Optical element driving mechanism

Abstract

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a fixed assembly, a first movable part and a driving assembly. The first movable part is configured to be connected to an optical element, and the optical element is provided with an optical axis. The first movable part can move relative to the fixed assembly. The driving assembly is configured to drive the first movable part to move in a first dimension relative to the fixed assembly.

Description

Technical Field

[0001] The utility model relates to an optical element driving mechanism, in particular to a lightweight and miniaturized optical element driving mechanism. Background Art

[0002] With the development of technology, many electronic devices (such as smart phones) now have the function of taking photos or recording videos. Through the camera module installed on the electronic device, the user can operate the electronic device to extract a variety of photos.

[0003] The design of today's electronic devices continues to trend toward miniaturization, forcing the various components and structures of camera modules to shrink in size to achieve this goal. Generally speaking, the drive mechanism in a camera module may include a lens carrier configured to support a lens, and the drive mechanism may also provide autofocus or optical image stabilization functions. However, while existing drive mechanisms can achieve these photo or video functions, they still cannot meet all requirements.

[0004] Therefore, how to design a camera module that can simultaneously perform autofocus and optical image stabilization while achieving miniaturization is a topic worth exploring and solving today. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide an optical element driving mechanism to solve the above-mentioned problem.

[0006] The utility model provides an optical element driving mechanism, comprising a fixed assembly, a first movable portion, and a driving assembly. The first movable portion is configured to be connected to an optical element, and the optical element has an optical axis. The first movable portion is movable relative to the fixed assembly. The driving assembly is configured to drive the first movable portion to move relative to the fixed assembly in a first dimension.

[0007] According to some embodiments of the present invention, the drive assembly includes a first coil and a first magnetic element. The first magnetic element corresponds to the first coil and has a first magnetic element surface facing the first coil. Movement in the first dimension includes movement along a first axial direction. The first axial direction is parallel to the surface of the first magnetic element. The first axial direction is perpendicular to the optical axis. The first coil is fixedly connected to the first movable part. The winding axis of the first coil is parallel to the optical axis. The first coil is configured to sense the first magnetic element to drive the first movable part to move along the first axial direction. The drive assembly also includes a second coil and a second magnetic element. The second magnetic element corresponds to the second coil and has a second magnetic element surface facing the second coil. Movement in the first dimension also includes movement along a second axial direction. The second axial direction is parallel to the surface of the second magnetic element. The second axial direction is perpendicular to the optical axis. The second axial direction is perpendicular to the first axial direction. The second coil is fixedly connected to the first movable part. The second coil is configured to sense the second magnetic element to drive the first movable part to move along the second axial direction.

[0008] According to some embodiments of the present invention, the optical element driving mechanism further includes a circuit assembly fixedly connected to the first movable part. The first coil and the second coil are arranged in the circuit assembly. The first coil is arranged on a first surface of the first movable part. The first surface faces a light emitting end of the optical element driving mechanism. A light ray is incident on the optical element from a light incident end of the optical element driving mechanism and then moves away from the optical element from the light emitting end. The optical element driving mechanism further includes a second movable part movably connected to the first movable part. The first magnetic element and the second magnetic element are arranged in the second movable part. When observed along the optical axis, the second movable part surrounds at least a portion of the first movable part. When observed along the first axial direction or the second axial direction, the second movable part overlaps with at least a portion of the first movable part. When observed along the first axial direction or the second axial direction, the circuit assembly is located between the first movable part and the second movable part.

[0009] According to some embodiments of the present invention, the optical element driving mechanism further includes a support assembly. The support assembly includes a first elastic element configured to be connected to the first movable portion and the second movable portion. The extension direction of the first elastic element is perpendicular to the first axial direction or the second axial direction. When viewed along the optical axis, the shortest distance between the center of the first elastic element and the center of the optical element is less than the shortest distance between the center of the first magnetic element and the center of the optical element. The support assembly further includes a second elastic element having a plate-like structure and configured to be connected to the first movable portion. The first elastic element is connected to the first movable portion via the second elastic element.

[0010] According to some embodiments of the present invention, the support assembly further includes a third elastic element. The second movable portion is connected to the fixed assembly via the third elastic element. The first movable portion is movable relative to the second movable portion. The second movable portion is movable relative to the fixed assembly. The third elastic element has a plate-like structure. The second elastic element is not directly connected to the third elastic element. When viewed in a direction parallel to the second elastic element, the second elastic element overlaps at least a portion of the third elastic element. The support assembly further includes a fourth elastic element. The second movable portion is movably connected to the fixed assembly via the fourth elastic element. The first elastic element has a first end and a second end. The first end is connected to the second elastic element. The second end is connected to the bottom of the second movable portion. A first length is formed between the first end and the second end. A first shortest distance is defined between the third elastic element and the fourth elastic element. The first shortest distance is less than the first length. The first shortest distance is at least two-thirds of the first length.

[0011] According to some embodiments of the present invention, the optical element driving mechanism further includes a first electrically connecting member partially disposed within the first movable portion. The optical element driving mechanism further includes a second electrically connecting member partially disposed within the second movable portion. The optical element driving mechanism further includes a third electrically connecting member partially disposed within the fixed assembly. The first coil is configured to be electrically connected to an external circuit in sequence via the first electrically connecting member, the second elastic element, the first elastic element, the second electrically connecting member, the third elastic element, and the third electrically connecting member.

[0012] According to some embodiments of the present invention, the optical element driving mechanism further includes a first electrically connecting member partially disposed within the first movable portion. The optical element driving mechanism further includes a second electrically connecting member partially disposed within the second movable portion. The optical element driving mechanism further includes a third electrically connecting member partially disposed within the fixed assembly. The first coil is configured to be electrically connected to an external circuit via the first electrically connecting member, the second elastic element, the first elastic element, the second electrical member, the fourth elastic element, and the third electrical member in sequence.

