Drive mechanism

Abstract

A driving mechanism is used for driving an optical element to move and mainly comprises a fixed part, a movable part and a driving assembly. The movable part is movably connected with the fixed part, the optical element is arranged on the movable part, and the driving assembly is used for driving the movable part to move relative to the fixed part.

Description

Technical Field

[0001] The utility model relates to a driving mechanism, and more specifically, to a driving mechanism for driving an optical element to move. Background Art

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. These electronic devices are becoming more and more popular and are developing in the direction of convenient and thinner designs to provide users with more choices.

[0003] Some electronic devices with camera or video recording functions are equipped with a lens driving module to drive an optical element to move, thereby achieving the functions of auto focusing (AF) and optical image stabilization (OIS), wherein light can pass through the aforementioned optical element and form an image on a photosensitive element.

[0004] However, how to further miniaturize the lens driving module and improve its stability and reliability has become an important challenge for researchers in this related technical field. Utility Model Content

[0005] The purpose of the present invention is to provide a driving mechanism to solve at least one of the above problems.

[0006] In view of the above-mentioned known problems, one embodiment of the present invention provides a driving mechanism for driving an optical element to move. The driving mechanism mainly includes a fixed portion, a movable portion, and a driving assembly. In one embodiment, the movable portion is connected to the fixed portion, the optical element is disposed on the movable portion, the optical element has an optical axis, and the driving assembly is used to drive the optical element to move relative to the fixed portion.

[0007] In one embodiment, the driving mechanism further includes a spring and a plurality of elongated elastic elements, wherein the spring is disposed on the fixed portion, and the movable portion includes an elastic circuit board, wherein the elastic element connects the spring and the circuit board along the direction of the optical axis, and the optical element is disposed on the circuit board.

[0008] According to one embodiment of the utility model, the driving mechanism also includes a frame arranged on the circuit board, the fixing portion includes an outer frame and a first shell connected to each other, and the frame is arranged in the outer frame, wherein the driving component includes a first coil arranged on the first shell and a first magnet arranged on the frame, and the first coil is electrically connected to the circuit board through the reed and the elastic element.

[0009] According to one embodiment of the utility model, the first shell is formed with a groove and a protrusion adjacent to each other, and the protrusion protrudes from the bottom side of the first shell, wherein a first optical mirror is arranged in the groove, and the first coil is arranged on the protrusion.

[0010] According to one embodiment of the utility model, the first shell is formed with a groove and a convex rib adjacent to each other, wherein a first optical mirror is disposed in the groove, and the convex rib partially overlaps with the groove in a horizontal direction, wherein the horizontal direction is perpendicular to the optical axis.

[0011] According to one embodiment of the present invention, an inner portion of the spring sheet is bonded to the convex rib.

[0012] According to one embodiment of the present invention, a plurality of elastic elements connect an outer portion of the spring sheet and the circuit board.

[0013] According to one embodiment of the present invention, the outer portion of the reed is higher than the inner portion of the reed in the direction of the optical axis.

[0014] According to one embodiment of the present invention, the circuit board has a body and an extension portion, the extension portion is bent relative to the body, and the optical element is disposed on the body.

[0015] According to one embodiment of the present invention, the extension portion has a C-shaped structure and is parallel to the optical axis.

[0016] According to one embodiment of the utility model, the driving mechanism also includes a metal part, the movable part includes a circuit board with elasticity, the optical element is arranged on the circuit board, and the fixed part has an outer frame and an upper cover fixed to each other, wherein the circuit board and the metal part are arranged in the outer frame, and an optical lens is arranged on the upper cover, wherein the metal part has a low magnetic permeability and shields the optical element.

[0017] According to one embodiment of the present invention, the metal piece is formed with a plurality of heat dissipation fins, and the plurality of heat dissipation fins pass through the outer frame and protrude from the bottom side of the outer frame.

[0018] According to one embodiment of the present invention, the outer frame is formed with a convex rib, and when the circuit board moves to an extreme position along the optical axis direction relative to the outer frame, the convex rib contacts the circuit board.

[0019] According to one embodiment of the present invention, the driving mechanism further includes a gel disposed between the circuit board and the metal member.

