CN108072957B

CN108072957B - Optical drive mechanism

Info

Publication number: CN108072957B
Application number: CN201710692829.6A
Authority: CN
Inventors: 郭侲圻; 胡朝彰; 宋欣忠
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2016-11-14
Filing date: 2017-08-14
Publication date: 2022-05-24
Anticipated expiration: 2037-08-14
Also published as: CN108072960A; CN108072958A; CN108072957A; CN108072960B

Abstract

An optical driving mechanism includes a base plate, an elastic member, a movable portion and a biasing member. The movable part is arranged on the bottom plate and comprises a base and a bearing part, wherein the bearing part is used for bearing the optical lens and is movably connected with the base. The elastic piece is connected with the bottom plate and the movable part. The bias assembly is connected with the bottom plate and the movable part and is used for driving the movable part to move relative to the bottom plate. When the bearing piece moves to a lower limit position relative to the base, the bearing piece contacts the elastic piece.

Description

Optical drive mechanism

Technical Field

The present invention relates to an optical driving mechanism, and more particularly, to an optical driving mechanism for limiting the movement of a carrier and an optical lens through an outer frame.

Background

With the development of technology, many electronic devices (e.g., tablet computers or smart phones) are miniaturized and equipped with a lens module to have a function of taking pictures or recording videos. When a user uses an electronic device equipped with a lens module, the electronic device may shake, and an image captured by the lens module may be blurred. Nowadays, the demand for high quality images and miniaturization of electronic products is increasing, and electronic products having excellent shock-proof function and miniaturized lens modules are becoming more and more important.

Disclosure of Invention

The present invention is directed to an optical driving mechanism, which has a better focusing function and an optical shake compensation function.

The invention provides an optical driving mechanism which is arranged in an electronic device and used for driving an optical lens. The optical driving mechanism includes a base plate, an elastic member, a movable portion and a biasing member. The movable part is arranged on the bottom plate and comprises a base and a bearing part, wherein the bearing part is used for bearing the optical lens and is movably connected with the base. The elastic piece is connected with the bottom plate and the movable part. The bias assembly is connected with the bottom plate and the movable part and is used for driving the movable part to move relative to the bottom plate. When the bearing piece moves to a lower limit position relative to the base, the bearing piece contacts the elastic piece. The optical lens has larger moving distance, and an additional limit mechanism in the movable part can be saved, so that the volume of the optical driving mechanism is reduced.

In an embodiment, the optical driving mechanism further includes an outer frame connected to and disposed on the bottom plate, and the movable portion is disposed in the outer frame, and when the supporting member moves to an upper limit position relative to the base, the supporting member contacts the outer frame.

In an embodiment, the movable portion further includes an inner frame disposed on the base, and the inner frame does not overlap with the supporting member in an optical axis direction of the optical lens.

In an embodiment, when the supporting element moves to the upper limit position, the supporting element protrudes from the inner frame.

In an embodiment, when the supporting element moves along the optical axis of the optical lens in the outer frame, the supporting element does not directly contact the base and the inner frame.

In one embodiment, the inner frame includes a magnetic material.

In an embodiment, the optical driving mechanism further includes an electromagnetic driving component disposed on the inner frame and the supporting component for driving the supporting component to move relative to the base, and the electromagnetic driving component has at least one magnetic element disposed in the inner frame, and the magnetic element is exposed from the inner frame in the optical axis direction.

In an embodiment, the movable portion further includes a first spring having a bending structure, and the first spring connects the supporting member and the inner frame, and the bending structure is exposed from the inner frame in the optical axis direction.

In one embodiment, the base has a first engaging portion, the elastic member has a second engaging portion, and the first engaging portion and the second engaging portion are engaged with each other.

In one embodiment, when the supporting member moves to the lower limit position, the supporting member protrudes from the lower surface of the base.

In one embodiment, an opening of the elastic member is formed with a flange structure extending toward the base.

