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 connecting the first optical element and can move relative to the fixed part. The first driving assembly is used for driving the first movable part to move relative to the fixed part.

Description

Technical Field

[0001] The present disclosure relates to an optical element driving mechanism. Background Art

[0002] With the development of technology, many current electronic devices (such as smart phones or digital cameras) have functions of taking pictures or videos. The use of these electronic devices is becoming more and more common, and they are developing towards the design direction of convenience, thinness and lightness to provide users with more choices.

[0003] The aforementioned electronic devices with functions of taking pictures or videos usually are provided with an optical element driving mechanism to drive an optical element (such as a lens) to move along the optical axis, so as to achieve functions of auto focus (AF) or optical image stabilization (OIS). Light can pass through the aforementioned optical element to form an image on the photosensitive element. However, the current trend of mobile devices is to have a smaller volume and higher durability. Therefore, how to effectively reduce the size of the optical element driving mechanism and improve its durability has become an important issue. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide an optical element driving mechanism to solve at least one of the above problems.

[0005] An embodiment of the present disclosure provides an optical element driving mechanism, including a fixed part, a first movable part and a driving assembly. The first movable part is used for connecting a first optical element and can move relative to the fixed part. The first driving assembly is used for driving the first movable part to move relative to the fixed part.

[0006] In some embodiments, the fixing part includes a base. The base has a first recess, a second recess, and a first base surface. The first recess and the second recess are recessed from the first base surface. The first recess has a bottom surface of the first recess. The second recess has a bottom surface of the second recess. The second recess surrounds the first recess. The bottom surface of the first recess is parallel to the bottom surface of the second recess. The first base surface is parallel to the bottom surface of the second recess. There is a spacing between the first base surface and the bottom surface of the second recess. The spacing is less than 0.1 mm. The first recess also has a first side surface and a second side surface. The first side surface and the second side surface are not parallel. The first side surface is not parallel to the bottom surface of the first recess. The second side surface is not parallel to the bottom surface of the first recess. The optical element driving mechanism further includes a connection assembly. The connection assembly includes a first connection element. The first movable part includes a third recess. The first connection element is disposed in the first recess and the third recess. The third recess includes a bottom surface of the third recess. The bottom surface of the third recess is parallel to the bottom surface of the first recess. The first connection element directly contacts the first side surface, the second side surface, and the bottom surface of the third recess. The first connection element is spaced apart from the bottom surface of the first recess.

[0007] In some embodiments, the first movable part further includes a fourth recess, a fifth recess, and a first recess structure. The connection assembly further includes a second connection element and a third connection element. The base further includes a sixth recess and a seventh recess. The second connection element is disposed in the fourth recess and the sixth recess. The third connection element is disposed in the fifth recess and the seventh recess. The optical element driving mechanism further includes a first sensing element and an auxiliary magnetic element disposed in the fixing part. The distance between the first sensing element and the fourth recess is less than the distance between the first sensing element and the third recess. The distance between the auxiliary magnetic element and the fourth recess is less than the distance between the auxiliary magnetic element and the third recess.

[0008] In some embodiments, the fixing part further includes an outer frame. The outer frame includes an opening. The optical element driving mechanism further includes a second movable part, an elastic element, and a buffer element. The elastic element is disposed between the fixing part and the second movable part. The buffer element is disposed between the fixing part and the second movable part. The first movable part and the second movable part are arranged along a first axis. A second axis is perpendicular to the first axis. In the direction of extension of the second axis, the elastic element and the buffer element at least partially overlap. In the direction of extension of the second axis, the first recess structure and the third recess at least partially overlap. When observed along the first axis, the elastic element and the buffer element do not overlap. In the direction of extension of the first axis, the elastic element and the second buffer element at least partially overlap.

[0009] In some embodiments, the second movable part is used to connect the second optical element. The second movable part includes a main body and a first side wall. The first side wall extends from the main body. The first side wall has a first groove, a second groove, and a first support part. The first groove is adjacent to the second groove. The first groove has a first groove surface. The second groove has a second groove surface. The first groove surface is adjacent to the second groove surface. The first groove surface and the second groove surface are not parallel. The first groove surface and the second groove surface have different slopes. The first support part extends from the first side wall along a third axis. The third axis is not parallel to the first axis. The third axis is not parallel to the second axis.

[0010] In some embodiments, the main body includes a main body surface, a second support part, and a third support part. The main body surface faces the second optical element. The second support part protrudes from the main body surface. The third support part protrudes from the main body surface. The second support part extends along the third axis. The third support part extends along the third axis. The second support part is located on a first side edge of the main body surface. The third support part is located on a second side edge of the main body surface. The first side edge and the second side edge are opposite. The third axis is perpendicular to the first axis. The third axis is perpendicular to the second axis.

[0011] In some embodiments, the fixing part further includes a first reinforcing element and a second reinforcing element, which are arranged on the base. The base further includes a second base surface. The first reinforcing element includes a first reinforcing element surface. The second reinforcing element includes a second reinforcing element surface. The first reinforcing element surface is parallel to the second reinforcing element surface. The first reinforcing element surface is parallel to the second base surface. In the direction of the second axis extension, there is a first height difference between the second base surface and the second reinforcing element surface. In the direction of the second axis extension, there is a second height difference between the first reinforcing element surface and the second reinforcing element surface. Both the first height difference and the second height difference are greater than zero. The second reinforcing element surface is located between the second base surface and the first reinforcing element surface. The second support part is located in an intermediate section of the first side edge.

[0012] In some embodiments, the optical element driving mechanism further includes a second sensing element. In the direction of the second axis extension, the second sensing element at least partially overlaps with the first reinforcing element. The first reinforcing element and the second reinforcing element have different materials. The first reinforcing element and the second reinforcing element have different magnetic permeabilities. The first reinforcing element has a first thickness. The second reinforcing element has a second thickness. The first thickness is different from the second thickness. When observed along the second axis, the first reinforcing element and the second reinforcing element do not overlap. The second reinforcing element is welded to the outer frame.

