CN108957678B

CN108957678B - Optical drive mechanism

Info

Publication number: CN108957678B
Application number: CN201810211592.XA
Authority: CN
Inventors: 许一太; 翁智伟; 宋欣忠
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2017-05-19
Filing date: 2018-03-15
Publication date: 2021-10-15
Anticipated expiration: 2038-03-15
Also published as: CN108957678A

Abstract

An optical driving mechanism for driving an optical assembly includes a base, a movable portion and a driving portion. The movable part is arranged on the base and connected with the base, and comprises a bearing piece for bearing the optical component, a magnetic component and a fixing piece, wherein the magnetic component and the fixing piece are arranged on the bearing piece, and the fixing piece is made of magnetic conductive materials. The driving part is used for driving the movable part to move relative to the base and comprises a piezoelectric component and a supporting piece, wherein the supporting piece is connected with the piezoelectric component, and the piezoelectric component and the supporting piece are arranged on the base and connected with the movable part. The fixing piece is in contact with the supporting piece through a magnetic attraction force between the magnetic assembly and the fixing 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 driving a carrier by a piezoelectric element.

Background

With the development of technology, many electronic devices (such as 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 user may shake, and an image captured by the lens module is blurred, so that a good lens shockproof mechanism is an important issue. Conventionally, a piezoelectric driving Mechanism (Smooth Impact Drive Mechanism) is provided in an electronic device to correct or focus the lens shake. However, most of the conventional piezoelectric driving mechanisms rely on a spring to hold the piezoelectric element, but the spring is easily permanently deformed when being subjected to external strong impact or impact, which may cause the spring not to stably hold the piezoelectric element, or even the entire spring is not in contact with the piezoelectric element, so that the driving mechanism cannot normally operate. As electronic products of high quality are required, it is important to provide a highly stable driving mechanism having excellent shock resistance in an electronic device.

Disclosure of Invention

It is an object of the present invention to provide an optical drive mechanism that solves at least one of the problems set forth above.

The invention provides an optical driving mechanism which is arranged in an electronic device and used for driving an optical component. The movable part is arranged on the base and connected with the base, and comprises a bearing piece for bearing the optical component, a magnetic component and a fixing piece, wherein the magnetic component and the fixing piece are arranged on the bearing piece, and the fixing piece is made of magnetic conductive materials. The driving part is used for driving the movable part to move relative to the base and comprises a piezoelectric component and a supporting piece, wherein the supporting piece is connected with the piezoelectric component, and the piezoelectric component and the supporting piece are arranged on the base and connected with the movable part. The fixing piece is in contact with the supporting piece through a magnetic attraction force between the magnetic assembly and the fixing piece.

In one embodiment, the fixing member has a fixing portion, a corresponding portion and a contact portion, the fixing portion and the supporting member are fixed to each other, the corresponding portion is attracted to the magnetic member by a magnetic attraction force, and the contact portion contacts the supporting member, wherein the corresponding portion is located between the fixing portion and the contact portion.

In one embodiment, the fixing member completely covers the magnetic element in a direction perpendicular to an optical axis of the optical element.

In an embodiment, the movable portion further includes a sliding member disposed on the supporting member and contacting the supporting member.

In an embodiment, the optical driving mechanism further includes a plurality of fixing members, wherein the sliding member and the fixing members form at least three contact regions with the supporting member.

In one embodiment, the optical driving mechanism further includes a plurality of fixing members disposed at the side of the supporting member, and the fixing members and the sliding members form at least three contact regions with the supporting member.

In an embodiment, the fixing member has an L-shaped structure, and a distal end of the L-shaped structure corresponds to another magnetic component disposed on the supporting member.

In an embodiment, the optical driving mechanism further includes a positioning element adjacent to the fixing element and corresponding to the magnetic element.

In an embodiment, the optical driving mechanism further includes a circuit board assembly disposed on the base, and the circuit board assembly and the driving portion are located on the same side of the base, wherein the alignment assembly is disposed on the circuit board.