[0013] According to some embodiments of the present invention, the fixing assembly includes a housing and a base. The housing is fixedly connected to the base. When viewed along the optical axis, the housing and the base each have a polygonal structure. The driving assembly also includes a driving coil disposed on the base. The driving coil is configured to induce an electromagnetic driving force with the first magnetic element and the second magnetic element to drive the first movable portion, the second movable portion, and the optical element to move along the optical axis. When viewed along the first or second axial direction, the fourth elastic element is located between the second elastic element and the driving coil. When viewed along the first or second axial direction, the circuit assembly is located between the second elastic element and the fourth elastic element. The base has at least one winding structure, and a lead wire of the driving coil is wound around the at least one winding structure. A receiving space is formed between the housing and the base. The at least one winding structure is disposed within the receiving space. The optical element driving mechanism also includes a plurality of electrical connection components partially disposed within the base. The lead wire is configured to be electrically connected to at least one of the electrical connection components. The optical element driving mechanism also includes a sensing element disposed on a base plate of the base. The optical axis is perpendicular to the base plate. The sensing element is electrically connected to the electrical connection components.

[0014] According to some embodiments of the present invention, at least one winding structure has a first bottom surface. The base has a second bottom surface. The first bottom surface does not overlap the second bottom surface. An accommodation distance is formed between the first bottom surface and the second bottom surface in the direction of the optical axis. The accommodation distance is greater than the maximum width of the cross section of the lead wire. The optical element driving mechanism also includes a first connecting element, which is arranged in the accommodation space. The first connecting element directly contacts the housing, the base, the at least one winding structure, and the lead wire. The first connecting element encloses the accommodation space.

[0015] According to some embodiments of the present invention, the base further comprises a plurality of positioning structures disposed at various corners of the base. The drive coil is wound around these positioning structures to be fixedly mounted on the base. The base further comprises a side structure connected between two corresponding positioning structures. The side structure comprises a hollow space, and a portion of the drive coil is located within the hollow space. A portion of the drive coil is exposed from the hollow space. When viewed in a direction perpendicular to the optical axis, the side structure comprises a first outer side surface and a first inner side surface. The first outer side surface faces the outer shell and directly contacts the outer shell. The first inner side surface faces the first magnetic element. The drive coil comprises a second outer side surface and a second inner side surface. The second outer side surface faces the outer shell. The second inner side surface faces the first magnetic element. The first outer side surface and the second outer side surface form a first distance in the first axial direction. The first distance is greater than zero. The first outer side surface and the first inner side surface form a second distance in the first axial direction. The second outer side surface and the second inner side surface form a third distance in the first axial direction. The second distance is greater than the third distance. The optical element drive mechanism further comprises a first buffer element disposed between the first movable portion and the second movable portion. The optical element driving mechanism further includes a second buffer element disposed between the second movable portion and the base.

[0016] The utility model provides an optical element drive mechanism comprising a fixed assembly, a first movable portion, a second movable portion, a support assembly, and a drive assembly. The first movable portion is movably connected to the second movable portion via the support assembly, and the second movable portion is movably connected to a base of the fixed assembly via the support assembly. When the optical element drive mechanism is shaken, the drive assembly drives the first movable portion to move in the XY plane, thereby achieving optical image stabilization.

[0017] In some embodiments, the second movable portion is configured to surround at least a portion of the first movable portion. That is, the first movable portion is disposed within the second movable portion. This structural configuration not only reduces the dimensions of the first and second movable portions in the first and second axial directions, but also reduces their dimensions along the optical axis, thereby reducing the overall volume of the optical element drive mechanism and achieving miniaturization.

[0018] Furthermore, since the first movable part is only provided with a coil and no magnet, the first movable part can be made lightweight, so that the actuation speed during optical image stabilization can be accelerated, and since the first buffer element and the second buffer element are provided, the first movable part can be quickly positioned without the problem of excessive vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be more clearly understood through the detailed description that follows in conjunction with the accompanying drawings. It is emphasized that, in accordance with standard industry practice, various features are not drawn to scale and are used for illustrative purposes only. In fact, the dimensions of various features may be arbitrarily enlarged or reduced for clarity of illustration.

[0020] Figure 1 2 is a perspective schematic diagram of an optical element driving mechanism according to an embodiment of the present invention.

[0021] Figure 2 1 is an exploded view of an optical element driving mechanism according to an embodiment of the present invention.

[0022] Figure 3 The optical element driving mechanism according to one embodiment of the present invention is Figure 1 Stereoscopic cross-sectional view of line segment AA.

[0023] Figure 4 4 is a perspective view of a partial structure of an optical element driving mechanism according to an embodiment of the present invention.

[0024] Figure 5 FIG1 is a perspective view of a first movable portion and a portion of a driving assembly according to an embodiment of the present invention from another perspective.

[0025] Figure 6 The optical element driving mechanism according to one embodiment of the present invention is Figure 1 A three-dimensional cross-sectional view of part of the structure along the midline segment BB.

[0026] Figure 7 FIG. 1 is a top view of a partial structure of an optical element driving mechanism according to an embodiment of the present invention.

[0027] Figure 8 The optical element driving mechanism according to one embodiment of the present invention is Figure 1 A three-dimensional cross-sectional view of part of the structure along the midline segment CC.

[0028] Figure 9 According to another embodiment of the present invention, the optical element driving mechanism is Figure 1 A three-dimensional cross-sectional view of part of the structure along the midline segment CC.

