Lens drive mechanism

Abstract

The present invention discloses a lens drive mechanism, comprising a base, a lower spring, a magnet group, a carrier, an upper spring, a housing, a crystal lens carrier, and a bracket. The lower spring movably connects the base to the bottom of the carrier, the upper spring connects the upper surface of the carrier to the inner wall of the housing, the carrier is provided with a coil, the magnet group is mounted on the inner wall of the housing and cooperates with the coil, the crystal lens carrier cooperates with the carrier and is fixedly mounted on the housing, and the bracket is mounted on the top of the carrier. The present invention achieves focusing through deformation of the crystal lens, is ingenious in design, and has high stability.

Description

Technical Field

[0001] The present invention relates to the field of imaging, and in particular to a lens driving mechanism. Background Art

[0002] With the advancement of technology, many electronic devices (such as smartphones and digital cameras) now have photo or video recording capabilities. These devices are becoming increasingly common and are developing in a trend toward more convenient, lightweight, and slim designs, offering users a wider range of options. However, zooming is currently typically achieved by using a carrier-driven lens. Summary of the Invention

[0003] The purpose of the present invention is to provide a lens driving mechanism to provide a new zooming method.

[0004] In order to solve the above problems, according to one aspect of the present invention, a lens driving mechanism is provided, which includes a base, a lower spring, a magnet group, a carrier, an upper spring, a shell, a crystal lens carrier and a bracket. The lower spring movably connects the base with the bottom of the carrier, and the upper spring connects the upper surface of the carrier with the inner wall of the shell. The carrier is provided with a coil, the magnet group is installed on the inner wall of the shell and cooperates with the coil, the crystal lens carrier cooperates with the carrier and is fixedly installed on the shell, and the bracket is installed on the top of the carrier.

[0005] In one embodiment, the carrier includes a carrier base and a plurality of protruding blocks integrally extending upward from an upper surface of the carrier base, a bracket mounting portion is provided on the top of the protruding blocks, and the bracket is mounted on the bracket mounting portion.

[0006] In one embodiment, an opening is provided on the upper surface of the shell, and a shell protrusion is formed around the opening. The shell protrusion extends upward from the upper surface of the shell for a certain distance, and the crystal lens carrier is fixedly mounted on the shell protrusion.

[0007] In one embodiment, the bracket mounting portion includes a groove and bracket fixing columns located on both sides of the groove. The bracket is provided with a fixing hole that cooperates with the bracket fixing column. The bracket is fixed to the bracket mounting portion by cooperating with the bracket fixing hole and the bracket fixing column.

[0008] In one embodiment, a lens assembly mounting hole is provided inside the lens carrier, and a plurality of lens carrier grooves are provided on the inner wall of the lens assembly mounting hole, and the lens carrier grooves cooperate with the protruding blocks of the carrier.

[0009] In one embodiment, a plurality of lens carrier protrusions are provided inside the lens carrier, and the grooves are provided on the sides of the lens carrier protrusions.

[0010] In one embodiment, an outer wall of the lens carrier is provided with an annular flange, which cooperates with and rests on the housing protrusion.

[0011] In one embodiment, the bracket includes an annular body, an opening is formed in the middle of the annular body, and multiple pairs of bracket protrusions extend outward from the outer circumference of the annular body. A bracket groove is formed between each pair of bracket protrusions, and the bracket groove cooperates with the carrier groove on the carrier.

[0012] In one embodiment, a central opening of the base is formed in the middle of the base to cooperate with the lens assembly, and an annular protrusion of the base is formed around the central opening of the base to protrude toward the top wall of the shell.

[0013] In one embodiment, a sensor magnet is further provided at the bottom of the carrier, and a sensor is provided on the base, and the displacement of the carrier relative to the base is detected by the cooperation between the sensor and the sensor magnet.

[0014] In one embodiment, the base further includes a base embedded metal sheet, which is provided with an external connection portion and a first coil connection portion and a second coil connection portion, so as to respectively cooperate with corresponding portions of the lower spring sheet, thereby electrically connecting the coil to the external circuit through the base embedded metal sheet and the lower spring sheet.

[0015] In one embodiment, a sinking portion is provided on the upper surface of the shell, and the upper spring includes an outer ring and an inner ring, the outer ring is fixedly connected to the inner surface of the sinking portion, and the inner ring is fixedly connected to the upper surface of the carrier base.

