Optical element driving mechanism

Abstract

Some embodiments of the utility model provide an optical element driving mechanism. The optical element driving mechanism is provided with a central shaft. The optical element driving mechanism comprises a fixed part, a first movable part and a first driving assembly. The fixing part comprises a base. The first movable part is connected with a first optical element. The first movable part can move relative to the base. The first driving assembly drives the first movable part to move relative to the base.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical element drive mechanism, especially optical element drive mechanism with multiple circuit elements. BACKGROUND

[0002] With the development of science and technology, nowadays many electronic devices (for example, smart phones or tablet computers) all have the function of taking pictures or recording videos. Through the optical element arranged on the electronic device and the optical element drive mechanism driving the optical element, the user can take pictures. When the user uses the electronic device, shaking and vibration may occur, causing the photographed image to be blurred. Therefore, it is necessary to improve the quality of the photographed image. SUMMARY

[0003] The utility model discloses an optical element drive mechanism to solve at least one of the above problems.

[0004] Some embodiments of the utility model provide an optical element drive mechanism. The optical element drive mechanism has a center axis. The optical element drive mechanism includes a fixed part, a first movable part and a first drive assembly. The fixed part includes a base. The first movable part is connected to a first optical element. The first movable part can move relative to the base. The first drive assembly drives the first movable part to move relative to the base.

[0005] In some embodiments, the optical element drive mechanism further includes a first side circuit element electrically connected to the first drive assembly. The base includes an embedded circuit, and the first side circuit element includes a first side circuit element first part. The first side circuit element has a plate structure and is arranged on the base. The first side circuit element first part includes a first side circuit element electrical connection part, and the first side circuit element first part is electrically connected to the embedded circuit of the base via the first side circuit element electrical connection part. The base includes a base first surface facing the first side circuit element first part, and when viewed in the direction perpendicular to the center axis, the base first surface is located between the center of the first movable part and the first side circuit element first part.

[0006] In some embodiments, the first side circuit element further comprises: a first side circuit element second portion having a plate-like structure and being non-parallel to the first side circuit element first portion; and a first side circuit element bending portion connecting the first side circuit element first portion and the first side circuit element second portion, wherein the first driving assembly electrically connects the first side circuit element first portion via the first side circuit element second portion; wherein the first driving assembly comprises a first side coil, the first side coil comprises a first side coil outer surface facing the first side circuit element second portion, the first side coil outer surface at least partially overlaps the first side circuit element first portion when viewed along a direction perpendicular to the central axis.

[0007] In some embodiments, the first side circuit element further comprises: a first side circuit element protruding portion having a plate-like structure, being non-parallel to the first side circuit element first portion and parallel to the first side circuit element second portion, wherein the first side circuit element protruding portion does not overlap the first side circuit element second portion when viewed along a direction perpendicular to the central axis.

[0008] In some embodiments, further comprising a position sensing assembly for sensing movement of the first movable portion, wherein the position sensing assembly comprises a position sensing element, the position sensing element is disposed on the first side circuit element protruding portion, and the position sensing assembly electrically connects the first side circuit element first portion via the first side circuit element protruding portion.

[0009] In some embodiments, further comprising a guiding assembly for guiding movement of the first movable portion relative to the base and a position sensing element for sensing movement of the first movable portion, wherein the guiding assembly comprises a second corner guiding element, a center of the first side coil outer surface is located between the position sensing element and the second corner guiding element when viewed along a direction perpendicular to the central axis.

[0010] In some embodiments, further comprising a pair of external circuit elements, wherein the first side circuit element electrically connects an external circuit via the pair of external circuit elements, and the pair of external circuit elements comprises: a pair of external circuit element first portions having plate-like structures; and a pair of external circuit element second portions having plate-like structures and being non-parallel to the pair of external circuit element first portions, wherein the pair of external circuit element second portions comprises a pair of external circuit element electrical connection portions, the pair of external circuit element second portions electrically connect the embedded circuit of the base via the pair of external circuit element electrical connection portions, wherein the pair of external circuit element second portions electrically connect the external circuit via the pair of external circuit element first portions, and wherein the pair of external circuit element second portions are parallel to the first side circuit element first portion.

[0011] In some embodiments, the base first surface is located between the first side circuit element first portion and the pair of external circuit element second portions when viewed along a direction perpendicular to the central axis, and the first side circuit element electrically connecting portion does not overlap the pair of external circuit element electrically connecting portions when viewed along a direction perpendicular to the central axis.

[0012] In some embodiments, a second movable portion is further included, the second movable portion connecting a second optical element, wherein the pair of external circuit element further comprises: a pair of external circuit element third portion having a plate structure and being non-parallel to the pair of external circuit element first portion and the pair of external circuit element second portion; and a pair of external circuit element movable portion connecting the pair of external circuit element third portion, wherein the base is disposed between the first movable portion and the second movable portion, and the pair of external circuit element third portion is disposed in the second movable portion.

[0013] In some embodiments, the fixed portion further comprises a housing and a fixed element, the fixed element being disposed between the housing and the first movable portion and at least partially covering a top surface of the first movable portion and a top surface of the base.

[0014] The optical element driving mechanism provided by the present application can drive different optical elements to move through different driving assemblies. The driving assemblies can provide relatively large driving force, so they can be matched with optical elements that have relatively large volume or weight. The circuit assembly includes multiple circuit elements, so it can achieve the function of integrated circuit. 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 perspective view of an optical element driving mechanism according to some embodiments.

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

[0018] Figure 3 is a schematic view of a housing according to some embodiments.

[0019] Figure 4 is a schematic view of a fixed element according to some embodiments.

[0020] Figure 5 is a schematic view of a base according to some embodiments.