In one embodiment, the piezoelectric element directly contacts the circuit board element.

In an embodiment, the optical driving mechanism is configured to drive a plurality of optical elements, and further includes: a plurality of driving parts and a plurality of movable parts. The base is of a substantially rectangular structure, the driving part and the movable part are arranged on the base, and the driving part is arranged on the same side of the base and is respectively positioned at two adjacent corners of the base.

The invention provides another optical driving mechanism for driving an optical assembly, which mainly comprises a base, a movable part and a driving part. The base comprises a second magnetic component. The movable part is arranged on the base and connected with the base, and comprises a bearing piece for bearing the optical component and a second magnetic component, wherein the second magnetic component is arranged on the bearing piece and corresponds to the first magnetic component, and a magnetic repulsive force is arranged between the second magnetic component and the first magnetic component. The driving part is used for driving the movable part to move relative to the base and comprises a piezoelectric component and a supporting piece, wherein the supporting piece is connected with the piezoelectric component, and the piezoelectric component and the supporting piece are arranged on the base and connected with the movable part. Wherein the carrier contacts the support by the aforementioned magnetic repulsive force.

In an embodiment, the base further includes a plurality of first magnetic elements, the movable portion further includes a plurality of second magnetic elements, the first and second magnetic elements are corresponding to each other, and a plurality of magnetic repulsive forces in different directions are provided between the first and second magnetic elements.

In an embodiment, the optical driving mechanism is used for driving a plurality of optical elements, and further includes a plurality of driving portions and a plurality of moving portions. The base is of a roughly rectangular structure, the driving part and the movable part are arranged on the base, and the driving part is arranged on the same side of the base and is respectively positioned at two adjacent corners of the base.

In an embodiment, the optical driving mechanism is used for driving a plurality of optical elements, and further includes a plurality of driving portions and a plurality of moving portions. The base is of a roughly rectangular structure, the driving part and the movable part are arranged on the base, and the driving part is arranged on different sides of the base and is positioned at the corners of the base in two diagonal directions.

The optical driving mechanism has the beneficial effects that the fixing piece contacts the supporting piece through the magnetic attraction between the magnetic assembly and the fixing piece, so that the situation that the fixing piece cannot be clamped or contacted with the driving part due to permanent deformation caused by external force impact, impact and the like can be avoided or reduced, and the excellence of the optical driving mechanism is greatly improved. In addition, in another embodiment, the optical driving mechanism comprises a plurality of magnetic elements: the first magnetic assembly and the second magnetic assembly are respectively arranged on the base and the bearing piece, and the bearing piece is contacted with the supporting piece through a magnetic repulsive force between the first magnetic assembly and the second magnetic assembly, so that the bearing piece stably abuts against the driving part.

Drawings

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

Fig. 2-3 are schematic diagrams of the optical drive mechanism assembly of fig. 1 (with the outer frame 50 omitted).

Fig. 4 is a partial schematic view of another viewing angle of fig. 2.

Fig. 5 is a schematic diagram of an optical driving mechanism 2 according to another embodiment of the present invention.

Fig. 6A-6B are schematic views (different viewing angles) of an optical driving mechanism 3 according to another embodiment of the present invention.

Fig. 7 is a schematic diagram of an optical driving mechanism 4 according to another embodiment of the present invention.

Fig. 8 is a schematic diagram of an optical driving mechanism 5 according to another embodiment of the present invention.

Fig. 9 is an exploded view of the optical driving mechanism 6 according to another embodiment of the present invention.

Fig. 10 is a schematic view of the optical drive mechanism assembly of fig. 9 (with the outer frame 50 omitted).

Fig. 11 is a schematic diagram of an optical driving mechanism 7 according to another embodiment of the present invention.

Fig. 12 is a schematic diagram of an optical driving mechanism 8 according to another embodiment of the present invention.