[0020] According to one embodiment of the utility model, the movable part also includes a first frame and a second frame, and the driving component includes a first coil arranged on the first frame and a first magnet arranged on the second frame, wherein the circuit board has a first connecting part, a second connecting part and a first elastic structure, the first frame is arranged on the first connecting part, the second frame is arranged on the second connecting part, and the first elastic structure connects the first and second connecting parts.

[0021] According to one embodiment of the present invention, the first coil and the optical lens at least partially overlap in a horizontal direction, and the horizontal direction is perpendicular to the optical axis.

[0022] According to one embodiment of the present invention, the circuit board also has a third connecting portion and a second elastic structure, and the movable portion further includes a third frame, wherein the third frame is disposed on the third connecting portion, and the second elastic structure connects the second and third connecting portions.

[0023] According to one embodiment of the present invention, the driving assembly further includes a second coil and a second magnet, wherein the second coil is disposed on the second frame, and the second magnet is disposed on the third frame.

[0024] According to one embodiment of the present invention, the third frame is fixed on the outer frame, and the second frame is located between the first frame and the third frame.

[0025] According to one embodiment of the present invention, the thickness of the first frame in the direction of the optical axis is smaller than the thickness of the second frame in the direction of the optical axis, and the thickness of the second frame in the direction of the optical axis is smaller than the thickness of the third frame in the direction of the optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram showing a driving mechanism according to an embodiment of the utility model.

[0027] Figure 2 express Figure 1 Another perspective stereogram of the drive mechanism in .

[0028] Figure 3 express Figure 1 and Figure 2 Exploded diagram of the drive mechanism in .

[0029] Figure 4 express Figure 3 An exploded view of the first module in the .

[0030] Figure 5A perspective view showing that the first coil is arranged on the protruding portion of the first housing.

[0031] Figure 6 express Figure 4 A three-dimensional diagram of the first module after assembly with the first coil, the first shell and the first optical mirror removed.

[0032] Figure 7 express Figure 4 A three-dimensional diagram of the first module after assembly.

[0033] Figure 8 Schematic diagram showing external light entering the third optical mirror along the -Z axis direction.

[0034] Fig. 9 A three-dimensional diagram showing a driving mechanism according to another embodiment of the present invention.

[0035] Fig.10 express Figure 1 Another perspective stereogram of the drive mechanism in .

[0036] Fig.11 express Fig. 9 and Fig.10 Exploded diagram of the drive mechanism in .

[0037] Fig.12 express Fig.11 Exploded view of the drive unit in Figure 1.

[0038] Fig.13 express Fig. 9 and Fig.10 A partial cross-sectional enlarged view of the drive mechanism in FIG.

[0039] The reference numerals are as follows:

[0040] 100: Driving mechanism

[0041] 10: First module

[0042] 11: First shell

[0043] 12: Reed

[0044] 13: Elastic element

[0045] 110: Groove

[0046] 111: ribs

[0047] 112: protrusion

[0048] 20: Second module

[0049] 21: Second shell

[0050] 22: Second optical mirror

[0051] 30: The third module

[0052] 31: The third shell

[0053] 311: Inner side

[0054] 200: Driving mechanism

[0055] 201: Optical lens

[0056] 202: Upper cover

[0057] 203:Driver unit

[0058] B:Substrate

[0059] BL:Ball

[0060] C1: First coil

[0061] C2: Second coil

[0062] C3: The third coil

[0063] F: Framework

[0064] F1: First Frame

[0065] F2: Second frame

[0066] F3: Third Frame

[0067] H: Outer frame

[0068] H1: Raised ribs

[0069] L: External light

[0070] M: Magnetic components

[0071] M1: First magnet

[0072] M2: First magnet

[0073] M3: The third magnet

[0074] N:Metal parts

[0075] N1: cooling fins

[0076] O: Optical axis

[0077] P: The third optical mirror

[0078] Q: Circuit board

[0079] Q1: First connection

[0080] Q12: The first elastic structure

[0081] Q2: Second connection

[0082] Q23: Second elastic structure

[0083] Q3: The third connection

[0084] Q4: Conductive terminal

[0085] QB:Body

[0086] QC: Extension

[0087] R: First optical mirror

[0088] S: Optical Components

[0089] W: Outer frame DETAILED DESCRIPTION

[0090] The following describes the drive mechanism of the embodiment of the utility model. However, it is easy to understand that the embodiment of the utility model provides many suitable utility model concepts and can be implemented in a wide variety of specific backgrounds. The specific embodiments disclosed are only used to illustrate the use of the utility model in a specific way, and are not used to limit the scope of the utility model.

