Optical element drive device

Abstract

The present invention discloses an optical element driving device, comprising a housing, a carrier, an upper spring sheet, a lower spring sheet, a magnet group and a base. The carrier is used to install a lens and is provided with a first coil and a second coil. The magnet group is installed on the inner wall of the housing and is correspondingly matched with the first coil and the second coil on the carrier. The base comprises a bottom plate and a protrusion extending from the bottom plate to the top of the housing. The upper spring sheet movably connects the upper surface of the carrier and the end surface of the protrusion of the base. The lower spring sheet movably connects the lower surface of the carrier and the bottom plate of the base. The base is also provided with a base embedded metal sheet, and the base embedded metal sheet connects the first coil and the second coil to an external circuit. The optical element driving device of the present invention has the beneficial technical effects of simple structure, low cost, high reliability and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical element driving device. Background Art

[0002] With the widespread popularity of smart phones, the application scope of mobile phone cameras is getting wider and wider. However, most of the sensors of mobile phone cameras are currently placed in the module outside the motor. The side FPC uses a flexible circuit board, which causes problems such as warping, and the sensor detection is unstable. At the same time, the side FPC uses a flexible circuit board, and the uneven installation will affect the actual movement stroke. The vertical moving part of the middle carrier transmits the power of the bottom FPC to the upper spring sheet and then to the coil on the carrier through the suspension wire. When the motor is impacted or after a long period of operation, the reliability of the suspension wire becomes low, and it is easy to break and cause problems such as failure of the entire motor. In addition, there is usually a circuit board in the base, which usually includes many layers. The external circuit is connected to the focus coil through the circuit board and suspension wires, etc. The structure is complex, the circuit is not simple enough, and the reliability is affected to a certain extent. Summary of the invention

[0003] The purpose of the present invention is to provide an optical element driving device to solve the above problems in the prior art.

[0004] In order to solve the above problems, according to one aspect of the present invention, an optical element driving device is provided, the optical element driving device comprising a housing, a carrier, an upper spring sheet, a lower spring sheet, a magnet group and a base.

[0005] The carrier is used to mount a lens and is provided with a first coil and a second coil. The magnet group is mounted on the inner wall of the shell and is matched with the first coil and the second coil on the carrier. The base includes a bottom plate and a protrusion extending from the bottom plate to the top of the shell. The upper spring piece movably connects the upper surface of the carrier and the end surface of the protrusion of the base. The lower spring piece movably connects the lower surface of the carrier and the bottom plate of the base.

[0006] The base is also provided with a base embedded metal sheet, and the base embedded metal sheet connects the first coil and the second coil to an external circuit, wherein the first coil cooperates with the magnet group to drive the carrier to move along the optical axis to achieve zooming, and the second coil cooperates with the magnet group to drive the carrier to move on a plane perpendicular to the optical axis to achieve optical image stabilization.

[0007] In one embodiment, the first coil is disposed around the entire circumference of the upper portion of the carrier.

[0008] In one embodiment, the carrier includes a side surface and a corner portion, the second coil is disposed on the side surface of the corner portion, and two second coils located on the diagonal portions are electrically connected.

[0009] In one embodiment, two second coils located at opposite corners are made of the same wire.

[0010] In one embodiment, the base embedded metal sheet is provided with a protruding portion, the protruding portion of the base includes a first protruding portion and a second protruding portion, the protruding portion cooperates with the first protruding portion of the base and is arranged in the first protruding portion, and the top of the protruding portion is electrically connected to the upper spring sheet.

[0011] In one embodiment, the protruding portion has a top portion with a gradually decreasing width, the first protrusion of the base has a notch, and the top portion of the protruding portion is arranged in the notch.

[0012] In one embodiment, a first tip with a gradually decreasing area is formed in the notch, and the top of the protruding portion also has a second tip with a gradually decreasing area, the second tip cooperates with the first tip and is electrically connected to the upper spring sheet through the second tip.

[0013] In one embodiment, the base embedded metal sheet is further provided with lower spring sheet connecting parts at the four corners of the base to electrically connect the base embedded metal sheet with the lower spring sheet.

[0014] In one embodiment, the end surface of the protruding portion of the base is provided with a base damping rubber groove, and the carrier is also provided with a carrier damping rubber groove, and the base damping rubber groove cooperates with the carrier damping rubber groove to accommodate damping rubber.

[0015] In one embodiment, the upper spring sheet includes an upper spring sheet carrier connecting portion and an upper spring sheet base connecting portion, and the upper spring sheet carrier connecting portion and the base connecting portion of the upper spring sheet are connected after being bent twice by a first elastic member.

[0016] In one embodiment, the lower spring includes a lower spring carrier connecting portion and a lower spring base connecting portion, and the lower spring carrier connecting portion and the lower spring base connecting portion are connected after being bent twice by a third elastic member.

[0017] In one embodiment, the first coil is arranged above the second coil.

[0018] In one embodiment, the carrier includes four sides and four corners, each corner is provided with a second coil, the second coils located at opposite corners are electrically connected, and the free end of each second coil is electrically connected to the second coil connecting portion of the metal sheet embedded in the base.

[0019] In one embodiment, the first protrusion and the second protrusion of the base extend toward the top of the housing by the height of the carrier.