[0021] Figure 6 is a perspective view of the first movable part according to some embodiments.

[0022] Figure 7 is a perspective view of the second movable part according to some embodiments.

[0023] Figure 8A 、 Figure 8B 、 Figure 8C is a schematic diagram for illustrating how the second driving assembly drives the second movable part.

[0024] Figure 9 is a schematic diagram of the first side circuit element and the third side circuit element according to some embodiments.

[0025] Figure 10 is a schematic diagram of the external circuit element according to some embodiments.

[0026] Figure 11 and Figure 12 are schematic diagrams of different perspectives of the base and the circuit assembly according to some embodiments.

[0027] Figure 13 、 Figure 14 、 Figure 15 are perspective views of different perspectives of the optical element driving mechanism omitting the housing.

[0028] Figure 16 is a top view of the optical element driving mechanism omitting the housing.

[0029] Figure 17 and Figure 18 are perspective views of different perspectives of the optical element driving mechanism omitting the housing, the fixing element, the second movable part.

[0030] Figure 19 is a sectional view of the optical element driving mechanism omitting the housing.

[0031] Reference signs are as follows:

[0032] 100: optical element driving mechanism

[0033] 200: fixed part

[0034] 210: housing

[0035] 211: upper part of the housing

[0036] 212: lower part of the housing

[0037] 220: fixing element

[0038] 221: hole of the fixing element

[0039] 230: base

[0040] 231: base upper portion

[0041] 232: base lower portion

[0042] 233: embedded circuit

[0043] 235: base first surface

[0044] 236: base second surface

[0045] 310: first movable portion

[0046] 311: first movable portion opening

[0047] 312: first movable portion recess

[0048] 320: second movable portion

[0049] 321: second movable portion opening

[0050] 322: second movable portion protrusion

[0051] 400: elastic assembly

[0052] 410: first elastic element

[0053] 420: bounce elastic element

[0054] 430: second elastic element

[0055] 500: first drive assembly

[0056] 510: first side coil

[0057] 515: first side coil outer surface

[0058] 520: first side magnetic element

[0059] 530: third side coil

[0060] 540: third side magnetic element

[0061] 600: second drive assembly

[0062] 610: drive element

[0063] 610A: first drive element

[0064] 610B: second drive element

[0065] 610C: third drive element

[0066] 610D: fourth drive element

[0067] 700: guiding assembly

[0068] 710: second corner guiding element

[0069] 720: second corner magnetic element

[0070] 730: fourth corner guiding element

[0071] 740: fourth corner magnetic element

[0072] 750: guiding spherical element

[0073] 760: guiding magnetic element

[0074] 800: position sensing assembly

[0075] 810: position sensing element

[0076] 900: circuit assembly

[0077] 910: first side circuit element

[0078] 911: first side circuit element first portion

[0079] 912: first side circuit element second portion

[0080] 913: first side circuit element bending portion

[0081] 914: first side circuit element protruding portion

[0082] 920: third side circuit element

[0083] 921: third side circuit element first portion

[0084] 922: third side circuit element second portion

[0085] 923: third side circuit element bending portion

[0086] 930: external circuit element

[0087] 931: external circuit element first portion

[0088] 932: external circuit element second portion

[0089] 933: external circuit element third portion

[0090] 934: external circuit element movable portion

[0091] 1001: first side

[0092] 1002: second side

[0093] 1003: Third side

[0094] 1004: Fourth side

[0095] 2001: The First Corner

[0096] 2002: The Second Corner

[0097] 2003: The Third Corner

[0098] 2004: The Fourth Corner

[0099] 2111: Outer shell groove

[0100] 2121: Top Wall

[0101] 2122: Sidewall

[0102] 9111: Electrical connection part of the first side circuit element

[0103] 9311: Foot Insertion

[0104] 9321: Electrical connection parts for external circuit components

[0105] C: Central axis Detailed Implementation

[0106] This specification provides numerous different embodiments or examples to implement various features of the present invention. Furthermore, relative spatial terms may be used in this specification to describe the arrangement of the various features. 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 accordingly. For example, if the drawings are flipped so that the device is upside down, the feature "above" will become the feature "below".

[0107] If this specification describes a first feature being formed "on", "above", or "below" a second feature, it indicates 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.

[0108] 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.

[0109] Reference is first made to Figure 1 and Figure 2 for an optical element driving mechanism 100. Figure 1 is a perspective view of an optical element driving mechanism 100 according to some embodiments. Figure 2 is an exploded view of an optical element driving mechanism 100 according to some embodiments.

[0110] The optical element driving mechanism 100 has a central axis C. The central axis C is a virtual axis passing through the center of the optical element driving mechanism 100. When viewed along the central axis C, the optical element driving mechanism 100 has a polygonal structure, for example, a quadrilateral. For ease of illustration, the 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, respectively. 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 central axis C.

[0111] When viewed along the central axis C, the first side 1001 and the third side 1003 are parallel to and extend along a first axis A1. When viewed along the central axis C, the second side 1002 and the fourth side 1004 are parallel to and extend along a second axis A2. The first axis A1 and the second axis A2 are substantially perpendicular to the central axis C.

[0112] In addition, the four corners of the optical element driving mechanism 100 are defined as a first corner 2001, a second corner 2002, a third corner 2003, and a fourth corner 2004, respectively. The first corner 2001 is located between the first side 1001 and the fourth side 1004. The second corner 2002 is located between the first side 1001 and the second side 1002. The third corner 2003 is located between the second side 1002 and the third side 1003. The fourth corner 2004 is located between the third side 1003 and the fourth side 1004.