[0091] Unless otherwise defined, all terms (including technical and scientific terms) used in this patent have the same meanings as commonly understood by those skilled in the art to which this disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined herein.

[0092] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used in the embodiments are used to illustrate and not to limit the present invention.

[0093] First, please refer to Figures 1 to 3 ,in Figure 1 A three-dimensional diagram showing a driving mechanism 100 according to an embodiment of the present utility model is shown. Figure 2 express Figure 1 Another perspective view of the driving mechanism 100, Figure 3 express Figure 1 and Figure 2 Exploded view of the drive mechanism 100 in FIG.

[0094] like Figure 1 , Figure 2 and Figure 3 As shown, the driving mechanism 100 of the present embodiment includes a voice coil motor (VCM), and can be installed in a mobile phone or other portable electronic device to drive an optical element (such as a lens, a prism or an image sensor) to move, thereby achieving functions such as auto focusing (AF) and / or optical image stabilization (OIS).

[0095] The driving mechanism 100 mainly includes a first module 10, a second module 20 and a third module 30 which are interconnected. The first module 10 includes a first shell 11, an outer frame W, a first optical lens R (such as a prism) and a flexible circuit board Q, wherein the first optical lens R is arranged inside the first shell 11, and the outer frame W connects the first shell 11 and the circuit board Q.

[0096] The second module 20 is disposed between the first module 10 and the third module 30, and mainly includes a second shell 21 and a second optical mirror 22 (e.g., a lens) fixed on the shell 21; in addition, the third module 30 includes a third shell 31, a third optical mirror P (e.g., a prism) and a substrate B (e.g., a printed circuit board), the third optical mirror P is disposed on the top side of the third shell 31, and the substrate B is fixed on the bottom side of the third shell 31 to shield and carry the circuit board Q, wherein the hardness of the substrate B is greater than the hardness of the circuit board Q.

[0097] Please also read Figure 4 , Figure 5 , Figure 6 and Figure 7 ,in Figure 4 express Figure 3 An exploded view of the first module 10 in FIG. Figure 5 A three-dimensional diagram showing that the first coil C1 is disposed on the protruding portion 112 of the first housing 11, Figure 6 express Figure 4 A three-dimensional diagram of the first module 10 after assembly with the first coil C1, the first housing 11 and the first optical lens R removed, Figure 7 express Figure 4 A three-dimensional diagram of the first module 10 after assembly.

[0098] like Figure 4 and Figure 5As shown, the outer frame W of the first module 10 can be used as a fixed part of the driving mechanism 100, wherein a frame F is provided inside the outer frame W, the outer frame W and the frame F are both C-shaped, and the openings of both face the same direction (-Y axis direction), and three magnetic elements M (such as magnets) are respectively arranged on three different sides of the frame F.

[0099] On the other hand, from Figure 4 and Figure 5 It can be seen that the first shell 11 of the first module 10 is formed with a groove 110, two ribs 111 and two protrusions 112, wherein the groove 110, the rib 111 and the protrusion 112 are adjacent to each other, the rib protrudes from the groove 110 in the -X axis direction, and the protrusion 112 protrudes from the bottom side of the first shell 11 in the -Z axis direction.

[0100] In this embodiment, the aforementioned rib 111 partially overlaps with the groove 11 in a horizontal direction (X-axis direction), so that the rib 111 can be used to partially shield the groove 110, thereby restricting the first optical mirror R in the aforementioned groove 110 to prevent the first optical mirror R from sliding out of the groove 110 along the -X-axis direction.

[0101] On the other hand, first coils C1 are respectively disposed on the protruding portions 112 , and their positions correspond to two of the magnetic elements M disposed on the frame F.