[0029] Figure 10 It is a front view of a partial structure of an optical element driving mechanism according to one embodiment of the present utility model.

[0030] Figure 11 4 is a bottom perspective view of an optical element driving mechanism according to an embodiment of the present invention.

[0031] Figure 123D is a perspective view of a base and a driving coil DCL according to an embodiment of the present invention.

[0032] Figure 13 FIG. 1 is an enlarged perspective view of the optical element driving mechanism according to an embodiment of the present invention from another perspective.

[0033] Figure 14 The optical element driving mechanism according to one embodiment of the present invention is Figure 1 Stereoscopic cross-section of midline segment DD.

[0034] The reference numerals are as follows:

[0035] 100: Optical element drive mechanism

[0036] 102: Shell

[0037] 1021: Shell opening

[0038] 1023: Accommodation space

[0039] 104: Second Activity Department

[0040] 106: second elastic element

[0041] 107: first elastic element

[0042] 1071: First End

[0043] 1072: Second end

[0044] 107C: Center

[0045] 108: First Activity Department

[0046] 108S: First surface

[0047] 109: third elastic element

[0048] 110: Fourth elastic element

[0049] 112: Base

[0050] 1120: Base plate

[0051] 1121: Base opening

[0052] 1125: Winding structure

[0053] 1127: First bottom surface

[0054] 112BS: Second bottom surface

[0055] 112P: Positioning structure

[0056] 112S: Containment Space

[0057] 113: Side structure

[0058] 1131: Hollow Space

[0059] 1133: first outer side

[0060] 1134: first inner side

[0061] 114: Circuit components

[0062] 116: first electrical connection component

[0063] 118: Second electrical connection component

[0064] 120: third electrical connection component

[0065] 122: Electrical connection component

[0066] 131: first cushioning element

[0067] 132: Second cushioning element

[0068] AE1: First Adhesive Component

[0069] AX1: first axis

[0070] AX2: Second axis

[0071] CL1: First coil

[0072] CL2: Second coil

[0073] CLX1: Winding spool

[0074] DA: Drive assembly

[0075] DCL: drive coil

[0076] DCL1: Second outer side

[0077] DCL2: Second medial surface

[0078] DS1: First Distance

[0079] DS2: Second distance

[0080] DS3: Third Distance

[0081] FA:Fixed components

[0082] LEX: Light output end

[0083] LH1: First Length

[0084] LIX: Light incident end

[0085] LT: Light

[0086] MA:Active Component

[0087] md1: shortest distance

[0088] md2: shortest distance

[0089] MDS1: First shortest distance

[0090] MG1: first magnetic element

[0091] MG2: Second magnetic element

[0092] MGC: Center

[0093] MGS1: first magnetic element surface

[0094] O: Optical axis

[0095] OE: Optical Components

[0096] OEC: Center

[0097] RDS: Retention Distance

[0098] SE: Sensing element

[0099] SPA: Support components

[0100] WR1, WR2: lead wire

[0101] X: X axis

[0102] Y: Y axis

[0103] Z: Z axis DETAILED DESCRIPTION

[0104] The following discloses many different implementation methods or examples to implement the different features of the provided subject matter. The following describes specific embodiments of the components and their arrangements to illustrate the present invention. Of course, these embodiments are only for illustration and should not be used to limit the scope of the present invention. For example, when the specification mentions that a first feature component is formed on a second feature component, it may include an embodiment in which the first feature component and the second feature component are in direct contact. It may also include an embodiment in which there are other features between the first feature component and the second feature component. In other words, the first feature component and the second feature component are not in direct contact.

[0105] In addition, repeated numbers or marks may be used in different embodiments. These repetitions are only for the purpose of simply and clearly describing the present invention and do not represent a specific relationship between the different embodiments and / or structures discussed. In addition, in the present invention, forming, connecting and / or coupling to another feature component on top of another feature component may include embodiments in which the feature components are formed to be in direct contact, and may also include embodiments in which additional feature components can be formed to be inserted into the above-mentioned feature components, so that the above-mentioned feature components may not be in direct contact. In addition, spatially related words such as "vertical", "above", "up", "below", "bottom" and similar words (such as "downwardly", "upwardly", etc.) may be used. These spatially related words are for the purpose of facilitating the description of the relationship between one (or some) element or feature and another (or some) element or feature in the diagram. These spatially related words are intended to cover different directions of the device including the feature.

[0106] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meanings as commonly understood by those skilled in the art to which this disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with the background or context of the relevant technology and the present invention, and should not be interpreted in an idealized or overly formal manner unless otherwise defined herein.

[0107] Furthermore, the use of ordinal numbers such as "first" and "second" in the specification and claims to modify claim elements does not in itself imply or represent that the claimed element has any previous ordinal number, nor does it represent the order of one claimed element and another claimed element, or the order in the manufacturing method. The use of multiple ordinal numbers is only used to clearly distinguish a claimed element with a certain name from another claimed element with the same name.

[0108] Furthermore, in some embodiments of the present invention, terms such as "connected" and "interconnected" may refer to two structures being in direct contact, or may refer to two structures not being in direct contact, with another structure positioned between them, unless otherwise specified. Furthermore, such terms may include situations where both structures are movable or both structures are fixed.