Fig. 13 is a schematic diagram of an optical driving mechanism 9 according to another embodiment of the invention.

Fig. 14 is a schematic view of an optical driving mechanism 9X according to another embodiment of the invention.

The reference numbers are as follows:

1-9, 9X-optical drive mechanism;

10-base;

10-1 to 10-4 to the protrusion;

30-a movable part;

31. 32-side edge;

35. 35' to a slide;

40. 40 ', 40' to a fixture;

401. 401' to a fixed portion;

402. 402', 404 "-corresponding portions;

403. 403' contact portion;

50 to a shell;

60. 60' to a piezoelectric assembly;

70-a support member;

80-weight hammer;

a1, A2, A3 and A4 are in the directions of arrows;

d, a driving part;

f, a circuit board assembly;

m-magnetic component;

m1, M2-a first magnetic component and a second magnetic component;

m5-shared magnetic element;

o-optical axis;

p-alignment assembly;

p1, P2, P3, P4 and P5-contraposition assembly;

r1-groove;

r2-convex part;

v-a movable part;

w-a wire.

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 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 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. In addition, in the drawings or the description, the same reference numerals are used for similar or identical parts.

Example 1

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 computer, or a mobile phone, and may be used to carry an Optical element (e.g., an Optical lens, not shown), and move the Optical element relative to a photosensitive element (Image Sensor) in the electronic device, so as to achieve the purpose of Auto-Focusing (AF) or Optical Image Stabilization (OIS), thereby improving Image quality.

As shown in fig. 1, the optical driving mechanism 1 mainly includes a housing 50, a base 10, a movable portion V and a driving portion D. The movable portion V and the driving portion D are disposed on the base 10 and are located and protected by the housing 50. The movable portion V includes a supporting member 30 for supporting an optical component (e.g., an optical lens), and an image can be obtained by receiving light (from the optical axis O direction of the optical component) from the outside through a photosensitive component (not shown; e.g., disposed below the base 10) in the electronic device.

Please refer to fig. 1-2, wherein fig. 2 is a schematic diagram of the optical driving mechanism 1 of fig. 1 after assembly (the housing 50 is omitted). The movable portion V is connected to a driving portion D, wherein the movable portion V includes the carrier 30, a magnetic component M and a fixing member 40, and the driving portion D includes a piezoelectric component (piezoelectric element)60, a supporting member 70 and a weight 80. It should be noted that the driving portion D in the present embodiment is, for example, a piezoelectric driving element (SIDM Assembly), and by applying a driving signal (e.g., a driving current) to the piezoelectric element 60 in the driving portion D, the piezoelectric element 60 can be deformed, e.g., extended or shortened, so as to Drive the movable portion V (including the supporting element 30 and the optical element carried by the supporting element) to move relative to the base 10, thereby achieving the purpose of optical focusing and shake compensation. The connection relationship between the movable portion V and the driving portion D and the base 10 will be described in detail below.

Referring to fig. 2, the driving portion D and the movable portion V are disposed on the base 10 and surrounded by four protrusions (or studs) 10-1, 10-2, 10-3, and 10-4 of the base 10. The supporting member 70 of the driving portion D has a cylindrical structure, is interposed between the bearing member 30 and the protruding portion 10-1, and is in contact with the fixing member 40. The fixing member 40, for example, a rod-shaped elastic sheet with magnetic conductivity, is disposed on one side 31 of the supporting member 30, and is used for pressing the supporting member 70 on the supporting member 30 (for example, the side 31 thereof) to make it stably abut against the supporting member 30.

In addition, as shown in fig. 3, a Circuit Board Assembly F, such as a Flexible Printed Circuit Board Assembly (FPCBA), is disposed on the other side of the base 10 (i.e., the side opposite to the side where the fixing element 40 and the driving portion D are disposed), and is connected to the piezoelectric element 60 of the driving portion D through a wire W, and a driving signal (e.g., a current) is applied to the piezoelectric element 60 to generate an elongation or contraction deformation, so as to drive the movable portion V to move relative to the base 10, thereby achieving the purpose of focusing and shock resistance.