[0102] It should be particularly noted that at least one spring sheet 12 (e.g., a metal spring sheet) and a plurality of elongated elastic elements 13 (e.g., metal thin rods) are provided in the aforementioned outer frame W, wherein the inner portion of the aforementioned spring sheet 12 is bonded and fixed to the bottom surface of the convex rib 111 of the first shell 11, and the aforementioned elastic element 13 extends in the Z-axis direction and connects the outer portion of the spring sheet 12 and the flat plate-shaped body QB located in the center of the circuit board Q.

[0103] In this way, the body QB of the circuit board Q can be suspended in the outer frame W in a movable manner, and the first coil C1 can be electrically connected to the circuit board Q below through the spring 12 and the elastic element 13. On the other hand, since the inner side of the spring 12 abuts against the protrusion 112 during assembly, the positioning effect between the spring 12 and the first housing 11 can be improved.

[0104] In this embodiment, during assembly, the reed 12 and the first optical lens R can be glued and fixed to the first housing 11 together with glue, which can not only improve the assembly efficiency, but also greatly increase the structural strength and reliability of the lifting drive mechanism 100.

[0105] In addition, the aforementioned frame F is connected to the outer portion of the reed 12, wherein a rectangular optical element S (such as an image sensor) and three second coils C2 are provided on the main body QB of the aforementioned circuit board Q, and the aforementioned second coils C2 are arranged on three different sides of the optical element S and are respectively located under the three magnetic elements M on the aforementioned frame F.

[0106] It should be understood that the outer portion of the assembled reed 12 is slightly higher than the inner portion of the reed 12 in the Z-axis direction, and the optical element S has an optical axis O ( Figure 4 and Figure 6 ).

[0107] In detail, the first and second coils C1, C2 and the magnetic element M can together constitute a driving component in the driving mechanism 100, which is used to drive the optical element S to move; it should be understood that when the current signal is passed into the first coil C1, an electromagnetic driving force parallel to the Z-axis direction (optical axis O direction) can be generated between the first coil C1 and the magnetic element M, thereby driving the frame F, the magnetic element M set on the frame F, the body QB of the circuit board Q, the optical element S and the second coil C2 and other elements to move relative to the fixed part (outer frame W and the first shell 11) along the Z-axis direction to achieve autofocus (AF) and / or optical image stabilization (OIS) function in the Z-axis direction.

[0108] Secondly, when the current signal is passed into the second coil C2, an electromagnetic driving force in the horizontal direction (X-axis or Y-axis direction) can be generated between the second coil C2 and the magnetic element M, thereby driving the main body QB of the circuit board Q and the optical element S and the second coil C2 and other elements arranged on the main body QB to move relative to the frame F and the fixed part (outer frame W and the first shell 11) along the horizontal direction (X-axis or Y-axis direction), so that the driving mechanism 100 can have the function of optical image stabilization (OIS) in the horizontal direction (X-axis or Y-axis direction).

[0109] Figure 8 Schematic diagram showing the external light L entering the third optical mirror P along the -Z axis direction. Figure 8 As shown, the external light L can enter the third optical mirror P along the -Z axis direction, and the light will be refracted by the third optical mirror P and pass through the second optical mirror 22 along the Y axis direction. Then the light will enter the first optical mirror R and be refracted by the first optical mirror R along the -Z axis direction to reach the optical element S located in the center of the circuit board Q, thereby generating a digital image.

[0110] from Figure 4 , Figure 6 , Figure 7 , Figure 8As can be seen from the figure, the circuit board Q of the present embodiment is elastic and can be used as a movable part of the driving mechanism 100, which mainly includes a flat body QB and two C-shaped extensions QC, the extensions QC being bent from one side of the body QB and parallel to the Z-axis direction; in this way, the first and second coils C1, C2 and the optical element S located inside the first module 10 can be electrically connected to the inner side surface 311 ( Figure 8 ) on the electrical contacts (not shown), thereby effectively utilizing the internal space of the driving mechanism 100, thereby helping to achieve miniaturization of the driving mechanism 100 and the overall volume of the electronic device.

[0111] Please refer to Figures 9 to 13 ,in Fig. 9 A three-dimensional diagram showing a driving mechanism 200 according to another embodiment of the present invention. Fig.10 express Figure 1 Another perspective view of the driving mechanism 200, Fig.11 express Fig. 9 and Fig.10 An exploded view of the drive mechanism 200 in FIG. Fig.12 express Fig.11 An exploded view of the drive unit 203 in FIG. Fig.13 express Fig. 9 and Fig.10 A partial cross-sectional enlarged view of the drive mechanism 200 in FIG.