In an embodiment, the flange structure of the elastic member overlaps the supporting member in a direction perpendicular to the optical axis.

In one embodiment, the base plate has a flange structure passing through the elastic member.

In an embodiment, the flange structure of the base plate overlaps the supporting member in a direction perpendicular to the optical axis.

In one embodiment, the biasing element is made of a memory alloy material.

In an embodiment, the bias assembly drives the movable portion to move in a direction perpendicular to an optical axis of the optical lens, or drives the movable portion to rotate around the optical axis.

The optical driving structure provided by the invention has the advantages and beneficial effects that: the invention provides an optical driving mechanism for driving an optical lens. The optical driving mechanism mainly includes a bottom plate, an outer frame, a movable portion and a bias assembly. The outer frame is connected and arranged on the bottom plate, and the movable part and the bias assembly are arranged in the outer frame. The movable part comprises a base and a bearing piece, wherein the bearing piece is used for bearing the optical lens and is movably connected with the base. The biasing assembly is connected with the bottom plate and the movable part and is used for driving the movable part to move relative to the bottom plate. When the bearing piece moves to an extreme position relative to the base, the bearing piece contacts the outer frame. The optical driving mechanism has better focusing function and optical shake compensation, thereby improving the image quality, saving the thickness of an inner frame of the movable part in the optical axis direction and greatly reducing the volume of the optical driving mechanism.

Drawings

Fig. 1 is an exploded view of an optical driving mechanism according to an embodiment of the present invention.

Fig. 2 is a schematic view of the optical drive mechanism assembly of fig. 1 (with the outer frame 20 omitted).

Fig. 3 is a cross-sectional view of the movable portion taken along line B-B in fig. 2.

Fig. 4 is a schematic view of the combination of the inner frame, a magnetic element and the first spring.

Fig. 5 is a schematic view of the first spring and the second spring connecting the bearing member and the base.

Fig. 6 is a plan view of the optical drive mechanism (outer frame omitted) in fig. 2.

Fig. 7-8 are cross-sectional views (from different perspectives) of the optical drive mechanism of fig. 1 taken along line a-a after assembly.

FIG. 9 is a schematic view of the connection of the base plate, the resilient member and the biasing assembly.

Fig. 10 is an exploded view of a first part P' of another embodiment.

Fig. 11 is a cross-sectional view of an optical drive mechanism according to another embodiment of the present invention.

Description of reference numerals:

1. 2-optical driving mechanism;

10. 10' to the bottom plate;

101' -flange structure;

11-a fixed part;

20-outer frame;

30-a movable part;

31-a base;

31B to the lower surface;

311 to the body;

312-convex column;

32-a bearing part;

33-inner frames;

34-a first reed;

341-inner chord structure;

342-outer chord structure;

343-bending structure;

35-a second reed;

A-A, B-B-line segment;

c, a coil;

ED-electromagnetic drive component;

m-a magnetic element;

m1-viscose glue;

n-diagonal;

o-optical axis;

p, P' to a first component;

q, Q' center axis;

r1-first engaging part;

r2-second engaging part;

s, S' -an elastic member;

s1 connection part;

s2-chord arm;

s3-a protrusion;

s4-flange structure;

w-a bias assembly;

x1-upper limit position;

x2 to the lower limit position.

Detailed Description

The optical drive mechanism according to the embodiment of the present invention is explained below. It should be appreciated, however, that the present embodiments provide many suitable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments disclosed are merely illustrative of specific ways to make and use the invention, and do not delimit the scope of the invention.

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

Fig. 1 is an exploded view of an optical drive mechanism 1 according to an embodiment of the present invention. The Optical driving mechanism 1 may be disposed inside an electronic device such as a camera, a tablet pc, or a mobile phone, and may be used to carry an Optical lens (not shown), and may move the Optical lens relative to a photosensitive element in the electronic device, so as to achieve the purpose of Auto-Focusing (AF) or Optical anti-shake (OIS), thereby improving Image quality.

