Optical element driving mechanism

Abstract

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a movable part, a fixed part and a driving assembly, the movable part is used for being connected with an optical element, and the movable part can move relative to the fixed part. The driving assembly is used for driving the movable part to move relative to the fixed part.

Description

TECHNICAL FIELD

[0001] The present utility model relates to an optical element driving mechanism. More particularly, the present utility model relates to an optical element driving mechanism for driving an optical element to move. BACKGROUND

[0002] With the development of technology, many electronic devices (such as tablet computers and smart phones) nowadays have the function of taking pictures or recording videos. These electronic devices are increasingly popular and are developing towards the direction of convenience and thinness, providing users with more choices. SUMMARY

[0003] The present utility model aims to provide an optical element driving mechanism to solve at least one of the above problems.

[0004] The present utility model provides an optical element driving mechanism, comprising a movable part, a fixed part and a driving assembly. The movable part is used to connect an optical element, and the movable part can move relative to the fixed part. The driving assembly is used to drive the movable part to move relative to the fixed part.

[0005] In some embodiments, when viewed along a main axis, the fixed part comprises a polygonal profile, and the polygonal profile comprises a first side and a second side, the first side extends along a first axis, and the second side extends along a second axis. The first axis and the second axis are not parallel. The maximum size of the first side in the first axis is different from the maximum size of the second side in the second axis. The driving assembly is located on the first side.

[0006] In some embodiments, the aforementioned driving assembly comprises a coil, a first magnetic element and a second magnetic element. The first magnetic element corresponds to the coil, and the second magnetic element is adjacent to the first magnetic element. The first magnetic element has a first surface and a second surface, the first surface faces the coil and is perpendicular to a third axis, and the second surface faces the second magnetic element and is perpendicular to a fourth axis. The second magnetic element has a third surface, the third surface faces the first magnetic element and is perpendicular to the fourth axis. When viewed along the fourth axis, at least part of the second surface does not overlap with the third surface.

[0007] In some embodiments, the aforementioned second magnetic element further has a fourth surface and a fifth surface, the fourth surface and the fifth surface are parallel to the fourth axis, the fourth surface is not parallel to the fifth surface, and the fourth surface is not perpendicular to the fifth surface.

[0008] In some embodiments, when viewed along the fourth axis, the first magnetic element has an elongated structure, and in the direction of the long axis of the elongated structure, the maximum size of the first magnetic element is different from the maximum size of the second magnetic element.

[0009] In some embodiments, the aforementioned fixed portion comprises a frame, the frame has a top wall, and a distance between the second magnetic element and the top wall is smaller than a distance between the first magnetic element and the top wall. The top wall has a first recess formed thereon, and the first recess does not overlap the second magnetic element when viewed along the fourth axis. The first recess overlaps the first magnetic element when viewed along the fourth axis.

[0010] In some embodiments, the aforementioned frame further comprises a second recess corresponding to the second magnetic element. The second recess is located at the first side when viewed along the main axis, the second recess overlaps the second magnetic element, the first recess is located at a corner of the fixed portion, the first recess is located at the first side, and the first recess is adjacent to the second recess. The first recess has a first recess surface, the first recess surface faces the first magnetic element, and a gap between the first recess surface and the first magnetic element is greater than zero.

[0011] In some embodiments, the aforementioned frame has a side wall connected to the top wall, and the optical element driving mechanism further comprises a connecting element, the first magnetic element is connected to the side wall via the connecting element. The second recess has a second recess surface, the second recess surface faces the second magnetic element, and the connecting element directly contacts the second recess surface. The first recess surface is connected to the side wall. The second magnetic element is connected to the side wall via the connecting element.

[0012] In some embodiments, the maximum dimension of the first magnetic element in the third axis is the same as the maximum dimension of the second magnetic element in the third axis when viewed along the fourth axis, and the first magnetic element and the second magnetic element are both disposed at the first side.