[0020] According to another aspect of the present invention, a carrier for a lens driving device is provided, wherein the carrier has a lower surface facing a base and an upper surface opposite to the lower surface, wherein the interior of the carrier is provided with a carrier center opening extending from the upper surface to the lower surface for mounting a lens, wherein the exterior of the carrier forms side surfaces and corners, wherein a first coil is provided around the periphery of the carrier, and a second coil is provided at the corner of the carrier, wherein the first coil cooperates with a magnet group of an optical element driving device to control the movement of the carrier along the optical axis, and the second coil cooperates with a magnet group of the optical element driving device to control the movement of the carrier along a plane perpendicular to the optical axis.

[0021] In one embodiment, the exterior of the carrier forms four corners and four side surfaces, and each corner is provided with one of the second coils.

[0022] In one embodiment, each side surface is provided with a first coil limiting portion.

[0023] In one embodiment, each side surface is provided with a first coil limiting portion.

[0024] In one embodiment, the first coil is proximate to the upper surface, and the second coil is proximate to the lower surface.

[0025] In one embodiment, an upper spring fixing column is provided on the upper surface of the carrier to be fixedly connected to the inner circle of the upper spring of the optical element driving device.

[0026] In one embodiment, the upper surface is further provided with a carrier damping glue groove, and the carrier damping glue installation groove cooperates with the base damping glue groove on the base to install the damping glue.

[0027] In one embodiment, a winding post is further provided on a side surface of the carrier, and an end of the second coil is wound around the winding post.

[0028] In one embodiment, a carrier damping glue installation groove is provided on the upper surface corresponding to each side surface.

[0029] In one embodiment, adjacent portions of the two damping glue installation grooves are provided with electrical connection portions, and the current is electrically connected to the first coil through the electrical connection portions.

[0030] According to another aspect of the present invention, a base of a lens driving device is provided, the lens driving device comprising a shell, a carrier, an upper spring leaf, a lower spring leaf and the base, the upper spring leaf and the lower spring leaf movably connecting the base and the carrier, the base comprising a bottom plate and a protrusion extending from the bottom plate toward the top surface of the shell, a lens mounting hole being provided in the middle of the bottom plate, and an upper spring leaf fixing portion being provided at the top end of the protrusion so as to be fixedly connected to the outer ring of the upper spring leaf.

[0031] In one embodiment, the protrusion includes two opposite first protrusions and two opposite second protrusions, the top end of the first protrusion is provided with a notch, and the notch is provided with an end portion whose area gradually decreases from bottom to top.

[0032] In one embodiment, a base upper spring fixing column is provided on the upper surface of the protrusion to be fixedly connected to the inner circle of the upper spring.

[0033] In one embodiment, two base upper spring fixing columns are provided on the upper surface of the protrusion, and a groove is provided between the two base upper spring fixing columns.

[0034] In one embodiment, a base damping glue installation groove is further provided on the upper surface of the protrusion, and the base damping glue installation groove is arranged adjacent to the spring fixing column on the base.

[0035] In one embodiment, the upper surface of the first protrusion is provided with a base damping glue installation groove, an upper spring fixing column, a groove, another upper spring fixing column, and the notch in sequence.

[0036] In one embodiment, the upper surface of the second protrusion is provided with a base damping glue installation groove, an upper spring fixing column, a groove and another upper spring fixing column in sequence, wherein the groove is located between the two upper spring fixing columns.

[0037] In one embodiment, the four corners of the bottom plate are further provided with base lower spring fixing columns to be fixedly connected to the outer ring of the lower spring.

[0038] In one embodiment, the base is further provided with a base embedded metal sheet, the base embedded metal sheet is formed with a protruding portion extending integrally toward the top surface of the shell, the protruding portion cooperates with the first protrusion of the base and is arranged inside the first protrusion.

[0039] In one embodiment, the upper portion of the extension portion has a top portion with a gradually decreasing width, and the top portion matches with the notch of the first protrusion.

[0040] In one embodiment, a first tip with a gradually decreasing area is formed in the notch of the first protrusion, and the top of the extension also has a second tip with a gradually decreasing area. The second tip cooperates with the first tip, so that the second tip of the embedded metal sheet is electrically connected to the upper spring sheet.

[0041] In one embodiment, the base embedded metal sheet is further provided with lower spring sheet connecting parts at the four corners of the base, so as to electrically connect the base embedded metal sheet with the lower spring sheet.

[0042] According to another aspect of the present invention, there is also provided a base-embedded metal sheet of a lens driving device, the lens driving device comprising a shell, a carrier, an upper spring sheet, a lower spring sheet and the base, the base-embedded metal sheet comprising an external terminal and formed with an extension portion extending integrally toward the shell, the extension portion cooperating with a first protrusion of the base and arranged inside the first protrusion, the extension portion extending upward from the base to the height of the carrier and being electrically connected to the upper spring sheet arranged on the upper surface of the carrier.

[0043] In one embodiment, the base embedded metal sheet is composed of two independent parts, and each part is formed with one protruding portion.

[0044] In one embodiment, the two parts of the base embedded metal sheet have the same structure, and a plurality of the external terminals are formed on each part.