As shown in fig. 1 and fig. 2, the optical driving mechanism 1 mainly includes a frame 20, a movable portion 30, and a first member P (including a base plate 10, a biasing member W, and an elastic member S). The outer frame 20 is connected and disposed on the bottom plate 10, and the movable portion 30, the biasing member W and the elastic member S are disposed on the bottom plate 10 and located in the outer frame 20, and protected by the outer frame 20. The movable portion 30 can carry an optical lens, and light rays from the outside and passing through the optical lens are received by a photosensitive element in the electronic device, so that an image can be obtained. The details of the movable portion 30 will be described below, and the connection relationship between the movable portion 30 and the base plate 10 will be described later.

Please refer to fig. 1 to fig. 3, wherein fig. 3 is a cross-sectional view of the movable portion 30 in fig. 2. The movable portion 30 includes a base 31, a supporting member 32, an inner frame 33, an electromagnetic driving component ED, a first spring 34 and a second spring 35. The supporting member 32 is used for supporting an optical lens and is disposed on the base 31, and the inner frame 33 is disposed on the supporting member 32. First and

second spring pieces

34 and 35 connect base 31 and carrier 32, and sandwich carrier 32 therebetween. The electromagnetic driving component ED includes a coil C and a plurality of magnetic elements M (e.g., magnets) respectively disposed on the supporting element 32 and the inner frame 33, in detail, the coil C is sleeved on the supporting element 32, and the four magnetic elements M are connected to the inner frame 33 through upper surfaces thereof and correspond to the coil C.

It should be noted that the magnetic element M and the inner frame 33 can be connected by applying an adhesive (e.g., a transparent adhesive). Specifically, as shown in fig. 4, when the magnetic element M is disposed in the inner frame 33, the upper surface of the portion of the magnetic element M is exposed from the inner frame 33 when viewed from the optical axis O direction of the optical lens, and at this time, an adhesive M1 can be directly applied to the upper surface from above, so that the magnetic element M is connected to the inner frame 33. Therefore, since the inner frame 33 exposes a portion of the magnetic element M, the adhesive M1 can be directly applied from above, and compared with the way that the magnetic element M is adhered only by the inner side wall of the inner frame 33, or the way that the adhesive M1 is applied to the magnetic element M from below the inner frame 33, the present embodiment has the effects of simplifying the assembly process and preventing or preventing the adhesive M1 from overflowing downwards along the inner frame 33. In one embodiment, the adhesive M1 may be spread over or partially applied to the upper surface of the magnetic element M exposed by the inner frame 33. In addition, the first spring 34 disposed between the magnetic element M and the inner frame 33 can be attached to the outer frame 33 to simplify the assembly process.

In the present embodiment, the coil C may receive a driving signal (e.g., a current) applied by an external power source (not shown), so as to generate a magnetic force with the magnetic element M, so that the electromagnetic driving component ED may drive the supporting member 32 and the optical lens disposed therein to move together along the optical axis O direction (Z axis) of the optical lens relative to the base 31, thereby achieving an auto-focusing function, or when the optical lens shakes, a good compensation effect may be obtained by the moving mechanism, so as to achieve the purpose of preventing hand shake. In addition, the first spring 34 and the second spring 35 can keep the carrier 32 at an initial position relative to the base 31 before the driving signal is applied. In addition, the inner frame 33 connected to the magnetic element M may have a magnetic conductive material, or elements with a magnetic conductive material may be embedded in the side walls facing the magnetic element M, so as to increase the mechanical strength of the inner frame 33, and concentrate the magnetic force of the magnetic element M disposed in the inner frame 33 in a predetermined direction, so as to enhance the magnetic force for driving the carrying element 32 to move.