[0016] According to another aspect of the present invention, a lens assembly is also provided, which includes a base, a lower spring, a magnet group, a carrier, an upper spring, a shell, a crystal lens carrier, a bracket and a crystal lens. The lower spring movably connects the base to the bottom of the carrier, and the upper spring connects the top of the carrier to the inner wall of the shell. The carrier is provided with a coil, the magnet group is mounted on the inner wall of the shell and cooperates with the coil, the crystal lens carrier is fixedly mounted on the shell and cooperates with the carrier, the crystal lens is mounted on the crystal lens carrier, the bracket is mounted on the top of the carrier and cooperates with the crystal lens, and when the coil is energized, it drives the carrier to drive the bracket to move toward the crystal lens and squeeze the crystal lens to deform, thereby realizing a focusing function.

[0017] In one embodiment, the lens assembly further includes a lens group, a front end of the lens group is provided with a plurality of lens group protrusions, a lens group mounting hole is provided inside the crystal lens carrier, and an inner wall of the lens group mounting hole is provided with a plurality of crystal lens carrier grooves, and the crystal lens carrier grooves cooperate with the lens group protrusions.

[0018] In one embodiment, the lens assembly includes a lens barrel and a lens, the lens is arranged inside the lens barrel, and a front end of the lens barrel is provided with a plurality of protrusions, and the plurality of protrusions cooperate with the grooves inside the crystal lens carrier.

[0019] In one embodiment, the carrier includes a carrier base and a plurality of protruding blocks integrally extending upward from an upper surface of the carrier base, a bracket mounting portion is provided on the top of the protruding blocks, and the bracket is mounted on the bracket mounting portion.

[0020] In one embodiment, an opening is provided on the upper surface of the shell, and a shell protrusion is formed around the opening. The shell protrusion extends upward from the upper surface of the shell for a certain distance, and the crystal lens carrier is fixedly mounted on the shell protrusion.

[0021] In one embodiment, the bracket mounting portion includes a groove and bracket fixing columns located on both sides of the groove. The bracket is provided with a fixing hole that cooperates with the bracket fixing column. The bracket is fixed to the bracket mounting portion by cooperating with the bracket fixing hole and the bracket fixing column.

[0022] In one embodiment, a plurality of lens carrier protrusions are provided inside the lens carrier, and the lens carrier grooves are provided on surfaces of the lens carrier protrusions.

[0023] In one embodiment, an outer wall of the lens carrier is provided with an annular flange, which cooperates with and rests on the housing protrusion.

[0024] In one embodiment, the bracket includes an annular body, an opening is formed in the middle of the annular body, and multiple pairs of bracket protrusions extend outward from the outer circumference of the annular body. A bracket groove is formed between each pair of bracket protrusions, and the bracket groove cooperates with the carrier groove on the carrier.

[0025] In one embodiment, a central opening of the base is formed in the middle of the base to cooperate with the lens assembly, and an annular protrusion of the base is formed around the central opening of the base to protrude toward the top wall of the shell.

[0026] In one embodiment, a sensor magnet is further provided at the bottom of the carrier, and a sensor is provided on the base, and the displacement of the carrier relative to the base is detected by the cooperation between the sensor and the sensor magnet.

[0027] In one embodiment, the base further includes a base embedded metal sheet, which is provided with an external connection portion and a first coil connection portion and a second coil connection portion, so as to respectively cooperate with corresponding portions of the lower spring sheet, thereby electrically connecting the coil to the external circuit through the base embedded metal sheet and the lower spring sheet.

[0028] In one embodiment, a sinking portion is provided on the upper surface of the shell, and the upper spring includes an outer ring and an inner ring, the outer ring is fixedly connected to the inner surface of the sinking portion, and the inner ring is fixedly connected to the upper surface of the carrier base.

[0029] According to another aspect of the present invention, a carrier for a lens assembly is also provided, wherein the lens assembly includes a bracket and a crystal lens, the carrier includes a carrier base and a plurality of carrier protrusions extending upward from the upper surface of the carrier base, a carrier center hole is provided in the middle of the carrier base, the plurality of carrier protrusions are arranged around the center hole and a bracket mounting portion is provided on the top, and the bracket is mounted on the bracket mounting portion.

[0030] In one embodiment, a limiting portion is further provided on the upper surface of the carrier base, and the limiting portion is arranged on the outside of the carrier protruding block. The limiting portion is formed by extending upward by a certain distance, and the height of the limiting portion is lower than the height of the carrier protruding block.