It is noted that the protrusion 10-3 of the base 10 has a reversed-U-shaped groove R1, and the carrier 30 has a protrusion R2, the groove R1 and the protrusion R2 are matched with each other. When the carrier 30 is assembled on the base 10, the matching (or engagement) of the groove R1 and the protrusion R2 can provide a good positioning mechanism and improve the assembling tightness of the optical driving mechanism 1.

In the present embodiment, the optical driving mechanism 1 further includes a positioning assembly P, which includes two positioning assemblies P1, P2 respectively disposed on the base 10 and the movable portion V (e.g., respectively disposed on the outer side of the protrusion 10-2 of the base 10 and the carrier 30 of the movable portion V), as shown in fig. 2-3, and the two positioning assemblies P are matched with each other. The alignment element P1 may be one of a permanent magnet and a Hall Effect Sensor (Hall Effect Sensor), and the alignment element P2 may be the other of the two, and the Hall Effect Sensor may determine the position of the permanent magnet by detecting the magnetic field variation of the permanent magnet, thereby detecting the position deviation of the movable portion V relative to the base 10 caused by vibration. In another embodiment, other types of alignment elements/components, such as a Magnetoresistive Sensor (MRS) or an Optical Sensor (Optical Sensor), may be used to detect the relative position of the movable portion V and the base 10.

For example, when a suitable driving signal is applied to the piezoelectric element 60 to extend the piezoelectric element, the supporting element 70 disposed on the piezoelectric element 60 moves upward along the optical axis O (Z axis), and then the piezoelectric element 60 and the supporting element 70 drive the movable portion V to move to a predetermined height (position) along the optical axis O; when a suitable driving signal is applied to the piezoelectric element 60 to rapidly shorten the piezoelectric element, the support member 70 returns to the initial position, and the movable portion V can be maintained at the predetermined height. By repeatedly executing the driving signal of the extension and contraction voltage component 60, the position of the movable part V relative to the base 10 can be adjusted, so that the optical moving mechanism has good focusing and shaking compensation functions.

It should be noted that, on the side 31 of the base 10 facing the fixing member 40, a magnetic component M (e.g. a magnet) is disposed, and a magnetic attraction force is provided between the fixing member 40 and the magnetic component M, which makes the fixing member 40 more stably hold the support member 70 in a direction perpendicular to the optical axis O (as indicated by arrow a1), and more specifically, the fixing member 40 can be divided into at least three parts: a fixed portion 401, a corresponding portion 402 and a contact portion 403, the fixed portion 401 and the carrier 30 are fixed to each other, the corresponding portion 402 is attracted to the magnetic component M by the aforementioned magnetic attraction force, and the contact portion 403 is in contact with the support 70. In this way, when the optical driving mechanism 1 disposed in the electronic device is subjected to an external strong impact or impact, the fixing member 40 can be kept firmly clamping/contacting the supporting member 70 of the driving portion D by the magnetic attraction between the fixing member 40 and the magnetic component M, so as to prevent the fixing member 40 from being permanently deformed and unable to contact or stably clamp the supporting member 70.

Fig. 4 is a partial schematic view of another view of fig. 2 and omits the projection 10-1 of the base 10. As can be seen from fig. 1 and 4, a slider 35 (having a V-shaped configuration) is provided on the side of the carrier and is in contact with the support 70. The sliding member 35 has a smooth surface (smooth surface), and the support member 70 forms at least three contact regions with the sliding member 35 by the contact of the fixing member 40 and the sliding member, so as to stably clamp the support member 70. The driving unit D includes a weight 80 disposed below the piezoelectric element 60 to protect the piezoelectric element. The weight 80 may be made of a metal material, for example, and provides an effect of stabilizing the entire driving portion D.