[0013] In some embodiments, the optical element driving mechanism further includes a circuit element and a first bonding element. The circuit element includes a first circuit element surface and a second circuit element surface. The first circuit element surface directly contacts the first reinforcing element and the second reinforcing element. The second circuit element surface directly contacts the base. The first circuit element surface is opposite to the second circuit element surface. The first bonding element is disposed on the first circuit element surface and the second circuit element surface. The magnetic permeability of the first reinforcing element is greater than that of the second reinforcing element. The first thickness is less than the second thickness.

[0014] In some embodiments, when observed along the third axis, the base includes a second recessed structure, a first positioning element, a second positioning element, and a third positioning element. The optical element driving mechanism further includes a second bonding element and a third bonding element. The second bonding element is disposed between the base and the circuit element. The third bonding element is disposed in the second recessed structure. The third bonding element directly contacts the first positioning element. The third bonding element directly contacts the second positioning element. The third bonding element directly contacts the third positioning element. The third bonding element directly contacts the second bonding element. When observed along the third axis, the circuit element does not overlap with the first positioning element, the second positioning element, and the third positioning element. When observed along the third axis, the outer frame does not overlap with the first positioning element and the second positioning element. When observed along the third axis, the outer frame at least partially overlaps with the third positioning element. When observed along the first axis, the base further includes a protrusion exposed outside the outer frame. The protrusion includes a first protrusion surface and a second protrusion surface exposed outside the outer frame. The slope of the first protrusion surface is different from the slope of the second protrusion surface.

[0015] The beneficial effects of the present utility model are as follows. The special relative positions and size relationships of the elements disclosed in the present disclosure can not only make the driving mechanism thinner in a specific direction and smaller as a whole, but also further improve the optical quality of the system (such as shooting quality or depth sensing accuracy, etc.) by cooperating with different optical modules. Furthermore, a multiple anti-vibration system is achieved by using each optical module to greatly improve the anti-shake effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be noted that, according to the standard practice in the industry, various features are not shown to scale and are only used for illustration. In fact, the dimensions of the elements may be arbitrarily enlarged or reduced to clearly show the features of the present disclosure.

[0017] Figure 1A is a schematic diagram of an optical element driving mechanism.

[0018] Figure 1B is an exploded view of the optical element driving mechanism.

[0019] Figure 1CIt is a top view of the optical element driving mechanism.

[0020] Figure 1D It is a side view of the optical element driving mechanism.

[0021] Figure 1E It is a schematic diagram of the optical element driving mechanism.

[0022] Figure 2A It is a sectional view taken along line A-A of Figure 1C .

[0023] Figure 2B It is Figure 2A an enlarged view of the area of.

[0024] Figure 2C It is a sectional view taken along line B-B of Figure 1C .

[0025] Figure 2D It is Figure 2C an enlarged view of the area of.

[0026] Figure 2E It is Figure 2C an enlarged view of the area of.

[0027] Figure 2F It is a sectional view taken along line C-C of Figure 1C .

[0028] Figure 2G It is a sectional view taken along line D-D of Figure 1C .

[0029] Figure 2H It is a sectional view taken along line E-E of Figure 1C ,

[0030] Figure 3 It is a schematic diagram of some components of the optical element driving mechanism.

[0031] Figure 4 It is a schematic diagram of some components of the optical element driving mechanism.

[0032] Figure 5A 、 Figure 5B It is a schematic diagram of the second moving part and the second optical element when viewed from different directions.

[0033] Figure 5C It is a sectional view taken along the line of Figure 5B .

[0034] Figure 6A It is a bottom view of the optical element driving mechanism.

[0035] Figure 6B It is alongFigure 6A The sectional view shown by the line G-G.

[0036] Figure 6C is Figure 6B An enlarged view of the area.

[0037] Figure 7 Is a bottom view of the optical element driving mechanism of another embodiment of the present disclosure.

[0038] Figure 8A 、 Figure 8B 、 Figure 8C Are schematic diagrams of some components of the optical element driving mechanism.

[0039] The reference numerals are as follows:

[0040] 1000: Optical element driving mechanism

[0041] 1100: Fixed part

[0042] 1110: Outer frame

[0043] 1111: Opening

[0044] 1120: Base

[0045] 1121: First recess

[0046] 1122: Second recess

[0047] 1123: Bottom surface of the first recess

[0048] 1124: Bottom surface of the second recess

[0049] 1125: First base surface

[0050] 1126: First side

[0051] 1127: Second side

[0052] 1128: Second base surface

[0053] 1130: Protrusion

[0054] 1131: First protrusion surface

[0055] 1132: Second protrusion surface

[0056] 1141: Sixth recess

[0057] 1142: Seventh recess

[0058] 1151: First positioning element

[0059] 1152: Second positioning element

[0060] 1153: Third positioning element

[0061] 1154: Second recessed structure

[0062] 1210: First movable part

[0063] 1211: Third recessed part

[0064] 1212: Fourth recessed part

[0065] 1213: Fifth recessed part

[0066] 1214: First recessed structure

[0067] 1215: Bottom surface of the third recessed part

[0068] 1220: Second movable part

[0069] 1221: Main body

[0070] 1222: Main body surface

[0071] 1223: First side wall

[0072] 1224: First support part

[0073] 1225: Second support part

[0074] 1226: Third support part

[0075] 1227: First side

[0076] 1228: Second side

[0077] 1229: First side wall surface

[0078] 1231: First groove

[0079] 1232: Second groove

[0080] 1233: First groove surface

[0081] 1234: Second groove surface

[0082] 1310: First driving component

[0083] 1311: First magnetic element

[0084] 1312: First magnetic element

[0085] 1320: Second driving component

[0086] 1321: Second magnetic element

[0087] 1322: Second driving coil

[0088] 1323: Third magnetic element

[0089] 1324: Third drive coil

[0090] 1330: Auxiliary magnetic element

[0091] 1341: First sensing element

[0092] 1342: Second sensing element

[0093] 1400: Connection component

[0094] 1401: First connection element

[0095] 1402: Second connection element

[0096] 1403: Third connection element

[0097] 1410,1410’: First reinforcement element

[0098] 1411: Surface of the first reinforcement element

[0099] 1420: Second reinforcement element

[0100] 1421: Surface of the second reinforcement element

[0101] 1431: First bonding element

[0102] 1432: Second bonding element

[0103] 1433: Third bonding element

[0104] 1510: Circuit element

[0105] 1511: Surface of the first circuit element

[0106] 1512: Surface of the second circuit element

[0107] 1520: Elastic element

[0108] 1530: Intermediate element

[0109] 1540: First buffer element

[0110] 1541: Second buffer element

[0111] 1551: First strengthening element

[0112] 1552: Second strengthening element

[0113] 1810: First optical element

[0114] 1820: Second optical element

[0115] 1901: First axis

[0116] 1902: Second axis

[0117] 1903: Third axis

[0118] 1911, 1912, 1913, 1914: Distance

[0119] 1915: Spacing

[0120] 1921, 1922, 1923, 1924: Region

[0121] 1931: First height difference

[0122] 1932: Second height difference

[0123] 1933: First thickness

[0124] 1934: Second thickness

[0125] X, Y, Z: Coordinates Detailed implementation mode

[0126] Many different implementation methods or examples are disclosed below to implement different features of the provided subject matter. The following describes embodiments of specific components and their arrangements to illustrate the present disclosure. Of course, these embodiments are only for illustration and should not limit the scope of the present disclosure. For example, in the specification, it is mentioned that a first feature component is formed on a second feature component, which may include an embodiment where the first feature component and the second feature component are in direct contact, and may also include an embodiment where there are other features between the first feature component and the second feature component. In other words, the first feature component and the second feature component are not in direct contact.

[0127] In addition, repeated reference numerals or labels may be used in different embodiments. These repetitions are only for simplicity and clarity in describing the present disclosure and do not represent a specific relationship between the different embodiments and / or structures being discussed. In addition, forming, connecting to, and / or coupling to another feature component above another feature component in the present disclosure may include embodiments where the feature components are formed in direct contact, and may also include embodiments where additional feature components may be formed between the above-mentioned feature components such that the above-mentioned feature components may not be in direct contact. In addition, spatial-related terms may be used, such as "vertical", "above", "on", "under", "bottom", and similar terms (such as "downwardly", "upwardly", etc.). These spatial-related terms are for facilitating the description of the relationship between one (or more) element or feature and another (or more) element or feature in the drawings. These spatial-related terms are intended to cover different orientations of the device including the features.

[0128] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It is understood that such terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the background or context of this disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined herein.

[0129] Furthermore, the ordinal numbers such as "first", "second", etc. used in the specification and claims to modify elements of the claims do not themselves imply or represent any prior ordinal number of the claimed element, nor do they represent the order of one claimed element and another claimed element, or the order in the manufacturing method. The use of multiple ordinal numbers is only used to clearly distinguish one claimed element with a certain name from another claimed element with the same name.

[0130] In addition, in some embodiments of the present disclosure, terms related to joining and connecting, such as "connect", "interconnect", etc., unless specifically defined, may refer to two structures being in direct contact, or may also refer to two structures not being in direct contact, with other structures disposed between the two structures. And such terms related to joining and connecting may also include the cases where both structures are movable, or both structures are fixed.

[0131] Embodiments of the present disclosure provide an optical element driving mechanism for driving an optical element to move. For example, Figure 1A is a schematic diagram of the optical element driving mechanism 1000. Figure 1B is an exploded view of the optical element driving mechanism 1000. Figure 1C is a top view of the optical element driving mechanism 1000. Figure 1D is a side view of the optical element driving mechanism 1000. Figure 1E is a schematic diagram of the optical element driving mechanism 1000.

[0132] As Figures 1A to 1E shown, the optical element driving mechanism 1000 mainly includes a fixed part 1100 (including an outer frame 1110 and a base 1120), a first movable part 1210, a second movable part 1220, a first driving component 1310, a second driving component 1320, a connecting component 1400, a circuit element 1510, an elastic element 1520, an intermediate element 1530, and a first strengthening element 1551, for driving the first optical element 1810 and the second optical element 1820 to move.

[0133] In some embodiments, the foregoing first optical element 1810 and second optical element 1820 may be, for example, a lens, a mirror, a prism, a reflective polished surface, an optical coating, a beam splitter, an aperture, a liquid lens, an image sensor, a camera module, a ranging module, etc. It should be noted that the definition of the optical element here is not limited to the element related to visible light, and the element related to invisible light (such as infrared light, ultraviolet light, etc.) may also be included in the present disclosure.

[0134] In some embodiments, the outer frame 1110 and the base 1120 may be combined with each other to form the housing of the optical element driving mechanism 1000, and other elements of the optical element driving mechanism 1000 may be disposed in the housing formed by the outer frame 1110 and the base 1120 to protect other elements. For example, the base 1120 may be fixedly connected to the outer frame 1110. The first optical element 1810 and the second optical element 1820 disposed in the optical element driving mechanism 1000 are focused with an image sensor (not shown). In some embodiments, the outer frame 1110 may have an opening 1111, and a part of the second optical element 1820 may be exposed when observed along the Z-axis, so as to allow light to enter the optical element driving mechanism 1000 from the opening 1111 and reach the second optical element 1820. Then, the second optical element 1820 may change the direction of the light so that the light reaches the first optical element 1810 and thus reaches the image sensor (not shown).

[0135] In some embodiments, the first movable portion 1210 and the second movable portion 1220 may be disposed in the fixed portion 1100 and are respectively used to connect the first optical element 1810 and the second optical element 1820. For example, the first movable portion 1210 may have a through hole, and the first optical element 1810 may be fixed in this through hole to allow the first optical element 1810 to move relative to the fixed portion 1100 together with the first movable portion 1210. The second optical element 1820 may also be disposed on the second movable portion 1220 and move relative to the fixed portion together with the second movable portion 1220. In addition, the first optical element 1810 and the second optical element 1820 may also move relative to each other.

[0136] In some embodiments, the first driving component 1310 can be used to drive the first movable part 1210 to move relative to the fixed part 1100, and the second driving component 1320 can be used to drive the second movable part 1220 to move relative to the fixed part 1100, so as to achieve the effect of autofocus (AF) or optical image stabilization (OIS).