[0112] like Figures 9 to 13 As shown, the driving mechanism 200 of another embodiment of the present invention also includes a voice coil motor (VCM), and can be installed in a mobile phone or other portable electronic device to drive an optical element (such as a lens, prism or image sensor) to move, thereby achieving functions such as auto focusing (AF) and / or optical image stabilization (OIS).

[0113] The driving mechanism 200 mainly includes an optical lens 201, a top cover 202, a driving unit 203, a plastic frame H, and a metal member N. Specifically, the optical lens 201 is installed at the center of the top cover 202, and the top cover 202 and the frame H are fixed to each other; in addition, the driving unit 203 is disposed in the frame H, and the metal member N is disposed on the bottom side of the frame H.

[0114] It should be particularly noted that the aforementioned metal component N has a low magnetic permeability coefficient, and thus can be used to shield the optical element S (such as an image sensor) in the driving mechanism 200 to prevent the electronic components outside the driving mechanism 200 from generating electromagnetic interference to the aforementioned optical element S; in addition, the aforementioned metal component N is formed with a plurality of heat dissipation fins N1, wherein the aforementioned heat dissipation fins N1 pass through the outer frame H and protrude from the bottom side of the outer frame H, thereby being able to greatly enhance the heat dissipation effect of the driving mechanism 200.

[0115] from Fig.12 It can be seen that the aforementioned driving unit 203 mainly includes a first frame F1, a second frame F2, a third frame F3 and a circuit board Q, and the aforementioned driving unit 203 can be used as a movable part of the driving mechanism 200. Specifically, the aforementioned circuit board Q is elastic, and it mainly includes a first connecting portion Q1, a second connecting portion Q2, a third connecting portion Q3, a conductive terminal portion Q4, a first elastic structure Q12 and a second elastic structure Q23.

[0116] The first connection portion Q1 and the second connection portion Q2 are connected to each other via a slender and tortuous first elastic structure Q12, and the second connection portion Q2 and the third connection portion Q3 are connected to each other via a slender and tortuous second elastic structure Q23; in addition, the conductive terminal portion Q4 protrudes from one side of the third connection portion Q3 toward the X-axis direction.

[0117] In this embodiment, the coil and the optical element S (eg, image sensor) inside the driving unit 203 can be electrically connected to the circuit board Q via wires, and can also be further connected to an external circuit via the conductive terminal portion Q4 of the circuit board Q.

[0118] It should be particularly noted that the upper cover 202 and the outer frame H can be used as a fixing portion of the driving mechanism 200 , and the first frame F1 , the second frame F2 and the third frame F3 are disposed in the outer frame H and all have a hollow rectangular structure.

[0119] Specifically, the first frame F1 is fixed to the first connection portion Q1 of the circuit board Q, the second frame F2 is fixed to the second connection portion Q2 of the circuit board Q, and the third frame F3 is fixed to the third connection portion Q3 of the circuit board Q, wherein the third frame F3 and the outer frame H and the upper cover 202 are bonded and fixed to each other ( Fig.13 ).

[0120] In this embodiment, the thickness of the first frame F1 in the Z-axis direction is smaller than the thickness of the second frame F2 in the Z-axis direction, and the thickness of the second frame F2 in the Z-axis direction is smaller than the thickness of the third frame F3 in the Z-axis direction.

[0121] from Fig.11 , Fig.12 and Fig.13 It can be seen that two first coils C1 are provided on the outer surface of the aforementioned first frame F1, and two first magnets M1 are provided on the inner side of the aforementioned second frame F2, corresponding to the aforementioned first coils C1, wherein the aforementioned second frame F2 is located between the first frame F1 and the third frame F3, and the aforementioned optical element S (such as an image sensor) is arranged at the center of the first connecting portion Q1 of the circuit board Q.

[0122] On the other hand, two second magnets M2 and one third magnet M3 are provided on the outer side of the second frame F2, and two second coils C2 and one third coil C3 are provided on the inner side of the outer frame H, wherein the position of the second coil C2 corresponds to the second magnet M2, and the position of the third coil C3 corresponds to the third magnet M3.