As described above, the fixing member 40 has a force pressing on the supporting member 30 by the magnetic attraction force generated by the fixing member 40 and the magnetic assembly M on the supporting member 30, so as to avoid or reduce the situation that the fixing member 40 cannot clamp or contact the driving portion D due to permanent deformation (impact, shock, etc.) and greatly improve the quality of the optical driving mechanism 1.

Example 2

Fig. 5 is a schematic diagram of an optical drive mechanism 2 according to another embodiment. The main difference between this embodiment and the previous embodiment (fig. 1) is that the fixing member 40' of the optical driving mechanism 2 is different from the fixing member 40, and the outer frame 50 is omitted for clearly seeing the structure of the optical driving mechanism 2. Other components are the same or substantially the same, and have slightly different shapes, so that the description is omitted and will be described in the first place. Compared to the aforementioned fixing element 40, the corresponding portion 402 'of the fixing element 40' has a larger area, and the width in the direction of the optical axis O (Z axis) is larger than the fixing portion 401 'and the contact portion 403', and completely covers the magnetic element M (in the direction perpendicular to the optical axis O), so that a stronger magnetic attraction force can be generated between the magnetic element M and the fixing element 40 'through the larger corresponding area, so as to fix the clamping support 70 more firmly by the fixing element 40'.

Example 3

In another embodiment, as shown in fig. 6A-6B, an optical driving mechanism 3 further includes two supporting members 40 and two magnetic assemblies M corresponding to the supporting members 40, which are respectively disposed on two

adjacent sides

31, 32 of the supporting member 30, and the supporting members 40 can be more stably clamped to the supporting member 70 by a plurality of magnetic attraction forces generated by the two supporting members 40 and the two magnetic assemblies M. In addition, as shown in fig. 6B, the two supporting members 40 and the sliding member 35' (having a strip structure) form at least three contact areas with the supporting members 70 to improve the stability of the clamping supporting members 70, and the base 10 of the present embodiment does not have the protrusion 10-1 (fig. 1), but only has three protrusions 10-2 to 10-4, so as to reduce the volume of the whole mechanism.

Example 4

In another embodiment, as shown in fig. 7, an optical driving mechanism 4 includes a support 40 "having an L-shaped structure, which forms at least two contact areas with the support 70, and another corresponding portion 404" is formed at the end of the L-shaped structure, which is attracted by magnetic attraction generated between the other magnetic component M on the carrier 30 to stabilize the driving portion D.

Example 5

In another embodiment, as shown in fig. 8, the driving portion D of an optical driving mechanism 5 is disposed on the same side of the carrier 30 as the circuit board assembly F, and the piezoelectric element 60' is connected to the circuit board assembly F disposed on the base 10 (which may be in direct contact to save the wires W as in the first embodiment). It should be noted that a pair of positioning elements P3 on the circuit board element F and the magnetic element M form a pair of positioning elements P for determining the relative position of the movable portion V with respect to the base 10. As such, the magnetic component M has two functions: first, in order to generate a magnetic attraction force with the fixing member 40 to fix the fixing member 40 to the support member 70, and second, in order to form an alignment element P with the alignment element P3, the detection of the relative position of the movable portion V and the base 10 is provided. With such a configuration, the overall size of the optical driving mechanism 5 can be reduced (since the driving portion D and the circuit board assembly F are both disposed on the same side of the supporting member 30), and the magnetic assembly M can be used as one of the alignment assemblies P, so as to reduce the number of the alignment assemblies.

Example 6

Fig. 9-10 are exploded views of an optical driving mechanism 6 according to another embodiment of the present invention and the assembled schematic view thereof (the outer frame 50 is omitted). The main difference between the optical driving mechanism 6 and the optical driving mechanism 1 (fig. 1) is that the optical driving mechanism 6 includes a plurality of magnetic components: the first magnetic assembly M1 and the second magnetic assembly M2 are respectively disposed in the groove R1 of the protrusion 10-3 of the base 10 and the protrusion R2 of the carrier 30. In addition, the optical drive mechanism 6 does not have the fixing member 40 of the optical drive mechanism 1. Other components are the same or substantially the same, and have slightly different shapes, so that the description is omitted and will be described in the first place.