[0013] In some embodiments, the aforementioned optical element driving mechanism further comprises a damping assembly for damping vibration of the movable portion, and the damping assembly comprises a first arrangement portion and a damping element. The first arrangement portion is located on the movable portion, wherein the first arrangement portion extends along an extension direction and protrudes from the movable portion when viewed along a fifth axis. The damping element is disposed on a first side of the first arrangement portion. The first side is not perpendicular to the extension direction when viewed along the fifth axis. The first arrangement portion further comprises a second side adjacent to the first side and not parallel to the first side. The first arrangement portion further comprises a third side adjacent to the second side and not parallel to the second side. The first side and the third side are respectively located at opposite sides of the first arrangement portion when viewed along the fifth axis. The damping element does not contact the third side. The first side and the third side are parallel to each other.

[0014] In some embodiments, the aforementioned shock absorbing assembly further comprises a second arrangement portion disposed on the fixed portion and having a fourth side, the shock absorbing element directly contacts the fourth side. The fourth side faces the first side. The first arrangement portion and the second arrangement portion are movable relative to each other. When viewed along the fifth axial direction, the fourth side is not perpendicular to the extending direction. The second arrangement portion further comprises a fifth side, and when viewed along the fifth axial direction, the fourth side and the fifth side are located at opposite sides of the second arrangement portion.

[0015] In some embodiments, the aforementioned third axial direction is parallel to the second axial direction.

[0016] In some embodiments, the aforementioned optical element driving mechanism further comprises a resilient element, and the resilient element comprises a movable portion fixed segment, a fixed portion fixed segment, and a string segment. The movable portion fixed segment is fixed on the movable portion. The fixed portion fixed segment is fixed on the fixed portion. The string segment connects the movable portion fixed segment and the fixed portion fixed segment, and the fixed portion fixed segment is located at the second side.

[0017] In some embodiments, the aforementioned fixed portion comprises an outer frame and a base, the outer frame comprises a side wall, the base comprises a side column, and the side wall and the side column are connected to each other, wherein the movable portion comprises a winding column, the end of the coil is wound on the winding column, an opening is formed on the side column, and the winding column is accommodated in the opening.

[0018] In some embodiments, the aforementioned fixed portion comprises a base, the base comprises a bottom plate and a side column, the side column is connected to the bottom plate, and a through hole is formed on the side column, wherein the aforementioned optical element driving mechanism further comprises a sensor accommodated in the through hole.

[0019] In some embodiments, the aforementioned fixed portion comprises a base, the base comprises a bottom plate and a side column, the side column is connected to the bottom plate, and a recess structure is formed on the surface of the side column away from the movable portion, wherein the aforementioned optical element driving mechanism further comprises a sensor disposed on the side column and located in the recess structure.

[0020] In some embodiments, the aforementioned fixed portion comprises a base, the base comprises a bottom plate and a side column, the side column is connected to the bottom plate, and a hole is formed on the bottom plate, wherein the aforementioned optical element driving mechanism further comprises a sensor accommodated in the hole. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic view of an electronic device with an optical element driving mechanism according to an embodiment of the present application.

[0022] Figure 2 FIG. 2 is a schematic view of an optical element driving mechanism according to an embodiment of the present application.

[0023] Figure 3 FIG. 3 is an exploded view of an optical element driving mechanism according to an embodiment of the present application.

[0024] Figure 4A This is a schematic diagram of an elastic element in one embodiment of the present invention.

[0025] Figure 4B This is a schematic diagram of another elastic element in one embodiment of the present invention.

[0026] Figure 5 for Figure 2 A cross-sectional view along the AA direction.

[0027] Figure 6 for Figure 2 A cross-sectional view along the BB direction.

[0028] Figure 7 for Figure 2 A cross-sectional view along the CC direction.

[0029] Figure 8 This is a schematic diagram of the base and sensing component in another embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of the base and sensing component in another embodiment of the present invention.