[0031] In one embodiment, the lens assembly further includes an upper spring plate, which includes a carrier connecting portion, and an L-shaped groove is provided between the limiting portion and the protruding block, and the L-shaped groove cooperates with the carrier connecting portion of the upper spring plate to fix the inner ring of the upper spring plate to the carrier base.

[0032] In one embodiment, the lens assembly further comprises a base, the base is provided with a sensor, and the bottom of the carrier base is further provided with a sensor magnet, the sensor magnet cooperates with the sensor.

[0033] In one embodiment, a sensor magnet mounting hole is formed at the bottom of the carrier base, and the sensor magnet is mounted in the sensor magnet mounting hole.

[0034] In one embodiment, the lens assembly further includes a shell, an inner wall of the shell is provided with a magnet group, and the carrier base is further provided with a coil that cooperates with the magnet group, and the coil is arranged around the carrier base.

[0035] In one embodiment, the bracket mounting portion includes a carrier groove and carrier fixing columns located on both sides of the carrier groove, and the bracket includes a bracket groove and a bracket fixing hole, the bracket groove cooperates with the carrier groove, and the bracket fixing hole cooperates with the carrier fixing column.

[0036] In one embodiment, an opening is provided in the bracket groove, and the opening extends along the optical axis.

[0037] In one embodiment, a bracket protrusion is provided on the outer side of the bracket groove to limit the crystal lens.

[0038] In one embodiment, a notch is further provided at an outer corner of the bracket mounting portion.

[0039] According to another aspect of the present invention, a crystal lens carrier of a lens drive assembly is also provided, wherein the lens drive assembly includes a crystal lens and a lens group, the crystal lens carrier has a crystal lens carrier mounting hole that cooperates with the lens group, a plurality of crystal lens carrier protrusions are provided on the inner wall of the crystal lens carrier mounting hole, a crystal lens carrier groove is provided in the plurality of crystal lens carrier protrusions, and the crystal lens carrier groove cooperates with the lens group protrusions on the lens group.

[0040] In one embodiment, the lens drive assembly further includes a shell, the upper surface of the shell is provided with a shell protrusion, the upper part of the crystal lens carrier is provided with an annular flange protruding along an outer wall perpendicular to the crystal lens carrier, the annular flange extends around the outer wall of the crystal lens and forms a step with the outer wall of the crystal lens carrier, and the step rests on the shell protrusion.

[0041] In one embodiment, the lens driving assembly further comprises a carrier, the carrier being provided with a carrier protrusion, and a space cooperating with the carrier protrusion is formed between every two crystal lens carrier grooves.

[0042] In one embodiment, the flange is further provided with a flange groove.

[0043] In one embodiment, the flange groove extends from an upper surface of the flange to a lower surface of the flange and has the same height as the flange.

[0044] In one embodiment, the upper surface of the flange is further provided with a plurality of flange protrusions to limit the position of the crystal lens.

[0045] In one embodiment, the flange protrusion is spaced apart from the flange groove.

[0046] In one embodiment, a second groove for the crystal lens is further provided on the outer wall of the crystal lens carrier below the flange.

[0047] In one embodiment, a lens notch is further provided on the outer wall of the lens carrier below the flange.

[0048] In one embodiment, the lens notch and the lens second groove are spaced apart.

[0049] The present invention realizes the focusing function by deforming the crystal lens, has an ingenious design and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a perspective view of a lens assembly according to an embodiment of the present invention.

[0051] Figure 2 It is a three-dimensional diagram of a base according to one embodiment of the present invention.

[0052] Figure 3 It is a three-dimensional diagram of a metal sheet embedded in a base according to an embodiment of the present invention.

[0053] Figure 4 It is a three-dimensional view of the lower spring according to one embodiment of the present invention.

[0054] Figure 5 It is a three-dimensional view of an upper spring according to an embodiment of the present invention.

[0055] Figure 6 It is a three-dimensional diagram of a carrier according to an embodiment of the present invention.

[0056] Figure 7 1 is a perspective view of a bracket according to an embodiment of the present invention.

[0057] Figure 8 1 is a perspective view of a lens carrier according to an embodiment of the present invention.

[0058] Figure 9 1 is a perspective view of a housing according to an embodiment of the present invention.

[0059] Figure 10 1 is a perspective view of a lens assembly according to an embodiment of the present invention.