[0123] In detail, the first, second and third coils C1, C2 and C3 and the first, second and third magnets M1, M2 and M3 may constitute a driving component in the driving mechanism 200 to drive the optical element S to move.

[0124] It should be understood that when a current signal is passed into the first coil C1, an electromagnetic driving force parallel to the Z-axis direction (the direction of the optical axis O of the optical element S) can be generated between the first coil C1 and the first magnet M1, thereby driving the optical element S located in the center of the first connecting portion Q1 and the first frame F1 to move relative to the second frame F2 along a direction parallel to the Z-axis, so as to achieve autofocus (AF) and / or optical image stabilization (OIS) function in the Z-axis direction.

[0125] In addition, when the current signal is passed into the second coil C2, an electromagnetic driving force parallel to the X-axis direction can be generated between the second coil C2 and the second magnet M2, thereby driving the second connecting part Q2, the second frame F2 together with the optical element S in the center of the first connecting part Q1 and the first frame F1 to move relative to the outer frame H along the direction parallel to the X-axis, so that the driving mechanism 200 can have the function of optical image stabilization (OIS) in the X-axis direction.

[0126] Similarly, when the current signal is passed into the third coil C3, an electromagnetic driving force parallel to the Y-axis direction can be generated between the third coil C3 and the third magnet M3, thereby driving the second connecting part Q2 and the second frame F2 together with the optical element S in the center of the first connecting part Q1 and the first frame F1 to move relative to the outer frame H along the direction parallel to the Y-axis, so that the driving mechanism 200 can also have the function of optical image stabilization (OIS) in the Y-axis direction.

[0127] In this embodiment, a ball bearing BL is further provided between the first frame F1 and the second frame F2, thereby making the first frame F1 more stable when sliding relative to the second frame F2 along the Z-axis direction (the direction of the optical axis O of the optical element S), thereby improving the reliability of the driving mechanism 200.

[0128] In addition, from Fig.13 It can be seen that the first coil C1 and the second coil C2 at least partially overlap with the optical lens 201 in the horizontal direction (X-axis direction), thereby greatly reducing the height dimension of the driving mechanism 200 in the Z-axis direction, which is conducive to miniaturization of the driving mechanism 200.

[0129] It should be particularly noted that there will be a gap between the aforementioned circuit board Q and the metal part N / outer frame H after assembly, wherein a rectangular rib H1 protrudes from the bottom surface of the outer frame H (Figures 11 and 13), and its position corresponds to the second connection portion Q2 of the circuit board Q, that is, the aforementioned second connection portion Q2 and the aforementioned rib H1 at least partially overlap in the Z-axis direction (the direction of the optical axis O of the optical element S).

[0130] In this way, when the driving mechanism 200 is hit by external force and causes the circuit board Q to move along the -Z axis direction inside the outer frame H, the aforementioned rib H1 will contact the second connection portion Q2 of the circuit board Q2, thereby limiting the circuit board Q to an extreme position to prevent the optical element S located in the center of the circuit board Q from colliding with the metal part N below and causing its structural damage.

[0131] In one embodiment, gel may be disposed between the circuit board Q and the metal member N to prevent the circuit board Q or the optical element S from colliding with the metal member N below and causing structural damage thereto.

[0132] Although the embodiments and advantages of the present invention have been disclosed above, it should be understood that those skilled in the art may make changes, substitutions and modifications without departing from the spirit and scope of the present invention. In addition, the scope of protection of the present invention is not limited to the processes, machines, manufacturing, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any technician in the relevant technical field can understand the current or future developed processes, machines, manufacturing, material compositions, devices, methods and steps from the disclosure of the present invention, as long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can be used according to the present invention.

[0133] Therefore, the protection scope of the present invention includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each claim constitutes a separate embodiment, and the protection scope of the present invention also includes the combination of each claim and embodiment.

[0134] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Those skilled in the art may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the attached claims.

Claims

1. A driving mechanism for driving an optical element to move, characterized in that: The driving mechanism comprises: a fixing portion; a movable portion connected to the fixed portion, wherein the optical element is disposed on the movable portion and has an optical axis; and A driving assembly is used to drive the optical element to move relative to the fixing portion.