[0031] The attached figures are labeled as follows:

[0032] 10: Optical element driving mechanism

[0033] 20: Electronic devices

[0034] 30: Optical components

[0035] 100: Fixing part

[0036] 101: First side

[0037] 102: Second side

[0038] 110: Outer frame

[0039] 111: Top Wall

[0040] 112: Sidewall

[0041] 120: Base

[0042] 121: Base Plate

[0043] 122: Side Post

[0044] 123: Opening

[0045] 124: Perforation

[0046] 125: Depressed structure

[0047] 126: hole

[0048] 200: movable part

[0049] 210: winding post

[0050] 300: elastic element

[0051] 310: movable part fixing section

[0052] 320: fixed part fixing section

[0053] 330: string section

[0054] 400: elastic element

[0055] 410: movable part fixing section

[0056] 420: fixed part fixing section

[0057] 430: string section

[0058] 500: driving assembly

[0059] 510: first magnetic element

[0060] 511: first surface

[0061] 512: second surface

[0062] 520: second magnetic element

[0063] 521: third surface

[0064] 522: fourth surface

[0065] 523: fifth surface

[0066] 530: coil

[0067] 600: sensing assembly

[0068] 610: circuit board

[0069] 620: sensor

[0070] 630: sensed object

[0071] 700: connecting element

[0072] 800: shock absorbing assembly

[0073] 810: first setting part

[0074] 811: first side surface

[0075] 812: second side surface

[0076] 813: third side surface

[0077] 820: second setting portion

[0078] 821: fourth side surface

[0079] 822: fifth side surface

[0080] 830: shock absorbing element

[0081] 900: connecting element

[0082] AX: main shaft

[0083] D1: maximum dimension of the first side surface in the first axial direction

[0084] D2: maximum dimension of the second side surface in the second axial direction

[0085] P1: first recess

[0086] P11: first recess surface

[0087] P2: second recess

[0088] P21: second recess surface

[0089] R1: first axial direction

[0090] R2: second axial direction

[0091] R3: third axial direction

[0092] R4: fourth axial direction

[0093] R5: fifth axial direction DETAILED DESCRIPTION

[0094] The optical element driving mechanism of the embodiments of the present application is described below. However, it can be easily understood that the embodiments of the present application provide many suitable inventive concepts and can be implemented in a wide variety of specific contexts. The specific embodiments disclosed are merely for illustration to use the present application in a specific method, and are not intended to limit the scope of the present application.

[0095] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0096] First, refer to Figure 1The optical element driving mechanism 10 of one embodiment of the present utility model can be installed in an electronic device 20 and used to carry and drive an optical element 30, so that the optical element 30 can move relative to a photosensitive element (not shown) in the electronic device 20, thereby achieving the purposes of focusing, zooming and / or optical image stabilization (OIS). The aforementioned electronic device 20 may, for example, be a smart phone, a tablet computer or a digital camera, and the aforementioned optical element 30 may, for example, be a lens having multiple lenses, but is not limited thereto.

[0097] Figure 2 The optical element driving mechanism 10 is shown in a schematic view, and Figure 3 The optical element driving mechanism 10 is shown in an exploded view. As shown in Figure 2 and Figure 3 The optical element driving mechanism 10 mainly includes a fixed part 100, a movable part 200, an elastic element 300, an elastic element 400, a driving assembly 500 and a sensing assembly 600.

[0098] The fixed part 100 can include an outer frame 110 and a base 120, which can be engaged with each other to form a hollow box. The movable part 200, the elastic element 300, the elastic element 400, the driving assembly 500 and the sensing assembly 600 can be accommodated in the hollow box to protect the aforementioned elements.

[0099] When viewed from the main axis AX (i.e. the optical axis of the optical element 30) of the optical element driving mechanism 10, the fixed part 100 can have a polygonal profile (e.g. a rectangular profile) and the polygonal profile can have a first side 101 and a second side 102. The first side 101 extends along a first axial direction R1, the second side 102 extends along a second axial direction R2, the first axial direction R1 and the second axial direction R2 are not parallel, and the maximum dimension D1 of the first side 101 in the first axial direction R1 is different from the maximum dimension D2 of the second side 102 in the second axial direction R2. In this embodiment, the first axial direction R1 and the second axial direction R2 are perpendicular to each other, and the maximum dimension D1 of the first side 101 in the first axial direction R1 is less than the maximum dimension D2 of the second side 102 in the second axial direction R2.

