Optical element driving mechanism

Abstract

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a fixed part, a first movable part and a driving assembly. The first movable part is used for being connected with an optical element with an optical axis, and the first movable part can move relative to the fixed part. The driving assembly is used for driving the first movable part to move. When observed along the optical axis, the optical element driving mechanism is polygonal and comprises a first side, a second side, a third side and a fourth side, the third side is opposite to the first side, and the fourth side is opposite to the second side. Under the condition that the third side is not provided with any magnetic element, coil and coil assembly, the optical element driving mechanism can still effectively achieve the automatic focusing function and the optical anti-shake function.

Description

TECHNICAL FIELD

[0001] The utility model relates to an optical element driving mechanism. BACKGROUND

[0002] With the development of science and technology, optical elements and optical element driving mechanisms capable of driving optical elements are gradually miniaturized. Through the combination of optical elements, optical element driving mechanisms, and photosensitive elements, many electronic devices (for example, tablet computers, smart phones) have the functions of taking photographs and recording videos.

[0003] When a user uses an electronic device, shaking may occur, causing the photographed photos or videos to be blurred. However, as the requirement for image quality is increasingly high, optical element driving mechanisms capable of correcting shaking are thus generated.

[0004] An optical element includes an optical axis passing through the center thereof. The optical element driving mechanism can drive the optical element to move in a direction parallel to the optical axis to focus on a subject, achieving auto focus (AF). In addition, the optical element driving mechanism can also drive the optical element to move in a direction perpendicular to the optical axis to compensate for the shift of the image relative to the original position caused by the shaking of the user or the impact of external force, thereby achieving optical image stabilization (OIS). Through auto focus and optical image stabilization, the quality of the photographed image can be improved. SUMMARY

[0005] The utility model discloses an optical element driving mechanism to solve at least one of the above problems.

[0006] Some embodiments of the utility model provide an optical element driving mechanism. The optical element driving mechanism includes a fixed part, a first movable part, and a driving assembly. The first movable part is used to connect an optical element having an optical axis, and the first movable part can move relative to the fixed part. The driving assembly is used to drive the first movable part to move. When viewed along the optical axis, the optical element driving mechanism is a polygon, including a first side, a second side, a third side, and a fourth side, the third side is opposite to the first side, and the fourth side is opposite to the second side.

[0007] In some embodiments, the driving assembly includes a circuit element located at the first side and a first side magnetic element located at the first side. The optical element driving mechanism further includes a sensing assembly, and the sensing assembly includes a first side first sensing element. The first side first sensing element is arranged at the circuit element. When viewed along the optical axis, the circuit element is located between the first side first sensing element and the first side magnetic element.

[0008] In some embodiments, the first side first sensing element comprises a first side inner surface and a first side outer surface, the first side outer surface is located between the first side inner surface and the first side magnetic element, and the first side first sensing element further comprises an inner wafer, a shortest distance between the inner wafer and the first side outer surface is different from a shortest distance between the inner wafer and the first side inner surface when viewed along the optical axis.

[0009] In some embodiments, the optical element driving mechanism further comprises a resilient assembly electrically connected to the driving assembly, wherein the resilient assembly comprises a first side first conductive element, a first side second conductive element, a second side conductive element, and a fourth side conductive element. The first side first conductive element, the first side second conductive element, the second side conductive element, and the fourth side conductive element are all electrically connected to the circuit element. Moreover, the first side first conductive element, the first side second conductive element, the second side conductive element, and the fourth side conductive element are electrically independent from each other.

[0010] In some embodiments, the first side first conductive element comprises a first side first flexible portion, the first side second conductive element comprises a first side second flexible portion, and the first side first flexible portion and the first side second flexible portion are symmetrical.

[0011] In some embodiments, the driving assembly further comprises a second side magnetic element located at the second side, a second coil located at the second side, and a second coil assembly located at the second side, wherein a volume of the first side magnetic element is different from a volume of the second side magnetic element.

[0012] In some embodiments, the optical element driving mechanism further comprises a guiding assembly guiding the movement of the first movable portion, wherein the guiding assembly comprises a first guiding element and a second guiding element. The first guiding element extends along the optical axis and is located at a corner between the first side and the second side. The second guiding element extends along the optical axis and is located at a corner between the third side and the fourth side. A magnetic permeability of the first guiding element is different from a magnetic permeability of the second guiding element. In some embodiments, the guiding assembly further comprises a first magnetic permeable element located adjacent to the first guiding element, wherein the first magnetic permeable element is closer to the second side than to the fourth side.

[0013] In some embodiments, the optical element driving mechanism further comprises a second movable portion accommodating the first movable portion, wherein the guiding assembly further comprises a first upper stationary element contacting the second movable portion. In some embodiments, the first movable portion comprises two first contact structures and a second contact structure, the first guiding element contacts the two first contact structures, and the second guiding element contacts the second contact structure, wherein the two first contact structures at least partially overlap with each other when viewed along the optical axis.

[0014] The optical element driving mechanism can still effectively achieve the automatic focusing function and the optical anti-shake function without any magnetic element, coil or coil group arranged on one side of the optical element driving mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to make the features or advantages of the present application more obvious and easy to understand, some embodiments are described in detail below, and the accompanying drawings are described as follows. It should be noted that various features are not necessarily drawn to scale. In fact, the size of various features can be arbitrarily enlarged or reduced, and can be schematically drawn.

