CN213213591U - Optical element driving mechanism - Google Patents

Abstract

An optical element driving mechanism comprises a fixed part, a movable part, a driving assembly, a sensing assembly and a circuit assembly. The fixing part is provided with a main shaft and a polygonal structure surrounding the main shaft. The movable part is provided with a bearing seat for bearing the optical element and can move relative to the fixed part. The driving component drives the movable part to move relative to the fixed part. The sensing component detects the movement of the movable part relative to the fixed part. The circuit component is electrically connected to the driving component and the sensing component.

Description

Optical element driving mechanism

Technical Field

The present disclosure relates to an optical element driving mechanism, and more particularly, to an optical element driving mechanism having circuit pins disposed on different sides of a base.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have a function of taking pictures or recording videos. The use of these electronic devices is becoming more common and the design direction of these electronic devices is being developed to be more convenient and thinner to provide more choices for users.

The electronic device with the photographing or video recording function is generally provided with a lens driving module to drive a lens to move along an optical axis, so as to achieve an Auto Focus (AF) function. In addition, the light can pass through the lens to form an image on a photosensitive element. However, as the size of the display of the electronic device is increased with the demand of consumers, the size of the lens driving module is required to be reduced. In order to reduce the size of the lens driving module according to the market demand, an important issue is to be solved.

SUMMERY OF THE UTILITY MODEL

The present disclosure is directed to an optical element driving mechanism for reducing the size of a lens driving module.

Some embodiments of the present disclosure provide an optical element driving mechanism, comprising: the device comprises a fixed part, a movable part, a driving assembly, a sensing assembly and a circuit assembly. The fixing part is provided with a main shaft and a polygonal structure surrounding the main shaft. The movable part is provided with a bearing seat for bearing the optical element and can move relative to the fixed part. The driving component drives the movable part to move relative to the fixed part. The sensing component detects the movement of the movable part relative to the fixed part. The circuit component is electrically connected to the driving component and the sensing component.

In one embodiment, the circuit assembly further includes: the sensor comprises a first driving component connecting element, a second driving component connecting element, a first sensing component connecting element and a second sensing component connecting element. The first driving component connecting element and the second driving component connecting element are electrically connected with the driving component and partially exposed out of the fixing part. The first sensing component connecting element and the second sensing component connecting element are electrically connected with the sensing component and are partially exposed out of the fixing part. When viewed along the main shaft, the first driving assembly connecting element and the first sensing assembly connecting element are respectively arranged on different sides of the polygonal structure.

In one embodiment, the first driving device connecting element is disposed between the first sensing device connecting element and the second sensing device connecting element.

In one embodiment, the second sensing element connecting element is disposed between the first driving element connecting element and the second driving element connecting element.

In an embodiment, when viewed along the main axis, the first sensing element connecting element and the second sensing element connecting element are respectively disposed on different sides of the fixing portion.

In one embodiment, the first driving element connecting element and the sensing element at least partially overlap when viewed along a direction perpendicular to the main axis.

In one embodiment, the first driving element connecting element and the sensing element do not overlap when viewed along the main axis.

In one embodiment, the first sensing element connecting element and the sensing element do not overlap when viewed along a direction perpendicular to the main axis.

In one embodiment, the first sensing element connecting element and the sensing element at least partially overlap when viewed along the main axis.

In one embodiment, the sensing assembly further includes a sensor disposed on the fixing portion. The aforementioned fixed portion further comprises: frame and base. The outer frame has a top surface and extends from the edge of the top surface of the base along the main axis of the base. The base is fixedly connected with the outer frame and is provided with: a base surface, a base opening, and a groove. The base surface faces the top surface. The base opening is formed in the base surface and corresponds to the optical element. The groove is recessed from the surface of the base. The sensor is arranged in the recess, and along the direction of the main shaft, the shortest distance between the surface of the base and the movable part is smaller than the shortest distance between the sensor and the movable part.

In one embodiment, the circuit element and the sensing element are disposed on the base.

In one embodiment, the first sensing element connecting element has a first elongated structure, and the second sensing element connecting element has a second elongated structure. The first elongated structure and the second elongated structure extend in a direction not parallel to the main shaft, and when viewed along the main shaft, the first elongated structure and the second elongated structure extend in different directions respectively.

In one embodiment, each side of the polygonal structure is provided with at most one of the first elongated structure and the second elongated structure.