[0100] The outer frame 110 of the fixed part 100 includes a top wall 111 and multiple side walls 112, which can be connected with the top wall 111 and extend towards the base 120. At least one first recess P1 and at least one second recess P2 can be formed on the top wall 111. The first recess P1 and the second recess P2 can be adjacent to each other and both located at the first side 101, wherein when viewed along the main axis AX, the first recess P1 can be located at a corner of the polygonal profile, and the second recess P2 can be located between the corners of the polygonal profile.

[0101] The base 120 of the fixed portion 100 includes a bottom plate 121 and a plurality of side posts 122, which are connected to the bottom plate 121 and extend toward the top wall 111 of the outer frame 110. When assembling the fixed portion 100, the user can use adhesive elements (e.g., glue or tape) to adhere the side wall 112 and the side posts 122, so that the outer frame 110 and the base 120 are fixed to each other.

[0102] The movable portion 200 can be used to connect the optical element 30 and can be movably connected to the fixed portion 100. In detail, the movable portion 200 can be suspended in the hollow box by the elastic element 300 and the elastic element 400.

[0103] As shown in Figure 4A , the elastic element 300 can include at least one movable portion fixing segment 310, at least one fixed portion fixing segment 320, and at least one string segment 330. The movable portion fixing segment 310 can be fixed to the upper surface of the movable portion 200, the fixed portion fixing segment 320 can be fixed to the fixed portion 100 (e.g., to the side posts 122), and the string segment 330 can be disposed between the movable portion fixing segment 310 and the fixed portion fixing segment 320 to connect the two.

[0104] As shown in Figure 4B , similarly, the elastic element 400 can include at least one movable portion fixing segment 410, at least one fixed portion fixing segment 420, and at least one string segment 430. The movable portion fixing segment 410 can be fixed to the lower surface of the movable portion 200, the fixed portion fixing segment 420 can be fixed to the fixed portion 100 (e.g., to the bottom plate 121), and the string segment 430 can be disposed between the movable portion fixing segment 410 and the fixed portion fixing segment 420 to connect the two.

[0105] In particular, in the present embodiment, the fixed portion fixing segment 320 of the elastic element 300 and the fixed portion fixing segment 420 of the elastic element 400 are located at the second side edge 102 (i.e., the long side edge of the optical element driving mechanism 10) and are not disposed at the first side edge 101 (i.e., the short side edge of the optical element driving mechanism 10).

[0106] Figure 5 For Figure 2 , the cross-sectional view along the A-A direction, and Figure 6 , the cross-sectional view along the B-B direction. As shown in Figure 2 , Figure 2-3 , Figure 5-6 , the driving assembly 500 can include at least one first magnetic element 510, at least one second magnetic element 520, and at least one coil 530.

[0107] A first magnetic element 510 and a second magnetic element 520 are stacked along the main axis AX at the first side 101, and a coil 530 is disposed on the movable part 200. The positions of the first magnetic element 510 and the second magnetic element 520 correspond to the position of the coil 530. The first magnetic element 510 generally has a cuboid structure and may include a first surface 511 and a second surface 512, wherein the first surface 511 faces the coil 530 and is perpendicular to a third axis R3, and the second surface 512 faces the second magnetic element 520 and is perpendicular to a fourth axis R4. In this embodiment, the first surface 511 and the second surface 512 are connected to each other and are perpendicular to each other, so the third axis R3 may be perpendicular to the fourth axis R4. In addition, in this embodiment, the fourth axis R4 is more parallel to the main axis AX of the optical element driving mechanism 10.

[0108] like Figure 5 As shown, the first recessed portion P1 of the fixing portion 100 may have a first recessed surface P11 connected to the sidewall 112 and facing the first magnetic element 510. When the first magnetic element 510 is disposed in the hollow box of the fixing portion 100, viewed along the fourth axis R4, the first recessed surface P11 may overlap with the first magnetic element 510. It should be noted that the first recessed surface P11 does not contact the first magnetic element 510; in other words, there may be a gap greater than zero between the first recessed surface P11 and the first magnetic element 510.