[0016] Figure 1 is a schematic diagram of an optical element driving mechanism and an optical element according to some embodiments.

[0017] Figure 2 is an exploded view of an optical element driving mechanism according to some embodiments.

[0018] Figure 3A is a perspective view of a base according to some embodiments.

[0019] Figure 3B is a schematic diagram of an embedded component embedded in the base according to some embodiments.

[0020] Figure 4A and Figure 4B is a perspective view of the first movable part from different angles according to some embodiments.

[0021] Figure 5A is a perspective view of the second movable part according to some embodiments.

[0022] Figure 5B is a bottom view of the second movable part according to some embodiments.

[0023] Figure 6 is a top view of the elastic component according to some embodiments.

[0024] Figure 7A and Figure 7B is a schematic diagram of the first movable part, the driving component, the sensing component and the guiding component from different angles according to some embodiments.

[0025] Figure 8 and Figure 9 is a perspective view of an optical element driving mechanism omitting some components according to some embodiments.

[0026] Figure 10is a top view of an optical element driving mechanism omitting some elements according to some embodiments.

[0027] Figure 11 is a side view of an optical element driving mechanism omitting some elements according to some embodiments.

[0028] Figure 12 and Figure 13 is a perspective view of an optical element driving mechanism omitting some elements according to some embodiments.

[0029] Figure 14 is a top view of an optical element driving mechanism omitting some elements according to some embodiments.

[0030] Figure 15 is a side view of an optical element driving mechanism omitting some elements according to some embodiments.

[0031] Figure 16 is a schematic view of an optical element driving mechanism omitting some elements according to some embodiments.

[0032] Figure 17 is a top view of an optical element driving mechanism omitting some elements according to some embodiments.

[0033] The reference signs are as follows:

[0034] 100: optical element driving mechanism

[0035] 200: fixed part

[0036] 210: housing

[0037] 211: housing opening

[0038] 212: top wall

[0039] 213: side wall

[0040] 220: base

[0041] 221: base opening

[0042] 222: base surface

[0043] 223: recessed structure

[0044] 224: protruding column

[0045] 225: first positioning element

[0046] 226: second positioning element

[0047] 227: embedded component

[0048] 300: first movable part

[0049] 310: first movable portion opening

[0050] 320: upper stop portion

[0051] 330: protruding portion

[0052] 340: receiving structure

[0053] 350: first contact structure

[0054] 360: second contact structure

[0055] 370: second side protrusion

[0056] 380: fourth side protrusion

[0057] 400: second movable portion

[0058] 410: second movable portion opening

[0059] 420: first blocking portion

[0060] 430: second blocking portion

[0061] 440: first side recess

[0062] 450: second side recess

[0063] 460: fourth side recess

[0064] 500: elastic assembly

[0065] 510: first elastic element

[0066] 511: first side first conductive element

[0067] 512: first side second conductive element

[0068] 513: second side conductive element

[0069] 514: fourth side conductive element

[0070] 520: second elastic element

[0071] 600: driving assembly

[0072] 610: circuit element

[0073] 620: first side magnetic element

[0074] 630: first side coil

[0075] 640: second side magnetic element

[0076] 650: second side coil

[0077] 660: second side coil group

[0078] 670: fourth side magnetic element

[0079] 680: fourth side coil

[0080] 690: fourth side coil group

[0081] 700: sensing assembly

[0082] 710: first side first sensing element

[0083] 711: inner side surface of first side first sensing element

[0084] 712: outer side surface of first side first sensing element

[0085] 720: first side second sensing element

[0086] 730: second side sensing element

[0087] 800: guiding assembly

[0088] 810: first guiding element

[0089] 820: first upper fixing element

[0090] 830: first lower fixing element

[0091] 840: first magnetic element

[0092] 850: first magnetic conducting element

[0093] 860: second guiding element

[0094] 870: second upper fixing element

[0095] 880: second lower fixing element

[0096] 890: second magnetic element

[0097] 2271: auto focus signal transmission unit

[0098] 5111: first side first flexible portion

[0099] 5121: first side second flexible portion

[0100] 5131: second side flexible portion

[0101] 5141: fourth side flexible portion

[0102] O: optical axis

[0103] OE: optical element Detailed Implementation

[0104] This specification provides many different embodiments or examples to implement different features of the present invention. If this specification describes a first feature being formed "on" or "above" a second feature, it means that it may include embodiments in which the first feature and the second feature are in direct contact, or embodiments in which an additional feature is formed between the first feature and the second feature, so that the first feature and the second feature are not in direct contact.

[0105] Furthermore, in this specification, relative spatial terms may be used to describe the arrangement of the various features. These relative spatial terms are used to facilitate the description of the positional relationship of one feature relative to other features in the accompanying drawings. In addition to the orientations shown in the drawings, these spatial terms are intended to encompass different orientations of the device in use or operation. The device may be rotated to different orientations (90 degrees or other orientations), and the relative spatial terms used herein can be interpreted in the same way. For example, if the drawings are flipped so that the device is upside down, the feature "above" will become the feature "below".