[0113] The optical element driving mechanism 100 includes a fixed part 200, a first movable part 310, a second movable part 320, a resilient assembly 400, a first driving assembly 500, a second driving assembly 600, a guiding assembly 700, a position sensing assembly 800, and a circuit assembly 900.

[0114] The first movable part 310 and the second movable part 320 can move relative to the fixed part 200. The elastic assembly 400 connects the first movable part 310 and the fixed part 200, and connects the second movable part 320 and the fixed part 200. The first driving assembly 500 can drive the first movable part 310 to move along the central axis C relative to the fixed part 200 to focus on the object being photographed, so as to achieve auto focus (AF). The second driving assembly 600 can drive the second movable part 320 to move along the first axis A1 and the second axis A2 relative to the fixed part 200 to compensate for the problem of image or image blur caused by the shaking of the user or the impact of external force, so as to achieve optical image stabilization (OIS). The guide assembly 700 can guide the movement of the first movable part 310 and the second movable part 320. The position sensing assembly 800 can sense the movement of the first movable part 310. The circuit assembly 900 can transmit current.

[0115] The fixed part 200 includes a housing 210, a fixed element 220, and a base 230. The elastic assembly 400 includes a plurality of first elastic elements 410, two elastic elements 420, and two second elastic elements 430. The first driving assembly 500 includes a first side coil 510, a first side magnetic element 520, a third side coil 530, and a third side magnetic element 540. The second driving assembly 600 includes a plurality of driving elements 610.

[0116] The guide assembly 700 includes a second corner guide element 710, a second corner magnetic element 720, a fourth corner guide element 730, a fourth corner magnetic element 740, a plurality of guide spherical elements 750, and a plurality of guide magnetic elements 760. The position sensing assembly 800 includes a position sensing element 810. The circuit assembly 900 includes a first side circuit element 910, a third side circuit element 920, and a pair of external circuit elements 930. The description in the present specification is only as an example, and elements can be added or deleted according to actual needs.

[0117] The optical element driving mechanism 100 can be matched with a first optical element (not shown), a second optical element (not shown), and a third optical element (not shown). The first optical element can be arranged on the first movable part 310 and driven to move by the movement of the first movable part 310. The first optical element can be one or more lenses, and the lenses can be made of plastic or glass.

[0118] The second optical element can be disposed on the second movable portion 320 and be moved by the movement of the second movable portion 320. The second optical element can be a photosensitive element, such as a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensor (CIS). Light can be imaged on the second optical element. The third optical element can be disposed above the optical element driving mechanism 100. The third optical element can be an aperture to control the amount of light entering the optical element driving mechanism 100.

[0119] Next, refer to Figure 1 and Figure 2 together with Figures 3 to 5 to understand the fixed portion 200. Figure 3 is a schematic view of a housing 210 according to some embodiments. Figure 4 is a schematic view of a fixing element 220 according to some embodiments. Figure 5 is a schematic view of a base 230 according to some embodiments.

[0120] The housing 210 can be used to house the base 230, the first movable portion 310, the elastic assembly 400, the first driving assembly 500, etc. The housing 210 can be made of metal or plastic. The housing 210 includes a housing upper portion 211 and a housing lower portion 212. The housing upper portion 211 can have a circular or polygonal profile. The housing lower portion 212 can have a polygonal profile, such as a quadrilateral profile. The housing upper portion 211 can fall completely within the range of the housing lower portion 212 when viewed from above.

[0121] The housing upper portion 211 includes two housing grooves 2111. The two housing grooves 2111 are formed adjacent to the first corner 2001 and the third corner 2003, respectively. The housing lower portion 212 includes a top wall 2121 and a plurality of side walls 2122. The top wall 2121 is perpendicular to the central axis C. The side walls 2122 extend from the edges of the top wall 2121 along the central axis C.

[0122] The fixing element 220 is disposed between the housing 210 and the first movable portion 310. The fixing element 220 can at least partially cover the top surface of the first movable portion 310 and the top surface of the base 230. In some embodiments, the fixing element 220 can be disposed on the base 230 after a sticking element, such as glue, is applied to the surface of the fixing element 220 facing the base 230, such as the inner side surfaces of the fixing element 220. The fixing element 220 can include a metal material. In some embodiments, the fixing element 220 is made by stamping.

[0123] In some embodiments, the surfaces of the housing 210 and the securing element 220 opposite to each other (e.g., the inner surface of the housing upper portion 211 and the top surface of the securing element 220) comprise anti-reflective materials to reduce the effect of stray light. The securing element 220 comprises two securing element holes 221. The two securing element holes 221 are formed adjacent to the second corner 2002 and the fourth corner 2004, respectively.

[0124] The base 230 is disposed between the first movable portion 310 and the second movable portion 320. The base 230 can be used to accommodate the first movable portion 310. The base 230 comprises a base upper portion 231 and a base lower portion 232. The base upper portion 231 can have a circular or polygonal shape and can match the shape of the first movable portion 310. The base lower portion 232 can have a polygonal shape, e.g., a quadrilateral shape. The base upper portion 231 can be completely within the range of the base lower portion 232 when viewed from the top.

[0125] The base 230 can further comprise an embedded circuit 233 embedded therein. In some embodiments, the embedded circuit 233 can be formed in the base 230 by insert molding. The embedded circuit 233 is made of a conductive material, such as metal. For the convenience of illustration, the embedded circuit 233 is shown in Figure 5 , but it should be understood that the embedded circuit 233 is embedded in the base 230.

[0126] Next, in addition to Figure 1 and Figure 2 , reference is made to Figure 6 and Figure 7 to understand the first movable portion 310 and the second movable portion 320. Figure 6 is a perspective view of the first movable portion 310 according to some embodiments. Figure 7 is a perspective view of the second movable portion 320 according to some embodiments.