[0045] In one embodiment, three external terminals are formed on each portion of the base embedded metal sheet.

[0046] In one embodiment, the upper portion of the protruding portion has a top portion with a gradually decreasing width.

[0047] In one embodiment, the top of the protruding portion has a second tip with a gradually decreasing area, and the second tip of the protruding portion cooperates with the first tip in the notch of the base.

[0048] In one embodiment, the base embedded metal sheet is arranged at the four corners of the base and is further provided with a lower spring sheet connecting portion to electrically connect the base embedded metal sheet with the lower spring sheet.

[0049] In one embodiment, the base embedded metal sheet is further provided with a plurality of material strips.

[0050] In one embodiment, the end of the protruding portion extends upward by the height of the carrier, so that the end surface of the protruding portion is flush with the upper surface of the carrier.

[0051] In one embodiment, one end of the two external terminals located outside is connected to the external circuit, and the other end forms a lower spring connecting portion.

[0052] According to another aspect of the present invention, an upper spring of an optical element driving device is also provided, wherein the upper spring comprises a first part and a second part which are independent of each other, wherein the first part and the second part together form an annular structure, wherein the inner circle of the annular structure has four upper spring carrier connecting parts and two first upper spring base connecting parts, wherein the two first upper spring base connecting parts are respectively connected to the two upper spring carrier connecting parts via a first elastic member, and the second upper spring base connecting part is connected to the other two upper spring carrier connecting parts via a second elastic member and is arranged on the outer side of the inner circle, wherein the first elastic member and the second elastic member are bent only twice to form an "S"-shaped bent needle part.

[0053] In one embodiment, the second upper spring base connecting portion is connected to the free end of the second elastic member and is used to be fixed on the end surface of the first protrusion of the base, and the first upper spring base connecting portion is connected to the free end of the first elastic member and is fixed on the end surface of the second extension portion of the base.

[0054] In one embodiment, the two ends of the first part and the second part respectively form an upper spring carrier connecting part and a first upper spring base connecting part, the middle part of the first part and the second part forms another upper spring carrier connecting part, and the upper spring carrier connecting part at the end is connected to the upper spring carrier connecting part in the middle through a connecting strip.

[0055] In one embodiment, the upper leaf spring carrier connection portion of the end portion is connected to the second upper leaf spring base connection portion through the second elastic member.

[0056] In one embodiment, the first part and the second part are each provided with two upper spring carrier connection parts and a first upper spring base connection part and a second upper spring base connection part, and the second upper spring base connection part is arranged adjacent to the upper spring carrier connection part of the middle part.

[0057] In one embodiment, the upper spring sheet carrier connection portion of the end portion is provided with a coil connection portion, and the coil connection portion cooperates with the electrical connection portion on the carrier.

[0058] In one embodiment, the first upper spring base connecting portion and the second upper spring base connecting portion are each provided with a plurality of fixing holes to cooperate with the spring fixing columns on the end surfaces of the first protrusion and the second protrusion of the base.

[0059] In one embodiment, an embedded metal sheet connecting portion is further provided on the second upper spring base connecting portion, and the embedded metal sheet connecting portion cooperates with the tip of the protruding portion of the embedded metal sheet of the base, thereby being electrically connected to the embedded metal sheet of the base.

[0060] In one embodiment, the embedded metal sheet connecting portion is a connecting hole, and the tip of the extending portion of the embedded metal sheet of the base extends into the connecting hole.

[0061] In one embodiment, the connection hole is located at one end of the second upper spring base connection portion, and a material strip is provided at the other end of the second upper spring base connection portion.

[0062] According to another aspect of the present invention, a lower spring of an optical element driving device is also provided, wherein the lower spring is composed of a first part, a second part, a third part and a fourth part which are independent of each other, wherein the first part, the second part, the third part and the fourth part include a lower spring carrier connecting portion and a lower spring base connecting portion, wherein the lower spring carrier connecting portion and the lower spring base connecting portion are connected via a third elastic member, wherein one end of the third elastic member is connected to the lower spring carrier connecting portion, and the other end of the third elastic member is connected to the lower spring base connecting portion.

[0063] In one embodiment, the first part, the second part, the third part and the fourth part are arranged in sequence to form a rectangular structure, the lower spring carrier connecting part and the third elastic member constitute the inner circle of the lower spring, and the lower spring base connecting part is located at the corner and arranged outside the inner circle.

[0064] In one embodiment, the lower spring carrier connection portion is provided with a lower spring carrier connection hole for fixed connection with the spring connection column on the lower surface of the carrier.

[0065] In one embodiment, a second coil connection portion is further provided on the outer side of the lower spring carrier connection portion, and the second coil connection portion cooperates with a winding post on the side surface of the carrier to be electrically connected to the second coil on the carrier.

[0066] In one embodiment, the second coil connection portion is disposed outside the connection hole of the lower spring carrier.

[0067] In one embodiment, the lower spring base connection portion is provided with a lower spring base embedded metal sheet connection portion, and the lower spring base embedded metal sheet connection portion cooperates with the lower spring connection portions at the four corners of the base embedded metal sheet to electrically connect the base embedded metal sheet with the lower spring.