[0106] In this specification, terms such as "comprising" and "having" are open-ended terms and should therefore be interpreted as "containing but not limited to...". Thus, the terms "comprising" and "having" specify the presence of corresponding features, areas, steps, operations, and / or elements, but do not exclude the presence of one or more corresponding features, areas, steps, operations, and / or elements.

[0107] The ordinal numbers in the specification and claims, such as "first," "second," etc., do not have a sequential relationship; they are only used to distinguish two different features with the same name. Therefore, the first feature referred to in the specification may be called the second feature in the claims. Furthermore, similar and / or corresponding symbols or letters may be used in different embodiments of this utility model. The use of these similar and / or corresponding symbols or letters is only for the purpose of simply and clearly describing some embodiments of this utility model and does not represent any association between the different embodiments and / or configurations discussed.

[0108] Please refer to this first. Figure 1 as well as Figure 2 . Figure 1 This is a schematic diagram of an optical element drive mechanism 100 and an optical element OE according to some embodiments. Figure 2is an exploded view of an optical element driving mechanism 100 according to some embodiments. The optical element OE has an optical axis O. The optical axis O is a virtual axis passing through the center of the optical element OE. The optical element OE can be a lens, for example. The optical element OE can be made of plastic or glass. The optical element OE can be circular or other shapes. The optical element OE and the optical element driving mechanism 100 can be mounted on an electronic device for a user to take images.

[0109] For convenience of explanation, four sides of the optical element driving mechanism 100 are defined as a first side 1001, a second side 1002, a third side 1003, and a fourth side 1004. The first side 1001 is opposite to the third side 1003, and the second side 1002 is opposite to the fourth side 1004. The first side 1001 is substantially parallel to the third side 1003, and the second side 1002 is substantially parallel to the fourth side 1004. The first side 1001, the second side 1002, the third side 1003, and the fourth side 1004 are substantially perpendicular to the optical axis O. When viewed along the optical axis O, the first side 1001 and the third side 1003 are parallel to and extend along the X-axis. When viewed along the optical axis O, the second side 1002 and the fourth side 1004 are parallel to and extend along the Y-axis. The coordinate axes in the figures are for reference only and are not intended to be limiting.

[0110] The optical element driving mechanism 100 includes a fixed part 200, a first movable part 300, a second movable part 400, a resilient assembly 500, a driving assembly 600, a sensing assembly 700, and a guiding assembly 800. The description in this specification is only for example, and elements can be added or deleted according to actual needs. In addition, some elements can be omitted in the figures for clarity of explanation.

[0111] The first movable part 300 is connected to the optical element OE and is movable relative to the fixed part 200. The second movable part 400 is movable relative to the fixed part 200 and the first movable part 300. The resilient assembly 500 can provide a resilient force and can transmit signals. The driving assembly 600 drives the first movable part 300 and the second movable part 400 to move relative to the fixed part 200. The sensing assembly 700 senses the movement of the first movable part 300 and the second movable part 400 relative to the fixed part 200. The guiding assembly 800 guides the movement of the first movable part 300 relative to the fixed part 200.

[0112] The fixing portion 200 has a polygonal structure, such as a rectangular or square shape, when viewed along the optical axis O. The fixing portion 200 includes a housing 210 and a base 220. The housing 210 can be connected to the base 220 by welding or the like. The space between the housing 210 and the base 220 can accommodate the first movable portion 300, the second movable portion 400, the elastic assembly 500, the driving assembly 600, the sensing assembly 700, the guiding assembly 800, and the like.

[0113] The housing 210 has a housing opening 211, a top wall 212, and four side walls 213. The housing opening 211 can allow light to pass through. The top wall 212 is substantially perpendicular to the optical axis O. The top wall 212 is closer to the incident position of the light than the side walls 213. The side walls 213 extend from the edges of the top wall 212 along the optical axis O.

[0114] In addition to Figure 1 and Figure 2 , reference is made to Figure 3A for the base 220. Figure 3A is a perspective view of the base 220 according to some embodiments. The base 220 includes a base opening 221, a base surface 222, four recessed structures 223, four protruding columns 224, a first positioning element 225, a second positioning element 226, and an embedded assembly 227.

[0115] The base opening 221 can allow light to pass through. The base surface 222 is defined as the plane of the base 220 having the maximum area perpendicular to the optical axis O. The four recessed structures 223 are formed at the four corners of the base 220, respectively. In some embodiments, the four recessed structures 223 are identical to each other. The four protruding columns 224 are disposed adjacent to the four recessed structures 223, respectively. The four protruding columns 224 protrude relative to the base surface 222. In some embodiments, the outer side surfaces (the surfaces away from the optical axis O) of the four protruding columns 224 can be in contact with the side walls 213 of the housing 210 to increase the contact area between the housing 210 and the base 220, and further reduce the possibility of the housing 210 falling off. The first positioning element 225 and the second positioning element 226 are located on the first side 1001. The first positioning element 225 and the second positioning element 226 protrude relative to the base surface 222. In some embodiments, the size of the first positioning element 225 is different from the size of the second positioning element 226.