[0109] Please refer to Figures 1 to 3 , Figure 1 FIG. 1 is a perspective diagram of an optical element driving mechanism 100 according to an embodiment of the present invention. Figure 2 is an exploded view of an optical element driving mechanism 100 according to an embodiment of the present invention, and Figure 3 The optical element driving mechanism 100 according to an embodiment of the present invention is Figure 1A three-dimensional cross-sectional view of the line segment AA in FIG. The optical element driving mechanism 100 may be an optical camera module configured to carry and drive an optical element. The optical element driving mechanism 100 can be installed in various electronic devices or portable electronic devices, such as a smartphone, so that the user can perform image capture functions. In this embodiment, the optical element driving mechanism 100 may be a voice coil motor (VCM) with an autofocus (AF) function, but the present invention is not limited thereto. In other embodiments, the optical element driving mechanism 100 may also have autofocus (AF) and optical image stabilization (OIS) functions.

[0110] In this embodiment, the optical element driving mechanism 100 may include a fixed assembly FA, ​​a movable assembly MA, and a driving assembly DA. The movable assembly MA is movably connected to the fixed assembly FA and is configured to carry an optical element OE. The driving assembly DA is configured to drive the movable assembly MA to move relative to the fixed assembly FA. It should be noted that for the sake of clarity in the figure, Figure 2 The optical element OE is omitted, but it does not mean that it does not exist.

[0111] In this embodiment, if Figure 2 As shown, the fixed assembly FA includes a housing 102 and a base 112, and the housing 102 is fixedly connected to the base 112. The movable assembly MA includes a first movable portion 108, the aforementioned optical element OE ( Figure 1 ) and a second movable portion 104, and the first movable portion 108 is configured to connect to the optical element OE. The optical element OE has an optical axis O, and the first movable portion 108 can move relative to the fixed component FA.

[0112] The housing 102 has a hollow structure and is formed with a housing opening 1021. The base 112 also has a base opening 1121. The center of the housing opening 1021 corresponds to the optical axis O of the optical element OE carried by the first movable portion 108. The base opening 1121 also corresponds to the image sensor (not shown) disposed below the base 112. The housing 102 may have an accommodating space 1023 for accommodating the movable assembly MA (including the optical element, the first movable portion 108, and the second movable portion 104) and the drive assembly DA.

[0113] Please continue to refer to Figures 1 to 5 . Figure 4 is a perspective view of a partial structure of an optical element driving mechanism 100 according to an embodiment of the present invention, and Figure 5This is a perspective view of a portion of the first movable portion 108 and the drive assembly DA from another perspective according to one embodiment of the present invention. The drive assembly DA is configured to drive the first movable portion 108 to move in a first dimension relative to the fixed assembly FA. The movement in the first dimension includes movement along a first axial direction AX1.

[0114] In this embodiment, if Figure 4 and Figure 5 As shown, the driving assembly DA may include two first coils CL1 and two first magnetic elements MG1. The first magnetic element MG1 corresponds to the first coil CL1 and has a first magnetic element surface MGS1 facing the first coil CL1. The first magnetic element surface MGS1 is, for example, Figure 4 The top surface of the first magnetic element MG1 in .

[0115] The first axis AX1 is parallel to the first magnetic element surface MGS1, that is, the first axis AX1 is perpendicular to the normal of the first magnetic element surface MGS1. Furthermore, the first axis AX1 is perpendicular to the optical axis O, and the winding axis CLX1 of the first coil CL1 can be parallel to the optical axis O.

[0116] When the two first coils CL1 are energized, the two first coils CL1 are configured to induce the two first magnetic elements MG1 to generate a first driving force to drive the first movable portion 108 and the optical element OE to move along the first axial direction AX1.

[0117] Similarly, the driving assembly DA may further include two second coils CL2 and two second magnetic elements MG2. The second magnetic element MG2 corresponds to the second coil CL2 and has a second magnetic element surface MGS2 facing the second coil CL2. The second magnetic element surface MGS2 is, for example, Figure 4 The top surface of the second magnetic element MG2 in .

[0118] In this embodiment, the first-dimensional motion also includes motion along a second axis AX2. The second axis AX2 is parallel to the second magnetic element surface MGS2. That is, the second axis AX2 is perpendicular to the normal of the second magnetic element surface MGS2. Furthermore, the second axis AX2 is perpendicular to the optical axis O and perpendicular to the first axis AX1.

[0119] When the two second coils CL2 are energized, the two second coils CL2 are configured to induce the two second magnetic elements MG2 to generate a second driving force to drive the first movable portion 108 and the optical element OE to move along the second axis AX2.

[0120] Based on the above configuration, when the optical element driving mechanism 100 is shaken, the first movable portion 108 can be driven by the first driving force or the second driving force to move on the XY plane, thereby achieving the purpose of optical image stabilization.

[0121] In this embodiment, if Figure 2 and Figure 4 As shown, the optical element driving mechanism 100 may further include a circuit assembly 114 fixedly connected to the first movable portion 108, and the first coil CL1 and the second coil CL2 are disposed in the circuit assembly 114. Therefore, the first coil CL1 is also fixedly connected to the first movable portion 108, and the second coil CL2 is also fixedly connected to the first movable portion 108.

[0122] In this embodiment, the circuit component 114 is, for example, a printed circuit board, but is not limited thereto. In other embodiments, the circuit component 114 may be, but is not limited thereto, a flexible circuit board.

[0123] It is worth noting that Figure 3 As shown, a light LT is incident on the optical element OE from a light incident end LIX of the optical element driving mechanism 100 and then leaves the optical element OE from a light emitting end LEX, and as shown in FIG. Figure 5 As shown, the first coil CL1 and the second coil CL2 are disposed on a first surface 108S of the first movable portion 108 , wherein the first surface 108S faces the light emitting end LEX of the optical element driving mechanism 100 .

[0124] Furthermore, if Figure 2 and Figure 4 As shown, the first magnetic element MG1 and the second magnetic element MG2 are fixedly disposed on the second movable portion 104 , and when viewed along the optical axis O, the second movable portion 104 surrounds at least a portion of the first movable portion 108 .