[0127] The first movable portion 310 comprises a first movable portion opening 311 and two first movable portion grooves 312. The first movable portion opening 311 can accommodate the first optical element. The two first movable portion grooves 312 are formed adjacent to the second corner 2002 and the fourth corner 2004, respectively. Because of the viewing angle, Figure 6 only a single first movable portion groove 312 is shown. The portion of the first movable portion 310 adjacent to the first side 1001 and the third side 1003 comprises a straight segment, while the portion of the first movable portion 310 adjacent to the second side 1002 and the fourth side 1004 comprises a curved segment.

[0128] The second movable portion 320 includes a second movable portion opening 321 and two second movable portion protrusions 322. The second movable portion opening 321 can accommodate a second optical element. The two second movable portion protrusions 322 are respectively disposed adjacent to the first corner 2001 and the third corner 2003.

[0129] Reference is made separately to Figure 2 The first elastic elements 410, the bounce elastic elements 420, and the second elastic elements 430 are made of elastic or ductile materials, such as metal. In the art, the first elastic elements 410, the bounce elastic elements 420, and the second elastic elements 430 can be referred to as “spring pieces”, “spring tabs”, “leaf spring pieces”, and the like.

[0130] In some embodiments, the number of the first elastic elements 410 can be four, and two by two. For example, one group of the first elastic elements 410 is disposed adjacent to the second side 1002, and another group of the first elastic elements 410 is disposed adjacent to the fourth side 1004.

[0131] The first elastic elements 410 include a fixed portion connecting portion (not labeled) connecting the base 230, a first movable portion connecting portion (not labeled) connecting the first movable portion 310, and a deformation portion (not labeled) between the fixed portion connecting portion and the first movable portion connecting portion. Similarly, the second elastic elements 430 include a fixed portion connecting portion (not labeled) connecting the base 230, a second movable portion connecting portion (not labeled) connecting the second movable portion 320, and a deformation portion (not labeled) between the fixed portion connecting portion and the second movable portion connecting portion.

[0132] The first elastic elements 410 and the second elastic elements 430 mainly deform by elongation or shortening of the deformation portions thereof. By the first elastic elements 410 and the second elastic elements 430, the movement range of the first movable portion 310 and / or the second movable portion 320 can be limited when the first movable portion 310 and / or the second movable portion 320 moves relative to the fixed portion 200. Thus, damage of the first movable portion 310 and / or the second movable portion 320 due to collision with other elements when the optical element driving mechanism 100 moves or is impacted by external force can be avoided.

[0133] The bounce elastic elements 420 are disposed between the first movable portion 310 and the second movable portion 320. Two bounce elastic elements 420 are respectively disposed adjacent to the second side 1002 and the fourth side 1004.

[0134] Reference is made separately to Figure 2The first side coil 510 and the third side coil 530 can include or be coils wound with enameled wire, FP coils, or the like, and can be combinations with a flexible printed circuit board (FPC), a rigid-flexible printed circuit board, or the like. In some embodiments, the first side coil 510 and the third side coil 530 are both combinations of FP coils and flexible circuit boards.

[0135] The first side magnetic element 520 and the third side magnetic element 540 can be magnets. In some embodiments, the first side magnetic element 520 and the third side magnetic element 540 can be magnetic elements arranged in a Halbach magnetic array.

[0136] The first side coil 510 and the first side magnetic element 520 are disposed on the first side 1001. The position of the first side coil 510 corresponds to the position of the first side magnetic element 520. The third side coil 530 and the third side magnetic element 540 are disposed on the third side 1003. The position of the third side coil 530 corresponds to the position of the third side magnetic element 540.

[0137] The driving force (magnetic force) generated between the first side coil 510 and the first side magnetic element 520 and the driving force (magnetic force) generated between the third side coil 530 and the third side magnetic element 540 can drive the first movable part 310 along with the first optical element relative to the fixed part 200 along the central axis C.

[0138] Because the first side magnetic element 520, the third side magnetic element 540, and the two bounce elastic elements 420 are respectively disposed on different sides of the optical element driving mechanism 100, space can be effectively utilized, and miniaturization can be achieved.

[0139] Next, in addition to Figure 1 and Figure 2 , reference is made to Figure 8A , Figure 8B , Figure 8C to understand the second driving assembly 600. Figure 8A , Figure 8B , Figure 8C are schematic diagrams for illustrating how the second driving assembly 600 drives the second movable part 320.

[0140] The driving elements 610 are arranged below the second movable part 320. In some embodiments, the second driving assembly 600 includes four driving elements 610 arranged at the first side 1001, the second side 1002, the third side 1003, and the fourth side 1004, respectively. In some embodiments, the driving elements 610 are made of shape memory alloy (SMA), such as Fe-based alloy, Cu-based alloy (e.g., Cu-Zn-Al alloy, Cu-Al-Ni alloy), Ti-Ni alloy, Ti-Pd alloy, Ti-Ni-Cu alloy, Ti-Ni-Pd alloy, Au-Cd alloy, In-Tl alloy, or the like, or a combination thereof.

[0141] The shape memory alloy will deform when the temperature changes. Therefore, the same or different driving signals can be applied to the four driving elements 610 respectively to independently control the temperature of each driving element 610, thereby changing the length of each driving element 610. For example, when the driving signal is applied to change the temperature of the driving element 610, the length of the driving element 610 is thus elongated or shortened, driving the second movable part 320 and the second optical element on the second movable part 320 to move. Therefore, the positional relationship of the second movable part 320 relative to the fixed part 200 is changed. When the driving signal is stopped, the driving element 610 can return to the original length.