[0137] In some embodiments, the connecting component 1400 can be disposed between the first movable part 1210 and the fixed part 1100 to movably connect the first movable part 1210 to the fixed part 1100.

[0138] In some embodiments, the circuit element 1510 is, for example, a flexible printed circuit (FPC). The first driving component 1310 and the second driving component 1320 can be fixed to the circuit element 1510 by an adhesion method, and the circuit element 1510 can be disposed between the fixed part 1100 and the movable part 1200.

[0139] In this embodiment, the circuit element 1510 is electrically connected to other electronic components disposed inside or outside the optical element driving mechanism 1000, so as to control the movement of the first movable part 1210 and the second movable part 1220 on the X, Y, and Z axes, and further realize the functions of autofocus (AF) or optical image stabilization (OIS).

[0140] In some embodiments, the elastic element 1520 can, for example, include a metal material, and the intermediate element 1530 can include a spherical surface to movably connect the fixed part 1100 and the second movable part 1220, thereby allowing the second movable part 1220 and the second optical element 1820 disposed on the second movable part 1220 to move relative to the fixed part 1100.

[0141] In some embodiments, as Figure 1D 、 Figure 1E shown, when observing along the X axis, the base 1120 includes a protruding portion 1130 that is exposed outside the outer frame 1110. The protruding portion 1130 can include a first protruding surface 1131 and a second protruding surface 1132 that are exposed outside the outer frame 1110, and the slopes of the first protruding surface 1131 and the second protruding surface 1132 are different, so as to allow the outer frame 1110 to be more conveniently assembled with the base 1120.

[0142] Figure 2A is a sectional view taken along the line A-A of Figure 1C , and Figure 2B is Figure 2A an enlarged view of the region 1921 ofFigure 2C is a cross-sectional view shown along line B-B of Figure 1C , while Figure 2D is Figure 2C an enlarged view of region 1922 of Figures 2A to 2D . As shown, the base 1120 may include a first recess 1121 and a second recess 1122, and the first movable portion 1210 may include a third recess 1211. The third recess 1211 may be opposite to the first recess 1121 and the second recess 1122, for example, at least partially overlapping on the Z axis, and may be used to accommodate the first connecting element 1401 of the connecting assembly 1400. That is, the first connecting element 1401 may be disposed in the first recess 1121 and the third recess 1211 to movably connect the first movable portion 1210 to the fixed portion 1100 (such as the base 1120).

[0143] In some embodiments, the first recess 1121 and the second recess 1122 may be recessed from the first base surface 1125 of the base 1120, and the second recess 1122 may surround the first recess 1121. Specifically, the first recess 1121 may have a first recess bottom surface 1123, the second recess 1122 may have a second recess bottom surface 1124, and the first recess bottom surface 1123, the second recess bottom surface 1124, and the first base surface 1125 may be parallel to each other, for example, all having a normal vector parallel to the Z axis.

[0144] In some embodiments, there may be a spacing 1915 between the first recess bottom surface 1123 and the second recess bottom surface 1124. The spacing 1915 may be less than 0.1 mm and greater than 0 mm, for example, 0.01 mm, 0.03 mm, etc. In some embodiments, a lubricating material (not shown) may be provided on each element of the connecting assembly 1400 (such as the first connecting element 1401) to reduce the friction between the connecting assembly 1400 and the base 1120 and the first movable portion 1210, and the second recess bottom surface 1124 may be used to accommodate the excess lubricating material to prevent the excess lubricating material from overflowing.

[0145] In some embodiments, the first recess 1121 may further include a first side surface 1126 and a second side surface 1127, connecting the bottom surface 1123 of the first recess and the bottom surface 1124 of the second recess, and the first connecting element 1401 may directly contact the first side surface 1126 and the second side surface 1127 without contacting the bottom surface 1123 of the first recess and the bottom surface 1124 of the second recess. In some embodiments, the first side surface 1126 and the second side surface 1127 are not parallel to the bottom surface 1123 of the first recess. In some embodiments, the third recess 1211 may have a third recess bottom surface 1215, which is parallel to the bottom surface 1123 of the first recess and directly contacts the first connecting element 1401. With this configuration, the position of the first connecting element 1401 relative to the base 1120 in the Y direction can be fixed, and since the first movable part 1210 is connected to the first connecting element only by the third recess bottom surface 1215, the position of the first movable part 1210 relative to the first connecting element 1401 in the Y direction is adjustable, which can avoid the influence of production tolerances on the assembly of each element.

[0146] Figure 2E Yes Figure 2C An enlarged view of the region 1923. As Figure 2E shown, a second adhesive element 1432 may also be provided between the circuit element 1510 and the base 1120 to fix the relative positions of the circuit element 1510 and the base 1120.

[0147] Figure 2F Is along Figure 1C The sectional view taken along the line C-C shown. As Figure 2F shown, the first movable part 1210 and the second movable part 1220 may be arranged along the first axis 1901, and the opening 1111 and the second optical element 1820 may be arranged along the second axis 1902, and the first axis 1901 and the second axis 1902 may not be parallel to each other, for example, may be perpendicular to each other. That is to say, when the external light reaches the second optical element 1820 from the opening 1111 along the second axis 1902, the second optical element 1820 can change the direction of the light so that the light reaches the first optical element 1810 along the first axis 1901. Thus, the size of the optical element driving mechanism along the second axis 1902 can be reduced, and miniaturization can be achieved.

[0148] In some embodiments, an elastic element 1520 may be disposed between the second movable part 1220 and the base 1120 to movably connect the second movable part 1220 and the base 1120. A second strengthening element 1552 may be disposed in the second movable part 1220, for example, embedded in the second movable part 1220 and may have a different material from the second movable part 1220. For example, the material of the second movable part 1220 may include plastic, while the material of the second strengthening element 1552 may include metal. The material of the first strengthening element 1551 may also include metal.