Fig. 5 is a schematic view of the carrier 32 connected to the base 31 via the first spring 34 and the second spring 35. The base 31 has four protruding columns 312 disposed at four corners of the body 311, and the first spring 34 and the second spring 35 connect the protruding columns 312 and the bearing 32, so that the bearing 32 is movably connected to the base 31. It is noted that the first spring 34 has an inner chord structure 341, an outer chord structure 342 and a bending structure 343. The outer chord 342 is a substantially rectangular frame disposed on the convex pillar 312, and the inner chord 341 is a substantially circular frame disposed on the supporting member 32. The bending structure 343 connects the inner chord structure 341 and the outer chord structure 342.

It is noted that, when the optical driving mechanism 1 is viewed from the direction of the optical axis O (the outer frame 20 is omitted), as shown in fig. 6, the inner frame 33 exposes the folding structures 343 of the bearing member 32 and the first spring 34, and the inner frame 33 does not overlap with the bearing member 32 in the direction of the optical axis O.

The movement of the carrier 32 of the movable portion 30 will be described in detail below.

Referring to fig. 7 and 8, when the electromagnetic driving component ED drives the supporting element 32 (carrying the optical lens) to move upward along the optical axis O relative to the base 31 and the inner frame 33, the supporting element 32 may protrude from (be higher than) the inner frame 33, and the supporting element 32 is limited at an upper limit position X1 by the outer frame 20 (the supporting element 32 is limited by touching/contacting the outer frame 20 when moving upward).

Similarly, when the electromagnetic driving component ED drives the carrier 32 (carrying the optical lens) to move downward along the optical axis O relative to the base 31 and the inner frame 33, the carrier 32 protrudes from the lower surface 31B of the base 31, and the carrier 32 is limited to a lower limit position X2 by the elastic member S (the carrier 32 is limited when moving downward through the base 31 and touching/contacting the elastic member S). Therefore, compared to the conventional method of using the inner frame and the base to limit the supporting element, the supporting element 32 in the present embodiment does not use the inner frame 33 and the base 31 as a limiting mechanism (the supporting element 32 does not contact with the inner frame 33 and the base 31), but uses the outer frame 20 and the elastic element S to limit the movement, so that the moving distance (the direction of the optical axis O) of the supporting element 32 in the outer frame 20 is effectively increased, the auto-focusing and anti-shake function of the optical driving mechanism 1 is further enhanced, and the thickness of the base 31 and the inner frame 33 in the direction of the optical axis O can be reduced, thereby achieving the purpose of miniaturization.

In one embodiment, the lower surface 31B of the base 31 can be engaged with the elastic member S, and when the supporting member 32 moves downward to the lower limit position X2, the supporting member 32 contacts the elastic member S and is parallel to the lower surface 31B.

As shown in fig. 8, the bottom surface 31B of the base 31 has a plurality of first engaging portions R1, the elastic member S has a plurality of second engaging portions R2, and the first engaging portions R1 and the second engaging portions R2 are matched with each other in pairs. When the base 31 is assembled with the elastic element S, the first engaging portion R1 and the second engaging portion R2 can be used as a positioning mechanism to improve the assembly accuracy, and the contact area between the two portions can be increased, so that the connection strength is improved. In addition, a glue containing groove can be respectively arranged on the first clamping part R1 and the second clamping part R2 according to requirements, so that the glue used for connection is not easy to flow to other components. In the present embodiment, the first engaging portion R1 is a protruding structure, and the second engaging portion R2 is a recessed structure; in another embodiment, the first engaging portion R1 and the second engaging portion R2 can be a concave structure and a convex structure, respectively.

The connection relationship between the movable portion 30 and the base plate 10 will be described below.

Referring to fig. 2 and 9, the base plate 10 has a central axis Q, and the central axis Q coincides with the optical axis O when the optical lens in the movable portion 30 is at the initial position. The base plate 10 may be a Flexible printed Circuit Board (Flexible printed Circuit Board) disposed below the base 31 of the movable portion 30, and the elastic element S and the biasing element W are disposed on the base plate 10 and between the base plate 10 and the base 31 of the movable portion 30, so that the base plate 10 and the base 31 can be connected to each other through the biasing element W and the elastic element S.