[0060] Figure 11 and Figure 12 They are respectively different cross-sectional views of the lens assembly of the present invention. DETAILED DESCRIPTION

[0061] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, 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 solutions of the present invention.

[0062] In the following description, for the purpose of illustrating the various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0063] 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.

[0064] 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.

[0065] Figure 1 FIG is a perspective view of a lens assembly according to an embodiment of the present invention. Figure 1 As shown, the lens assembly as a whole includes a crystal lens 10, a bracket 20, a crystal lens carrier 30, a housing 40, an upper spring 51, a lens group 60, a carrier 70, a magnet group 52, a lower spring 53, a base 80, and a base-embedded metal sheet 90. The base-embedded metal sheet 90 is embedded in the base 80. The lower spring 53 is mounted on the base 80 and movably connects the base 80 with the surface of the carrier 70 facing the base 80 (referred to as the lower surface). The magnet group 52 is fixedly mounted on the inner wall of the housing 40 and cooperates with the coil on the carrier 70. The upper spring 51 movably connects the surface of the carrier 70 facing away from the base 80 (referred to as the upper surface) to the housing 40. The crystal lens carrier 30 is mounted on the housing 40 and cooperates with the carrier 70. The bracket 20 is mounted on the crystal lens carrier 30 and is used to support the crystal lens 10. The lens group 60 is fixedly mounted on the base 80. When the carrier 70 moves along the optical axis toward the crystal lens 10, the bracket 20 moves toward the crystal lens 10 along with the carrier 70 and squeezes the crystal lens 10, thereby squeezing out a protrusion in the middle of the crystal lens 10 that protrudes toward the base, causing the crystal lens 10 to deform to achieve the focusing function.

[0066] Figure 2 80 is a perspective view of the base. Figure 2As shown, a central opening 81 is formed in the middle of the base 80 to cooperate with the lens assembly 60. An annular protrusion 82 is formed around the central opening 81, protruding toward the crystal lens 10. The annular protrusion 82 extends a certain distance S1 toward the crystal lens 10 along the optical axis. The lens assembly 60 is fixedly mounted within the central opening 81 defined by the annular protrusion 82 of the base 80. The outer wall of the annular protrusion 82 cooperates with the inner wall of the carrier center hole 711 on the base 71 of the carrier 70. In other words, the carrier center hole 711 on the base 71 of the carrier 70 is arranged around the annular protrusion 82 of the base 80 (see Figure 10 and Figure 11 Each of the four corners of the base 80 is further provided with a support column 83 that protrudes toward the crystal lens 10. The support column 83 extends a certain distance S2 along the optical axis toward the crystal lens 10, and the housing 40 is disposed outside the support column 83. In one embodiment, the distance S1 along the optical axis that the annular protrusion 82 extends is less than the distance S2 along the optical axis that the support column 83 extends.

[0067] Continue to refer to Figure 2 Lower spring fixing posts 84 are provided on both sides of the support post 83, and the base fixing hole 532 of the lower spring 53 is fixed to the lower spring fixing posts 84. A first base-embedded metal sheet interface 85 and a second base-embedded metal sheet interface 86 are also provided on one side of the base 80. The first lower spring connecting portion 93 and the second lower spring connecting portion 94 of the base-embedded metal sheet 90 extend into the first base-embedded metal sheet interface 85 and the second base-embedded metal sheet interface 86, respectively.

[0068] Figure 3 : is a three-dimensional diagram of the metal sheet 90 embedded in the base. Figure 3 As shown, the base embedded metal sheet 90 includes an annular body 91, a plurality of external connecting portions 92, and a first lower spring connecting portion 93 and a second lower spring connecting portion 94. The first lower spring connecting portion 93 and the second lower spring connecting portion 94 are respectively connected to the first base embedded metal sheet connecting portion and the second base embedded metal sheet connecting portion on the lower spring 53.