[0116] Next, reference is made to Figure 3B for the embedded assembly 227. Figure 3BFig. 8 is a schematic diagram of an in-molded component 227 embedded in the base 220 according to some embodiments. The in-molded component 227 is embedded in the base 220. The in-molded component 227 can be connected with a power source (not shown) outside the optical element driving mechanism 100. The in-molded component 227 can include different pins, and the pins can allow current to flow in or out. In some embodiments, the in-molded component 227 is formed in the base 220 by insert molding. In some embodiments, the in-molded component 227 can be made of a metal material, such as iron (Fe), nickel (Ni), cobalt (Co), an alloy of the aforementioned metals, or the like. The in-molded component 227 can include four auto-focusing signal transmission portions 2271.

[0117] Next, please refer to Figure 2 , Figure 4A , Figure 4B to understand the first movable portion 300. Figure 4A and Figure 4B are perspective views of different angles of the first movable portion 300 according to some embodiments. The first movable portion 300 includes a first movable portion opening 310, an upper stop portion 320, a protruding portion 330, a receiving structure 340, two first contact structures 350, a second contact structure 360, three second side protrusions 370, and three fourth side protrusions 380.

[0118] The first movable portion opening 310 can allow light to pass through. The upper stop portion 320 is closer to the top wall 212 of the housing 210 than the rest of the first movable portion 300. The upper stop portion 320 can limit the movement range of the first movable portion 300. For example, when the first movable portion 300 moves toward the top wall 212 of the housing 210 to the limit, the upper stop portion 320 can contact the top wall 212 of the housing 210. The protruding portion 330 is located on the third side 1003. The protruding portion 330 can have the effect of balancing the weight. The receiving structure 340 is formed on the third side 1003.

[0119] The two first contact structures 350 are formed on one corner of the first movable portion 300, for example, the corner between the first side 1001 and the second side 1002. In some embodiments, each of the two first contact structures 350 is V-shaped when viewed along the optical axis O. In some embodiments, the two first contact structures 350 at least partially overlap each other when viewed along the optical axis O. The second contact structure 360 is formed on one corner of the first movable portion 300, for example, the corner between the third side 1003 and the fourth side 1004. In some embodiments, the second contact structure 360 is U-shaped when viewed along the optical axis O. In some embodiments, the two first contact structures 350 and the second contact structure 360 are located on opposite corners of the first movable portion 300.

[0120] Three second side protrusions 370 are located on the second side 1002. Three fourth side protrusions 380 are located on the fourth side 1004. In some embodiments, the three second side protrusions 370 are substantially symmetrical with the three fourth side protrusions 380.

[0121] Next, please refer to Figure 2 , Figure 5A , Figure 5B to understand the second movable part 400. Figure 5A is a perspective view of the second movable part 400 according to some embodiments. Figure 5B is a bottom view of the second movable part 400 according to some embodiments. The outline of the second movable part 400 is a polygon, for example, a rectangle or a square. The second movable part 400 comprises a second movable part opening 410, a first blocking part 420, a second blocking part 430, a first side recess 440, a second side recess 450, a fourth side recess 460.

[0122] The second movable part opening 410 is used to accommodate the first movable part 300. The first blocking part 420 is disposed on the top surface of the second movable part 400. In some embodiments, the first blocking part 420 is located in the same corner as the two first contact structures 350. In some embodiments, the first blocking part 420 at least partially overlaps the two first contact structures 350 when viewed along the optical axis O. The second blocking part 430 is disposed on the top surface of the second movable part 400. In some embodiments, the second blocking part 430 is located in the same corner as the second contact structure 360. In some embodiments, the second blocking part 430 at least partially overlaps the second contact structure 360 when viewed along the optical axis O.

[0123] The first side recess 440 is formed on the first side 1001. The second side recess 450 is formed on the second side 1002. The fourth side recess 460 is formed on the fourth side 1004. In some embodiments, the size of the first side recess 440 is greater than the size of the second side recess 450 and the size of the fourth side recess 460. In some embodiments, the shape and size of the second side recess 450 are substantially the same as the shape and size of the fourth side recess 460. In some embodiments, the second side recess 450 further comprises a second side recess 451. A connecting element such as glue can be applied in the second side recess 451.

[0124] In some embodiments, the second movable part 400 can also comprise an embedded component (not shown) embedded therein.

[0125] Next, please refer to Figure 2 and Figure 6 to understand the elastic component 500. Figure 6Figure 1 1 is a top view of a resilient assembly 500 according to some embodiments. The resilient assembly 500 includes a first resilient element 510 and four second resilient elements 520. The first resilient element 510 and the second resilient elements 520 are made of a resilient material or a material with ductility, such as metal. In the art, the first resilient element 510 can be referred to as a "leaf spring", a "spring leaf", a "flat spring leaf", or the like, and the second resilient elements 520 can be referred to as "suspension wires", "hanging ring wires", or the like.

[0126] The first resilient element 510 is disposed between the top wall 212 of the housing 210 and the first movable portion 300. The first resilient element 510 is also disposed between the top wall 212 of the housing 210 and the second movable portion 400. Specifically, the first resilient element 510 connects the top surface of the first movable portion 300 and the top surface of the second movable portion 400. In embodiments in which the second movable portion 400 includes a built-in assembly, the first resilient element 510 can be electrically connected to the second movable portion 400.