[0125] Furthermore, if Figure 4 As shown, when viewed along the first axis AX1 or the second axis AX2, the second movable portion 104 overlaps at least a portion of the first movable portion 108 , and when viewed along the first axis AX1 or the second axis AX2 , the circuit component 114 is located between the first movable portion 108 and the second movable portion 104 .

[0126] Based on the above structural configuration, not only can the sizes of the first movable part 108 and the second movable part 104 in the first axial direction AX1 and the second axial direction AX2 be reduced, but also the sizes of the two on the optical axis O can be reduced, thereby reducing the overall volume of the optical element driving mechanism 100 and achieving the purpose of miniaturization.

[0127] Please refer to Figure 2 and Figures 6 and 7 . Figure 6 The optical element driving mechanism 100 according to an embodiment of the present invention is Figure 1 A three-dimensional cross-sectional view of the portion of the structure along the midline segment BB, and Figure 7 FIG. 1 is a top view of a partial structure of an optical element driving mechanism 100 according to an embodiment of the present invention.

[0128] In this embodiment, the optical element driving mechanism 100 further includes a first buffer element 131 disposed between the first movable portion 108 and the second movable portion 104, and a second buffer element 132 disposed between the second movable portion 104 and the base 112. The first buffer element 131 and the second buffer element 132 are, for example, but not limited to, gel.

[0129] Based on the configuration of the first cushioning element 131 and the second cushioning element 132 , the first movable portion 108 can quickly reach a position when optical image stabilization is performed without causing excessive vibration.

[0130] Furthermore, in this embodiment, the optical element driving mechanism 100 may further include a supporting assembly SPA configured to be connected to the first movable portion 108 , the second movable portion 104 and the base 112 , so that the first movable portion 108 is movably connected to the second movable portion 104 , and the second movable portion 104 is movably connected to the base 112 .

[0131] like Figure 2 and Figure 6 As shown, the support assembly SPA may have four first elastic elements 107, and each first elastic element 107 has a columnar structure, and its extension direction is perpendicular to the first axis AX1 or the second axis AX2. In other words, the extension direction of the first elastic element 107 may be parallel to the Z axis.

[0132] like Figure 7 As shown, when viewed along the optical axis O, the shortest distance md1 between the center 107C of the first elastic element 107 and the center OEC of the optical element OE is smaller than the shortest distance md2 between the center MGC of the first magnetic element MG1 and the center OEC of the optical element OE.

[0133] like Figure 2 and Figure 6 As shown, the supporting assembly SPA may further include four second elastic elements 106 , each having a plate-like structure and configured to be connected to the first movable portion 108 , and the first elastic element 107 is connected to the first movable portion 108 via the second elastic elements 106 .

[0134] like Figure 6 As shown, the support assembly SPA may further include four third elastic elements 109, and the second movable portion 104 is movably connected to the base 112 of the fixed assembly FA via the four third elastic elements 109. Based on the configuration of the plurality of elastic elements, the first movable portion 108 can move relative to the second movable portion 104, and the second movable portion 104 can move relative to the base 112 of the fixed assembly FA.

[0135] Similarly, the third elastic element 109 may have a plate-like structure, and the second elastic element 106 is not directly connected to the third elastic element 109. When viewed along a direction parallel to the second elastic element 106 (e.g., along the first axial direction AX1 or the second axial direction AX2), the second elastic element 106 overlaps at least a portion of the third elastic element 109.

[0136] Please refer to Figure 2 as well as Figure 8 . Figure 8 The optical element driving mechanism 100 according to an embodiment of the present invention is Figure 1 The support assembly SPA may further include four fourth elastic elements 110 , and the second movable portion 104 may be movably connected to the base 112 of the fixing assembly FA via the fourth elastic elements 110 .

[0137] like Figure 8 As shown, the first elastic element 107 has a first end 1071 and a second end 1072 . The first end 1071 can be connected to the second elastic element 106 by soldering, and the second end 1072 can be connected to the bottom of the second movable portion 104 by soldering.

[0138] It should be noted that a first length LH1 is formed between the first end 1071 and the second end 1072 , and a first shortest distance MDS1 is formed between the third elastic element 109 and the fourth elastic element 110 .

[0139] In this embodiment, the first shortest distance MDS1 is smaller than the first length LH1. For example, the first shortest distance MDS1 is at least two-thirds of the first length LH1, but is not limited thereto.

[0140] like Figure 8As shown, the optical element driving mechanism 100 may further include at least one first electrical connection member 116, which is partially disposed in the first movable portion 108. The optical element driving mechanism 100 may further include at least one second electrical connection member 118, which is partially disposed in the second movable portion 104. The optical element driving mechanism 100 may further include at least one third electrical connection member 120, which is partially disposed in the base 112 of the fixing assembly FA.

[0141] The first electrical connection member 116 , the second electrical connection member 118 , and the third electrical connection member 120 may be made of metal and may be formed in the first movable portion 108 , the second movable portion 104 , and the base 112 respectively by insert molding technology.

[0142] Therefore, the first coil CL1 can be configured to be electrically connected to an external circuit in the order of the first electrical connection member 116 , the second elastic element 106 , the first elastic element 107 , the second electrical connection member 118 , the third elastic element 109 and the third electrical connection member 120 .

[0143] Similarly, the second coil CL2 can also be electrically connected to an external circuit through the same configuration and path. The external circuit is, for example, a control chip configured to input control signals to activate the first coil CL1 and the second coil CL2.