[0069] Figure 4 : is a three-dimensional diagram of the lower spring 53. Figure 4As shown, the lower spring 53 consists of a first portion 531 and a second portion 532, which together form a roughly rectangular structure. The structure includes a carrier-fixing portion 533 located within the inner circle, base-fixing portions 534 located at the four corners, and coil-connecting portions 535. The carrier-fixing portion 533 and base-fixing portion 534 are connected by elastic strips 536, allowing relative movement between the carrier-fixing portion 533 and the base-fixing portion 534. In this embodiment, two coil-connecting portions 535 are provided, one connecting to each end of the coil. This electrically connects the coil to the base's embedded metal sheet via the lower spring 53, allowing external current to be supplied to the coil via the base's embedded metal sheet. Specifically, the center of the base-fixing portion 534 forms a U-shaped opening that mates with the support column 83 of the base 80. The U-shaped opening is flanked by lower spring fixing holes for secure connection with the lower spring fixing columns 84 on the base 80. The carrier fixing portion 533 includes a circular hole 5331 and an arcuate groove 5332. The carrier fixing portion 533 is fixedly connected to the bottom of the carrier 70 through the circular hole 5331 and the arcuate groove 5332. The lower spring 50 is also provided with a base embedded metal sheet connecting portion. The base embedded metal sheet connecting portion can be provided on two of the lower spring fixing portions 534, for example, at Figure 4 In the embodiment shown, a first base embedded metal sheet connection portion and a second base embedded metal sheet connection portion can be respectively provided on the two lower spring fixing portions 534 on the right side of the figure, so that the base embedded metal sheet is electrically connected to the coil through the lower spring 53, and the external circuit is further electrically connected to the coil.

[0070] Figure 5 : is a three-dimensional diagram of the upper spring 51. Figure 5 The upper spring 51 includes an outer ring 511 and an inner ring 512. The outer ring 511 is fixed to the top wall of the housing 40, and the inner ring 512 is fixed to the upper surface of the carrier 60. Thus, the housing 40 and the carrier 70 are movably connected via the upper spring 51. Specifically, the four corners of the outer ring 511 are provided with upper spring housing connection portions 513, and the inner ring 512 is provided with a carrier connection portion 514. The housing connection portions 513 are fixed to the top wall of the housing, and the carrier connection portions are fixed to the upper surface of the carrier 70.

[0071] Figure 6 is a perspective view of the carrier 70. Figure 6 As shown, the carrier 70 includes a carrier base 71, a carrier center hole 711 is provided in the middle of the carrier base 71, and the carrier center hole 711 cooperates with the annular protrusion 83 on the base 80 and is sleeved on the base annular protrusion 83. The side of the carrier base 71 is wound with a coil 72 (see Figure 10 and Figure 11), the surface of the carrier base 71 facing the housing top wall is provided with a plurality of protruding blocks 73 protruding toward the housing top wall. The protruding blocks 73 extend a certain distance along the optical axis and are provided with a bracket mounting portion 731 at the top. The bracket 20 is mounted on the bracket mounting portion 731. Specifically, the bracket mounting portion 731 includes a groove 732 and fixing posts 734 located on both sides of the groove. The groove 732 is further provided with an opening 733. The outer side of the groove 732 is provided with a protruding portion 736. The outer corner of the bracket mounting portion 731 is also provided with a notch 735. The upper surface of the carrier base 71 is also provided with a stopper 74. The stopper 74 protrudes upward a certain distance, for example, to prevent the housing top wall from colliding with the carrier base. The inner side of the stopper 73 is provided with an L-shaped groove 76. The L-shaped groove 76 is used to cooperate with the carrier connecting portion 514 of the upper spring 51 to fix the inner ring of the upper spring 51 to the upper surface of the base 71 of the carrier 70.

[0072] Reference Figure 10 and Figure 11 The bottom of the carrier 70 is also provided with a sensor magnet 77. Specifically, a sensor magnet mounting hole is formed in the bottom of the carrier 70, and the sensor magnet 77 is installed in the sensor magnet mounting hole. A coil 62 is provided around the carrier base 71 of the carrier 70 to cooperate with the magnet assembly 80 mounted on the inner wall of the housing, thereby driving the carrier 70 along the optical axis through electromagnetic induction.

[0073] Figure 7 20 is a perspective view of the bracket 20. Figure 7 As shown, the bracket 20 includes an annular body 21 with a bracket opening 26 formed in the middle of the annular body 21. Multiple pairs of bracket protrusions 22 extend outward from the periphery of the annular body 21, with bracket grooves 24 formed between each pair of protrusions 22. Each bracket protrusion 22 is provided with bracket fixing holes 23, and one bracket protrusion in each of two pairs of bracket protrusions 22 is provided with a bracket protrusion groove 25. The bracket grooves 24 mate with the carrier grooves 732 on the carrier 70, and the bracket fixing holes 23 mate with the carrier fixing posts 734 on the carrier 70, thereby securing the bracket 20 to the bracket mounting portion 731 of the carrier 70. In this example, a total of four pairs of protrusions 22 are provided, and these four pairs of protrusions 22 are evenly distributed around the periphery of the annular body 21.