[0142] It is worth noting that both ends of each of the driving elements 610 are connected to the base 230 and the second movable part 320, respectively. When the driving element 610 is in action, the base 230 remains stationary. For the sake of convenience, Figures 8A to 8C The base 230 and the second movable part 320 are shown in a relatively simplified manner, and the four driving elements 610 are further defined as a first driving element 610A, a second driving element 610B, a third driving element 610C, and a fourth driving element 610D.

[0143] As shown in FIG. 6A, at this time, no driving signal is applied, and the first driving element 610A, the second driving element 610B, the third driving element 610C, and the fourth driving element 610D all maintain the original length and are arranged symmetrically in pairs. Figure 8A As shown in FIG. 6B, when the driving signal is applied to elongate the length of the second driving element 610B and shorten the length of the fourth driving element 610D, the second movable part 320 can be positionally corrected and displacement compensated relative to the fixed part 200 in the direction indicated by the arrow (negative X-axis).

[0144] It can be inferred that when the length of the second driving element 610B is shortened and the length of the fourth driving element 610D is elongated, the second movable part 320 can be positionally corrected and displacement compensated relative to the fixed part 200 in the positive X-axis direction. Figure 8B Figure 8B It can be inferred that when the length of the second driving element 610B is shortened and the length of the fourth driving element 610D is elongated, the second movable part 320 can be positionally corrected and displacement compensated relative to the fixed part 200 in the positive X-axis direction. ​

[0145] like Figure 8C As shown, when the applied drive signal causes the length of the first drive element 610A to extend and the length of the third drive element 610C to shorten, the second movable part 320 can perform position correction and displacement compensation relative to the fixed part 200 in the direction indicated by the arrow (positive Y-axis). Figure 8C It can be inferred that when the length of the first driving element 610A is extended and the length of the third driving element 610C is shortened, the second movable part 320 can perform position correction and displacement compensation relative to the fixed part 200 along the negative Y-axis.

[0146] In summary, by applying appropriate drive signals to the first drive assembly 500 and / or the second drive assembly 600, the first drive assembly 500 can drive the first movable part 310 to move relative to the fixed part 200 in a direction parallel to the central axis C, and the second drive assembly 600 can drive the second movable part 320 to move relative to the fixed part 200 in a direction perpendicular to the central axis C. In the art, the movement of the second optical element driven by the second movable part 320 relative to the fixed part 200 in a direction perpendicular to the central axis C can be referred to as sensor-shift.

[0147] The quality of the image produced by the optical element driving mechanism 100 can be improved by the movement of the first movable part 310 and / or the second movable part 320. Furthermore, the first driving assembly 500 and the second driving assembly 600 can provide relatively large driving force, thus allowing for the use of larger or heavier optical elements. In some embodiments, the second optical element may be a one-inch photosensitive element.

[0148] Next, please refer to the following separately. Figure 2 To understand the guide component 700 and the position sensing component 800.

[0149] The second corner guide element 710 and the fourth corner guide element 730 may have substantially the same structure. The second corner guide element 710 and the fourth corner guide element 730 may have an elongated structure extending along the central axis C, for example, a rod or bar shape. The second corner guide element 710 and the fourth corner guide element 730 may be made of metal or plastic material.

[0150] The second corner magnetic element 720 and the fourth corner magnetic element 740 may have substantially the same structure. Both the second corner magnetic element 720 and the fourth corner magnetic element 740 may be polygonal. The second corner magnetic element 720 and the fourth corner magnetic element 740 may be magnetically permeable elements or magnets, etc. Magnetically permeable elements mean that they are made of materials with high magnetic permeability, such as ferromagnetic materials, including iron (Fe), nickel (Ni), cobalt (Co), or alloys thereof.

[0151] The second corner guiding element 710 and the second corner magnetic element 720 are disposed adjacent to the second corner 2002. The fourth corner guiding element 730 and the fourth corner magnetic element 740 are disposed adjacent to the fourth corner 2004. In some embodiments, the second corner magnetic element 720 and the fourth corner magnetic element 740 are disposed in two first movable portion grooves 312 of the first movable portion 310, respectively.

[0152] The second corner magnetic element 720 can generate magnetic attraction with the first side magnetic element 520, and the fourth corner magnetic element 740 can generate magnetic attraction with the fourth side magnetic element 540, so that the second corner guiding element 710 and the fourth corner guiding element 730 are in close contact with the first movable portion 310. In this way, the movement of the first movable portion 310 relative to the fixed portion 200 along the central axis C can be ensured, and the possibility of unwanted shaking of the first movable portion 310 can be reduced.

[0153] In some embodiments, the top end of the second corner guiding element 710 and the top end of the fourth corner guiding element 730 can be connected (e.g., by welding) with two fixed element holes 221, respectively, to reduce the possibility of the second corner guiding element 710 and the fourth corner guiding element 730 falling off the optical element driving mechanism 100.

[0154] The plurality of guiding spherical elements 750 and the plurality of guiding magnetic elements 760 are disposed between the base 230 and the second movable portion 320, which can ensure the movement of the second movable portion 320 relative to the fixed portion 200 in a plane perpendicular to the central axis C.

[0155] The position of the first movable portion 310 can be sensed by a position sensing assembly 800 when the first movable portion 310 moves relative to the fixed portion 200. The position sensing element 810 can be disposed adjacent to the first corner 2001. In some embodiments, the position sensing element 810 can be a Hall sensing element, a Giant Magneto Resistance (GMR) sensing element, a Tunneling Magneto Resistance (TMR) sensing element, etc.