[0109] The second magnetic element 520 is adjacent to the first magnetic element 510 and is disposed between the first magnetic element 510 and the top wall 111 of the outer frame 110. Therefore, the distance between the second magnetic element 520 and the top wall 111 will be smaller than the distance between the first magnetic element 510 and the top wall 111. The shape of the second magnetic element 520 can match the first recess P1. Therefore, when viewed along the fourth axis R4, the first recess P1 and the second magnetic element 520 will not overlap.

[0110] The second magnetic element 520 may include a third surface 521, a fourth surface 522, and a fifth surface 523. The third surface 521 faces the first magnetic element 510 and is perpendicular to the fourth axis R4. The fourth surface 522 and the fifth surface 523 are connected and parallel to the fourth axis R4. In particular, the fourth surface 522 and the fifth surface 523 may form an obtuse angle, so the fourth surface 522 is neither parallel nor perpendicular to the fifth surface 523.

[0111] In the present embodiment, the first magnetic element 510 has a substantially elongated structure and the second magnetic element 520 has a substantially trapezoidal structure when viewed along the fourth axis R4, and the maximum dimension of the first magnetic element 510 is greater than that of the second magnetic element 520 in the direction of the long axis of the elongated structure of the first magnetic element 510. Therefore, at least part of the second surface 512 will not overlap the third surface 521.

[0112] The position of the second recess P2 can correspond to the position of the second magnetic element 520, so that the second recess P2 will overlap the second magnetic element 520 when viewed along the fourth axis R4.

[0113] When the user installs the first magnetic element 510 and the second magnetic element 520 on the fixed portion 100, the connecting elements can be used for fixation. For example, the connecting elements 700 can be arranged between the first magnetic element 510 and the side wall 112 of the outer frame 110 and between the second magnetic element 520 and the side wall 112 of the outer frame 110, and contact the first magnetic element 510, the second magnetic element 520 and the side wall 112 to fix the first magnetic element 510 and the second magnetic element 520 on the side wall 112. In the present embodiment, the connecting elements 700 can further extend between the second magnetic element 520 and the second recess surface P21 of the second recess P2 (the second recess surface P21 is the surface of the second recess P2 facing the second magnetic element 520), and contact the second magnetic element 520 and the second recess surface P21, so that the first magnetic element 510 and the second magnetic element 520 are more stably fixed on the outer frame 110.

[0114] In the present embodiment, the first magnetic element 510 can be further fixed on the base 120 of the fixed portion 100 via the connecting elements 900. The connecting elements 900 can be arranged on the side of the first magnetic element 510 and contact the first magnetic element 510 and the base 120.

[0115] The aforementioned connecting elements 700 and 900 can be adhesives or tapes, but are not limited thereto. For example, in the present embodiment, the connecting elements 700 can be heat-hardened glue, and the connecting elements 900 can be heat-hardened and light-hardened glue.

[0116] When current flows into the coil 530, the electromagnetic interaction between the coil 530 and the first magnetic element 510 and the electromagnetic interaction between the coil 530 and the second magnetic element 520 can provide driving force to the movable portion 200, so that the movable portion 200 and the optical element 30 arranged thereon move relative to the fixed portion 100 along the main axis AX, thus achieving the purpose of zooming and / or focusing.

[0117] As Figure 6As shown, in the present embodiment, the maximum dimension of the first magnetic element 510 on the third axial direction R3 is substantially the same as the maximum dimension of the second magnetic element 520 on the third axial direction R3 when viewed along the fourth axial direction R4, so that the driving assembly 500 can provide uniform driving force to the movable part 200. The magnetic pole of the sixth surface 524 of the second magnetic element 520 facing the coil 530 can be opposite to the magnetic pole of the first surface 511 of the first magnetic element 510, so that the driving force of the driving assembly 500 can be enhanced.

[0118] Figure 7 For Figure 2 the cross-sectional view along the C-C direction. As Figure 7 shown, in the present embodiment, the end portion of the coil 530 can be wound around the winding post 210 of the movable part 200, and the side post 122 of the base 120 can be formed with an opening 123 corresponding to the winding post 210, and the winding post 210 can be accommodated in the opening 123, so as to facilitate the miniaturization of the optical element driving mechanism 10.