In detail, referring to fig. 10, a magnetic repulsive force is generated between the first and second magnetic elements M1, M2 (such as magnets) of the optical driving mechanism 6, and the first and second magnetic elements M1, M2 repel each other, so that the supporting member 30 is pressed against the supporting member 70 and the protrusion 10-1 in the arrow direction a2 of fig. 10. In this way, the supporting member 70 is sandwiched between the protrusion 10-1 and the supporting member 30 (the supporting member 30 contacts the supporting member 70 by the magnetic repulsive force), so that the driving portion D including the supporting member 70 can be stably clamped.

Example 7

Fig. 11 is a schematic diagram of an optical driving mechanism 7 according to another embodiment of the present invention. The optical drive mechanism 7 of the present embodiment is mainly different from the optical drive mechanism 6 (fig. 10) in that: the optical driving mechanism 7 has a plurality of first and second magnetic assemblies M1, M2, two first magnetic assemblies M1 are respectively disposed on the protrusions 10-2, 10-4, and two second magnetic assemblies M2 are disposed on different sides of the carrier 30 and correspond to the first magnetic assemblies M1. Similar to the embodiment of fig. 10, a plurality of magnetic repulsive forces are respectively generated between the two first and second magnetic assemblies M1, M2 of the present embodiment, and these magnetic repulsive forces are the forces of the carrier 30 pushing the supporting element 70 in the directions of arrows A3 and a4 (different directions), so that the carrier 30 tightly abuts against the supporting element 70, and the supporting element 70 can be stably clamped between the carrier 30 and the protrusion 10-1. In addition, the circuit board assembly F and the alignment assembly P4 (corresponding to the alignment assembly P5 disposed on the carrier 30) disposed thereon are disposed adjacent to the side 31 of the carrier 30, i.e. disposed on the same side as the driving portion D, so that the overall volume of the optical driving mechanism 7 can be reduced.

Example 8

Fig. 12 is a schematic diagram of an optical driving mechanism 8 according to another embodiment of the present invention. The optical driving mechanism 8 is used to carry and drive a plurality of optical components, and is basically composed of two optical driving mechanisms 5 (fig. 8), wherein the base 10 is used to carry two movable portions V and a driving portion D. Regarding the configuration of the 8 components of the optical drive mechanism, as shown in fig. 12, two drive portions D are disposed on the same side of the base 10 and are located approximately at two adjacent corners of the base 10.

Example 9

Fig. 13 is a schematic diagram of an optical driving mechanism 9 according to another embodiment of the present invention. The optical driving mechanism 9 is used for carrying and driving a plurality of optical components, and is basically composed of two optical driving mechanisms 7 (fig. 11), wherein the base 10 is used for carrying two movable portions V and a driving portion D. Regarding the arrangement of the 9 components of the optical drive mechanism, as shown in fig. 13, two drive portions D are provided on different sides of the base 10, and are located substantially at the corners (oblique directions) of the base 10 in the diagonal direction.

Example 9X

Fig. 14 is a schematic view of an optical driving mechanism 9X according to another embodiment of the present invention. The optical driving mechanism 9X is used for carrying and driving a plurality of optical components, and is similar to the optical driving mechanism 9 (fig. 13), wherein the main difference is that: the optical driving mechanism 9X includes a shared magnetic assembly M5 disposed between the two carriers 30, and two opposite sides of the shared magnetic assembly M5 are respectively corresponding to the two magnetic assemblies M2 disposed on the two carriers 30, so as to reduce the number of magnetic assemblies disposed and reduce the production and assembly costs.