[0068] In one embodiment, the lower spring base connection portion is provided with two lower spring base connection holes, and the lower spring base embedded metal sheet connection portion is arranged between the two lower spring base connection holes.

[0069] In one embodiment, the lower spring carrier connecting parts of the first part, the second part, the third part and the fourth part of the lower spring and the lower spring base connecting part on the same part are connected by a third elastic member, and the third elastic member is bent twice to form an "S"-shaped bending part.

[0070] In one embodiment, the “S”-shaped bending portion is disposed on the inner side of the lower spring base connecting portion and is arranged adjacent to the lower spring base connecting portion.

[0071] In one embodiment, the lower reed carrier connection portion of the first part is arranged adjacent to the lower reed base connection portion of the second part, the lower reed carrier connection portion of the second part is arranged adjacent to the lower reed base connection portion of the third part, the lower reed carrier connection portion of the third part is arranged adjacent to the lower reed base connection portion of the fourth part, and the lower reed carrier connection portion of the fourth part is arranged adjacent to the lower reed base connection portion of the first part.

[0072] The optical element driving device of the present invention does not need to be provided with a circuit board, and the circuit connection is directly performed through the metal sheet embedded in the base, and the structure is reliable and high in strength. At the same time, a protrusion is provided on the base, and a frame is no longer required. By installing the magnet group on the inner wall of the frame, the optical image stabilization and zoom functions can be achieved, and it has excellent technical effects of a small number of parts and a simplified structure. In addition, the weight of the entire upper spring leaf and the lower spring leaf is reduced, and the processing difficulty and cost are reduced, while at the same time, the strength and elastic deformation requirements can be well met. Therefore, the present invention has beneficial technical effects such as simple structure, low cost, and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 is a perspective exploded view of an optical element driving device according to an embodiment of the present invention;

[0074] Figure 2A is a three-dimensional diagram of a carrier according to an embodiment of the present invention;

[0075] Figure 2B is a front view of a carrier according to an embodiment of the present invention;

[0076] Figure 3A is a three-dimensional diagram of a base according to an embodiment of the present invention;

[0077] Figure 3B is a front view of a base according to an embodiment of the present invention;

[0078] Figure 4 It is a three-dimensional picture of the metal sheet embedded in the base;

[0079] Figure 5 is a top view of a base with a base embedded metal sheet installed;

[0080] Figure 6 is a three-dimensional diagram of an upper spring sheet according to an embodiment of the present invention;

[0081] Figure 7 is a front view of a lower spring sheet according to an embodiment of the present invention;

[0082] Figure 8 is a top view of an optical element driving device according to an embodiment of the present invention; and

[0083] Fig. 9 is a cross-sectional view of an optical element driving device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0084] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings 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.

[0085] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments 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 the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0086] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0087] 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 the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0088] The following is combined with Figure 1-9 An optical element driving device according to an embodiment of the present invention is described in detail.

[0089] Figure 1 FIG. 1 is a perspective exploded view of an optical element driving device according to an embodiment of the present invention. Figure 1As shown, an optical element driving device 100 according to an embodiment of the present invention generally comprises a housing 10, an upper spring 20, a carrier 30, a magnet group 40, a damping rubber 50, a lower spring 60, a base 70, and a base embedded metal sheet 80. The magnet group 40 is fixedly mounted inside the housing 10 and cooperates with the coil on the carrier 30. The base embedded metal sheet 80 is arranged inside the base 70, the lower spring 60 is mounted on the base 70, and the base 70 is movably connected to the surface of the carrier 30 facing the base. The upper spring 20 is arranged on the base 30, and the upper surface of the carrier 30 is movably connected to the base 70. The carrier 20 according to an embodiment of the present invention is described in detail below with reference to FIG. 2.

[0090] Figure 2A is a three-dimensional diagram of a carrier 20 according to an embodiment of the present invention. Figure 2B FIG. 2 is a front view of a carrier 20 according to an embodiment of the present invention. Figure 2A , 2B As shown, the carrier 20 has a lower surface 211 facing the base and an upper surface 212 opposite to the lower surface. The carrier 20 is provided with a carrier center opening 21 extending from the upper surface 212 to the lower surface 211 to install the lens. The carrier 20 is formed with four side surfaces 22 and four corners 23 on the outside, and each corner 23 is provided with a second coil 231. Each side surface 22 is provided with a coil limiting portion 221 to limit the first coil 24 to prevent the first coil 24 from moving toward the base. A first coil 24 is also provided around the periphery of the carrier 20. The first coil 24 is provided around the entire periphery of the carrier 20 and is arranged at the corners 23 and the side surfaces 22 of the carrier 20 near the upper surface 212. That is, although the first coil 24 is arranged around the periphery of the carrier 20, it is adjacent to the upper surface 212. In other words, for each corner 23, the second coil 231 on the corner 23 is arranged below the first coil 24, that is, the distance between the second coil 231 and the carrier lower surface 211 is smaller than the distance between the first coil 24 and the lower surface 221. For each side surface 22, the first coil stopper 221 on the side surface 22 is provided below the first coil 24, that is, the distance between the first coil stopper 221 and the lower surface 211 is smaller than the distance between the first coil 24 and the lower surface 211.