[0119] In addition, as Figure 7 shown, in the present embodiment, the optical element driving mechanism 10 can further include a damping assembly 800. The damping assembly 800 can include at least a first setting part 810, at least a second setting part 820, and at least a damping element 830.

[0120] The first setting part 810 is connected to the movable part 200, and when viewed along the fifth axial direction R5, the first setting part 810 extends along an extension direction (X-axis direction in the figure) and protrudes from the movable part 200, and the first setting part 810 has a first side surface 811, a second side surface 812, and a third side surface 813. The first side surface 811 is not perpendicular to the extension direction, the second side surface 812 is adjacent to the first side surface 811 and is not parallel to the first side surface 811, and the third side surface 813 is adjacent to the second side surface 812 and is not parallel to the second side surface 812. When viewed along the fifth axial direction R5, the first side surface 811 and the third side surface 813 are located on opposite sides of the first setting part 810, respectively, and the first side surface 811 and the third side surface 813 are parallel to each other. The first setting part 810 and the movable part 200 can be integrally formed, but are not limited thereto.

[0121] The second setting portion 820 is connected to the base 120 and has a fourth side 821 and a fifth side 822. The fourth side 821 faces the first side 811, and the fourth side 821 is not perpendicular to the extension direction of the first setting portion 810 when viewed along the fifth axis R5. The fourth side 821 and the fifth side 822 are located on opposite sides of the second setting portion 820, respectively. Since the first setting portion 810 and the second setting portion 820 are arranged on the movable portion 200 and the fixed portion 100, respectively, the first setting portion 810 moves relative to the second setting portion 820 when the movable portion 200 moves relative to the fixed portion 100. The second setting portion 820 and the base 120 of the fixed portion 100 can be integrally formed, but are not limited thereto.

[0122] The shock-absorbing element 830 is arranged between the first setting portion 810 and the second setting portion 820 and contacts the first side 811 of the first setting portion 810 and the fourth side 821 of the second setting portion 820. For example, the shock-absorbing element 830 can include a gel, and thus the shock-absorbing element 830 can reduce the shock generated when the movable portion 200 moves relative to the fixed portion 100. In the present embodiment, the shock-absorbing element 830 will not contact the second side 812, the third side 813, and the fifth side 822 to avoid affecting the movement of the movable portion 200.

[0123] Referring to Figure 3 and Figure 7 , the sensing assembly 600 can include a circuit board 610, a sensor 620, and a sensing object 630. The circuit board 610 is arranged on the side column 122 of the base 120, the sensor 620 is arranged on the circuit board 610, and the sensing object 630 is arranged on the movable portion 200 and corresponds to the aforementioned sensor 620. The sensor 620 can sense the movement of the sensing object 630, and thus the displacement of the movable portion 200 relative to the fixed portion 100 can be obtained.

[0124] For example, the sensor 620 can be a Hall sensor, a magnetoresistance effect sensor (MR sensor), a giant magnetoresistance effect sensor (GMR sensor), a tunneling magnetoresistance effect sensor (TMR sensor), or a fluxgate, and the sensing object 630 can be a magnet, but are not limited thereto.

[0125] In the embodiment, a through hole 124 can be formed on the side column 122, and the sensor 620 can be accommodated in the through hole 124. In this way, the optical element driving mechanism 10 can be miniaturized, and the sensing accuracy of the sensing assembly 600 can be improved.

[0126] Referring to Figure 8 In another embodiment of the present application, the sensing assembly 600 can omit the circuit board 610, and a recess structure 125 can be formed on the surface of the side column 122 facing away from the movable part 200. The sensor 620 can be accommodated in the recess structure 125, and can be fixed on the side column 122 by a suitable method (for example, by surface mount technology (SMT)) and electrically connected to the circuit buried in the base 120. In this way, the optical element driving mechanism 10 can be further miniaturized.