[0074] Figure 8 3 is a perspective view of the lens carrier 30. Figure 8As shown, the lens carrier 30 is used to mount the lens 10 and has a lens carrier mounting hole 31 that mates with the carrier 70. The inner wall of the lens carrier mounting hole 31 is provided with a plurality of lens carrier protrusions 311. Each of the lens carrier protrusions 311 defines a lens carrier groove 312. The lens carrier grooves 312 mate with the lens assembly protrusions on the lens assembly 60. In other words, the lens assembly protrusions of the lens assembly 60 extend into the lens carrier grooves 312. The space between each pair of lens carrier grooves 312 is configured to mate with a carrier protrusion 73 on the carrier 70. In other words, the carrier protrusion 73 extends into the space between two lens carrier grooves 312. The lower portion of the lens carrier 30 is received within the central opening 44 of the housing 40, defined by the annular protrusion 43 of the housing. The lens 10 is mounted within the lens mounting hole 31. The upper portion of the lens carrier 30 is provided with an outwardly projecting annular flange 322, which forms a step with the outer wall of the lens carrier 30. The annular flange 322 rests on the housing protrusion 43 on the upper surface of the housing 40. A flange groove 321 is also provided on the flange 322 to facilitate robot grasping. The upper surface of the annular flange 322 is also provided with a flange protrusion 35 to retain the lens in place.

[0075] Figure 9 40 is a perspective view of the housing 40. Figure 9 As shown, housing 40 has an upper surface 41 and sidewalls 42. Upper surface 41 defines a central opening 44, with a housing protrusion 43 surrounding central opening 44. Housing protrusion 43 extends upward from upper surface 41 for a certain distance and is preferably polygonal, such as an octagon. The lower portion of lens carrier 30 extends into housing central opening 44, with flange 322 resting on housing protrusion 43. Corners of upper surface 41 form recessed portions 45, the interior of which forms the top wall of housing 40. The inner surface of recessed portion 45 is fixedly connected to the housing connection portion of upper spring 51.

[0076] Figure 10 is a stereogram of the lens assembly 60. Figure 10 As shown, lens assembly 60 as a whole includes a lens barrel 61 and a lens 62. Lens 62 is disposed within lens barrel 61. Lens barrel 61 includes a base fixing portion 611, a base mating portion 612, a carrier mating portion 614, and a front end portion 615. Front end portion 615 is provided with a plurality of protrusions 616. The plurality of protrusions 616 engage with the lens carrier groove 312 on the inner wall of the lens carrier 30. A lens assembly groove 617 is formed between every two protrusions 616.

[0077] Figure 11 and Figure 12 They are different cross-sectional views of the lens assembly 100 of the present invention. Figure 11 and12 As shown, the housing 40 is mounted on the exterior of the base 80, the carrier 70 is mounted on the upper surface of the base 80, the lens carrier 30 is fixedly mounted on the housing protrusion 43 of the housing 80, the bracket 11 is mounted on the top of the protrusion of the carrier 70, and the lens 10 is mounted on the lens carrier 30. During operation, an external current is connected to the lower spring 53 through the metal sheet 90 embedded in the base, and then to the coil 72 via the lower spring 53. When the coil 72 is energized, the magnetic field generated by the magnet assembly 52 drives the carrier 70 along the optical axis and drives the bracket 20 fixed to the top of the carrier 70. The bracket 20 moves upward and compresses the lens 10, causing the lens 10 to deform. Specifically, the portion of the lens 10 corresponding to the bracket opening 26 of the bracket 20 deforms toward the bracket opening 26, thereby achieving the focusing function. During this process, the base 80, housing 40, lens carrier 30, and lens assembly 60 remain stationary relative to the carrier 70 and bracket 30. The present invention realizes the focusing function by deforming the crystal lens, has an ingenious design and high stability.

[0078] It should be noted that in another embodiment of the present invention, a lens drive mechanism may be provided. This lens drive mechanism may simply include the aforementioned bracket 20, crystal lens carrier 30, housing 40, upper spring 51, carrier 70, magnet assembly 52, lower spring 53, base 80, and base-embedded metal sheet 90. The installation method and details thereof are described above. This lens drive mechanism can be used to mount a lens and drive the crystal lens to deform, thereby achieving a focusing function.