[0091] The upper surface 212 is provided with a carrier upper spring fixing column 213 and a carrier damping glue installation groove 214. The carrier upper spring fixing column 213 is fixedly connected to the inner ring of the upper spring, and the carrier damping glue installation groove 214 cooperates with the base damping glue groove on the base to install the damping glue. A carrier damping glue installation groove is provided on the upper surface corresponding to each side surface 22, and the adjacent parts of two of the damping glue installation grooves are provided with electrical connection parts 215, and the current is electrically connected to the first coil 24 through the electrical connection parts 215. In one embodiment, a winding column 25 is also provided on the side surface 22 of the carrier 20, and the end of the second coil 231 is wound on the winding column 25.

[0092] Figure 3A is a three-dimensional diagram of a base 70 according to an embodiment of the present invention. Figure 3B FIG. 7 is a front view of a base 70 according to an embodiment of the present invention. Figure 3A-3B As shown, the base 70 has a bottom plate 71 and a first protrusion 72 and a second protrusion 73 extending from the bottom plate 71 to the housing. A lens mounting hole 711 is provided in the middle of the bottom plate 71, and the aperture of the lens mounting hole 711 matches the aperture of the carrier center opening 21 of the carrier 20 to accommodate the lens. The height of the first protrusion 72 and the second protrusion 73 corresponds to the height of the carrier 20, that is, when the carrier 20 is mounted on the base 70, the upper surface of the carrier 20 is substantially flush with the end surfaces of the first protrusion 72 and the second protrusion 73.

[0093] Specifically, in Figure 3A-3B In the illustrated embodiment, the bottom plate 71 is a rectangular structure and has four side portions, wherein two opposite side portions are provided with first protrusions 72, and the other two opposite side portions are provided with second protrusions 73. A notch 721 is provided at one end of the upper surface of the first protrusion 72, and the notch 721 cooperates with the corresponding structure on the base embedded metal sheet 80, so as to guide the current of the base embedded metal sheet to the upper spring 30. A base upper spring fixing column 722 is also provided on the upper surface of the first protrusion 72 to connect with the outer ring of the upper spring 30. Specifically, two base upper spring fixing columns 722 are provided on the upper surface of the first protrusion 72, and a groove 725 is provided between the two upper spring fixing columns 722. A base damping glue installation groove 723 is also provided on one side of the upper spring fixing column 722, that is, on the upper surface of the first protrusion 72, a base damping glue installation groove 723, one upper spring fixing column 722, a groove 725, another upper spring fixing column 722, and a notch 721 are provided in sequence. The two upper spring fixing columns 722 are located between the notch 721 and the base damping rubber groove 723 , and the groove 725 is located between the two upper spring fixing columns 722 .

[0094] The second protrusion 73 has a similar structure to the first protrusion 72, and the main difference is that the second protrusion 73 is not provided with a notch. Specifically, the upper surface of the second protrusion 73 is provided with a base upper spring fixing column 731 to connect with the outer ring of the upper spring 30. Specifically, the upper surface of the first protrusion 72 is provided with two base upper spring fixing columns 722, and a groove 725 is provided between the two upper spring fixing columns 722. A base damping glue installation groove 723 is also provided on one side of the upper spring fixing column 722, that is, on the upper surface of the second protrusion 72, a base damping glue installation groove 723, an upper spring fixing column 722, a groove 725 and another upper spring fixing column 722 are sequentially provided, and the groove 725 is located between the two upper spring fixing columns 722. The four corners of the bottom plate 71 are also provided with base lower spring fixing columns 74 to connect with the outer ring of the lower spring. Specifically, in this embodiment, two base lower spring fixing columns 74 are provided at each corner.

[0095] Figure 4 is a three-dimensional diagram of a metal sheet 80 embedded in the base. Figure 5 is a top view of the base with the base embedded metal sheet installed. Figure 4-5 As shown, the base embedded metal sheet 80 as a whole is composed of a first part 81 and a second part 82. Of course, those skilled in the art will understand that the first part 81 and the second part 82 can form an integral structure or can be formed as shown in FIG. Figure 4 The mutually independent structures shown. A protrusion 83 extending integrally toward the top surface of the shell is formed on the embedded metal sheet of the base. The protrusion 83 cooperates with the first protrusion 72 of the base 70 and is arranged inside the first protrusion 72. The upper part of the protrusion 83 has a top 831 with a gradually decreasing width, and the top 831 cooperates with the notch 721 of the first protrusion 72. Specifically, a first tip 724 with a gradually decreasing area is formed in the notch 721 of the first protrusion 72, and the top 831 of the protrusion 83 also has a second tip 831 with a gradually decreasing area. The second tip 831 of the protrusion 83 cooperates with the first tip 724, so as to be electrically connected to the upper spring sheet through the second tip 831 of the embedded metal sheet.

[0096] The base embedded metal sheet 80 is also provided with lower spring connecting parts 84 at the four corners of the base, so as to electrically connect the base embedded metal sheet 80 with the lower spring 60. The base embedded metal sheet 80 is also provided with a plurality of external terminals 85, through which the base embedded metal sheet 80 is electrically connected to the outside, so that the current is connected to the first coil and the second coil through the base embedded metal sheet 80.