In one embodiment, the first sensing element connecting element and the second sensing element connecting element comprise a material with weak magnetic permeability or no magnetic permeability.

In an embodiment, when viewed along the main axis, the first driving component connecting element, the first sensing component connecting element and the second sensing component connecting element are all disposed at the same corner of the fixing portion.

In one embodiment, the optical element driving mechanism further includes an elastic element, the movable portion is movably connected to the fixed portion via the elastic element, and the elastic element and the sensing assembly at least partially overlap when viewed along the main axis.

In an embodiment, the optical element driving mechanism further includes an elastic element. The fixing part also comprises an outer frame which is provided with a top surface and is positioned above the movable part. The bearing seat is provided with a plurality of contacts, the elastic element is connected to the bearing seat through the contacts, and when the elastic element is observed along the main shaft, the top surface and the contacts are not overlapped.

In one embodiment, the sensing assembly further comprises a reference element having a pair of poles, and a connection line connecting the poles is parallel to the main axis.

In one embodiment, the reference element is exposed from the carrier when viewed along a direction perpendicular to the main axis.

In one embodiment, the driving element and the sensing element are disposed at corners of the fixing portion when viewed along the main axis.

The beneficial effect of the present disclosure is that the embodiment of the present disclosure provides an optical element driving mechanism that sets circuit pins on different sides of a base. Through the design, the circuits for connecting different circuit pins can be arranged on different sides, the size of the base on an X-Y plane is reduced, and the miniaturization of the optical element driving mechanism is further achieved. In addition, the contact point of the bearing seat and the elastic element is arranged to be staggered with the outer frame, thereby reducing the difficulty of manufacturing the optical element driving mechanism.

In order to make the aforementioned and other objects, features and advantages of the present disclosure comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 shows a perspective view of an optical element driving mechanism according to an embodiment of the present disclosure.

Fig. 2 shows an exploded view of the optical element driving mechanism shown in fig. 1.

Fig. 3 shows a cross-sectional view along the line a-a shown in fig. 1.

Fig. 4 shows a top view of the optical element driving mechanism shown in fig. 1.

Fig. 5 shows a perspective view of the internal structure of an optical element driving mechanism according to an embodiment of the present disclosure.

Fig. 6 shows a perspective view of a base and a circuit assembly according to an embodiment of the disclosure.

Fig. 7 shows a perspective view of the internal structure of an optical element driving mechanism according to an embodiment of the present disclosure.

The reference numbers are as follows:

101 optical element driving mechanism

110 outer frame

111 top surface

112 side wall

113 opening a hole

120 base

121 base surface

122 base opening

123 groove

130 bearing seat

131 side wall

132 opening

133 contact

140 electromagnetic drive assembly

141 magnetic element

142 drive coil

150 first elastic element

160 second elastic element

170 circuit assembly

171 first drive assembly connecting element

171A electric contact

172 second drive assembly connecting element

172A electrical contact

173 first sensing assembly connecting element

173A first elongated structure

174 second sensing assembly connecting element

173B second elongated structure

180 sensing assembly

181 sensor

182 reference element

182A, 182B magnetic pole

F fixed part

M movable part

O main shaft

Detailed Description

The optical element driving mechanism of the embodiment of the present disclosure is explained below. However, it can be readily appreciated that the disclosed embodiments provide many suitable authoring concepts that can be implemented in a wide variety of specific contexts. The specific embodiments disclosed are merely illustrative of specific ways to make and use the disclosure, and do not limit the scope of the disclosure.

Furthermore, relative terms, such as "below" or "bottom" and "above" or "top," may be used in embodiments to describe one element's relative relationship to another element of the figures. It will be understood that if the device of the drawings is turned over and upside down, elements described as being on the "lower" side will be elements on the "upper" side.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, materials and/or sections, these elements, materials and/or sections should not be limited by these terms, and these terms are only used to distinguish one element, material and/or section from another element, material and/or section. Thus, a first element, material, and/or section discussed below could be termed a second element, material, and/or section without departing from the teachings of some embodiments of the present disclosure. In addition, for the sake of brevity, the terms "first", "second", and the like may not be used in the description to distinguish different elements. The first element and/or the second element recited in the claims may be construed as any element conforming to the description in the specification without departing from the scope defined by the appended claims.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood 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. Furthermore, the terms "substantially", "about" or "approximately" are also recited herein, and are intended to cover both substantially and completely consistent conditions or ranges. It should be noted that, unless otherwise defined, even if the above-mentioned terms are not described in the description, they should be interpreted in the same sense as if the above-mentioned approximate terms were described.