[0156] The position sensing element 810 obtains the position of the first movable portion 310 by sensing the change of the magnetic field lines (including but not limited to the density and direction of the magnetic field lines) of the first side magnetic element 520. Because the second corner guiding element 710 and the fourth corner guiding element 730 guiding the first movable portion 310 and the position sensing element 810 sensing the position of the first movable portion 310 are disposed in different corners of the optical element driving mechanism 100, the space can be effectively utilized, and miniaturization can be achieved.

[0157] It is worth noting that the first side magnetic element 520 is simultaneously a driving magnetic element of the first driving assembly 500 and a reference magnetic element of the position sensing assembly 800. That is, a single magnetic element can have multiple functions, which can reduce the volume of the optical element driving mechanism 100 to achieve miniaturization.

[0158] Next, in addition to Figure 2 , reference is made to Figure 9 , Figure 10 , Figure 11 , Figure 12 to understand the circuit assembly 900. Figure 9 is a schematic diagram of the first side circuit element 910 and the third side circuit element 920 according to some embodiments. Figure 10 is a schematic diagram of the external circuit element 930 according to some embodiments. Figure 11 and Figure 12 are schematic diagrams of different perspectives of the base 230 and the circuit assembly 900 according to some embodiments.

[0159] The first side circuit element 910 is disposed on the first side 1001. The first side circuit element 910 can be a flexible printed circuit board. The first side circuit element 910 is electrically connected to the first driving assembly 500 and the embedded circuit 233 embedded in the base 230. The first side circuit element 910 includes a first side circuit element first portion 911, a first side circuit element second portion 912, a first side circuit element bending portion 913, and a first side circuit element protruding portion 914.

[0160] The first side circuit first portion 911 has a plate-like structure. The first side circuit first portion 911 is perpendicular to the central axis C. The first side circuit first portion 911 is disposed on the base 230. For example, the first side circuit first portion 911 can directly contact a first surface 235 of the base 230 facing the first side circuit element first portion 911 (only labeled in Figure 12 ).

[0161] Specifically, the first surface 235 of the base faces the second movable part 320. In some embodiments, when viewed in the direction along the vertical central axis C, the first surface 235 of the base is located between the center of the first movable part 310 and the bottom surface of the first side circuit element first portion 911. In other words, the center of the first movable part 310 is closer to the top wall 2121 of the housing 210 than the first surface 235 of the base, and the bottom surface of the first side circuit element first portion 911 is closer to the second movable part 320 than the first surface 235 of the base.

[0162] The second part 912 of the first-side circuit element has a plate-like structure. The second part 912 of the first-side circuit is substantially parallel to the central axis C. That is, the second part 912 of the first-side circuit is not parallel to the first part 911 of the first-side circuit. The second part 912 of the first-side circuit is disposed on the base 230. For example, the second part 912 of the first-side circuit can directly contact a side surface of the base 230 facing the second part 912 of the first-side circuit element (not shown). Specifically, the side surface of the base faces the first movable part 310.

[0163] The first drive assembly 500 is electrically connected to the first part 911 of the first side circuit element via the second part 912 of the first side circuit element. That is, the current flowing out of the first drive assembly 500 first flows through the second part 912 of the first side circuit element and then flows into the first part 911 of the first side circuit element.

[0164] The first-side coil 510 includes an outer surface 515 of the first-side coil facing the second portion 912 of the first-side circuit element (only indicated on the outer surface). Figure 2 When viewed along a direction perpendicular to the central axis C, the outer surface 515 of the first-side coil at least partially overlaps with the first portion 911 of the first-side circuit element. Furthermore, when viewed along the direction perpendicular to the central axis C, the center of the outer surface 515 of the first-side coil is located between the position sensing element 810 and the second corner guide element 710. In other words, the position sensing element 810 is closer to the first corner 2001 than the center of the outer surface 515 of the first-side coil, and the second corner guide element 710 is closer to the second corner 2002 than the center of the outer surface 515 of the first-side coil.

[0165] The bent portion 913 of the first-side circuit element can connect the first part 911 of the first-side circuit element and the second part 912 of the first-side circuit element.

[0166] The first-side circuit element protrusion 914 has a plate-like structure. The first-side circuit element protrusion 914 is not parallel to the first portion 911 of the first-side circuit element but is parallel to the second portion 912 of the first-side circuit element. When viewed along the direction perpendicular to the central axis C, the first-side circuit element protrusion 914 and the second portion 912 of the first-side circuit element do not overlap. In some embodiments, a position sensing element 810 may be disposed on the first-side circuit element protrusion 914. Therefore, the position sensing assembly 800 may be electrically connected to the first portion 911 of the first-side circuit element via the first-side circuit element protrusion 914.

[0167] The third side circuit element 920 is disposed on the third side 1003. The third side circuit element 920 can be a flexible printed circuit board. The third side circuit element 920 comprises a third side circuit element first portion 921, a third side circuit element second portion 922, and a third side circuit element bending portion 923, which are similar to the first side circuit element first portion 911, the first side circuit element second portion 912, and the first side circuit element bending portion 913, respectively.

[0168] The main difference between the third side circuit element 920 and the first side circuit element 910 is that the third side circuit element 920 can not have a third side circuit element protruding portion. This is because in the present application only one position sensing element (e.g., the position sensing element 810 described above) can be needed to sense the movement of the first movable part 310 relative to the fixed part 200 along the central axis C, and thus only one circuit element protruding portion for disposing the position sensing element is needed.

[0169] The first side circuit element 910 is electrically connected to an external circuit via an external circuit element 930. The external circuit element 930 comprises an external circuit element first portion 931, an external circuit element second portion 932, an external circuit element third portion 933, and an external circuit element movable portion 934.