[0127] Referring to Figure 9 In another embodiment of the present application, the sensing assembly 600 can omit the circuit board 610, and a recess structure 125 can be formed on the surface of the side column 122 facing away from the movable part 200. The sensor 620 can be accommodated in the recess structure 125, and can be fixed on the side column 122 by a suitable method (for example, by surface mount technology (SMT)) and electrically connected to the circuit buried in the base 120. In this way, the optical element driving mechanism 10 can be further miniaturized.

[0128] In summary, the present application provides an optical element driving mechanism, which includes a movable part, a fixed part, and a driving assembly. The movable part is used to connect an optical element, and the movable part can move relative to the fixed part. The driving assembly is used to drive the movable part to move relative to the fixed part.

[0129] Although the embodiments of the present application and their advantages have been disclosed, it should be understood that those skilled in the art, without departing from the spirit and scope of the present application, can make changes, substitutions and modifications. In addition, the scope of protection of the present application is not limited to the specific embodiments described in the specification, and any person skilled in the art can understand the current or future developed processes, machines, manufacturing, material compositions, devices, methods and steps from the disclosure of the present application, as long as they can substantially the same function or obtain substantially the same results as in the embodiments described herein. Therefore, the scope of protection of the present application includes the above processes, machines, manufacturing, material compositions, devices, methods and steps. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present application also includes the combination of each claim and embodiment.

[0130] Although the utility model discloses the above with preceding several preferred embodiments, however, it is not used to limit the utility model. The utility model belongs to the technical field personnel, when can do a little change and adornment in the spirit and range of the utility model without departing from the utility model. Therefore the protection scope of the utility model is when the appended claims are defined. In addition, each claim constitutes an independent embodiment, and the combination of various claims and embodiments is within the scope of the utility model.

Claims

1. An optical element driving mechanism characterized by comprising: The optical element driving mechanism comprises: a movable part for connecting an optical element; a fixed part, wherein the movable part is movable relative to the fixed part; and a driving assembly for driving the movable part to move relative to the fixed part, comprising: a coil; a first magnetic element corresponding to the coil; and a second magnetic element adjacent to the first magnetic element, wherein the first magnetic element has a first surface facing the coil, and the first surface is perpendicular to a third axial direction, the first magnetic element also has a second surface facing the second magnetic element, and the second surface is perpendicular to a fourth axial direction, the second magnetic element has a third surface facing the first magnetic element, and the third surface is perpendicular to the fourth axial direction, at least part of the second surface overlaps with the third surface when viewed along the fourth axial direction, and at least part of the second surface does not overlap with the third surface.

2. The optical element drive mechanism according to claim 1, wherein When viewed along a main axis, the fixed part comprises a polygonal contour, and the polygonal contour comprises: a first side edge extending along a first axial direction; and a second side edge extending along a second axial direction, wherein the first axial direction and the second axial direction are not parallel, the maximum dimension of the first side edge in the first axial direction is different from the maximum dimension of the second side edge in the second axial direction, the driving assembly is located at the first side edge.

3. The optical element drive mechanism according to claim 1, wherein The second magnetic element also has a fourth surface and a fifth surface, the fourth surface and the fifth surface are parallel to the fourth axial direction, the fourth surface is not parallel to the fifth surface, and the fourth surface is not perpendicular to the fifth surface.

4. The optical element drive mechanism according to claim 1, wherein When viewed along the fourth axial direction, the first magnetic element has an elongated structure, and in the direction of the long axis of the elongated structure, the maximum dimension of the first magnetic element is different from the maximum dimension of the second magnetic element.

5. The optical element drive mechanism according to claim 2, wherein The fixed part comprises an outer frame having a top wall, and the distance between the second magnetic element and the top wall is less than the distance between the first magnetic element and the top wall, a first recess is formed on the top wall, and the first recess does not overlap with the second magnetic element when viewed along the fourth axial direction, the first recess overlaps with the first magnetic element when viewed along the fourth axial direction.

