount of solder.

[0063] A snap-fitting groove 19 is further provided on the radial outer side of the base 1 . The inner side wall of the snap-fitting groove 19 is an inclined surface 191 . The inclined surface 191 gradually approaches inward from top to bottom.

[0064] The housing 7 includes a top plate 72 and four side plates 71. The four side plates 71 are annular and extend radially outward from the frame 2 and carrier 3. The top plate 72 is connected to the top ends of the four side plates 71. The bottom ends of some or all of the four side plates 71 are also provided with multiple escape grooves 73. Each escape groove 73 can be used to avoid the protrusion 173. The position and size of the escape grooves 73 can be set according to the shape of the protrusion 173.

[0065] The bottom ends of the four side panels 71 or part of the side panels 71 are also provided with a snap-fitting portion, which is an inclined piece 74 inclined inward from the top end to the bottom end. The inclined piece 74 can be engaged with the inclined surface 191 of the snap-fitting groove 19 to increase the stability of the connection between the shell 7 and the base 1.

[0066] A circuit board 9 is also mounted on the top surface of the base 1 , and the circuit board 9 is also electrically connected to some conductive wires of the built-in metal frame 13 . An OIS coil assembly may be provided in the circuit board 9 or in the base 1 .

[0067] The frame 2 is annular and suspended from the top surface of the base plate 11. It is located within the ring surrounded by four suspension wires 4 and is equipped with a magnet assembly 21. This magnet assembly 21, in conjunction with the OIS coil assembly, drives the frame 2 in two directions perpendicular to the vertical direction, providing anti-shake protection. Furthermore, the top surface of the base 1 features two mounting slots 18, each housing a sensor 8 for sensing the position of the frame 2.

[0068] Optionally, the four corners of the frame 2 are further provided with protrusions 22, which protrude from the bottom end of the frame 2 and are located in the damping rubber groove 15 of the base 1. When the frame 2 moves in the vertical direction, the four protrusions 22 respectively contact the damping rubber, and the damping rubber can buffer the movement of the frame 2.

[0069] The carrier 3 is located in the ring of the frame 2 and is provided with an AF coil. The AF coil cooperates with the magnet group 21 to drive the carrier 3 to move in the vertical direction to adjust the focal length.

[0070] The upper spring 5 is located on top of the frame 2 and carrier 3 and is elastically connected to them. Once carrier 3 is reset, it drives the carrier 3 back into position. Furthermore, the upper spring 5 is connected to the tops of four suspension wires 4, supporting the frame 2 suspended above the base 1. The upper spring 5 is electrically connected to the suspension wires 4 and the AF coil. When the internal metal frame 13 is energized, current flows through the suspension wires 4 and the upper spring 5 into the AF coil of the carrier 3.

[0071] The lower spring leaf 6 is located on the bottom surface of the frame 2 and the carrier 3 and is connected to the frame 2 and the carrier 3 . The lower spring leaf 6 and the upper spring leaf 5 cooperate to drive the carrier 3 to reset.

[0072] 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.

[0073] 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.

[0074] 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: A base, comprising: A bottom plate, the top surface of which is provided with a plurality of grooves, a bracket, the bracket being located on the top surface of the bottom plate and being integrally formed with the bottom plate; and a built-in metal frame, the built-in metal frame comprising a plurality of conductive threads, each of the plurality of conductive threads comprising a middle section and connecting sections at both ends of the middle section, the middle sections of the plurality of conductive threads being in the same horizontal plane and located within the base plate and / or the bracket, and the connecting sections of at least some of the conductive threads being bent downward by a preset distance to form another connecting end located below the horizontal plane; The plurality of grooves are formed by the top surface of the bottom plate being recessed to the plurality of connecting ends respectively; a plurality of suspension wires, wherein the bottom ends of the plurality of suspension wires are located in the plurality of grooves and connected to the plurality of connection ends, and the top ends extend upward; a frame suspended from the top surface of the base plate and configured to be movable in a horizontal direction; a carrier connected to the frame and configured to be movable in a vertical direction; An upper spring is connected to the top ends of the plurality of suspension wires and is elastically connected to the frame and the carrier.

2. The lens driving mechanism according to claim 1, wherein: The plurality of conductive threads form a rectangular structure; and among the four conductive threads, one of the connection ends of each conductive thread is located below the horizontal plane and at four corners of the rectangular structure; The bottom plate is in a rectangular plate shape, and the four grooves are respectively formed at the four corners of the bottom plate; The bottom ends of the four suspension wires are respectively connected to the connecting ends in the four grooves.

3. The lens driving mechanism according to claim 2, wherein: The four corners of the bottom plate are provided with concave damping rubber grooves, and each of the damping rubber grooves is arranged around the corresponding groove; The depth of the groove is greater than the depth of the damping rubber groove.

4. The lens driving mechanism according to claim 2, wherein: The radial outer side of the bracket is flush with the radial outer side of the base plate; A welding groove is provided on the radial outer side of the bottom plate, and the welding groove extends to the bottom surface of the bracket; A plurality of the conductive wires form a rectangular structure, and the connecting sections of another portion of the conductive wires are located in the welding grooves.

5. The lens driving mechanism according to claim 4, wherein: The connecting segments of another portion of the conductive threads are perpendicular to the horizontal plane.

6. The lens driving mechanism according to claim 4, wherein: The connecting segments of another part of the conductive threads are in the same plane as the horizontal plane.

7. The lens driving mechanism according to claim 4, wherein: A protrusion is further provided on the radial outer side of the bottom plate. The protrusion is formed by extending the edge of the welding groove toward the radial outer sides of the bottom plate and the bracket.

8. The lens driving mechanism according to claim 3, wherein: The bottom wall of the bottom plate is further provided with a clearance groove, which is communicated with the groove and is open toward the radial outer side of the bottom plate.

9. The lens driving mechanism according to claim 4, wherein: The radial outer sides of the base plate and the bracket are further provided with snap-fit ​​grooves; The lens driving mechanism further includes a housing connected to the base and including a clamping portion clamped with the clamping slot.

10. The lens driving mechanism according to claim 1, wherein: A mounting groove is provided on the top surface of the bottom plate, and a sensor for sensing the position of the frame is installed in the mounting groove.

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