[0127] The first resilient element 510 can include a first side first conductive element 51 1, a first side second conductive element 512, a second side conductive element 513, and a fourth side conductive element 514. The first side first conductive element 51 1, the first side second conductive element 512, the second side conductive element 513, and the fourth side conductive element 514 are electrically independent of each other.

[0128] The first side first conductive element 51 1 and the first side second conductive element 512 are located on the first side 1001. The second side conductive element 513 is located on the second side 1002. The fourth side conductive element 514 is located on the fourth side 1004. To accommodate the size, shape, or the like of the portion of the first movable portion 300 and / or the second movable portion 400 that is contacted, the first side first conductive element 51 1, the first side second conductive element 512, the second side conductive element 513, and the fourth side conductive element 514 can include different sizes, shapes.

[0129] The first side first conductive element 51 1 can include a first side first flexible portion 51 1 1, which is a relatively thin and flexible portion of the first side first conductive element 51 1. The first side second conductive element 512 can include a first side second flexible portion 5121, which is a relatively thin and flexible portion of the first side second conductive element 512. The second side conductive element 513 can include a second side flexible portion 5131, which is a relatively thin and flexible portion of the second side conductive element 513. In some embodiments, the second side flexible portion 5131 extends substantially along the second side 1002. The fourth side conductive element 514 can include a fourth side flexible portion 5141, which is a relatively thin and flexible portion of the fourth side conductive element 514. In some embodiments, the fourth side flexible portion 5141 extends substantially along the fourth side 1004.

[0130] In some embodiments, the elastic coefficient of the first side first flexible portion 5111 is substantially the same as the elastic coefficient of the first side second flexible portion 5121. In some embodiments, the elastic coefficient of the second side flexible portion 5131 is substantially the same as the elastic coefficient of the fourth side flexible portion 5141. In some embodiments, the elastic coefficient of the first side first flexible portion 5111 is different from the elastic coefficient of the second side flexible portion 5131. Thus, the strength of the elastic force provided by the first side first flexible portion 5111 is different from the strength of the elastic force provided by the second side flexible portion 5131. The elastic force generated by the elastic assembly 500 can be adjusted according to the needs, thereby improving the stability of the optical element driving mechanism 100.

[0131] In some embodiments, the first side first flexible portion 5111 is substantially symmetrical to the first side second flexible portion 5121. In some embodiments, the second side flexible portion 5131 is substantially symmetrical to the fourth side flexible portion 5141.

[0132] The upper end of the second elastic element 520 is connected to the first elastic element 510, and the lower end is connected to the four corners of the base 220 of the fixed portion 200. As described above, the first elastic element 510 connects the first movable portion 300 and the second movable portion 400. Thus, the second elastic element 520 substantially “suspends” the first movable portion 300 and the second movable portion 400 between the housing 210 and the base 220 of the fixed portion 200. That is, the first movable portion 300 and the second movable portion 400 do not directly contact the housing 210 and the base 220.

[0133] Next, referring to Figure 2 , Figure 7A , Figure 7B , the driving assembly 600, the sensing assembly 700, and the guiding assembly 800 will be described in sequence. Figure 7A and Figure 7B are schematic diagrams of different perspectives of the first movable portion 300, the driving assembly 600, the sensing assembly 700, and the guiding assembly 800 according to some embodiments.

[0134] The driving assembly 600 includes a circuit element 610, a first side magnetic element 620, a first side coil 630, a second side magnetic element 640, a second side coil 650, a second side coil group 660, a fourth side magnetic element 670, a fourth side coil 680, and a fourth side coil group 690.

[0135] The circuit element 610 can be a circuit board, such as a flexible printed circuit (FPC) or a rigid-flex printed circuit, etc. The circuit element 610 can be provided with electronic elements such as capacitors, resistors, inductors, etc.

[0136] The first side magnetic element 620, the second side magnetic element 640, and the fourth side magnetic element 670 can be a magnet, a multi-pole magnet, a plurality of magnets bonded together, etc.

[0137] The first side coil 630, the second side coil 650, and the fourth side coil 680 are generally referred to as a wound coil in the art, which has a winding axis through the center. The wound coil is generally oval, rectangular, etc. The second side coil set 660 and the fourth side coil set 690 are generally referred to as an FP-coil in the art, which includes a circuit substrate and a circuit within. The second side coil set 660 and the fourth side coil set 690 can be plate-like, and have corresponding structures with the base 220. The wound coil can be more convenient to manufacture than the FP-coil. The FP-coil can have a thinner thickness and be more flexible in use than the wound coil.

[0138] The first side magnetic element 620 and the first side coil 630 are located at the first side 1001. The first side magnetic element 620 can be disposed in the first side recess 440 of the second movable part 400. The first side coil 630 can be disposed on the base 220, for example, the first side coil 630 can surround the first positioning element 225 and the second positioning element 226 of the base 220. In some embodiments, the first positioning element 225 and the second positioning element 226 contact an inner edge of the first side coil 630. The electromagnetic force generated between the first side magnetic element 620 and the first side coil 630 can drive the second movable part 400 to move along the Y-axis.