Fig. 1 shows a perspective view of an optical element driving mechanism 101 according to an embodiment of the present disclosure. It should be noted that the optical element driving mechanism 101 is, for example, a Voice Coil Motor (VCM), which can be disposed in an electronic device with a camera function for driving an optical element (e.g., a lens), and can have an Auto Focus (AF) function. Further, in the present embodiment, the optical element driving mechanism 101 has a substantially rectangular structure. As shown in fig. 1, the housing 110 of the optical element driving mechanism 101 has a top surface 111 and four side walls 112 extending from the edge of the top surface 111 along the main axis O. An opening 113 corresponding to an optical element (not shown) is provided on the top surface 111. That is, the light can pass through the opening 113 via a main axis O and enter the optical element driving mechanism 101. It should be understood that in other embodiments, the optical element drive mechanism 101 may have a polygonal configuration about the primary axis O.

Fig. 2 shows an exploded view of the optical element driving mechanism 101 shown in fig. 1. As shown in fig. 2, the optical element driving mechanism 101 includes a housing 110, a base 120, a supporting base 130, a driving assembly 140, a first elastic element 150, a second elastic element 160, and a circuit assembly 170. The fixed portion F may include the outer frame 110 and the base 12, and the movable portion M may include the bearing seat 130 and the optical element carried thereby.

The outer frame 110 and the base 120 can be connected to each other and combined into a hollow box, so that the supporting base 130, the driving assembly 140, the frame 150, the first elastic element 150, and the second elastic element 160 can be surrounded by the outer frame 110 and accommodated in the box. Therefore, the frame 110, the susceptor 130 and the base 120 are sequentially arranged along the main axis O. In other words, the light beam sequentially passes through the outer frame 110, the carrying base 130 and the base 120 to reach an imaging device (not shown) disposed outside the optical element driving mechanism 101, thereby generating an image.

The supporting base 130 has a hollow structure and supports an optical element having an optical axis (parallel to the main axis O). In addition, the supporting base 130 is movably (movably) connected to the outer frame 110 and the base 120. The first elastic element 150 is disposed between the outer frame 110 and the carrying seat 130, and the second elastic element 160 is disposed between the carrying seat 130 and the base 120. More specifically, the susceptor 130 can be connected to the outer frame 110 and the base 120 through the first elastic element 150 and the second elastic element 160 made of metal respectively, so as to movably suspend the susceptor 130 between the outer frame 110 and the base 120, and the susceptor 130 can move along the main axis O between the outer frame 110 and the base 120.

The driving assembly 140 includes a driving coil 141 and a magnetic element 142, wherein the driving coil 141 can be disposed around the carrying seat 130, and the magnetic element 142 can be disposed between the outer frame 110 and the carrying seat 130. In some embodiments, the magnetic element 142 is fixed to the outer frame 110. When a current is applied to the driving coil 141, an electromagnetic driving force (electromagnetic driving force) can be generated by the driving coil 141 and the magnetic element 142, so as to drive the supporting base 130 and the optical element supported by the supporting base to move along the Z-axis (i.e., the main axis O) relative to the base 120, thereby performing an auto-focusing (AF) function. In other embodiments, the positions of the drive coil 141 and the magnetic element 142 can be interchanged. In other words, the driving coil 141 can be disposed between the outer frame 110 and the carrying seat 130, and the magnetic element 142 can be disposed on the carrying seat 130, thereby achieving the effect of auto-focusing.

The circuit assembly 170 is embedded in the base 120 and may extend outward (e.g., in a direction parallel to the major axis O) from the base 120. In addition, the sensor 181 is disposed on the base 120 and the circuit assembly 170, and forms a sensing assembly 180 with a reference element 182 (shown in fig. 3) disposed on the carrying seat 130. For example, the sensor 181 may be a Hall sensor (Hall effect sensor), a Magnetoresistive (MR) sensor, such as a Tunneling Magnetoresistive (TMR) sensor, or any other sensor capable of sensing a magnetic field.