[0170] The external circuit element first portion 931 has a plate-like structure. The external circuit element first portion 931 is parallel to the central axis C. The external circuit element first portion 931 is disposed on the first side 1001. The external circuit element first portion 931 can have a plurality of pins 9311 for electrically connecting to the external circuit. Because the pins 9311 are located on the same side as the first side magnetic element 520, the optical element driving mechanism 100 can be conveniently disposed together with other optical element driving mechanisms and / or other optical modules in an electronic device, and the magnetic interference can be reduced.

[0171] The external circuit element second portion 932 has a plate-like structure. The external circuit element second portion 932 is perpendicular to the central axis C. The external circuit element second portion 932 is not parallel to the external circuit element first portion 931. In some embodiments, the external circuit element second portion 932 is perpendicular to the external circuit element first portion 931. In some embodiments, the external circuit element second portion 932 is parallel to the first side circuit element first portion 911.

[0172] The external circuit element second portion 932 is electrically connected to the external circuit via the external circuit element first portion 931. That is, the current flowing from the external circuit first flows through the external circuit element first portion 931 and then flows into the external circuit element second portion 932.

[0173] The second part 932 of the external circuit element is disposed on the first side 1001. The second part 932 of the external circuit element is disposed on the base 230. For example, the second part 932 of the external circuit element can directly contact a second base surface 236 of the base 230 facing the second part 932 of the external circuit element (only labeled in Figure 11 ).

[0174] In particular, the second base surface 236 faces the top wall 2121 of the housing 210. In some embodiments, the second base surface 236 is located between the center of the first movable part 310 and the first base surface 235 when viewed along the direction of the vertical central axis C. In other words, the center of the first movable part 310 is closer to the top wall 2121 of the housing 210 than the second base surface 236, and the first base surface 235 is closer to the second movable part 320 than the second base surface 236.

[0175] The third part 933 of the external circuit element has a plate-like structure. The third part 933 of the external circuit element is not parallel to the first part 931 of the external circuit element and the second part 932 of the external circuit element. The third part 933 of the external circuit element is disposed on the second side 1002. The third part 933 of the external circuit element is disposed on the second movable part 320. For example, the third part 933 of the external circuit element can directly contact a second movable part outer surface (not labeled) of the second movable part 320 facing the third part 933 of the external circuit element.

[0176] The movable part 934 of the external circuit element connects the first part 931 of the external circuit element and the third part 933 of the external circuit element. In some embodiments, the movable part 934 of the external circuit element surrounds the second corner 2002. In some embodiments, the movable part 934 of the external circuit element can not contact any other element. That is, the movable part 934 of the external circuit element is suspended.

[0177] In some embodiments, the first base surface 235 and the second base surface 236 are located between the second part 932 of the external circuit element and the first part 911 of the first side circuit element when viewed along the direction of the vertical central axis C. In other words, the first base surface 235 and the second base surface 236 are sandwiched between the external circuit element 930 and the first side circuit element 910.

[0178] Next, please refer to Figures 13 to 19 to understand some other features of the optical element driving mechanism 100, such as the positional relationship between elements, circuit connection mode, etc. Figure 13 、 Figure 14 、 Figure 15 are perspective views of the optical element driving mechanism 100 from different angles, omitting the housing 210. Figure 16is a top view of the optical element driving mechanism 100 omitting the housing 210. Figure 17 and Figure 18 is a perspective view of the optical element driving mechanism 100 omitting the housing 210, the fixing element 220, and the second movable part 320. Figure 19 is a sectional view of the optical element driving mechanism 100 omitting the housing 210.

[0179] The first-side circuit element first portion 911 can include a first-side circuit element electrical connection portion 9111. The first-side circuit element first portion 911 is electrically connected to the embedded circuit of the base 230 via the first-side circuit element electrical connection portion 9111. Specifically, a solder material (e.g., a solder ball) can be applied on the first-side circuit element electrical connection portion 9111, such that the first-side circuit element electrical connection portion 9111 serves as a soldering point. In this way, the first-side circuit element 910 is electrically connected at the base first surface 235 of the base 230.

[0180] The external circuit element second portion 932 can include an external circuit element electrical connection portion 9321. The external circuit element second portion 932 is electrically connected to the embedded circuit of the base 230 via the external circuit element electrical connection portion 9321. Specifically, a solder material (e.g., a solder ball) can be applied on the external circuit element electrical connection portion 9321, such that the external circuit element electrical connection portion 9321 serves as a soldering point. In this way, the external circuit element 930 is electrically connected at the base second surface 236 of the base 230.

[0181] In some embodiments, the first-side circuit element electrical connection portion 9111 and the external circuit element electrical connection portion 9321 do not overlap when viewed along the direction of the vertical central axis C. That is, the first-side circuit element electrical connection portion 9111 and the external circuit element electrical connection portion 9321 are located at different horizontal levels.

[0182] In summary, the first-side circuit element 910 is electrically connected to the embedded circuit of the base 230 and the first driving assembly 500 at the base first surface 235 of the base 230 via the first-side circuit element electrical connection portion 9111, and the external circuit element 930 is electrically connected to the embedded circuit of the base 230 at the base second surface 236 of the base 230 via the external circuit element electrical connection portion 9321. Thus, the circuit assembly 900 can achieve the function of an integrated circuit. In addition, due to the design of the first-side circuit element 910, the third-side circuit element 920, and the external circuit element 930, the circuit assembly 900 can facilitate assembly. For example, the first-side circuit element 910 and / or the third-side circuit element 920 can be installed from bottom to top.

[0183] In addition, asFigure 16 As shown, the end of one of the first elastic elements 410 may have a receiving structure that accommodates the end of another first elastic element 410, which can save materials and reduce waste. In some embodiments, a portion or all of the first elastic elements 410 may be exposed to facilitate electrical or physical connection with a third optical element.