[0144] The paths for electrically connecting the first coil CL1 and the second coil CL2 of the driving component DA to the external circuit are not limited to the above embodiments. For example, please refer to Figure 9 , Figure 9 According to another embodiment of the present invention, the optical element driving mechanism 100 is driven along Figure 1 A three-dimensional cross-sectional view of part of the structure along the midline segment CC.

[0145] In this embodiment, the first coil CL1 is configured to be electrically connected to the aforementioned external circuit via the first electrical connection member 116 , the second elastic element 106 , the first elastic element 107 , the second electrical connection member 118 , the fourth elastic element 110 and the third electrical connection member 120 in sequence.

[0146] Please refer to Figure 3 and Figure 10 . Figure 10This is a front view of a portion of the optical element drive mechanism 100 according to one embodiment of the present invention. In this embodiment, the drive assembly DA further includes a drive coil DCL disposed on a base 112. When energized, the drive coil DCL reacts with the first magnetic element MG1 and the second magnetic element MG2 to generate an electromagnetic driving force, thereby driving the first movable portion 108, the second movable portion 104, and the optical element OE to move along the optical axis O, thereby achieving autofocus.

[0147] When the first movable portion 108, the second movable portion 104 and the optical element OE move along the optical axis O, since the rigidity of the first elastic element 107 in the Z-axis direction is much greater than the rigidity in the XY plane, the second movable portion 104 will drive the first movable portion 108 and the optical element OE to move along the optical axis O, and the first movable portion 108 and the second movable portion 104 will not move relative to each other on the optical axis.

[0148] In addition, in this embodiment, if Figure 10 As shown, when viewed along the first axis AX1 or the second axis AX2 (Y-axis), the fourth elastic element 110 is located between the second elastic element 106 and the drive coil DCL. Furthermore, when viewed along the first axis AX1 or the second axis AX2, the circuit component 114 is located between the second elastic element 106 and the fourth elastic element 110.

[0149] Please refer to Figure 2 、 Figure 7 、 Figure 11 as well as Figure 12 . Figure 11 is a bottom perspective view of an optical element driving mechanism 100 according to an embodiment of the present invention, and Figure 12 FIG is a perspective view of the base 112 and the driving coil DCL according to an embodiment of the present invention. Figure 2 and Figure 7 As shown, when viewed along the optical axis O, the housing 102 and the base 112 each have a polygonal structure, such as a rectangular structure, but not limited thereto.

[0150] Furthermore, if Figure 11 As shown, the base 112 has two winding structures 1125, and the two lead wires WR1 and WR2 of the driving coil DCL are respectively wound on the two winding structures 1125. In addition, a receiving space 112S can be formed between the housing 102 and the base 112, and the two winding structures 1125 are disposed in the receiving space 112S.

[0151] Then, if Figure 11 and Figure 12As shown, the optical element driving mechanism 100 may further include a plurality of electrical connection components 122, which are partially disposed in the base 112. These electrical connection components 122 are made of metal material and are Figure 11 As shown, the lead wires WR1 and WR2 are configured to be electrically connected to corresponding electrical connection components 122 , for example, by welding.

[0152] Based on such a configuration, not only can the purpose of miniaturization be achieved, but also the convenience for operators to weld the drive coil DCL can be increased, thereby increasing production efficiency.

[0153] In this embodiment, if Figure 12 As shown, the optical element driving mechanism 100 may further include a sensing element SE disposed on a bottom plate 1120 of the base 112, with the optical axis O being perpendicular to the bottom plate 1120. The sensing element SE is electrically connected to the electrical connection members 122 and can communicate with the aforementioned external circuit through the electrical connection members 122 to control the driving coil DCL, the first coil CL1, and the second coil CL2.

[0154] Please refer to Figure 11 and Figure 13 , Figure 13 FIG. 1 is a perspective enlarged view of the optical element driving mechanism 100 according to an embodiment of the present invention at another viewing angle. Figure 13 As shown, the winding structure 1125 may have a first bottom surface 1127 , the base 112 may have a second bottom surface 112BS, and the first bottom surface 1127 does not overlap with the second bottom surface 112BS.

[0155] Specifically, a receiving distance RDS is formed between the first bottom surface 1127 and the second bottom surface 112BS in the direction of the optical axis O (Z axis), and the receiving distance RDS is greater than the maximum width (e.g., diameter) of the cross section of the lead wire WR1. Based on this configuration, the lead wires WR1 and WR2 can be prevented from protruding outside the receiving space 112S.

[0156] Furthermore, the optical element driving mechanism 100 may further include a first connecting element AE1 disposed in the receiving space 112S, and the first connecting element AE1 directly contacts the housing 102 , the base 112 , the two winding structures 1125 , and the lead wires WR1 and WR2 .

[0157] The first bonding element AE1 is, for example, glue, configured to connect the housing 102 to the base 112 and seal the receiving space 112S. In addition, the first bonding element AE1 can also secure and protect the lead wires WR1 and WR2 to prevent the lead wires WR1 and WR2 from falling off the winding structure 1125.

[0158] Please refer to Figure 12 and Figure 14 , Figure 14 The optical element driving mechanism 100 according to an embodiment of the present invention is Figure 1 The three-dimensional cross-section of the midline segment DD. Figure 12 As shown, the base 112 may further have a plurality of positioning structures 112P, respectively disposed at a plurality of corners of the base 112. In this embodiment, the base has eight positioning structures 112P, and each pair of positioning structures 112P is disposed at one of the four corners of the base 112.

[0159] The driving coil DCL is wound around the positioning structures 112P to be fixedly disposed on the base 112. Furthermore, the base 112 may further have four side structures 113, and each side structure 113 is connected between two corresponding positioning structures 112P.