6. The optical element drive mechanism according to claim 5, wherein The outer frame further comprises a second recess corresponding to the second magnetic element, when viewed along the main axis, the second recess is located at the first side edge, when viewed along the main axis, the second recess overlaps with the second magnetic element, when viewed along the main axis, the first recess is located at a corner of the fixed part, when viewed along the main axis, the first recess is located at the first side edge, when viewed along the main axis, the first recess is adjacent to the second recess, the first recess has a first recess surface facing the first magnetic element, there is a gap greater than zero between the first recess surface and the first magnetic element.

7. The optical element drive mechanism according to claim 6, wherein The outer frame further has a side wall connected to the top wall, and the optical element driving mechanism further comprises a connecting element, the first magnetic element is connected to the side wall via the connecting element, The second recess has a second recess surface facing the second magnetic element, the connecting element directly contacts the second recess surface, The first recess surface connects the side wall, The second magnetic element is connected to the side wall via the connecting element.

8. The optical element drive mechanism according to claim 2, wherein When viewed along the fourth axial direction, the maximum dimension of the first magnetic element in the third axial direction is the same as the maximum dimension of the second magnetic element in the third axial direction, and the first magnetic element and the second magnetic element are both disposed on the first side edge.

9. The optical element drive mechanism according to claim 2, wherein The optical element driving mechanism further comprises a damping assembly for damping vibration of the movable portion, and the damping assembly comprises: a first setting portion disposed on the movable portion, wherein when viewed along a fifth axial direction, the first setting portion extends along an extension direction and protrudes from the movable portion; and a damping element disposed on a first side surface of the first setting portion, wherein when viewed along the fifth axial direction, the first side surface is not perpendicular to the extension direction, the first setting portion further comprises a second side surface adjacent to the first side surface and not parallel to the first side surface, the first setting portion further comprises a third side surface adjacent to the second side surface and not parallel to the second side surface, when viewed along the fifth axial direction, the first side surface and the third side surface are respectively located on opposite sides of the first setting portion, the damping element does not contact the third side surface, the first side surface and the third side surface are parallel to each other.

10. The optical element drive mechanism according to claim 9, wherein The damping assembly further comprises a second setting portion disposed on the fixed portion and having a fourth side surface, the damping element directly contacts the fourth side surface, the fourth side surface faces the first side surface, the first setting portion and the second setting portion can move relative to each other, when viewed along the fifth axial direction, the fourth side surface is not perpendicular to the extension direction, the second setting portion further comprises a fifth side surface, and when viewed along the fifth axial direction, the fourth side surface and the fifth side surface are located on opposite sides of the second setting portion.

11. The optical element drive mechanism according to claim 2, wherein The third axial direction is parallel to the second axial direction.

12. The optical element drive mechanism according to claim 2, wherein The optical element driving mechanism further comprises a resilient element, and the resilient element comprises: a movable portion fixed segment fixed to the movable portion; a fixed portion fixed segment fixed to the fixed portion; and a string segment connecting the movable portion fixed segment and the fixed portion fixed segment, wherein the fixed portion fixed segment is located on the second side edge.

13. The optical element drive mechanism according to claim 2, wherein The fixed portion comprises a frame and a base, the frame comprises a side wall, the base comprises a side column, and the side wall and the side column are connected to each other, wherein the movable portion comprises a winding column, the ends of the coil are wound on the winding column, an opening is formed on the side column, and the winding column is accommodated in the opening.

14. The optical element drive mechanism according to claim 2, wherein The fixed portion comprises a base, the base comprises a bottom plate and a side column, the side column connects the bottom plate, and a through hole is formed on the side column, wherein the optical element driving mechanism further comprises a sensor accommodated in the through hole.

15. The optical element drive mechanism according to claim 2, wherein The fixed portion comprises a base, the base comprises a bottom plate and a side column, the side column connects the bottom plate, and a recess structure is formed on the surface of the side column facing away from the movable portion, wherein the optical element driving mechanism further comprises a sensor disposed on the side column and located in the recess structure.

16. The optical element drive mechanism according to Claim 2, wherein The fixing portion includes a base including a bottom plate and a side column connected to the bottom plate, and a hole is formed in the bottom plate, wherein the optical element driving mechanism further includes a sensor accommodated in the hole.

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