[0097] Specifically, in Figure 4In the illustrated embodiment, the first part 82 and the second part 82 of the base embedded metal sheet 80 have the same structure, and each of them forms a protrusion 83, so that a total of two protrusions 83 are formed on the base embedded metal sheet 80, and the two protrusions 83 cooperate with the two first protrusions 72 on the base 70. The first part 82 and the second part 83 each form three external terminals 85, and the entire base embedded metal sheet 80 forms six external terminals 85. One end of the two external terminals located outside is connected to the outside, and the other end forms a lower spring connecting portion 84. A plurality of material strips 86 are also formed on the first part 81 and the second part 82, and the material strips 86 also have the function of strengthening the structural strength of the base 70.

[0098] Figure 6 FIG. 2 is a perspective view of an upper spring sheet 30 according to an embodiment of the present invention. Figure 6 As shown, the upper spring 30 as a whole includes a first part 31 and a second part 32 which are independent of each other. The first part 31 and the second part 32 together form a roughly annular structure. The inner circle of the annular structure has four upper spring carrier connecting parts 311 and two first upper spring base connecting parts 312. The first upper spring base connecting part 312 is connected to one upper spring carrier connecting part 311 through a first elastic member 313, and the other two upper spring carrier connecting parts 311 are connected to the second upper spring base connecting part 315 through a second elastic member 314. The second upper spring base connecting part 315 is connected to the free end of the second elastic member 314 and is used to be fixed on the end face of the first protrusion 72 of the base 70. The first upper spring base connecting part 312 is connected to the free end of the first elastic member 313 and is fixed on the end face of the second extension part 73 of the base 70.

[0099] Specifically, in Figure 6 In the illustrated embodiment, an upper spring carrier connection portion 311 and a first upper spring base connection portion 312 are formed at both ends of the first portion 31, and another upper spring carrier connection portion 311 is formed approximately in the middle of the first portion 31. The upper spring carrier connection portion 311 at the end is connected to the upper spring carrier connection portion 311 at the middle by a connecting strip 316. The upper spring carrier connection portion 311 at the end is connected to the second upper spring base connection portion 315 by a second elastic member 314. In other words, two upper spring carrier connection portions 311, a first upper spring base connection portion 312, and a second upper spring base connection portion 315 are provided on the first portion 31, and the second upper spring base connection portion 315 is arranged adjacent to the upper spring carrier connection portion 311 at the middle.

[0100] exist Figure 6In the illustrated embodiment, the first elastic member 313 and the second elastic member 314 are bent only twice to form an "S"-shaped bent needle portion, which reduces the weight of the entire upper spring leaf, and reduces the processing difficulty and cost, while at the same time being able to well meet the strength and elastic deformation requirements.

[0101] Continue to refer to Figure 6 The first upper spring base connection part 312 and the second upper spring base connection part 315 are each provided with two fixing holes that cooperate with the spring fixing columns on the end surfaces of the first protrusion and the second protrusion of the base. The second upper spring base connection part 315 is also provided with an embedded metal sheet connection part 317, which cooperates with the tip of the extension part 83 of the embedded metal sheet of the base, so as to be electrically connected to the embedded metal sheet of the base. In this embodiment, the embedded metal sheet connection part 317 is a connection hole, and the tip of the extension part 83 of the embedded metal sheet 80 of the base extends into the connection hole 317. The connection hole 317 is located at one end of the second upper spring base connection part 315. The other end of the second upper spring base connection part 315 is provided with a material strip 318. The upper spring sheet carrier connection portion 311 located at the end is provided with a coil connection portion 319, and the coil connection portion 319 cooperates with the electrical connection portion 215 on the carrier 20. Since the two ends of the first coil 24 are respectively connected to the electrical connection portions 215 on the two opposite sides of the carrier 20, the upper spring sheet carrier connection portion 311 located at the end is connected with the electrical connection portion 215, so that the embedded metal sheet of the base is electrically connected to the first coil 24 through the embedded metal sheet connection portion 317 and the coil connection portion 319.

[0102] In this embodiment, the first part 31 and the second part 32 of the upper spring sheet 30 are centrally symmetrical and have the same structure, so they will not be described separately in detail in this section. That is to say, the two extensions 83 of the base embedded metal sheet 80 correspond to the first part 31 and the second part 32 of the upper spring sheet 30, and are electrically connected to the two ends of the first coil 24 through the first part 31 and the second part 32 of the upper spring sheet 30. Since the two ends of the entire first coil are respectively connected to the electrical connection parts 215 on the two opposite sides of the carrier 20, the two extensions 83 of the base embedded metal sheet 80 are respectively connected to the positive and negative poles of the external circuit, so that the current in the entire first coil 24 can be conducted.