[0139] The second side magnetic element 640, the second side coil 650, and the second side coil set 660 are located at the second side 1002. The second side magnetic element 640 can correspond to the second side coil 650 and the second side coil set 660 at the same time. In some embodiments, the second side magnetic element 640 is disposed between the second side coil 650 and the second side coil set 660. The second side magnetic element 640 can be disposed in the second side recess 450 of the second movable part 400. The second side coil 650 can be disposed on the first movable part 300. The second side coil set 660 can be disposed on the base 220. The electromagnetic force generated between the second side magnetic element 640 and the second side coil 650 can drive the first movable part 300 to move along the Z-axis. The electromagnetic force generated between the second side magnetic element 640 and the second side coil set 660 can drive the second movable part 400 to move along the X-axis.

[0140] The fourth side magnetic element 670, the fourth side coil 680, and the fourth side coil set 690 are located at the fourth side 1004. The fourth side magnetic element 670 can correspond to both the fourth side coil 680 and the fourth side coil set 690. In some embodiments, the fourth side magnetic element 670 is disposed between the fourth side coil 680 and the fourth side coil set 690. The fourth side magnetic element 670 can be disposed within the fourth side recess 460 of the second movable part 400. The fourth side coil 680 can be disposed on the first movable part 300. (That is, the second side coil 650 and the fourth side coil 680 are disposed on opposite sides of the first movable part 300.) The fourth side coil set 690 can be disposed on the base 220. Electromagnetic forces generated between the fourth side magnetic element 670 and the fourth side coil 680 can drive the first movable part 300 to move along the Z-axis. Electromagnetic forces generated between the fourth side magnetic element 670 and the fourth side coil set 690 can drive the second movable part 400 to move along the X-axis.

[0141] As mentioned above, the movement of the first movable part 300 relative to the fixed part 200 can mainly achieve auto-focusing, and the movement of the second movable part 400 relative to the fixed part 200 can mainly achieve optical image stabilization.

[0142] In addition, because the second side magnetic element 640 corresponds to both the second side coil 650 and the second side coil set 660, and the fourth side magnetic element 670 corresponds to both the fourth side coil 680 and the fourth side coil set 690, the size of the optical element driving mechanism 100 can be reduced to achieve miniaturization.

[0143] It is worth noting that because the third side 1003 is not provided with any magnetic elements, coils, or coil sets, another optical element driving mechanism can be installed adjacent to the third side 1003 of the optical element driving mechanism 100 to reduce the possibility of electromagnetic interference between the optical element driving mechanism 100 and the aforementioned another optical element driving mechanism. In addition, because the third side 1003 is not provided with any magnetic elements, coils, or coil sets, and the movement of the second movable part 400 along the Y-axis is achieved only by the first side magnetic element 620 and the first side coil 630, the first side magnetic element 620 can have a larger size and / or volume. In some embodiments, the volume of the first side magnetic element 620 is greater than the volume of the second side magnetic element 640 and the volume of the fourth side magnetic element 670.

[0144] The sensing assembly 700 includes a first side first sensing element 710, a first side second sensing element 720, and a second side sensing element 730.

[0145] A first sensing element 710 and a second sensing element 720 are located on a first side 1001. The first sensing element 710 may be disposed on the side of the circuit element 610 facing the first movable part 300. That is, the circuit element 610 may be disposed between the first magnetic element 620 and the first sensing element 710. In some embodiments, the first movable part 300 may have a structure corresponding to the first sensing element 710. The second sensing element 720 may be disposed on the base 220. In some embodiments, the second sensing element 720 is disposed within a hole in the first coil 630. The second sensing element 730 is located on a second side 1002. The second sensing element 730 may be disposed on the base 220.

[0146] The first sensing element 710 on the first side corresponds to the first magnetic element 620 on the first side. The first sensing element 710 on the first side can be used to sense the movement of the first movable part 300 along the Z-axis. That is, the first sensing element 710 on the first side is a sensing element for sensing the autofocus function of the optical element drive mechanism 100. The second sensing element 720 and the second sensing element 730 on the first side can be used to sense the movement of the second movable part 400 along the Y-axis and X-axis. That is, the second sensing element 720 and the second sensing element 730 on the first side are sensing elements for sensing the optical image stabilization function of the optical element drive mechanism 100.

[0147] In some embodiments, the first sensing element 710 on the first side may be a Hall sensor, a giant magnetoresistive (GMR) sensor, or a tunneling magnetoresistive (TMR) sensor, etc. Hall sensors, giant magnetoresistive (GMR) sensors, and tunneling magnetoresistive (TMR) sensors represent that, in addition to the Hall element, GMR element, and TMR element, they also integrate other components such as amplifier circuits, temperature compensation circuits, and voltage regulator circuits, and are thus referred to as all-in-one integrated circuits (All-in-One ICs). All-in-one ICs can supply power to other components after being powered externally and also have control functions.

[0148] like Figure 7A as well as Figure 7B As shown, the first sensing element 710 on the first side includes an inner surface 711 and an outer surface 712, with the outer surface 712 located between the inner surface 711 and the first magnetic element 620 on the first side. The inner surface 711 and the outer surface 712 may be parallel to each other. The inner surface 711 and the outer surface 712 may be substantially parallel to the first side 1001.