Fig. 3 shows a cross-sectional view along the line a-a shown in fig. 1. As shown in fig. 3, the magnetic element 142 and the sensor 181 of the driving assembly 140 are disposed at the corner of the fixing portion F when viewed along the main axis O. In some embodiments, the sensor 181 and the reference element 182 are arranged along the main axis O, such that the sensor 181 can detect the position of the reference element 182, and further determine the positions of the carrier 130 and the optical element. In the present embodiment, the circuit element 170 may be electrically connected to the driving element 140 and the sensing element 180, and is configured to transmit an electrical signal.

In addition, the carrying base 130 includes a sidewall 131 configured to surround the optical element, a plurality of openings 132 are disposed on the sidewall 131, and the driving coils 141 surrounding the carrying base 130 are exposed from the openings 132. For example, the openings 132 are respectively located at each side of the optical element driving mechanism 101. In some embodiments, the openings 132 on opposite sides of the optical element driving mechanism 101 at least partially overlap, although the disclosure is not so limited. By disposing the opening 132, the size of the supporting base 130 on the X-Y plane can be effectively reduced, and the miniaturization of the optical element driving mechanism 101 can be achieved.

Fig. 4 shows a top view of the optical element driving mechanism 101 shown in fig. 1. As shown in fig. 4, the carrier 130 has a plurality of contacts 133, and the first elastic element 150 is connected to the carrier 130 through the contacts 133. In the present embodiment, the top surface 111 of the outer frame 110 and the contact 133 do not overlap when viewed along the major axis O. Through the above design, it is easier to dispose an adhesive at the contact points 133 to join the first elastic element 150 and the carrier 130 without being interfered by the outer frame 110.

Fig. 5 shows a perspective view of the base 120, the second elastic element 160 and the circuit assembly 170 according to an embodiment of the disclosure. As shown in fig. 5, the circuit assembly 170 includes a first driving assembly connecting element 171, a second driving assembly connecting element 172, a first sensing assembly connecting element 173 and a second sensing assembly connecting element 174, wherein the first driving assembly connecting element 171 and the second driving assembly connecting element 172 are electrically connected to the driving assembly 140. For example, the first driving assembly connecting element 171 and the second driving assembly connecting element 172 are electrically connected to the second elastic element 160 at the electrical contacts 171A and 172A, respectively, and further electrically connected to the driving coil 141 of the driving assembly 140. The first sensing element connecting element 173 and the second sensing element connecting element 174 are electrically connected to the sensor 181 of the sensing element 180. In the present embodiment, the first driving device connecting element 171 and the first sensing device connecting element 173 are respectively disposed on different sides of the rectangular structure as viewed along the main axis O.

In the present embodiment, the base 120 has a base surface 121 facing the top surface 111 of the housing 110 (as shown in fig. 4). A base opening 122 is formed in the base surface 121, penetrates the base 120, and corresponds to an optical element in the optical element driving mechanism 101. The base 120 further has a recess 123 recessed from the base surface 121, wherein the sensor 181 is disposed in the recess 123. In addition, the shortest distance between the base surface 121 and the susceptor 130 is smaller than the shortest distance between the sensor 181 and the susceptor 130 along the direction of the main axis O. Therefore, the carrier 130 contacts the base surface 121 when moving down to the farthest position, and does not impact the sensor 181, thereby preventing the sensor 181 from being damaged due to collision.

In addition, in the present embodiment, the second elastic element 160 and the sensor 181 at least partially overlap when viewed along the main axis O (Z axis). The first drive-assembly coupling member 171 at least partially overlaps the sensor 181 when viewed in a direction perpendicular to the principal axis O (e.g., from the electrical contact 171A toward the center of the optical-element driving mechanism 101). The first drive assembly connecting element 171 does not overlap the sensor 181 when viewed along the spindle O.

Fig. 6 shows a perspective view of the base 120 and the circuit assembly 170 according to an embodiment of the disclosure. As shown in fig. 6, the first driving device connecting element 171 is disposed between the first sensing device connecting element 173 and the second sensing device connecting element 174. The second sensing device connecting element 174 is disposed between the first driving device connecting element 171 and the second driving device connecting element 172. In the present embodiment, the first sensing element connecting element 173 and the second sensing element connecting element 174 are respectively disposed on different sides of the base 120 when viewed along the main axis O. In the present embodiment, the first driving device connecting element 171, the first sensing device connecting element 173 and the second sensing device connecting element 174 are all disposed at the same corner of the base 120.