[0149] In some embodiments, an intermediate element 1530 may be disposed between the first strengthening element 1551 and the second strengthening element 1552, may move relative to one of them, and be fixed relative to the other. For example, the intermediate element 1530 may be fixed to the second strengthening element 1552 and may move relative to the first strengthening element 1551, or may be fixed to the first strengthening element 1551 and may move relative to the second strengthening element 1552, depending on the design requirements. Thereby, the second movable part 1220 may be movably connected to the fixed part 1100, and the friction between the second movable part 1220 and the fixed part 1100 may be reduced. In some embodiments, the material of the intermediate element 1530 may include ceramics. In some embodiments, the hardness of the intermediate element 1530 may be greater than the hardness of the first strengthening element 1551 and the second strengthening element 1552 to have better durability.

[0150] Figure 2G is the sectional view shown along the Figure 1C section line D-D. As Figure 2A 、 Figure 2C 、 Figure 2G shown, the first movable part 1210 may further have a fourth recess 1212 and a fifth recess 1213, and the base 1120 may further have a sixth recess 1141 and a seventh recess 1142. The connection assembly 1400 may further include a second connection element 1402 and a third connection element 1403. The second connection element 1402 may be disposed in the fourth recess 1212 and the sixth recess 1141, and the third connection element 1403 may be disposed in the fifth recess 1213 and the seventh recess 1142 to reduce the friction when the first movable part 1210 moves relative to the base 1120. In addition, a second buffer element 1541 may be disposed between the first movable part 1210 and the base 1120 to absorb shock and reduce abnormal noise, and may also protect the first movable part 1210 from damage. The second buffer element 1541 may include a soft material, for example.

[0151] As Figure 2A 、 Figure 2CAs shown, when viewed along the X-axis, the shapes of the third recess 1211 and the fourth recess 1212 may be different from each other. For example, the fourth recess 1212 may have a substantially V-shaped cross-section, thereby restricting the position of the second connecting element 1402 relative to the first movable part 1210 on the Y-axis, different from that the third recess 1211 allows the first connecting element 1401 to move relative to the first movable part 1210 on the Y-axis. The fifth recess 1213 may also have a structure similar to that of the fourth recess 1212, which will not be elaborated herein.

[0152] Figure 2H is a sectional view taken along Figure 1C section line E-E shown, while Figure 3 is a schematic view of some elements of the optical element driving mechanism 1000. In some embodiments, as Figure 2H 、 Figure 3 shown, the first recess 1121, the sixth recess 1141, and the seventh recess 1142 may have an elongated shape and may extend along the first axis 1901 (parallel to the X-axis). The third recess 1211, the fourth recess 1212, and the fifth recess 1213 may also extend along the first axis 1901. In addition, since the first connecting element 1401, the second connecting element 1402, and the third connecting element 1403 of the connecting assembly 1400 are respectively disposed in the first recess 1121, the sixth recess 1141, and the seventh recess 1142, and are respectively disposed in the third recess 1211, the fourth recess 1212, and the fifth recess 1213, it allows the first movable part 1210 to move relative to the fixed part 1100 in the direction in which the first axis 1901 extends, so as to achieve the effect of autofocus. In some embodiments, as Figure 3 shown, in the direction in which the first axis 1901 extends, the elastic element 1520 and the second buffer element 1541 at least partially overlap, so as to reduce the size of the optical element driving mechanism 1000 in other directions and achieve miniaturization.

[0153] In some embodiments, as Figure 2A 、 Figure 2C shown, the first driving assembly 1310 may include a first magnetic element 1311 and a first driving coil 1312, which are respectively disposed on the first movable part 1210 and the base 1120, or their positions may be interchanged depending on the design requirements. When the first driving coil 1312 is energized, the first magnetic element 1311 and the first driving coil 1312 may generate an electromagnetic force to drive the first movable part 1210 to move relative to the fixed part 1100.

[0154] In some embodiments, as Figure 2HAs shown, the second driving component 1320 may include a second magnetic element 1321, a second driving coil 1322, a third magnetic element 1323, and a third driving coil 1324. The second magnetic element 1321 and the third magnetic element 1323 may be disposed on the second movable portion 1220, while the second driving coil 1322 and the third driving coil 1324 may be disposed on the base 1120, or their positions may be interchanged depending on design requirements. When the second driving coil 1322 and the third driving coil 1324 are energized, electromagnetic driving forces may be generated between them and the second magnetic element 1321 and the third magnetic element 1323 respectively to drive the second movable portion 1220 to move relative to the fixed portion 1100.

[0155] In some embodiments, as Figure 2C shown, a first sensing element 1341 may be disposed in the first driving coil 1312, and the first sensing element 1341 may be disposed on the circuit element 1510 to sense the magnetic field change of the first magnetic element 1311, so as to obtain the position of the first movable portion 1210 relative to the fixed portion 1100. In some embodiments, the aforementioned first sensing element 1341 may include a Hall effect sensor, a magnetoresistance effect sensor (MR Sensor), a giant magnetoresistance effect sensor (GMR Sensor), a tunneling magnetoresistance effect sensor (TMR Sensor), or a fluxgate sensor.

[0156] In some embodiments, as Figure 2A shown, the first movable portion 1210 may further include a first recess structure 1214 that at least partially overlaps with the third recess portion 1211 in the Z-axis direction to reduce the weight of the first movable portion 1210. To balance both sides of the first movable portion 1210, in some embodiments, as Figure 2A , Figure 3 shown, an additional auxiliary magnetic element 1330 may be disposed on the fixed portion 1100 adjacent to the first magnetic element 1311 to provide an attractive force to stabilize the position of the first movable portion 1210 relative to the fixed portion 1100. In some embodiments, as Figure 2A , Figure 2CAs shown, the distance 1911 between the auxiliary magnetic element 1330 and the fourth recess 1212 is less than the distance 1912 between the auxiliary magnetic element 1330 and the third recess 1211, and the distance 1913 between the first sensing element 1341 and the fourth recess 1212 is less than the distance 1914 between the first sensing element 1341 and the third recess 1211. That is to say, the first sensing element 1341 and the auxiliary magnetic element 1330 can be relatively close to the fourth recess 1212 to obtain better sensing and attracting effects.