In summary, the present invention provides an optical driving mechanism disposed in an electronic device for driving an optical element. The optical driving mechanism mainly includes a base, a movable portion and a driving portion. The movable part is arranged on the base and connected with the base, and comprises a bearing piece for bearing the optical component, a magnetic component and a fixing piece, wherein the magnetic component and the fixing piece are arranged on the bearing piece, and the fixing piece is made of magnetic conductive materials. The driving part is used for driving the movable part to move relative to the base and comprises a piezoelectric component and a supporting piece, wherein the supporting piece is connected with the piezoelectric component, and the piezoelectric component and the supporting piece are arranged on the base and connected with the movable part. The fixing piece is in contact with the supporting piece through a magnetic attraction force between the magnetic assembly and the fixing piece, so that the situation that the fixing piece cannot be clamped or contacted with the driving part due to permanent deformation caused by external force impact, impact and the like can be avoided or reduced, and the excellence of the optical driving mechanism is greatly improved. In addition, in another embodiment, the optical driving mechanism comprises a plurality of magnetic elements: the first magnetic assembly and the second magnetic assembly are respectively arranged on the base and the bearing piece, and the bearing piece is contacted with the supporting piece through a magnetic repulsive force between the first magnetic assembly and the second magnetic assembly, so that the bearing piece stably abuts against the driving part.

Ordinal numbers such as "first," "second," etc., in the specification and claims are not necessarily consecutive to each other, but are merely used to identify 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 assembly, comprising:

a base;

a movable portion connected to the base, comprising:

a bearing element for bearing the optical component;

a magnetic component arranged on the bearing piece; and

a fixing piece which is provided with a magnetic conduction material and is arranged on the bearing piece; and

a driving part for driving the movable part to move relative to the base, comprising:

a piezoelectric element;

a support member connected to the piezoelectric assembly, wherein the piezoelectric assembly and the support member are disposed on the base and connected to the movable portion;

wherein this mounting includes:

a fixed part, the fixed part and the bearing part are mutually fixed;

a contact portion contacting the support;

a corresponding part, which is attracted with the magnetic component by magnetic attraction force and is positioned between the fixed part and the contact part;

the fixing piece is in contact with the supporting piece through a magnetic attraction force between the magnetic assembly and the fixing piece.

2. The optical driving mechanism as claimed in claim 1, wherein the fixing member completely covers the magnetic element in a direction perpendicular to an optical axis of the optical element.

3. The optical driving mechanism as claimed in claim 1, wherein the movable portion further comprises a sliding member disposed on the supporting member and contacting the supporting member.

4. The optical driving mechanism as claimed in claim 3, wherein the sliding member and the fixing member form at least three contact areas with the supporting member.

5. The optical driving mechanism as claimed in claim 3, further comprising a plurality of fixing members disposed at the side of the supporting member, wherein the plurality of fixing members and the sliding member form at least three contact regions with the supporting member.

6. The optical driving mechanism as claimed in claim 1, wherein the fixing member has an L-shaped structure, and the end of the L-shaped structure corresponds to another magnetic component disposed on the supporting member.

7. The optical driving mechanism as claimed in claim 1, further comprising a pair of alignment members adjacent to the fixing member and corresponding to the magnetic members.

8. The optical driving mechanism according to claim 7, further comprising a circuit board assembly disposed on the base, wherein the circuit board assembly and the driving portion are located on the same side of the base, and the alignment assembly is disposed on the circuit board assembly.

9. The optical drive mechanism of claim 8, wherein the piezoelectric element directly contacts the circuit board element.

10. The optical drive mechanism of claim 1, wherein the optical drive mechanism is configured to drive a plurality of optical elements, further comprising:

a plurality of driving parts; and

a plurality of movable portions;

the base is of a substantially rectangular structure, the plurality of driving parts and the plurality of movable parts are arranged on the base, and the plurality of driving parts are arranged on the same side of the base and are respectively positioned at two adjacent corners of the base.