In addition, the first sensing element connecting element 173 has a first elongated structure 173A, and the second sensing element connecting element 174 has a second elongated structure 174A. In this embodiment, the first and second elongated structures 173A and 174A extend in a non-parallel direction (e.g., along an X-Y plane) with respect to the primary axis O. The first and second elongated structures 173A and 174A extend in different directions when viewed along the main axis O. For example, the first bar 173A extends along the Y-axis, and the second bar 174A extends along the X-axis. In the embodiment where the optical element driving mechanism 101 has any polygonal structure, each side of the polygonal structure is provided with at most one of the first sensing element connecting element 173 and the second sensing element connecting element 174 when viewed along the main axis O. In other words, each side may be provided with the first sensing element connecting element 173 or the second sensing element connecting element 174, or may not be provided with the first sensing element connecting element 173 or the second sensing element connecting element 174.

As shown in fig. 6, the groove 123 of the base 120 exposes a portion of the first and second sensing element connecting elements 173 and 174, so as to dispose the sensor 181 on the first and second sensing element connecting elements 173 and 174. Therefore, the first sensing element connecting element 173 and the second sensing element connecting element 174 comprise a material with weak magnetic permeability or no magnetic permeability, thereby preventing the first sensing element connecting element 173 and the second sensing element connecting element 174 from affecting the operation of the sensor 181. For example, the first and second sensing element connection elements 173, 174 comprise steel, nickel, copper, aluminum, any other suitable metallic material, or a combination of the foregoing. In some embodiments, the magnetic permeability of the first and second sensing assembly connecting elements 173, 174 may be less than 5000x10 at a magnetic field of 0.002T^-6H/m. In the present embodiment, the first sensing element connecting element 173, the second sensing element connecting element 174 and the sensing element 180 (including the sensor 181 and the reference element 182) do not overlap when viewed along a direction perpendicular to the main axis O (e.g., along the X-axis and/or the Y-axis). The first and second sensing assembly connection elements 173, 174 at least partially overlap the sensing assembly 180 as viewed along the major axis O.

Fig. 7 shows a perspective view of the carrier 130 and the base 120 according to an embodiment of the disclosure. As shown in fig. 7, the reference element 182 is exposed to the carriage 130 when viewed along a direction perpendicular to the principal axis O (e.g., when viewed from the electrical contact 171A toward the center of the optical element driving mechanism 101). Since the driving coil 141 is disposed around the carrying seat 130, the reference device 182 is in contact with the driving coil 141 in the embodiment. In the present embodiment, the reference element 182 has a pair of poles 182A, 182B, and a virtual connection line connecting the poles 182A, 182B is parallel to the main axis O and passes through the sensor 181 (as shown in FIG. 5). In other embodiments, the reference element 182 may be a multi-pole magnet, and the poles thereof may be aligned substantially perpendicular to the primary axis O.

In summary, the embodiments of the present disclosure provide an optical element driving mechanism for disposing circuit pins on different sides of a base. Through the design, the circuits for connecting different circuit pins can be arranged on different sides, the size of the base on an X-Y plane is reduced, and the miniaturization of the optical element driving mechanism is further achieved. In addition, the contact point of the bearing seat and the elastic element is arranged to be staggered with the outer frame, thereby reducing the difficulty of manufacturing the optical element driving mechanism.

Although the embodiments of the present disclosure and their advantages have been disclosed above, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the disclosure. Moreover, the scope of the present disclosure is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but rather, the process, machine, manufacture, composition of matter, means, methods and steps, presently existing or later to be developed, that will be obvious to one having the benefit of the present disclosure, may be utilized in the practice of the present disclosure. Accordingly, the scope of the present disclosure includes the processes, machines, manufacture, compositions of matter, means, methods, and steps, described above, and any suitable combination of the features of the various embodiments, without departing from the spirit or scope of the disclosure. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present disclosure also includes combinations of the respective claims and embodiments.

Claims (20)

1. An optical element driving mechanism, comprising:

the fixing part is provided with a main shaft and a polygonal structure surrounding the main shaft;

a movable part having a bearing seat for bearing an optical element and capable of moving relative to the fixed part;

a driving component for driving the movable part to move relative to the fixed part;

a sensing component for detecting the movement of the movable part relative to the fixed part; and

a circuit assembly electrically connected to the driving assembly and the sensing assembly, wherein the circuit assembly comprises:

a first driving assembly connecting element electrically connected with the driving assembly and partially exposed from the fixing part; and

and a first sensing component connecting element electrically connected with the sensing component and partially exposed from the fixing part, wherein when viewed along the main shaft, the first driving component connecting element and the first sensing component connecting element are respectively arranged on different sides of the polygonal structure.