[0157] Figure 4 is a schematic diagram of some components of the optical element driving mechanism 1000. As Figure 2F 、 Figure 4 shown, the optical element driving mechanism 1000 may further include a first buffer element 1540 disposed between the fixed portion 1100 and the second movable portion 1220. The first buffer element 1540 may include, for example, a gel to absorb abnormal vibrations that may occur when the second movable portion 1220 moves relative to the fixed portion 1100. In addition, when viewed along the first axis 1901, the elastic element 1520 and the first buffer element 1540 do not overlap, and in the direction in which the second axis 1902 extends, the elastic element 1520 and the first buffer element 1540 may at least partially overlap to reduce the size in other directions and achieve miniaturization.

[0158] Figure 5A 、 Figure 5B are schematic diagrams of the second movable portion 1220 and the second optical element 1820 when viewed from different directions, and Figure 5C is a sectional view taken along the line Figure 5B shown. As Figures 5A to 5C shown, the second movable portion 1220 may include a main body 1221 and a first side wall 1223 extending from the main body 1221. The first side wall 1223 may have a first support portion 1224, and the main body surface 1222 of the main body 1221 may face the second optical element 1820, and a protruding second support portion 1225 and a third support portion 1226 may be provided on the main body surface 1222.

[0159] The second optical element 1820 may directly contact the first support portion 1224, the second support portion 1225, and the third support portion 1226 to define the position of the second optical element 1820. In some embodiments, as Figure 5B shown, the first support portion 1224 may extend along the third axis 1903, where the third axis 1903 may not be parallel to the first axis 1901 and the second axis 1902, and may be perpendicular to each other, for example.

[0160] In some embodiments, as Figure 5CAs shown, the main body surface 1222 of the main body 1221 may have an inclined surface structure. After the second optical element 1820 is placed on the second movable part 1220, the second optical element 1820 will slide downward under gravity until it abuts against the first support part 1224 to define the position of the second optical element 1820 relative to the second movable part 1220. In some embodiments, as Figure 5B shown, the second support part 1225 and the third support part 1226 may have a long strip shape and may extend along the third axis 1903. Specifically, the second support part 1225 may be located at the middle section of the first side 1227 of the main body surface 1222, and the third support part 1226 may be located at the second side 1228 of the main body surface 1222, where the first side 1227 and the second side 1228 may be located on opposite sides of the main body surface 1222.

[0161] In addition, the first side wall 1223 may also have a first groove 1231 and a second groove 1232. The first groove 1231 may be adjacent to the second groove 1232, and the first groove 1231 and the second groove 1232 may respectively have a first groove surface 1233 and a second groove surface 1234 that are adjacent to each other. The first groove 1231 and the second groove 1232 may be recessed from the first side wall surface 1229 of the first side wall 1223, and both the first groove surface 1233 and the second groove surface 1234 are not parallel to the first side wall surface 1229, and the first groove surface 1233 and the second groove surface 1234 are not parallel to each other either. For example, the first groove surface 1233 and the like may have different slopes.

[0162] In some embodiments, a bonding element (not shown), such as an optical curing adhesive, a thermosetting adhesive, a moisture-curing adhesive, an AB adhesive (components such as acrylic, epoxy, polyurethane, etc.), etc., but not limited thereto, may be provided in the first groove 1231 and the second groove 1232. When the bonding element is provided to the second groove 1232, the bonding element may flow along the first groove 1231 between the second movable part 1220 and the second optical element 1820 to fix the second optical element 1820 and the second movable part 1220. By designing the first groove 1231 and the second groove 1232, the bonding area between the bonding element and the second movable part 1220 can be increased, thereby strengthening the bonding strength.

[0163] Figure 6A is a bottom view of the optical element driving mechanism 1000, Figure 6B is a sectional view taken along the Figure 6A line segment G-G shown, and Figure 6C is Figure 6B an enlarged view of the area 1924 of Figures 6A to 6CAs shown, the optical element driving mechanism 1000 may further include a first reinforcing element 1410 and a second reinforcing element 1420, which are disposed on the bottom surface of the base 1120 to protect specific elements.

[0164] like Figure 6C As shown, in some embodiments, the first reinforcing element 1410 may have a first reinforcing element surface 1411, the second reinforcing element 1420 may have a second reinforcing element surface 1421, and the base 1120 may have a second base surface 1128, wherein the second base surface 1128, the first reinforcing element surface 1411, and the second reinforcing element surface 1421 may be parallel to each other, facing the same direction, but located on different planes. Specifically, in the direction in which the second axis 1902 extends (in the Z direction), there may be a first height difference 1931 between the second base surface 1128 and the second reinforcing element surface 1421, and there may be a second height difference 1932 between the first reinforcing element surface 1411 and the second reinforcing element surface 1421, and both the first height difference 1931 and the second height difference 1932 are greater than 0. The second reinforcing element surface 1421 is located between the second base surface 1128 and the first reinforcing element surface 1411.

[0165] In some embodiments, Figure 2F , Figure 6C As shown, a second sensing element 1342 may be provided in the second driving coil 1322 to sense the magnetic field of the second magnetic element 1321, thereby obtaining the position of the second movable portion 1220 relative to the fixed portion 1100. In some embodiments, in the direction in which the second axis 1902 extends, the second sensing element 1342 and the first reinforcing element 1410 may at least partially overlap, thereby allowing the first reinforcing element 1410 to be used to protect the second sensing element 1342 from external impact. In some embodiments, the first reinforcing element 1410 and the second reinforcing element 1420 are provided on the circuit element 1510. The second reinforcing element 1420 may be fixed to the outer frame 1110, for example, by laser welding. The second sensing element 1342 may include a sensing element that is the same as or similar to the aforementioned first sensing element 1341, which will not be described in detail herein.

[0166] In some embodiments, the first reinforcing element 1410 and the second reinforcing element 1420 may have different materials, such as different metals. In some embodiments, the first reinforcing element 1410 and the second reinforcing element 1420 may have different magnetic permeabilities, such as the magnetic permeability of the first reinforcing element 1410 may be greater than the magnetic permeability of the second reinforcing element 1420. Thus, the second sensing element 1342 may be prevented from being interfered with by external magnetic interference.