Specifically, as shown in fig. 2 and 8, the bias element W has four elongated bias lines correspondingly disposed on four sides of the bottom plate 10 having a rectangular structure, and two ends of each bias line respectively connect the fixing portion 11 of the bottom plate 10 and the connecting portion S1 of the elastic element S, wherein the fixing portion 11 and the connecting portion S1 extend in the direction of the optical axis O (Z axis) of the optical lens. The elastic member S is disposed between the base plate 10 and the base 31 and connects the two.

The bias assembly W connecting the base plate 10 and the movable portion 30 is, for example, a plurality of wires made of Shape Memory Alloy (SMA), and the length thereof can be changed by applying a driving signal (e.g., current) thereto through an external power source (not shown). For example, when the bias element W is heated by applying the driving signal, the bias element W may be deformed to be elongated or shortened; when the driving signal is stopped, the bias element W can be restored to the original length. In other words, by applying a suitable driving signal, the length of the biasing component W can be controlled to move the movable portion 30 (including the bearing element 32, bearing the optical lens) relative to the base plate 10, so as to change the posture of the movable portion 30, and thus the optical driving mechanism 1 has the function of anti-shake and shake compensation.

The material of the bias element W may include, for example, titanium-nickel alloy (TiNi), titanium-palladium alloy (TiPd), titanium-nickel-copper alloy (TiNiCu), titanium-nickel-palladium alloy (TiNiPd), or a combination thereof.

Referring to fig. 2 and 8, the elastic element S (e.g., a leaf spring) is made of metal and has a substantially rectangular structure, and includes two L-shaped chord arms S2 and a protrusion S3, which are respectively connected to the movable portion 30 and the bottom plate 10. The elastic members S (e.g., the chord arms S2 and the protrusions S3 thereof) may be connected to wires (not shown) formed on the base plate 10 and the base 31 of the movable portion 30, and the wires may be formed on the base plate 10/the base 31 by Insert Molding (Insert Molding) or three-dimensional Molded interconnection (3D Molded interconnection Device) technology, so that the elastic members S can respectively and independently electrically connect the four bias wires to form four independent loops. Whereby independent driving signals (e.g., currents) can be applied to the respective bias lines by an external power source to change their lengths, respectively, so as to move the movable portion 30 relative to the base plate 10.

It should be noted that, since the aforementioned leads are formed on the base plate 10/the base 31 by insert molding or three-dimensional molding, the number of the components of the optical driving mechanism 1 can be reduced and the volume thereof can be greatly reduced due to the additional leads.

As shown in fig. 8, four bias lines of the bias element W are respectively disposed on different four sides of the base plate 10 corresponding to the four sides of the lower surface 31B of the base 31 (fig. 2), and a fixing portion 11 and a connecting portion S1 are formed on each side of the base plate 10, and the bias lines connect the fixing portion 11 and the connecting portion S1. Specifically, the two fixing portions 11 and the two connecting portions S1 are respectively located at four corners of the bottom plate 10, and are disposed in a staggered manner (i.e., a connecting portion S1 and a fixing portion 11 are disposed at any two adjacent corners). Further, the substantially rectangular bottom plate 10 has a diagonal line N, and the four bias lines and the connecting portions S1 of the elastic members S are arranged substantially symmetrically to the diagonal line N.

In addition, the opening of the elastic element S is formed with a flange structure S4, which is circular or approximately circular and extends along the central axis Q/optical axis O. As shown in fig. 6 and 7, the flange structure S4 is accommodated in the carrier 32, and overlaps the carrier 32 in a direction perpendicular to the optical axis O and is closer to the central axis Q/the optical axis O than the carrier 32. By forming the flange structure S4, it is able to prevent or reduce the foreign objects from entering into the carrier 32 and affecting the optical lens, thereby greatly improving the quality of the product.