[0079] While the preferred embodiments of the present invention have been described in detail above, it should be understood that, after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. Such equivalents also fall within the scope of the claims appended hereto.

Claims

1. A lens driving mechanism, characterized in that: The lens drive mechanism includes a base, a lower spring, a magnet group, a carrier, an upper spring, a shell, a crystal lens carrier, and a bracket. The lower spring movably connects the base to the bottom of the carrier, the upper spring connects the upper surface of the carrier to the inner wall of the shell, the carrier is provided with a coil, the magnet group is mounted on the inner wall of the shell and cooperates with the coil, the crystal lens carrier cooperates with the carrier and is fixedly mounted on the shell, and the bracket is mounted on the top of the carrier. The carrier includes a carrier base and a plurality of protruding blocks extending upward from the upper surface of the carrier base, the top of the protruding blocks is provided with a bracket mounting portion, and the bracket is mounted on the bracket mounting portion; The lens carrier is provided with a lens assembly mounting hole inside, and the inner wall of the lens assembly mounting hole is provided with a plurality of lens carrier grooves, and the space between each two lens carrier grooves is used to cooperate with the protruding block on the carrier, and the protruding block of the carrier extends into the space between the two lens carrier grooves; A plurality of lens carrier protrusions are provided inside the lens carrier, and the sides of the lens carrier protrusions are provided with the lens carrier grooves; The housing further comprises a lens assembly, wherein a central opening of the base is formed in the middle of the base and matches the lens assembly, an annular protrusion of the base is formed around the central opening of the base and protrudes toward the top wall of the housing, and the lens assembly is fixedly mounted in the central opening defined by the annular protrusion of the base; The lens assembly as a whole includes a lens barrel and a lens. The lens is arranged inside the lens barrel. The lens barrel includes a base fixing portion, a base matching portion, a carrier matching portion and a front end portion. The front end portion is provided with a plurality of protrusions, which are matched with the lens carrier grooves on the inner wall of the lens carrier. The carrier center hole on the carrier base is arranged around the annular protrusion of the base; the annular protrusion of the base extends toward the crystal lens by a distance S1 along the optical axis, and the carrier center hole on the carrier base is arranged around the annular protrusion of the base; each of the four corners of the base is further provided with a support column protruding toward the crystal lens, and the support column extends toward the crystal lens by a distance S2 along the optical axis; The distance S1 that the annular protrusion of the base extends along the optical axis is smaller than the distance S2 that the support column extends along the optical axis.

2. The lens driving mechanism according to claim 1, wherein: An opening is provided on the upper surface of the shell, and a shell protrusion is formed around the opening. The shell protrusion extends upward from the upper surface of the shell for a certain distance, and the crystal lens carrier is fixedly installed on the shell protrusion.

3. The lens driving mechanism according to claim 1, wherein: The bracket mounting portion includes a groove and bracket fixing columns located on both sides of the groove. The bracket is provided with a fixing hole that cooperates with the bracket fixing column. The bracket is fixed to the bracket mounting portion through the fixing hole and the bracket fixing column.

4. The lens driving mechanism according to claim 2, wherein: An outer wall of the crystal lens carrier is provided with an annular flange, which cooperates with the housing protrusion and rests on the housing protrusion.

5. The lens driving mechanism according to claim 1, wherein: The bracket includes an annular body with an opening formed in the middle. Multiple pairs of bracket protrusions extend outward from the outer circumference of the annular body. A bracket groove is formed between each pair of bracket protrusions, and the bracket groove cooperates with the carrier groove on the carrier.

6. The lens driving mechanism according to claim 1, wherein: A sensor magnet is further provided at the bottom of the carrier, and a sensor is provided on the base. The displacement of the carrier relative to the base is detected by the cooperation between the sensor and the sensor magnet.

7. The lens driving mechanism according to claim 1, wherein: The base also includes a base embedded metal sheet, which is provided with an external connection portion and a first coil connection portion and a second coil connection portion, so as to respectively cooperate with corresponding portions of the lower spring sheet, thereby electrically connecting the coil to the external circuit through the base embedded metal sheet and the lower spring sheet.

8. The lens driving mechanism according to claim 1, wherein: The upper surface of the shell is provided with a sinking portion, and the upper spring includes an outer ring and an inner ring. The outer ring is fixedly connected to the inner surface of the sinking portion, and the inner ring is fixedly connected to the upper surface of the carrier base.

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