[0167] In some embodiments, the first reinforcing element 1410 may have a first thickness 1933, the second reinforcing element 1420 may have a second thickness 1934, and the first thickness 1933 and the second thickness 1934 may be different from each other. For example, the first thickness 1933 may be less than the second thickness 1934. In some embodiments, as Figure 6A shown, when viewed along the second axis 1902, the first reinforcing element 1410 and the second reinforcing element 1420 do not overlap each other, so as to reduce the size in the Z-axis direction and achieve miniaturization.

[0168] In some embodiments, the first circuit element 1510 may include a first circuit element surface 1511 and a second circuit element surface 1512 that are opposite to each other, facing the first reinforcing element 1410 and the base 1120 respectively. For example, the first circuit element surface 1511 directly contacts the first reinforcing element 1410 and the second reinforcing element 1420, while the second circuit element surface 1512 directly contacts the base 1120. First adhesive elements 1431 may be provided on both the first circuit element surface 1511 and the second circuit element surface 1512 to fix the first circuit element 1510 to other elements.

[0169] Although the foregoing embodiments disclose embodiments including the first reinforcing element 1410 and the second reinforcing element 1420, the present disclosure is not limited thereto. For example, Figure 7 is a bottom view of an optical element driving mechanism according to another embodiment of the present disclosure, which includes a single first reinforcing element 1410' and does not have a second reinforcing element, depending on the design requirements.

[0170] Figure 8A , Figure 8B , Figure 8C are schematic diagrams of some elements of the optical element driving mechanism 1000, in which different elements are shown respectively to better describe the positional relationship between the elements. As Figures 8A to 8C shown, when viewed along the third axis 1903, the base 1120 may include a first positioning element 1151, a second positioning element 1152, a third positioning element 1153, and a second recessed structure 1154, and the optical element driving mechanism 1000 may further include a second adhesive element 1432 and a third adhesive element 1433. The second adhesive element 1432 is disposed between the circuit element 1510 and the base 1120, and the third adhesive element 1433 may be disposed in the second recessed structure 1154 and may directly contact the first positioning element 1151, the second positioning element 1152, and the third positioning element 1153.

[0171] In some embodiments, the second bonding element 1432 and the third bonding element 1433 may include different materials from each other. For example, the base 1120 and other elements may be initially fixed by the second bonding element 1432, and then further fixed by the third bonding element 1433. The first positioning element 1151, the second positioning element 1152, and the third positioning element 1153 may protrude from the side surface of the base 1120, and the second recessed structure 1154 may be provided at the corner of the base 1120 to accommodate the excess third bonding element 1433.

[0172] In some embodiments, when observed along the third axis 1903, as Figure 8B shown, the circuit element 1510 does not overlap with the first positioning element 1151, the second positioning element 1152, and the third positioning element 1153. For example, it may have recesses or openings corresponding to the first positioning element 1151, the second positioning element 1152, and the third positioning element 1153, so as to position the circuit element 1510 relative to the base 1120 during assembly through the first positioning element 1151, the second positioning element 1152, and the third positioning element 1153. In addition, as Figure 8A shown, when observed along the third axis 1903, the first positioning element 1151 and the second positioning element 1152 may also not overlap with the outer frame 1110, while the third positioning element 1153 at least partially overlaps with the outer frame 1110, that is, the first positioning element 1151 and the second positioning element 1152 may be exposed outside the outer frame 1110.

[0173] Through the design of the embodiments of the present disclosure, a single set of fixing portions 1100 can be used to correspond to two different first movable portions 1210 and second movable portions 1220. For example, both the first movable portion 1210 and the second movable portion 1220 can be provided between the outer frame 1110 and the base 1120, thereby reducing the number of parts of the optical element driving mechanism 1000 and making the assembly process faster.

[0174] In summary, the embodiments of the present disclosure provide an optical element driving mechanism, including a fixing portion, a first movable portion, and a driving component. The first movable portion is used to connect a first optical element and can move relative to the fixing portion. The first driving component is used to drive the first movable portion to move relative to the fixing portion. Thereby, effects such as autofocus, optical image stabilization, and zoom can be achieved, and miniaturization can also be achieved.

[0175] The special relative positions and size relationships of the elements disclosed in the present disclosure can not only make the driving mechanism thinner in a specific direction and miniaturized as a whole, but also further improve the optical quality of the system (such as shooting quality or depth sensing accuracy, etc.) by cooperating with different optical modules, and further utilize each optical module to achieve a multiple anti-vibration system to greatly improve the anti-vibration effect.

[0176] Although the embodiments of the present disclosure and their advantages have been disclosed above, it should be understood that those skilled in the art can make changes, substitutions, and modifications without departing from the spirit and scope of the present disclosure. In addition, the protection scope of the present disclosure is not limited to the processes, machines, manufactures, compositions of matter, devices, methods, and steps in the specific embodiments described in the specification. Instead, any processes, machines, manufactures, compositions of matter, devices, methods, and steps that can be understood by those skilled in the art from the disclosure of the present disclosure, whether currently existing or developed in the future, can be used according to the present disclosure as long as they can perform substantially the same functions or achieve substantially the same results in the embodiments described herein. Therefore, the protection scope of the present disclosure includes the above-mentioned processes, machines, manufactures, compositions of matter, devices, methods, and steps. Additionally, each claim constitutes an individual embodiment, and the protection scope of the present disclosure also includes combinations of each claim and embodiment.

Claims

1. An optical element driving mechanism, characterized in that, Comprising: A fixed part; A first movable part for connecting a first optical element and movable relative to the fixed part; A first driving assembly for driving the first movable part to move relative to the fixed part; A second movable part for connecting a second optical element, including a main body and a first side wall, the first side wall extending from the main body and having a first groove and a second groove, the first groove adjacent to the second groove; An elastic element disposed between the fixed part and the second movable part; and A first buffer element disposed between the fixed part and the second movable part.