[0149] The first side first sensing element 710 can include an internal wafer (not shown) for performing a sensing function. In some embodiments, the shortest distance between the internal wafer and the outer side surface 712 is different from the shortest distance between the internal wafer and the inner side surface 711 when viewed along the optical axis O. In some embodiments, the shortest distance between the internal wafer and the outer side surface 712 is smaller than the shortest distance between the internal wafer and the inner side surface 711 when viewed along the optical axis O. That is, the internal wafer of the first side first sensing element 710 is closer to the outer side surface 712 than the inner side surface 711. In this way, the internal wafer of the first side first sensing element 710 is closer to the first side magnetic element 620, and sensing accuracy can be improved.

[0150] The guiding assembly 800 includes a first guiding element 810, a first upper fixing element 820, a first lower fixing element 830, a first magnetic element 840, a first magnetic conducting element 850, a second guiding element 860, a second upper fixing element 870, a second lower fixing element 880, and a second magnetic element 890.

[0151] The first guiding element 810 and the second guiding element 860 can include a metal material. In some embodiments, a magnetic conductivity of the first guiding element 810 is different from a magnetic conductivity of the second guiding element 860. In some embodiments, the magnetic conductivity of the first guiding element 810 is smaller than the magnetic conductivity of the second guiding element 860. In some embodiments, the first guiding element 810 is formed of a non-magnetic material.

[0152] The first guiding element 810 can be disposed at one corner of the optical element driving mechanism 100, for example, at a corner between the first side 1001 and the second side 1002. The first guiding element 810 extends along the optical axis O. The first guiding element 810 is disposed between the first upper fixing element 820 and the first lower fixing element 830. The first guiding element 810 can contact two first contact structures 350 of the first movable part 300. The first upper fixing element 820 can contact the first blocking part 420 of the second movable part 400. The first lower fixing element 830 can be disposed on the base 220 of the fixed part 200. By the first upper fixing element 820 and the first lower fixing element 830, the possibility of unwanted shaking of the first guiding element 810 can be reduced.

[0153] The first magnetic element 840 and the first magnetic conductive element 850 can be disposed adjacent to the first guiding element 810. The first magnetic conductive element 850 can be disposed on the circuit element 610. In some embodiments, the first movable part 300 can have a structure corresponding to the first magnetic conductive element 850. In some embodiments, the first magnetic conductive element 850 is closer to the second side 1002 than to the fourth side 1004. That is, when viewed along the optical axis O, the central axis of the first magnetic conductive element 850 passing through the center of the first magnetic conductive element 850 and parallel to the base surface 222 does not overlap with the central axis of the optical element driving mechanism 100 passing through the center of the optical element driving mechanism 100 and parallel to the base surface 222. The first magnetic conductive element 850 can be made of a magnetic conductive material. The magnetic conductive material represents a material having magnetic permeability. The magnetic force generated between the first magnetic element 840 and the first magnetic conductive element 850 can ensure the close contact between the first guiding element 810 and the first movable part 300.

[0154] It is worth noting that the first side magnetic element 620 of the driving assembly 600 can serve as the first magnetic element 840 of the guiding assembly 800. Because there is no need to dispose an additional magnetic element, the volume of the optical element driving mechanism 100 can be reduced to achieve miniaturization.

[0155] The second guiding element 860 can be disposed at one of the corners of the optical element driving mechanism 100, for example, at the corner between the third side 1003 and the fourth side 1004. The second guiding element 860 extends along the optical axis O. The second guiding element 860 is disposed between the second upper fixed element 870 and the second lower fixed element 880. The second guiding element 860 can contact the second contact structure 360 of the first movable part 300. The second upper fixed element 870 can contact the second blocking part 430 of the second movable part 400. The second lower fixed element 880 can be disposed on the base 220 of the fixed part 200. Through the second upper fixed element 870 and the second lower fixed element 880, the possibility of unwanted shaking of the second guiding element 860 can be reduced.

[0156] The second magnetic element 890 can be disposed adjacent to the second guiding element 860. The second magnetic element 890 can be disposed in the accommodation structure 340 of the first movable part 300. The magnetic force generated between the second magnetic element 890 and the second guiding element 860 can ensure the close contact between the second guiding element 860 and the first movable part 300.

[0157] When the driving assembly 600 drives the first movable part 300 to move, the guiding assembly 800 can effectively guide the movement of the first movable part 300 along the Z-axis to increase the overall stability of the optical element driving mechanism 100.

[0158] Next, please refer toFigures 8 to 15 . Figure 8 and Figure 9 is a perspective view of the optical element driving mechanism 100 omitting some elements according to some embodiments. Figure 10 is a top view of the optical element driving mechanism 100 omitting some elements according to some embodiments. Figure 11 is a side view of the optical element driving mechanism 100 omitting some elements according to some embodiments. Figure 12 and Figure 13 is a perspective view of the optical element driving mechanism 100 omitting some elements according to some embodiments. Figure 14 is a top view of the optical element driving mechanism 100 omitting some elements according to some embodiments. Figure 15 is a side view of the optical element driving mechanism 100 omitting some elements according to some embodiments.

[0159] Figures 8 to 15 are provided to facilitate understanding of details in the optical element driving mechanism 100, such as the positional relationship between elements. For example, from Figures 8 to 15 one can understand how the first side magnetic element 620 is disposed above the first side coil 630. In addition, for example, from Figures 8 to 15 one can understand how the second side magnetic element 640 is disposed above the second side sensing element 730.