2. The driving mechanism according to claim 1, characterized in that: The driving mechanism also includes a spring and a plurality of long elastic elements, the spring is arranged on the fixed part, and the movable part includes an elastic circuit board, wherein the plurality of elastic elements connect the spring and the circuit board along the optical axis direction, and the optical element is arranged on the circuit board.

3. The driving mechanism according to claim 2, characterized in that: The driving mechanism also includes a frame arranged on the circuit board, the fixing portion includes an outer frame and a first shell connected to each other, and the frame is arranged in the outer frame, wherein the driving component includes a first coil arranged on the first shell and a first magnet arranged on the frame, and the first coil is electrically connected to the circuit board through the reed and the elastic element.

4. The driving mechanism according to claim 3, characterized in that: The first shell is formed with a groove and a protrusion adjacent to each other, and the protrusion protrudes from the bottom side of the first shell, wherein a first optical mirror is arranged in the groove, and the first coil is arranged on the protrusion.

5. The driving mechanism according to claim 3, characterized in that: The first shell is formed with a groove and a convex rib adjacent to each other, wherein a first optical mirror is arranged in the groove, and the convex rib and the groove are partially overlapped in a horizontal direction, wherein the horizontal direction is perpendicular to the optical axis.

6. The driving mechanism according to claim 5, characterized in that: An inner side portion of the spring sheet is bonded to the convex rib.

7. The driving mechanism according to claim 6, characterized in that: A plurality of elastic elements connect an outer portion of the spring sheet and the circuit board.

8. The driving mechanism according to claim 7, characterized in that: The outer portion of the reed is higher than the inner portion of the reed in the optical axis direction.

9. The driving mechanism according to claim 2, characterized in that: The circuit board has a body and an extension portion, the extension portion is bent relative to the body, and the optical element is arranged on the body.

10. The driving mechanism according to claim 9, characterized in that: The extension portion has a C-shaped structure and is parallel to the optical axis.

11. The driving mechanism according to claim 1, characterized in that: The driving mechanism also includes a metal part, the movable part includes a flexible circuit board, the optical element is arranged on the circuit board, and the fixed part has an outer frame and an upper cover fixed to each other, wherein the circuit board and the metal part are arranged in the outer frame, and an optical lens is arranged on the upper cover, wherein the metal part has a low magnetic permeability and shields the optical element.

12. The driving mechanism according to claim 11, characterized in that: The metal piece is formed with a plurality of heat dissipation fins, and the plurality of heat dissipation fins pass through the outer frame and protrude from the bottom side of the outer frame.

13. The driving mechanism according to claim 11, characterized in that: The outer frame is formed with a convex rib, and when the circuit board moves to an extreme position along the optical axis direction relative to the outer frame, the convex rib contacts the circuit board.

14. The driving mechanism according to claim 11, characterized in that: The driving mechanism also includes a gel arranged between the circuit board and the metal piece.

15. The driving mechanism according to claim 11, characterized in that: The movable part also includes a first frame and a second frame, and the driving component includes a first coil arranged on the first frame and a first magnet arranged on the second frame, wherein the circuit board has a first connecting part, a second connecting part and a first elastic structure, the first frame is arranged on the first connecting part, the second frame is arranged on the second connecting part, and the first elastic structure connects the first and second connecting parts.

16. The driving mechanism according to claim 15, characterized in that: The first coil and the optical lens at least partially overlap in a horizontal direction, and the horizontal direction is perpendicular to the optical axis.

17. The driving mechanism according to claim 15, characterized in that: The circuit board also has a third connection part and a second elastic structure, and the movable part also includes a third frame, wherein the third frame is arranged on the third connection part, and the second elastic structure connects the second and third connection parts.

18. The driving mechanism according to claim 17, characterized in that: The driving component also includes a second coil and a second magnet, wherein the second coil is arranged on the second frame, and the second magnet is arranged on the third frame.

19. The driving mechanism according to claim 18, characterized in that: The third frame is fixed on the outer frame, and the second frame is located between the first frame and the third frame.

20. The driving mechanism according to claim 19, characterized in that: The thickness of the first frame in the direction of the optical axis is smaller than the thickness of the second frame in the direction of the optical axis, and the thickness of the second frame in the direction of the optical axis is smaller than the thickness of the third frame in the direction of the optical axis.

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