[0184] like Figure 19 As shown, due to the presence of the elastic element 420, the movement of the first movable part 310 can be divided into a focusing segment and a non-focusing segment. When the first movable part 310 presses against the elastic element 420, the movement of the first movable part 310 is in the non-focusing segment.

[0185] In summary, this invention provides an optical element driving mechanism that drives different optical elements through different driving components. The driving components can provide relatively large driving force, thus allowing for the use of larger or heavier optical elements. The circuit assembly includes multiple circuit elements, achieving integrated circuit functionality. Furthermore, the circuit assembly is easy to assemble. In addition, the elastic component includes a spring-loaded elastic element. Moreover, the arrangement of the components effectively utilizes space and achieves miniaturization.

[0186] The foregoing overview of several embodiments provides a better understanding of various aspects of this invention for those skilled in the art. It should be understood by those skilled in the art that this invention can be readily used as the basis for designing or modifying other processes and structures to achieve the same objectives or advantages as the embodiments described herein. It should be understood by those skilled in the art that such equivalent configurations do not depart from the spirit and scope of this invention, and that various changes, substitutions, and modifications can be made to this invention without departing from its spirit and scope. Furthermore, features from different embodiments can be freely mixed and matched as long as they do not violate or conflict with the spirit of this invention.

Claims

1. An optical element driving mechanism having a center axis, characterized by, Comprising: a fixed part comprising a base; a first movable part connected to a first optical element and movable relative to the base; a first driving assembly driving the first movable part to move relative to the base; and a springing elastic element dividing a movement range of the first movable part into a focusing section and a non-focusing section. Further comprising a first side circuit element electrically connected to the first driving assembly, wherein the base comprises an embedded circuit, and the first side circuit element comprises:

2. The optical element drive mechanism according to claim 1, wherein a first side circuit element first part having a plate-like structure and disposed on the base, wherein the first side circuit element first part comprises a first side circuit element electrical connection part, and the first side circuit element first part is electrically connected to the embedded circuit of the base via the first side circuit element electrical connection part, wherein the base comprises a base first surface facing the first side circuit element first part, and the base first surface is located between a center of the first movable part and the first side circuit element first part when viewed along a direction perpendicular to the central axis. The first side circuit element further comprises:

3. The optical element drive mechanism according to claim 2, wherein a first side circuit element second part having a plate-like structure and non-parallel to the first side circuit element first part; and a first side circuit element bending part connecting the first side circuit element first part and the first side circuit element second part, wherein the first driving assembly is electrically connected to the first side circuit element first part via the first side circuit element second part; wherein the first driving assembly comprises a first side coil comprising a first side coil outer surface facing the first side circuit element second part, and the first side coil outer surface at least partially overlaps the first side circuit element first part when viewed along a direction perpendicular to the central axis. The first side circuit element further comprises:

4. The optical element drive mechanism according to claim 3, wherein a first side circuit element protruding part having a plate-like structure, non-parallel to the first side circuit element first part and parallel to the first side circuit element second part, wherein the first side circuit element protruding part does not overlap the first side circuit element second part when viewed along a direction perpendicular to the central axis. Further comprising a position sensing assembly for sensing a movement of the first movable part, wherein the position sensing assembly comprises a position sensing element disposed on the first side circuit element protruding part, and the position sensing assembly is electrically connected to the first side circuit element first part via the first side circuit element protruding part.

5. The optical element drive mechanism according to claim 4, wherein Further comprising a guiding assembly guiding the first movable part to move relative to the base and a position sensing element sensing a movement of the first movable part, wherein the guiding assembly comprises a second corner guiding element, and a center of the first side coil outer surface is located between the position sensing element and the second corner guiding element when viewed along a direction perpendicular to the central axis.

6. The optical element drive mechanism according to claim 3, wherein Further comprising an external circuit element, wherein the first side circuit element is electrically connected to an external circuit via the external circuit element, and the external circuit element comprises:

7. The optical element drive mechanism according to claim 2, wherein ​ a pair of outer circuit element first portions having plate-like structures; and a pair of outer circuit element second portions having plate-like structures and being non-parallel to the pair of outer circuit element first portions, wherein the pair of outer circuit element second portions includes a pair of outer circuit element electrically connecting portions, and the pair of outer circuit element second portions electrically connects the embedded circuit of the base via the pair of outer circuit element electrically connecting portions, wherein the pair of outer circuit element second portions electrically connects the external circuit via the pair of outer circuit element first portions, wherein the pair of outer circuit element second portions is parallel to the pair of first side circuit element first portions.

8. The optical element drive mechanism according to claim 7, wherein The first surface of the base is located between the pair of first side circuit element first portions and the pair of outer circuit element second portions when viewed along a direction perpendicular to the central axis, and the pair of first side circuit element electrically connecting portions and the pair of outer circuit element electrically connecting portions are non-overlapped when viewed along a direction perpendicular to the central axis.

9. The optical element drive mechanism according to claim 7, wherein The first movable portion further includes a second movable portion connected to a second optical element, wherein the pair of outer circuit element further includes: a pair of outer circuit element third portions having plate-like structures and being non-parallel to the pair of outer circuit element first portions and the pair of outer circuit element second portions; and a pair of outer circuit element movable portions connected to the pair of outer circuit element third portions, wherein the base is disposed between the first movable portion and the second movable portion, and the pair of outer circuit element third portions is disposed in the second movable portion.

10. The optical element drive mechanism according to Claim 1, wherein The fixed portion further includes a housing and a fixed element disposed between the housing and the first movable portion and at least partially covering a top surface of the first movable portion and a top surface of the base.

Images