2. The optical element driving mechanism according to claim 1, wherein the circuit assembly further comprises:

a second driving assembly connecting element electrically connected with the driving assembly and partially exposed from the fixing part; and

and the second sensing assembly connecting element is electrically connected with the sensing assembly and is partially exposed out of the fixing part.

3. The optical element driving mechanism as claimed in claim 2, wherein the first driving element connecting element is disposed between the first sensing element connecting element and the second sensing element connecting element.

4. The optical element driving mechanism according to claim 2, wherein the second sensing element connecting element is disposed between the first driving element connecting element and the second driving element connecting element.

5. The optical element driving mechanism as claimed in claim 4, wherein the first sensing element connecting element and the second sensing element connecting element are respectively disposed on different sides of the fixing portion when viewed along the main axis.

6. An optical element driving mechanism according to claim 2, wherein the first driving element connecting element at least partially overlaps the sensing element when viewed in a direction perpendicular to the principal axis.

7. An optical element driving mechanism according to claim 6, wherein the first driving element connecting element does not overlap the sensing element when viewed along the principal axis.

8. The optical element driving mechanism according to claim 2, wherein the first sensing element connecting element and the sensing element do not overlap when viewed in a direction perpendicular to the principal axis.

9. The optical element driving mechanism according to claim 8, wherein the first sensing element connecting element at least partially overlaps the sensing element as viewed along the principal axis.

10. The optical element driving mechanism as claimed in claim 2, wherein the first sensing element connecting element has a first elongated configuration, the second sensing element connecting element has a second elongated configuration, the first elongated configuration and the second elongated configuration extend in a direction non-parallel to the main axis, and the first elongated configuration and the second elongated configuration extend in different directions when viewed along the main axis.

11. The optical element driving mechanism as claimed in claim 10, wherein each side of the polygonal structure is provided with at most one of the first elongated structure and the second elongated structure.

12. The optical element driving mechanism of claim 2, wherein the first sensing element connecting element and the second sensing element connecting element comprise at least one of steel, nickel, copper, and aluminum.

13. The optical device driving mechanism as claimed in claim 2, wherein the first driving component connecting element, the first sensing component connecting element and the second sensing component connecting element are disposed at a same corner of the fixing portion when viewed along the main axis.

14. The optical element driving mechanism as claimed in claim 1, wherein the sensing assembly further comprises a sensor disposed on the fixing portion, and the fixing portion further comprises:

an outer frame having a top surface and extending from the edge of the top surface along the main axis; and

a base fixedly connected with the outer frame and having:

a base surface facing the top surface;

a base opening formed in the base surface and corresponding to the optical element; and

a groove recessed from the surface of the base, wherein the sensor is disposed in the recess, and along the direction of the main shaft, the shortest distance between the surface of the base and the movable portion is smaller than the shortest distance between the sensor and the movable portion.

15. The optical element driving mechanism as claimed in claim 14, wherein the circuit component and the sensing component are disposed at the base.

16. The optical element driving mechanism as claimed in claim 1, further comprising an elastic element, wherein the movable portion is movably connected to the fixed portion via the elastic element, and the elastic element at least partially overlaps the sensing element when viewed along the main axis.

17. The optical element driving mechanism as claimed in claim 1, further comprising an elastic element, wherein the fixed portion further comprises an outer frame having a top surface located above the movable portion, the carrying seat having a plurality of contacts, the elastic element is connected to the carrying seat through the plurality of contacts, and the top surface is not overlapped with the plurality of contacts when viewed along the main axis.

18. The optical element driving mechanism according to claim 1, wherein the sensing element further comprises a reference element having a pair of magnetic poles, and a connection line connecting the plurality of magnetic poles is parallel to the main axis.

19. The optical element driving mechanism as claimed in claim 18, wherein the reference element is exposed from the carrier when viewed along a direction perpendicular to the principal axis.

20. The optical element driving mechanism as claimed in claim 1, wherein the driving element and the sensing element are disposed at corners of the fixing portion as viewed along the principal axis.

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