[0103] Figure 7 FIG. 6 is a front view of the lower spring leaf 60 according to an embodiment of the present invention. Figure 7As shown, the lower spring 60 as a whole is composed of a first part 61, a second part 62, a third part 63 and a fourth part 64 which are independent of each other. The four first parts 61, the second part 62, the third part 63 and the fourth part 64 have the same structure and are arranged in a connected manner. Now, the first part 61 will be described. The first part 61 as a whole includes a lower spring carrier connection part 65 and a lower spring base connection part 66. The lower spring carrier connection part 65 and the lower spring base connection part 66 are connected by a third elastic member 67. One end of the third elastic member 67 is connected to the lower spring carrier connection part 65, and the other end of the third elastic member 67 is connected to the lower spring base connection part 66. When the first part 61, the second part 62, the third part 63 and the fourth part 64 of the lower spring 60 are arranged to form a rectangular ring, the four lower spring carrier connection parts 65 and the third elastic member 67 form the inner circle of the lower spring 60, and the four lower spring base connection parts 66 are located at the four corners and outside the inner circle.

[0104] Continue to refer to Figure 7 The lower spring carrier connection part 65 is provided with a lower spring carrier connection hole 651 to be fixedly connected with the spring connection column on the lower surface of the carrier. The outer side of the lower spring carrier connection part 65 is also provided with a second coil connection part 652. The second coil connection part 652 cooperates with the winding column 25 on the side of the carrier 20 to be electrically connected with the second coil 231 on the carrier 20. The lower spring base connection part 66 is provided with two lower spring base connection holes 661. A lower spring base embedded metal sheet connection part 662 is provided between the two lower spring base connection holes 661. The lower spring base embedded metal sheet connection part 662 cooperates with the lower spring connection parts 84 at the four corners of the base embedded metal sheet 80, so as to electrically connect the base embedded metal sheet 80 with the lower spring 60.

[0105] In one embodiment, the reference Figure 2A The second coils 231 located on the diagonal line are preferably formed by the same wire or electrically connected, and one end of each coil is wound around the winding pole 25 on the adjacent side, and the other end is electrically connected to the coil on the diagonal line. Figure 6The lower spring leaf 60 is composed of a first part 61, a second part 62, a third part 63 and a fourth part 64 which are independent of each other, each part having a lower spring leaf carrier connection part 65 and a lower spring leaf base connection part 66, each lower spring leaf carrier connection part 65 is provided with a second coil connection part 652, and each lower spring leaf base connection part 66 is provided with a lower spring leaf base embedded metal sheet connection part 662. Therefore, through each second coil connection part 652 cooperating with a winding pole 25, one end of the second coil 231 is connected to a second coil connection part 652, and then connected to the base embedded metal sheet 80 through the lower spring leaf base embedded metal sheet connection part 662 on the lower spring leaf base connection part 66 on the same part, so that the second coil 231 located on the diagonal line is connected to the positive and negative poles of the external circuit through the base embedded metal sheet 80 to form a current in the second coil 231 located on the diagonal line. The second coil 231 on one of the diagonals cooperates with the magnet group installed on the inner wall of the shell 10 to drive the carrier 20 to move along an axis (for example, the X-axis) in a plane perpendicular to the optical axis, and the second coil 231 on the other diagonal cooperates with the magnet group installed on the inner wall of the shell 10 to drive the carrier 20 to move along another axis (for example, the Y-axis) in a plane perpendicular to the optical axis. Therefore, the optical image stabilization function of the optical drive device can be realized through the cooperation between the second coil 231 and the magnet group.

[0106] It should be noted that the lower spring carrier connecting portion 65 on each part of the lower spring 60 in this embodiment is connected to the lower spring base connecting portion 66 on the same part through a third elastic member 67, and the third elastic member 67 is only bent twice at one end close to the lower spring base connecting portion 66, forming an "S" shaped bend. Therefore, the weight of the entire lower spring is reduced, and the processing difficulty and cost are reduced, while at the same time it can well meet the strength and elastic deformation requirements.

[0107] It should be noted that since the structures of the first part 61, the second part 62, the third part 63 and the fourth part 64 of the lower spring 60 are the same, they will not be described in detail here. During installation, the lower spring carrier connection part 65 of the first part 61 is arranged adjacent to the lower spring base connection part 66 of the second part 62, the lower spring carrier connection part 65 of the second part 62 is arranged adjacent to the lower spring base connection part 66 of the third part 63, the lower spring carrier connection part 65 of the third part 63 is arranged adjacent to the lower spring base connection part 66 of the fourth part 64, and the lower spring carrier connection part 65 of the fourth part 64 is arranged adjacent to the lower spring base connection part 66 of the first part 61. The lower spring carrier connecting portion 65 is connected to the lower surface of the carrier 20, and the lower spring base connecting portion 66 is connected to the base 70. Since the lower spring carrier connecting portion 65 and the lower spring base connecting portion 66 are connected by the third elastic member 67, the carrier 20 can perform relative movement along the optical axis direction and relative movement on a plane perpendicular to the optical axis relative to the base 70. When the carrier 20 moves along the optical axis direction relative to the base 70, the zoom function is realized, and when the carrier 20 moves on a plane perpendicular to the optical axis, the optical image stabilization function is realized.