[0160] In this embodiment, each side structure 113 may have a hollow space 1131 , and a portion of the driving coil DCL is located in the hollow space 1131 , and a portion of the driving coil DCL is exposed from the hollow space 1131 .

[0161] Based on such a configuration, not only can the driving coil DCL be firmly fixed on the base 112, but also the weight of the base 112 can be reduced due to the provision of multiple hollow spaces 1131, thereby achieving the purpose of lightweighting the optical element driving mechanism 100.

[0162] Then continue to refer to Figure 14 In this embodiment, when viewed along a direction perpendicular to the optical axis O, for example, along the first axial direction AX1 or the second axial direction AX2, the side structure 113 may have a first outer side surface 1133 and a first inner side surface 1134. The first outer side surface 1133 faces the housing 102 and may directly contact the housing 102, and the first inner side surface 1134 faces the first magnetic element MG1.

[0163] Similarly, the driving coil DCL may have a second outer side surface DCL1 and a second inner side surface DCL2 , wherein the second outer side surface DCL1 faces the housing 102 , and the second inner side surface DCL2 faces the first magnetic element MG1 .

[0164] like Figure 14 As shown, a first distance DS1 is formed between the first outer side surface 1133 and the second outer side surface DCL1 in the first axial direction AX1, and the first distance DS1 is greater than zero.

[0165] Furthermore, a second distance DS2 is formed between the first outer side surface 1133 and the first inner side surface 1134 in the first axial direction AX1 , a third distance DS3 is formed between the second outer side surface DCL1 and the second inner side surface DCL2 in the first axial direction AX1 , and the second distance DS2 is greater than the third distance DS3 .

[0166] Based on such a configuration, the driving coil DCL can be brought closer to the first magnetic element MG1 and the second magnetic element MG2 to increase the magnitude of the aforementioned electromagnetic driving force, thereby pushing a larger and heavier optical element OE, and also avoiding the problem of the driving coil DCL contacting the housing 102 and causing damage to the driving coil DCL.

[0167] The present invention provides an optical element driving mechanism 100, comprising a fixed assembly FA, ​​a first movable portion 108, a second movable portion 104, a support assembly SPA, and a driving assembly DA. The first movable portion 108 is movably connected to the second movable portion 104 via the support assembly SPA, and the second movable portion 104 is movably connected to the base 112 of the fixed assembly FA via the support assembly SPA. When the optical element driving mechanism 100 is shaken, the driving assembly DA drives the first movable portion 108 to move in the XY plane, thereby achieving optical image stabilization (OIS).

[0168] In some embodiments, the second movable portion 104 is configured to surround at least a portion of the first movable portion 108. That is, the first movable portion 108 is disposed within the second movable portion 104. This structural configuration not only reduces the dimensions of the first movable portion 108 and the second movable portion 104 along the first and second axes AX1 and AX2, but also reduces their dimensions along the optical axis O, thereby reducing the overall volume of the optical element driving mechanism 100 and achieving miniaturization.

[0169] Furthermore, since the first movable portion 108 is only provided with a coil and no magnet, the first movable portion 108 can be made lightweight, thereby increasing the actuation speed during optical image stabilization. In addition, since the first buffer element 131 and the second buffer element 132 are provided, the first movable portion 108 can be quickly positioned without causing excessive vibration.

[0170] Although the embodiments of the present invention and their advantages have been disclosed above, it should be understood that those skilled in the art may make changes, substitutions and modifications without departing from the spirit and scope of the present invention. In addition, the scope of protection of the present invention is not limited to the processes, machines, manufactures, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any technician in the relevant technical field can understand from the disclosure of the present invention that the processes, machines, manufactures, material compositions, devices, methods and steps currently or in the future are developed. As long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can all be used according to the present invention. Therefore, the scope of protection of the present invention includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of the present invention also includes the combination of each claim and embodiment.

Claims

1. An optical element driving mechanism, characterized in that: include: a fixing component; a first movable portion configured to be connected to an optical element, wherein the optical element has an optical axis, wherein the first movable portion is movable relative to the fixed component; and a driving assembly configured to drive the first movable portion to move relative to the fixed assembly in a first dimension; The optical element driving mechanism further includes a second movable portion movably connected to the first movable portion; When viewed along the optical axis, the second movable portion surrounds at least a portion of the first movable portion.

2. The optical element driving mechanism according to claim 1, wherein: The driving assembly includes a first coil and a first magnetic element; The first magnetic element corresponds to the first coil and has a first magnetic element surface facing the first coil; Movement in the first dimension includes movement along a first axial direction; The first axial direction is parallel to the surface of the first magnetic element; The first axial direction is perpendicular to the optical axis; The first coil is fixedly connected to the first movable part; The winding axis of the first coil is parallel to the optical axis; The first coil is configured to induce the first magnetic element to drive the first movable portion to move along the first axial direction; The driving assembly further includes a second coil and a second magnetic element; The second magnetic element corresponds to the second coil and has a second magnetic element surface facing the second coil; The movement in the first dimension also includes movement along a second axis; The second axial direction is parallel to the surface of the second magnetic element; The second axial direction is perpendicular to the optical axis; The second axial direction is perpendicular to the first axial direction; The second coil is fixedly connected to the first movable part; The second coil is configured to induce the second magnetic element to drive the first movable portion to move along the second axial direction.

3. The optical element driving mechanism according to claim 2, wherein: The optical element driving mechanism further includes a circuit assembly fixedly connected to the first movable portion; The first coil and the second coil are disposed in the circuit component; The first coil is disposed on a first surface of the first movable portion; The first surface faces a light emitting end of the optical element driving mechanism; A light ray enters the optical element from a light incident end of the optical element driving mechanism and then leaves the optical element from the light emitting end; The first magnetic element and the second magnetic element are disposed on the second movable portion; When viewed along the first axial direction or the second axial direction, the second movable portion overlaps at least a portion of the first movable portion; When viewed along the first axial direction or the second axial direction, the circuit component is located between the first movable portion and the second movable portion.