2. The optical element driving mechanism according to claim 1, wherein Further comprising a connecting assembly, wherein: The fixed part includes a base; The base has a first recess, a second recess, and a first base surface; The first recess and the second recess are recessed from the first base surface; The first recess has a first recess bottom surface; The second recess has a second recess bottom surface; The second recess surrounds the first recess; The first recess bottom surface is parallel to the second recess bottom surface; The first base surface is parallel to the second recess bottom surface; There is a spacing between the first base surface and the second recess bottom surface; The spacing is less than 0.1 mm; The first recess further has a first side surface and a second side surface; The first side surface is not parallel to the second side surface; The first side surface is not parallel to the first recess bottom surface; The second side surface is not parallel to the first recess bottom surface; The connecting assembly includes a first connecting element; The first movable part includes a third recess; The first connecting element is disposed in the first recess and the third recess; The third recess includes a third recess bottom surface; The third recess bottom surface is parallel to the first recess bottom surface; The first connecting element directly contacts the first side surface, the second side surface, and the third recess bottom surface; The first connecting element is spaced apart from the first recess bottom surface.

3. The optical element driving mechanism according to claim 2, wherein The first movable part further includes a fourth recess, a fifth recess, and a first recess structure; The connecting assembly further includes a second connecting element and a third connecting element; The base further includes a sixth recess and a seventh recess; The second connecting element is disposed in the fourth recess and the sixth recess; The third connecting element is disposed in the fifth recess and the seventh recess; The optical element driving mechanism further includes a first sensing element and an auxiliary magnetic element disposed in the fixed part; The distance between the first sensing element and the fourth recess is less than the distance between the first sensing element and the third recess; The distance between the auxiliary magnetic element and the fourth recess is less than the distance between the auxiliary magnetic element and the third recess.

4. The optical element driving mechanism according to claim 3, wherein The fixed part further includes an outer frame; The outer frame includes an opening; The optical element driving mechanism further includes a second buffer element; The second buffer element is disposed between the fixed part and the first movable part; The first movable part and the second movable part are arranged along a first axis; A second axis is perpendicular to the first axis; In the direction in which the second axis extends, the elastic element and the first buffer element at least partially overlap; In the direction in which the second axis extends, the first concave structure and the third concave portion at least partially overlap; Viewed along the first axis, the elastic element and the first buffer element do not overlap; In the direction in which the first axis extends, the elastic element and the second buffer element at least partially overlap.

5. The optical element driving mechanism according to claim 4, wherein The first side wall has a first support portion; The first groove has a first groove surface; The second groove has a second groove surface; The first groove surface is adjacent to the second groove surface; The first groove surface and the second groove surface are not parallel; The first groove surface and the second groove surface have different slopes; The first support portion extends from the first side wall in a third axis; The third axis is not parallel to the first axis; The third axis is not parallel to the second axis.

6. The optical element driving mechanism according to claim 5, wherein The main body includes a main body surface, a second support portion, and a third support portion; The main body surface faces the second optical element; The second support portion protrudes from the main body surface; The third support portion protrudes from the main body surface; The second support portion extends along the third axis; The third support portion extends along the third axis; The second support portion is located on a first side of the main body surface; The third support portion is located on a second side of the main body surface; The first side and the second side are opposite; The third axis is perpendicular to the first axis; The third axis is perpendicular to the second axis.

7. The optical element driving mechanism according to claim 6, wherein The fixing portion further includes a first reinforcing element and a second reinforcing element, which are disposed on the base; the base further includes a second base surface; The first reinforcing element includes a first reinforcing element surface; The second reinforcing element includes a second reinforcing element surface; The first reinforcing element surface is parallel to the second reinforcing element surface; The first reinforcing element surface is parallel to the second base surface; In the direction in which the second axis extends, there is a first height difference between the second base surface and the second reinforcing element surface; In the direction in which the second axis extends, there is a second height difference between the first reinforcing element surface and the second reinforcing element surface; Both the first height difference and the second height difference are greater than zero; The second reinforcing element surface is located between the second base surface and the first reinforcing element surface; The second support portion is located at an intermediate section of the first side.

8. The optical element driving mechanism according to claim 7, wherein It further includes a second sensing element, wherein: In the direction in which the second axis extends, the second sensing element and the first reinforcing element at least partially overlap; The first reinforcing element and the second reinforcing element are made of different materials; The first reinforcing element and the second reinforcing element have different magnetic permeabilities; The first reinforcing element has a first thickness; The second reinforcing element has a second thickness; The first thickness is different from the second thickness; Viewed along the second axis, the first reinforcing element and the second reinforcing element do not overlap; The second reinforcing element is welded to the outer frame.

9. The optical element driving mechanism according to claim 8, wherein It further includes a circuit component and a first bonding component, wherein: The circuit component includes a first circuit component surface and a second circuit component surface; The first circuit component surface is in direct contact with the first reinforcing component and the second reinforcing component; The second circuit component surface is in direct contact with the base; The first circuit component surface is opposite to the second circuit component surface; The first bonding component is disposed on the first circuit component surface and the second circuit component surface; The magnetic permeability of the first reinforcing component is greater than that of the second reinforcing component; The first thickness is less than the second thickness.

10. The optical element driving mechanism according to claim 9, wherein When observing along the third axis, the base includes a second recessed structure, a first positioning element, a second positioning element, and a third positioning element; The optical element driving mechanism further includes a second bonding component and a third bonding component; The second bonding component is disposed between the base and the circuit component; The third bonding component is disposed in the second recessed structure; The third bonding component is in direct contact with the first positioning element; The third bonding component is in direct contact with the second positioning element; The third bonding component is in direct contact with the third positioning element; The third bonding component is in direct contact with the second bonding component; When observing along the third axis, the circuit component does not overlap with the first positioning element, the second positioning element, and the third positioning element; When observing along the third axis, the outer frame does not overlap with the first positioning element and the second positioning element; When observing along the third axis, the outer frame at least partially overlaps with the third positioning element; When observing along the first axis, the base further includes a protrusion exposed outside the outer frame; The protrusion includes a first protrusion surface and a second protrusion surface, both of which are exposed outside the outer frame; The slope of the first protrusion surface is different from the slope of the second protrusion surface.

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