Referring to fig. 2 and 9, when a proper driving signal is applied to the biasing element W, the biasing element W changes its shape (e.g., shortens or extends), so that the movable portion 30 (and the optical lens carried by the movable portion) moves relative to the base plate 10, thereby achieving the optical anti-shake function.

The movement of the movable portion 30 relative to the base plate 10 may include: the movable portion 30 translates in a direction substantially perpendicular to the central axis Q; and the movable portion 30 rotates about the central axis Q. By applying an appropriate drive signal to control the amount of deformation of each bias line of the bias assembly W, the movable portion 30 is made movable on a plane (XY plane) substantially perpendicular to the central axis Q of the base plate 10 to have an effect of shake compensation. In addition, since the base plate 10 and the movable part 30 are connected by the elastic member S, the movable part 30 is maintained at an initial position with respect to the base plate 10 when the driving signal has not been applied to the biasing member W.

In some embodiments, the optical driving mechanism 1 may further include a positioning component (not shown) having a first positioning element and a second positioning element respectively disposed on the base plate 10 and the movable portion 30 (e.g. the lower surface 31B of the base 31), which are matched with each other. The first displacement element may be one of a permanent magnet and a Hall Effect Sensor (Hall Effect Sensor), and the second displacement element may be the other of the permanent magnet and the Hall Effect Sensor, and the Hall Effect Sensor may determine the position of the permanent magnet by detecting the change of the magnetic field of the permanent magnet, thereby detecting the position deviation of the movable portion 30 relative to the base plate 10 caused by the vibration.

Regarding the movement of the movable portion 30 relative to the base plate 10, for example, as shown in fig. 8, when appropriate driving signals are applied to two bias lines on opposite sides of the figure and the bias lines are respectively extended and contracted (the extended bias line is extended toward the connecting portion S1; the contracted bias line is contracted toward the fixing portion 11), the biasing element W drives the movable portion 30 connected to the elastic member S to translate along the direction perpendicular to the central axis Q relative to the base plate 10. Similarly, when a suitable driving signal is applied to the bias lines on the opposite sides and the bias lines are all contracted, the bias element W drives the movable portion 30 to rotate around the central axis Q relative to the base plate 10.

In another embodiment, the biasing element W may comprise only one biasing line disposed on one side of the base plate 10, and may be configured with a corresponding guiding mechanism to drive the movable portion 30 to translate or rotate relative to the base plate 10.

Fig. 10-11 are schematic diagrams of a first component P' of the optical driving mechanism 2 and cross-sectional views of the optical driving mechanism 2 according to another embodiment of the present invention. The main difference between the optical driving mechanism 2 and the optical driving mechanism 1 (fig. 1) is that the first part P' is different from the first part P, and other components are the same or substantially the same and have only slight differences in appearance, so that the description is omitted and the description is omitted.

In this embodiment, as shown in fig. 10, the bottom plate 10 'of the first part P' has a circular or substantially circular flange structure 101 'formed along the opening edge of the bottom plate 10' and extending toward the central axis Q 'of the bottom plate 10' to pass through the elastic member S ', and the elastic member S' has no flange structure S4 of the previous embodiment.

When the first component P 'is combined with the movable portion 30 and the outer frame 20, as shown in the cross-sectional view of the optical driving mechanism 2 shown in fig. 11, in the direction perpendicular to the optical axis O (or the central axis Q' of the bottom plate 10 '), the flange structure 101' overlaps the supporting member 32 and is closer to the optical axis O than the supporting member 32. By forming the flange structure 101', it is able to prevent or reduce dust, foreign matters, and particles from entering the carrier 32 to affect the optical lens, so as to improve the quality of the product.