4. The optical element driving mechanism according to claim 3, wherein: The optical element driving mechanism also includes a supporting assembly; The supporting assembly has a first elastic element configured to be connected to the first movable portion and the second movable portion; The extension direction of the first elastic element is perpendicular to the first axial direction or the second axial direction; When viewed along the optical axis, the shortest distance between the center of the first elastic element and the center of the optical element is smaller than the shortest distance between the center of the first magnetic element and the center of the optical element; The support assembly further comprises a second elastic element having a plate-like structure and configured to be connected to the first movable portion; The first elastic element is connected to the first movable portion via the second elastic element.

5. The optical element driving mechanism according to claim 4, wherein: The support assembly also has a third elastic element; The second movable portion is connected to the fixing assembly via the third elastic element; The first movable portion is movable relative to the second movable portion; The second movable portion is movable relative to the fixed component; The third elastic element has a plate-like structure; The second elastic element is not directly connected to the third elastic element; When viewed along a direction parallel to the second elastic element, the second elastic element overlaps at least a portion of the third elastic element; The support assembly further includes a fourth elastic element; The second movable portion is movably connected to the fixing assembly via the fourth elastic element; The first elastic element has a first end and a second end; The first end is connected to the second elastic element; The second end is connected to the bottom of the second movable part; A first length is formed between the first end and the second end; There is a first shortest distance between the third elastic element and the fourth elastic element; The first shortest distance is smaller than the first length; The first shortest distance is at least two-thirds of the first length.

6. The optical element driving mechanism according to claim 5, wherein: The optical element driving mechanism further includes a first electrical connection member partially disposed in the first movable portion; The optical element driving mechanism further includes a second electrical connection member partially disposed in the second movable portion; The optical element driving mechanism further includes a third electrical connection member partially disposed within the fixing assembly; The first coil is configured to be electrically connected to an external circuit via the first electrical connection member, the second elastic element, the first elastic element, the second electrical connection member, the third elastic element, and the third electrical connection member in sequence.

7. The optical element driving mechanism according to claim 5, wherein: The optical element driving mechanism further includes a first electrical connection member partially disposed in the first movable portion; The optical element driving mechanism further includes a second electrical connection member partially disposed in the second movable portion; The optical element driving mechanism further includes a third electrical connection member partially disposed within the fixing assembly; The first coil is configured to be electrically connected to an external circuit via the first electrical connection member, the second elastic element, the first elastic element, the second electrical connection member, the fourth elastic element, and the third electrical connection member in sequence.

8. The optical element driving mechanism according to claim 5, wherein: The fixing assembly includes a shell and a base; The housing is fixedly connected to the base; When viewed along the optical axis, the housing and the base each have a polygonal structure; The driving assembly further includes a driving coil disposed on the base; The driving coil is configured to induce an electromagnetic driving force with the first magnetic element and the second magnetic element to drive the first movable portion, the second movable portion and the optical element to move along the optical axis; When viewed along the first axial direction or the second axial direction, the fourth elastic element is located between the second elastic element and the driving coil; When viewed along the first axis or the second axis, the circuit component is located between the second elastic element and the fourth elastic element; The base has at least one winding structure, and a lead wire of the driving coil is wound around the at least one winding structure; A receiving space is formed between the shell and the base; The at least one winding structure is disposed in the receiving space; The optical element driving mechanism further includes a plurality of electrical connection components, which are partially disposed in the base; The lead wire is configured to be electrically connected to at least one of the plurality of electrical connection components; The optical element driving mechanism further includes a sensing element disposed on a bottom plate of the base; The optical axis is perpendicular to the base plate; The sensing element is electrically connected to the plurality of electrical connection components.

9. The optical element driving mechanism according to claim 8, wherein: The at least one winding structure has a first bottom surface; The base has a second bottom surface; The first bottom surface does not overlap the second bottom surface; An accommodation distance is formed between the first bottom surface and the second bottom surface in the direction of the optical axis; The accommodation distance is greater than the maximum width of the cross section of the lead wire; The optical element driving mechanism further includes a first connecting element disposed in the receiving space; The first connecting element directly contacts the housing, the base, the at least one winding structure and the lead wire; The first connecting element closes the receiving space.

10. The optical element driving mechanism according to claim 9, wherein: The base also has a plurality of positioning structures, which are respectively arranged at a plurality of corners of the base; The driving coil is wound around a plurality of the positioning structures to be fixedly arranged on the base; The base also has a side structure connected between the two corresponding positioning structures; The side structure has a hollow space, and a portion of the driving coil is located in the hollow space; A portion of the driving coil is exposed from the hollow space; When viewed along a direction perpendicular to the optical axis, the side structure has a first outer side surface and a first inner side surface; The first outer side faces toward the housing and directly contacts the housing; The first inner side faces the first magnetic element; The driving coil has a second outer side surface and a second inner side surface; The second outer side faces toward the housing; The second inner side faces the first magnetic element; A first distance is formed between the first outer side surface and the second outer side surface in the first axial direction; The first distance is greater than zero; A second distance is formed between the first outer side surface and the first inner side surface in the first axial direction; A third distance is formed between the second outer side surface and the second inner side surface in the first axial direction; The second distance is greater than the third distance; The optical element driving mechanism further includes a first buffer element disposed between the first movable portion and the second movable portion; The optical element driving mechanism further includes a second buffer element disposed between the second movable portion and the base.

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