[0160] Finally, please refer to Figure 16 and Figure 17 to understand the signal transmission of the auto-focusing function. Figure 16 is a schematic view of the optical element driving mechanism 100 omitting some elements according to some embodiments. Figure 17 is a top view of the optical element driving mechanism 100 omitting some elements according to some embodiments.

[0161] A soldering element such as a solder ball can be applied between the first elastic element 510 and the circuit element 610, so that the first elastic element 510 is electrically connected to the circuit element 610. There can be multiple soldering points between the first elastic element 510 and the circuit element 610, for example, four. In some embodiments, there are two soldering points between the first conductive element 511 of the first elastic element 510 and the circuit element 610, and there are also two soldering points between the second conductive element 512 of the first elastic element 510 and the circuit element 610.

[0162] When the first movable part 300 is intended to be driven to move along the Z-axis, the signal related to the auto-focusing function can be sequentially transmitted from the four auto-focusing signal transmission parts 2271 to the four second elastic elements 520, the first elastic element 510, the circuit element 610 (and the first side first sensing element 710 thereon). Through the design of the signal transmission of the present application, the auto-focusing function of the optical element driving mechanism 100 can be better achieved.

[0163] Based on the present application, in the case that no magnetic element, coil or coil group is arranged on one side of the optical element driving mechanism, the optical element driving mechanism can still effectively achieve the auto-focusing function and the optical anti-shake function. Such design facilitates the installation of another optical element driving mechanism and reduces the possibility of electromagnetic interference between the two optical element driving mechanisms, and can increase the flexibility of the design. In addition, the optical element driving mechanism of the present application can be matched with a sensing assembly, a guiding assembly, etc.

[0164] The foregoing outlines features of several embodiments so that those skilled in the art can better understand the various aspects of the present application. Those skilled in the art should appreciate that they can readily use the present application as a basis for designing or modifying other processes and structures as the same further relates to the principles of the present application and that such other processes and structures fall within the scope of the present application. Those skilled in the art should appreciate that such equivalent arrangements do not depart from the spirit and scope of the present application, and that various changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application.

Claims

1. An optical element driving mechanism characterized by comprising: include: One fixed part; A first movable part is used to connect an optical element having an optical axis, and the first movable part is movable relative to the fixed part; A drive component for driving the movement of the first movable part; and One sensing component; When viewed along the optical axis, the optical element driving mechanism is polygonal, including a first side, a second side, a third side, and a fourth side, with the third side opposite to the first side and the fourth side opposite to the second side. The driving component includes a circuit element located on the first side and a first-side magnetic element located on the first side. The sensing component includes a first-side sensing element disposed on the circuit element. When viewed along the optical axis, the circuit element is located between the first-side sensing element and the first-side magnetic element.

2. The optical element drive mechanism according to claim 1, wherein The first sensing element on the first side includes an inner surface and an outer surface that are parallel to each other. The outer surface is located between the inner surface and the first magnetic element on the first side. The first sensing element on the first side also includes an inner wafer. When viewed along the optical axis, the shortest distance between the inner wafer and the outer surface is different from the shortest distance between the inner wafer and the inner surface.

3. The optical element drive mechanism according to claim 1, wherein It also includes a resilient component electrically connected to the drive assembly, wherein the resilient component comprises: A first conductive element on a first side is electrically connected to the circuit element; A second conductive element on the first side is electrically connected to the circuit element; A second conductive element, electrically connected to the circuit element; and A fourth conductive element is electrically connected to the circuit element; Among them, the first conductive element on the first side, the second conductive element on the first side, the second conductive element on the second side, and the fourth conductive element on the fourth side are electrically independent of each other.

4. The optical element drive mechanism according to claim 3, wherein The first conductive element on the first side includes a first flexible portion on the first side, and the second conductive element on the first side includes a second flexible portion on the first side, and the first flexible portion on the first side and the second flexible portion on the first side are symmetrical.

5. The optical element drive mechanism according to claim 1, wherein The drive assembly also includes a second-side magnetic element located on the second side, a second coil located on the second side, and a second coil group located on the second side, wherein the volume of the first-side magnetic element is different from the volume of the second-side magnetic element.

6. The optical element driving mechanism as described in claim 1, characterized in that, It also includes a guide component for guiding the movement of the first active part, wherein the guide component includes: A first guiding element extends along the optical axis and is located at the corner between the first side and the second side; and A second guiding element extends along the optical axis and is located at the corner between the third side and the fourth side; The magnetic permeability coefficient of the first guiding element is different from that of the second guiding element.

7. The optical element driving mechanism as described in claim 6, characterized in that, The guiding assembly also includes a first magnetic element disposed adjacent to the first guiding element, wherein the first magnetic element is closer to the second side than to the fourth side.

8. The optical element driving mechanism as described in claim 6, characterized in that, It also includes a second movable part that accommodates the first movable part, wherein the guide assembly further includes a first upper fixing element that contacts the second movable part.

9. The optical element driving mechanism as described in claim 6, characterized in that, The first active part includes two first contact structures and a second contact structure. The first guiding element contacts the two first contact structures, and the second guiding element contacts the second contact structure. When viewed along the optical axis, the two first contact structures at least partially overlap each other.

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