[0108] Figure 8 is a top view of an optical element driving device 100 according to an embodiment of the present invention, Fig. 9 FIG. 1 is a cross-sectional view of an optical element driving device 100 according to an embodiment of the present invention. Figure 8-9 Shown and combined Figure 1-7 The overall magnet group 40 of the optical element driving device 100 is fixed on the inner wall of the housing 10, the first coil 24 is arranged around the outer periphery of the upper part of the carrier 20, the second coil 231 is installed at the four corners of the carrier 20, the first coil 24 and the second coil 231 are respectively matched with the magnet column 40 installed on the inner wall of the housing 10, the upper spring piece 30 movably connects the upper surface of the carrier 20 with the end surface of the first protrusion 72 and the second protrusion 73 of the base 70, the lower spring piece 60 movably connects the lower surface of the carrier 20 with the bottom plate 71 of the base 70, and the base embedded metal sheet 80 is arranged inside the base 70 and connects the first coil 24 and the second coil 231 to the external circuit through the upper spring piece 30 and the lower spring piece 60. The housing 10 and the base 70 cooperate to confine each component in the space defined by the housing 10 and the base 70 and protect each component. During operation, the optical image stabilization function of the optical element driving device can be realized by adjusting the internal current of the second coil 231 , and the zoom function of the optical element driving device can be realized by adjusting the internal current of the first coil 24 .

[0109] It should be noted that the optical element driving device of the present invention does not need to be provided with a circuit board, and the circuit connection is directly performed through the metal sheet embedded in the base, and the structure is reliable and high in strength. At the same time, a protrusion is provided on the base, and a frame is no longer required. By installing the magnet group on the inner wall of the frame, the optical image stabilization and zoom functions can be achieved, and the excellent technical effect of a small number of parts and a simplified structure is achieved. In addition, the weight of the entire upper and lower springs is reduced, and the processing difficulty and cost are reduced, while the strength and elastic deformation requirements can be well met.

[0110] In summary, the optical element driving device of the present invention has beneficial technical effects such as simple structure, low cost, and high reliability.

[0111] The preferred embodiments of the present invention have been described in detail above, but 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. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. An optical element driving device, characterized in that: The optical element driving device comprises a housing, a carrier, an upper spring sheet, a lower spring sheet, a magnet group and a base. The carrier is used to mount a lens and is provided with a first coil and a second coil. The magnet group is mounted on the inner wall of the shell and is matched with the first coil and the second coil on the carrier. The base includes a bottom plate and a protrusion extending from the bottom plate to the top of the shell. The upper spring piece movably connects the upper surface of the carrier and the end surface of the protrusion of the base. The lower spring piece movably connects the lower surface of the carrier and the bottom plate of the base. The base is further provided with a base embedded metal sheet, the base embedded metal sheet connects the first coil and the second coil to an external circuit, wherein the first coil cooperates with the magnet group to drive the carrier to move along the optical axis direction to achieve zooming, and the second coil cooperates with the magnet group to drive the carrier to move on a plane perpendicular to the optical axis to achieve optical image stabilization; The base embedded metal sheet is provided with a protruding portion, the protruding portion of the base includes a first protruding portion and a second protruding portion, the protruding portion cooperates with the first protruding portion of the base and is arranged in the first protruding portion, the top of the protruding portion is electrically connected to the upper spring sheet; the protruding portion has a top with a gradually decreasing width, the first protruding portion of the base has a notch, and the top of the protruding portion is arranged in the notch; A first tip with a gradually decreasing area is formed in the notch, and the top of the protruding portion also has a second tip with a gradually decreasing area. The second tip cooperates with the first tip and is electrically connected to the upper spring sheet through the second tip. The first coil is arranged around the entire periphery of the upper portion of the carrier.

2. The optical element driving device according to claim 1, characterized in that: The carrier includes a side surface and a corner portion, the second coil is arranged on the side surface of the corner portion, and the two second coils located on the diagonal portions are electrically connected.

3. The optical element driving device according to claim 2, characterized in that: The two second coils located at opposite corners are made from the same wire.

4. The optical element driving device according to claim 1, characterized in that: The base embedded metal sheet is also provided with lower spring sheet connecting parts at the four corners of the base to electrically connect the base embedded metal sheet with the lower spring sheet.

5. The optical element driving device according to claim 1, characterized in that: The end surface of the protruding portion of the base is provided with a base damping rubber groove, and the carrier is also provided with a carrier damping rubber groove, and the base damping rubber groove cooperates with the carrier damping rubber groove to accommodate damping rubber.

6. The optical element driving device according to claim 1, characterized in that: The upper spring sheet comprises an upper spring sheet carrier connection portion and an upper spring sheet base connection portion, and the upper spring sheet carrier connection portion and the base connection portion of the upper spring sheet are connected after being bent twice by a first elastic member.

7. The optical element driving device according to claim 1, characterized in that: The lower spring comprises a lower spring carrier connecting portion and a lower spring base connecting portion, and the lower spring carrier connecting portion and the lower spring base connecting portion are connected after being bent twice by a third elastic member.

8. The optical element driving device according to claim 1, characterized in that: The first coil is arranged above the second coil.

9. The optical element driving device according to claim 1, characterized in that: The carrier includes four sides and four corners, each corner is provided with a second coil, the second coils at the diagonal positions are electrically connected, and the free end of each second coil is electrically connected to the second coil connection portion of the metal sheet embedded in the base.

10. The optical element driving device according to claim 1, characterized in that: The first and second protrusions of the base extend toward the top of the housing by the height of the carrier.

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