In summary, the present invention provides an optical driving mechanism for driving an optical lens. The optical driving mechanism mainly includes a bottom plate, an outer frame, a movable portion and a bias assembly. The outer frame is connected and arranged on the bottom plate, and the movable part and the bias assembly are arranged in the outer frame. The movable part comprises a base and a bearing piece, wherein the bearing piece is used for bearing the optical lens and is movably connected with the base. The biasing assembly is connected with the bottom plate and the movable part and is used for driving the movable part to move relative to the bottom plate. When the bearing piece moves to an extreme position relative to the base, the bearing piece contacts the outer frame. The optical driving mechanism has better focusing function and optical shake compensation, thereby improving the image quality, saving the thickness of an inner frame of the movable part in the optical axis direction and greatly reducing the volume of the optical driving mechanism.

Ordinal numbers such as "first," "second," etc., in the specification and claims are not to be given a sequential order, but are merely used to distinguish two different elements having the same name.

The embodiments described above are described in sufficient detail to enable those skilled in the art to practice the disclosed apparatus, and it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.

Claims

1. An optical driving mechanism for driving an optical lens, comprising:

a base plate;

a movable portion disposed on the bottom plate and movable relative to the bottom plate, comprising:

a base, which is formed with a plurality of first clamping parts; and

a bearing element for bearing the optical lens and movably connected with the base;

the elastic piece is connected with the bottom plate and the base, the lower surface of the base is attached to the elastic piece, and a plurality of second clamping parts are formed on the elastic piece and respectively correspond to the first clamping parts; and

a bias assembly connected to the base plate and the movable part for driving the movable part to move relative to the base plate;

when the bearing piece moves to a lower limit position relative to the base, the bearing piece contacts the elastic piece, the bearing piece protrudes out of the lower surface of the base, and the first clamping parts and the second clamping parts are respectively provided with a glue containing groove, so that adhesive used for connection is not easy to flow to other components.

2. The optical driving mechanism as claimed in claim 1, further comprising a frame connected to and disposed on the base plate, and the movable portion is disposed in the frame, wherein the supporting member contacts the frame when the supporting member moves to an upper limit position relative to the base.

3. The optical driving mechanism as claimed in claim 2, wherein the movable portion further comprises an inner frame disposed on the base, and the inner frame does not overlap with the supporting member in an optical axis direction of the optical lens.

4. The optical drive mechanism of claim 3, wherein the carrier protrudes from the inner frame when the carrier is moved to the upper limit position.

5. The optical driving mechanism as claimed in claim 3, wherein the supporting member does not directly contact with the base and the inner frame when the supporting member moves along the optical axis in the outer frame.

6. The optical driving mechanism according to claim 3, wherein the inner frame comprises a magnetic material.

7. The optical driving mechanism as claimed in claim 3, wherein the movable portion further comprises an electromagnetic driving component disposed on the inner frame and the supporting member for driving the supporting member to move relative to the base, and the electromagnetic driving component has at least one magnetic element disposed in the inner frame, and the magnetic element is exposed from the inner frame in the optical axis direction.

8. The optical driving mechanism as claimed in claim 3, wherein the movable portion further comprises a first spring having a bending structure connecting the supporting member and the inner frame, and the inner frame exposes the bending structure in the optical axis direction.

9. The optical driving mechanism as claimed in claim 1, wherein the first engaging portions and the second engaging portions are engaged with each other.

10. The optical driving mechanism as claimed in claim 1, wherein an opening of the elastic member is formed with a flange structure extending toward the base.

11. The optical driving mechanism as claimed in claim 10, wherein the flange structure of the elastic member overlaps the supporting member in a direction perpendicular to an optical axis of the optical lens.

12. The optical driving mechanism as claimed in claim 1, wherein the base plate has a flange structure passing through the elastic member.

13. The optical driving mechanism as claimed in claim 12, wherein the flange structure of the base plate overlaps the carrier in a direction perpendicular to an optical axis of the optical lens.

14. The optical drive mechanism of claim 1, wherein the biasing element comprises a memory alloy material.

15. The optical driving mechanism as claimed in claim 1, wherein the biasing element drives the movable portion to move in a direction perpendicular to an optical axis of the optical lens, or drives the movable portion to rotate around the optical axis.